Cxlb7213 is an integrated circuit that can manage the constant current / voltage charging of a single lithium battery. The inner part of the device includes a power transistor, which does not need an external current detecting resistor and a resistance diode. Cxlb7213 only needs a few peripheral components, which is very suitable for portable applications. The constant voltage charging voltage of cxlb7213 is 4.2V, with an accuracy of 1%. The charging current is set by an external resistance. The thermal modulation circuit can control the chip temperature in a safe range when the power consumption of the device is large or the ambient temperature is high. When the input voltage is powered off, the cxlb7213 automatically enters into the sleep mode of low power consumption, at this time, the battery current disappears
Consumption is less than 3 μ a. Other functions include low input voltage latch, automatic recharging, chip enable input, battery temperature monitoring and status indication.