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LM5158: LM5158 PWM cycle time

Part Number: LM5158

Tool/software:

Hi, Staff

I'm designing boost convertor.

Vsupply range is from 25.5V to 46.0V

Vload range is from 47.05V to 49.96V.(Typ. 48.5V)

Target Fsw is about 500KHz.

In Vsupply is 46.0V and Vload 47.05V, PWM Duty is 3.25%. and then, Ton is 66.4ns.

In PWM freq. 500kHz, Min. Ton TIme is 125ns.(LM5158 Datasheet Page 11)

When RTreg is fixed(45.3kohm), Can LM5158 shift PWM cycle time to slow automaticaly?

Since the waveform was disiplayd in WeBench, I thougt it coule work.

BR, Katsuya