BQ24031RHLRG4

Series:	bqTINY™ III
Packaging:	Tape & Reel (TR)
Part Status:	Active
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	1
Current - Charging:	Constant - Programmable
Programmable Features:	Current, Timer
Fault Protection:	Over Temperature, Reverse Current, Short Circuit
Charge Current - Max:	1.5A
Battery Pack Voltage:	4.36V
Voltage - Supply (Max):	16V
Interface:	USB
Operating Temperature:	-40°C ~ 125°C (TJ)
Package / Case:	20-VFQFN Exposed Pad
Supplier Device Package:	20-VQFN (3.5x4.5)
Base Part Number:	BQ24031

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Introduction

The BQ24031RHLRG4 is a Battery Chargers PMIC (Power Management IC) developed by Texas Instruments. This IC (integrated circuit) is specially designed to achieve efficient power-saving during charge and discharge cycles of low-power devices powered by Lithium ion batteries. It is one of the devices of the BQ24000 series, which offers a combination of high performance power devices and battery monitoring functions.

Applications

The BQ24031RHLRG4 Battery Chargers PMIC is mostly used in a wide variety of portable electronic devices such as notebooks, tablets, phones and etc. It is also used in many consumer electronics including digital cameras, portable media players, and hard disk drives, just to name a few. The BQ24031RHLRG4 IC helps to reduce the power consumption of these devices, increase their battery life, and ensure their reliability and safety during use.

Features

The BQ24031RHLRG4 Battery Chargers PMIC features a fixed 4.2V float voltage, and the ability to charge single cell Li-ion batteries. It includes an integrated FET (field effect transistor) for reverse current protection and an integrated N-channel reverse discharge MOSFET for better efficiency. The IC also features an adjustable input current limit and thermal shutdown for over-temperature protection. In addition, it includes an LED indicator for charge status and a programmable charge termination feature.

Working Principle

The BQ24031RHLRG4 Battery Chargers PMIC performs two main functions: charging and protection. During charging, the IC regulates the battery voltage to ensure it is kept within a safe range, while maintaining an efficient charge rate. To do this, the IC uses its integrated FET switch, which is activated based on the battery voltage and its internal charge control circuitry. For protection, the IC is designed to shut down the charging process if the battery voltage is too high or if the battery is being overcharged.The IC also has a programmable charge termination feature, which is activated when the battery voltage reaches a preset cutoff voltage. This feature helps to ensure that the battery is not overcharged or over discharged. Finally, the IC includes an LED indicator to let the user know when the charging cycle is complete.

Conclusion

The BQ24031RHLRG4 Battery Chargers PMIC is an ideal power-saving device for low-power portable electronics. It offers excellent performance and protection features for efficient charging and protection of Lithium ion batteries in these devices. Its integrated FET switch and its programmable charge termination feature help to ensure that the battery is neither overcharged nor over discharged.

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