SLVUCA4 August   2021 TPS1653

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 REACH Compliance
    2. 1.2 EVM Features
    3. 1.3 Applications
  3. 2Description
  4. 3General Configurations
    1. 3.1 Physical Access
    2. 3.2 Test Equipment
      1. 3.2.1 Power Supplies
      2. 3.2.2 Meters
      3. 3.2.3 Oscilloscope
      4. 3.2.4 Loads
    3. 3.3 Test Setup
    4. 3.4 Test Procedure
      1. 3.4.1 Preliminary Tests
      2. 3.4.2 UVLO Tests
      3. 3.4.3 Current Limit Test with Step Load of 4 A to 7 A
      4. 3.4.4 Output Short-Circuit Protection Test
      5. 3.4.5 Start-Up With Short-Circuit On Output
  5. 4EVM Board Assembly Drawings and Layout
    1. 4.1 PCB Drawings
  6. 5Schematics
  7. 6Bill of Materials

3.4.1 Preliminary Tests

  1. Turn on the power supply and set the output voltage and the current limit according to Table 3-4.
    Table 3-4 Power Supply Setting for the TPS1653EVM
    EVMChannelVoltage Set PointPower Supply Current Limit
    TPS1653EVMCH148 V9 A
    CH248 V9 A
  2. Turn on the load and set the load resistance to 96 Ω ±1 Ω.
  3. Disable the power supply and load and hook up the TPS1653EVM assembly as shown in Figure 3-1.
  4. Make sure the default evaluation board jumper settings are as shown in Table 3-5.
    Table 3-5 Default Jumper Setting for the TPS1653EVM
    J1J2

    J3

    		J4J5J6
    CH1InstallInstall

    1-2

    		1-2InstallInstall
    J7J8

    J9

    		J10J11J12
    CH2InstallInstall

    1-2

    Install

    		1-2Install
  5. Enable the power supply and the load.
  6. Connect the negative probe of the DMM to test point TP8 or TP10, and the positive probe to the respective test points, and verify that the voltages shown in Table 3-6 are obtained.
    Table 3-6 TPS1653EVM DMM Readings at Different Test Points
    Voltage test on (CH1)Measured Voltage ReadingVoltage test on (CH2)Measured Voltage Reading
    VIN1 (TP1)48 V ±1-V DCVIN2 (TP11)48 V ±1-V DC
    VOUT1 (TP2)48 V ±1-V DCVOUT2 (TP12)48 V ±1-V DC
    FLTb1 (TP4)46.6 V ±0.5-V DCFLTb2 (TP14)46.6 V ±0.5-V DC
    SHDNb1 (TP6)2.7 V ±0.5-V DCSHDNb2 (TP17)2.7 V ±0.5-V DC
  7. Press the CH1/CH2 shutdown switch, S1/S2, and verify the CH1/CH2 output voltage, VOUT1/VOUT2, drops to zero. Release the S1/S2 switch and verify the output voltage resumes to nominal 48 V ±1 V.
  8. Disable the power supply and the load.