The Texas Instruments bq27520-G4 system-side 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 fuel gauge resides on the main board of the system and manages an embedded battery (non-removable) or a removable battery pack.
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), temperature (°C), and state of health (%).
Battery fuel gauging 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 in the nominal dimensions of 2610 × 1956 μm with 0.5-mm lead pitch. It is ideal for space-constrained applications.
Feature
- Single-Series Cell Li-Ion Battery Fuel Gauge Resides on System Board
- Integrated 2.5 VDC LDO
- External Low-Value 10-mΩ Sense Resistor
- Patented Impedance Track? Technology
- Adjusts for Battery Aging, Self-Discharge, Temperature, and Rate Changes
- Reports Remaining Capacity, State-of-Charge (SOC), and Time-to-Empty
- Optional Smoothing Filter
- Battery State-of-Health (Aging) Estimation
- Supports Embedded or Removable Packs with up to 32A hr Capacity
- Accommodates Pack Swapping With 2 Separate Battery Profiles
- Microcontroller Peripheral Supports:
- 400-kHz I2C Serial Interface
- 32 Bytes of Scratch-Pad FLASH NVM
- Battery Low Digital Output Warning
- Configurable SOC Interrupts
- External Thermistor, Internal Sensor, or Host- reported Temperature Options
- Tiny 15-pin, 2610 × 1956 μm, 0.5-mm pitch NanoFree? (DSBGA) Package
The Texas Instruments bq27520-G4 system-side 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 fuel gauge resides on the main board of the system and manages an embedded battery (non-removable) or a removable battery pack.
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), temperature (°C), and state of health (%).
Battery fuel gauging 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 in the nominal dimensions of 2610 × 1956 μm with 0.5-mm lead pitch. It is ideal for space-constrained applications.
