BQ25100: How to set Battery charging current ?

Hello,

current setting method:

pin function in the datasheet:

ISET B2 I Programs the fast-charge current setting. External resistor from ISET to VSS defines fast charge current value. Recommended range is 13.5 kΩ (10 mA) to 0.54 kΩ (250 mA).

Setting method and calculation:

8.3.6 ISET

An external resistor is used to Program the Output Current (10 to 250 mA) and can be used as a current monitor.

RISET = KISET ÷ IOUT (1)

Where:

IOUT is the desired fast charge current;

KISET is a gain factor found in the electrical specification

For greater accuracy at lower currents, part of the sense FET is disabled to give better resolution. Going from

higher currents to low currents, there is hysteresis and the transition occurs around 50 mA.

The ISET resistor is short protected and will detect a resistance lower than ≉420 Ω. The detection requires at

least 50 mA of output current. If a “short” is detected, then the IC will latch off and can be reset by cycling the

power or cycling TS pin. The OUT current is internally clamped to a maximum current of 600 mA typical and is

independent of the ISET short detection circuitry.