SLUUBG8C November   2018  – October 2021 UCC20520 , UCC21320-Q1 , UCC21520 , UCC21520-Q1 , UCC21521 , UCC21530

 

  1.   Trademarks
  2. 1 Introduction
  3. 2 Description
  4. 3 Features
    1. 3.1 I/O Description
    2. 3.2 Jumpers (Shunt) Setting
  5. 4 Electrical Specifications
  6. 5 Test Summary
    1. 5.1 Definitions
    2. 5.2 Equipment
      1. 5.2.1 Power Supplies
      2. 5.2.2 Function Generators
    3. 5.3 Equipment Setup
      1. 5.3.1 DC Power Supply Settings
      2. 5.3.2 Digital Multi-Meter Settings
      3. 5.3.3 Two-Channel Function Generator Settings
      4. 5.3.4 Oscilloscope Setting
      5. 5.3.5 Jumper (Shunt) Settings
      6. 5.3.6 Bench Setup Diagram
  7. 6 Power-Up and Power-Down Procedure
    1. 6.1 Power Up
    2. 6.2 Power Down
  8. 7 Test Waveforms (CL=0pF) With Different DT Configurations
    1. 7.1 DT Connected to VCCI (J-DT Option B in Table 1-1 )
    2. 7.2 DT Pin Floating or Left Open (J-DT Option A in Table 1-1 )
    3. 7.3 DT Pin Connected to RDT (J-DT Option C in Table 1-1 )
  9. 8 Schematic
  10. 9 Layout Diagrams
  11. 10List of Materials
  12. 11Revision History

6.1 Power Up

  1. Make sure that Section 5.3.6 is implemented for setting up all the equipment before starting the power-up sequence. Figure 6-1 can be used as a reference.
  2. Enable supply #1;
  3. Enable supply #2 and #3, the quiescent current on DMM1 and DMM2 ranges from 1 mA to approximately 3 mA if everything is set correctly;
  4. Enable the function generator, two-channel outputs: channel-A and channel-B;
  5. There will be:
    1. Stable pulse output on the channel-A and channel-B in the oscilloscope (refer to Figure 6-1);
    2. Scope frequency measurement is the same with function generator output;
    3. DMM #1 and #2 read measurement results should be around 10 mA, ±2 mA under no load conditions. For more information about operating current, refer to the UCC21520 data sheet.
GUID-D08227B6-6B23-4F27-9EB5-930D46B72810-low.gifFigure 6-1 Example Input and Output Waveforms (Channels 3 and 4 are PWM Inputs, Channels 1 and 2 are Outputs)