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BQ25120AEVM

700nA Low Iq Highly Integrated Battery Charge Management Evaluation Module for Wearables & Hearables

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BQ25120AEVM

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Overview

The bq25120AEVM evaluation module is a highly integrated battery charge management IC that integrates the most common functions for wearables devices: linear charger, regulated output, load switch, manual reset with timer, and battery voltage monitor. The low quiescent current during operation and shutdown enables amaximum battery life. The device supports charge currents from 5 mA to 300 mA. The input current limit, charge current, PWM output voltage, LDO output voltage, and other parameters are programmable through the I2C interface. The battery is charged using a standard li-ion charge profile with three phases: precharge, constant current and constant voltage

Features
  • Configurable 300mA buck regulator (1.8V default)
  • 700nA typical IQ with PWM enabled (no load)
  • Up to 300mA charge current for fast charging
  • 0.5% accurate battery voltage regulation (configurable from 3.6V to 4.65V in 10mV steps)
  • Configurable termination current down to 500µA

µ-USB cable
Battery charger ICs
BQ25120A — 300-mA linear battery charger with Power Path, integrated LDO and buck converter 1.8V default output BQ25125 — Low IQ highly integrated battery charge management solution for wearables and IoT
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HARDWARE AND SOFTWARE PACKAGE

Evaluate BQ25120A highly integrated linear battery charger for wearable and hearable applications

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Evaluate BQ25120A highly integrated linear battery charger for wearable and hearable applications

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Start evaluating with the required hardware, communication interface and software that you will need to evaluate the BQ25120AEVM.
Evaluation board

BQ25120AEVM — 700nA Low Iq Highly Integrated Battery Charge Management Evaluation Module for Wearables & Hearables

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Why do I need this? This board allows you to start evaluating theBQ25120A.
Supported products & hardware
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BQ25120AEVM — 700nA Low Iq Highly Integrated Battery Charge Management Evaluation Module for Wearables & Hearables

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Interface adapter

EV2400 — USB-Based PC Interface Board for Battery Fuel (Gas) Gauge Evaluation Module

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Why do I need this? This is a communication interface board that you will need to configure the BQ25120A registers from a windows PC.
Supported products & hardware

Supported products & hardware

Hardware development
Evaluation board
BQ25630EVM — BQ25630 evaluation module BQ25756EVM — BQ25756 evaluation module for 1- to 14-cell bidirectional buck-boost battery charge controller BQ76920EVM — BQ76920 evaluation board with BQ78350  BQ76930EVM — BQ76930 evaluation board with BQ78350 BQ76940EVM — BQ76940 evaluation board with BQ78350
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EV2400 — USB-Based PC Interface Board for Battery Fuel (Gas) Gauge Evaluation Module

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Hardware development
Evaluation board
BQ25630EVM — BQ25630 evaluation module BQ25756EVM — BQ25756 evaluation module for 1- to 14-cell bidirectional buck-boost battery charge controller BQ76920EVM — BQ76920 evaluation board with BQ78350  BQ76930EVM — BQ76930 evaluation board with BQ78350 BQ76940EVM — BQ76940 evaluation board with BQ78350
Application software & framework

BQSTUDIO-TEST — Battery Management Studio (bqStudio) Software – Beta version downloads

Required
Why do I need this? This GUI software allows you to set the registers for your device.
Supported products & hardware

Supported products & hardware

Products
Battery charger ICs
BQ24800 — SMBus 1-4 cell Buck battery charge controller to support hybrid power boost and battery boost mode BQ25720 — SMBus 1- to 4-cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25723 — I²C 1-4 cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25731 — I2C 1-5 cell NVDC buck-boost battery charge controller with USB type-C PD support BQ25756 — Stand-alone or I²C-controlled 70-V bidirectional buck-boost charge controller with MPPT BQ25790 — Integrated, NVDC, 5-A 1-cell to 4-cell switch-mode buck-boost battery charger BQ25792 — I2C controlled, 5-A, 1-4 cell buck-boost charger with dual-input selector and USB PD 3.0 OTG output
Battery fuel gauges
BQ27220 — Single cell pack/system-side CEDV battery fuel (gas) gauge w/pre-programmed chemistry profiles BQ27320 — Single cell pack/System-side CEDV battery fuel (gas) gauge BQ27425-G1 — System-side Impedance Track™; fuel gauge with direct battery connection | gas gauge battery BQ27425-G2A — System-side Impedance Track™; fuel gauge for LiCoO2 battery BQ27425-G2B — System-side Impedance Track™; fuel gauge LiMn2O4 battery BQ27427 — Single-cell battery fuel gauge with pre-programmed chemistry and integrated sense resistor BQ27520-G4 — System side Impedance Track™ fuel gauge with integrated LDO. BQ27530-G1 — System-side Impedance-Track fuel (gas) gauge with direct battery connection BQ27531-G1 — Battery management unit Impedance Track™ fuel (gas) gauge for bq2419x charger controller BQ27532-G1 — Battery management unit Impedance Track™ fuel gauge for bq2425x charger BQ27545-G1 — Single cell, pack side, Impedance Track™ fuel gauge BQ27546-G1 — Single cell Impedance Track™ pack side fuel gauge with DSBGA package BQ27621-G1 — System-side fuel gauge with Dynamic Voltage Correlation, battery gas gauge BQ27741-G1 — Pack-side Impedance Track™(tm) fuel (gas) gauge with integrated protector BQ27742-G1 — Single cell Li-ion battery fuel gauge with integrated protection | battery gas gauge BQ27Z561 — Impedance Track™ integrated circuit gas gauge solution for 1-series BQ27Z746 — Pack-side, single-cell Impedance Track™ technology fuel gauge with integrated protector BQ28Z610 — Battery fuel gauge with integrated protector for 1-2 series packs BQ34110 — Multi-chemistry high-cell Count battery fuel gauge with integrated rarely discharged module BQ34210-Q1 — Automotive Qualified Single cell system-side CEDV fuel gauge BQ34Z100-G1 — Multi-chemistry Impedance Track™ standalone fuel gauge | battery gas gauge BQ35100 — Battery fuel gauge for non-rechargeable batteries (lithium primary) and end-of-service monitor BQ4050 — 1-4 series CEDV battery fuel (gas) gauge BQ40Z50 — 1-4 series Li-ion battery pack manager | battery fuel (gas) gauge BQ40Z50-R1 — 1-4 series Li-ion battery pack manager supporting Turbo Mode 1.0 BQ40Z50-R2 — 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0 BQ40Z60 — Complete multi-cell battery manager | battery fuel (gas) gauge BQ40Z80 — 2-s to 6-s battery pack manager with Impedance Track™ gas gauging BQ78350 — Companion CEDV Fuel Gauge Battery Management Controller for bq76940 Monitor Family BQ78350-R1 — CEDV li-ion gas gauge and battery management controller BQ78Z100 — Impedance Track™ battery fuel (gas) gauge for 1-series to 2-series
Battery monitors & balancers
BQ76905 — Low-power monitor and protector for 2S to 5S with high accuracy cell voltage measurement BQ76907 — Low-power monitor and protector for 2S to 7S with high accuracy cell voltage measurement BQ769142 — 3-s to 14-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4 battery BQ76942 — 3-series to 10-series multicell battery monitor and protector BQ76952 — 3-s to 16-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4 BQ76972 — 3s-to-16s high-accuracy battery monitor and protector for Li-ion, Li-poly and LiFePO4
Battery protectors
BQ77307 — Low-power protector for 2S to 7S with high accuracy cell voltage measurement
Hardware development
Evaluation board
MKST-3P-ALT-EV2300 — MKS Technology alternative for EV2300 communications transceiver
Download options

BQSTUDIO-TEST — Battery Management Studio (bqStudio) Software – Beta version downloads

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Version: 1.3.128
Release date: Aug 6, 2025
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GASGAUGECHEM-SW Latest chemistry database for Battery Management Studio  — 0 K

Download Chemistry zip file for bqStudio & use bqStudio Help menu to import the latest chemistries.

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BatteryManagementStudio-1.3.128_Build1a-windows-installer.exe  — 209948 K

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Products
Battery charger ICs
BQ24800 — SMBus 1-4 cell Buck battery charge controller to support hybrid power boost and battery boost mode BQ25720 — SMBus 1- to 4-cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25723 — I²C 1-4 cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25731 — I2C 1-5 cell NVDC buck-boost battery charge controller with USB type-C PD support BQ25756 — Stand-alone or I²C-controlled 70-V bidirectional buck-boost charge controller with MPPT BQ25790 — Integrated, NVDC, 5-A 1-cell to 4-cell switch-mode buck-boost battery charger BQ25792 — I2C controlled, 5-A, 1-4 cell buck-boost charger with dual-input selector and USB PD 3.0 OTG output
Battery fuel gauges
BQ27220 — Single cell pack/system-side CEDV battery fuel (gas) gauge w/pre-programmed chemistry profiles BQ27320 — Single cell pack/System-side CEDV battery fuel (gas) gauge BQ27425-G1 — System-side Impedance Track™; fuel gauge with direct battery connection | gas gauge battery BQ27425-G2A — System-side Impedance Track™; fuel gauge for LiCoO2 battery BQ27425-G2B — System-side Impedance Track™; fuel gauge LiMn2O4 battery BQ27427 — Single-cell battery fuel gauge with pre-programmed chemistry and integrated sense resistor BQ27520-G4 — System side Impedance Track™ fuel gauge with integrated LDO. BQ27530-G1 — System-side Impedance-Track fuel (gas) gauge with direct battery connection BQ27531-G1 — Battery management unit Impedance Track™ fuel (gas) gauge for bq2419x charger controller BQ27532-G1 — Battery management unit Impedance Track™ fuel gauge for bq2425x charger BQ27545-G1 — Single cell, pack side, Impedance Track™ fuel gauge BQ27546-G1 — Single cell Impedance Track™ pack side fuel gauge with DSBGA package BQ27621-G1 — System-side fuel gauge with Dynamic Voltage Correlation, battery gas gauge BQ27741-G1 — Pack-side Impedance Track™(tm) fuel (gas) gauge with integrated protector BQ27742-G1 — Single cell Li-ion battery fuel gauge with integrated protection | battery gas gauge BQ27Z561 — Impedance Track™ integrated circuit gas gauge solution for 1-series BQ27Z746 — Pack-side, single-cell Impedance Track™ technology fuel gauge with integrated protector BQ28Z610 — Battery fuel gauge with integrated protector for 1-2 series packs BQ34110 — Multi-chemistry high-cell Count battery fuel gauge with integrated rarely discharged module BQ34210-Q1 — Automotive Qualified Single cell system-side CEDV fuel gauge BQ34Z100-G1 — Multi-chemistry Impedance Track™ standalone fuel gauge | battery gas gauge BQ35100 — Battery fuel gauge for non-rechargeable batteries (lithium primary) and end-of-service monitor BQ4050 — 1-4 series CEDV battery fuel (gas) gauge BQ40Z50 — 1-4 series Li-ion battery pack manager | battery fuel (gas) gauge BQ40Z50-R1 — 1-4 series Li-ion battery pack manager supporting Turbo Mode 1.0 BQ40Z50-R2 — 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0 BQ40Z60 — Complete multi-cell battery manager | battery fuel (gas) gauge BQ40Z80 — 2-s to 6-s battery pack manager with Impedance Track™ gas gauging BQ78350 — Companion CEDV Fuel Gauge Battery Management Controller for bq76940 Monitor Family BQ78350-R1 — CEDV li-ion gas gauge and battery management controller BQ78Z100 — Impedance Track™ battery fuel (gas) gauge for 1-series to 2-series
Battery monitors & balancers
BQ76905 — Low-power monitor and protector for 2S to 5S with high accuracy cell voltage measurement BQ76907 — Low-power monitor and protector for 2S to 7S with high accuracy cell voltage measurement BQ769142 — 3-s to 14-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4 battery BQ76942 — 3-series to 10-series multicell battery monitor and protector BQ76952 — 3-s to 16-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4 BQ76972 — 3s-to-16s high-accuracy battery monitor and protector for Li-ion, Li-poly and LiFePO4
Battery protectors
BQ77307 — Low-power protector for 2S to 7S with high accuracy cell voltage measurement
Hardware development
Evaluation board
MKST-3P-ALT-EV2300 — MKS Technology alternative for EV2300 communications transceiver

Documentation

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Documentation Overview

Battery Management Studio (bqStudio) Documentation

Release Information

Battery Management Studio (bqStudio) offers a full suite of robust tools to assist with the process of evaluating, designing with, configuring, testing, or otherwise utilizing TI Battery management products. This includes features that provide full access to registers and data memory including support for real-time watching, graphing, and logging, an easy interface to send commands, direct low-level communication and I/O, as well as automated and guided support for configuration, calibration, performing a learning cycle, and generating useful files for taking the device to production.

 

  • This version of bqStudio supports the latest chemistry updates.
  • Operating systems: Windows 7 (64 bit), Windows 8 (64 bit), Windows 10 (64 bit)

 

Older products such as bq20xxx and bq30xxx are not supported in bqStudio. Download the specific evaluation software from the appropriate product page.

Requires: EV2400 or MKST-3P-ALT-EV2300

What's new

  • See Release notes
Documentation & related resources
Support software BQ25120A Setup Guide Tool

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Evaluation board

BQ25120AEVM — 700nA Low Iq Highly Integrated Battery Charge Management Evaluation Module for Wearables & Hearables

Supported products & hardware
In stock
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Out of stock on TI.com
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BQ25120AEVM — 700nA Low Iq Highly Integrated Battery Charge Management Evaluation Module for Wearables & Hearables

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Technical documentation

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Type Title Date
* EVM User's guide bq25120AEVM and bq25122EVM Evaluation Modules (Rev. A) Dec 4, 2017
Certificate BQ25120AEVM EU Declaration of Conformity (DoC) Jan 2, 2019

Related design resources

Hardware development

INTERFACE ADAPTER
EV2400 — USB-Based PC Interface Board for Battery Fuel (Gas) Gauge Evaluation Module

Support & training

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