The Texas Instruments single-cell bq27320 battery fuel gauge requires very minimal configuration and system microcontroller firmware development, leading to quick system bring-up. The bq27320 uses the Compensated End-of-Discharge Voltage (CEDV) gas gauging 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 (%).
TI customers can tune chemistry parameters using TI’s web-based tool, GAUGEPARCAL.
Configurable interrupts help save system power and free up the host from continuous polling. Accurate temperature sensing is supported via an external thermistor.
Battery fuel gauging with the bq27320 requires only PACK+ (P+), PACK– (P–), and optional thermistor (T) connections to a removable battery pack or embedded battery circuit. The device uses a 15-ball NanoFree (DSBGA) package. It is ideal for space-constrained applications.
Feature
- Battery Fuel Gauge For System-/Pack-Side
Configuration - Compensated End-of-Discharge Voltage (CEDV)
Gauging Technology- Adjusts for Battery Aging, Self-Discharge,
Temperature, and Rate Changes - Reports Remaining Capacity, State-of-Charge
(SOC), and Time-to-Empty with Smoothing
Filter - Battery State-of-Health Estimation
- Supports Embedded or Removable Packs
from 100-mAhr to 14,500-mAhr Capacity - Accommodates Pack Swapping with up to
Four Separate Battery Profiles - Supports a Raw Coulomb Counter To Provide
Delta Capacity Information
- Adjusts for Battery Aging, Self-Discharge,
- Microcontroller Peripheral Supports:
- SDQ Communication Interface for
Authentication ID - 400-kHz I2C Serial Interface for High-Speed
Communication - 32 Bytes of Scratch-Pad FLASH NVM
- Battery Low Digital Output Warning
- Configurable SOC Interrupts
- External Thermistor, Internal Sensor, or Host
Reported Temperature Options
- SDQ Communication Interface for
- 15-Pin 1.375 mm × 2.75 mm × 1.75 mm
Pitch NanoFree (DSBGA) Package
