TIDT270 April   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
  5. 2Testing and Results
    1. 2.1 Charge Efficiency
    2. 2.2 OTG Efficiency
    3. 2.3 Thermal Images
  6. 3Waveforms
    1. 3.1 Start-up
    2. 3.2 Shutdown
    3. 3.3 Charge Enable
    4. 3.4 Charge Disable
    5. 3.5 Typical Charge
    6. 3.6 Typical OTG
    7. 3.7 OTG Transient

Description

This battery charger reference design is designed for a 5- to 24-VIN, 240-W power tool, featuring the BQ25731—1-5 cell NVDC buck-boost battery charge controller. This controller enables a high-power, high-efficiency, and high-density design. PMP22805 delivers 240 W, with 98% efficiency, and fits in a compact 1.08 in × 1.68 in (27.4 mm × 42.7 mm) form factor. The USB On-The-Go (OTG) capability makes it a power bank. This design is ideal for power tools where high-power, high-efficiency, and high-density are top priorities. The design also supports 1-5S battery and accepts a wide input range such as USB-Type C® power delivery (PD) interface.