TIDT295 August   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
    5. 1.5 Test Setup
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 VOUT Regulation
    3. 2.3 Thermal Images
  6. 3Waveforms
    1. 3.1 Start-up Waveforms
    2. 3.2 Output Voltage Ripple and Noise
    3. 3.3 Load Dynamic
    4. 3.4 Switching Node
    5. 3.5 Short-Circuit Protection

Description

This reference design is an integrated USB Type-C® power delivery (PD) and charging reference design for 1-5 cell batteries for applications such as power tool chargers, vacuum cleaners, portable power stations, so on and so forth.

The design incorporates a highly-integrated standalone TPS25750 USB Type-C and PD controller with a build-in fully-managed robust power path switch inside to reduce the size and number of external components. The power specification can easily be configured to the user's application through a web-based GUI, thus reducing the design complexity. The PD controller works with an external battery charger controller (BQ25731) through I2C communication. The BQ25731 supports a wide range input with a four-switch buck-boost configuration. The controller also supports a seamless transition from buck, boost, and buck-boost operation mode, thus providing a highly-efficient, highly-accurate and reliable charger. In addition to charging capabilities, the BQ25731 also supports USB OTG(On The Go) mode which adds benefits to the end-user experience. In general, this reference design can support charging batteries through a USB Type-C port and provide a maximum 60W output at OTG mode, the high integration and simple design will benefit low BOM(Bill of Material) cost, smaller size as well as accelerating time to market.