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Original question:

PMP9766: Bidirectional energy transfer function and negative current limit

PMP9766: High Efficiency

Wendy Wang1
Genius 11370 points
Part Number: PMP9766
Other Parts Discussed in Thread: TPS63020

Hi,

In the document of PMP9766, http://www.ti.com/lit/ug/slva726/slva726.pdf it says that it is "Small and high efficiency single converter solution" in section 6 Conclusion.

I'd like to know why it is high efficiency? How much is the efficiency?

Thanks&Best Regards,

Wenxiu

  • 0
    TI__Expert 7925 points

    Hi Wenxiu,

    This approach has high efficiency since the supercapacitor is charged and discharged using a switch-mode converter. In forward mode, the TPS63020 efficiency depends on the operating conditions (input/output voltage and output current, please see the datasheet), and is typically >90%. For the reverse mode the efficiency was not characterized, but since the converter still operates in switch mode it should be similar. Therefore, the charge-discharge efficiency should be around 80%.

    Best regards,
    Milos

  • 0
    TI__Expert 7925 points

    Hi Wenxiu,

    We haven’t heard back so we're assuming this answers your question. If not, just post a reply below, or create a new thread if the thread has locked due to time-out.

    Thanks and regards,
    Milos