Did today again some testing, connected 2 phases to a power resistor (8 Ohm). Supply voltage is 20 V, sou current could not exceed 2,5 Amps. But again when i open the MOSFET the board gets instantaneously really hot (the resistor not even a bit). My code is below. I also tested the circuit with a single MOSFET (IRF3205) and the MOSFET stayed cool and the resistor got hot how it should be.
The board consumes about 1.2 watts and gets a bit warm on standby. I think its around the voltage regulator so maybe its normal.
#include <Arduino.h>
void setup() {
pinMode(PC13,OUTPUT);digitalWrite(PC13, LOW);
pinMode( PA8,OUTPUT);digitalWrite( PA8, LOW);
pinMode(PA12,OUTPUT);digitalWrite(PA12, LOW);
pinMode( PA9,OUTPUT);digitalWrite( PA9, LOW);
pinMode(PB15,OUTPUT);digitalWrite(PB15, LOW);
pinMode(PA10,OUTPUT);digitalWrite(PB10, LOW);digitalWrite( PA8, HIGH); //1PhaseH
digitalWrite(PA12, HIGH); //2PhaseL
delay(1000);
digitalWrite( PA8, LOW); //1PhaseH
digitalWrite(PA12, LOW); //2PhaseL
}
void loop() {}