recently trying to make a led strip that can be controlled over bluetooth. I need high currents up to 10A. for the test purposes I implemented the circuit above. and instead of leds I used 12 volts halogen capsule bulb, because led strip that draws 10 amps is very long. one of these capsules draws 1.6 amps and I connected 7 of them parallel. when I connected it directly to the power supply, it draws about 10 amps.
but the question is when I connect them to the mosfets drain, mcu instantly get burns. I am using nrf52810 SOC. the interesting thing is I have 2 more channels with the exact same circuit and both works fine. I tried to change bulbs, didn't work. what could be wrong with my circuit.
I am doing the test with the 0% duty and 100hz pwm signal. mosfet should be fully conducting.
ps: It works with low currents like 3A.