# AC/DC

## Design Method of PWM AC/DC Flyback Converters

### Want are Isolated Flyhback Convertors?

2015/12/17

Before proceeding with the design process, we need to confirm the fundamentals of the isolated flyback converter.

As shown in the following outline, we will discuss switching AC/DC conversions, the characteristics of a flyback converter, its operation and snubber, and continuous and discontinuous modes. A solid understanding of these concepts is a prerequisite for the design process.

**<Design Method of PWM Type AC/DC Flyback Converters>**

- 1. Isolated Flyback Converter Basics
- Switching AC/DC Conversion
- Flyback converter: Characteristics
- Flyback converter: Operation and Snubber
- Continuous & Discontinuous Modes

- 2. Design Procedure
- 3. Determining Power Supply Specifications
- 4. Choosing an IC for Design
- 5. Designing Isolated Flyback Converter Circuits
- Transformer Design (Calculating numerical values)
- Transformer Design (Structural design) - 1
- Transformer Design (Structural design) - 2
- Selecting Critical Components – MOSFET related - 1
- Selecting Critical Components – MOSFET related - 2
- Selecting Critical Components – CIN and Snubber
- Selecting Critical Components – Output Rectifier and Cout
- Selecting Critical Components – IC VCC related
- Selecting Critical Components – Setting up an IC, and Miscellaneous
- Addressing EM and Output Noise
- 6. Example Board Layout
- 7. Summary