SLUUCD3A September   2020  – April 2021 TPS546A24A

 

  1.   Trademarks
  2. 1 Description
    1. 1.1 Before You Begin
    2. 1.2 Typical Applications
    3. 1.3 Features
  3. 2 Electrical Performance Specifications
  4. 3 Schematic
  5. 4 Test Setup
    1. 4.1 Test and Configuration Software
      1. 4.1.1 Description
      2. 4.1.2 Features
    2. 4.2 Test Equipment
      1. 4.2.1 Voltage Source
      2. 4.2.2 Multimeters
      3. 4.2.3 Output Load
      4. 4.2.4 Oscilloscope
      5. 4.2.5 Fan
      6. 4.2.6 USB-to-GPIO Interface Adapter
      7. 4.2.7 Recommended Wire Gauge
    3. 4.3 Tip and Barrel Measurement
    4. 4.4 List of Test Points, Jumpers, and Connectors
    5. 4.5 Evaluating Split Rail Input
    6. 4.6 Configuring EVM to Overdrive VDD5
    7. 4.7 Powering from a Single 3.3-V Input Power Supply
  6. 5 EVM Configuration Using the Fusion GUI
    1. 5.1 Configuration Procedure
  7. 6 Test Procedure
    1. 6.1 Line and Load Regulation and Efficiency Measurement Procedure
    2. 6.2 Efficiency Measurement Test Points
    3. 6.3 Control Loop Gain and Phase Measurement Procedure
  8. 7 Performance Data and Typical Characteristic Curves
    1. 7.1  Efficiency
    2. 7.2  Load and Line Regulation (Measured Between TP27 and TP26)
    3. 7.3  Transient Response
    4. 7.4  Control Loop Bode Plot
    5. 7.5  Output Ripple
    6. 7.6  Power MOSFET Drain-Source Voltage
    7. 7.7  Control On
    8. 7.8  Control Off
    9. 7.9  Control On With Pre-biased Output
    10. 7.10 Thermal Image
  9. 8 EVM Assembly Drawing and PCB Layout
  10. 9 Bill of Materials
  11. 10Using the Fusion GUI
    1. 10.1  Opening the Fusion GUI
    2. 10.2  General Settings
    3. 10.3  Changing ON_OFF_CONFIG
    4. 10.4  Pop-up for Some Commands While Conversion is Enabled
    5. 10.5  SMBALERT# Mask
    6. 10.6  Device Info
    7. 10.7  Phase Commands
    8. 10.8  All Config
    9. 10.9  Pin Strapping
    10. 10.10 Monitor
    11. 10.11 Status
  12. 11Revision History

4.4 List of Test Points, Jumpers, and Connectors

Table 4-1 lists the test point functions.

Table 4-1 Test Point Functions
Test Point Type Name Description
TP1 T-H Loop EXT_AVIN AVIN measurement point
TP2 T-H Loop GND GND reference
TP3 T-H Loop CNTL CNTL signal on J2 header
TP4 T-H Loop DATA DATA signal on J2 header
TP5 T-H Loop CLK CLK signal on J2 header
TP6 T-H Loop SMBALRT SMBALERT signal on J2 header
TP7 T-H Loop MSEL2 MSEL2 measurement point for U1
TP8 T-H Loop VSEL VSEL measurement point for U1
TP9 T-H Loop PG PGOOD signal of U1
TP10 T-H Loop VSHARE VSHARE measurement point. Sensitive signal
TP11 T-H Loop SYNC External SYNC input
TP12 T-H Loop PVIN VIN+ measurement point
TP13 T-H Loop VDD5 VDD5 measurement point or external VDD5 input
TP14 T-H Loop SW Switching node, reference to TP15
TP15 T-H Loop GND GND reference for switch node measurement
TP16 T-H Loop CH_A INPUT for small signal loop gain measurements (B/A setup)
TP17 T-H Loop CH_B OUTPUT for small signal loop gain measurements (B/A setup)
TP18 T-H Loop GND GND reference
TP19 T-H Loop GND VIN- measurement point
TP20 T-H Loop GND GND reference for U1 PVIN for efficiency measurement
TP21 T-H Loop GND GND reference for VOUT for efficiency measurement
TP22 T-H Loop Remote SNS+ OUTPUT remote sense + voltage point
TP23 T-H Loop PVIN_EFF PVIN pin voltage of U1 measurement point for efficiency, reference to TP20
TP24 T-H Loop VOUT_EFF VOUT measurement point for efficiency, reference to TP21
TP25 T-H Loop Remote SNS- OUTPUT remote sense - voltage point
TP26 T-H Loop GND VOUT - measurement point
TP27 T-H Loop VOUT VOUT + measurement point
TP28 T-H Loop VOUT_FILT VOUT_FILT measurement point when using second stage filter

Table 4-2 lists the EVM jumpers.

Table 4-2 Jumpers
Jumper Type Name Description
JP1 Header, 100 mil, 2 × 1 Micro_USB-PVIN Short to connect PVIN to Micro USB connector
JP2 Header, 100 mil, 2 × 1 PMBus3.3V-AVIN Short to connect USB-to-GPIO 3.3V to AVIN
JP3 Header, 100 mil, 3 × 1 AVIN Select AVIN input source selections
JP4 Header, 100 mil, 3 × 2 EN Select EN/UVLO pin selections

Table 4-3 lists the options for the EN/UVLO pin selection.

Table 4-3 JP4 Selections
Shunt Position Selection
pin 1 to 2 shorted PMBus adaptor control signal
pin 3 to 4 shorted Resistor divider to PVIN
pin 5 to 6 shorted EN/UVLO short to ground

Table 4-4 lists the options for the AVIN selection.

Table 4-4 JP3 Selections
Shunt Position Selection
pin 1 to 2 shorted AVIN pin connected to AVIN input through 10-Ω resistor. Use this selection when testing with a split rail input.
pin 2 to 3 shorted AVIN pin connected to PVIN through 10-Ω resistor

Table 4-5 lists the EVM connector functions.

Table 4-5 Connector Functions
Connector Type Name Description
J1 Micro USB Micro USB Micro USB connector to power EVM from a 5 V USB source
J2 Header, 100 mil, 5 × 2 PMBus connector PMBus socket for TI FUSION adaptor
T1 Terminal block, 2 × 1 Ext_AVIN External AVIN connector
T2 Terminal block, 2 × 1 PVIN VIN+ connector
T3 Terminal block, 2 × 1 GND VIN– connector
T4 Terminal block, 2 × 1 GND VOUT_FILT- connector
T5 Terminal block, 2 × 1 VOUT_FILT VOUT_FILT+ connector
T6 Terminal block, 2 × 1 VOUT VOUT+ connector
T7 Terminal block, 2 × 1 GND VOUT– connector