BQ24271RGET Integrated Circuits (ICs)

The BQ24271RGET is a high-efficiency, ultra-low-power battery charger IC primarily used as an adapter charger for a single-cell lithium-ion battery pack. It is compliant with USB-C specifications and optimized for mobile devices such as smart phones and tablets. It is also suitable for applications such as home automation, wearables, medical, audio, and industrial instruments. The BQ24271RGET is capable of charging a wide range of cell types, including LiFePO4, LiPo, Li-Ion, and NiMH, as well as various chemistry types. The wide input voltage range allows for compatibility with USB-C sources ranging from 5V to 20V.

In addition, BQ24271RGET incorporates an NMOS transistor on the output side of the chip, which allows for high peak current and low quiescent current. The chip is also capable of outputting high continuous current, up to 2A. This makes it ideal for applications with small form factors and limited power sources, such as USB-C ports. The chip also features an intelligent power capability which allows it to detect when the power source is inadequate and increase the input current to compensate. The BQ24271RGET also integrates a high-efficiency buck converter, enabling charge current up to 2A.

In addition, the BQ24271RGET implements various safety features that guarantee safe and reliable operation. The device utilizes short-circuit protection and over-voltage protection, as well as over-temperature protection, in order to prevent damage to the battery or the device. The device also incorporates various safety timers to ensure proper charging is completed and suitable for different types of batteries. The BQ24271RGET supports trickle charging and pre-conditioning, allowing for safe and efficient charging of lithium-ion batteries. Lastly, the BQ24271RGET supports an adjustable termination voltage, allowing users to further customize the charging profile.

In terms of working principle, the charger chip includes a charge management system which controls the current, voltage and temperature of the device under charge. It first detects the input power and adjusts the charge current and voltage accordingly. The charge current is optimized based on the detected cell and chemistry type, as well as the current battery level. The charger then completes the charge cycle and terminates the charge when the battery has reached its limit. Once the charge is complete, the charger then enters sleep mode and waits for the next charge cycle.

Overall, the BQ24271RGET is an ideal charger solution for applications requiring a compact, efficient, and reliable charging solution. It is designed for applications such as mobile devices, home automation systems, wearables, medical equipment and audio equipment, allowing for a scalable and powerful source of performance and reliability.