SLUU224A May   2005  – March 2022 TPS40100

 

  1.   Trademarks
  2. 1Introduction
  3. 2Description
    1. 2.1 Applications
    2. 2.2 Features
      1. 2.2.1 Using Remote Sense (J3)
      2. 2.2.2 Simultaneous Tracking (J3)
      3. 2.2.3 Enable (SW2)
      4. 2.2.4 Margin Up/Down (J4)
      5. 2.2.5 Power Good (J1)
      6. 2.2.6 Synchronization (J1)
  4. 3Electrical Performance Specifications
  5. 4Schematic
  6. 5Test Setup
    1. 5.1 Equipment
      1. 5.1.1 Voltage Source (VIN)
      2. 5.1.2 Meters
      3. 5.1.3 Loads (LOAD1)
      4. 5.1.4 Recommended Wire Gauge
      5. 5.1.5 Other
    2. 5.2 Equipment Setup
      1. 5.2.1 Initial EVM Jumper and Switch Settings
      2. 5.2.2 Procedure
      3. 5.2.3 Start-Up and Shutdown Procedure
      4. 5.2.4 Equipment Shutdown
    3. 5.3 Other Tests
      1. 5.3.1 Adjusting Output Voltage (R1 and R3)
      2. 5.3.2 Remote Sense Test Setup
      3. 5.3.3 Voltage Tracking Test Setup
        1. 5.3.3.1 Single Unit Tracking (Charge)
        2. 5.3.3.2 Single Unit Tracking (Discharge)
      4. 5.3.4 Enable and Disable Test Setup
        1. 5.3.4.1 Power-On Enable
      5. 5.3.5 Margin Test Setup
        1. 5.3.5.1 Margin Up 5%
      6. 5.3.6 Power Good and Synchronization Test Setup
        1. 5.3.6.1 Synchronization
  7. 6TPS40100EVM Typical Performance Data and Characteristics Curves
    1. 6.1 Efficiency
    2. 6.2 Line and Load Regulation
    3. 6.3 Loop Stability
  8. 7EVM Assembly Drawings and Layout
  9. 8List of Materials
  10. 9Revision History

5.3.2 Remote Sense Test Setup

In order for the remote sense feature of the TPS40100EVM-001 to function properly, it is essential that the test setup be configured correctly. Use the following steps to set up the remote sense:

  1. Ensure that the remote sense jumpers J7 and J8 are shunted across pins 1 and 2.
  2. Connect load wires with a maximum length of six inches from pin 2 of J5 (+Vout) to the positive terminal of the load. Connect the same length of wire from pin 3 of J5 (RTN) to the negative terminal of the load. Be sure to properly gauge the load wires for 10 A. AWG#16 is recommended.
  3. Connect a sense wire from J5 pin 1 to the positive terminal of the load. This is the +senseline. Be sure to not exceed six inches in length. AWG#22 wire is recommended.
  4. Connect a sense wire from J5 pin 4 to the negative terminal of the load. This is the –sense line. Be sure to not exceed six inches in length. AWG#22 wire is recommended.
  5. Monitor voltage at TP13 and TP14 using a voltmeter. This will be the regulated voltage at the load.
  6. Monitor voltage at J5 pins 2 and 3. This is the voltage at the output connector. This voltage will increase based on the load.
  7. Set load to 0 A, constant current. Both monitoring points should read very close to the same value.
  8. Increase the load gradually and observe the difference in voltages present at the monitoring points. The set voltage (3.3 V) will be regulated at the load; this will be noted at TP13 and TP14. The direct output of the converter (J5 pins 2 and 3) will read a higher voltage. As IR losses increase over load wires and terminals, the direct output of the converter will compensate by raising the voltage to keep within regulation at the load.
CAUTION: Long distance runs from the output of the converter and the load will cause erratic behavior. This can show up as pulse width jitter or an oscillatory effect on the ripple voltage. If this condition occurs, check the setup and make adjustments. Please see Figure 5-3 for test setup.
GUID-20220228-SS0I-CLK7-51DB-JJKTVCG8XBGK-low.gif Figure 5-3 TPS40100EVM-001 Recommended Remote Test Setup