BQ27220 bq27220 システム側 Impedance Track™ バッテリ残量計、内蔵検出抵抗器付き | TIJ.co.jp

BQ27220
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bq27220 システム側 Impedance Track™ バッテリ残量計、内蔵検出抵抗器付き

bq27220 システム側 Impedance Track™ バッテリ残量計、内蔵検出抵抗器付き - BQ27220
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概要

The Texas Instruments bq27220 battery fuel gauge is a single-cell gauge that requires minimal user-configuration and system microcontroller firmware development, leading to quick system bring-up. The bq27220 device uses the Compensated End-of-Discharge Voltage (CEDV) algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), runtime-to-empty (min), battery voltage (mV), temperature (°C), and state-of-health (%).

The bq27220 battery fuel gauge has ultra-low power consumption in NORMAL (50 µA) and SLEEP (9 µA) modes, leading to longer battery runtime. Configurable interrupts help save system power and free up the host from continuous polling. Accurate temperature sensing is supported via an external thermistor.

Customers can use preloaded CEDV parameters in ROM or can generate custom chemistry parameters using TI’s web-based tool, GAUGEPARCAL. Custom-generated parameters can be either programmed in the device RAM by the host on power up of the system or customers can program the parameters to an onboard One-Time Programmable (OTP) memory.

Battery fuel gauging with the bq27220 device requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The tiny, 9-ball, 1.62 mm × 1.58 mm, 0.5-mm pitch NanoFree chip scale package (DSBGA) is ideal for space-constrained applications.

特長

  • Single-Cell Li-Ion Battery Fuel Gauge
    • Resides in Pack or on System Board
    • Supports Embedded or Removable Batteries
    • Powers Directly from Battery with Integrated
      LDO
    • Supports a Low-Value (10-mΩ) External Sense
      Resistor
  • Ultra-Low Power Consumption in NORMAL
    (50 µA) and SLEEP (9 µA) Modes
  • Battery Fuel Gauging Based on Compensated
    End-of-Discharge Voltage (CEDV) Technology
    • Reports Remaining Capacity and State-of-
      Charge (SOC) with Smoothing Filter
    • Adjusts Automatically for Battery Aging, Self-
      Discharge, Temperature, and Rate Changes
    • Provides Battery State-of-Health (Aging)
      Estimation
  • Microcontroller Peripheral Supports:
    • 400-kHz I2C™ Serial Interface
    • Configurable SOC Interrupt OR
      Battery Low Digital Output Warning
    • Internal Temperature Sensor OR
      Host-Reported Temperature OR
      External Thermistor

機能一覧

他の製品と比較 バッテリ残量計 メール Excelへダウンロード
Part number オーダー・オプション Number of series cells Cell chemistry Battery capacity (Max) (mAh) Communication interface Battery capacity (Min) (mAh) External capacity indication Implementation Gas gauge algorithm Cell balancing Features Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
BQ27220 ご注文 Single Cell     Li-Ion/Li-Polymer     29000     I2C     100     None     Pack
System    
CEDV         CEDV     -40 to 85     DSBGA | 9     9DSBGA: 3 mm2: 1.75 x 1.75 (DSBGA | 9)    
BQ27426 ご注文 Single Cell     Li-Ion/Li-Polymer     14000     I2C     100     None     System     Impedance Track             -40 to 85     DSBGA | 9     9DSBGA: 3 mm2: 1.75 x 1.75 (DSBGA | 9)    
BQ27520-G4 ご注文 Single Cell     Li-Ion/Li-Polymer     32000     I2C     100     None     System     Impedance Track             -40 to 85     DSBGA | 15     15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA | 15)    
BQ27621-G1 ご注文 Single Cell     Li-Ion/Li-Polymer     32000     I2C     100     None     System     Dynamic Voltage Correlation         No Sense Resistor Required     -40 to 85     DSBGA | 9     9DSBGA: 3 mm2: 1.75 x 1.75 (DSBGA | 9)    
BQ35100 ご注文 Single Cell     Primary Lithium     32000     I2C     100     None     Pack
System    
Primary         Accumulated Coulomb Count     -40 to 85     TSSOP | 14     14TSSOP: 32 mm2: 6.4 x 5 (TSSOP | 14)