Huawei GAQ03S24 24V Isolated DC-DC Power Module Teardown: 72W 1/4-Brick Design Analyzed
Compiled by Best IT Parts from public industry reporting
This teardown examines the Huawei GAQ03S24 isolated DC-DC power module in a non-standard 1/4-brick form factor. The module accepts a 36–75V DC input (nominal 48V) and delivers a regulated 24V/3A output (72W). The analysis reveals a Texas Instruments LM5025A active-clamp PWM controller paired with ON Semiconductor FDMS2572 and Vishay Si7322DN primary MOSFETs, and Vishay Si7540DP and FDMS2572 synchronous rectifiers. The module employs an integrated planar transformer design with SMT components on both PCB sides, minimizing thickness to 9.2 mm. Output voltage regulation uses an STMicro TS951ILT operational amplifier for feedback through an LITEON LTV-217-B optocoupler. Input overvoltage, output overcurrent, short-circuit, and over-temperature protection are all built in. An essential reference for IT parts distributors and repair professionals sourcing isolated DC-DC converter modules for server, telecom, and industrial power applications.
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Technical details are reproduced as reported. Verify specifications against the original source before design or procurement decisions.