パック側 Impedance Track 対応 バッテリー残量計、LDO 内蔵 - BQ27541-G1

BQ27541-G1 (供給中)

パック側 Impedance Track 対応 バッテリー残量計、LDO 内蔵

概要

The Texas Instruments bq27541-G1 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 for accurate battery fuel gauging. The fuel gauge resides within the battery pack or on the main board of the system with an embedded battery (nonremovable).

The fuel gauge 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 (minimum), battery voltage (mV), and temperature (°C). It also provides detections for internal short or tab disconnection events.

The fuel gauge also features integrated support for secure battery pack authentication, using the SHA-1/HMAC authentication algorithm.

特長

  • Battery Fuel Gauge for 1-Series (1sXp) Li-Ion Applications
    up to 14,500-mAh Capacity
  • Microcontroller Peripheral Provides:
    • Accurate Battery Fuel Gauging Supports up to
      14,500 mAh
    • Internal or External Temperature Sensor for Battery
      Temperature Reporting
    • SHA-1/HMAC Authentication
    • Lifetime Data Logging
    • 64 Bytes of Non-Volatile Scratch Pad FLASH
  • Battery Fuel Gauging Based on Patented Impedance Track
    Technology
    • Models Battery Discharge Curve for Accurate
      Time-To-Empty Predictions
    • Automatically Adjusts for Battery Aging, Battery
      Self-Discharge, and Temperature/Rate Inefficiencies
    • Low-Value Sense Resistor (5 mΩ to 20 mΩ)
  • Advanced Fuel Gauging Features
    • Internal Short Detection
    • Tab Disconnection Detection
  • HDQ and I2C Interface Formats for Communication
    With Host System
  • Small 12-pin 2,5 mm × 4 mm SON Package

詳細を表示

機能一覧 他の製品と比較 電池残量計

 
# Series Cells
Cell Chemistry
Battery Capacity (Max) (mAh)
Communication Interface
Battery Capacity (Min) (mAh)
External Capacity Indication
Implementation
Gas Gauge Algorithm
Special Features
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
BQ27541-G1 BQ26500 BQ27000 BQ27010 BQ27200 BQ27210 BQ27510-G2
Single Cell     Single Cell     Single Cell     Single Cell     Single Cell     Single Cell     Single Cell    
Li-Ion
Li-Polymer    
Lead Acid
Li-Ion
Li-Polymer
NiCd
NiMH    
Li-Ion
Li-Polymer    
Li-Ion
Li-Polymer    
Li-Ion
Li-Polymer    
Li-Ion
Li-Polymer    
Li-Ion
Li-Polymer    
14500     6000     6000     6000     6000     6000     8000    
HDQ
I2C    
HDQ     HDQ     HDQ     I2C     I2C     I2C    
300     300     300     300     6000     300     300    
None     None     None     None     None     None     None    
Pack     Pack
System    
Pack     Pack     Pack     Pack     System    
Impedance Track     EDV     EDV     CEDV     EDV     CEDV     Impedance Track    
SHA-1 Authentication                
-40 to 85     0 to 70     -20 to 70     -20 to 70     -20 to 70     -20 to 70     -40 to 85    
12SON     8TSSOP     10VSON     10VSON     10VSON     10VSON     12SON    
1.25 | 1ku     2.47 | 1ku     1.49 | 1ku     1.60 | 1ku     1.49 | 1ku     1.60 | 1ku     1.40 | 1ku    

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