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LM5155-Q1: Flyback topology

Link Huang
Intellectual 1085 points
Part Number: LM5155-Q1

Hi expert,

In the flyback topology of the LM5155-Q1, the internal power dissipation of the device can be decreased by supplying the VCC using an additional transformer winding. Is this additional transformer winding power supply circuit necessary? What would be the impact if not?

BR,

Link