SLUAB19 May   2025 LM25180-Q1 , LM5155-Q1 , SN6507-Q1 , UCC14240-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Low-Voltage Isolated Bias Power Supply
    2. 1.2 High-Voltage Bias Power Supply
  5. 2Centralized Isolated Bias Power Supply Architecture
  6. 3Semi-Distributed Isolated Bias Power Supply Architecture
  7. 4Bias Power Supply Using DC-DC Converter Module
  8. 5Isolated Bias Power Supply Using Gate Driver to Drive the Transformer
  9. 6Redundancy in the Isolated Bias Power Supply Architecture
  10. 7Summary
  11. 8Terminology

7 Summary

The bias power supply is an important part of a HVLV DCDC converter design. There are several possible bias power supply architectures for HVLV DCDC converter and some commonly-used architectures, are shown in this paper. Based on the chosen architecture, the next step is to choose a topology (flyback, push-pull, LLC resonant, integrated DC/DC module, and so forth) and the associated devices. Design complexity, size, functional safety requirements, and cost play the main role in the decision of which type of architecture, topology and device to use.