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BQ24730RGFR4 PDF预览

BQ24730RGFR4

更新时间： 2024-02-02 22:45:14
品牌 Logo 应用领域
德州仪器 - TI 开关化工
页数 文件大小 规格书
37页 4049K
描述
ADVANCED MULTI-CHEMISTRY AND MULTI-CELL SYNCHRONOUS SWITCH-MODE CHARGER AND SYSTEM POWER SELECTOR

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BQ24730RGFR4 数据手册

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bq24730  
www.ti.com  
SLUS695–MARCH 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 Fixed 300 kHz Frequency  
– Enhanced 6-V Drive Supply Voltage and  
99.5% Max Duty Cycle  
DESCRIPTION  
The bq24730 is a high efficiency synchronous battery  
pack charger with high level of integration for portable  
•
High Voltage and Current Regulation  
Accuracy (0°C-85°C):  
applications. This device implements  
a
high  
– 0.4% Charge Voltage Regulation Accuracy  
– 4% Charge Current Regulation Accuracy  
performance analog front-end that interfaces to the  
system power management micro-controller through  
a hardware interface.  
– 4% Adapter Current Regulation Accuracy  
Dynamic Power Management (DPM)  
The dynamic power management (DPM) function  
modifies the charge current depending on system  
load conditions, avoiding ac adapter overload.  
•
•
3-Cell or 4-Cell Li-Ion Battery Voltage Select  
Programmable Battery Charge Current, and  
AC Adapter Current via Resistor  
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. The input current sense amplifier can be  
enabled with no adapter to sense battery discharge  
current.  
•
•
•
2% Accurate Current Sense Amplifiers for  
Both Input Current and Charge Current  
(0°C-125°C)  
Input Current Sense Amplifier Can Be Enabled  
with No Adapter to Sense Battery Discharge  
Current  
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.  
Regulates Charge Current Down to 0-V  
Battery Voltage  
•
•
•
AC Adapter Operating Range 8 V–24 V  
Internal Soft Start  
Status Indicators:  
– AC Adapter Present  
1
2
32  
31  
30  
29  
28  
27  
26  
25  
CHGEN  
CELLS  
BATDRV  
SYS  
– Low Battery Indicator  
ACDRV  
– DPM Regulation Loop Active Indicator  
3
ACN  
4
•
•
Reverse Battery to Adapter Discharge  
Protection  
ACP  
SYNP  
SYNN  
5
ACDET  
bq24730  
(Top View)  
6
ACSET  
AIRDET  
BYPASS  
DPMDET  
LBSET  
EAO  
SRP  
SRN  
BAT  
Battery/Adapter to System Power Selector  
Function  
7
8
9
24 SRSET  
•
•
Charge Overcurrent Protection  
10  
11  
12  
23  
IBAT  
Available in 40-Pin 5x7mm QFN Package  
22  
IADAPT  
21  
LOWBAT  
EAI  
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.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2006, Texas Instruments Incorporated  
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