SLUUC48A February   2020  – February 2022 TPS546B24A

 

  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 Single Phase Operation
    6. 4.6 Evaluating Split Rail Input
    7. 4.7 Configuring EVM to Overdrive VDD5
  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 TP22 and TP25)
    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 Current Sharing Between Two Phases
    11. 7.11 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_P1 T-H Loop PVIN_P1 PVIN pin voltage of U1_P1 device measurement point
TP1_P2 T-H Loop PVIN_P2 PVIN pin voltage of U1_P2 device measurement point
TP2_P1 T-H Loop SW_P1 Switching node of output rail phase 1 measurement point, reference to TP4_P1
TP2_P2 T-H Loop SW_P2 Switching node of output rail phase 2 measurement point, reference to TP4_P2
TP3_P1 T-H Loop GND_P1 GND pin voltage of U1_P1 device measurement point
TP3_P2 T-H Loop GND_P2 GND pin voltage of U1_P2 device measurement point
TP4_P1 T-H Loop GND_P1 GND reference for switch node measurement of U1_P1
TP4_P2 T-H Loop GND_P2 GND reference for switch node measurement of U1_P2
TP5_P1 T-H Loop PG_S_P1 PGOOD signal of phase 1
TP5_P2 T-H Loop PG_S_P2 PGOOD signal of phase 2
TP6 T-H Loop AUX_5V External 5-V measurement point for VDD5
TP7 T-H Loop DATA DATA signal on J2 header
TP8 T-H Loop SMBALRT SMBALERT signal on J2 header
TP9 T-H Loop CNTL CNTL signal on J2 header
TP10 T-H Loop CLK CLK signal on J2 header
TP11 T-H Loop GND GND reference
TP12 T-H Loop PVIN VIN + measurement point
TP13 T-H Loop VOUT_P1 U1_P1 output voltage measurement point for efficiency, reference to TP16
TP14 T-H Loop Remote SNS+ OUTPUT remote sense + voltage point
TP15 T-H Loop GND VIN- measurement point
TP16 T-H Loop GND_P1 U1_P1 output voltage referencing GND for efficiency measurement
TP17 T-H Loop CH_A OUTPUT for small signal loop gain measurements (B/A setup)
TP18 T-H Loop CH_B INPUT for small signal loop gain measurements (B/A setup)
TP19 T-H Loop Ext_AVIN AVIN measurement point
TP20 T-H Loop GND GND reference
TP21 T-H Loop VSHARE VSHARE measurement point. Sensitive signal
TP22 T-H Loop VOUT VOUT + measurement point
TP23 T-H Loop GND GND reference
TP24 T-H Loop GND GND reference
TP25 T-H Loop GND VOUT – measurement point
TP26 T-H Loop VOUT_P2 U1_P2 output voltage measurement point for efficiency, reference to TP30
TP27 T-H Loop SYNC Synchronization connection between U1_P1 and U1_P2. External SYNC input
TP28 T-H Loop Remote SNS– OUTPUT remote sense – voltage point
TP29 T-H Loop BC_DAT Data for back-channel communications between stacked devices
TP30 T-H Loop GND_P2 U1_P2 output voltage referencing GND for efficiency measurement
TP31 T-H Loop BC_CLK Clock for back-channel communications between stacked devices
TP32 T-H Loop GND GND reference
TP33 T-H Loop VOSNS_P2 VOSNS measurement point for U1_P2
TP34_P1, TP34_P2 T-H Loop MSEL2_P1, MSEL2_P2 MSEL2 measurement point for U1_P1 and U1_P2
TP35_P1, TP35_P2 T-H Loop VSEL_P1, VSEL_P2 VSEL measurement point for U1_P1 and U1_P2

Table 4-2 lists the EVM jumpers.

Table 4-2 Jumpers
Jumper Type Name Description
JP1_P1, JP1_P2 Header, 100 mil, 2 × 1 EXT_5.1V_P1, EXT_5.1V_P2 Short to connect VDD5 of U1_P1 or U1_P2 to the 5.1 V from U2
JP2_P1, JP2_P2 Header, 100 mil, 3 × 2 CNTL_SEL1, CNTL_SEL2 U1_P1 and U1_P2 EN/UVLO pin selections
JP3 Header, 100 mil, 2 × 1 EN to GND Short to disable the auxiliary 5 V
JP4 Header, 100 mil, 2 × 1 AVIN-PVIN Short to connect to connect AVIN input to PVIN
JP5 Header, 100 mil, 2 × 1 AVIN-LDO Short to connect to connect AVIN input to U2 input
JP6 Header, 100 mil, 2 × 1 PMBus3.3V-AVIN Short to connect USB-to-GPIO 3.3 V to AVIN
JP7_P1, JP7_P2 Header, 100 mil, 3 × 1 AVIN-U1_P1, AVIN-U1_P2 U1_P1 and U1_P2 AVIN input source selections
JP8 Header, 100 mil, 2 × 1 Micro_USB-PVIN Short to connect PVIN to Micro USB connector

Table 4-3 lists the options for the EN/UVLO pin selections on JP2_P1 and JP2_P2.

Table 4-3 JP2_P1 and JP2_P2 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 EN/UVLO pin selections on JP2_P1 and JP2_P2.

Table 4-4 JP7_P1 and JP7_P2 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 Header, 100 mil, 6 × 2 N/A Do not use
J2 Header, 100 mil, 5 × 2 PMBus connector PMBus socket for TI FUSION adaptor
J3 Header, 100 mil, 6 × 2 N/A Do not use
J4 Micro USB Micro USB Micro USB connector to power EVM from a 5 V USB source
T1 Terminal block, 2 × 1 PVIN VIN+ connector
T2 Terminal block, 2 × 1 GND VIN– connector
T3 Terminal 90A Lug VOUT VOUT+ connector
T4 Terminal block, 2 × 1 Ext_AVIN External AVIN connector
T5 Terminal 90A Lug GND VOUT– connector