principle circuit diagram of switch mode power supplies

Data sheet as PDF download.

principle circuit diagram

advantages

disadvantages

• simple structure and low cost
• only one inductive component
• several secondary voltages
• are good adjustable

• large transformer with air gap necessary
• high eddy current losses at the area of the air gap
• high efforts for radio interference supression

• simple trigger electronics

• two inductive components necessary
• large choke at secondary
• several secondary voltages only with high efforts adjustable
• efforts for radio interference supression

• only a small choke necessary
• less efforts for radio interference supression

• two inductive components necessary
• complex windings

Source: Prof. Kilgenstein