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bq25070DQCR

更新时间： 2024-09-29 12:21:31
品牌 Logo 应用领域
德州仪器 - TI 电池
页数 文件大小 规格书
21页 830K
描述
1A, Single-Input, Single-Cell LiFePO4 Linear Battery Charger with 50mA LDO

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bq25070DQCR 数据手册

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bq25070  
www.ti.com  
SLUSA66 –JULY 2011  
1A, Single-Input, Single-Cell LiFePO Linear Battery Charger with 50mA LDO  
4
Check for Samples: bq25070  
•
•
•
Battery NTC Monitoring  
Charging Status Indication  
Available in Small 2mm × 3mm 10 Pin SON  
Package  
1
FEATURES  
•
•
Single Cell LiFePO4 Charging Algorithm  
30V Input Rating, With 10.5V Over-Voltage  
Protection (OVP)  
•
•
50mA Integrated Low Dropout Linear  
Regulator (LDO)  
Programmable Charge Current Through Single  
Input Interface (CTRL)  
7% Charge Current Regulation Accuracy  
Thermal Regulation and Protection  
Soft-Start Feature to Reduce Inrush Current  
APPLICATIONS  
•
•
•
•
Smart Phones  
Mobile Phones  
Portable Media Players  
Low Power Handheld Devices  
•
•
•
DESCRIPTION  
The bq25070 is a highly integrated LiFePO4 linear battery charger targeted at space-limited portable applications.  
It operates from either a USB port or AC Adapter and charges a single-cell LiFePO4 battery with up to 1A of  
charge current. The 30V input voltage range with input over-voltage protections supports low-cost unregulated  
adapters.  
The bq25070 has a single power output that charges the battery and powers the system. The charge current is  
programmable up to 1A using the CTRL input. Additionally, a 4.9V ±10% 50mA LDO is integrated into the IC for  
supplying low power external circuitry.  
The LiFePO4 charging algorithm removes the constant voltage mode control usually present in Li-Ion battery  
charge cycles. Instead, the battery is fastcharged to the overcharge voltage and then allowed to relax to a lower  
float charge voltage threshold. The removal of the constant voltage control reduces charge time significantly.  
During the charge cycle, an internal control loop monitors the IC junction temperature and reduces the charge  
current if an internal temperature threshold is exceeded. The charger power stage and charge current sense  
functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, and  
charge status display.  
APPLICATION SCHEMATIC  
V
GPIO  
R2  
bq25070  
STATUS  
VDD  
USB or TA  
100 kW  
CHG  
OUT  
VBUS  
GND  
D+  
IN  
C1  
0.1 mF  
C2  
1 mF  
D-  
ABB  
CTRL  
BAT  
TS  
PACK+  
TEMP  
IMON  
GND  
R1  
1 kW  
PACK-  
VCHG DET  
USB DET  
LDO  
PWRPD  
R5  
1.5 kW  
C3  
0.1 mF  
R3  
1.5 kW  
VUSBIN  
ACDET  
R4  
1.5 kW  
GPIO  
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 © 2011, Texas Instruments Incorporated  
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bq25070DQCR 替代型号

型号 品牌 替代类型 描述 数据表
bq25070DQCT TI

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