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Lithium-ion Battery Charger Four

2016-05-10 13:15  
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Lithium-ion  Battery Charger  Four
The ionicbond battery charger introduced in the example is made from 555 time-base intergrated circuit.This charger can automatically switch the constant current and voltage charging.That's to say,the charger uses constant charging when the battery's voltage islower than 4.2V and it adopts constant voltage and low current(60mA) charging mode when the battery's voltage reaches 4.2V so there is no overcharging. Circuit's Work Principle The lithium-ion battery charger is composed of power supply circuit,charging circuit and control circuit and it is showed as the picture 5-76.