TIDT366 November   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency and Regulation Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Start-Up Sequence
    5. 3.5 Overcurrent Protection (OCP)
    6. 3.6 Short-Circuit Protection

Description

This reference design provides an isolated 12-V, 48-W output power conversion with cascaded flyback topology. The power supply can be powered from the 300-V to 1,000-V DC (direct current) input. This design uses valley switching fly-back controller UCC28730 to achieve less than 70-mW low standby power loss at 1000-V input voltage to extend the battery lifetime.