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About TPS65023 Loop Gain ,Phase marjin

masa0301
Intellectual 960 points
Other Parts Discussed in Thread: TPS65023

Hi

Could you tell me how to measure Loop and gain margin at TPS65023?

My customer no use FB resistance. Use default output voltage.

If can measure, please let me know pace to measure

Best Regards

  • 0
    TI__Genius 16870 points

    Hi, 

    You can break the feedback loop at the VDCDCx pin. If you break the your loop between the Vout and VDCDCx pin to inject your noise here, the response can be taken accurately. It is also suggested that you do a transient response test on the output too. 

    However, you change to use the DEFDCDC pin as the resistor divider feedback network that it can be, you must break the loop between the top resistor and Vout. Then, leave VDCDCx shorted to the output. 

  • 0 in reply to Michael Green
    Intellectual 960 points

    Michael Green

    Thank you for your  answer!

    Best regards

    masa0301