Hi,
We have build the board based on circuit from 120W Evaluation board, now we have issue that the unit is working only when we give the external bias voltage once the unit started working if the bias removed also unit working until unless the load current drops to 0A. once the load reduced the unit will not switch ON.
The Values all are used as per the given EVM Module and transformer also from coil craft, what could be the reason?
Without the external DC Supply to the bias, the voltage across the bias varying 10 - 12V, due to this the device not getting turn-ON, reduced the Start-up resistor also not working.
