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Texas Instruments bq25703A降压-升压充电控制器

Texas Instruments bq25703A NVDC I2C电池降压-升压充电控制器（含系统电源监控器和处理器）可为电池充电应用提供具有较少元件数量的高效解决方案。NVDC-1配置可将系统电压稳定在电池电压范围内，但不会低于系统最小电压。即便在电池完全放电或被取出时系统仍继续工作。当负载功率超过输入源额定值时，电池会进入补电模式并防止输入源过载。该器件通过USB适配器、高压USB PD电源和传统适配器等各种输入源为电池充电。在上电期间，充电器根据输入源和电池状况将转换器设置为降压、升压或降压-升压配置。在没有输入电源的情况下，bq25703A可通过1至4节电池支持On-the-Go (OTG) 功能，从而在VBUS上产生4.48V至20.8V电压。充电器在OTG模式下调节输出电压和输出电流。该器件可监控适配器电流、电池电流和系统电源。

Input sources for battery charging include a USB adapter, high voltage USB PD sources, and traditional adapters. Based on the input source and battery conditions during power-up, the charger sets the converter to buck, boost, or buck-boost configuration. The bq25703A supports On-the-Go (OTG) function from 1- to the 4-cell battery to generate 4.48V to 20.8V on VBUS in the absence of an input source. The charger regulates the output voltage and output current during OTG mode. The device monitors adapter current, battery current, and system power.

特性

  • Charge 1 to 4-cell battery from wide range of input sources
    • 3.5V to 24V Input operating voltage
    • Supports USB2.0, USB 3.0, USB 3.1 (Type C), and USB_PD input current settings
    • Seamless transition between buck and boost operation
    • Input current and voltage regulation (IDPM and VDPM) against source overload
  • Power/current monitor for CPU throttling
    • Comprehensive PROCHOT profile, IMVP8 compliant
    • Input and battery current monitor
    • System power monitor, IMVP8 compliant
  • Narrow-VDC (NVDC) power path management
    • Instant-on with no battery or deeply discharged battery
    • Battery supplements system when adapter is fully-loaded
    • Ideal diode operation in supplement mode
  • Power up USB port from battery (USB OTG)
    • Output 4.48V to 20.8V compatible with USB PD
    • Output current limit up to 6.35A
  • 800kHz or 1.2MHz Programmable switching frequency for 1µH to 2.2µH low profile inductor
  • Host control interface for flexible system configuration
    • I2C (bq25703A) Port for optimal system performance and status reporting
    • Hardware pin to set input current limit without EC control
  • High accuracy regulation and monitor
    • ±0.5% Charge voltage regulation
    • ±2% Input/charge current regulation
    • ±2% Input/charge current monitor
    • ±5% Power monitor
  • Safety
    • Thermal shutdown
    • Input, system, battery overvoltage protection
    • MOSFET Inductor overcurrent protection
  • Low battery quiescent current
  • Input Current Optimizer (ICO) to extract max input power
  • Charge any battery chemistry: Li+, LiFePO4, NiCd, NiMH, lead-acid
  • 32-Pin 4×4 WQFN Package

应用

  • Drones, BLUETOOTH® speakers, IP cameras, detachable, and tablet PCs and power bank
  • Industrial and medical equipment
  • Portable equipment With rechargeable batteries

Featured EVM

Texas Instruments bq2570xAEVM-732评估模块 (EVM)

使用bq2570x（一款NVDC降压-升压充电控制器）评估SMBus控制的降压-升压充电。

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发布日期: 2017-11-20 | 更新日期: 2022-07-11