TINA/Spice/UCC3895: ucc3895 TINA issue

Guangyan Liu

Part Number: UCC3895
Other Parts Discussed in Thread: TINA-TI,

Tool/software: TINA-TI or Spice Models

Hi team

I installed TINA-TI for simulation, but the problem happened on the ucc3895, the problem is: when I add a 1% PWM pulse in SYNC pin ,the system was stop, and pin CT without signal output , also the OUTA,OUTB.... I want to know whether ucc3879 cannot add the extra clock in SYNC , I had check the datasheet ,the Sync pin is bidirectional interface , that means I can use the external CLK ,use the SYNC as the input pin .

I had test that if I do not connect the external wave , the device performance is OK. When I connect the SYNC , the output will stop.

Can you help me to solve this isssue.

Thank you very much

Leon.Liu

over 5 years ago

0 Arpan Gupta over 5 years ago

TI__Expert 3140 points

Hi Guangyan,

Could you please attach your project (.TSC file) here? This will help us to analyse the issue.

Thanks & Regards,

Arpan Gupta

0 Guangyan Liu over 5 years ago in reply to Arpan Gupta

TI__Intellectual 2130 points

UCC3895_TINA-TI Reference Design_TSC.tsc

Thank you for your reply , Pls help me to analyze the issue

0 Arpan Gupta over 5 years ago in reply to Guangyan Liu

TI__Expert 3140 points

Hi Guangyan,

Looks like the circuit you made is not generating SYNC pulses properly. I have generated the SYNC pulses using a voltage source. With this we can observe CT signal is coming (shown below).

PFA the updated test bench 7725.UCC3895_TINA-TI Reference Design_TSC.tsc

Could you please confirm if the results are fine now?

Thanks & Regards,

Arpan Gupta

0 Guangyan Liu over 5 years ago in reply to Arpan Gupta

TI__Intellectual 2130 points

Hi Arpan

Thank you very much

I had got the reply from the customer , it had been solved .

BR,

Leon.liu

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TINA/Spice/UCC3895: ucc3895 TINA issue