The waveform on the EN pin shows a stepped shape, as shown in the attached figure.
Is this behavior acceptable, or is it a problem?
Do you have any suggestions for improvement, and what could be the possible cause?
When I change the pull‑up resistor from 10 kΩ to 1 kΩ, the waveform changes.
However, due to the drive capability of the control IC, there is a limit to how small I can make the pull‑up resistor.
Pull up Register change 1kΩ
I am evaluating multiple units of the device, and I have observed that some of them show disturbed output‑voltage waveforms, as shown in the attached figure. Because of this, I believe that the stepped behavior appearing on the EN pin must be addressed.
Ch1:EN1 Ch2:VOUT1,2,3
When I change the pull‑up resistor on the EN pin to 1 kΩ, the disturbance in the output voltage disappears; however, I do not consider this to be a fundamental solution.
