UCD3138: Why does UCC3138 not require bus current sampling?

Tom Tom

Part Number: UCD3138

Tool/software:

We know that PFC inputs generally require rectified DC voltage, bus voltage, and bus current. Why does UCC3138 not require bus current sampling?

0 Ning Tan over 1 year ago

You captured the AC current sensing block already. Please read the schematic thoroughly.

0 Tom Tom over 1 year ago in reply to Ning Tan

if the PFC inductor connect FET, the ac current is not bus current.

0 Ning Tan over 1 year ago in reply to Tom Tom

Please see the schematic above.

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