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电池管理 IC
电池充电器 IC

BQ25970

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用于并联充电应用并支持外部过压保护的 I2C 单节 8A 开关电容器电池充电器

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BQ25970

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产品详情

Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Charge current (max) (A) 8 Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, Integrated ADC Vin (min) (V) 3.2 Vin (max) (V) 12 Absolute max Vin (max) (V) 20 Control topology Flash Charger Battery charge voltage (min) (V) 3.5 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) 8 Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, Integrated ADC Vin (min) (V) 3.2 Vin (max) (V) 12 Absolute max Vin (max) (V) 20 Control topology Flash Charger Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.65 Control interface I2C Operating temperature range (°C) -40 to 85
DSBGA (YFF) 56 10.7999999999999988 mm² (— mm × — mm)
  • 97% Efficient power stage for 8-A fast charge
  • Patent pending switched cap charger architecture optimized for 50% duty cycle
    • Input voltage is 2x battery voltage (3.5 V to 4.65 V)
    • Output current is 2x of input current (up to
      4.5 A)
    • Reduces power loss across the cable
  • Integrated programmable protection features for safe operation
    • Input over-voltage protection (BUS_OVP)
    • Input over-current protection (BUS_OCP) with adjustable alarm
    • Input over-voltage with external OVP FET (VAC_OVP up to 17 V, BQ25970 only)
    • Battery over-voltage protection (BAT_OVP) with adjustable alarm
    • Output over-voltage (VOUT_OVP)
    • Input over-current protection (BUS_OCP) with adjustable alarm
    • IBAT over-current protection (BAT_OCP) with adjustable alarm
    • Switching MOSFET cycle by cycle current limit
    • Battery temperature monitoring
    • Connector Temperature Monitoring
  • Programmable settings for system optimization
    • Optional VBATREG and IBATREG regulation for system load and wall adapter transients (BQ25970 only with External OVP FET)
    • STAT, FLAG, and MASK options for interrupts
    • ADC Readings and configuration
  • Integrated 12-bit effective analog-to digital converter (ADC)
    • ±0.5% BUS Voltage
    • ±0.5% VOUT Voltage
    • –0.4% to 0.2% BAT Voltage with differential sensing
    • ±1.5% BAT Current at 6 A with external RSENSE
    • ±1% BAT Temperature
    • ±1% BUS Temperature
    • ±4°C Die temperature
  • 97% Efficient power stage for 8-A fast charge
  • Patent pending switched cap charger architecture optimized for 50% duty cycle
    • Input voltage is 2x battery voltage (3.5 V to 4.65 V)
    • Output current is 2x of input current (up to
      4.5 A)
    • Reduces power loss across the cable
  • Integrated programmable protection features for safe operation
    • Input over-voltage protection (BUS_OVP)
    • Input over-current protection (BUS_OCP) with adjustable alarm
    • Input over-voltage with external OVP FET (VAC_OVP up to 17 V, BQ25970 only)
    • Battery over-voltage protection (BAT_OVP) with adjustable alarm
    • Output over-voltage (VOUT_OVP)
    • Input over-current protection (BUS_OCP) with adjustable alarm
    • IBAT over-current protection (BAT_OCP) with adjustable alarm
    • Switching MOSFET cycle by cycle current limit
    • Battery temperature monitoring
    • Connector Temperature Monitoring
  • Programmable settings for system optimization
    • Optional VBATREG and IBATREG regulation for system load and wall adapter transients (BQ25970 only with External OVP FET)
    • STAT, FLAG, and MASK options for interrupts
    • ADC Readings and configuration
  • Integrated 12-bit effective analog-to digital converter (ADC)
    • ±0.5% BUS Voltage
    • ±0.5% VOUT Voltage
    • –0.4% to 0.2% BAT Voltage with differential sensing
    • ±1.5% BAT Current at 6 A with external RSENSE
    • ±1% BAT Temperature
    • ±1% BUS Temperature
    • ±4°C Die temperature

The BQ2597x is a 97% efficient, 8-A battery charging solution using a switched cap architecture. This architecture and the integrated FETs are optimized to enable a 50% duty cycle, allowing the cable current to be half the current delivered to the battery, reducing the losses over the charging cable as well as limiting the temperature rise in the application.

The dual-phase architecture reduces the input cap requirements as well as reducing the output voltage ripple. When used with a standard charger such as the BQ2589x, the system enables the fastest charging at the lowest power loss from pre-charge through CC, CV, and termination.

The device integrates all the necessary protection features to ensure safe charging, including input over-voltage and over-current protection, output over-voltage and over-current protection, temperature sensing for the battery and cable, and monitoring the die temperature.

The device includes a 12-bit effective analog-to-digital converter (ADC) to provide bus voltage, bus current, output voltage, battery voltage, battery current, bus temperature, bat temperature, die temperature, and other calculated measurements needed to manage the charging of the battery from the smart wall adapter or power bank.

The BQ2597x is a 97% efficient, 8-A battery charging solution using a switched cap architecture. This architecture and the integrated FETs are optimized to enable a 50% duty cycle, allowing the cable current to be half the current delivered to the battery, reducing the losses over the charging cable as well as limiting the temperature rise in the application.

The dual-phase architecture reduces the input cap requirements as well as reducing the output voltage ripple. When used with a standard charger such as the BQ2589x, the system enables the fastest charging at the lowest power loss from pre-charge through CC, CV, and termination.

The device integrates all the necessary protection features to ensure safe charging, including input over-voltage and over-current protection, output over-voltage and over-current protection, temperature sensing for the battery and cable, and monitoring the die temperature.

The device includes a 12-bit effective analog-to-digital converter (ADC) to provide bus voltage, bus current, output voltage, battery voltage, battery current, bus temperature, bat temperature, die temperature, and other calculated measurements needed to manage the charging of the battery from the smart wall adapter or power bank.

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更多信息和样片供货情况

  • 可提供完整数据表和其他信息。立即申请
  • 如果您想使用符合通用标准、高达 20V 的 USB Type-C PD 端口为充电器供电，请考虑 TPS25750

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技术文档

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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 BQ25970, BQ25971 I2C Controlled Single Cell High Efficiency 8-A Switched Cap Fast Chargers With ADC 数据表 (Rev. B) PDF | HTML 2020-4-20
应用手册 如何使用 BQ25970 进行闪充 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2022-10-27
应用手册 具有高效率电荷泵（Charge Pump Charger）充电系统介绍 2018-8-6

设计与开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

参考设计

TIDA-01582 — 适用于 USB 电力输送可编程电源的开关电容快速充电参考设计

此参考设计旨在展示在智能手机应用中使用开关电容快速充电拓扑时的总体系统性能。此系统包含使用支持 USB 电力输送 (PD) 可编程电源 (PPS) 规格的智能壁式适配器，用于减少充电电缆的损耗，并降低智能手机的损耗和温升。bq25970 是 TI 推出的首款可为电池提供高达 8A 充电电流的开关电容充电器。
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DSBGA (YFF) 56 Ultra Librarian
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