Other Parts Discussed in Thread: PMP9253
Hi,
we use LM5022 as flyback, the input is 7.5V to 57V, output is 5V/1A, reference to PMP9253.1,
The transformer is the same with reference design.
the question is, when input is 9V and load current is 0.5A, output is 5V; when input is 7.5V and load current is 0.5A, the output is about 3V, We measured the VCC of LM5022, only about 6V, which can't reach to normal work voltage for LM5022.
below is customer schematic, the PMP9253.1 is design for 9V, but I don't know why 7.5V can not work.
Could you help on it? thank you
