UCC5350: Why is the simulation result of UCC5350 incorrect?

Tom Tom

Other Parts Discussed in Thread: UCC5350

The attached diagram is the UCC5350 circuit diagram and simulation result diagram. Why is the output always negative voltage?

5 months ago

0 Will Appelt 5 months ago

TI__Expert 3965 points

Hello,

The output may not be switching due to the input waveform signal being 3.3V. The datasheet states that the max positive-going input threshold is 0.7*VCC1, which in this case would be 3.5V. So try increasing it to 5V and let me know if that works. If it does not, please attach a new waveform with the CLAMP pin disconnected and a differential voltage probe on the input signal referenced to GND1.

Best regards,

Will

+1 Tom Tom 5 months ago in reply to Will Appelt

Intellectual 530 points

Thanks a lot !

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UCC5350: Why is the simulation result of UCC5350 incorrect?