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线性充电问题

Other Parts Discussed in Thread: BQ24076

目前正在看线性充电和开关充电有关内容,如果粗略一点,请问是否可以理解为这样?

线性充电=LDO+battery

开关充电=DC-DC  +battery

再一个  看到BQ24076的框图如下,请问充电的时候是VIN直接加到BAT上面么?  如果这样的话,USB是5V的电压,怎么充电?

请各位指点。