BQ25713: BQ25713 efficiency at 8A output.

Allen Gao

Expert 7080 points

Part Number: BQ25713
Other Parts Discussed in Thread: BQ25731,

Hi team,

What is the efficiency at 8A output when Vin=20V, Vout is around 9V?

Datasheet efficiency curve is only up to 6A

Thanks!

over 4 years ago

0 Tiger Zhou over 4 years ago

TI__Mastermind 33205 points

Hi, Allen,

The output current may be limited due to 10-mohm current sense. BQ25731 is a new part and supports 5-mohm current sense. It provides ~96% charge efficiency at 9A. See datasheet efficiency curve Figure 8-4.

https://www.ti.com/product/BQ25731

0 Allen Gao over 4 years ago in reply to Tiger Zhou

TI__Expert 7080 points

Hi Tiger,

Customer already selected BQ25713. they need efficiency to guide their test.

BQ25731 efficiency is more higher than BQ25713 in datasheet at 0~6A.

BQ25713 @20V input/6A output is ~94%, 20V/8A should be lower 94%.

Do we have BQ25713 completely efficiency data? Under 10mohm , it still can charge at 8.1A.

Thanks!

0 Tiger Zhou over 4 years ago in reply to Allen Gao

TI__Mastermind 33205 points

BQ25713 is a charger controller, which means the efficiency depends on external MOSFET, inductor and current sense resistors. In BQ25713EVM, we only tested the charge current up to 6A with 10-mohm. My suggestion is to reference to the new part or new design, which offers better efficiency.

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BQ25713: BQ25713 efficiency at 8A output.