SLUUCQ1 March   2023 TPS546D24S

 

  1.   Stacking TPS546D24S Two-Phase Evaluation Module
  2.   Trademarks
  3. 1 Description
    1. 1.1 Before You Begin
    2. 1.2 Typical Applications
    3. 1.3 Features
  4. 2 Electrical Performance Specifications
  5. 3 Schematic
  6. 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
  7. 5 EVM Configuration Using the Fusion GUI
    1. 5.1 Configuration Procedure
  8. 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
  9. 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
  10. 8 EVM Assembly Drawing and PCB Layout
  11. 9 Bill of Materials
  12. 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

2 Electrical Performance Specifications

Table 2-1 lists the electrical performance specifications in room temperature (20 to 25°C). Characteristics are given for an input voltage of VIN = 12 V, unless otherwise specified.

Table 2-1 TPS546D24SEVM-2PH Electrical Performance Specifications
ParameterTest ConditionsMINTYPMAXUnit
Input Characteristics
Input voltage range, VIN51216V
Full load input currentIOUT = 80 A6.4A
Full load input currentVIN = 5 V, IOUT = 80 A15.6A
No load input currentIOUT = 0 A, switching enabled130mA
Enable switching thresholdSet by default resistor divider, JP2_P1 and JP2_P2 pins 3 and 4 shorted5.26V
Disable switching thresholdSet by default resistor divider, JP2_P1 and JP2_P2 pins 3 and 4 shorted4.75V
Output Characteristics
Output voltage, VOUT0.8V
Output load current, IOUT080A
Output voltage regulationLine Regulation: VIN = 5 V to 16 V0.1%
Load Regulation: IOUT = 0 A to 80 A0.1%
Output voltage rippleIOUT = 80 A5mVpp
Output voltage undershootIOUT = 20-A to 60-A step at 1 A/µs70mV
Output voltage overshootIOUT = 60-A to 20-A step at 100 A/µs70mV
Output overcurrent fault thresholdPhase current limit setting of U1_P1 programmed by MSEL252A
Phase current limit setting of U1_P2 programmed by MSEL252A
Systems Characteristics
Switching frequencyProgrammed by MSEL1550kHz
Full load efficiency, VOUT(1)IOUT = 80 A84.8%
Operating case temperatureIOUT = 80 A, 10 minute soak80°C
Loop bandwidthIOUT = 40 A30.3kHz
Phase margin93.5°
PMBus Interface and Pin-Strapping
U1_P1 PMBus addressProgrammed by NVM and ADRSEL36Decimal
U1_P1 Voltage referenceDefault setting of VOUT_COMMAND programmed by VSEL800mV
U1_P1 Soft-start time (TON_RISE)Default setting of TON_RISE programmed by MSEL23ms
(1) The efficiency is measured using the test points listed in Table 6-2 to minimize the effect of DC drops caused by onboard copper traces.