SLVUCS0 july   2023 TPS552872 , TPS552872-Q1

 

  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 and Test Point Descriptions
    3. 2.3 Jumper Configuration
      1. 2.3.1 JP1 (ENABLE)
      2. 2.3.2 JP5 (SYNC)
      3. 2.3.3 JP6 (MODE)
      4. 2.3.4 JP7 (EXTVCC)
    4. 2.4 Test Procedure
  9. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials
  10. 4Additional Information
    1.     Trademarks

1.4 Device Information

The TPS552872 is a synchronous buck-boost converter which integrates four MOSFET switches, providing a compact device for a variety of applications. The device employs an average current mode control scheme. The switching frequency is programmable from 200 kHz to 2.2 MHz by an external resistor and can be synchronized to an external clock. The spread spectrum function is optional to minimize peak EMI. The output over-voltage protection, average inductor current limit, cycle-by-cycle peak current limit, and output short circuit protection are provided. Refer to TI product data sheet for more detailed information of the TPS552872 and TPS552872-Q1 fully integrated buck-boost converter.

The TPS552872EVM uses a small inductor and small capacitors with 2.0MHz switching frequency. The factory default settings of the EVM allow the operation with an input voltage range from 3 V to 36 V. Fine-tuning of the output voltage can be realized by adjusting the external resistor values at the FB pin. In addition, the users can modify the EVM to adjust the switching frequency by changing resistor value at the FSW pin. 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.