Problem phenomenon; Using STM32F303CCT6 PA6 chips PA7 PB0 as output, the output PWM signal to the motor driver chip MP6536, connection as shown in figure 1
Each output line through a 10 k resistor drop down to the ground


Beginning of chip output PWM signals is normal, as shown in figure 2


But use after period of time, the PWM signal is abnormal, the waveform shape can be seen, but the high level very low, obviously is not up to
As shown in figure 3

Please help analysis this problem is the reason why

CodePudding user response:

PB0 PA6 PA7, there is no need to answer the triode, received MP6536 again

CodePudding user response:

Directly connected to the MP6536, with 10 k resistor is among the drop-down

CodePudding user response:

Reduce the frequency point and see whether can adhere to for a longer time does not change, like somewhere to sex component in the middle, the unequal slowly is full of charge and discharge time

CodePudding user response:

The electric power, may be the cause of the circuit, still in check check circuit!

CodePudding user response:

Don't pick motor driver chip look first? Rule out the problem of motor driver chip down