SLVUAM8B December   2015  – August 2021 TPS54A20

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Before You Begin
    2. 1.2 Background
    3. 1.3 Performance Specification Summary
    4. 1.4 Modifications
      1. 1.4.1 Output Voltage Setpoint
      2. 1.4.2 On Time
      3. 1.4.3 Adjustable UVLO
  3. 2Test Setup and Results
    1. 2.1  Input/Output Connections
    2. 2.2  Efficiency
    3. 2.3  Output Voltage Load Regulation
    4. 2.4  Output Voltage Line Regulation
    5. 2.5  Load Transients
    6. 2.6  Loop Characteristics
    7. 2.7  Output Voltage Ripple
    8. 2.8  Input Voltage Ripple
    9. 2.9  Powering Up
    10. 2.10 Thermal Image
  4. 3Board Layout
    1. 3.1 Layout
  5. 4Schematic and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 Bill of Materials
  6. 5Revision History

2.1 Input/Output Connections

The TPS54A20EVM-770 is provided with input/output connectors and test points as shown in Table 2-1. A power supply capable of supplying greater than 2 A must be connected to J1 through a pair of 20 AWG wires or better. The load must be connected to J4 through a pair of 20 AWG wires or better. The maximum load current capability is 10 A. Wire lengths must be minimized to reduce losses in the wires. Test-point TP1 provides a place to monitor the VIN input voltages with TP2 providing a convenient ground reference. TP7 is used to monitor the output voltage with TP8 as the ground reference.

Table 2-1 EVM Connectors and Test Points
Reference DesignatorFunction
J1VIN input voltage connector. (See Table 1-1 for VIN range).
J22-pin header for enable. Connect EN to ground to disable, open to enable.
J3External VG+ header. To improve converter efficiency, an external 5V supply is recommended to be connected to the VG+ pin (J3-2) to GND (J3-1).
J4VOUT, 1.2 V at 10 A maximum.
TP1VIN test point.
TP2GND test point at VIN connector.
TP3PGOOD test point.
TP4SYNC test point.
TP5VG+ test point.
TP6Test point between voltage divider network and output. Used for loop response measurements.
TP7Output voltage test point.
TP8GND test point
TP9Test point at gate of transient load circuit.
TP10GND test point at input of transient load circuit.
TP11Test point at top of transient load circuit load resistor
TP12Test point at bottom (GND) of transient load circuit load resistor
TP13Analog ground (AGND) test point.