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

6.2 Shut down Test

Use the following procedure for the shutdown test:

RAILA:

  1. Set the load current to 50 A.

  2. Make sure all default jumpers(J1-J9) settings as shown in Table 4-3 .

  3. Connect probes Enable (TP11), VOUTA (J15, BNC cable), PWM1 (TP31), and VOUT_A_RDY (TP22).

  4. Set up the time / div on the oscilloscope to: 500 μs/div.

  5. Set the trigger to channel 1 ‘Enable_A’ on the falling edge at about 1 V.

  6. Turn on the power supply (with the voltage set to 12 V and the current limit set to 10 A).

  7. Slide the enable switch ‘S1’ to the ON position and measure output voltage as 0.88V.

  8. Turn-off the switch "S1" to OFF position.

GUID-20210305-CA0I-RST8-NN93-BCTRQ2CPCTVZ-low.jpgFigure 6-3 VOUTA Enable OFF, Immediate-off
GUID-20210305-CA0I-PQK9-KXDJ-C2SCTQL9MCFV-low.jpgFigure 6-4 VOUTA Enable OFF Soft-off with TOFF delay=1ms

RAILB:

  1. Set the load current to 10 A.

  2. Make sure all default jumpers (J1-J9) settings as shown in Table 4-3.

  3. Connect probes Enable_B (TP12), VOUTB (J16, BNC cable), BPWM1 (TP55), and VOUT_B_RDY (TP23).

  4. Set up the time / div on the oscilloscope to: 500 μs/div.

  5. Set the trigger to channel 1 ‘Enable_B’ on the falling edge at about 0.8V.

  6. Turn on the power supply (with the voltage set to 12 V and the current limit set to 5 A).

  7. Slide the enable switch ‘S2’ to the ON position and measure output voltage as 0.8V.

  8. Turn-off the switch "S2" to OFF position.

GUID-20210304-CA0I-P01C-PWK5-TK0H0ZQ6XGV6-low.jpgFigure 6-5 VOUTB Enable OFF, Immediate-off
GUID-20210304-CA0I-BR1D-VQSC-W8NZFKMJLMS0-low.jpgFigure 6-6 VOUTB Enable OFF Soft-off with TOFF delay=1ms