sawwa7 Posted May 6, 2005 Report Posted May 6, 2005 hi all i have a computer power supply (ATX) that have a faulty PWM IC this IC has a strange part number printed on it in two rows : 2003 BAZ37430407H i need a data sheet or pin-out for this IC with 16 pin DIP and if there's any other equivalent of the well known kinds it'd be highly appreciated . please help if u do have any info and where can i find it online to buythanks in advance Best Regards Quote
hotwaterwizard Posted May 6, 2005 Report Posted May 6, 2005 I have an ATX Schematic.ATX_psu_schematic.pdf Quote
sawwa7 Posted May 6, 2005 Author Report Posted May 6, 2005 hi hotwaterwizardthanks alot for ur reply trying to help me :)i've already had those schematics and more , the problem is that most of the schematic i have found online using the 494 chip or equivalent , but the one i have here do have different IC with strange number and different pin-outs .. i mean not pin to pin equivalent to the 494 chip .. this is my problem .if i can get more infor about it , it'd be easy to make any modifications using available parts .thanks alot Best Regards Quote
sawwa7 Posted May 7, 2005 Author Report Posted May 7, 2005 hi hotwaterwizard thanks again for all the help u try to give , but all the the schematics here are based on the 494 chip or equivalents pin to pin which is different from my chip on this power supply .. here's another more information i've got from the board of the power supply and hope it'll help more :i got some more information that may help idenfifying this IC this atx power supply model is : LC-B350ATXwith the following outputs :+3.3V@28A+5V@35A+12V@16A[email protected][email protected]+5V SB@2Aalso i found this printed on the components side of the power supply unit :Y-B200ATXVer: 3.1 the pinouts of the IC that i could figuer out were :Pin 1= VccPin2 connected through 3.5K resistor to the green wire for PS-ONpin7= output 1 to the switching transistorsPin8 = output 2 to the switching transistorsPin9 = PG ( power Good)pin 12= GNDhope this will help more in identifying this PWM controle chipthanks in advanceBest Regards Quote
sawwa7 Posted May 13, 2005 Author Report Posted May 13, 2005 hi all colleaguesi've got the pinouts of this IC and now i need a replacement or equivalent for this one or where on line can i buy this onethanks in advanceRegards Quote
sawwa7 Posted May 15, 2005 Author Report Posted May 15, 2005 hi allplease guys help to find replacement for this IC .. what replacement or equivalent i can use?where i can get this IC from on line store?what part number should i use to order ?please help if u can thanks in advanceBest regards Quote
sawwa7 Posted May 15, 2005 Author Report Posted May 15, 2005 hi allyet again i have another atx power supply using the same chip to control it and the common thing is the number 2003 .. i have this chip with that printed on it in two rows also :2003BAZ42860403Ethat means the part number is 2003 but what does this mean?any idea please ?Best Regards Quote
hotwaterwizard Posted May 16, 2005 Report Posted May 16, 2005 Here is the datasheet for 2003The first one is AllegroThe second is ST2003.pdfULN2003A.pdf Quote
sawwa7 Posted May 18, 2005 Author Report Posted May 18, 2005 hi hotwaterwizard thanks for all the help u try to do for me .. unfortunatly this is not my IC .. mine is DR-B2003 it's a pwm + supervisory .. atx power supply IC .. the problem it's unavailable here so i need a replacement or equivalent for this IC or where from i can get it?thanks alot Best Regards Quote
cm Posted May 26, 2005 Report Posted May 26, 2005 Hi sawwa7,Like you I am looking for information for this chip. It appears that you have a schematic of a PS with this chip or you have the datasheet. Can you post it here. Thanks.CM Quote
sawwa7 Posted May 26, 2005 Author Report Posted May 26, 2005 hi cm well , i don't really have a data sheet but have a circuit diagram contains this IC which is working in an ATX computer power supply and has both the PWM controller and supervisory section merged into this IC .. the problem is i can't find it .. any equivalent or replacement or even one supplier ???i'll upload the circuit i have and hope u can find any replacement or supplier .. please post if u do find anybest regards Quote
cm Posted May 27, 2005 Report Posted May 27, 2005 I tried hunting for two weeks before I saw your post. Most power supply companies are Taiwanese though their factories are in China. And they like to buy products from Taiwanese companies. There are many small Taiwanese companies producing very specialized niche products to support the local scene. As such, I started looking at Taiwanese sites. This link is the closest I could find. No other luck so far. http://www.manufacturers.com.tw/electronics/pwm-controller.htmlCM Quote
sawwa7 Posted May 27, 2005 Author Report Posted May 27, 2005 hi cm thank u for ur response .. i've already do many searches online and came across this System General company and already got an account .. they also offer a free samples but not for this IC ( pin to pin).they do have a very good collection of power managements ICs and some of them already used in some atx power supplies.best regards Quote
phanvanngay Posted March 20, 2006 Report Posted March 20, 2006 NOW I REPAIR POWER SUPPLY ATX Y-B200ATX VER:3.1, I WANT CHANGE 5V TO 7V.BUT I HAVEN'T DATA SHEET 2003 BA42952054, LET'S SEND FOR ME, IF YOU HAVE, THANHKS[email protected] Quote
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