BQ34Z100-G1: 1.2V single cell NiMH monitoring

Frans Kanters

Part Number: BQ34Z100-G1

Hi,

Is it possible to use the BQ34Z100-G1 part with a single cell 1.2V NiMH battery, using some scaling of the voltage (e.g. by changing ADC reference voltage) and a step-up converter to provide power to the chip?

Best regards,

Frans.

over 7 years ago

0 Onyx Ahiakwo over 7 years ago

TI__Guru* 76230 points

Hi Frans,
You do not need to scale the voltage, although you need the step-up to provide power to the IC

Just set the number of cells to 1 and program the correct chem id.

thanks
Onyx

0 Frans Kanters over 7 years ago in reply to Onyx Ahiakwo

Prodigy 50 points

Hi Onyx,

Thanks for your reply. If I understand correctly, the normal internal scaling is optimized for 4.5V max.

Will the measurement be more accurate if I would scale my 1.5V max to 900mV, or is the difference small?

Best regards,

Frans.

0 Bryan Kahler over 7 years ago in reply to Frans Kanters

TI__Mastermind 25955 points

Hi Frans,

You're correct - you will still need to use a voltage divider on the cell to bring the max voltage to 900 mV.

Sincerely,
Bryan Kahler

0 Frans Kanters over 7 years ago in reply to Bryan Kahler

Prodigy 50 points

Thanks for your replies!

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BQ34Z100-G1: 1.2V single cell NiMH monitoring