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BQ24297: bq24297 input current limit set with external resistor

Nicole Han
Intellectual 2230 points
Part Number: BQ24297

Hi, team,

We are using bq24297, because part of the adaptor current is for other use, so we want to limit the input current to be around 1.7A~1.8A. However, register setting doesn't have it, so we have to use external resistor, however, KILM has a very wide range. Here if we use 250ohm,

KILM=395，158A；

KILM=435，1.74A；

KILM=475，1.9A，

If we want to play it safe to set 1.8A when KILM=475, that means most of time we couldn't use the maximum charging current. 

Thanks!

 

 

不过也是可以的，寄存器配置为2A输入限制

  • 0
    TI__Guru 57541 points

    ILIM pin may set the current limit you need. KILIM max =475 should be used when calculating the x input current limit. e.g. If ILIM has a 316-Ω resistor to ground for 1.5 A, the input current limit is 1.5 A. Thanks.