It's a 3V Lithium battery. A microcontroler generates pulses of less than 1ms to drive the power MOSFET (Si7450DP). I would need some type of level shifter to rise the level of the pulses to about 5V. I think it's possible to make it with a pair of PNP transitors and a few resistors but I was not able to do yet:|
Some idea?
u can try boot-strap method,
u need a dioe & a cap, which two is connected in series to the output node, and the middle point is the level shifting voltage u need![/code]
Thanks Btrend, I tried with a bootstrap circuit and it works but it may fail in some situations. Whatever I already found a power mosfet that match my requeriments without any special cicuitery