SLUU522A August   2011  – January 2022 TPS53355

 

  1.   Trademarks
  2. 1 Description
    1. 1.1 Typical Applications
    2. 1.2 Features
  3. 2 Electrical Performance Specifications
  4. 3 Schematic
  5. 4 Test Setup
    1. 4.1 Test Equipment
    2. 4.2 Recommended Test Setup
  6. 5 Configurations
    1. 5.1 Switching Frequency Selection
    2. 5.2 Soft-Start Selection
    3. 5.3 Mode Selection
    4. 5.4 Enable Selection
  7. 6 Test Procedure
    1. 6.1 Line/Load Regulation and Efficiency Measurement Procedure
    2. 6.2 Control Loop Gain and Phase Measurement Procedure
    3. 6.3 Test Point List
    4. 6.4 Equipment Shutdown
  8. 7 Performance Data and Typical Characteristic Curves
    1. 7.1  Efficiency
    2. 7.2  Load Regulation
    3. 7.3  Line Regulation
    4. 7.4  Enable Turn-On/Turn-Off
    5. 7.5  Output Ripple
    6. 7.6  Switching Node
    7. 7.7  Output Transient With Auto-Skip Mode
    8. 7.8  Output Transient With FCCM Mode
    9. 7.9  Output 0.75-V Prebias Turn-On
    10. 7.10 Output Overcurrent and Short-Circuit Protection
    11. 7.11 Bode Plot
    12. 7.12 Thermal Image
  9. 8 EVM Assembly Drawing and PCB Layout
  10. 9 Bill of Materials
  11. 10Revision History

4.2 Recommended Test Setup

GUID-F0E8B9E1-9A23-4ACC-9D13-DAC4C3A48E7C-low.gifFigure 4-2 TPS53355EVM-743 Recommended Test Setup

Figure 4-2 is the recommended test setup to evaluate the TPS53355EVM-743. Working at an ESD workstation, ensure that any wrist straps, bootstraps, or mats are connected referencing the user to earth ground before power is applied to the EVM.

Input Connections:

  1. Prior to connecting the dc input source VIN, it is advisable to limit the source current from VIN to 10 A maximum. Ensure that VIN is initially set to 0 V and connected as shown in Figure 4-2.
  2. Connect a voltmeter V1 at TP1 (VIN) and TP2 (GND) to measure the input voltage.
  3. Connect a current meter A1 to measure the input current.

Output Connections:

  1. Connect the load to J3, and set Load to constant resistance mode to sink 0 ADC before VIN is applied.
  2. Connect a voltmeter V2 at TP5 (VOUT) and TP7 (GND) to measure the output voltage.

Other Connections:

Place a fan as shown in Figure 4-2, and turn it on, making sure that air is flowing across the EVM.