BQ24751ARHDT

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BQ24751ARHDT is a high-efficiency, low-cost standby battery charger IC equipped with charge current and charge voltage possibilities suitable for any type of Li-polymer or Li-ion battery. It can address one or two cell battery stacks and provides a maximum charging current of up to 1.63 A. BQ24751ARHDT can be used to support battery backup mode and fast charging modes, providing the flexibility needed to address different application scenarios.

The BQ24751ARHDT has been developed to meet the requirements of portable devices, wearables, power banks, medical devices, and other consumer electronics. Its main goal is to lengthen the run time of devices powered by rechargeable Li-ion or Li-polymer batteries.

BQ24751ARHDT works by providing a constant current for the charging process, making it easier for bulk charging. As charging continues, BQ24751ARHDT switches to a constant voltage mode to avoid overcharging. When the battery reaches a predetermined voltage, the charger enters a stand-by state, ready to supply power to the system or device when needed. BQ24751ARHDT\'s power supply system is also designed to be efficient and reliable. It has an auto-coupled switch mode converter that helps reduce power consumption and an internal linear regulator that keeps the output voltage constant.

In its core, the BQ24751ARHDT uses two main power blocks - the PMOS gate driver, and the PMOSFET switch. The PMOSFET switch main purpose is to connect the power lines from the input to the output. The PMOS gate driver on the other hand, has the duty to control the duration of the on/off cycles of the input current in order to achieve the desired level of current output. With this block, the IC is able to switch between the constant current and constant voltage modes, allowing it to be used for both fast charging applications and low power standby application.

BQ24751ARHDT is highly compatible with a wide range of battery chemistries and different protection features, making it a versatile charger IC solution. It\'s compatible with both Li-ion and Li-polymer batteries and provides overcharge, over discharge, over current, over temperature and short circuit protections, ensuring the safety of both the battery and the device. Additionally, it\'s also compatible with Nano battery chemistries.

Overall, BQ24751ARHDT is the ideal power supply and charging solution for portable, wearable, medical and consumer electronic devices. Its high efficiency and low power losses, along with ample protection and safety features, make it an ideal choice for developers.

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