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BQ24630

更新时间： 2024-11-27 06:44:11
品牌 Logo 应用领域
德州仪器 - TI 电池开关
页数 文件大小 规格书
35页 1980K
描述
Stand-Alone Synchronous Switch-Mode Lithium Phosphate Battery Charger with System Power Selector and Low Iq

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BQ24630 数据手册

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bq24630  
www.ti.com  
SLUS894 –JANUARY 2010  
Stand-Alone Synchronous Switch-Mode Lithium Phosphate Battery Charger with System  
Power Selector and Low Iq  
Check for Samples: bq24630  
1
FEATURES  
•
•
24-Pin 4×4-mm2 QFN Package  
•
•
•
•
300 kHz NMOS-NMOS Synchronous Buck  
Converter  
Energy Star Low Quiescent Current Iq  
–
–
< 15 mA Off-State Battery Discharge current  
Stand-alone Charger Specifically for Lithium  
Phosphate  
< 1.5 mA Off-State Input Quiescent Current  
5V–28V VCC Input Operating Range, Support  
1-7 Battery Cells  
APPLICATIONS  
•
•
•
•
•
Power Tool and Portable Equipment  
Personal Digital Assistants  
Handheld Terminals  
Industrial and Medical Equipment  
Netbook, Mobile Internet Device and  
Ultra-Mobile PC  
High-Accuracy Voltage and Current Regulation  
–
–
–
±0.5% Charge Voltage Accuracy  
±3% Charge Current Accuracy  
±3% Adapter Current Accuracy  
•
•
Integration  
–
Automatic System Power Selection from  
DESCRIPTION  
Adapter or Battery  
The bq24630 is highly integrated switch-mode battery  
charge controller designed specifically for Lithium  
Phosphate battery. It offers a constant-frequency  
synchronous PWM controller with high accuracy  
current  
preconditioning,  
–
–
–
Internal Loop Compensation  
Internal Soft Start  
Dynamic Power Management (DPM)  
and  
voltage  
termination,  
regulation,  
adapter  
charge  
current  
Safety Protection  
–
–
Input Over-Voltage Protection  
regulation, and charge status monitoring.  
Battery Thermistor Sense Suspend Charge  
at Hot/Cold and Automatically ICHARGE/8 at  
Hot/Cold or Warm/Cool  
The bq24630 charges the battery in three phases:  
preconditioning, constant current, and constant  
voltage. Charge is terminated when the current  
reaches  
a
minimum user-selectable level.  
A
–
–
–
–
–
–
–
Battery Detection  
programmable charge timer provides  
a
safety  
Reverse Protection Input FET  
Programmable Safety Timer  
Charge Over-Current Protection  
Battery Short Protection  
Battery Over-Voltage Protection  
Thermal Shutdown  
backup. The bq24630 automatically restarts the  
charge cycle if the battery voltage falls below an  
internal threshold, and enters a low-quiescent current  
sleep mode when the input voltage falls below the  
battery voltage.  
PACKAGE AND PINOUT  
•
Status Outputs  
–
–
Adapter Present  
24  
23  
22  
21  
20  
19  
Charger Operation Status  
18  
17  
1
2
ACN  
ACP  
REGN  
GND  
•
•
Charge Enable Pin  
OAT  
(bq24630)  
QFN-24  
ACDRV  
16  
15  
14  
13  
3
4
5
6
ACSET  
ISET 2  
SRP  
6V Gate Drive for Synchronous Buck  
Converter  
CE  
STAT1  
TS  
•
30ns Driver Dead-time and 99.95% Max  
Effective Duty Cycle  
SRN  
7
8
9
10  
11  
12  
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 © 2010, Texas Instruments Incorporated  
1234567...35

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