Low profile offline switch mode power supply

Exhibitor: Weng Hoe Wong Joel

Supervisor: Richard Cocks

Research Group: Embedded Systems

Industry Sector: Energy and Utilities

The aim of this project is to produce a low cost Switch Mode Power Supply (SMPS) to power low energy embedded products. The module should be able to handle a wide range of input voltages and produce a steady output at 3 or 5 volts. In addition, the unit must produce power from 500mW to 2.5W with a maximum component height of 12.5mm.

With the completion of this project, I hope that the switch mode power supply can provide highly efficient power conversion in several countries. As the module is design to handle a universal input voltage range, this goal can be achieve.

The objectives of this project have been met as the final product has fulfilled all the specified parameters. However, if I were given a chance to re-design the power supply, I would use a masked PCB so that I can place the components closer to each other. That way, the size of the power supply will be further reduce. In addition, I would like to have multiple voltage outputs (by introducing more secondary windings) to improve the product’s functionality.

Thesis Document (PDF)

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