SLUAAS4 January   2024 LM5155-Q1 , LM51551-Q1 , LM5156-Q1 , LM51561-Q1 , LM51561H-Q1 , LM5156H-Q1 , LM5157-Q1 , LM51571-Q1 , LM5158-Q1 , LM51581-Q1 , UCC28700-Q1 , UCC28730-Q1 , UCC28740-Q1 , UCC28781-Q1 , UCC28C50-Q1 , UCC28C51-Q1 , UCC28C52-Q1 , UCC28C53-Q1 , UCC28C54-Q1 , UCC28C55-Q1 , UCC28C56H-Q1 , UCC28C56L-Q1 , UCC28C57H-Q1 , UCC28C57L-Q1 , UCC28C58-Q1 , UCC28C59-Q1

 

  1.   1
  2.   Abstract
  3. 1Introduction
    1. 1.1 Low-Voltage Isolated Bias Power Supply
    2. 1.2 High-Voltage Isolated Bias Power Supply
  4. 2Pre-Regulator Requirement
    1. 2.1 Pre-Regulator at Low-Voltage Battery
      1. 2.1.1 Single Pre-Regulators Architecture
      2. 2.1.2 Multiple Pre-Regulators Architecture
    2. 2.2 Pre-Regulator From High-Voltage Battery
  5. 3Fully-Distributed Architecture
  6. 4Semi-Distributed Architecture
  7. 5Centralized Architecture
  8. 6Redundancy in Isolated Bias Power Supply Architectures
    1. 6.1 No Redundancy
    2. 6.2 Redundancy to all Devices
    3. 6.3 Redundancy to Low Side Only
    4. 6.4 Redundancy to High Side Only
  9. 7Summary
  10. 8Terminology

6.1 No Redundancy

Figure 6-1 shows the architecture where both LV and HV batteries are used for providing the power to isolated bias supply devices. The low-side gate drivers are supplied from the HV and the high-side gate drivers from the LV battery. A vice-versa combination is also possible. In both cases there is no redundancy for the gate drivers, but there is a lower risk that both high-side and low-side gate drivers lose the supply at the same time. In case of losing connection or supply from one battery, either low-side or high-side gate drivers can still be powered.

GUID-20231228-SS0I-HDKW-FK6D-S8W8PRG65NDF-low.svgFigure 6-1 No Redundancy While Using LV and HV Batteries