SNOU173A October   2020  – December 2020 LM7310

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 EVM Applications
  3. 2Description
  4. 3Schematic
  5. 4General Configurations
    1. 4.1 Physical Access
    2. 4.2 Test Equipment and Set up
      1. 4.2.1 POWER SUPPLIES
      2. 4.2.2 METERS
      3. 4.2.3 OSCILLOSCOPE
      4. 4.2.4 LOADS
  6. 5Test Setup and Procedures
    1. 5.1 Startup Test
    2. 5.2 ORing of Two Power Supplies Test
    3. 5.3 Reverse Current Blocking Test
    4. 5.4 Output Short-Circuit Test
    5. 5.5 Input Reverse Polarity Test
  7. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  8. 7Bill Of Materials (BoM)
  9. 8Revision History

5.1 Startup Test

Use the following instructions to measure the inrush current during startup event:

  1. Set Jumper J2 position to desired slew rate as mentioned in Table 4-3.

  2. Pull EN/UVLO1 to GND to disable the device.

  3. Set the input supply voltage VIN to 12 V and current limit of 10 A. Enable the power supply.

  4. Release the EN/UVLO1 to GND connection.

  5. Observe the waveform at VOUT (TP7) and input current (using current probe) with an oscilloscope to measure the slew rate and rise time of the ideal diode with a given input voltage of 12 V.

Figure 5-2 shows an example of inrush current captured on the LM73100EVM.

GUID-20201209-CA0I-NT35-DTHK-KTBDTMW2MDN4-low.pngFigure 5-2 LM73100 Output Rise Profile (VIN = 12 V, CdVdT = 10 nF, COUT = 220 μF, No-Load)