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Original question:

UCC2897A:

UCC2897A: Need of zero ohm resister

Navin Kumar2
Intellectual 380 points
Part Number: UCC2897A
Other Parts Discussed in Thread: PMP20878

In the schematic diagram of "Understanding and Designing an Active Clamp Current Mode Controlled Converter Using the UCC2897A", what is the use of zero ohm resister between VDD and PVDD. What will happen if I short them together? 

  • 0
    TI__Mastermind 27145 points

    Hi Navin,

    I suspect the 0Ω is likely there in case the designer wanted to implement an RC filter from VDD going to PVDD. It is acceptable to short VDD and PVDD together however. PMP20878 is one example where VDD and PVDD are directly connected together.

    Best Regards,

    Ben Lough