BQ24151AYFFR

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The BQ24151AYFFR is a current-limited, high performance, fast-charging and low power N-channel MOSFET integrated linear charger dedicated to portable applications. It provides a high efficiency battery charging and discharging control solution for applications powered by handheld batteries such as cell phones, MP3 players, and other portable devices.The BQ24151A also provides protection from short-circuits and over-voltage charging as well as fast and controlled charging of single Li+ Cells. It monitors and protects against thermal overload, discharge and battery over-discharge and automatically reduces the charging current when the battery is near full charge.The overall architecture of the BQ24151A consists of three sections: (1) input, (2) operational amplifier, and (3) output stage. The input section sources the DC input voltage coming from the wall plug adapter and matches it to the requirements of the charger. This includes reverse input voltage protection, as well as limiting the current and voltage that is fed to the system. It is also responsible for providing the necessary control signal (INPUT) to enable the system.The operational amplifier is a high-gain power amplifier that is used to control the output charging current. This includes detecting the current, setting the maximum current, and controlling the output voltage. Finally, the output stage consists of two independent N-channel MOSFETs that handle charging and discharging.The BQ24151A uses a constant voltage (CV) battery charging algorithm, which allows the user to safely charge the battery to a predetermined voltage level. In addition, the charger is designed to provide a safe, fast and efficient charging experience for a single Li+ cell. It also incorporates a number of smart protections such as over current, over voltage and charge time limit.Moreover, the BQ24151A is designed to be highly efficient, consuming low power through efficient power management. The high efficiency power management allows the system to reduce power dissipation, which significantly reduces heat generation while ensuring maximum available charging current. Furthermore, the BQ24151A also contains a 0.3A/1A high-side switch, which enables switching between low current and high current operation.In summary, the BQ24151A is a high performance, low power N-channel MOSFET integrated linear charger which provides a high efficiency battery charging and discharging control solution for use in a number of applications such as cell phones, MP3 players, and other portable devices. It is designed to provide a safe, fast, and efficient charging experience while protecting against short circuits and over voltage charging. The BQ24151A is also highly efficient and incorporates a number of protection features to ensure that the battery is safely charged and discharged.

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