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BQ25792: BQ25792: Can it be used instead of BQ25723?

Star Xu
Genius 9645 points
Part Number: BQ25792
Other Parts Discussed in Thread: TPS65987D, BQ25723, , BQ25798

Hi

 The customer design a charging circuit with TPS65987D+BQ25723, but this combination could not use an external LED light to indicate the charging status.

The original design is to use TPS65987D to obtain PD protocol power supply, and then the I2C of 987D configures BQ25723 charging voltage/current

The design conditions are: controlled by 987D, the maximum power supply to BQ is 20V/3A, the minimum is 5V/1A; the battery charging voltage is 8.7V, and the maximum charging current is 5A.

Now under the same condition of using the 987D fast charging protocol chip,

They want to replace BQ25723 with BQ25792 and use VIN2 of 792 as input. Can it replaced?

Or are there any other recommendations for buck-boost chips with STAT status output?

Waiting for your reply.

Thanks

Star

  • 0
    TI__Guru**** 165776 points

    Hi Star,

    BQ25792 is recommend only for embedded battery applications.  I recommend changing to BQ25798 in battery will be removed/replaced.  BQ25798 package struggles to output more than 4A due to package heating up and entering thermal regulation.  If they can accept lower charge current, running at 750kHz with 2.2uH inductor then BQ25798 is a good choice.

    Regards,

    Jeff