SLUUBE0A November   2015  – August 2021 TPS549A20

 

  1.   Trademarks
  2. Introduction
  3. Description
    1. 2.1 Typical Applications
    2. 2.2 Features
  4. Electrical Performance Specifications
  5. Schematic
  6. Test Setup
    1. 5.1 Test Equipment
    2. 5.2 Recommended Test Setup
  7. Configurations
    1. 6.1 PMBus Address Selection
    2. 6.2 Mode Selection
    3. 6.3 VDD Pin Supply Selection
  8. Test Procedure
    1. 7.1 Line and Load Regulation and Efficiency Measurement Procedure
    2. 7.2 PMBUS Setup and Verification
    3. 7.3 Control-Loop Gain and Phase-Measurement Procedure
    4. 7.4 List of Test Points
    5. 7.5 Equipment Shutdown
  9. EVM Assembly Drawing and PCB Layout
  10. Bill of Materials
  11. 10Revision History

VDD Pin Supply Selection

The controller can be enabled and disabled by J7.

Table 6-3 Enable Selection
SET ON CONNECTIONENABLE SELECTION
R19 = 0 Ω(1)VDD pin connected to VIN pins(1)
R19 = OpenVDD pin disconnected to VIN pins
Default setting: the VDD pin connected to the VIN pins through R19.

For power-up, input J7 with proper voltage. The VDD pin input voltage range is from 4.5 V to 25 V.