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BQ24721CRHBTG4

更新时间： 2024-01-13 21:00:25
品牌 Logo 应用领域
德州仪器 - TI 电源电路开关电源管理电路化工
页数 文件大小 规格书
60页 1961K
描述
ADVANCED MULTI-CHEMISTRY AND MULTI-CELL SYNCHRONOUS SWITCH-MODE CHARGER AND SYSTEM POWER SELECTOR

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BQ24721CRHBTG4 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：QFN
包装说明：HVQCCN,针数：32
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：6 weeks
风险等级：5.14可调阈值：NO
模拟集成电路 - 其他类型：POWER SUPPLY MANAGEMENT CIRCUITJESD-30 代码：S-PQCC-N32
JESD-609代码：e4长度：5 mm
湿度敏感等级：2信道数量：1
功能数量：1端子数量：32
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：HVQCCN
封装形状：SQUARE封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1 mm最大供电电压 (Vsup)：24 V
最小供电电压 (Vsup)：8 V表面贴装：YES
温度等级：INDUSTRIAL端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：5 mmBase Number Matches：1

BQ24721CRHBTG4 数据手册

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bq24721, bq24721C  
www.ti.com  
SLUS683C–NOVEMBER 2005–REVISED DECEMBER 2006  
ADVANCED MULTI-CHEMISTRY AND MULTI-CELL SYNCHRONOUS SWITCH-MODE  
CHARGER AND SYSTEM POWER SELECTOR  
FEATURES  
APPLICATIONS  
•
•
•
Portable Notebook Computers  
Portable DVD Players  
Webpads, PC Tablets  
•
High Efficiency NMOS-NMOS Synchronous  
Buck Converter With User-Selectable 300 kHz  
or 500 kHz frequency  
•
•
•
bq24721C Offers Softer Turn-On, Stronger  
Turn-Off  
SBS-Like (1) SMBus Interface for Control and  
Status Communications With Host  
DESCRIPTION  
The bq24721 is a high efficiency synchronous  
battery pack charger with high level of integration for  
portable applications. This device implements a high  
performance analog front-end that interfaces to the  
system power management micro-controller through  
a simplified SBS-like SMBus interface.  
Programmable Battery Voltage, Charge  
Current, and AC Adapter Current via SBS-Like  
SMBus Interface  
•
•
•
0.4% Charge Voltage Regulation Accuracy  
3% Charge Current Regulation Accuracy  
The dynamic power management (DPM) function  
modifies the charge current depending on system  
load conditions, avoiding ac adapter overload.  
3% Adapter Current Regulation Accuracy  
Dynamic Power Management (DPM)  
High accuracy current sense amplifiers enable  
accurate measurement of either the charge current  
or the ac adapter current, allowing termination of  
nonsmart packs and monitoring of overall system  
power.  
•
•
•
2% Accuracy Integrated Charge and AC  
Adapter 20× Current Amplifier Output  
3-Cell and 4-Cell Li-Ion Voltage Regulation  
9 V, 12 V–14.4 V, 16 V–19.2 V  
Battery Pack Voltage Operating Range  
0 V–19.2 V  
The adapter isolation diode can be bypassed or  
entirely replaced with an external MOSFET using a  
control signal provided by the bq24721, thus  
reducing overall power dissipation.  
•
•
•
•
AC Adapter Operating Range 8 V–28 V  
99.5% Max Duty Cycle  
Integrated features such as charger soft start, charge  
overcurrent protection, and IC temperature  
monitoring provide a second level of protection, in  
addition to pack and system protection functions.  
Internal Soft Start  
Integrated 5% 5-V LDO When AC Adapter  
Applied  
•
•
•
6-V Drive Supply Voltage for Increased  
Efficiency  
5x5 QFN PACKAGE (TOP VIEW)  
Reverse Battery to Adapter Discharge  
Protection  
1
2
24  
23  
22  
21  
20  
19  
CHGEN  
BATDRV  
SYS  
Battery/Adapter to System Power Selector  
Function  
ACDRV  
ACN  
3
4
5
6
7
8
SYNP  
SYNN  
SRP  
•
•
•
Charge and Adapter Overcurrent Protection  
Battery Thermistor Sense, TS, Comparators  
Available in 32-Pin 5x5-mm QFN Package  
ACP  
bq24721,  
bq24721C  
ACDET  
SRN  
BYPASS  
EAO  
18 BAT  
17  
EAI  
IOUT  
(1) SBS-Like interface is not 100% SBS compliant. SBS-Like  
interface is SMBus1.1 complaint but does not support Packet  
Error Correction (PEC). The control and status registers were  
changed to simplify and enhance notebook charger control.  
An 8-bit address (0x12) is used. See Table 1 for a  
comparison between SBS-like vs SBS Specification.  
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.  
PowerPAD is a trademark of Texas Instruments.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2005–2006, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
1234567...60

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