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BQ24725A in Power Bank

Max Tribunsky
Prodigy 10 points
Other Parts Discussed in Thread: BQ24725A

Hi, i want use BQ24725A in my design of power bank. Battery 3s2p. Question is - can BQ24725A charge with DC 5V input voltage and charge 12.6v battery pack ? And if answer is - no, what kind of power supply i need to use. In datasheet sets AC supply, can i use a DC? Can you help to pick correct controller.

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    TI__Mastermind 19430 points

    The bq24725A uses buck topology, thus input voltage needs to be higher than the output voltage.

    In your case, the battery regulation voltage is 12.6V, so you will need a 20V adpater/power supply.

    AC refers to AC adapter which has DC output.