SLVU953A October   2013  – May 2021 TPS65580 , TPS65581

 

  1.   Trademarks
  2. 1Introduction
  3. 2Performance Specification Summary
  4. 3Modifications
    1. 3.1 Output Voltage Setpoint
  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 Input Voltage Ripple
    8. 4.8 Start-Up
  6. 5Board Layout
    1. 5.1 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 TPS65581EVM-575 is provided with input/output connectors and test points as shown in Table 4-1. A power supply capable of supplying 5 A must be connected to J1 through a pair of 20-AWG wires. The loads must be connected to J2, J3 and J4 through pairs of 20-AWG wires. The maximum load current capability is for each channel is shown in Table 1-1. 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. Test points TP11, TP15 and TP19 are used to monitor the output voltage for each of the three channels. Test points TP12, TP18 and TP20 are used as the ground reference for each of the three channels.

Table 4-1 Connections and Test Points
Reference DesignatorFunction
J1VIN (see Table 1-1 for VIN range)
J2CH1 VOUT, 3.3 V at 1.5-A maximum
J3CH2 VOUT, 1.2 V at 2.5-A maximum
J4CH3 VOUT, 1.5 V at 1.5-A maximum
JP1CH1 EN control. Jumper JP1-2 to JP1-3 to disable, jumper JP1-2 to JP1-1 to enable.
JP2CH2 EN control. Jumper JP2-2 to JP2-3 to disable, jumper JP2-2 to JP2-1 to enable.
JP3CH3 EN control. Jumper JP3-2 to JP3-3 to disable, jumper JP3-2 to JP3-1 to enable.
TP1VIN test point at VIN connector
TP2GND test point at VIN
TP3CH1 EN test point
TP4CH2 EN test point
TP5CH3 EN test point
TP6Power good test point
TP7Power ground test point
TP8Analog ground test point
TP9CH1 switch node test point
TP10CH1 loop response test point
TP11CH1 output voltage test point
TP12CH1 ground test point at output connector
TP13CH2 switch node test point
TP14CH2 loop response test point
TP15CH2 output voltage test point
TP16CH2 ground test point at output connector
TP17CH3 switch node test point
TP18CH3 loop response test point
TP19CH3 output voltage test point
TP20CH3 ground test point at output connector