BQ29412DCT3RE6

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Function:	Battery Protection
Battery Chemistry:	Lithium-Ion
Number of Cells:	2 ~ 4
Fault Protection:	Over Voltage
Interface:	--
Operating Temperature:	-40°C ~ 110°C (TA)
Package / Case:	8-LSSOP, 8-MSOP (0.110", 2.80mm Width)
Supplier Device Package:	SM8
Base Part Number:	BQ29412

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Introduction

The BQ29412DCT3RE6 (BQ29412) is a high-efficiency battery management IC developed by Texas Instruments Inc. It is part of the high-efficiency Battery Management System (BMS) family of devices. The BQ29412 is a digital-programmable charge controller supporting two independent charge paths to enable high-power battery charging in applications such as automotive and aerospace. It is designed to extend the life of Lithium-Ion (Li-Ion) and Nickel-Metal Hydride (NiMH) batteries by providing protection FET control, voltage and current control, and cell balancing.

Application Fields

The BQ29412DCT3RE6 is specifically designed for Li-Ion and NiMH batteries in high-power applications. Such applications include automotive, industrial and consumer energy storage systems, energy harvesting systems, and other applications requiring long-term battery life. The BQ29412 provides a high level of safety, accuracy, and programmability to ensure optimal battery operation and management.

Features

The BQ29412DCT3RE6 battery management IC features several useful features for Li-Ion and NiMH batteries. These include: • Dual channel pulse-width modulation (PWM) for efficient power conversion• Real-time protection FET control for over-current and thermal protection • I2C interface for control and data logging• Programmable dynamometer and over-discharge voltage levels• Temperature monitoring and over-temperature protection• Sensor integration with serial peripherals• Optimized cell balancing with integrated cell and group balancing

Working Principle

The BQ29412 works by monitoring the battery voltage and current, as well as the temperature of the cells and responding appropriately. During charging, the PWM controller increases the voltage level as it charges the battery, while monitoring the current to ensure that the battery is not overcharged. The BQ29412 also monitors the temperature of the cells and can adjust the charging current accordingly to ensure that the cells are not over-temperature.The BQ29412 also incorporates cell and group balancing for Li-Ion and NiMH batteries. Cell balancing involves the equalization of charge between individual cells within the battery pack. The BQ29412 utilizes this process to ensure uniform charging of all cells in the battery. The BQ29412 also features group balancing, which is the symmetrical charging of multiple batteries in parallel. This ensures balanced discharge performance across the batteries to extend battery life. The BQ29412 also features a programmable over-discharge voltage level to ensure protection of the battery during storage and deep discharge. This feature allows for a safe low-voltage threshold and allows the battery to be monitored and protected even when not actively in use. The BQ29412 also integrates several temperature sensors to ensure battery safety and reliability. These sensors allow the device to monitor the temperature of the battery cells and adjust the charge and discharge current accordingly to ensure long-term battery life.

Conclusion

The BQ29412DCT3RE6 is an advanced Battery Management System (BMS) IC designed specifically for Li-Ion and NiMH batteries in high-power applications. It provides dual-channel PWM, real-time protection FET control, I2C interface, temperature monitoring, and cell and group balancing features. The BQ29412 also features a programmable over-discharge voltage level for battery protection during storage and deep discharge, as well as integrated temperature sensors for long-term battery life.

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