BQ25100AYFPT

Introduction
BQ25100AYFPT is a widely used battery charge controller designed by ON Semiconductor. This device is part of PMIC (Power Management IC) family, it mainly focuses on charging for Li-ion battery, especially for the battery packs. This device is not only efficient but also has advanced safety features, it uses microcontroller for the charging process, and its main function is to maintain the safety of the battery.
Application Fields
The BQ25100AYFPT is mainly designed for single-cell lithium-ion battery charging and power management, with power up to 30 watts. The low voltage input range of the device (2.2 V to 5.5 V) makes it ideal for many types of applications in solar and automotive fields, including electric bicycles, solar garden lights and electric scooter, etc. It also can be used in personalized handhled equipments, such as mobile phones, game consoles, and Medical devices.
Principle of Working
The BQ25100AYFPT operates on the constant-current /constant-voltage (CC/CV) principle for charging Li-ion batteries. The device is primarily responsible for the maintaining of safety and accuracy during the charging process. At first, the device decides an accurate charging rate based on the preprogrammed parameters. After that, current and voltage are monitored and adjusted during the charging process as required. It even has a built-in algorithm which is able to detect the thermal conditions during the charging and automatically adjust the output power accordingly. The LED indicates the status of the charging process, and it will be in the default state when the device is connected to the battery. During charging, the LED will flicker and indicate the current charging mode. The device also includes internal safety features like input overvoltage protection, output overvoltage protection and thermal protection. This device is also unique in that it automatically puts itself into a low-power sleep state when the battery is fully charged, making it extremely power efficient.
Conclusion
In conclusion, the BQ25100AYFPT is a high performance charge controller, which is mainly designed for Li-ion batteries and power management. In addition to its advanced safety features, the device is also highly efficient and can work up to 30 watts of power. It is widely used in a variety of applications in the automotive, solar and electronic fields, and it can also be used in personal equipment such as mobile phones, game consoles and medical devices.