BQ24190RGET Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	1
Current - Charging:	Constant - Programmable
Programmable Features:	--
Fault Protection:	Over Current, Over Temperature, Over Voltage
Charge Current - Max:	4.5A
Battery Pack Voltage:	4.2V
Voltage - Supply (Max):	17V
Interface:	I²C
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	24-VFQFN Exposed Pad
Supplier Device Package:	24-VQFN (4x4)
Base Part Number:	BQ24190

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BQ24190RGET Application Field and Working Principle

The BQ24190RGET is a single-channel boost charger from Texas Instruments that can be used to charge and directly power a lithium-ion or lithium-polymer battery. It is a switch-mode charger, meaning that it can generate the constant voltage, and sometimes constant current, required for charging a battery efficiently, in a high-frequency, pulse-width modulation (PWM) manner. This capability makes the BQ24190RGET a versatile and efficient choice for devices or systems requiring a battery charger, such as notebooks, power bank, cell phones, medical and consumer wearables, and portable electronics. The BQ24190RGET also offers a range of protection features to protect the battery, charger, and even the device in case of unexpected conditions, such as input and output overvoltage, temperature, and current protection.

Product Overview

The BQ24190RGET is a constant-current, constant-voltage (CC-CV) switch-mode charger created to charge and directly power a lithium-ion or lithium-polymer battery. With its wide input voltage range from 2.6 V to 21 V, it is targeted for charging applications that use USB OTG, wall adapters, and USB PD. Advanced features, such as trickle charging for low battery states, an internal pre-boost circuit for fast initial USB-PD charging, and charging status pins, make it suitable for a wide variety of applications.The BQ24190RGET is an ideal solution for many devices or systems requiring a battery charger, such as notebooks, power banks, cellular phones, medical and consumer wearables, and portable electronics. It consists of two main ICs, the BQ24190R and the BQ24192R. The mono-channel charger includes a buck-mode boost converter and two buck converters. The BQ24190R control module drives the boost-mode charger and provides control, monitoring, and communications capabilities, while the BQ24192R integrates a synchronous buck-mode charger and two buck converters. It can handle input power ranging up to 11 W, and provides up to 4A output.

Features and Benefits

The BQ24190RGET has many features that make it an ideal choice for robust and efficient power conversion.* It is a single channel, CC-CV switch-mode charger with pre-boost.* It supports up to 21 V input voltage range, with a maximum 11 W output power.* It provides efficient power conversion with low power losses.* It offers a trickle charge that helps restore the battery to full capacity if its voltage level falls below the normal charging voltage.* It has an integrated output over-voltage protection feature that protects the battery from over-voltage conditions.* It has thermal protection features which help the charging circuit regulate its temperature, preventing damage to the circuit.* It also has input overvoltage protection that helps protect the device from potentially damaging high-voltage conditions.* It includes two buck converters that can be used to power peripherals, such as LEDs.

Working Principle

The BQ24190RGET uses a CC-CV switch-mode charging mechanism to provide the constant voltage, and sometimes constant current, required for battery charging. It works by using a pulse-width modulation (PWM) signal to control a switching transistor that rapidly switches between charging and discharging the battery. During this cycle, the battery voltage is monitored and kept at a steady level, allowing for fast and efficient charging.At the start of the charge cycle, the BQ24190RGET begins with constant current mode. The battery’s voltage is monitored and when it reaches a certain level, the charge switches to constant voltage mode. This helps maintain the voltage and keep it from dropping too low. When the pre-set voltage is reached, the charge current is slowly decreased to a minimum level, known as the trickle current. This helps the battery stay at a full charge and extends the life of the battery.

Conclusion

The BQ24190RGET is a high-efficiency, single-channel CC-CV switch-mode charger designed to charge and directly power lithium-ion or lithium-polymer batteries. It is a versatile, robust charging solution that offers a range of protection features and requires minimal external components. It is an ideal choice for applications such as notebooks, power banks, cellular phones, medical and consumer wearables, and portable electronics.

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