SLUA887A August   2018  – September 2023 UCC27201A , UCC27710 , UCC27712 , UCC27714

 

  1.   1
  2.   Bootstrap Circuitry Selection for Half-Bridge Configurations
  3.   Trademarks
  4. 1Introduction
  5. 2Basic Operation of Bootstrap Circuit
  6. 3Bootstrap Components Selection
    1. 3.1 Bootstrap Capacitor
    2.     8
    3. 3.2 VDD Bypass Capacitor
    4. 3.3 External Bootstrap Diode
    5.     11
    6. 3.4 Bootstrap Resistor
    7.     13
  7. 4Layout Considerations for Bootstrap Components
  8. 5Summary
  9. 6References
  10. 7Revision History

Figure 3-3 shows the effects of the losses on the HB-HS pin which can trigger the switch node and potentially damage the driver.

GUID-976D87E2-3049-4BD2-B1B2-D58187AC1C5B-low.gif Figure 3-3 HB_HS Ringing Effects on Switch Node