홈 배터리 관리 IC 배터리 충전기 IC
홈
배터리 관리 IC
배터리 충전기 IC

BQ25120A

활성

전원 경로, 통합 LDO 및 벅 컨버터 1.8V 기본 출력을 지원하는 300mA 선형 배터리 충전기

지금 주문하기
데이터 시트

BQ25120A

활성
데이터 시트 지금 주문하기

제품 상세 정보

Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Charge current (max) (A) 0.3 Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, Input OVP, Integrated LDO, Integrated buck converter, Power Path, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.4 Vin (max) (V) 5.5 Absolute max Vin (max) (V) 20 Control topology Linear Battery charge voltage (min) (V) 3.6 Battery charge voltage (max) (V) 4.65 Control interface I2C Operating temperature range (°C) -40 to 85
Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Charge current (max) (A) 0.3 Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, Input OVP, Integrated LDO, Integrated buck converter, Power Path, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.4 Vin (max) (V) 5.5 Absolute max Vin (max) (V) 20 Control topology Linear Battery charge voltage (min) (V) 3.6 Battery charge voltage (max) (V) 4.65 Control interface I2C Operating temperature range (°C) -40 to 85
DSBGA (YFP) 25 6.75999999999999792000000000000016 mm² (— mm × — mm)
  • Increases System Operation Time Between Charges
    • Configurable 300-mA Buck Regulator
      (1.8-V Default)
    • 700 nA (typical) Iq with Buck Converter Enabled (No Load)
    • Configurable Load Switch or 100mA LDO Output (Load Switch by Default)
    • Up to 300-mA Charge Current for Fast Charging
    • 0.5% Accurate Battery Voltage Regulation (Configurable from 3.6 V to 4.65 V in 10-mV Steps)
    • Configurable Termination Current Down to
      500 µA
    • Simple Voltage Based Battery Monitor
  • Highly Integrated Solution with Small Footprint
    • 2.5 mm x 2.5 mm WCSP Package and 6 External Components for Minimal Solution
    • Push-Button Wake-Up and Reset with Adjustable Timers
    • Power Path Management for Powering the System and Charging the Battery
    • Power Path Management enables <50 nA Ship Mode Battery Quiescent Current for Longest Shelf Life
    • Battery Charger Operates from 3.4 V – 5.5 VIN (5.5-V OVP / 20-V Tolerant)
    • Dedicated Pins for Input Current Limit, Charge Current, Termination Current, and Status Output
  • I2C Communication Control
    • Charge Voltage and Current
    • Termination Threshold
    • Input Current Limit
    • VINDPM Threshold
    • Timer Options
    • Load Switch Control
    • Controls for Interrupts for Faults and Status
    • System Output Voltage Adjustment
    • LDO Output Voltage Adjustment
  • Increases System Operation Time Between Charges
    • Configurable 300-mA Buck Regulator
      (1.8-V Default)
    • 700 nA (typical) Iq with Buck Converter Enabled (No Load)
    • Configurable Load Switch or 100mA LDO Output (Load Switch by Default)
    • Up to 300-mA Charge Current for Fast Charging
    • 0.5% Accurate Battery Voltage Regulation (Configurable from 3.6 V to 4.65 V in 10-mV Steps)
    • Configurable Termination Current Down to
      500 µA
    • Simple Voltage Based Battery Monitor
  • Highly Integrated Solution with Small Footprint
    • 2.5 mm x 2.5 mm WCSP Package and 6 External Components for Minimal Solution
    • Push-Button Wake-Up and Reset with Adjustable Timers
    • Power Path Management for Powering the System and Charging the Battery
    • Power Path Management enables <50 nA Ship Mode Battery Quiescent Current for Longest Shelf Life
    • Battery Charger Operates from 3.4 V – 5.5 VIN (5.5-V OVP / 20-V Tolerant)
    • Dedicated Pins for Input Current Limit, Charge Current, Termination Current, and Status Output
  • I2C Communication Control
    • Charge Voltage and Current
    • Termination Threshold
    • Input Current Limit
    • VINDPM Threshold
    • Timer Options
    • Load Switch Control
    • Controls for Interrupts for Faults and Status
    • System Output Voltage Adjustment
    • LDO Output Voltage Adjustment

The bq25120A is a highly integrated battery charge management IC that integrates the most common functions for wearable devices: Linear charger, regulated output, load switch, manual reset with timer, and battery voltage monitor. The integrated buck converter is a high efficiency, low IQ switcher using DCS control that extends light load efficiency down to 10-µA load currents. The low quiescent current during operation and shutdown enables maximum battery life. The device supports charge currents from 5 mA to 300 mA. The input current limit, charge current, buck converter 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. A voltage-based JEITA compatible battery pack thermistor monitoring input (TS) is included that monitors battery temperature and automatically changes charge parameters to prevent the battery from charging outside of its safe temperature range. The charger is optimized for 5-V USB input, with 20-V tolerance to withstand line transients. The buck converter is run from the input or battery. When in battery only mode, the device can run from a battery up to 4.65 V.

A configurable load switch allows system optimization by disconnecting infrequently used devices. The manual reset with timer allows mutliple different configuration options for wake are reset optimization.

The bq25120A is a highly integrated battery charge management IC that integrates the most common functions for wearable devices: Linear charger, regulated output, load switch, manual reset with timer, and battery voltage monitor. The integrated buck converter is a high efficiency, low IQ switcher using DCS control that extends light load efficiency down to 10-µA load currents. The low quiescent current during operation and shutdown enables maximum battery life. The device supports charge currents from 5 mA to 300 mA. The input current limit, charge current, buck converter 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. A voltage-based JEITA compatible battery pack thermistor monitoring input (TS) is included that monitors battery temperature and automatically changes charge parameters to prevent the battery from charging outside of its safe temperature range. The charger is optimized for 5-V USB input, with 20-V tolerance to withstand line transients. The buck converter is run from the input or battery. When in battery only mode, the device can run from a battery up to 4.65 V.

A configurable load switch allows system optimization by disconnecting infrequently used devices. The manual reset with timer allows mutliple different configuration options for wake are reset optimization.

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기술 자료

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11개 모두 보기
상위 문서 유형 직함 형식 옵션 최신 영어 버전 다운로드 날짜
* 데이터 시트 bq25120A Low IQ Highly Integrated Battery Charge Management Solution for Wearables and IoT datasheet (Rev. A) PDF | HTML 2017. 11. 21
기술 문서 더 작고 더 오래 가는 웨어러블 기기를 설계하는 방법 PDF | HTML 2026. 5. 22
애플리케이션 노트 Implementing 2-V Charge Inhibition PDF | HTML 2023. 5. 31
애플리케이션 노트 BQ2512x Frequently Asked Questions 2021. 11. 22
기술 문서 3 quiescent-current (Iq) specifications you need to understand PDF | HTML 2021. 11. 12
기술 문서 Pull the tab: How to implement ship mode in your lithium-ion battery design PDF | HTML 2019. 2. 20
애플리케이션 노트 Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) 2018. 5. 1
기술 문서 Choosing the right battery charger for your portable medical device design PDF | HTML 2018. 1. 22
기술 문서 The future of wearable biosensors and linear chargers PDF | HTML 2017. 12. 4
기술 문서 How to choose the right linear charger for your application PDF | HTML 2017. 11. 17
애플리케이션 노트 Improved Fast Charge Using the bq25120 Adjustible VBATREG, Charge Current, TS, 2016. 8. 8

설계 및 개발

추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.

평가 보드

BQ25120AEVM — 웨어러블 및 히어러블용 700nA 저 Iq 고집적 배터리 충전 관리 평가 모듈

bq25120AEVM 평가 모듈(EVM)은 선형 충전기, 조정 출력, 부하 스위치, 타이머가 있는 수동 리셋, 배터리 전압 모니터 등 웨어러블 장치에 가장 일반적인 기능을 통합하는 고집적 배터리 충전 관리 IC입니다. 작동 및 셧다운 중에 낮은 정동작 전류로 최대 배터리 수명을 지원합니다. 이 장치는 5mA~300mA의 충전 전류를 지원합니다. 입력 전류 제한, 충전 전류, PWM 출력 전압, LDO 출력 전압 및 기타 매개 변수는 I2C 인터페이스를 통해 프로그래밍 가능합니다. 배터리는 사전 충전, 정전류, 정전압의 3단계로 (...)
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지원 소프트웨어

SLUC696 — BQ25120A Setup Guide Tool

지원되는 제품 및 하드웨어
레퍼런스 디자인

PMP11311 — bq51003 및 bq25120을 사용한 무선 충전이 가능한 웨어러블 장치용 전원 레퍼런스 설계

Wearable devices require advanced power management to achieve long battery run times with always-on functionality.  Additionally, the devices need to use small rechargeable batteries and enable small footprint designs.  This application note shows the implementation of a scalable power (...)

지원되는 제품 및 하드웨어
레퍼런스 디자인

TIDA-00712 — 스마트워치 배터리 관리 솔루션 레퍼런스 설계

This reference design is for smartwatch battery management solution (BMS). It is suitable for low-power wearable devices like smartwatch applications. The design includes an ultra-low current 1 cell Li-ion linear charger; a highly integrated Qi-compliant wireless power receiver; a (...)

지원되는 제품 및 하드웨어
레퍼런스 디자인

TIDA-00761 — 웨어러블 및 IoT 애플리케이션을 위한 저전력 배터리 충전 관리 레퍼런스 디자인

The TIDA-00761 is a power management solution using the bq25120 IC in a small form factor design targeted at low power wearable devices.  It integrates the most common functions for wearable devices: Linear charger, regulated output, load switch, manual reset with timer, and battery voltage (...)

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DSBGA (YFP) 25 Ultra Librarian
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