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Original question:

UCC21732-Q1: four quadrant H-Bridge with 1.5kV part2

UCC21732-Q1: Half bridge invertor in UCC21732

Biruk Damitie
Prodigy 200 points
Part Number: UCC21732-Q1
Other Parts Discussed in Thread: UCC21732

Tool/software:

Hello Experts,

I am trying to simulate a half-bridge invertor in UCC21732 as follows (image attached). So, my questions are

  1. How is the connection of Rest Pin when we use two gate drivers ?
  2. Could you please correct me for circuit building of the invertor while we use UCC21732, because I did not get the proper result? and I'm just getting unrealistic results.


     
  • 0
    TI__Expert 6670 points

    Hi Biruk, 

    I'd recommend tying nRST/EN pin to VCC for now. 

    What's the purpose of R27/L1? 

    Also, my experience with PSpice is that half-bridge is difficult for PSpice - runs into convergence issue, etc. So I would recommend starting the circuit simple: driving capacitors with gate driver output, or only driving one power switch with one gate driver. Once it starts producing correct result gradually add onto that simple circuit. 

    Vivian