SLUAAP4 October   2023 LM2005 , LM2101 , LM2103 , LM2104 , LM2105 , LM5108 , UCC27531 , UCC27710 , UCC44273

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Gate Driver IC Configurations
  6. 3Key Voltage and Current Specifications
    1. 3.1 Voltage Ratings
    2. 3.2 Peak Current
  7. 4Robustness Features
    1. 4.1 Undervoltage Lockout
    2. 4.2 Negative Voltage Handling
    3. 4.3 Cross-Conduction Protection
  8. 5Board Space, Thermal Performance, and Other Considerations
  9. 6Summary
  10. 7References

4.1 Undervoltage Lockout

UVLO is a protection feature that pulls the driver output low until the supply voltage reaches a set threshold. Without a protection like this, excessive power dissipation can put the power switch at risk for damage. To read more, see Low-Side Gate Drivers With UVLO Versus BJT Totem-Pole. The UVLO threshold is related to the lower end of the VDD specification. To pick the most appropriate driver, choose the UVLO threshold based on the power switch. Si MOSFETs typically require 4-V, 5-V, or 8-V UVLO. IGBTs typically require 8-V or 12-V UVLO. SiC MOSFETs typically require 12-V, 15-V, or 17-V UVLO.