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bq25504EVM



请问这个芯片的vstor是接输出,vbat是接充电原件的吗?怎么样调节他输出3.3v,100ma左右的电压,能指导下吗

  • VBAT是接电池,没有错。

    关于电池充电环节的控制,请查看数据手册的第13页:BoostConverter,ChargerOperation(VSTOR >VSTOR_CHGN

    andVIN_DC>VIN(DC)-MIN)

       Input voltageregulation is obtainedbytransferring chargefrom the input to VSTOR onlywhenthe input voltageis higherthan the voltageonpinVREF_SAMP.Thecurrentthrough the inductor is controlledthrough internal currentsensecircuitry.Thepeakcurrentin the inductor is ditheredinternally to set levels to maintainhighefficiencyofthe converteracrossawideinput currentrange. Theconverternominally transfers upto aaverageof100mAofinput current. Theboostconverter is disabledwhenthe voltageon VSTORreaches the OVconditionto protectthe batteryconnectedatVBATfrom overcharging.

  • 当输入电压高于VREF_SAMP的电压(当VSTOR没有超过OV电压时),开始充电。充电电流是内部电路进行调节的。而充电的截止电压是利用电阻调节的,见公式3.