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BQ24040: Current limit for charge current

Atsushi Takahashi
Expert 1415 points
Part Number: BQ24040
Other Parts Discussed in Thread: BQ25180

Do the following two device have a current limit for charge current(ICHG)?
If yes, is it user programmable?

<Device>
BQ24040
BQ25180

Best Regards,

  • 0
    TI__Intellectual 910 points

    Hello Takahashi

    Both the BQ24040 and the BQ25180 you are able to set a charge current.

    For the BQ24040 you will use the ISET, ISET2 pins. Using an external resistor, you are able to configure the ISET pin for 50mA (10.8K ohms) to 1000mA (540 ohms). The ISET2 pin has a 3 state input, It can be driven HIGH (500mA), LOW (ISET), or FLOAT (100mA). Also this IC does NOT require I2C or external host.  

    For the BQ25180 you will set it by using I2C protocol with an MCU Host and the ICHG_CTRL (ICHRG_6:0) register.

      

    V/R

    Rafael Camarillo