SBAU227A March   2014  – June 2021

 

  1.   Trademarks
  2. 1Introduction
  3. 2Performance Specification Summary
  4. 3Modifications
    1. 3.1 Output Voltage Set Point
    2. 3.2 Output Voltage Set Point Using I2C Interface
      1. 3.2.1 PC Preparation
      2. 3.2.2 Connect the PC
      3. 3.2.3 Voltage Scaling Procedure
    3. 3.3 Output Filter and Closed Loop Response
  5. 4Test Setup and Results
    1. 4.1 Input/Output Connections
    2. 4.2 Start Up Procedure
    3. 4.3 Efficiency
    4. 4.4 Load Regulation
    5. 4.5 Line Regulation
    6. 4.6 Load Transient Response
    7. 4.7 Output Voltage Ripple
    8. 4.8 Start Up
    9. 4.9 Shut Down
  6. 5Board Layout
    1. 5.1 Board Layout
  7. 6Schematic, Bill of Materials and Reference
    1. 6.1 Schematic
    2. 6.2 Bill of Materials
    3. 6.3 Reference
  8. 7Revision History

4.1 Input/Output Connections

The TPS56C20EVM-614 provides input/output connectors and test points as shown in Table 4-1. The design requires a power supply capable of supplying 4 A to connect to J1 through a pair of 20-AWG wires. The design requires the load to connect to J3 through a pair of 20-AWG wires. The maximum load current capability is 12 A. Wire lengths must be minimized to reduce losses in the wires. Test point TP3 provides a place to monitor the VIN input voltages with TP4 (which provides a convenient ground reference). The design uses TP6 to monitor the output voltage with TP7 as the ground reference.

Table 4-1 Connection and Test Points
Reference DesignatorFunction
J1PVIN input voltage connector (See Table 1-1 for PVIN range)
J2VIN input voltage connector. Not normally used
J3VOUT, 1.1V at 12A maximum
JP1PVIN to VIN jumper. Normally closed
JP2I2C interface pull up jumper for SDA
JP3I2C interface pull up jumper for SCL
JP4I2C interface grounding jumper for A1
JP5I2C interface grounding jumper for A0
JP6Enable Jumper. Close to disable, open to enable
TP1GND test point for VIN connector
TP2VIN test point
TP3PVIN test point
TP4GND test point for PVIN connector
TP5SW test point
TP6Output voltage test point at VOUT connector
TP7GND test point at VOUT connector
TP9Analog GND test point
TP10Test point in voltage divider network. Used for loop response measurements