SLUUCA9A September   2020  – April 2021 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 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

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 TPS546B24AEVM-1PH Electrical Performance Specifications
ParameterTest ConditionsMINTYPMAXUnit
Input Characteristics
Input voltage range, VIN51218V
Full load input currentIOUT = 20 A2.24A
Full load input currentVIN = 5 V, IOUT = 20 A5.3A
No load input currentIOUT = 0 A, switching enabled65mA
Enable switching thresholdSet by default resistor divider, JP4 pins 3 and 4 shorted

4.7

V
Disable switching thresholdSet by default resistor divider, JP4 pins 3 and 4 shorted4.22V
Output Characteristics
Output voltage, VOUT1.2V
Output load current, IOUT020A
Output voltage regulationLine Regulation: VIN = 5 V to 18 V0.1%
Load Regulation: IOUT = 0 A to 20 A0.1%
Output voltage rippleIOUT = 20 A8mVpp
Output voltage undershootIOUT = 5-A to 15-A step at 10 A/µs40mV
Output voltage overshootIOUT = 15-A to 5-A step at 10 A/µs40mV
Output overcurrent fault thresholdPhase current limit setting programmed by MSEL226A
Systems Characteristics
Switching frequencyProgrammed by MSEL1650kHz
Full load efficiency, VOUT(1)IOUT = 20 A89.5%
Operating case temperatureIOUT = 20 A, 10 minute soak52.3°C
Loop bandwidthIOUT = 20 A37kHz
Phase margin75°
PMBus Interface and Pin-Strapping
PMBus addressProgrammed by NVM and ADRSEL36Decimal
Voltage referenceDefault setting of VOUT_COMMAND programmed by VSEL1.2V
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 6-1 to minimize the effect of DC drops caused by onboard copper traces.