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LM5146-Q1: LM5146 SPICE model not working HO pin is not generating voltage to drive high side MOSFET

Part Number: LM5146-Q1
Other Parts Discussed in Thread: LM5146, LM5145-Q1, LM5145

Hello There,

I have tried to simulate LM5146 in Pspice. As per my design calculation I have programmed IC. But high side drive is not functioning.


Please check  voltage as per bellow attached  schematic which is 1uV at HO pin.

Design specification :


  1. Vin 30V to 60V
  2. Vout:13.5
  3. IOut=23A
  4. Fsw=130KHZ
  5. IOut limit=30A
  6. Softstart time =18ms

I have done transient analysis as well.


I am not getting pulse on HO pin (blue colour) & getting initial 1 pulse at LO pin (Yellow colour) .


Kindly help to simulate the model.


Nitesh Modi