SLVUD43 February   2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Modification
    2. 2.2 Connector, Test Point, and Jumper Descriptions
      1. 2.2.1 Connector and Test Point Descriptions
      2. 2.2.2 Jumper Configuration
        1. 2.2.2.1 JP2 (ENABLE)
        2. 2.2.2.2 JP5 and JP1 (External Feedback and Internal Feedback Selection)
    3. 2.3 Test Procedure
  9. 3Software
    1. 3.1 Software User Interface
      1. 3.1.1 Install USB2ANY Explorer
      2. 3.1.2 GUI Installation
      3. 3.1.3 Interface Hardware Setup
      4. 3.1.4 User Interface Operation
      5. 3.1.5 Register Map Screen
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1.     Trademarks

1.4 Device Information

The TPS55285 is a synchronous buck-boost converter which integrates four MOSFET switches, providing a compact device for a variety of applications, especially for USB Power Delivery (USB PD) application. The device has up to 22V input voltage capability. Through the I2C interface, the output voltage can be programmed from 0.8V to 22V with 10mV step, and the output current limit can be programmed up to 6.35A with 50mA step. The switching frequency is set by FSW bit in register 06H with four options: 400kHz, 800kHz, 1.6MHz, 2.2MHz.The spread spectrum function is optional to minimize peak EMI. The input/output over-voltage protection, average inductor current limit, cycle-by-cycle peak current limit, and output short circuit protection are provided. Refer to TPS55285 22-V, 8-A Buck-Boost Converter with I2C Interface Data Sheet for more detailed information of the TPS55285 fully integrated buck-boost converter.

The factory default settings of the TPS55285EVM allow the operation with an input voltage range from 2.4V to 22V. Fine-tuning of the output voltage can be realized by adjusting the internal reference voltage and feedback ratio. In addition, users can set register to adjust the switching frequency. To meet the current ripple requirement, the inductor also needs to change according to the switching frequency, as well as the external compensation parameter to obtain enough phase margin and gain margin.