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BQ24650

更新时间： 2024-11-25 12:20:35
品牌 Logo 应用领域
德州仪器 - TI 电池开关控制器
页数 文件大小 规格书
33页 2665K
描述
Synchronous Switch-Mode Battery Charge Controller for Solar Power With Maximum Power Point Tracking

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BQ24650 数据手册

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bq24650  
www.ti.com  
SLUSA75 –JULY 2010  
Synchronous Switch-Mode Battery Charge Controller for Solar Power  
With Maximum Power Point Tracking  
Check for Samples: bq24650  
1
FEATURES  
DESCRIPTION  
•
Maximum Power Point Tracking (MPPT)  
Capability by Input Voltage Regulation  
The bq24650 is a highly integrated switch-mode  
battery charge controller. It provides input voltage  
regulation, which reduces charge current when input  
voltage falls below a programmed level. When the  
input is powered by a solar panel, the input regulation  
loop lowers the charge current so that the solar panel  
can provide maximum power output.  
•
•
•
Programmable MPPT Setting  
5V-28V Input Solar Panel  
600kHz NMOS-NMOS Synchronous Buck  
Controller  
•
•
Resistor Programmable Float Voltage  
Accommodates Li-Ion/Polymer, LiFePO4, Lead  
Acid Chemistries  
The  
synchronous PWM controller with high accuracy  
current and voltage regulation, charge  
bq24650  
offers  
a
constant-frequency  
•
Accuracy  
preconditioning, charge termination, and charge  
status monitoring.  
–
–
–
±0.5% Charge Voltage Regulation  
±3% Charge Current Regulation  
±0.6% Input Voltage Regulation  
The bq24650 charges the battery in three phases:  
pre-conditioning, constant current, and constant  
voltage. Charge is terminated when the current  
reaches 1/10 of the fast charge rate. The pre-charge  
timer is fixed at 30 minutes. The bq24650  
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.  
•
•
High Integration  
–
–
Internal Loop Compensation  
Internal Digital Soft Start  
Safety  
–
–
–
–
Input Over-Voltage Protection  
Battery Temperature Sensing  
Battery Absent Detection  
Thermal Shutdown  
The bq24650 supports a battery from 2.1V to 26V  
with VFB set to a 2.1V feedback reference. The  
charge current is programmed by selecting an  
appropriate sense resistor. The bq24650 is available  
in a 16 pin, 3.5×3.5 mm2 thin QFN package.  
•
Charge Status Outputs for LED or Host  
Processor  
•
•
Charge Enable on MPPSET Pin  
Automatic Sleep Mode for Low Power  
Consumption  
–
<15mA Off-State Battery Discharge Current  
14  
13  
16  
15  
•
Small 3.5 × 3.5 mm2 QFN-16 Package  
VCC  
MPPSET  
STAT1  
TS  
REGN  
GND  
SRP  
1
2
12  
11  
10  
9
PAS  
bq24650  
APPLICATIONS  
•
•
•
•
•
Solar Powered Applications  
Remote Monitoring Stations  
Portable Handheld Instruments  
12V to 24V Automotive Systems  
Current-Limited Power Source  
3
4
SRN  
5
6
7
8
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...33

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