BQ24130: Understanding minimum input voltage

Tomer Bruchiel

Intellectual 620 points

Part Number: BQ24130
Other Parts Discussed in Thread: BQ25798

Hi,

The data sheet states that the device can be operated from 4.5V to 17V.

In order to charge 3 cells (12.6V) do I need to supply at least 13.5V or will it work with 5V for example?

Thanks,

Tomer

over 1 year ago

0 Jeff F over 1 year ago

TI__Guru*** 146695 points

Hi Tomer,

The BQ24130 is a buck only charger so to charge 3 x 4.2V cells = 12.6V, the charger input must be at least ~13V. You might consider the BQ25798, which is a buck-boost converter and so it can charge from 5V input.

Regards,

Jeff

0 Tomer Bruchiel over 1 year ago in reply to Jeff F

Intellectual 620 points

Thank you Jeff,

I have considered the BQ25798 at first but it requires I2C to operate.

I would much rather a stand alone device.

Do you have a 3 cells (or more) Buck-Boost stand alone device?

+1 Jeff F over 1 year ago in reply to Tomer Bruchiel

TI__Guru*** 146695 points

Hi Tomer,

Unfortunately, no.

Regards,

Jeff

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BQ24130: Understanding minimum input voltage