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- The module must be used together with the ground, and the input terminals must not be reversed without reverse protection.
- The module cannot replace the freewheeling diode in a switching power supply, but it can be used to prevent backflow at the output end.
When the module operates with high current, it is necessary to pay attention to heat dissipation. It has been tested for 10A without heat dissipation measures (12V 25 ° C), but due to the small size of the module, it is still in a relatively hot state.
- When working at a low voltage of around 3V, the internal resistance of the module will be too high, so the current that can be passed will be less than the test value at 12V
- The measured minimum voltage drop of the module is about 53mv, and it will not drop to 0 due to low current.
joe
Reviewed in the United States on January 24, 2025
MOSFET is too small for the job
Ken J.
Reviewed in the United States on March 4, 2024
I'm by no means an expert in the field of electronics, so take my findings here with a grain of salt.Using a 9VAC/1000ma adapter (see photo), I found this module to output an identical voltage (~4.86VDC) to a half wave rectifier as assembled on a breadboard. Note: This particular 9VAC supply puts out closer to 11VAC, unsure if this is typical of AC/AC adapters.For a DC input test, I connected my bench supply's leads to the board's input, and set the supply to output 9.00V. From here, I measured the board's output voltage to be 8.94V. I also tested the input coming from the bench supply here with a DMM, which showed 8.99V being delivered from the supply. This appears to corroborate the listed minimum voltage drop in the 50mv region, though I have yet to test under load conditions, and at voltages outside of 9V.I'll continue playing around with these and report back with any interesting findings.
Vile Lizard
Reviewed in the United States on March 4, 2024
These modules are essentially an "active rectifier" using a MOSFET and a little IC that controls it, allowing current flow in one direction only.It's a neat trick, but not a drop-in replacement for a rectifier diode, since it needs a ground reference in addition to the usual "anode" and "cathode" terminals. The feasibility of this will vary with the application.It does, however, do what it says on the tin.
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