SBVU066A August   2020  – April 2021

 

  1.   Trademarks
  2. 1Introduction
  3. 2Performance Specification Summary
  4. 3Modifications
    1. 3.1 Output Voltage Setpoint
    2. 3.2 Mode Selection
  5. 4Test Setup and Results
    1. 4.1 Input/Output Connections
    2. 4.2 Start-Up
    3. 4.3 Shutdown
    4. 4.4 Load Transient Response
    5. 4.5 Output Voltage Ripple
  6. 5Board Layout
    1. 5.1 Layout
  7. 6Schematic and Bill of Materials
    1. 6.1 Schematic
    2. 6.2 Bill of Materials
  8. 7References
  9. 8Revision History

4.1 Input/Output Connections

The TPS51397AEVM is provided with input/output connectors and test points as shown in Table 4-1. A power supply capable of supplying greater than 10 A must be connected to J1 through a pair of 20-AWG wires or better. The load must be connected to J2 through a pair of 20-AWG wires. The maximum load current capability is 10 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 TP8 providing a convenient ground reference. TP5 is used to monitor the output voltage with TP11 as the ground reference.

In this user's guide, the device is set in Eco-mode with 500-KHz frequency by using a jumper at J4-1 and J4-2.

Table 4-1 Connection and Test Points
REFERENCE
DESIGNATOR		FUNCTION
J1VIN input connector (see Table 1-1 for VIN range.)
J2VOUT output connector. 5 V at 10-A maximum
J3Soft start selection. Remove the shunt to set the soft start time as internal default value.
J4MODE selection. Refer to Section 3.2.
J5EN control. Short pin2 and pin3 to disable. Short pin1 and pin2 to enable.
TP1VCC
TP2VIN terminal
TP3VIN test point
TP4VOUT terminal
TP5VOUT test point
TP6SW node test point
TP7Bode plot test point
TP8—11GND test point
TP12PGOOD test point
TP13—15GND test point
TP16EN test point