BQ296203DSGT

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Introduction

BQ296203DSGT is a multi-function, low power, high performance power management integrated circuit (PMIC) manufactured by Texas Instruments. It is specially designed to provide a complete and intelligent battery-charging solution for 3.2-8V Lithium-ion batteries. This PMIC integrates both voltage and current regulation with advanced safety and protection features, which can safely deliver constant current/constant voltage charge algorithm for Lithium-ion batteries. In addition, it comes with built-in I2C and Programmable logic control (PLC) to enable easy interfacing and access power management features. In order to provide comprehensive control and protection, BQ296203DSGT also supports the monitoring of different charge paths, cell, gas gauging, and temperature sensing functions.

Application Field and Working Principle

BQ296203DSGT PMIC is mainly used for battery-charging applications, such as portable computing and other applications that require Lithium-ion batteries. This device integrates various voltage, current regulation and advanced safety control features into a single chip and can be adjusted to work with 3.2V-8V Lithium-ion batteries. The comprehensive safety and protection functions include cell balancing, gas gauging, temperature sensing, and over-current/voltage protection.

The following steps explain the working principle of the BQ296203DSGT:

1. Battery monitoring: The first step is to monitor the battery health. BQ296203DSGT has a built-in monitoring circuit that continuously monitors the charging/discharging current, battery voltage, temperature, cell balance and other battery information. All of this information is stored in the device and can be accessed with the I2C interface.

2. Battery charging: Once the battery has been monitored and found to be healthy, BQ296203DSGT will initiate the necessary charging algorithm. This algorithm gradually increases the charging current and voltage, which conforms to the most commonly used Li-ion battery charging protocol, and controls the discharge rate in order to maximize battery life and performance. The charging is automatically halted when the battery is fully charged.

3. Battery protection: The last step is the protection of the battery and management of the charge flow. BQ296203DSGT has built-in protection features that protect the battery from over-voltage, over-current, and reverse-polarity. It also has adjustable charge / discharge current protection, temperature sensing control and cell balancing functions. All of these features keep the battery healthy and functioning properly over time.

Conclusion

BQ296203DSGT is an advanced PMIC device that provides the complete power management solution for Lithium-ion batteries. Its built-in monitoring, charging, and protection capabilities work together to ensure that the battery is fully charged while also providing protection from over-voltage, over-current and reverse-polarity. This makes it an ideal choice for powering various portable computing devices and other applications that require Lithium-ion batteries.

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