SLVUC07A December   2020  – May 2021 TPS543320

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Background
    2. 1.2 Before You Begin
    3. 1.3 Performance Characteristics Summary
  3. 2Configurations and Modifications
    1. 2.1 Output Voltage
    2. 2.2 Switching Frequency (FSEL Pin)
    3. 2.3 Current Limit, Soft-Start Time, and Internal Compensation (MODE Pin)
    4. 2.4 Adjustable UVLO
  4. 3Test Setup and Results
    1. 3.1  Input/Output Connections
    2. 3.2  Efficiency
    3. 3.3  Output Voltage Regulation
    4. 3.4  Load Transient and Loop Response
    5. 3.5  Output Voltage Ripple
    6. 3.6  Input Voltage Ripple
    7. 3.7  Synchronizing to a Clock
    8. 3.8  Start-up and Shutdown with EN
    9. 3.9  Start-up and Shutdown with VIN
    10. 3.10 Hiccup Current Limit
    11. 3.11 Overvoltage Protection
    12. 3.12 Thermal Performance
  5. 4Board Layout
    1. 4.1 Layout
  6. 5Schematic and Bill of Materials
    1. 5.1 Schematic
    2. 5.2 Bill of Materials
  7. 6Revision History

3.10 Hiccup Current Limit

Figure 3-30 through Figure 3-31 show the TPS543320 hiccup current limit feature. These waveforms are measured using U2. Figure 3-30 shows the response to an overload in the current limit settings, while Figure 3-31 shows the response to a hard short on the output.

Figure 3-31 shows the TPS543320 entering hiccup with an overload on the output. The TPS543320 tries to restart after the Hiccup wait time period but the overload was still present on the output. In the next restart attempt, the overload has been removed so the TPS543320 starts up normally.

GUID-20201130-CA0I-FT4S-CH06-B4WPPHKZJXVV-low.pngFigure 3-30 U2 Output Overcurrent Protection – Overload
GUID-20201130-CA0I-NRBB-GJW7-DSHS7W5HCB5B-low.pngFigure 3-31 U2 OCP Hiccup and Recover