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UCC2897A: Design Query

Naveen S
Prodigy 45 points
Part Number: UCC2897A

Tool/software:

Dear Experts,

Could you please tell me the purpose of D6 & D7.

  • 0
    TI__Mastermind 27355 points

    D6, D7 are the two rectifier diodes that are necessary for any forward converter output. D6 conducts in the forward direction (power transfer) and D7 conducts as a freewheeling diode (primary switch is in OFF state, similar to the switching behavior of a non-isolated buck converter). This is the correct configuration for the bootstrap bias winding to provide VDD/PVDD bias to the UCC2897A.

    Regards,

    Steve