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AT and ATX PC computer supplies schematics

On this page i collect the schematics of switching supplies for Computers (SMPS) ATX v 1.0, ATX v 2.0 and some AT, which i found on internet. I'm not the author. The author is noted usually directly in the schematic.


Schematics of halfbridge ATX (AT) supplies with TL494, KA7500
ICs TL494 and KA7500 are equivalent. The letters of 494 can differ. Theese supplies use bipolar junction transistors (BJT) of NPN type.

Schematic of AT 200W w/ TL494

ATX Shido 250W, TL494

Microlab 400W, KA7500B

ATX, IC= TL494 (output power=?)

230W Key Mouse Elekctronic

PC SMPS AT, cca 200W

old AT, cca 200W

Sunny Technologies AT 200W

Codegen ATX 250W - 250XA1

Seven Team ST-230WHF 230W

JNC Computer LC-250ATX

SevenTeam ATX2V2 with TL494

PowerMaster FA-5-2, 250W

PowerMaster LP-8, 230W

SevenTeam ST-200HRK 200W

Green Tech MAV-300W-P4

DTK-PTP-2038 200W ATX

Codegen Atx 300W

ATX LWT2005 china, KA7500B

Delta DPS-200PB-59 H

Alim ATX 250W SMEV J.M 2002

ATX (values missing)

Power Efficiency electronic (-//-)

Old AT smps (values missing)

unknown AT

Wintech PC WIN-235PE

MaxPower ATX PX-230W

DTK Computer PTP-2007 Macron

PC ATX EC Model 200X

ATX-300P4-PFC (passive PFC)


Schematics of halfbridge ATX PC supplies with SG6105.
Schematics of ATX switching supplies with SG6105. Theese supplies use bipolar junction transistors (BJT) of NPN type.

Schematic of ATX 250W with SG6105

ATX M-TECH

MaxPower PX-300W ATX

300W ATX schematic diagram

PowerMan IW-ISP300A3-1 PFC

Nuitek 330U - ATX 330W


Schematics of halfbridge ATX PC supplies with KA3511
Supplies ATX with KA3511 integrated circuit. Theese supplies use bipolar junction transistors (BJT) of NPN type.

ATX 145W 145-60SP schematic

FSP Group Inc. 145-60SP


Schematics of halfbridge ATX PC supplies with DR B2003
ATX PC SMPS's with DR B2003, marked as 2003. Theese supplies use bipolar junction transistors (BJT) of NPN type.

JNC Computer co. LC-B250ATX

JNC Computer co. Y-B200ATX


Schematics of othed halfbridge computer supplies.
ATX switching supplies with DR B2002 (marked 2002), AT2005 (2005) and its equivalents LPG899 and WT7520. Theese supplies use bipolar junction transistors (BJT) of NPN type.

LC Technology inc. LC-A250ATX w/ 2002

Powerlink LPJ2-18 300W, LPG-899


Schematics of forward topology ATX supplies with UC3842, 3843, 3844, 3845 and other
ATX supplies using forward topology with single switch or double switch (half-controlled bridge). Transistors are MOSFETs. Control IC's are UC3842, 3843, 3844, 3845 or other IC's, which are a combo for boht supply and active PFC controll like ML4824, FAN480X and ML4800.

DPS-260-2A, ML4824, act.PFC

ATX - two switch forward, PFC

two switch forward + PFC, FAN480X

two switch forward + PFC with ML4800

incomplete IP-P350AJ2-0,
UC3843, 350W

UTIEK ATX12V-13 600T, UC3843

ATX CWT PUH400W two
switch forward, UC3845

Sunny technologies co. ATX230,
230W, singe switch, UC3843

ATX w/ PTP-2068,
singe switch, UC3843

ATX 350T - 350W, UC3842

Sunny technologies ATX-230
2SK2545, UC3843

ATX with STW12NK90Z, UC3843

API3PCD2-Y01, two switch
forward, missing values




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