Schematic Diagram of Computer Power Supply Unit ATX, AT, laptops
PSU Schematic Diagram, circuit diagram, Service manual. Wiring for ATX power supply connectors (ATX12V) with ratings and color coding of wires:
| Power Master 250W model LP-8 ver 2.03 230W (AP-5-E v1.1) | Download |
| Power Master 250W модель FA-5-2 ver 3.2 | Download |
| Maxpower PX-300W on SG6105D chip | Download |
| PowerLink (Linkworld) 300W LPJ2-18 on LPG-899 chip | Download |
| JNC 250W model lc-b250atx on a chip 2003 | Download |
| PowerMan IP-P550DJ2-0 on W7510 chip | Download |
| LWT 2005 on LM339N and KA7500B chip Schematic Diagram | Download |
| Power Master 250W model AP-3-1 on TL494 chip | Download |
| ATX-310T model ATX-300P4-PFC on TL494 and LM339 chip | Download |
| PowerMan 350W model IP-P350AJ on W7510 chip | Download |
| ATX-P6 Schematic Diagram | Download |
| PowerMan 450W model IP-S450T7-0 | Download |
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ComStars 400W model KT-400EX-12A1 on a UC3543A chip circuit |
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Green Tech 300W model MAV-300W-P4 on TL494CN chip and WT7510 circuit |
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Dell 280W PS-5281-5DF-LF model L280P-01 on TNY278, UC3843BN and PS222 circuit |
Download |
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Krauler ATX-450 450W on TL3845, LD7660, WT7510 circuit |
Download |
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SevenTeam ST-200HRK on LM339, PWM UTC51494, UC3843AN circuit |
Download |
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Enermax 200W on PWM TL494 circuit |
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Dell 350W PS-6351-1DFS model L350P-00 on TNY267P, UC3843BN, PS224 circuit |
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Dell 305W PS-6311-2DF2-LF model L305-00 on TNY267P, UC3843BN, PS224 and 11N90C circuit diagram |
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Dell 250W PS-5251-2DFS on TNY267P, UC3845BN, TSM111CN and field switch 2SK2611 circuit |
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Dell 230W PS-5231-2DS-LF on TNY266P, UC3843BN, PS222S and FQA9N90C field workers circuit diagram |
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Dell 160W PS-5161-7DS on PWM controller UC3845GN and field switch 2SK2654 circuit |
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Dell 160W PS-5161-1D1S on TNY267P, UC3843BN, TSM111CN and field switch 2SK2654 circuit |
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Dell 145W SA145-3436 on PWM UC3842, LM358N and IFRBC30 field circuit |
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| SevenTeam ST-230WHF on LM339, PWM TL494 circuit diagram | Download |
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Power Mini P4, Model PM-300W. Main PWM SG6105 circuit |
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SPS-1804-2(M1) and SPS-1804E(1) on TL494CN chip circuit |
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ShenShon 400W model SZ-400L and 450W model SZ450L, duty station on C3150, PWM AT2005 circuit |
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iMAC G5 A1058, APFC on 4863G, duty station on TOP245YN, main power supply on 3845B circuit |
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PowerMan 350W model IP-P350AJ2-0 ver.2.2 on GM3843, W7510 and ICE2A0565Z circuit |
Download |
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PowerMan 450W model IP-S450T7-0 rev: 1.3 on 3845, WT7510 and A6259H circuit |
Download |
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AUVA VIP P200B 200W on TL494 circuit |
Download |
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CWT CWT-235ATX 235W MAX on UTC34063, KA7500B and LM393 circuit |
Download |
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PM30006-02 ATX 300W 230V 80PLUS on SG6931, SG6516, SG6858 chips circuit |
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TND359-D 255W ATX 80 PLUS-certified, on NCP4302, NCP1396A, NCP1654, NCP4302, PS223, NCP1587, NCP1027, LM393 chips |
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| Part of the CoolerMaster 460W RS-460-PCAP-A3 power supply circuit on WT7527, UC3843, TNY277NP circuit | Download |
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Shido LP-6100 ATX-250WCorsair 1200W AX1200i part of the circuit on 3843B and ICE3BS03LJG circuit on TL494 and LM339 circuit |
Download |
| Corsair 1200W AX1200i part of the circuit on 3843B and ICE3BS03LJG circuit | Download |
| Universal power supply 70W for laptops 12-24V, model SCAC2004, EWAD70W board on LD7552 chip circuit | Download |
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PSU 60W 19V 3.42A for laptops, KM60-8M board on UC3843 chip circuit |
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| Delta ADP-36EH for laptops 12V 3A, on DAP6A chip and DAS001 circuit | Download |
| Li Shin LSE0202A2090 90W for laptops 20V 4.5A, on NCP1203 and TSM101 chips, AKKM on L6561 circuit | Download |
| Delta ADP-30JH 30W for laptops 19V 1.58A, based on DAP018B chip and TL431 circuit | Download |
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Delta ADP-40PH ABW circuit diagram |
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| HP Compaq CM-0K065B13-LF 65W for laptops 18.5V 3.5A, model PPP009H-DC359A, based on UC3842 and LM358 circuit | Download |
| NB-90B19-AAA 90W for laptops 19V 4.74A, based on TEA1750 circuit | Download |
| Lite-On PA-1121-04CP on LTA702 circuit | Download |
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Delta ADP-40MH BDA (Part No:S93-0408120-D04) on DAS01A, DAP008ADR2G circuit |
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19V 4.74A on LTA301P, 103AI, PFC assembled on TDA4863G/ FAN7530/ L6561D/L6562D circuit |
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Delta ADP-90SB BB AC:110-240v DC:19V 4.7A on DAP6A, DSA001 or TSM103A circuit |
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Delta ADP-90FB AC:100-240v DC:19V 4.74A on L6561D013TR, DAP002TR and DAS01A circuit |
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Lite-On PA-1211-1 AC:100-240v DC:12.2V 17.25A on LM339N, L6561, UC3845BN, LM358N circuit |
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Li Shin LSE0202A2090 AC:100-240v DC:20V 4.5A 90W on L6561, NCP1203-60 and TSM101 circuit |
Download |
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Universal power supply Gembird NPA-AC1 15V/16V/18V/19V/19.5V/20V 4.5A 90W on LD7575 circuit |
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Delta ADP-60DP AC:100-240v DC:19V 3.16A on TSM103W (M103A) and I6561D circuit |
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| Delta ADP-40PH BB for laptops 19V 2.1A on DAP018ADR2G chip and STP6NK60ZFP field circuit | Download |
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Asus SADP-65KB B AC:100-240v DC:19V 3.42A on DAP006 (DAP6A) and DAS001 (TSM103AI) circuit |
Download |
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Asus PA-1900-36 AC:100-240v DC:19V 4.74A on LTA804N and LTA806N circuit |
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Asus ADP-90CD DB AC:100-240v DC:19V 4.74A on DAP013D and field switch 11N65C3 circuit |
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Asus ADP-90SB BB AC:100-240v DC:19V 4.74A on DAP006 (DAP6A) and DAS001 (TSM103AI) circuit |
Download |
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LiteOn PA-1900/05 AC:100-240v DC:19V 4.74A on LTA301P and 103AI, PFC 2SK3561, 2SK3569 circuit |
Download |
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LiteOn PA-1121-04 AC:100-240v DC:19V 6.3A on LTA702, 2SK3934, SPA11N65C3 circuit |
Download |
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Delta ADP-90FPB AC:100-240v DC:19V 4.74A on L6561D013TR, DAP002TR and DAS01A circuit |
Download |
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Dell 01XRN1 model DA65NM111-00 AC:220v DC:19.35V 3.34A on DAP023F and MAX2850 circuit |
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Power supply AC:90-240v DC:19V 3.42A on TOP258EN circuit |
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Dell PA-12 model HA65NS2-00 AC:220v DC:19.5V 3.34A on FA5528, DS2501 and TSM103A circuit |
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PSU for tablets DSA-0151A-05A AC:200-240v DC:5V 2.4A for K2141 and K2996 circuit |
Download |
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Hipro HP-0K066B13 AC:220v DC:19V 3.42A on FA23842 and LM358 circuit |
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PSU KS-70WZC1A on LTA201P and TSM103A circuit |
Download |
| Dell PA-1900-02D AC:100-240v DC:19.5V 4.62A on L6562 and 103AIW circuit | Download |
LiteOn PSU Schematic Diagram. PCB Layout
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LiteOn PS-5281-7VW on UC3843, FQA9N90C, TNY277PN and PS224 circuit |
Download |
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LiteOn PS-5281-7VR1 on UC3843BN, TK07H90A, TNY277PN, PS224U circuit |
Download |
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LiteOn PS-5281-7VR on UC3843BN, FQA9N90C, TNY277P, PS224U circuit |
Download |
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LiteOn PE-5161-1 on MB3759 (aka TL494) and LM393 circuit |
Download |
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LiteOn PA-1201-1 on L6561, UC3845BN, LM393 circuit |
Download |
| LiteOn PA-1061-0 12V 5A on LTA809FA (SG6741), TSM103WAID circuit | Download |
DTK PSU Schematic Diagram. PCB Layout
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DTK PTP-2038 200W on TL494 and LM393 circuit |
Download |
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DTK PTP-3518 200W on TL494 and LM393 circuit |
Download |
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DTK PTP-3018 230W on TL494 and LM393 circuit |
Download |
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DTK PTP-2538 250W on TL494 and LM393 circuit |
Download |
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DTK PTP-2518 250W on TL494 and LM393 circuit |
Download |
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DTK PTP-2508 on TL494 and LM393 circuit |
Download |
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DTK PTP-2505 250W on TL494 and LM393 circuit |
Download |
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DTK PTP-2068 200W on UC3843 and LM393 circuit |
Download |
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DTK PTP-2028 230W on TL494 and LM393 circuit |
Download |
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DTK PTP-2008 200W on TL494 and LM393 circuit |
Download |
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DTK PTP-2007 200W on TL494CN and LM393N circuit |
Download |
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DTK PTP-2005 200W on TL494 and LM393 circuit |
Download |
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DTK PTP-2001 200W on TL494 and LM393 circuit |
Download |
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DTK PTP-1568 on UC3843 and LM393 circuit |
Download |
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DTK PTP-1508 150W on KA3843 and LM393N circuit |
Download |
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DTK PTP-1503 150W on KA3843 and LM393N circuit |
Download |
| DTK PTP-1358 on KA3843 and LM393N circuit | Download |
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Structure and operating principle
A typical ATX computer power supply circuit is shown below. By its design, this is a classic pulse-type power supply unit, based on the TL 494 PWM controller. The signal to start the operation of this element comes from the motherboard. Until the control pulse is generated, only the standby power supply remains active, delivering a voltage of 5V.
Rectifier and PWM controller
To make it easier to understand the structure of the computer power supply and the principle of its operation, you need to consider the individual structural elements. It's worth starting with a mains rectifier.
The main task of this unit is to convert alternating mains current into direct current, which is necessary for the operation of the PWM controller, as well as the standby power supply. The block includes several main parts:
- Fuse F1 - necessary to protect the power supply from overload.
- The thermistor - it is located in the neutral line and is designed to reduce electrical current surges that occur when the PC is turned on.
- Interference filter - it consists of chokes L1 and L2, capacitors C1-C4, as well as Tr1, which have an opposing winding. This filter allows you to suppress interference that inevitably arises during the operation of a switching power supply, which can negatively affect the operation of television and radio equipment.
- Diode bridge - located immediately behind the interference filter and allows you to convert an alternating current into a constant pulsating one. To smooth out pulsations, a capacitive-inductive filter is provided.
At the output of the mains rectifier, voltage is present until the power supply is disconnected from the outlet. In this case, the current flows to the standby power supply and the PWM controller. It is the first structural element of the circuit that is presented in the figure.
It is a low-power pulse-type converter. It is based on the T11 transistor, whose task is to generate power pulses for the 7805 chip.
The basis of any pulse-type converter is a PWM controller. In the example under consideration, it is implemented using the TL 494 microcircuit. The main task of the PWM (pulse width modulation) module is to change the duration of voltage pulses while maintaining their amplitude and frequency. The resulting output voltage on the pulse converter is stabilized by adjusting the duration of the pulses generated by the PWM controller.
Raúl (Saturday, 02 March 2024 14:25)
Olá.
Muito obrigado.
Janusz (Tuesday, 06 February 2024 23:29)
Than