4 ms·
A diode will drop about 0.5-0.6 volts, which could eat 10% of your energy, so reverse polarity protection is usually used in devices where someone could plausib
by marshray 11y ago
A diode will drop about 0.5-0.6 volts, which could eat 10% of your energy, so reverse polarity protection is usually used in devices where someone could plausibly install the batteries backwards. I think it's probably rare on something on a highly controlled standard connector like USB.
- rrmm 11y agoIt's fairly easy to do it without the diode drop if you use a mosfet, but you do incur the cost of a more expensive part.