10 "DC 3-30V 4A Ideal Diode Module RDS MOSFET Battery Charger Anti Reverse Connection Power Protection Board Module" just arrived today from Amazon and I decided to measure it to figure out what it really does. I tried to find a schematic but I couldn't find one. Here's one I reverse engineered that might have mistakes but it should mostly be there.
The capacitor is likely something small like 1uF. It uses something like this for BJT and two FDS4435 MOSFETs. I applied a 4V peak to peak sin signal on it and I get nothing in the output.
That's not how an ideal diode works and that's something to be aware of. With a tiny bit larger signal e.g. +/-2V5 sine wave it works as expected and you can also see the effect of the capacitor (under no load).
If you find the double-MOSFET setup a bit puzzling, here's some discussion on the topic.
No comments:
Post a Comment