BQ27531-G1: Could you tell me why R25 is populated?

K.Yaita

Part Number: BQ27531-G1

Hi Team,

Regarding Figure 12, could you tell me why R25 is populated?
I believe R25 isn't required because the datasheet shows the following when external thermistor is used.

(datasheet page 11)
When an external thermistor is used, a 18.2-kΩ pullup resistor between the BI/TOUT and TS pins is also required.

over 4 years ago

0 Nick Brylski over 4 years ago

TI__Mastermind 19195 points

Hi Yaita,

R25 is required.

Best regards,

0 K.Yaita over 4 years ago in reply to Nick Brylski

Guru 29710 points

Hi Nick-san,

Thank you for your reply.
I understand R25 (1k ohm) is required.

Could you tell me where does the datasheet describe about the resistor?
I would also like to know why the resistor is required for my reference.

Best Regards,
Yaita

0 Nick Brylski over 4 years ago in reply to K.Yaita

TI__Mastermind 19195 points

Hi Yaita,

R25 is part of biasing network for TS pin.

Best regards,

Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

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BQ27531-G1: Could you tell me why R25 is populated?