SLUUBH3A November   2016  – February 2022 TPS546C20A

 

  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 Recommended Test Setup
    4. 4.4 List of Test Points, Jumpers and Connectors
  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 Control Loop Gain and Phase Measurement Procedure
    3. 6.3 Efficiency Measurement
  8. 7 Performance Data and Typical Characteristic Curves
    1. 7.1  Efficiency
    2. 7.2  Load Regulation
    3. 7.3  Line Regulation
    4. 7.4  Transient Response
    5. 7.5  Output Ripple
    6. 7.6  Control On
    7. 7.7  Control Off
    8. 7.8  Current Sharing Between Two Phases
    9. 7.9  Control Loop Bode Plot
    10. 7.10 Thermal Image
  9. 8 EVM Assembly Drawing and PCB Layout
  10. 9 Bill of Materials
  11. 10Screenshots
    1. 10.1 Fusion GUI Screenshots
  12. 11Revision History

2 Electrical Performance Specifications

Table 2-1 lists the electrical performance specifications under room temperature 25°C.

Table 2-1 TPS546C20AEVM2-746 Electrical Performance Specifications
Parameter Test Conditions MIN TYP MAX Unit
Input Characteristics
Voltage range VIN 5 12 18 V
Maximum input current VIN = 12 V, IO = 70 A 6.5 A
No load input current VIN = 12 V, IO = 0 A 120 mA
Output Characteristics
Output voltage, VOUT 0.9 V
Output load current, IOUT(1) 0 70 A
Output voltage regulation Line regulation: input voltage = 5 V to 18 V 1%
Load regulation: output current = 0 A to 70 A 1%
Output voltage ripple, VOUT VIN = 12 V, IOUT = 70 A 10 mVpp
Output overcurrent protection threshold Load current IOUT1, default setting of U1 42 A
Load current IOUT2, default setting of U2 42 A
Systems Characteristics
Switching frequency VIN = 12 V 500 kHz
Full load efficiency, VOUT(2) VIN = 12 V, IOUT = 70 A 83%
Operating temperature Tambient 25 °C
PMBUS Interface and Pin-Strapping
U1 PMBUS address Fixed 36 Decimal
U2 PMBus address Fixed 37
U1 voltage reference Programmed by VSEL resistor R35 900 mV
U2 voltage reference Programmed by VSEL resistor R36 950
U1 soft-start time (TON_RISE) Programmed by SS resistor R33 5 ms
U2 soft-start time (TON_RISE) Programmed by SS resistor R37 7
(1) The output current IOUT can be up to 80 A, if the output overcurrent limit (IOUT_OC_FAULT_LIMIT) is set to 45 A.
(2) The efficiency is measured based on Figure 4-1 and test setups, which includes power loss caused by on board copper traces.