SLUUCF8 March   2021 TPS53676

 

  1.   Trademarks
  2. 1 Introduction
  3. 2 Features
  4. 3 Applications
  5. 4 System Description
    1. 4.1 Phase configuration selection
    2. 4.2 Jumper details
    3. 4.3 On-board load transient
  6. 5 Test Equipment
  7. 6 Test Procedure
    1. 6.1 Start-up Test
    2. 6.2 Shut down Test
    3. 6.3 Steady-state Test
    4. 6.4 Load Transient Test
    5. 6.5 Efficiency Plot
    6. 6.6 Bode plot
  8. 7 Fusion GUI
  9. 8 Evaluation Module (EVM) Hardware
  10. 9 Schematic and Bill of Materials
  11. 10Read This First
    1. 10.1 About This Manual
    2. 10.2 Glossary
    3. 10.3 Related Documentation
    4. 10.4 Support Resources

5 Test Equipment

Table 5-1 Required Test Equipment
Voltage sourcesOnly one DC input voltage source is needed (VIN). Choose a VIN input voltage source with a range between 0 V and 14 V and a variable DC source capable of supplying 40 A (dc). Connect VIN to terminals J6 and J7 as shown in Figure 5-1. For greater control during testing, remove jumpers from J2 and J4 to bypass the onboard 5-V power supply. Limit this external supply to 1 A (dc).
MultimetersRecommended to use two separate multimeters, one meter to measure VIN and the other to measure VOUT.
Output LoadAn electronic load is recommended for the test setup shown in Figure 5-1. To observe the Rail A at full load, ensure that the electronic load is capable of sinking 250 A at 0.88-V (Rail B, 50 A at 0.8 V)
OscilloscopeUse an oscilloscope to measure output noise and ripple. Use a coaxial cable to measure output ripple across J15 (VOUTA) and J16 (VOUTB)
USB-to-GPIO Interface AdapterA communications adapter is required between the EVM and the host computer. This EVM is designed to use the Texas Instruments USB-to-GPIO adapter connected to J12. To purchase this adapter, visit the TI USB-to_GPIO tool page
Fan During prolonged operation at high load (More than 300 A), it is necessary to provide forced air cooling with a small fan aimed at the EVM. Maintain the temperature of the devices on the EVM under115°C
GUID-4D0AB3EC-D48B-4B4E-8EE9-66F30AD021CA-low.jpgFigure 5-1 EVM Test Setup Showing the Power Supply, Load, and Oscilloscope Connections
Table 5-2 Recommended Wire Size
VOLTAGE (V)CONNECTRECOMMENDED WIRE SIZEMAXIMUM TOTAL WIRE LENGTH (FEET)
RETURNINPUTOUTPUT
12VIN to T1, GND to T22 × AWG #822n/a
5 (if J2 open)5VIN to J12 × AWG #1822n/a
0.88(RAILA)Load+ to T3, T4, and T5, Load- to T7, T8, and T96 × AWG #43n/a3
1(RAILB)Load+ to T10, Load- to T9 and T122 × AWG #81n/a1