The cxlb7355 is a single lithium battery charge management chip that can be powered by solar panels. The inner part of the device includes a power transistor, and no external current detection resistor and resistance diode are needed for application. The internal 8-bit analog-to-digital conversion circuit can automatically adjust the charging current according to the current output capacity of the input voltage source. The user does not need to consider the worst case, and can maximize the current output capacity of the input voltage source, which is very suitable for the charging application of lithium battery powered by the voltage source with limited current output capacity such as solar panel.
Cxlb7355 only needs a few peripheral components, and conforms to the USB bus technical specifications, which is very suitable for the field of portable applications. 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. The internal fixed constant voltage charging voltage is 4.2V, which can also be adjusted by an external resistance. The charging current is set by an external resistance. When the input voltage is powered off, the cxlb7355 automatically enters the sleep mode of low power consumption, and the current consumption of the battery is less than 3 microamps. Other functions include low input voltage latch, automatic recharging, battery temperature monitoring and charging state / end state indication.