BQ2004SNTRG4

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Battery Chemistry:	Multi-Chemistry
Number of Cells:	--
Current - Charging:	Constant, Pulsed
Programmable Features:	Voltage
Fault Protection:	--
Charge Current - Max:	--
Battery Pack Voltage:	--
Voltage - Supply (Max):	5.5V
Interface:	--
Operating Temperature:	-20°C ~ 70°C (TA)
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	16-SOIC
Base Part Number:	BQ2004

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Introduction

The BQ2004SNTRG4 is a highly integrated battery charging device from Texas Instruments, designed for applications such as portable medical instruments, cell phones, MP3 players and other portable consumer electronics. It combines a 3-cell lithium-ion / lithium-polymer battery charger with a constant-current/constant-voltage (CC/CV) output. The BQ2004SNTRG4 also provides extra features such as over-voltage protection and thermal protection.

Battery Charger Overview

The BQ2004SNTRG4 operates using a 4-cell stack configuration with a 4 or 8 cell battery stack. It is designed to be used with either 3 or 4 series cells, depending on the application.In addition to the 3 or 4 series configuration, the BQ2004SNTRG4 also offers a dual-channel current control feature. Each channel is independently adjustable, allowing the user to program up to 2 currents up to 2.25A (peak). The device also includes a temperature control feature which can be used to adjust the charge or discharge current, depending on the battery temperature.

Application Field and Working Principle

The BQ2004SNTRG4 is ideally suited for applications such as portable medical instruments, cell phones, MP3 players and other portable consumer electronics. It can charge a variety of battery chemistries and offers a constant-current/constant-voltage (CC/CV) charging profile.The BQ2004SNTRG4 uses a PWM control method for charging the battery. The device also features current foldback protection, which prevents over-charging of the battery by detecting the battery capacity and automatically reducing the current if the battery is near full. The foldback protection also prevents the battery from over-heating and reduces the risk of fire.The BQ2004SNTRG4 also includes reverse battery protection and over-voltage protection, which help to ensure that the device operates safely.The device also includes an LDO on-chip power supply monitoring circuit, which can be used to monitor the battery status and charge/discharge parameters. This enables the device to ensure that the battery is properly charged and balanced.

Conclusion

The BQ2004SNTRG4 is a highly integrated battery charging device from Texas Instruments. It is designed for applications such as portable medical instruments, cell phones, MP3 players and other portable consumer electronics, offering a constant-current/constant-voltage (CC/CV) charging profile.The device features current foldback protection, reverse battery protection, over-voltage protection, and an on-chip power supply monitoring circuit. This ensures that the device operates safely and that the battery is properly charged and balanced.

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