SLVU433A February   2011  – January 2022 TPS53125 , TPS53126 , TPS53127 , TPS53128 , TPS53129

 

  1.   Trademarks
  2. Introduction
    1. 1.1 Description
    2. 1.2 Application
    3. 1.3 Features
  3. Electrical Performance Specifications
  4. Schematics
  5. Connector and Test Point Descriptions
    1. 4.1 Enable Switches (SW1 and SW2)
    2. 4.2 Switching Frequency Select Switch (SW3)
    3. 4.3 Test Point Descriptions
      1. 4.3.1 Input Voltage Monitoring (TP3 and TP9)
      2. 4.3.2 Channel 1 Output Voltage Monitoring (TP4 and TP8)
      3. 4.3.3 Channel 2 Output Voltage Monitoring (TP6 and TP7)
      4. 4.3.4 Soft-Start Voltage Monitoring (TP1, TP2, and TP3)
      5. 4.3.5 Switching Node Monitoring (TP3, TP5, and TP11)
      6. 4.3.6 5-V Regulator Output Monitoring (TP3 and TP10)
  6. Test Setup
    1. 5.1 Equipment
      1. 5.1.1 Voltage Source
      2. 5.1.2 Meters
      3. 5.1.3 Loads
      4. 5.1.4 Oscilloscope and Probe
      5. 5.1.5 Recommended Wire Gauge
      6. 5.1.6 Other Test Equipment
    2. 5.2 Recommended Setup
  7. Test Procedure
    1. 6.1 Start-Up Procedure
    2. 6.2 Line/Load Regulation and Efficiency Measurement Procedure
    3. 6.3 Output Ripple Voltage Measurement Procedure
    4. 6.4 Shutdown Procedure
  8. Performance Data and Typical Characteristic Curves
    1. 7.1 Efficiency
    2. 7.2 Line and Load Regulation
    3. 7.3 Output Voltage Ripple
    4. 7.4 Switch Node Waveforms
  9. EVM Assembly Drawings and Layout
  10. Bill of Materials
  11. 10Revision History

EVM Assembly Drawings and Layout

Figure 8-1 through Figure 8-6 show the design of the TPS53128EVM-620 printed circuit board. The EVM has been designed using a 4-layer, 2-oz copper-clad circuit board of 3.5 inch by 2.7 inch to allow the user to easily view, probe, and evaluate the TPS53128 control IC in a practical application. Moving components to both sides of the PCB or using additional internal layers can offer additional size reduction for space constrained systems.

GUID-7FC69017-D923-44C0-BF49-1C7DC0D63F27-low.gifFigure 8-1 Top Assembly
GUID-EE79557C-C3B8-46B3-922E-3C36168A27B7-low.gifFigure 8-2 Bottom Assembly
GUID-ED8D91D4-922E-432A-89C4-8AFBEC5D7E1D-low.gifFigure 8-3 Top Layer
GUID-C688A5CF-4C20-434B-BAE7-AB0F69452683-low.gifFigure 8-4 Bottom Layer
GUID-7F01E2E1-0206-4C3C-94C2-19E17C25F9C4-low.gifFigure 8-5 Internal Layer 1
GUID-A496C937-1C1F-4196-90CF-DD8B41C54FB1-low.gifFigure 8-6 Internal Layer 2