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BQ27520-G3

更新时间： 2024-10-01 11:46:07
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47页 862K
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System-Side Impedance Track? Fuel Gauge With Integrated LDO

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BQ27520-G3 数据手册

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bq27520-G3  
www.ti.com  
SLUSAP0 –DECEMBER 2011  
System-Side Impedance Track™ Fuel Gauge With Integrated LDO  
Check for Samples: bq27520-G3  
1 INTRODUCTION  
1.1 FEATURES  
1.2 APPLICATIONS  
123  
• Battery Fuel Gauge for 1-Series Li-Ion  
•
•
•
•
•
Smartphones  
Applications  
• Resides on System Main Board  
PDAs  
Digital Still and Video Cameras  
Handheld Terminals  
MP3 or Multimedia Players  
– Works With Embedded or Removable  
Battery Packs  
• Uses PACK+, PACK–, and T Battery Terminals  
• Microcontroller Peripheral Provides:  
– Accurate Battery Fuel Gauging  
1.3 DESCRIPTION  
– Internal Temperature Sensor for Battery  
The Texas Instruments bq27520-G3 system-side  
Temperature Reporting  
– Battery Low Interrupt Warning  
– Battery Insertion Indicator  
– Configurable Level of State of Charge (SOC)  
Interrupts  
– State of Health Indicator  
Li-Ion battery fuel gauge is  
a
microcontroller  
peripheral that provides fuel gauging for single-cell  
Li-Ion battery packs. The device requires little system  
microcontroller firmware development. The resides on  
the system’s main board and manages an embedded  
battery (non-removable) or a removable battery pack.  
– Current Data Logging Buffer  
The bq27520-G3 uses the patented Impedance  
Track™ algorithm for fuel gauging, and provides  
information such as remaining battery capacity  
(mAh), state-of-charge (%), run-time to empty (min),  
battery voltage (mV), temperature (°C) and state of  
health (%).  
– 32 Bytes of Non-Volatile Scratch-Pad FLASH  
• Battery Fuel Gauge Based on Patented  
Impedance Track™ Technology  
– Models the Battery Discharge Curve for  
Accurate Time-to-Empty Predictions  
– Automatically Adjusts for Battery Aging,  
Battery Self-Discharge, and  
Battery fuel gauging with the requires only PACK+  
(P+), PACK– (P–), and Thermistor (T) connections to  
a removable battery pack or embedded battery  
circuit. The CSP option is a 15-ball package in the  
nominal dimensions of 2610 × 1956 µm with 0,5 mm  
lead pitch. It is ideal for space constrained  
applications.  
Temperature/Rate Inefficiencies  
– Low-Value Sense Resistor (10 mΩ or Less)  
• 400-kHz I2C™ Interface for Connection to  
System Microcontroller Port  
• In a 15-Pin NanoFree™ (CSP) Packaging  
TYPICAL APPLICATION  
Host System  
Single Cell Li-lon  
Battery Pack  
VCC  
CE  
LDO  
PACK+  
PROTECTION  
IC  
Voltage  
Sense  
Battery  
Low  
Temp  
Sense  
I2C  
DATA  
Power  
Management  
Controller  
T
bq27520-G3  
CHG  
DSG  
FETs  
PACK-  
BAT_GD  
SOC_INT  
Current  
Sense  
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.  
Impedance Track, NanoFree are trademarks of Texas Instruments.  
2
3
I2C is a trademark of NXP B.V. Corp Netherlands.  
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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