Name:Charles Montgomery E-mail address:charlesmontgomeryaz@msn.com Country:usa Comments:I was hoping to put on your site that I have a Technics sx-gx3 that is pristine, it was purchased in 1989 for $8,000 and I am trying to find a buyer for this beauty for a friend of mine that is an estate, would you happen to know someone? I live in Messa, Arizona USA just east of Phoenix, please let me know Thanks Charles Tuesday, June 12th 2007 - 10:13:11 AM Name:Charles Montgomery E-mail address:charlesmontgomeryaz@msn.com Country:usa Comments:I was hoping to put on your site that I have a Technics sx-gx3 that is pristine, it was purchased in 1989 for $8,000 and I am trying to find a buyer for this beauty for a friend of mine that is an estate, would you happen to know someone? I live in Messa, Arizona USA just east of Phoenix, please let me know Thanks Charles Tuesday, June 12th 2007 - 10:12:47 AM Name:dustin E-mail address:tuneinrecords(n0spam)@hotmail.com Country:USA Comments:My grandfather left us with his Technics GA5 and your website has been very informative in helping me learn more about the organ. I'm mainly a guitar player, but I learned music theory on a piano so I always enjoyed noodling around on the organ whenever we visited. Thanks alot. Dustin Sunday, June 10th 2007 - 01:14:04 AM Name:Wayne Smith E-mail address:goldeneagle000(n0sPAM)@msn.com Country:USA Comments:hi Vincent im glad to be a member on your list of Technics fans,I have the Technics KN6500,and
had the EA5,and the 901. I may sell the 6500 and go to the Yamaha Tyros2,and look for another EA5 take care Wayne. Saturday, June 9th 2007 - 02:14:27 PM Name:Janice E-mail address:catcondo(nosp~am)@earthlink.net Country:USA Comments:I am looking for an owners manual for Technics PCM Digital Ensemble piano SXPR170. I got this piano from an auction without operating instructions. It has many features, but I don't know how to use them without instructions. Can you help? Saturday, June 2nd 2007 - 04:37:47 PM Name:eglz E-mail address:crgonzalez72703(nosp~am)@yahoo.com Country:usa Comments:hi everybody, i own a technics c700 i'm looking for a owners manual or a owners manual for a technics g7 if any one can help me in my search please let me know. thank you eglz Thursday, May 31st 2007 - 08:09:21 AM Name:Graham E-mail address:grasut(N0sp_am)@btinternet.com Country:UK Comments:Hello, I've just purchased a Technics EN4. I have to say it's a beautiful organ - I'm so pleased with it. I paid only 340, which seems incredibly cheap for what you get. If seen in a showroom you'd expect to see a sales ticket over 1000. I wonder how much they cost originally? What a shame Technics stopped making these great instruments. Thursday, May 17th 2007 - 02:16:46 AM Name:Donald E-mail address:revierlewis(nosp_am)@msn.com Country:USA Comments:Hi,

I am trying to help a friend enjoy an original composition of her late husband. She has asked that I convert the 3.5" floppy disk recording into a piece of sheet music that she could play. My complication has been to convert the SEQ file to a MIDI file. Is there a conversion program available? Any help would be greatly appreciated. Don Lewis (Vincent - you may want to refer to my tip "How to Convert your Organ Performance into General MIDI file" found in my website. Use Method 1. You can then use a program such as Cakewalk or something similar to edit and print out the desired bars of that MIDI file. I presume you will only need to print out the upper manual notes) Tuesday, April 10th 2007 - 12:19:28 PM Name:Rita E-mail address:searita01(nos_pam)@comcast.net Country:USA, California Comments:The church I go to was given a Technics SXFN3 organ and a Technics Keyboard SXKN3000. No manuals were included, but I was able to download the manual for the Keyboard SXKN3000. There doesn't seem to be a manual available for the SXFN3 organ. Do you know where I can find this manual. Also, the person who donated these two instruments would like the church to provide him with a document for proof of donation. Is there any way to find out what these two instruments are worth? Grateful for any help and information you can provide. Friday, March 30th 2007 - 01:44:43 AM Name:Diantha E-mail address:diantha(nospam)@rivercityband.com Country:US Comments:Hi, We are in possession of a Technics SX FN3 - I have a photo. We would like to sell it. Any pricing suggestions. It is in good condition. The wood needs a little TLC. Thanks. Thursday, March 29th 2007 - 04:08:42 AM
Name:Mary E. Hill E-mail address:mary(n_ospam)@hillspride.com Country:USA Comments:I just inherited a Sx-G100 and an EN4 organ from my mother who passed away. Will keep the Sx-G100 organ and try to learn how to play it. Don't know how to go about selling the EN4. Any ideas? Mary Monday, March 26th 2007 - 01:02:38 PM Name:Gene Roberson E-mail address:feroberson(nosp_am)@aol.com Country:USA Comments:Hi VIncent, I may have signed your guest book before. I used to play for Technics and was one of the main TECHNICS organ dealers in the US from 1985 till 1998. I get used Technics organs all the time and can ship them all over the world. If anyone needs information about TECHNICS and is looking for one. Please let me know. I currently have an EA-5 in stock. website is www.generoberson.com Take care Gene Roberson Monday, March 19th 2007 - 10:28:20 AM Name:johnnie E-mail address:johnnie.c(n_ospam)@lineone.net Country:UK Sunday, March 18th 2007 - 05:47:48 AM Name:NAClark E-mail address:naclark(nospa_m)@fcgchurch.org Country:USA Comments:Dear Sirs: I'm looking for Voice Disks and Classical registration disks for an Electone EL90 Yamaha Organ. Thanks, NAClark Wednesday, March 7th 2007 - 12:34:12 AM Name:JACOB DEY E-mail address:joicson(nospam)@yahoo.co.uk Country:ACCRA-GHANA Comments:Dear sir, My name is Jacob and live in accra ghana in wast coast of wast africa. l have Technics

Country:England Comments:Hi everybody & a Happy new year 2007 Well I am happy to say that I am now the proud owner of Technics organ again.An SX-EA3 to be exact. But has anybody got any info how to set up the sounds like say on the demo. I can select what I want but am unable to transfer them to the appropreate manuals / pedals/etc.I am only a grade 3 player so this manual has me a little baffled, on my older E66 & E55 their used to be a Harmonic Coupler which gave a non pro like me a decent l/Hand on sustained chords with a good rythme and pedal chords pattern. Can I get this on the sx-ea3 Any help Jim Sunday, January 7th 2007 - 04:53:44 AM Name:Tony Luker E-mail address:arwluker(NOsPa_M)@hotmail.com Country:Australia Comments:I have a Technics PCM E66 but I need an owners manual. Any help would be appreciated. Thanks tony Luker Wednesday, January 3rd 2007 - 01:07:14 PM Name:Steve E-mail address:organised(no5pam)@btinternet.com Country:United Kingdom Comments:Hello again ! Since my last entry on here I now own 2 more Technics models.a C700 portable complete with 2 SY-T70 Cabinets and an old KN 600 keyboard. They are both in very good condition for their age but I am really struggling with operating the KN 600. Does anybody have a copy of an owners manual at all please ? Incidentally, there is a very new Technics User Group in need of some new members at: http://launch.groups.yahoo.com/group/technics _owners_plus/ Best wishes for Christmas and the New Year to you all. Steve
Sunday, December 24th 2006 - 06:11:04 PM Name:Adjie Yuandra E-mail address:yuandra_ichlas(nosp_aamm)@yahoo.co.id Country:Indonesia Comments:1). How much the price of SX-EA 3 ( Technics organ ) 2). Where is the place that I can buy in Jakarta,Indonesia? 3). Is that easy to sale it again ? 4). Where is the place ( in Jakarta, Indonesia )that I can sale this organ ? ( completely address & Phone number ) I am waiting forward of your answer, thank's a lot Hi Adjie, Panasonic no longer sells EA3. You can only buy a used Technics organ unfortunaely__Vincent Saturday, December 23rd 2006 - 11:16:56 AM Name:Mick Clayton E-mail address:mick(nos_pammM)@draytonsom.co.uk Country:UK Comments:Great site, good information. Saturday, December 23rd 2006 - 05:22:37 AM Name:Charlotte A Williams E-mail address:chachacha972(noosppam)@yahoo.com Country:usa Comments:I have a Technics G100 Organ with a Cherry Cabinet I got in 1998. It's beautiful! I took the lessons provided but didn't learn much. I do have the Owner's Manual. I've never had Organ Lessons. I play the accordion by ear so I know the chords on the accordion. I used to have a Thomas J Chordion Chord Organ (1958) similar to the accordion; I wish I could find one now. I don't know how to play my G100 very well. I also have a Keyboard Technics KN5000 (1998), but I have lost the power cord and haven't been able to replace it yet. I live at Columbia Kentucky. There are no Music Stores here. I enjoy reading your articles. Thursday, December 21st 2006 - 02:33:48 PM Name:John Sloggett Sr

E-mail address:slogja(no-sp-am)@charter.net Country:USA Comments:We are looking for a manual for our Technics Organ SX-EA1. If you have one or know where we might be able to get one it would be appreciated very much. Monday, December 18th 2006 - 02:12:26 AM Name:Jim E-mail address:Sweeney Country:UK Comments:Hi I am trying to sell a Technics GA3 Good condition house move forces sale.Looking for reasonable offer for this fantastic organ. Location Cheshire Please e mail jim(nospam)@genexdesign.com Saturday, December 2nd 2006 - 04:48:34 PM Name:philip mulcahy E-mail address:philip.mulcahy(nosp-am)@ntlworld.com Country:england Comments:really enjoy regularly looking over the site and digesting all the valuable information , thanks for this wonderful site , regards phil Thursday, November 30th 2006 - 06:39:38 PM Name:Bob Green E-mail address:keyboardbob(nosp_a_m)@netzero.net Country:US Comments:Love your site. Find it very interesting and I don't have a Technics; but would like to. I do have a Kawai KX5000. Tuesday, November 28th 2006 - 05:58:00 AM Name:Murray Best E-mail address:murraybest(nospa_m)@rogers.com Country:Canada Comments:Hi Vincent: Thanks for your website. I'm going to try some of the technical tips for Composer and Sequencer on my GA3. I totally agree with your desire to own this model. Mine came from an insurance claim when my G7 was ruined by a lightning strike. I'd call it a lucky strike!
Are you still keeping up your site? Mail bag posts seem to be from last year.
Again, thanks for the info and good luck. Cheers, Murray Dear Murray, I not been updating my site for over a year now.__Vincent Thursday, November 23rd 2006 - 07:24:59 AM Name:Steve E-mail address:organised(nospa=m)@btinternet.com Country:United Kingdom Comments:Great website !! Keep up the good work !! I was in organ retail from 1980 - 1985 and witnessed the arrival of the "U" series and the "E" series. I own an EX70 with SY-FD1 Floppy Drive plus an SY-T50 Tone Cabinet. I also have a Lowrey TLOKS Holiday.hey, that's not for this site. Cheers Steve Monday, November 20th 2006 - 03:44:59 AM Name:alfredo d. gagaza E-mail address:alfredod.gagaza(nossspam)@yahoo.it Country:italy Comments:im a filipino but now residing here in italy and playing pipe organ everyday during the mass. 15 years ago i purchased a technic organ and used that in the church, now i am planning to buy again an organ for everyday use, please advice me where and how to buy. thanks a lot. Monday, November 20th 2006 - 02:44:56 AM Name:Jim Rawlinson E-mail address:j.rawli(nosp_am)@tiscali.co.uk Comments:Hi just found this site whilst looking for technic models as they have me baffled. can
you give me a list of the models going back say 15 years till they stopped making them which was a wicked shame" I have owned two technics an E- 55 and the E-66 for many years I had to sell them so I am looking for a Technic again but don"t know what is good and what is not so good,there are alot for sale but do not know what model to go for. can you help Regards Jim this is a very good site all the best you technic lovers Tuesday, November 7th 2006 - 11:49:02 PM Name:Boyet Villanueva E-mail address:villanuevaboyet(no=sp_a_m)@yahoo.com Country:Philippines Comments:Hey guys! Im googling for Spare Parts or Service Technician that can fix my SX U60 when i came accross your site. I'm glad to hear that there are still others like me who play these organs by Technics. Too bad, no more production and no product support. What happens when your units go busted? Mine died 10 years ago and still can't find anyone who can repair it. The last information i heard about my technician (Gi Gonzales) was that he already migrated to the US. I don't have any contact information about him. I really want it repaired or i may have to sell it on ebay "as-is where-is" coz I already have a YAMAHA EL90 to tinker around. I will really appreciate anyone who could give me information that can lead to the resurrection of my U60. Thank You. Wednesday, November 1st 2006 - 10:21:02 PM Name:Matty E-mail address:mattydemont((N_0_S_PA_M)@hotmail.com Country:Belgium Comments:Great resource for Technics owners! I discovered this website today because I found a vintage 1963 National Electronic Organ SX601 with tubes. I am now trying to get more information (manual) for this great organ. Thanks for sharing your knowledge with us! Thursday, October 19th 2006 - 11:59:26 PM

Name:Andrew Mackay E-mail address:amackay(_NOSPAM_)@btopenworld.com Country:England Comments:I have always loved the souds of Technics organs now I gig with a G100, previously with a GA3 which I used for nearly 10 years.I'd love an FA1 just for home but can I find one!! And the EA5 is packed with lots of sounds as well Friday, September 8th 2006 - 12:10:32 AM Name:schofield E-mail address:scokendot(NOSP_A_M)@hotmail.com Country:UK Comments:great site can you held Im looking for a manual or copy for an ELKA C700 electic orgam Sunday, September 3rd 2006 - 05:29:16 PM Name:Paulmilleruk E-mail address:paulmilleruk(n0Spa_M)@tesco.net Country:UK Comments:Great site and great content, i will pass this around to my friends around the world. Kindest Regards Paul Friday, August 4th 2006 - 07:40:38 AM Name:Judy E-mail address:orchestrating(nos_pAm)@gmail.com Country:USA Comments:Your website is great! Thank you for sharing with us. Monday, July 10th 2006 - 10:14:18 AM Name:Young E-mail address:Young(nOS_PAm)@yahoo.com Monday, July 10th 2006 - 01:54:19 AM Name:Tony Tyreman E-mail address:tonysmusic(no_spa_m)@uk2.net Country:England Comments:Just bought Technics GX5 Organ Previously owned U60, Pro90, KN1400 Also play Ketron SD1 keyboard Tuesday, June 20th 2006 - 06:48:33 PM
Name:Larry & Nancy Lenon E-mail address:nancyl(nOsP_aM)@oregonvos.net Country:U. S. A. - Oregon Comments:Technics SX-FA1 for sale, purchased new in 1997, and was played only occasionally. It has not been used since 2000 and has always been kept in the living room. Mint condition. Two manuals, 61 keys each; 25 pedal keyboard; 320W thru 8 speakers; 12 instrumental sound groups, 200 preset sounds; 4 organ groups, 10 organ types; 14 rhythm groups, 140 patterns; transpose; 16-track Sequencer, 28,000 note storage; digital disk recorder; LCD display; illuminated keyboards, pedals & music rack; background sounds; MIDI in/out/thru; 345 lb (organ, pedals, bench). There is lots of sheet music, manuals, etc. to go with it. Pictures are available. Please contact us if you are interested. Monday, June 12th 2006 - 04:57:10 AM Name:Robert Ramos E-mail address:rsaggas1(n0_PaM)@yahoo.com Country:USA Comments:I'm looking for a Technics SX c600. Do you know who or where I can get one. I know they have been discontinued for sometime. I love the piano and organ sounds it has. If you know of anyone who has one please feel free to email me. Sunday, June 11th 2006 - 02:55:44 PM Name:Larry E-mail address:jmcmu22130(nosP_aM)@aol.com Country:USA Wednesday, June 7th 2006 - 09:48:48 PM Name:John Freeman E-mail address:rcdarts(no_spam)@teleport.com Country:Oregon - USA Comments:TECHNICS SX - F100 For Sale Absolutely like new. My father has quit playing. Thanks for your interest. Thursday, May 25th 2006 - 02:46:36 PM Name:Norman Goldsobel E-mail address:ngoldsobel(nOspA_m)@yahoo.com Country:USA Comments:I own an SX-FN3 since 1990 and still love it.

However; I would like to enhance the flute section which seems to be voiced from Hammond. PS: Great website! Thursday, May 18th 2006 - 09:33:51 PM Name:Wayne Spencer E-mail address:wayne(nosPa_m)@spencers.net Country:USA Comments:I recently bought an EA5 and was amazed how close it is to the G100 which is what I dream to own. Your website is one of the very few with information about the wonderful Technics organs. I cannot believe that these beautiful instruments are no longer manufactured. Thanks. Tuesday, May 16th 2006 - 08:58:12 AM Name:Bill Musker E-mail address:rona(noS_paM)@ronachristie.freeserve.co.uk Country:UK Comments:Thanks Vincent for giving me an entry to get info re my newly acquired little SX EN1 Bill Musker Wednesday, May 10th 2006 - 03:15:42 PM Name:Duncan McCubbin E-mail address:Duncaccordion(nospAm)@Yahoo.com.au Country:Australia Comments:A great site-I am in the process of purchasing an SX-Ea3. Thanks.Duncan Thursday, May 4th 2006 - 06:26:15 PM Name:Patrick Yap E-mail address:midastp(noSpAm)@streamyx Country:Malaysia Comments:Thanks for your great information, I'm having YAMAHA CVP 307 digital piano, how can I conact it with my EA3, and. any one would like to share our EA3 format data.. All the best! Thursday, March 30th 2006 - 09:36:21 PM Name:Patrick Yap E-mail address:midastp(noSPAm)@streamyx
Country:Malaysia Comments:Thanks for your great information, I'm having YAMAHA CVP 307 digital piano, how can I conact it with my EA3, and. any one would like to share our EA3 format data.. All the best! Thursday, March 30th 2006 - 09:34:24 PM Name:Don Story E-mail address:Story61(noSPAm)@aol.com Country:US Tucson, AZ Comments:Hi Vincent - I sent a email about some things I felt needed clarification or correction for the Mail Bag inquiries I read today. I belong to a Technics club here in Tucson and welcome questions people might have altho I'm no technical whiz on MIDI or sequencer operation. Thanks for your e-mails. My home PC has been down for the last 2 months. But my new self assembled speedy Dual Core Pentium PC is now up and running. Need to find time to make the changes in my website. Vincent June 2006. Tuesday, March 28th 2006 - 05:06:03 AM Name:Bill Tyson billtyson(NOSpaM)@wdE-mail address: jmtyson.freeserve.co.uk Country:England Comments:The first Technics I owned was a GA3, but due to space I changed to Keyboards finishing with a KN7000. Since the demise of Technics I decided to change to Yamaha Tyros 2 and whilst both of these keyboards have a lot going for them, I still hankered after the Technics organ and came across an EA3 which I bought and this led me to your site,and after reading all the technical help available I am truly glad to have a Technics organ again although to a lesser extent, and I shall certainly pursue some of your recommendations. If you've got a quality organ, hang on to it, for whilst keyboards have their place, they can't compare to an organ. Being a caravanner, I found both of these keyboards too heavy and cumbersome to take around, and lesser breeds don't satisfy. Very glad to join your site, Bill Tyson Monday, March 20th 2006 - 06:03:05 AM

often have difficulty with the technical side. thank you once again Friday, January 13th 2006 - 05:28:40 AM Name:Thomas Clark E-mail address:Buymocarz(n0spam)@ctc.net Country:USA Comments:I fell in love with Technics when I bought my first FN-3. I have always desired the larger instruments in each brand name and currently own an F-100, an FA-1 that I transplanted into an older case to give it the "B-3" look, ans a PR-903(Technics digital piano). Thanks for your site. Maybe we can encourage other Technics owners to get involved. Wednesday, January 11th 2006 - 10:25:38 PM Name:Elizabeth E-mail address:lepeters(nospa_m)@worldnet.att.net Country:USA Comments:Great reference and info. web site(s) Old Technics organ,no documents, new player. Need setup help. See, e-mail Tuesday, January 3rd 2006 - 08:31:41 AM Name:Roger Hook E-mail address:randm(nospa_m)@easynet.co.uk Country:England Comments:Nice site. First place I found any pics of Technics organs. Was looking for a guide to second hand organs (with good piano touch) for my first purchase. New Year Resolution is to be get keyboarding! But I have yet to find any sort of guide to instruments of the past, their features, quality and reasonable prices. I'll keep looking. Rog. Thursday, December 29th 2005 - 07:20:52 AM Name:Richard Hsu E-mail address:richsu(nospa_m)@295.ca Country:Canada Comments:Vincent: I had heard in Canada that Technics no longer manufactures electroni organs. Is this correct? If so, what is the reason behind it? Richard
A real pity Technics stopped making console organs. It is probably a lifestyle change thing.kids preferring to play on the computer rather than picking up music lessons. With the shrinking market, only a handful of players are left. It was thought that the success of Technics keyboards killed the console but I doubt that it played such a significant role. There have not been any official announcements by Technics on this topic as far as I know - Vincent Sunday, December 4th 2005 - 12:23:19 PM Name:GEOFF THOMPSON E-mail address:wilfthommo(n_ospam)@yahoo.co.uk Country:U.K. Comments:I HAVE SXGA3 AND THINKING OF CHANGING TO A KEYBOARD THE ORGAN IS IN EXCELLENT CONDITION BUT I HAVE NO IDEA OF ITS VALUE COULD ANYBODY HELP ME Wednesday, November 9th 2005 - 05:39:33 AM Name:Jim Dehls E-mail address:dacapostudio(no_sp_am)@yahoo.com Country:USA Comments:Thanks for the XS-GA3 information Tuesday, November 8th 2005 - 12:39:18 AM Name:Paul Beesley E-mail address:betabee(n_osp_am)@kooee.com.au Country:Australia Comments:hi vince came across your site whilste looking for the date a technics organ was built sxu40 serial g513154. I currently own a lowrey symphonic organ and I`m teaching myself to play, very hard on an old mind. Where stuck out in the bush with no teachers or mr fixit men. i have the opertunity to buy this organ for a very low price but need to know a bit more about it if you can help it would much appreciated. Love you web site regards, beezo Monday, November 7th 2005 - 09:26:30 AM Name:Louise E-mail address:beta11(nospa_m)@bellsouth.net Country:USA Comments:Greetings to you, your wife, and your child. I'm an elderly woman with no musical training (!) who received a pre-owned Technics GA-3 as a wedding anniversary gift. Though a

beginner, I have learned to read music and do use fingered chords with corresponding pedals (but haven't mastered pedal, chord, chord and other rhythyms). It's a good thing a video tape was included because I can not make sense of the reference book and I do not know how to make the sounds that are in the demo. Your website has been very helpful to me and I thank you for your kindness in sharing. Louise Tuesday, November 1st 2005 - 08:42:09 PM Name:Leo Piche E-mail address:leopiche(nospa_m)@telusplanet.net Country:Canada Comments:Hello from Canada ! Do you think a "slightly used SX EA5 in good condition worth $2500.00 U.S. ? I am looking at one and I at a lost to evaluate this very interesting machine. I thought I would talk to an expert. It is in good consition ( was used for some time to give lessons) but it sound great. Would it fair to offer $2500.00 to the dealer ? Leo Piche Saturday, October 22nd 2005 - 04:40:43 AM Name:Ruth Beac E-mail address:donbch(no_s_pam)@earthlink.net Country:USA Comments:Great information >>Keep up the good work >> I have a GA 3 Saturday, October 15th 2005 - 10:42:55 PM Name:Paul Brown E-mail address:paultbrown1(nospa_m)@verizon.net Country:USA Comments:I just bought my first Techics - an EA3 and have already found some great ideas on how to better enjoy this instrument - like improving the sound quality of the speaker system. I used to have a Lowrey but have not had an instrument since 1991 - so besides having to learn how to play all over again, I also have a new machine to also learn how to operate. When I have question re: your website, I will not be bashful.
Paul Brown Friday, September 16th 2005 - 12:47:58 AM Name:Linda Jones E-mail address:lmjones(nospam)@socal.rr.com Country:USA Comments:I was having trouble adjusting the lower keyboard volume on my FN3 organ, and you answered my question and solved the problem. I inherited the organ from my parents 12 years ago. (Incidentally, they bought it from Gene Roberson, who also signed your guestbook.) However, I was considering selling it because I've never been able to resolve this volume balance problem. Now I can play familiar melodies using the Auto-Play Chord feature. Thank you very much for your advice and for your wonderful website. I will bookmark it for sure! Wednesday, September 14th 2005 - 12:19:09 PM Name:Gene Roberson E-mail address:feroberson(nospam)@aol.com Country:USA Comments:Hi all. Have not visited this site for a long time. I still get really nice used FA-1 Technics from time to time. Let me know what you are looking for. Gene Roberson Monday, September 12th 2005 - 05:20:49 AM Name:Martin Graap E-mail address:m.graap(nospam)@gmx.de Country:Germany Comments:Great site, especially the six evolution pics. I'm proud to be a Technics owner myself. I've got an SX-G5 (which you can see in the 19821986 section) for almost 18 years now, and last month I got me an SX-C700 (which you can't see in the 1982-1986 section though you should). Greetings, Martin P.S.: Hi Silvester and much fun with your dream come true! Monday, August 22nd 2005 - 05:08:33 AM Name:James Papa E-mail address:jpapafl(nospam)@bellsouth.net

Country:U.S.A Comments:I have the technics organ Model # SX-GX3. Have the chance to pick up a technics EA5. Is this an upgrade for $2.000 dollars? BOTH ARE IN GREAT SHAPE. Wednesday, August 10th 2005 - 04:51:01 AM Name:Silvester Huisman E-mail address:s.c.n.huisman(nospam)@wanadoo.nl Country:the Netherlands Comments:Hi all you Technics-fan's, At the moment I'm the proud owner of another Technics-organ SX-G7. My second Technics next to my superb SXGA3. Both are in my livingroom, and I enjoy playing both ! You can check out more at: www.organportal.com Have Fun, Silvester Monday, August 1st 2005 - 08:25:58 PM Name:Jens Erslev E-mail address:bioslg(nospam)@sgt.dk Country:Denmark Comments:I am an Organcollector from Denmark, interested in the Technics SX-A1 showorgan with the 3 original external speakercabinets. Wednesday, July 27th 2005 - 02:11:48 AM Name:Robert Ricchiuti E-mail address:rricchiu(nospam)@nycap.rr.com Country:USA Comments:I am interested in purchasing a Technics SXFA1 or SX-F100. I am in the Albany, NY area. If you have one for sale, please let me know. Wednesday, June 15th 2005 - 11:26:06 PM Name:Bill Stevens E-mail address:jobsite(nospam)@charter.net Country:USA Saturday, June 11th 2005 - 04:49:15 AM
Name:Alan Grant E-mail address:agrantnospam@blyth7.fsnet.co.uk Country:England Comments:Like your site for workings on technics organs. Saturday, June 4th 2005 - 03:22:36 AM Name:Silvester Huisman E-mail address:s.c.n.huisman(nospam)@wanadoo.nl Country:the Netherlands Comments:Hi Vincent, I posted before, but forgot to mention our new Dutch Organ Forum, have a look, some is in English too. www.yourhobby.nl Stil great fun with the superb SX-GA3 !!!! It's the best ! Silvester Thursday, May 19th 2005 - 01:48:04 AM Name:Dennis Lines E-mail address:dennis.lines(nospam)@ntlworld.com Country:UK Comments:Finding your website was a welcome surprise almost as good as finding an oasis in a desert. Thanks for taking the time to set it up. Tuesday, March 29th 2005 - 08:01:53 PM Name:david locke E-mail address:davidlocke(nospam)@slx-online.biz Country:uk Comments:Found your site very useful and informative having recently acquired an SXEA-5,I love it! Sunday, March 6th 2005 - 07:32:20 PM Name:Tony Blair E-mail address:tonyblair24(nospam)@yahoo.com Country:United States Comments:Also wanted to thank you for the web site, I have been looking for a site with all of the Technics models for a long time and have finally found one!!! Thanks again, Tony Tuesday, February 22nd 2005 - 07:37:27 AM

Technics don't do this kind of site Thank You Tuesday, December 28th 2004 - 09:06:45 PM Name:Dave Chilton E-mail address:chilton99(nospam)@hotmail.com Country:United Kingdom Comments:Nice to find someone taking interest in Technics I have an EN2, I have been on ebay to look at up grading I bought an EX15(L) thinking it was better than mine I'm glad to find your web sight it has given me idea what to look for. Technics don't do this kind of sight Thank You Tuesday, December 28th 2004 - 09:03:38 PM Name:Don Story E-mail address:Story61(nospam)@aol.com Country:US Comments:Hi - good luck with your site and Technics efforts. I have a EA5 which I'm very impressed with. Would like to find a GA3 or G100 someday. Also have several smaller, older Technics models. Don 12-12-04 Monday, December 13th 2004 - 02:46:05 AM Name:Megan E-mail address:tiongtze(nospam)@yahoo.com Country:Malaysia Comments:Hi there, I tried with the cables, and connect my pc to my EA3, however songs that i played it cannot record at all on pc. Tuesday, December 7th 2004 - 01:24:46 PM Name:George Gocha E-mail address:gocha2(nospam)@netzero.net Country:United States Comments:HI.I JUST BOUGHT A SX-EA3 On EBAY.I was looking around for information on it, and checked out your web page, you seem to enjoy yours.I liked what you have to say about this fine instrument. Wednesday, December 1st 2004 - 03:17:07 AM Name:Thomas Chin E-mail address:tsmy24(nospam)@hotmail.com Country:USA Comments:Hello there, What do you think of the GN9? Unfortunately, electronic organ music is going the way of the
dinosaurs. Do you know Pat Lee from JB? Hope to hear back from you. TC. Monday, November 29th 2004 - 07:49:12 AM Name:Andrew E-mail address:abosch(nospam)@sports.uct.ac.za Country:South Africa Comments:An excellent site. Thursday, November 25th 2004 - 05:46:03 PM Name:Henry Treichrob E-mail address:henryteichrob(nospam)@telus.net Country:Canada Comments:Can you perhaps tell me where I might get a User's Manual gor a Gulbransen (Equinex Musicopmuter 215) organ? Thank you very much. HT Tuesday, November 23rd 2004 - 12:19:13 PM Name:Roger Tasker E-mail address:srtasker(nospam)@aol.com Country:U.K. Comments:Having just bought an SX - EA3 I have found your site informative and helpful. Keep up the good work. You never know, by showing sufficient interest in their fine (ex) products Technics might re-consider their policy on manufacturing spares for their customers! Wednesday, November 17th 2004 - 11:16:59 PM Name:Giuseppe E-mail address:giuseppe(nospam)@electone.it Country:Italy Comments:Very nice site! Giuseppe www.electone.it Sunday, November 14th 2004 - 11:12:09 PM Name:Eric Shepherd E-mail address:shepherderic(nospam)@hotmail.com Country:England Comments:Very informative site, unique on the internet from what I can see. Eric

repair should it suffer a breakdown. How durable/relable are these organs? Will it last? Please help me. Ted Wednesday, April 7th 2004 - 11:00:02 PM Name:Koichi Ikeda E-mail address:i_like_roland(nospam)@msn.com Country:Japan Comments:I owned GA1 at the time of 6 years old. Only the easy record was able to be used in the beginning. I understand all the functions of GA1 and am tackling music manufacture now. Thursday, March 4th 2004 - 10:49:56 PM Name:mark whitlam E-mail address:babylonmark(nospam)@hull24.com Country:u.k Comments:fantastic site found all the information i needed. if it wasn't for this site i would have gone bonkers spending hours searching the net for info. many thanks. mark. Sunday, February 1st 2004 - 04:09:37 AM Name:Dave Nicholson Country:New Zealand Comments:I have had your site pointed our to me by a friend. I have been looking for something like this for a long time,especially one for Technics Organs, rather than Keyboards. and for those people lucky enough to have some computer skills. Amongst my collection of organs I have a GA3 and GX7. Both lovely machines. Thru your club ??, I hope to be able to meet cyber friends with similar interests. Thursday, January 29th 2004 - 03:02:44 PM Name:Wanda Maulhardt E-mail address:maulhardts(nospam)@hotmail.com Country:usa Comments:My Technics SX-EA3 was just delivered. Do you know where I can find the large manual so that I can learn to set the stops for church organ music? Thanks for any help.
Dear Wanda, If you are refering to the organ operating manual, you can download them via a link in my website. http://web.singnet.com.sg/~gohcsv/Downloads. htm It will link you to a Technics/Panasonic website. By the way, the EA3 has unfortunately only limited presets for organ music unlike the other bigger Technics models which has drawbar.

Vincent

Saturday, December 13th 2003 - 05:01:33 AM Name:Richard Tittel E-mail address:rntittel(nospam)@att.net Country:USA Comments:Wonderful web site. Good to see what you are doing with the organ and music in general. My interest are in arranging and playing music. I did make a CD by recording my playing to a cassett and then playing the cassett into the "Roxio Easy CD Creator" in my computer. Turned out well but that is as far as I have gone in doing more things other than arranging and playing. Friday, November 21st 2003 - 12:20:46 AM Name:Tony Briscoe E-mail address:tony(nospam)@homeleigh33.freeserve.co.uk Country:UK Comments:Hello Vincent and Sok I had an e-mail from my friend Armando bringing your web site to my attention. I have found it entertaining and interesting as I am also interested in organs. I have the GA3. I particularly liked the organ files I downloaded from your site, they sound really good,thank you. It's a pity you cannot find the time to join the OBI club, I am sure you would be most welcome, and useful to our members, and you may even find something that interests you. Tony Briscoe Wolverhampton

Sok Leng'a website - is marvellous! Enjoy, sis. Monday, November 11th 2002 - 06:17:51 AM Name:Margaret E-mail address:webmaster(nospam)@organfax.co.uk Country:UK Comments:Thanks for telling me about your new project. I must congratulate you on a very interesting and nicely presented site. I'll put in a link, if I may, from our ORGANfax site and would much appreciate a reciprocal link to www.organfax.co.uk, which is possibly the largest and most comprehensive site in the UK for the organ and keyboard enthusiast. I'll visit again to see how the site develops. Tuesday, November 5th 2002 - 05:32:41 AM

HIGH PERFORMANCE ANALOG

Power Management Application Guide for Actel FPGAs
Using Switchers to Power Actel FPGAs
FPGAs continue to grow in density and complexity while at the same time, shrinking device geometries have enabled faster system clocks and required lower core voltages. These trends call for more demanding power supply solutions, particularly for distributed power systems and point-of-load designs that are low-cost, high-efciency, and still meet the strict requirements of these new devices. Often the logic designer is tasked with developing their own local power supply solution without the necessary knowledge to select from the many choices available. This application guide provides guidance and two example designs to help the design engineer choose an appropriate solution for systems utilizing Actel FPGAs.

System Power

Sequencing and Supervisory

DC-DC Converter(s)

VAUX VI/O VCORE

DDR Memory Power

VTT VDDQ

DDR Memory

Inside:
Intersils Recommended Power Supply Solutions Including Schematics and BOMs Selection Tables Actel FPGA Power Tables DDR Memory Power Solutions Sequencers and Supervisory Circuits Layout Considerations
For more information on Intersils Power Management products, call us today at 1-800-556-0225, or visit our web site at

www.intersil.com/actel

Sim Check out Intersils online power supply simulation tool at www.intersil.com/isim
Intersil is a recognized global leader in power management solutions, offering a
broad portfolio of products that will simplify your power designs. Intersils Endura family of power management products ranges from simple building blocks such as charge pumps, to highly integrated multiple output and multiphase PWMs, to dual voltage hot swap controllers. As a leading supplier of PWM controller ICs with over 1 billion shipped, Intersil can meet your power needs and provide the following benets for your designs: Reference designs and evaluation boards Unprecedented performance and reliability High efciency Complete system monitoring and protection (reduces the need for many external components) Superior technical support This application guide features device solutions listed by performance and function. The selection tables and solution diagrams will help guide you to the right solution for your designs. Our global network of experts is ready to assist you in building cost-efcient and high performance designs.
What type of regulator should I use?
There are 2 basic types of power regulators that are used in most electronic products; Linear regulators are inherently inefcient because of the continuous voltage drop across the regulator. At higher current levels required by some of the newest generations of FPGAs, linear regulators can generate large amounts of heat. Effectively managing this heat presents additional design challenges for the system designer. Switching regulators are inherently more efcient because they are theoretically on only when power is needed. In addition, switchers can maintain efciencies in excess of 90%, even when the input and output voltages differ by a large amount and the current requirements range from a few mA up to 100A. The decision on the type of regulator to use should be determined by efciency requirements, thermal management strategies, space constraints, and cost. In many cases, there are good reasons to use both types of regulators in the same design. Regulators are available in several congurations, including single-phase switchers, multi-phase switchers, and integrated regulators offering combinations of multiple switchers and/or linear regulators in a single package. Example applications of varying cost/complexity are presented in this document.

Copyright Intersil Americas Inc. 2004. All Rights Reserved. Intersil (and design), i (and design), and iSim are trademarks of Intersil Americas Inc. All other trademarks mentioned are the property of their respective owners.
Intersils Recommended Power Supply Solutions
Programmable Logic Power Requirements
There are four components to the power prole of todays FPGAs: Inrush Current: As the logic device is powering up, the power required to establish the initial internal biases on the logic array can result in a signicant inrush current spike that can last many microseconds. To allow the FPGA to power up cleanly, the power supply must be capable of providing the required peak output current. Unlike SRAMbased FPGA technology, Actels non-volatile antifuse and ash technology result in almost negligible inrush current, typically less than 10mA. Conguration Current: SRAM-based FPGA technologies do not retain their logic conguration when powered down and must therefore be reloaded with conguration data on every power-up cycle. Actel FPGAs are nonvolatile and therefore do not require a conguration cycle. Thus the requirement for short-term conguration current does not exist. Static Current: Static currents are the result of leakage and bias currents in the transistor structure of the device and are not frequency dependent. Static power is the minimum amount of power that the device will consume. Dynamic Current: This component of the device power is frequency dependent, resulting from the charging currents on internal chip capacitances and external I/Os during signal state changes. Since Actel FPGAs have negligible inrush and conguration current, the dynamic current is typically the dominating requirement for the power supply design. An Actel FPGA requires one or more power supplies, depending on the specic device and application where it is used. The requirements for power supply output current and output quality may also vary by family and device. In most cases, separate voltages are required for the core logic and I/Os. I/O Voltage: The choice of I/O voltage is exible so that the logic designer has the ability to choose appropriate I/O voltages to satisfy the needs of the system design. I/O voltage requirements can be based on the needs of other devices in the circuit, compliance to I/O standards such as PCI, or other system needs. Array (core) Voltage: Unlike the I/O voltages, where the designer has many exible options, the logic array voltage is dened by the FPGA familys process geometry and is xed. These are summarized in Table 1.

Table 1

Actel FPGA Family SX-A APA AX Process Geometry (m) 0.22/0.25 0.22 0.15 Array Voltage (10%) Desig. VCCa VDD VCCa (V) 2.5 2.5 1.5 I/O Voltages (10%) Desig. VCCi VDDp VCCi (V) 2.5, 3.3, 5.0 2.5, 3.3 1.5, 1.8, 2.5, 3.3

Intersil Power Supply Solutions

Switchers

Device ISL6521 ISL6526 ISL6526A ISL6528 ISL6224 ISL6227 ISL6539 ISL6402 Description Sync Buck + 3 LDO Low Voltage Sync Buck 300kHz Hi Freq. Sync Buck 600kHz Buck + Linear High Efciency Sync Buck Dual Sync Buck with Sequencing Dual Sync Buck with Sequencing Dual Sync Buck + Linear VIN Range 5V 3.3V to 5V 3.3V to 5V 5V 3.3V to 24V 3.3V to 24V 3.3V to 15V 4.5V to 24V VOUT Range 0.8V to 4.5V 0.8V to VIN 0.8V to VIN 0.8V to 3.3V 0.9V to VIN 0.9V to 5.5V 0.9V to 5.5V 0.8V to VIN IOUT Max 20A 20A 20A 15A 15A 20A 20A 20A Features POR, Soft Start Soft Start Soft Start UV Fault Mon UVLO on VCC P-Good each channel P-Good each channel Sync Input, P-Good Package SOIC-16 QFN-16, SOIC-14 QFN-16, SOIC-14 SOIC-8 SSOP-16 SSOP-28 SSOP-28 QFN-28, TSSOP-28

Integrated FET Devices

Device EL7531 EL7554 ISL6410 Description 1A Integrated FET Buck 4A Integrated FET Buck 0.5A Integrated FET Buck VIN Range 2.5V to 6V 2.5V to 6V 3.0V to 6V VOUT Range 0.8V to VIN 0.8V to VIN 1.8V, 1.5V or 1.2V IOUT Max 1A 4A 500mA Features Sync Input, P-Good P-Good, Soft Start P-Good, Sync Input Package MSOP-10, DFN-10 HTSSOP-28 MSOP-10, QFN-16

Power Management Devices

Device ISL6123 ISL6125 ISL6131 ISL6536 Description Low Voltage 4-Channel Sequencer Quad Power Sequencing Controller Multiple Voltage Supervisor 4-Channel Supervisory IC VIN Range 1.5V to 5V 1.5V to 5V 1.5V to 5V 2.5V to 5V VOUT Range IOUT Max Features UVLO, Adj. Slew Open Drain Outputs Package QFN-24 QFN-24
Adj. Voltage Thresholds QFN-24 Adj. UVLO, P-Good SOIC-8
Intersils Power Supply Solutions for Actel Families
Device A54SX08A A54SX16A A54SX32A A54SX72A Peak ICC Requirement (A) @ 100MHz 0.06 0.11 0.20 0.37 @ 350MHz 0.20 0.35 0.69 1.28 Recommended Intersil Power Solutions Single Output EL7536 for efciency or linears EL7536, EL7562, ISL6526 or ISL6520 Multi Output ISL6528, ISL6529 or linears ISL6402, ISL6528, ISL6529, ISL6227, ISL6521 or ISL6539
Device APA075 APA150 APA300 APA450 APA600 APA750 APA1000 Peak IDD Requirement (A) @ 100MHz 0.27 0.41 0.49 0.63 0.78 0.91 1.72 @ 250MHz 0.67 1.02 1.23 1.56 1.94 2.26 4.28 EL7554, EL7566, ISL6526 or ISL6520 EL7536, EL7562, ISL6526 or ISL6520 Recommended Intersil Power Solutions Single Output Multi Output
ISL6402, ISL6528, ISL6529, ISL6227, ISL6521 or ISL6539
Device AX125 AX250 AX500 AX1000 AX2000 Peak ICC Requirement (A) @ 100MHz 0.13 0.16 0.20 0.30 0.46 @ 500MHz 0.63 0.78 0.96 1.56 2.25 EL7536, EL7562, ISL6526 ISL6410 or ISL6520 ISL6402, ISL6528, ISL6529, ISL6227, ISL6521 or ISL6539 Recommended Intersil Power Solutions Single Output Multi Output

Four Output Voltages

Option 1: ISL6521 - Switcher for VCCINT and Linear Regulators for VCCIO1, VCCIO2, and VCCIO3.
Multi-output products that incorporate multiple switchers and/or linears in a single package are an excellent choice for many FPGA-based designs. These combination devices can provide all the voltages required from a single IC or board, and they can be adjusted to provide the optimum responses for the end application. Good layout and bypassing techniques (see Appendix 1) plus excellent on-chip isolation prevents the supplies from interacting. The ISL6521 can provide the required currents and voltages for the latest generation of Actel FPGAs (for example SXA, APA, and AX) in a 16-pin SOIC package with minimal external components. The ISL6521 implements a highly efcient synchronous buck design and in addition includes three linear regulators, which can provide additional voltages to the board. ICCIO currents less than 120mA can be supplied directly from the linear regulator drive pins (as shown here for VCCIO2) or they can be used to control an external transistor to supply currents up to 3Amps (as shown here for VCCIO1 and VCCIO3). The complete data sheet is available at http://www.intersil.com/products/deviceinfo.asp?pn=ISL6521. Simulation tools are also available at http://www.intersil.com/isim/. The example shown here has VCCINT = 1.5V and VCCIO1 = 2.5V, but all output voltages are programmable from 0.8V to 4.5V.

D1 MA732

ISL6521

VCCIO1 2.5V/3A

C11 10F

DRIVE2

Linear Regulator

C3 0.47F

R6 12.7k

R7 5.9k

(see table on next page)

VCCINT 1.5V/5A to 20A

VCCIO2 3.3V/120mA

C9 100F

C12 10F

DRIVE3 FB3

Switching Regulator

FB COMP

R8 18.2k

R9 5.9k

DRIVE4

VCCIO3

R3 2.26k

R11 R10

Figure 1. Highly Integrated ISL6521-Based Solution
For DDR Memory Power Solutions, see page 17.

Ease-of-Use Solutions

Option 2: +3.3V or +5V Solutions - EL75XX Family of Integrated Switchers and ISL6410/A
Intersils EL75xx family of highly integrated switching regulators require only 10 external components because the power FETs are integrated on the device. Input voltages of 3 to 6V are possible and continuous output currents of up to 6 amps are available (see table below). These products make a very compact, and >90% efcient solution for either VCCINT or VCCIO. Additionally, for +5V systems the 8A continuous output EL7558 is available. Component selection software, evaluation boards and Gerber les are available at http://www.intersil.com/products/ deviceinfo.asp?pn=EL7566.

R2 10K R1 21.5K

8200pF 0.047F

1 COMP

2 VREF
SGND 28 COSC 27 STN 26 STP 25 EN 24

EL7566

VDD 22 VIN 21 VIN 20 VIN 19 PGND 18 PGND 17 PGND 16 VIN (3V TO 6V) 100F
VOUT (2.5V, 6A) 2.7H 150F

VCCINT or VCCIO

Figure 2. 3.3V to 6V EL7566-Based Integrated Buck Solution
Figure 3. 6Amp EL7566 Eval Board (Actual Size)
Intersils Family of Buck Regulators with Integrated FETs
Part Number ISL6410 ISL6410A EL7534 EL7536 EL7532 EL7554 EL7566 EL7558 VIN Range 3.0V to 3.6V 4.5V to 5.5V 2.5V to 5.5V 2.5V to 5.5V 2.5V to 5.5V 3V to 6V 3V to 6V 4.5V to 5.5V VOUT Selectable 1.2V, 1.5V or 1.8V Selectable 1.2V, 1.8V or 3.3V 0.8V to VIN 0.8V to VIN 0.8V to VIN 0.8V to VIN 0.8V to VIN 1V to 3.8V IOUT 0.5A 0.5A 0.6A 1A 2A 4A 6A 8A Pkg/Pin MSOP-10, QFN-16 MSOP-10, QFN-16 MSOP-10 MSOP-10, DFN-10 MSOP-10, DFN-10 HTSSOP-28 HTSSOP-28 HSOP-28

C3 220uF

R2 4.32K

C7 12nF

R3 7.15K

D2 B320B

R4 2.87K

R5 23.2

C10 39nF

C11 1uF

220uF 10V 2EA

R6 1.35K

RETURN

C12 0.1uF

3.3VDC@0.50A
Figure 5. ISL6528 Schematic
Intersils ISL6528 incorporates an integrated soft-start feature that brings both outputs into regulation in a controlled and simultaneous manner. This feature ensures that the Actel FPGAs requirements for start-up are met. Each output voltage is monitored for undervoltage via the FB pins. If either of the outputs drops below 52.5% of the internal reference, both regulators will be shut down. Note that this is an internal setting of the ISL6528 and does not prevent the FPGA voltage from dropping below its specied range. An optional means of controlling the turn-on and turn-off is to drive the FB2 pin above 1.28V, causing both regulators to turn off. Releasing it will re-initialize the integrated soft-start feature. An additional feature in the ISL6528 is the internal Power-On Reset (POR), which initiates the soft-start only after the 5V input, exceeds its POR threshold. Conversely, when the 5V input drops below a threshold, the POR will disable both of the outputs in a controlled manner.
When designing the buck converter, particular attention has to be given to the selection of the switching power components, including Q2, D2, L1 and the output capacitors C8 and C9. Since this IC is operating at a frequency of 600kHz, switching losses for Q2 must be calculated to ensure that the overall power losses are acceptable. Also, the ripple current in the output capacitors must be considered to ensure a long life. For this design, the following power calculations validate the components selected:

Iout = 1.5 A

D = Vout
For 2.5V, this yields Irms to be 1.061A.

Irms = Iout D

From the datasheet for a Vishay Si3434DV MOSFET (selected for Q2), so and
Rdson =.050 Tfactor =1.Pconduct = Irms Rdson Tfactor Pconduct = 0.084W Pswitch = 0.5Iout Vin tsw fsw Pswitch = 0.225W Ptotal = 0.309W tsw is assumed to be 100ns for these calculations.

yielding

For the output choke, L1:

L = V dt

This yields a value of 6.94H calculated during the ON time. Since any powder iron core will exhibit a partial saturation with a DC current applied, this design will use a 10.0H choke from C&D Technologies. With the choke selected and the ripple current determined, the output capacitors (C8 and C9) can now be selected. A pair of 220uF, 10V capacitors from the Panasonic FK series are chosen. Note that this capacitor has a ripple current rating of 300mA. Calculating the actual ripple current in the two capacitors:

dt = D 1

di = 0.2 Iout

for 20% ripple.

Irms = di D / 3

Irms = 0.1225 A

Clearly showing more than adequate design margin. Finally, the freewheeling diode (D2) must be selected for the output stage. The B320B, a schottky diode from Diodes, Inc. was chosen in a SMB package with a current rating of 3A, a voltage rating of 20V, and Vf = 0.45V. To calculate the diode power:
Pdiode = Iout Vf (1-D) Therefore, Pdiode = 0.338W
With this simple design, based on the Intersil ISL6528, the power supply has a very low parts count and associated cost. The component details are shown in the Bill of Materials below.
Bill of Materials for Example #1
Reference C1 C2, C4, C11 C3 C5, C12 C6 C7 C8 C9 C10 D1 D2 Part 330uF 1uF 220uF 0.1uF 680pF 12nF 220uF 10V 220uF 10V 39nF BAT54 B320B Diodes Inc. B320B Panasonic EEVFK1A221P Panasonic EEVFK1A221P Panasonic EEVFK1A221P Manufacturer Panasonic EEVFK1A331P
Reference L1 Q1 Q2 R1 R2 R3 R4 R5 R6 U4 Part 10.0uH FZT649 Si3434DV 13.5K 4.32K 7.15K 2.87K 23.2 1.35K ISL6528 INTERSIL ISL6528 Manufacturer C&D Technologies 26100 Fairchild FZT649 Vishay Si3434DV
Example Application #2 An Efcient Design with Power Sequencing and Power-On Reset

Power Section

One of the newest additions to Intersils broad line of PWM controllers is the ISL6539, which incorporates two synchronous buck DC/DC converters to provide both high efciency and tight regulation. The ISL6539 is designed to operate in current mode utilizing an integrated feedback loop and input voltage feed-forward. This dramatically reduces the number of external components required simplifying the overall design while reducing board space and overall cost. Intersils ISL6539 incorporates an internal power-on-reset (POR) function which continually monitors the bias voltage on the VCC pin. This initiates soft start operation once the voltage exceeds 4.45V and the EN1 and/or EN2 pin is held high. When this voltage drops below 4.14V, the POR disables the IC. Additional features of the ISL6539 include built-in over-voltage protection which prevents the output from going above 115% of the set point, lossless over-current protection (OCP) which monitors the voltage drop across the RDS(ON) of the lower MOSFET, and synchronized operation in PWM mode. Utilizing the ISL6539, this design is capable of providing power to any member of Actels APA family of parts, including the APA1000. This circuit is powered from a single 5VDC source and provides two tightly regulated outputs of 2.5VDC at 4.0A and 3.3VDC at 2.0A. Additionally, the 5VDC is passed through to the sequencing circuit to provide an additional controlled output of 5.0VDC at 2.0A.

VINPUT 5.0 VDC

330uF 16V

4.7uF 10V

10 1/8W

5.0 V @ 2.0 A

B AT 54W

ISL 65 39

VIN GND.

1.0uF 100V

S i4920DY

0.15uF

VCC D DR.

0 0.15uF

3.3 V @ 2.0 A

0.01uF

BOOT1.

BOOT2.

U GATE1 U GATE2. PHASE1. ISEN 1. LGATE1. PGN D1. GND. VSEN1. PG1. EN1. SOF T1. PHASE2. ISEN 2. LGATE2. PGN D2. GND. VSEN2. PG2. EN2. SOF T2.

S i4944DY

C 14 L2

2.5 V @ 4.0 A

5.0 1/8

R 12 Q2B

5.0 1/4

4.7u F 1 0V

0u F 6.3 V

.001uF

.002uF

RE T URN

OCSET 1 OCSET 2. C 12

C 20 R 15

Figure 6. ISL6539 Schematic
One of the most important considerations in this design is the selection of the Power MOSFETs. These can be chosen once the RMS current has been established.

Vout1 = 3.3V

Iout1 = 2.0 A

Irms = Iout

Irms1 = 1.624 A
Irms1 = 1.166 A Irms 2 = 2.828 A
upper FET lower FET upper and lower FET

Irms = Iout 1 D

Vout 2 = 2.5V

Iout 2 = 4.0 A

Based on these values, the Vishay Si4920DY is chosen for the 3.3V output and the Si4944DY for the 2.5V output. The conduction power losses for these FETs will be:

Rdson1 =.025

so and

Rdson2 =.010

Tfactor = 1.4
Pconduct1 = 0.140W Pconduct 2 = 0.224W
Pconduct1 = ( Irms1upp + Irms1low ) Rdson Tfactor Pconduct 2 = ( Irms 2) Rdson 2 Tfactor
Since the selected parts are in an SO-8 package (two per package), which is capable of dissipating 0.7W in an elevated ambient environment, these are acceptable conduction losses. The output choke value is determined next using the following calculations. Note that for this example the goal is to have 10% ripple current in the output capacitors:

di = 0.1Iout

for 10% ripple.
This can be shown to yield the following values:

L1 = 17.9uH

L 2 = 10.2uH
So that for L1, a 22.0uH choke from C&D Technologies is chosen, with a minimum inductance specied to be 15.8uH. For L2, a 10.0uH choke from C&D Technologies with a minimum inductance of 7.3uH is chosen. Calculating for the worst-case ripple current in the capacitors using the minimum inductance gives the following:

di = V dt

Irms1 = 0.106 A Irms 2 = 0.228 A
With the choke selected and the ripple current determined, the output capacitors can now be selected. 150uF, 6.3V, low ESR capacitors from the Sanyo TPB series are chosen. Note that this capacitor has a ripple current rating of 1.7A at 45 degrees C, which provides more than adequate design margin.

Power Sequencing

The four channel ISL6123 power sequencing controller offers the designer full timing control of turn-on and turnoff sequences with supply monitoring, fault protection, and a system reset output. This is convenient for systems that require a particular sequence of power application and to ensure all supply voltages are in compliance prior to system turn-on and operation. Additionally, Intersils ISL6123 has a low-power standby mode when it is disabled, making it suitable for battery powered applications. In the following example, the ISL6123 is shown connected between the power supply rail voltages and the system load. Note that Actels APA family does not require a specic sequence of voltage application, only that the voltage rails assert and deassert together. However, this design is exible enough to accommodate other system components that may require specic sequencing. In this example, the rail voltages are sequenced to power up and down as follows:
VOUT 2.5 VDC 3.3 VDC 5.0 VDC 85% Nominal Setting 2.125 2.805 4.250 Actual Setting 2.115 2.781 4.268 ON Sequence 1st 2nd 3rd OFF Sequence 3rd 2nd 1st Nominal ON Delay* 13mS 29mS 61mS Nominal OFF Delay* 61mS 29mS 13mS
Actual setting based on nominal values of precision resistors * Nominal Delay is calculated by multiplying the capacitance value by 1.3 x 106
5.0 V @ 2.0A 2.5 V @ 4.0A 3.3 V @ 2.0A RE T URN
Q3A Si4920DY Q3B SI4920DY

J 2-1 J 2-2 J 2-4 J 2-3

5.0 V @ 2.0A 2.5 V @ 4.0A 3.3 V @ 2.0A

5 GATE_B

GATE_D

GATE_C

GATE_A
UVLO_A UVLO_B UVLO_C UVLO_D

DLY_OFF_D

VDD ENABLE

10 R23

SYSRST# RESET # GN D
DLY_OFF_C DLY_OFF_B DLY_ON_C DLY_ON_B DLY_OFF_A

J 2-6 J 2-7

PO R RE SET IN

DLY_ON_D

DLY_ON_A

.022uF

C23 C24

.047uF.047uF.01uF.022uF

Figure 7. ISL6123 Schematic

Each individual voltage threshold is programmed using external resistors. Once all voltages are above their respective UVLO levels and the ENABLE pin is asserted, the sequencing of the rail voltages begins. Sequencing and delay is determined by the selection of the capacitors connected to the DLY_ON and DLY_OFF pins, which are charged by an internal current source of 1uA. After the entire turn-on sequence has been completed and all GATEs have reached the charge pumped voltage, an internal 160ms delay is started to ensure stability. At the end of this delay, the ISL6123 deasserts the RESET# output which can be used as a system Power-On-Reset (POR) signal. The SYSRST# input, when asserted, immediately shuts down all outputs and asserts the RESET# signal. With the combination of Intersils ISL6539 Dual PWM Controller and the ISL6123 Power Sequencer, the FPGA designer has an efcient and exible power supply that can be easily tailored to many different applications. The complete list of components for this example is shown in the bill of materials below.
Bill Of Materials for Example #3
Item Qty Ref C1 C2 C3 C8 C18 C4 C13 C4 C14 C5 C6 C7 C17 C9 C12 C19 C1 C16 C25 C22 C24 C23 C26 C27 D2 D1 L1 Part 330uF 16V 4.7uF 10V 4.7uF 10V 4.7uF 10V 4.7uF 10V 4.7uF 10V 0.15uF 0.15uF 1.0uF 100V 1.0uF 100V 0.001uF 150uF 6.3V 150uF 6.3V 0.01uF 0.01uF 0.01uF 0.01uF 0.002uF 0.01uF 0.01uF 0.047uF 0.047uF 0.022uF 0.022uF BAT54W BAT54W 22uH C&D Technologies Manufacturer Vishay 94SVP337X0016F12 Taiyo Yuden LMK316BJ475ML Taiyo Yuden LMK316BJ475ML Taiyo Yuden LMK316BJ475ML Taiyo Yuden LMK316BJ475ML Taiyo Yuden LMK316BJ475ML Panasonic Panasonic TDK C4532X7R2A105M TDK C4532X7R2A105M Panasonic Sanyo 6TPB150MC Sanyo 6TPB150MC Panasonic Panasonic Panasonic Panasonic Panasonic 31 Item 16
Qty 4 Ref L2 Q1A Q1B Q3B Q3A Q4A 3 Q2A Q2B R3 R22 R10 R4 R5 R6 R7 R8 R14 R9 R11 R12 R13 R15 R16 R17 R19 RR18 R20 R23 U2 U3 Part 10uH Si4920DY Si4920DY Si4920DY Si4920DY Si4920DY Si4944DY Si4944DY 10 1/8W 10 1/8W 1.43K 5.0 1/8 26.7K 10K 10K 84.5K 1.30K 5.0 1/4 17.8K 86.6K 8.45K 2.49K 2.49K 2.49K 5.83K 14.3K 750 ISL6539 ISL6123 INTERSIL INTERSIL
Manufacturer C&D Technologies 41100 Vishay Vishay Vishay Vishay
Figure 8. Actel Evaluation Board Using Intersil ISL6539 and ISL6123 Power Management Solutions

Intersil Powers DDR Memory
Double Data Rate (DDR) Synchronous Dynamic Random Access Memory (SDRAM) is todays memory of choice for many applications. As its name implies, DDR SDRAM operates at a rate double that of previous-generation Random Access Memory (RAM). While previous SDRAM allowed one memory access per clock cycle, DDR SDRAM allows two memory accesses per cycle. Thus, data handling is faster and more efcient. In addition to the dramatic increase in data rate, DDR memory requires less power because it operates from a lower source voltage, 2.5V as compared to 3.3V of older SDRAM. Newer DDR-II memory operates at a further reduced voltage of 1.8V (VDDQ).
To utilize DDR memory, special power considerations have to be addressed. DDR memory requires three highly regulated voltages referred to as VDDQ, VTT and VREF. VDDQ is the main high-current supply. VTT is a memory bus termination voltage that is half VDDQ (VDDQ/2). VREF is a low-power reference voltage that tracks at half VDDQ and to which VTT is compared, where VTT = VREF. For DDR, the VDDQ supply is 2.5V and produces a high current to power the DDR memory ICs along with the clock synthesizer and the MCH IC core. Because of this, the VDDQ supply is usually a synchronous buck, PWM switching regulator. The VTT supply must source and sink current on the data lines. This is also best handled by a synchronous buck regulator since linear regulators and standard bucks cannot sink current.

ROCSET

VCC OCSET/SD

DBOOT1

UGATE1

PHASE1

CBOOT1

COUT1 Q2

LGATE1

VREF (.5xVDDQ)

VREF_IN VREF

ISL6531

DBOOT2

BOOT2 UGATE2

CBOOT2

PHASE2

DDR SRAM

LOUT2 Q4 COUT2

SENSE1

LGATE2 PGND2

SENSE2
Intersil has worked closely with industry chipFigure 9. Typical DDR Memory Power Solution set makers and DDR memory manufacturers to provide power solutions that supply all of the required voltages along with a full range of protection features. Whats more, Intersil has looked for opportunities to add value beyond the basic DDR memory power requirements. In so doing, Intersil now offers a selection of DDR memory power ICs that offer very high integration in small packages.

Intersils Power Supply Solutions for DDR Memory
Complete Solutions - VDD and VTT ISL6530 ISL6531 ISL6227 ISL6532/A ISL6534 ISL6539 Single Solutions for VDD or VTT ISL6520/A ISL6522/A ISL6527/A VIN +5V +5V 4.5V to 24V 2.5V to 5V, 12V 3.3V to 12V, 5V 4.5V to 15V VIN +5V 5V or 12V, 12V 3.3V to 5V Comments With VREF output Internally compensated VTT Automatic light/heavy load selection Includes standby LDO, ACPI compliant Includes standby LDO Dual PWM with DDR mode Comments Small, low cost 1%/0.5% regulation External ref input SOIC-8 SOIC-14, QFN-16, TSSOP-14 SOIC-14, QFN-16 Pkg/Pins SOIC-24, QFN-32 SOIC-24, QFN-32 SSOP-28 QFN-20/28 TSSOP-24, QFN-32 SSOP-28 Pkg/Pins
Power Converter Layout Considerations
Layout is very important in high frequency switching converter design. With power devices switching efciently at 300kHz or higher, the resulting current transitions from one device to another cause voltage spikes across the interconnecting impedances and parasitic circuit elements. These voltage spikes can degrade efciency, radiate noise into the circuit and lead to device over-voltage stress. Careful component layout and printed circuit board design minimizes the voltage spikes in the converters. As an example, consider the turn-off transition of the PWM MOSFET. Prior to turn-off, the MOSFET is carrying the full load current. During turn-off, current stops owing in the MOSFET and is picked up by the lower MOSFET. Any parasitic inductance in the switched current path generates a large voltage spike during the switching interval. Careful component selection, tight layout of the critical components and short but wide traces, minimize the magnitude of voltage spikes. There are two sets of critical components in a DC-DC converter. The switching components are the most critical because they switch large amounts of energy, and therefore tend to generate large amounts of noise. Next are the small signal components that connect to sensitive nodes or supply critical bypass current and signal coupling. A multi-layer printed circuit board is recommended. Figure 10 shows the connections of the critical components in an ISL6530-based converter. Note that capacitors CIN and COUT could each represent numerous physical capacitors. Dedicate one solid layer, usually a middle layer of the PC board, for a ground plane and make all critical component ground connections with vias to this layer. Dedicate another solid layer as a power plane and break this plane into smaller islands of common voltage levels. Keep the metal runs from the PHASE terminals to the output inductor short. The power plane should support the input power and output power nodes. Use copper lled polygons on the top and bottom circuit layers for the phase nodes. Use the remaining printed circuit layers for small signal wiring. The wiring traces from the GATE pins to the MOSFET gates should be kept short and wide enough to easily handle the required drive current.

Appendix 1

ISL6530

VCC GND CBP

+5V VIN

FB1 R4

C3A R3A

UGATE2

CBOOT2 Q3

LGATE2

FB1 The switching components should be placed close to the PWM controller C3B R3B (ISL6530 in Figure 10) rst. Minimize the length of the connections between the input capacitors, CIN , and the power switches by placing them nearby. SENSE2 Position both the ceramic and bulk input capacitors as close to the upper MOSFET drain as possible. Place the output inductor and output capaciKEY tors between the upper MOSFET and the load. The critical small signal ISLAND ON POWER PLANE LAYER components include any bypass capacitors, feedback components, and ISLAND ON CIRCUIT PLANE LAYER compensation components. Position the bypass capacitor, CBP , close to the VIA CONNECTION TO GROUND PLANE VCC pin with a via directly to the ground plane. Place the PWM controller compensation components close to the FB and COMP pins. The feedback resistors for both regulators should also be located as close as possible to Figure 10. Switching Power Supply Layout the relevant FB pin with vias tied straight to the ground plane as required.
Recommendations Using the ISL6530 as an Example
Power for a Typical Microprocessor-based System

CPU Power

HIP6301/HIP6601B HIP6302/HIP6602B ISL6402 ISL6406 ISL6558/HIP6601B ISL6560/HIP6602B ISL6559/HIP6602B ISL6569/HIP6602B ISL6556A/B, ISL6605 ISL6561, ISL6605 ISL6563 ISL6563A/B

DRAM Microprocessor

DDRAM Power

Core and Term.

ISL6520 ISL6520A/B ISL6522 ISL6530/31 ISL6532 ISL6532A/32B ISL6534 ISL6224 ISL6227A/26 IPM6210A

System Power Control

ISL6123 ISL6124 ISL6125 ISL6126 ISL6127 ISL6128 HIP1020

Supervisory

ISL6131 ORing ISL6132 FET ICL7665S Control ISL6536 ISL6144 ISL6550

FGPA/ASIC Power

ISL6521 ISL6227 ISL6520 ISL6526 EL7556 ISL6558 ISL6410/A
ISL6529 ISL6539 HIP6012 HIP6601BE ISL6522A ISL6563 EL7558B EL7536 EL7562 EL7554

FPGA/ASIC/ ASSPs

Hot Pluggable I/O Expansion

Hot Swap Protection

ISL6111 HIP1011 HIP1011D ISL6118 HIP1012A ISL6161 ISL6115/16