Tool/software:
Hi team,
My customer is experiencing a phenomenon that appears to be a malfunction, and I would appreciate your confirmation.
With a normal unit, the output operates correctly up to 24V/5A. However, with a transferred unit, a RESET occurs at around 24V/50mA.
I have attached the waveforms for both the normal operation and the abnormal operation.
the normal operation
the abnormal operation
After changing the resistance values in the surrounding circuit on the customer's board as shown below, the operation recovered to match the normal waveform:
- 20kΩ → 3.3kΩ
- 270kΩ → 300Ω
- 7.5kΩ → 4.7kΩ
The attached circuit diagram reflects the resistance values after the changes.
Questions:
- Although the operation improved after changing the resistance values, what could be the possible cause of this issue?
- Are there more optimal resistance values that could be considered?
Best regards,
Kyohei