TIDT422 June   2025

 

  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
    4. 1.4 Test Setup
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Voltage Regulation
    3. 2.3 Efficiency Data
    4. 2.4 Thermal Images
    5. 2.5 EMI
  7. 3Waveforms
    1. 3.1 AC Brown In and Brown Out
    2. 3.2 AC Start Up and Shut Down
    3. 3.3 Voltage Transition
    4. 3.4 Switching
    5. 3.5 Output Voltage Ripple
    6. 3.6 Load Transient
    7. 3.7 Short-Circuit Protection
    8. 3.8 Feedback Loop Open Protection

Description

This reference design is a 45W, low-profile AC/DC USB Power Delivery (PD) charger reference design with integrated flyback controller and gallium nitride (GaN) power switch. This design can achieve less than 10mm height by using a low-profile planar PCB transformer. The flyback converter UCG28826 features VCC self-bias and simplifies the planar transformer PCB winding by eliminating auxiliary winding as well as associated VCC rectifier circuity. The design can meet efficiency standards and regulations such as Department of Energy (DOE) Level VI and Code of Conduct (CoC) Version 5 (V5) Tier 2 standards. The design achieves less than 75mW standby power consumption at 230VAC.