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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

Number of series cells 1 Charge current (max) (A) 0.3 Vin (max) (V) 5.5 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Battery charge voltage (min) (V) 3.6 Battery charge voltage (max) (V) 4.65 Absolute max Vin (max) (V) 20 Control topology Linear Control interface I2C 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 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1 Charge current (max) (A) 0.3 Vin (max) (V) 5.5 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Battery charge voltage (min) (V) 3.6 Battery charge voltage (max) (V) 4.65 Absolute max Vin (max) (V) 20 Control topology Linear Control interface I2C 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 Rating Catalog 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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類型 標題 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 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
EVM User's guide bq25120AEVM and bq25122EVM Evaluation Modules (Rev. A) 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
EVM User's guide bq2512x Evaluation Module User's Guide (Rev. A) 2016年 5月 2日

設計與開發

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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

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 (...)
使用指南: PDF
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SLUC696 — BQ25120A Setup Guide Tool

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產品
電池充電器 IC
BQ25120A — 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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Linear Charger NTC Calculator

SLUC670.ZIP (350 KB)
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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

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 (...)
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

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 (...)
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

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 (...)
Design guide: PDF
電路圖: PDF
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