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Questions for BQ24650 battery charger with 10A

xunpel
Prodigy 50 points
Other Parts Discussed in Thread: BQ24650

HI,

    I have designed the 10A Mppt controller unit with BQ24650. The unit's efficiency is over 91%. and all charging functions are great.  But I found some questions.For example, The BQ24650 operation circuit is 2mA with the 2A charging current, but the BQ24650 operation circuit is 60mA with the 10A charging current. On account of the larger operation circuit, the IC(BQ24650) is very hot when the unit is charging the battery.

   I think the mosfets are the voltage control components,  the mosfets aren't effected by the loading current. So I have a question, why is the BQ24650 operation circuit  larger with the 10A charging current?

Best regards.