BQ24600EVM: Charging current required is less than 2A

Richard Wei

Part Number: BQ24600EVM
Other Parts Discussed in Thread: BQ24600,

Hi All

I need to design a charger to charge a backup battery(6s li-ion 2AH). and I plan to use BQ24600.

One thing i have noticed in BQ24600EVM datasheet/guide is that minimum current is 2A. See photo below.

from what i understand from BQ24600 datasheet. i should be able to just swap the current shunt resistor from default 0.01 ohm to 0.1 ohm to get the charging current of 0.4A(0.2c of 2AH)

Can anyone help me to confirm if it's ok to replace 0.01ohm on BQ24600EVM to 0.1ohm to achieve 0.4A charging current?

Thanks

Richard

over 3 years ago

+1 Kedar Manishankar over 3 years ago

TI__Mastermind 24075 points

Hi Richard,

This charge controller is designed to fast charge battery. The part can charge at 0.4A, depending on the voltage sourced at ISET1 and the sense resistor used. Keep in mind, that the charge current accuracy might suffer, and the part could be constantly operating in DCM.

0 Richard Wei over 3 years ago in reply to Kedar Manishankar

Prodigy 20 points

Thanks Kedar

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BQ24600EVM: Charging current required is less than 2A