SNVU793 September   2021 LM5158

 

  1.   Trademarks
  2. 1Introduction
  3. 2Electrical Parameters
  4. 3Application Schematic
  5. 4EVM Picture
  6. 5Test Setup and Procedure
    1. 5.1 EVM Test Setup Schematic
    2. 5.2 Test Equipment
  7. 6Test Data and Performance Curves
    1. 6.1 Efficiency
    2. 6.2 Output Regulation
    3. 6.3 Steady-State Waveforms
    4. 6.4 Start-Up Waveforms
    5. 6.5 Dynamic Responses
    6. 6.6 Short-Circuit Protection
    7. 6.7 Bode Plots
    8. 6.8 Thermal Image
  8. 7Schematic
  9. 8Bill of Materials
  10. 9EVM Layout

5.2 Test Equipment

Power Supply: Use an input voltage source that is a variable supply capable of 0 V to 16 V and sources at least 5 A.

Multimeters:

  • Voltmeter 1: Non-isolated 10-V main output voltage VO1, connect from TP18 (+) to TP19 (–).
  • Voltmeter 2: Isolated 20-V output voltage VO2, connect from TP3 (+) to TP5 (–).
  • Voltmeter 3: Isolated 20-V output voltage VO3, connect from TP6 (+) to TP8 (–).
  • Voltmeter 4: Isolated 20-V output voltage VO4, connect from TP12 (+) to TP13 (–).
  • Voltmeter 5: Input voltage VI, connect from TP2 (+) to TP7 (–).
  • Ammeter 1: VO1 main output current, must be able to handle 1 A
  • Ammeter 2: VO2 output current, must be able to handle 0.5 A
  • Ammeter 3: VO3 output current, must be able to handle 0.5 A
  • Ammeter 4: VO4 output current, must be able to handle 0.5 A
  • Ammeter 5: Input current, must be able to handle 3 A

Loads: Electronic loads, pure resistive loads, or a combination of both, can be used at the four outputs.

  • An electronic load can be used for each output rail. The electronic load should be constant resistance (CR) or constant current (CC) capable. It should safely handle 0.5 A at 20 V.
  • Resistive load can also be used. Limit the minimum resistance for each output, which corresponds to the maximum power, with the following:
    • Load 1: 40 Ω or 250 mA
    • Load 2: 266.7 Ω or 75 mA
    • Load 3: 266.7 Ω or 75 mA
    • Load 4: 133.3 Ω or 150 mA