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Texas Instruments bq25190 Linear Battery Charger

Texas Instruments bq25190 Linear Battery Charger features commonly used functions for wearable devices. Features include a linear charger with power path, one step-down switching converter (Buck), one buck-boost switching converter (Buck-Boost), two LDOs (LDO1 and LDO2), manual reset with a timer (MR), multi-channel analog-to-digital converter (ADC), and four multifunctional general-purpose input/outputs (GPIO). The highly integrated battery management unit offers low quiescent current during operation and shutdown, which allows longer battery life.

The TI bq25190 integrated charger supports charge current from 5mA to 1A, facilitating quick and accurate charging while supplying a regulated voltage to the system. The regulated system voltage (VSYS) can be configured via I2C based on the suggested operating conditions of the downstream system loads. Other operation parameters, such as the input current limit, Buck converters' output voltages, charge current, Buck-boost converters' output voltage, and LDOs' output voltages, are also programmable using the I2C interface.

Features

  • Integrated 1A power path linear battery charger
    • 3.0V to 18.0V input voltage operating range
    • Input voltage up to 25V tolerant
    • Configurable battery regulation voltage with ±0.5% accuracy from 3.5V to 4.65V in 10mV steps
    • 5mA to 1A configurable fast charge current
    • 55mΩ BATFET on-resistance
    • Up to 2.5A discharge current to support high system loads
    • Fully programmable JEITA profile for safe charging over temperature
  • Power path management for powering the system and charging the battery
    • Regulated system voltage ranging from 4.4V to 4.9V, in addition to battery voltage tracking and input pass-through options
    • Configurable input current limit
    • Dynamic power path management optimizes charging from weak adapters
    • Selectable adapter or battery for system power
    • Advanced system reset mechanisms
  • Integrated Buck converter with I2C and GPIO programmable DVS output
    • 0.36μA quiescent current from the system
    • 0.4V to 1.575V output voltage in 12.5mV steps or 0.4V to 3.6V output voltage in 25mV/50mV steps
    • Up to 600mA output current
  • Ultra-low quiescent current modes
    • 2μA battery quiescent current in battery mode
    • 15nA battery quiescent current in ship mode
  • Integrated Buck-boost converter with I2C programmable DVS output
    • 0.1μA quiescent current from the system
    • 1.7V to 5.2V output voltage in 50mV steps
    • Up to 600mA output current for VSYS ≥ 3.0V, VBBOUT = 3.3V
  • Integrated I2C programmable LDOs (LDO1 and LDO2)
    • 25nA quiescent current
    • 0.8V to 3.6V output voltage in 50mV steps
    • Up to 200mA output current
    • LDO1 is capable of remaining on, in Ship mode
    • Configurable LDO or Bypass mode
    • Dedicated input pins
  • Integrated fault protection for safety
    • Input current limit and overvoltage protection
    • Battery, integrated rail overcurrent protection
    • Battery depletion protection
    • Thermal regulation and thermal shutdown
  • Integrated 12-bit ADC to monitor input current, BATFET current, input voltage, battery voltage, battery temperature or external voltage signals

Applications

  • Smartwatches and other wearable devices
  • Portable medical equipment
  • Smart trackers
  • Retail automation and payment

Associated Eval Module

Texas Instruments bq25190EVM Evaluation Module (EVM)

An evaluation module designed for the bq25190, an integrated battery charge management IC.

Learn Moreabout Texas Instruments bq25190EVM Evaluation Module (EVM) View Productsrelated to Texas Instruments bq25190EVM Evaluation Module (EVM)

Simplified Schematic

Schematic - Texas Instruments bq25190 Linear Battery Charger
Published: 2025-01-07 | Updated: 2025-01-10