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Open source-JW5026 synchronous rectifier-step-down

Overview

JW5026 synchronous rectifier-step-down. The nominal maximum circuit of this circuit is 1A. I tested it at 600ma. If it is too large, it will burn the chip for a long time. It is best to use a large-volume inductor for this circuit, otherwise it will be easy to fry! The above is a step-down circuit. Support 40V input, step down to about 5V, test 500ma for a long time, no problem, the chip temperature rises 55 degrees, C5 and C4 are input filters, R3 is the IC work enable terminal, high level is active, C3 is the internal MOS driver Voltage capacitor, L1 is the step-down energy storage inductor, C1 and C2 are the output energy storage capacitors, R2 and R1 are the output voltage sampling voltage dividing resistors, and the output voltage can be changed by adjusting the resistance ratio.

Design Files

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Update:2025-05-08 15:13:34

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