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Texas Instruments bq21061 Battery Charge Management IC

Texas Instruments bq21061 Battery Charge Management IC integrates the most common functions for wearable, portable, and small medical devices. It includes a charger, a regulated output voltage rail for system power, an LDO, and a push-button controller.

The Texas Instruments bq21061 IC integrates a linear charger with PowerPath that allows a quick and accurate charge for small batteries while providing a regulated voltage to the system. The regulated system voltage (PMID) output may be configured through I2C based on the recommended operating conditions of downstream ICs and system loads for optimal system operation.

Features

  • Linear battery charger with 1.25mA to 500mA fast charge current range
    • 0.5% accurate I2C programmable battery regulation voltage ranging from 3.6V to 4.6V in 10mV steps
    • Configurable termination current supporting down to 0.5mA
    • 20V tolerant input with typical 3.4V to 5.5V input voltage operating range
    • Programmable thermal charging profile, fully configurable hot, warm, cool, and cold thresholds
  • Power path management for powering system and charging battery
    • I2C programmable regulated system voltage (PMID) ranging from 4.4V to 4.9V, in addition to battery voltage tracking and input pass-through options
    • Dynamic power path management optimizes charging from weak adapters
    • Advanced I2C control allows the host to disconnect the battery or adapter as needed
  • I2C configurable load switch or up to 150mA LDO output
    • Programmable range from 0.6V to 3.7V in 100mV steps
  • Ultra-low Iddq for extended battery life
    • 10nA ship mode battery Iq
    • 400nA Iq while powering the system (PMID and VDD on)
  • One push-button wake-up and reset input with adjustable timers
    • Supports system power cycle and HW reset
  • 20-Pin 2mm x 1.6mm CSP package
  • 11mm2 total solution size

Applications

  • Headsets, earbuds, and hearing aids
  • Smart watches and smart trackers
  • Wearable fitness and activity monitors
  • Blood glucose monitors

Schematic

Schematic - Texas Instruments bq21061 Battery Charge Management IC

Related Development Tool

Texas Instruments bq21061EVM Battery Charger Evaluation Module (EVM)

Designed to help evaluate the bq21061, an integrated linear battery charger with LDO and low IQ.

Learn Moreabout Texas Instruments bq21061EVM Battery Charger Evaluation Module (EVM) View Productsrelated to Texas Instruments bq21061EVM Battery Charger Evaluation Module (EVM)
Published: 2019-10-16 | Updated: 2023-12-18