Texas Instruments bq25898/bq25898D I2C 제어식 충전기 IC

Texas Instruments bq25898/bq25898D I2C 제어식 단일 셀 충전기 IC는 단일 셀 리튬-이온 및 리튬-폴리머 베터리용 고집적 스위치 모드 배터리 충전 관리 및 시스템 전원 경로 관리 장치입니다. 이 장치는 고속 충전을 위한 높은 입력 전압을 지원합니다. 저 임피던스 전원 경로는 스위치 모드 운용 효율을 최적화하고 배터리 충전 시간을 줄이며 방전 단계 동안 배터리 수명을 연장시킵니다. 충전 및 시스템 설정 기능이 있는 I2C 직렬 인터페이스로 인해 이 장치는 실제적으로 유연한 솔루션이 되었습니다.

특징

  • High-efficiency 4A, 1.5MHz switch-mode buck charge
    • 92% charge efficiency at 3A and 91% charge efficiency at 4A charge current
    • Optimize for high voltage input (9V/12V)
    • Low-power PFM mode for light load operations
  • USB On-the-Go (OTG) with adjustable output from 4.5V to 5.5V
    • Selectable 500KHz / 1.5MHz boost converter with up to 2.4A output
    • 93% boost efficiency at 5V at 1A output
    • Accurate hiccup mode overcurrent protection
  • Single input to support USB input and adjustable high voltage adapters
    • Support 3.9V to 14V input voltage range
    • Input current limit (100mA to 3.25A with 50mA resolution) to support USB2.0, USB3.0 standard, and high voltage adapters
    • Maximum power tracking by input voltage limit up to 14V for a wide range of adapters
    • Auto-detect USB SDP, CDP, DCP, and non-standard adapters (bq25898)
    • Programmable D+/D- drivers for non-standard adapter handshake
  • Remote battery sensing
  • Input Current Optimizer (ICO) to maximize input power without overloading adapters
  • Resistance compensation (IRCOMP) from charger output to cell terminal
  • Highest battery discharge efficiency with 5mΩ battery discharge MOSFET up to 9A
  • Integrated ADC for system monitor (voltage, temperature, charge current)
  • Narrow VDC (NVDC) power path management
    • Instant-on works with no battery or deeply discharged battery
    • Ideal diode operation in battery supplement mode
  • BATFET control to support ship mode, wake up, and full system reset
  • Flexible autonomous and I2C mode for optimal system performance
  • High integration includes all MOSFETs, current sensing, and loop compensation
  • 12µA low battery leakage current to support ship mode
  • High accuracy
    • ±0.5% charge voltage regulation
    • ±5% charge current regulation
    • ±7.5% input current regulation
  • Safety
    • Battery temperature sensing for charge and boost mode
    • Thermal regulation and thermal shutdown
    • Available in 2.8mm×2.5mm 42-ball DSBGA package

애플리케이션

  • Smartphone
  • Tablet PC
  • Portable internet devices

Simplified Schematic

계통도 - Texas Instruments bq25898/bq25898D I2C 제어식 충전기 IC
게시일: 2016-05-23 | 갱신일: 2022-03-11