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BQ24450DR PDF预览

BQ24450DR

更新时间： 2024-11-25 06:44:11
品牌 Logo 应用领域
德州仪器 - TI 电池控制器
页数 文件大小 规格书
20页 855K
描述
INTEGRATED CHARGE CONTROLLER FOR LEAD-ACID BATTERIES

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中文翻译

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BQ24450DR 技术参数

生命周期：Obsolete包装说明：,
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.75
模拟集成电路 - 其他类型：BATTERY CHARGE CONTROLLERBase Number Matches：1

BQ24450DR 数据手册

 浏览型号BQ24450DR的Datasheet PDF文件第2页浏览型号BQ24450DR的Datasheet PDF文件第3页浏览型号BQ24450DR的Datasheet PDF文件第4页浏览型号BQ24450DR的Datasheet PDF文件第5页浏览型号BQ24450DR的Datasheet PDF文件第6页浏览型号BQ24450DR的Datasheet PDF文件第7页 
bq24450  
www.ti.com ..................................................................................................................................................................................................... SLUS929–APRIL 2009  
INTEGRATED CHARGE CONTROLLER FOR LEAD-ACID BATTERIES  
1
FEATURES  
•
•
•
Supports Different Configurations  
Minimum External Components  
•
Regulates Both Voltage and Current During  
Charging  
Available in 16-Pin PDIP and SOIC (DW)  
•
Precision Temperature-Compensated  
Reference:  
APPLICATIONS  
•
•
•
•
Emergency Lighting Systems  
Security and Alarm Systems  
Telecommunication Backup Power  
Uninterruptible Power Supplies  
–
Maximizes Battery Capacity Over  
Temperature  
–
Ensures Safety While Charging Over  
Temperature  
•
Optimum Control to Maximize Battery Capacity  
and Life  
DESCRIPTION  
The bq24450 contains all the necessary circuitry to optimally control the charging of valve-regulated lead-acid  
batteries. The IC controls the charging current as well as the charging voltage to safely and efficiently charge the  
battery, maximizing battery capacity and life. Depending on the application, the IC can be configured as a simple  
constant-voltage float charge controller or a dual-voltage float-cum-boost charge controller.  
The built-in precision voltage reference is especially temperature-compensated to track the characteristics of  
lead-acid cells, and maintains optimum charging voltage over an extended temperature range without using any  
external components. The ICs low current consumption allows for accurate temperature monitoring by minimizing  
self-heating effects.  
The IC can support a wide range of battery capacities and charging currents, limited only by the selection of the  
external pass transistor. The versatile driver for the external pass transistor supports both NPN and PNP types  
and provides at least 25mA of base drive.  
In addition to the voltage- and current-regulating amplifiers, the IC features comparators that monitor the  
charging voltage and current. These comparators feed into an internal state machine that sequences the charge  
cycle. Some of these comparator outputs are made available as status signals at external pins of the IC. These  
status and control pins can be connected to a processor, or they can be connected up in flexible ways for  
standalone applications.  
TYPICAL APPLICATION SCHEMATIC  
R
ISNS  
Q
EXT  
VRLA  
Battery  
External  
Supply  
3
2
4
16  
15  
R
R
T
A
ISNSP ISNSM  
IN  
IFB  
DRVC DRVE  
PRE-CHG  
11  
12  
5
1
CE  
ISNS  
R
R
B
13  
VFB  
bq24450  
R
8
9
BSTOP  
STAT2  
D
10  
7
STAT1  
C
PGOOD  
GND  
6
COMP  
14  
C
COMP  
A dual-level Float-cum-Boost Charger with Pre-Charge  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2009, Texas Instruments Incorporated  
1234567...20

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