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電池管理 IC
電池充電器 IC

BQ25120A

現行

具電源路徑、整合式 LDO 和降壓轉換器 1.8V 預設輸出的 300mA 線性電池充電器

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產品規格表

BQ25120A

現行
產品規格表 立即訂購

產品詳細資料

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 2.5999999999999996 x 2.5999999999999996
  • 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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技術文件

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重要文件 類型 標題 格式選項 日期
* Data sheet bq25120A Low IQ Highly Integrated Battery Charge Management Solution for Wearables and IoT datasheet (Rev. A) PDF | HTML 2017年 11月 21日
Technical article Cómo diseñar dispositivos para llevar puestos más pequeños y con mayor autonomía de batería PDF | HTML 2026年 5月 22日
Technical article So entwickeln Sie kleinere Wearables mit längerer Batterielaufzeit PDF | HTML 2026年 5月 22日
Technical article 如何設計更小巧、兩次充電間可使用更久的穿戴式裝置 PDF | HTML 2026年 5月 22日
Technical article 더 작고 더 오래 가는 웨어러블 기기를 설계하는 방법 PDF | HTML 2026年 5月 22日
Technical article How to design wearables that are smaller and go longer between charges PDF | HTML 2024年 1月 5日
Application note Implementing 2-V Charge Inhibition PDF | HTML 2023年 5月 31日
Application note BQ2512x Frequently Asked Questions 2021年 11月 22日
Technical article 3 quiescent-current (Iq) specifications you need to understand PDF | HTML 2021年 11月 12日
Technical article Pull the tab: How to implement ship mode in your lithium-ion battery design PDF | HTML 2019年 2月 20日
Application note Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) 2018年 5月 1日
Technical article Choosing the right battery charger for your portable medical device design PDF | HTML 2018年 1月 22日
Technical article The future of wearable biosensors and linear chargers PDF | HTML 2017年 12月 4日
Technical article How to choose the right linear charger for your application PDF | HTML 2017年 11月 17日
Application note Improved Fast Charge Using the bq25120 Adjustible VBATREG, Charge Current, TS, 2016年 8月 8日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

BQ25120AEVM — 適用於穿戴式裝置和耳戴式裝置的 700nA 低 IQ 高度整合式電池充電管理評估模組

bq25120AEVM 評估模組是高度整合式電池充電管理 IC，其中整合了穿戴式裝置最常見的功能：線性充電器、穩壓輸出、負載開關、計時器手動重設與電池電壓監控。運作和關機期間的低靜態電流可最大限度延長電池使用壽命。本裝置支援從 5mA 至 300mA 的充電電流。輸入電流限制、充電電流、PWM 輸出電壓、LDO 輸出電壓和其它參數可透過 I2C 介面進行程式化。該電池採用具有三相位的標準鋰離子充電曲線充電：預充電、恆流和恆壓。
使用指南: PDF
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支援軟體

SLUC696 — BQ25120A Setup Guide Tool

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參考設計

PMP11311 — 採用 bq51003 和 bq25120 進行無線充電的穿戴式裝置電源參考設計

穿戴式裝置需要先進的電源管理，以延長電池運作時間且提供常開功能。  此外，裝置需要使用小型可充電電池，並實現小體積設計。  此應用說明展示了針對穿戴式裝置的可擴充電源管理解決方案的實作情形，可針對活動監控器或智慧手錶量身打造。此設計提供無線充電輸入、可高度配置的電池管理解決方案，搭載鋰離子電池充電器和低靜態電流 (Iq) DC/DC 降壓；適用於 PMOLED 顯示的升壓轉換器；適用於心率監測器 (HRM) 的升壓轉換器，以及第二個可配置低 Iq DC/DC 降壓轉換器。
Test report: PDF
電路圖: PDF
參考設計

TIDA-00712 — 智慧型手錶電池管理解決方案參考設計

此參考設計適用於智慧型手錶的電池管理解決方案 (BMS)。它適用於智慧型手錶等低功率穿戴式裝置。此設計包括一個超低電流 1 芯鋰離子線性充電器；一個高度集成、Qi 標準相容的無線電源接收器；一個符合成本效益的電壓和電流防護積體電路；一個系統側集成感測電阻器電池電量計和一個輸出高達 28 V 的升壓器，適用於 LCD 顯示裝置。

此設計採用小尺寸 (20mm x 29mm) PCB 實作；其輸入電源可為來自 micro-USB 連接器或符合 Qi 標準的無線電源發射器，並且當偵測到來自 micro-USB 連接器的 5V 電源供應時，無線電源發射器將關閉。

Design guide: PDF
電路圖: PDF
參考設計

TIDA-00761 — 適用於穿戴式裝置和物聯網應用的低功耗電池充電管理參考設計

TIDA-00761 是一款採用 bq25120 IC 的電源管理解決方案，採用小型化設計，專為低功率穿戴式裝置而設計。  其整合了穿戴式裝置最常用的功能：線性充電器、穩壓輸出、負載開關、具定時器的手動重設及電池電壓監控本裝置支援從 5 mA 至 300 mA 的充電電流。
Design guide: PDF
電路圖: PDF
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DSBGA (YFP) 25 Ultra Librarian
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