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

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 TPS546A24AEVM-1PH Electrical Performance Specifications
Parameter Test Conditions MIN TYP MAX Unit
Input Characteristics
Input voltage range, VIN 5 12 18 V
Full load input current IOUT = 10 A 1.13 A
Full load input current VIN = 5 V, IOUT = 10 A 2.6 A
No load input current IOUT = 0 A, switching enabled 65 mA
Enable switching threshold Set by default resistor divider, JP4 pins 3 and 4 shorted 4.7 V
Disable switching threshold Set by default resistor divider, JP4 pins 3 and 4 shorted 4.22 V
Output Characteristics
Output voltage, VOUT 1.2 V
Output load current, IOUT 0 10 A
Output voltage regulation Line Regulation: VIN = 5 V to 18 V 0.1%
Load Regulation: IOUT = 0 A to 10 A 0.1%
Output voltage ripple IOUT = 10 A 7 mVpp
Output voltage undershoot IOUT = 2.5-A to 7.5-A step at 10 A/µs 90 mV
Output voltage overshoot IOUT = 7.5-A to 2.5-A step at 10 A/µs 90 mV
Output overcurrent fault threshold Phase current limit programmed by MSEL2 14 A
Systems Characteristics
Switching frequency Programmed by MSEL1 650 kHz
Full load efficiency, VOUT(1) IOUT = 10 A 89.2%
Operating case temperature IOUT = 10 A, 10 minute soak 37 °C
Loop bandwidth IOUT = 10 A 37 kHz
Phase margin 61 °
PMBus Interface and Pin-Strapping
PMBus address Programmed by NVM and ADRSEL 36 Decimal
Voltage reference Default setting of VOUT_COMMAND programmed by VSEL 1.2 V
Soft-start time (TON_RISE) Default setting of TON_RISE programmed by MSEL2 3 ms
(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.