Dear,
Now we use the DRV102 to driving a soleniod valve so as to down the voltage during hold phase.
we have a question is that there is a undesired 1kHz PWM signal but not a On/Off signal need to connected to the DRV102 input Pin(Pin1) to control the output of DRV102, we captured the input and output waveform as belwo figure:
The waveform shows that the frequency of DRV102 output is according to the input signal also is 1kHz, meanwhile, adjusting for Rpwm is no use for output waveform, obviously, the internal PWM generater not working in this scenario. However, the 1kHz output signal still working for valve driving and voltage discreasing feature.
So, could we use the DRV102 in this scenario? is there any uncertain risk for the input signal out of Spec? as we can not find any information in the datasheet that input signal of DRV102 is compatible with 1kHz PWM.