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電池管理 IC
電池充電器 IC

BQ25887

現行

適用於 USB 輸入、整合式電池芯平衡的 I2C 2 節 2A 升壓電池充電器

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產品規格表

BQ25887

現行
產品規格表 立即訂購

產品詳細資料

Number of series cells 2 Charge current (max) (A) 2 Vin (max) (V) 6.2 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 6.8 Battery charge voltage (max) (V) 9.2 Absolute max Vin (max) (V) 20 Control topology Switch-Mode Boost Control interface I2C Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, ICO (Input Current Optimization), Input OVP, Integrated ADC, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.9 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 2 Charge current (max) (A) 2 Vin (max) (V) 6.2 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 6.8 Battery charge voltage (max) (V) 9.2 Absolute max Vin (max) (V) 20 Control topology Switch-Mode Boost Control interface I2C Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, ICO (Input Current Optimization), Input OVP, Integrated ADC, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.9 Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RGE) 24 16 mm² 4 x 4
  • High-efficiency 2-A, 1.5-MHz switch mode boost charger
    • 93.4% Charge efficiency at 5-V adapter, 7.6-V battery, 1-A charge
    • Optimized for USB input and 2-cell Li-Ion battery
    • Selectable low power PFM mode for light load operation
  • Single input to support USB input adapters
    • Supports 3.9-V to 6.2-V input voltage range with 20-V absolute maximum input voltage rating
    • Input current limit (500 mA to 3.3 A with 100-mA resolution) to support USB2.0, USB3.0 standard adapters
    • Maximum power tracking by input voltage limit up-to 5.5 V
  • Cell balancing and I2C control
    • Integrated FETs for balancing current up to 400 mA
    • Automatic cell balancing with default register setting
  • Input current optimizer (ICO) to maximize input power without overloading adapters
  • Integrated 16-bit ADC for system monitoring (BUS voltage and current, each cell voltage, charge current, and NTC and die temperature)
  • High integration includes all MOSFETs, current sensing and loop compensation
  • High accuracy
    • ±0.5% Charge voltage regulation
    • ±5% Charge current regulation
    • ±7.5% Input current regulation
  • Safety
    • Battery temperature sensing in charge
    • Thermal regulation and thermal shutdown
  • High-efficiency 2-A, 1.5-MHz switch mode boost charger
    • 93.4% Charge efficiency at 5-V adapter, 7.6-V battery, 1-A charge
    • Optimized for USB input and 2-cell Li-Ion battery
    • Selectable low power PFM mode for light load operation
  • Single input to support USB input adapters
    • Supports 3.9-V to 6.2-V input voltage range with 20-V absolute maximum input voltage rating
    • Input current limit (500 mA to 3.3 A with 100-mA resolution) to support USB2.0, USB3.0 standard adapters
    • Maximum power tracking by input voltage limit up-to 5.5 V
  • Cell balancing and I2C control
    • Integrated FETs for balancing current up to 400 mA
    • Automatic cell balancing with default register setting
  • Input current optimizer (ICO) to maximize input power without overloading adapters
  • Integrated 16-bit ADC for system monitoring (BUS voltage and current, each cell voltage, charge current, and NTC and die temperature)
  • High integration includes all MOSFETs, current sensing and loop compensation
  • High accuracy
    • ±0.5% Charge voltage regulation
    • ±5% Charge current regulation
    • ±7.5% Input current regulation
  • Safety
    • Battery temperature sensing in charge
    • Thermal regulation and thermal shutdown

The BQ25887 is a highly-integrated 2-A boost switch-mode battery charge management device for 2-cell (2s) Li-Ion and Li-polymer battery. The BQ25887 has I2C control with cell balancing for USB input.

The BQ25887 is a highly-integrated 2-A boost switch-mode battery charge management device for 2-cell (2s) Li-Ion and Li-polymer battery. The BQ25887 has I2C control with cell balancing for USB input.

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* Data sheet BQ25887 I2C Controlled 2-Cell, 2-A Boost-Mode Battery Charger With Cell Balancing For USB Input datasheet (Rev. B) PDF | HTML 2019年 11月 3日
Application note State of Charge Estimation Using Smart Battery Charger PDF | HTML 2021年 10月 11日
Technical article 4 Reasons why you should use a boost charger for 2-cell battery application PDF | HTML 2019年 4月 3日
Application note USB charging solution for 2-cell (2S) discrete using BQ25887 with cell-balancing 2019年 3月 28日
User guide BQ25887 QFN boost-mode battery charger evaluation module 2019年 2月 5日

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開發板

BQ25887EVM — 使用電池平衡的升壓電池充電器評估模組

Charging 2-cell, 8.4-V battery from a legacy 5-V USB port requires a boost charger. The BQ25887 is a highly integrated 2-A boosting, 1.5-MHz switch-mode battery charge management with cell balancing for 2-s Li-ion and Li-polymer battery. The I2C serial interface with charging and cell balancing (...)
使用指南: PDF
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EV2400 — 適用電池電量 (氣量) 計評估模組的 USB PC 介面板

The EV2400 EVM interface board enables an IBM-compatible or other type PC (with the required driver for its particular platform) to communicate with the Texas Instruments SMBus or I2C interface gas gauges via a Universal Serial Bus (USB) port. In addition to this board, PC software is required to (...)

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