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System Side Impedance Track™ Fuel Gauge With Integrated LDO.

Availability: 10,313


Package | PIN: DSBGA (YZF) | 15
Temp: I (-40 to 85)
Package qty | Carrier: 3,000 | LARGE T&R
Custom reel may be available
Qty Price
1-99 $2.13
100-249 $1.87
250-999 $1.31
1,000+ $1.06


  • 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

Texas Instruments  HPA02254YZFR

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.