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BQ24155RGYT

更新时间： 2024-01-01 06:28:36
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德州仪器 - TI 电池开关
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30页 1319K
描述
Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance

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BQ24155RGYT 数据手册

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bq24155  
www.ti.com  
SLUS942 –FEBRUARY 2010  
Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance  
Check for Samples: bq24155  
1
FEATURES  
2
•
Charge Faster than Linear Chargers  
APPLICATIONS  
•
•
•
Mobile and Smart Phones  
MP3 Players  
Handheld Devices  
•
High-Accuracy Voltage and Current Regulation  
–
–
–
Input Current Regulation Accuracy: ±5%  
(100 mA and 500 mA)  
Charge Voltage Regulation Accuracy:  
±0.5% (25°C), ±1% (0°C-125°C)  
DESCRIPTION  
The bq24155 is a compact, flexible, high-efficiency,  
USB-friendly switch-mode charge management  
device for single-cell Li-ion and Li-polymer batteries  
used in a wide range of portable applications. The  
charge parameters can be programmed through an  
I2C interface. The bq24155 integrates a synchronous  
PWM controller, power FETs, input current sensing,  
high-accuracy current and voltage regulation, and  
charge termination, into a small WCSP package.  
Charge Current Regulation Accuracy: ±5%  
•
High-Efficiency Mini-USB/AC Battery Charger  
for Single-Cell Li-Ion and Li-Polymer Battery  
Packs  
•
•
•
•
20-V Absolute Maximum Input Voltage Rating  
6-V Maximum Operating Input Voltage  
Built-In Input Current Sensing and Limiting  
Integrated Power FETs for Up To 1.25-A  
Charge Rate  
The bq24155 charges the battery in three phases:  
conditioning, constant current and constant voltage.  
The input current is automatically limited to the value  
set by the host. Charge is terminated based on  
user-selectable minimum current level. A safety timer  
with reset control provides a safety backup for I2C  
interface. During normal operation, bq24155  
automatically restarts the charge cycle if the battery  
voltage falls below an internal threshold and  
automatically enters sleep mode or high impedance  
mode when the input supply is removed. The charge  
status is reported to the host using the I2C compatible  
interface.  
•
Programmable Charge Parameters through  
I2C™ Compatible Interface (up to 3.4 Mbps):  
–
–
–
–
–
Input Current  
Fast-Charge/Termination Current  
Charge Voltage (3.5 V to 4.44 V)  
Safety Timer with Reset Control  
Termination Enable  
•
Synchronous Fixed-Frequency PWM  
Controller Operating at 3 MHz with 0% to  
99.5% Duty Cycle  
Typical Application Circuit  
•
•
Automatic High Impedance Mode for Low  
Power Consumption  
L
1.0 mH  
O
R
SNS  
V
BUS  
C
VBUS  
SW  
C
O
IN  
Robust Protection  
C
U1  
BOOT  
10nF  
10  
mF  
1 mF  
bq24155  
PACK+  
+
–
Reverse Leakage Protection Prevents  
Battery Drainage  
PMID  
BOOT  
PGND  
C
IN  
0.1 mF  
VAUX  
4.7 mF  
CSIN  
10 kW  
10 kW  
2
I
C BUS  
PACK-  
10 kW  
–
–
Thermal Regulation and Protection  
Input/Output Overvoltage Protection  
CSOUT  
SCL  
SCL  
SDA  
STAT  
SDA  
AUXPWR  
VREF  
C
STAT  
ISEL  
SGND  
AUXPWR  
ISEL  
C
1
mF  
VREF  
10 kW  
•
•
•
•
•
Status Output for Charging and Faults  
USB Friendly Boot-Up Sequence  
Automatic Charging  
1
mF  
HOST  
Power Up System without Battery  
3.5 mm x 3.5 mm 14-Pin QFN Package  
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.  
2
I2C is a trademark of Philips Electronics.  
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...30

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BQ24155RGYT 替代型号

型号 品牌 替代类型 描述 数据表
BQ24155RGYR TI

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 Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance

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