SLUUAS1C October   2013  – November 2021

 

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

6.3 VDD Pin Supply Selection

The controller can be enabled and disabled by J7.

Table 6-3 Enable Selection
SET ON CONNECTION ENABLE SELECTION
R19 = 0 Ω(1) VDD pin connected to VIN pins(1)
R19 = Open VDD pin disconnected to VIN pins
(1) 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.