SNVU739A October   2020  – August 2021 LM5157-Q1

 

  1.   Trademarks
  2. 1Features and Electrical Performance
    1. 1.1 Electrical Parameters
    2. 1.2 Configuration Points
  3. 2Application Schematic
  4. 3EVM Picture
  5. 4Test Setup and Procedure
    1. 4.1 Test Setup
    2. 4.2 Test Equipment
  6. 5Test Results
    1. 5.1 Efficiency Curve
    2. 5.2 Load Regulation Curve
    3. 5.3 Thermal Performance
    4. 5.4 Steady State Waveforms
    5. 5.5 Start-Up Waveforms
    6. 5.6 Load Transient Waveforms
    7. 5.7 AC Loop Response Curves
  7. 6Design Files
    1. 6.1 Schematic
    2. 6.2 Bill of Materials
  8. 7Revision History

4.2 Test Equipment

Power Supply: The input voltage source (VIN) should be a variable supply capable of 0 V to 10 V and source at least 10 A.

Multi-meters:

  • Voltmeter 1: Input voltage, connect from VIN+ to GND.
  • Voltmeter 2: Output voltage, connect from VOUT+ to GND.
  • Ammeter 1: Input current, must be able to handle 10 A. Shunt resistor can be used as needed.
  • Ammeter 2: Output current, must be able to handle 2 A. Shunt resistor can be used as needed.

Electronic Load: The load should be constant resistance (CR) or constant current (CC) capable. It should safely handle 2 A at 12 V.

Oscilloscope: 20-MHz bandwidth and AC coupling. Measure the output voltage ripple directly across an output capacitor with a short ground lead. It is not recommended to use a long-leaded ground connection due to the possibility of noise being coupled into the signal. To measure other waveforms, adjust the oscilloscope as needed.