Cxch76018 cxch76019 is a charge management chip specially designed for universal charger, which has the function of current limiting and constant voltage. It can charge single lithium-ion battery or lithium polymer battery. Cxch76018 cxch76019 is packaged with cob-8 and dip-8, with few peripheral devices of application circuit, suitable for portable application. The built-in polarity automatic discrimination circuit of cxch76018 cxch76019 can automatically detect the battery voltage and carry out polarity conversion in the IC. Cxch76018 cxch76019 has accurate reference voltage source, which can limit the charging voltage of 4.22v. The accuracy is 1%. When the charging voltage reaches the preset voltage, the IC charging process will automatically cut off to avoid high charging voltage and damage to the battery. Cxch76018 cxch76019 is displayed as a flow mode. During the charging process, LED1 ~ LED4 will flash in a flow state in turn. When the charging voltage is approaching the saturation voltage, the flash frequency will become faster; when the charging voltage is reached, cxch76018 cxch76019 will automatically stop charging. Cxch76018 cxch76019 LED drive mode is constant current drive mode, which can save the current limiting resistance in other ICs and reduce the cost. For details, please refer to the application guide.