BQ24721RHBT

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BQ24721RHBT is a power management integrated circuit (PMIC) used as part of a battery charging circuit. It is a highly integrated device used in various applications, such as automotive, industrial, and consumer markets. The device is designed to provide a total charge management solution from battery pack to system load, including monitoring and control of a battery pack\'s life cycle.

The device has three main capabilities: battery pack monitoring, charge control, and pack safety monitoring. It uses the power of smart feature integration to deliver high efficiency, higher power levels, and long lifetime for battery packs.

Application Field

BQ24721RHBT is used in a variety of applications where high power, high power efficiency and long lifetime are required, such as automotive, industrial, consumer and medical markets. The device is ideal for applications such as laptop/notebook battery charger, USB power adapter, portable power supply, and more.

It is also suitable for Li-ion, Li-phosphate, LiFePO4, NiMH and NiCd batteries. It is an ideal solution for consumer and medical applications including cordless phones, portable medical equipment and digital cameras.

Working Principle

The BQ24721RHBT is capable of charging any kind of battery that typically has two connections. It uses the common charging techniques that are used in most consumer grade chargers, namely the constant current, constant power and the constant voltage mode. In addition to these, it also offers adjustable charge termination, rcharge resume and precharge capabilities.

The BQ24721RHBT integrates a 16-bit ADCs to monitor the battery voltage and current. It also includes ADC based loop control of the battery charging current and voltage. This ensures a well regulated charge current with low ripple and a safe charging termination.

The integrated safety features such as the over-charge, over-discharge, open-circuit and short-circuit detections protect both the battery and the charger from damages. The device also provides an accurate 4-stage charge current level setting to meet different types of battery requirements.

The BQ24721RHBT also integrates system power management functions, such as over-voltage, current limit and thermal protection. The integrated buck controller provides fast transient response and high efficiency, while the system load is managed by the charge/discharge FET switching.

Conclusion

The BQ24721RHBT is an advanced PMIC used in various applications, such as automotive, industrial, and consumer markets. It integrates safety features to protect both the battery and the charger. The device is capable of charging any type of battery and provides adjustable charge termination, recharge resume, and precharge capabilities.

The device also offers system power management functions, such as over-voltage, current limit, and thermal protection. The integrated buck controller provides fast transient response and high efficiency while the system load is managed by the charge/discharge FET switching. The BQ24721RHBT is ideal for applications such as laptop/notebook battery charger, USB power adapter, and portable power supply.

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