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BQ25756: BQ25756 bidirection output requirement

user6108086
Prodigy 10 points
Part Number: BQ25756
Other Parts Discussed in Thread: BQ25758

Tool/software:

Application requirement:

DC side: DC 9V~60V

Battery Side：1~14cell LiOn battery

Mode:

1. Charger mode: 9~60V DC input, charge to 1~14cells battery, Charge current need to be adjustable from 0~20A

2. Bidirection output, 1~14cells input, DC 9~60V output. The current of battery can be contain with adjustable.

Can it be achieved? 

  • 0
    TI__Genius 16960 points

    Hello,

    Yes, this is possible with the BQ25756. With the BQ25756, you'll need to use a digital potentiometer to control the battery feedback voltage. You can use I2C commands or a potentiometer to adjust the charge current.

    Since you have such a large voltage range, you can also use the BQ25758 DC-DC converter. The 758 can vary the output voltage and output current through the help of I2C commands.

    Let me know if you have any other questions about this.

    Best Regards,
    Ethan Galloway