Drive board test

Yuniy

When testing the drive board, after I power on the drive board, I give a PWM input. I give a PWM input at the 1 and pin pins of the UB6 chip, but no waveform appears at pin 3. The entire potential is pulled down, and the voltage value of Vgs at the entire output side is also pulled down. Can't get the result I want.

I/O port wiring status: pins 1 and 2 are connected to 12V DC power supply, pins 3 and 4 are connected to square wave signal with 0-5V cycle of 10us, and pins 11, 13 and 15 are connected to 5V signal.

Main problem: No waveform appears on the 3-pin pin of the UB6 chip.