SLVUCI4B february   2023  – may 2023 TPS7H5001-SP

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2System Design Theory
    1. 2.1  Switching Frequency
    2. 2.2  Leading Edge Blanking
    3. 2.3  Dead Time
    4. 2.4  Enable and UVLO
    5. 2.5  Output Voltage Programing
    6. 2.6  Soft Start
    7. 2.7  Sensing Circuit
    8. 2.8  FAULT Mode
    9. 2.9  HICCUP Mode
    10. 2.10 Slope Compensation
    11. 2.11 Output Capacitance
    12. 2.12 Compensation
  6. 3Test Results
  7. 4Bill of Materials
  8. 5Schematics
  9. 6PCB Layouts
  10. 7References
  11. 8Revision History

2.9 HICCUP Mode

For the design, the value of the hiccup capacitor used is 100 nF. Based on this value, the delay and hiccup times of the converter after an overcurrent are detected can be calculated using Equation 9 and Equation 10, respectively.

Equation 9. t d e l a y =   C H I C C   x   0.6   V   80   μ A =     100   n F   x   0.6   V     80   μ A =     75   μ s
Equation 10. t H I C C =   C H I C C   x   ( 1   V - 0.3   V )   1   μ A =   100   n F   x   ( 1   V - 0.3   V )   1   u A =   70   m s