SLVU192B February   2007  – January 2022 TPS40077

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Description
    2. 1.2 Applications
    3. 1.3 Features
  3. 2TPS40077EVM-001 Electrical Performance Specifications
  4. 3Schematic
    1. 3.1 Adjusting Output Voltage (R3 and R13)
    2. 3.2 Disable (J3)
    3. 3.3 Test Set Up
      1. 3.3.1 Equipment
        1. 3.3.1.1 Voltage Source
        2. 3.3.1.2 Meters
        3. 3.3.1.3 Loads
        4. 3.3.1.4 Oscilloscope
        5. 3.3.1.5 Recommended Wire Gauge
    4. 3.4 Equipment Setup
      1. 3.4.1 Procedure
      2. 3.4.2 Diagram
    5. 3.5 Start-Up/Shut Down Procedure
    6. 3.6 Control Loop Gain and Phase Measurement Procedure
    7. 3.7 Equipment Shutdown
  5. 4TPS40077EVM Typical Performance Data and Characteristic Curves
    1. 4.1 Efficiency
    2. 4.2 Line and Load Regulation
    3. 4.3 Output Ripple
    4. 4.4 Transient Response
    5. 4.5 Bode Plot
  6. 5EVM Assembly Drawings and Layout
  7. 6List of Materials
  8. 7Revision History

3.4.1 Procedure

  1. Working at an ESD workstation, make sure that any wrist straps, bootstraps, or mats are connected referencing the user to earth ground before power is applied to the EVM. An electrostatic smock and safety glasses should also be worn.
  2. Prior to connecting the DC input source, V12V_IN, it is advisable to limit the source current from V12V_IN to 5.0-A maximum. Make sure V12V_IN is initially set to 0 V and connected as shown in Figure 3-3.
  3. Connect an Ammeter A1 as shown in Figure 3-3.
  4. Connect Voltmeter V1 to TP1 and TP2 as shown in Figure 3-3.
  5. Connect LOAD1 to J2 as shown in Figure 3-3. Set LOAD1 to constant current mode to sink 0 A DC before V12V_IN is applied.
  6. Connect Voltmeter V2 to Output J2 as shown in Figure 3-3.
  7. Connect an oscilloscope probe to TP9 and TP10 as shown in Figure 3-2.