BQ24721CRHBTG4

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Not For New Designs
Battery Chemistry:	Multi-Chemistry
Number of Cells:	3 ~ 4
Current - Charging:	--
Programmable Features:	Current
Fault Protection:	Over Current
Charge Current - Max:	--
Battery Pack Voltage:	19.2V (Max)
Voltage - Supply (Max):	24V
Interface:	I²C
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	32-VFQFN Exposed Pad
Supplier Device Package:	32-VQFN (5x5)
Base Part Number:	BQ24721

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Introduction

The BQ24721CRHBTG4 one-cell lithium-ion/polymer battery charger is a highly advanced, programmable device with integrated safety features. It is designed to charge single-cell Li-ion or LiPo batteries. This battery charger is suitable for a variety of IoT, wearable, and other applications where battery charging and power dissipation management is important. The safety features of the battery charger provide a safe charging environment for the battery, preventing any accidental fires or damage to the battery.

Features

The BQ24721CRHBTG4 offers a variety of features that make it suitable for a wide range of applications. It has an adjustable charging current for different types of batteries and battery sizes. The end current threshold can be adjusted to ensure the battery is charged properly and not over-charged. Additionally, the battery charger can monitor the battery\'s SOC (state of charge) during the charging process, and will automatically stop the charging process when the battery is fully charged. It also has an integrated reverse current protection feature, ensuring that the battery is not damaged due to over-current flows. The BQ24721CRHBTG4 also offers a variety of integrated Power Dissipation Management (PDM) features. These features help to reduce the power dissipation of the charger when the input voltage is higher than the battery voltage, or when the charging current is higher than the battery capacity. The PDM features also include a thermal protection circuit that shuts off the charger if the temperature of the charger exceeds its safety level. The BQ24721CRHBTG4 is a highly advanced battery charger, with a variety of integrated safety features and a wide range of adjustable parameters for different types of batteries.

Application

The BQ24721CRHBTG4 is an advanced battery charger that is suitable for applications such as mobile phones, portable electronic devices, medical systems, and industrial equipment. The wide range of adjustable parameters makes it an ideal battery charger for a variety of different applications. The safety features of the BQ24721CRHBTG4 ensure that the battery is not damaged during charging, and the wide range of adjustable parameters make it suitable for different types of batteries and different battery capacities. The integrated PDM features help to reduce the power dissipation of the charger and ensure safety during charging.The BQ24721CRHBTG4 is also suitable for renewable energy systems, where the solar power is converted to charge the battery. The adjustable charging current and end charging threshold ensure that the battery is optimally and safely charged. Additionally, the integrated power dissipation management features ensure that the battery is not accidentally damaged due to over-current flows.

Working Principle

The BQ24721CRHBTG4 is designed to charge single-cell Li-ion or LiPo batteries. It uses a low-side switch to control the current flow from the input to the battery. When the input voltage is greater than the battery voltage, the low-side switch is activated, allowing the current to flow from the input to the battery. The BQ24721CRHBTG4 tracks the actual battery voltage and uses this information to control the charge current and voltage of the battery. The internal microcontroller continuously monitors the battery’s status and makes adjustments to ensure that the battery is optimally and safely charged.The BQ24721CRHBTG4 also integrates several power dissipation management features. These features help to reduce the power dissipated by the battery charger, which can lead to a longer lifespan for the battery. Additionally, the safety features of the BQ24721CRHBTG4 include several over-current protection, reverse current protection and thermal protection features, which prevent any damages to the battery caused by accidental over-current flows.

Conclusion

The BQ24721CRHBTG4 is a highly advanced battery charger, with a variety of integrated safety features and a wide range of adjustable parameters for different types of batteries. It is suitable for a variety of applications including mobile phones, portable electronic devices, medical systems, and industrial equipment. The safety features of the battery charger provide a safe charging environment for the battery, and the wide range of adjustable parameters make it ideal for different types of batteries and different battery capacities. The integrated PDM features help to reduce the power dissipation of the charger, and the reverse current protection and thermal protection features help to prevent any accidental damage to the battery.

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