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

5 EVM Configuration Using the Fusion GUI

The TPS546C20A on this EVM leave the factory pre-configured. See Table 5-1 for a short list of key factory configuration parameters as obtained from the configuration file.

Table 5-1 Key Factory Configuration Parameters
ADDRESS HEX ADDRESS DEC PART ID DESIGNATOR
0x44 36 TPS546C20A U1
0x44 37 TPS546C20A U2
GENERAL
CMD Code CMD
CODE
HEX		 ENCODED HEX DECODED COMMENTS
VIN_OFF 0x36 0xF010 4.0 V Turn OFF voltage
VIN_ON 0x35 0xF012 4.5 V Turn ON voltage
IOUT_CAL_OFFSET 0x39 0xE000 0.0000 A Current offset for PMBUS readout
IOUT_OC_FAULT_LIMIT 0x46 0xF854 42 A OC fault level
IOUT_OC_FAULT_RESPONSE 0x47 0xFF Restart Response to OC fault
IOUT_OC_WARN_LIMIT 0x4A 0xF84A 37 A OC warning level
VOUT_COMMAND 0x21 0x0133 0.6 V Reference voltage
VOUT_MIN 0x2B 00B3h 0.35V Minimum reference voltage
VOUT_MAX 0x24 0x034D 1.65 V maximum reference voltage
VOUT_TRANSITION_RATE 0x27 0xD03C 1 mV/us Vout transition rate
VOUT_SCALE_LOOP 0x29 0xF004 1 Output sense scaling ratio for main control loop
PCT_OV_UV_WRN_FLT_LIMITS 0xD6 0x00 UV FAULT 83% Output OV/UV settings, reference to nominal reference voltage
UV WARN 88%
OV WARN 112%
OV FAULT 117%
VOUT_OV_FAULT_RESPONSE 0x41 0xBF Restart Output overvoltage fault response
VOUT_UV_FAULT_RESPONSE 0x45 0xBF Restart Output undervoltage fault response
ON_OFF_CONFIG 0x02 0x16 CNTL only, Active High. Control signal and operation command
OPERATION 0x01 0x00 Operation is not used to enable regulation Can be used to control device On/Off
OT_FAULT_LIMIT 0x4F 0x0091 145°C OT fault level
OT_WARN_LIMIT 0x51 0x0078 120°C OT warn level
OT_FAULT_RESPONSE 0x50 0x3F Ignore Response to over temperature faults
TON_DELAY 0x60 0x0000 0 ms Turn-on delay
TON_RISE 0x61 0x0003 3 ms Soft-start time
TON_MAX_FAULT_LIMIT 0x62 0x0000 Disabled Upper limit for Vout reaching regulation
TOFF_DELAY 0x64 0x0000 0 ms Turn-off delay
TOFF_FALL 0x65 0x0000 0 ms Soft-stop fall time

If it is desired to configure the EVM to settings other than the factory settings shown above, the TI Fusion Digital Power Designer software can be used for reconfiguration. It is necessary to have input voltage applied to the EVM prior to launching the software so that the TPS546C20A can respond to the GUI and the GUI can recognize the device. The default configuration for the EVM is to start converting at an input voltage of 4.5 V, therefore, to avoid any converter activity during configuration, an input voltage less than 4.5 V should be applied. An input voltage of 4 V is recommended.