Texas Instruments BQ27505EVM - BQ27505 System-Side, Single-Cell Impedance Track??? Technology Evaluation Module BQ27505E BQ27505EVM 데이터 시트
제품 코드
BQ27505EVM
Host System
Single Cell Li-lon
Battery Pack
PACK-
PROTECTION
IC
CHG
DSG
DSG
Temp
Sense
SOC_INT
Current
Sense
T
PACK+
Voltage
Sense
BAT_GD
Low
FETs
bq27505
Power
Management
Controller
VCC
DATA
LDO
I2C
Battery
Not Recommended for New Designs
www.ti.com
SLUS884 – FEBRUARY 2009
System-Side Impedance Track™ Fuel Gauge
Check for Samples:
1
INTRODUCTION
1.1
FEATURES
1.2
APPLICATIONS
123
• Battery Fuel Gauge for 1-Series Li-Ion
•
Smartphones
Applications
•
PDAs
• Resides on System Main Board
•
Digital Still and Video Cameras
– Works With Embedded or Removable
•
Handheld Terminals
Battery Packs
•
MP3 or Multimedia Players
• Uses PACK+, PACK–, and T Battery Terminals
• Microcontroller Peripheral Provides:
• Microcontroller Peripheral Provides:
1.3
DESCRIPTION
– Accurate Battery Fuel Gauging
– Internal Temperature Sensor for Battery
– Internal Temperature Sensor for Battery
The Texas Instruments bq27505 system-side Li-Ion
Temperature Reporting
battery fuel gauge is a microcontroller peripheral that
– Battery Low Interrupt Warning
provides fuel gauging for single-cell Li-Ion battery
– Battery Insertion Indicator
packs.
The
device
requires
little
system
– Configurable Level of State of Charge (SOC)
microcontroller firmware development. The bq27505
Interrupts
resides on the system’s main board and manages an
– State of Health Indicator
embedded battery (non-removable) or a removable
– 96 Bytes of Non-Volatile Scratch-Pad FLASH
battery pack.
• Battery Fuel Gauge Based on Patented
The bq27505 uses the patented Impedance Track™
Impedance Track™ Technology
algorithm for fuel gauging, and provides information
– Models the Battery Discharge Curve for
such
as
remaining
battery
capacity
(mAh),
Accurate Time-to-Empty Predictions
state-of-charge (%), run-time to empty (min), battery
– Automatically Adjusts for Battery Aging,
voltage (mV), temperature (°C) and state of health
Battery Self-Discharge, and
(%).
Temperature/Rate Inefficiencies
– Low-Value Sense Resistor (10 m
Ω
or Less)
Battery fuel gauging with the bq27505 requires only
• 400KHz I
2
C™ Interface for Connection to
PACK+ (P+), PACK– (P–), and Thermistor (T)
System Microcontroller Port
connections
to
a
removable
battery
pack
or
• In a 12-Pin NanoFree™ (CSP) Packaging
embedded battery circuit. The CSP option is a 12-ball
package in the dimensions of 2,43 mm × 1,96 mm
with 0,5 mm lead pitch. It is ideal for space
constrained applications.
package in the dimensions of 2,43 mm × 1,96 mm
with 0,5 mm lead pitch. It is ideal for space
constrained applications.
TYPICAL APPLICATION
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.
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
Impedance Track, NanoFree are trademarks of Texas Instruments.
3
400KHz I
2
C is a trademark of Philips Electronics.
PRODUCTION DATA information is current as of publication date.
Copyright © 2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.