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LM5148: EN hysteresis function

Part Number: LM5148

Tool/software:

Hi,

I'm using LM5148 to design a 48V input, 24V output circuit with dual-phase, PFM setting.

EN hysteresis does not work as expected.

So I have two questions.

One is about the formula for calculating hysteresis.

The other is about the EN voltage fluctuating at light loads in the PFC setting.

Please refer to the PDF file of the documentation.

lm5148_en_hysteresis_function.pdf

Best regards