Hello,
a while back I designed with the help of you a H-Bridge that as far as I remember worked well. Now I tried to power it back up again, and saw that it was shorting somewhere. It was powered by my power supply, which went into constant current as soon as I supplied the circuit.
I attached the circuit below. I disconnected the inductor, so that the drain's are kept open. Also (what I think the problem is) the oscillator inputs are open/floating. The circuit is powered by a 20kHz square wave 0-3.3V.
I think the problem is that Q4 and Q1 are driven at the same time. But I don't understand how that is possible.
Why is it drawing every current possible when the oscillator pins are floating ? And how can I fix it ?
-8
a while back I designed with the help of you a H-Bridge that as far as I remember worked well. Now I tried to power it back up again, and saw that it was shorting somewhere. It was powered by my power supply, which went into constant current as soon as I supplied the circuit.
I attached the circuit below. I disconnected the inductor, so that the drain's are kept open. Also (what I think the problem is) the oscillator inputs are open/floating. The circuit is powered by a 20kHz square wave 0-3.3V.
I think the problem is that Q4 and Q1 are driven at the same time. But I don't understand how that is possible.
Why is it drawing every current possible when the oscillator pins are floating ? And how can I fix it ?
-8
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