BQ25171-Q1: Non-Q1 version

Dice-K

Part Number: BQ25171-Q1
Other Parts Discussed in Thread: BQ25170, BQ25172,

Tool/software:

Hi support team,

Are there plans to release a non-Q1 version of BQ25171?

Regards,
Dice-K

0 Bill Johns over 1 year ago

Hi Dice-K

Dice-K said:
Are there plans to release a non-Q1 version of BQ25171?

No plans at this time.

We do have similar devices for LiIon / LFP, BQ25170 and NiMH, BQ25172

0 Dice-K over 1 year ago in reply to Bill Johns

Hi Bill,
Thank you for your reply.

I want to charge single AA Ni-MH battery.
For devices that have "Charge Enable", is the BQ25171-Q1 the best choice?

Best regards,
Dice-K

0 Bill Johns over 1 year ago in reply to Dice-K

Hi Dice-K

Take a look at the BQ25172, it is a NiMH charger similar to the BQ25171-Q1.

The TS pin can be used as Charge Enable by pulling to ground.

0 Dice-K over 1 year ago in reply to Bill Johns

Hi Bill,
Thank you for your reply.

Is this the method to use when battery temperature sensing is not required.
Is this possible with the diagram below?

Enable: above 85mV
Disable: below 40mV

I'm worried about the threshold being too small.

Best regards,
Dice-K

0 Bill Johns over 1 year ago in reply to Dice-K

Hi Dice-K

This is the right circuit.

But many customers are using a MOSFET to pull the pin low. Can be used with a 10k NTC, leakage current thru MOSFET is low.

If temp sensing is not needed NTC can be replaced with a 10k Resistor.

Yes the Enable threshold is small and a MOSFET under control of MCU or similar would work best.

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