Dear all,
I have found a soft-start problem on the 2817 device.
The soft-start start well only when the controller is already supplied on the Vcc pin.
When the 2817 is directly supplied fron the line the sof-start is disable, and the pwm start causing voltage overshooting.
I have put a delayed time circuit on the OVP/EN pin remedying the problem.
Someone found a similar problems?
Thank in advance,
Regards
Ivo