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

6.5 Efficiency Plot

RAILA is configured for 6-phases and refer to Table 4-2 for jumper setting (J10, J11, J12, J13)

  1. Make sure all default jumpers (J1 to J9) settings as shown in Table 4-3
  2. Connect three multimeters to measure input voltage, Input current, output voltage.
  3. Measure input voltage near power stage VIN pin capacitor (C96)
  4. Input current can be measured as voltage between TP14 and TP15 using RSENSE (0.5 mΩ)
  5. Measure output voltage on one of the top ceramic capacitor close to center phase (C221).
  6. Measure Output current from electronic load display.

  7. Calculate efficiency from these 4 parameters ((Vout*Iout)/(Vin*Iin)).

GUID-20210315-CA0I-6RQJ-7CHJ-RPCVBWLRQLHC-low.gif
VIN = 12 VVOUT = 880 mV
LOUT = 150 nHDPS disabled
fSW = 500 kHzRAILA, 6+1
Figure 6-13 Converter Efficiency and Power Loss Plot