Design Idea DI-34 TinySwitch-II 5 W Universal Adapter

Design Highlights

• Simple design: low parts count (23)

• <300 mW no-load without transformer bias winding

• Frequency jittering reduces EMI - meets EN55022 Class B with no Y capacitor: very low primary-to-secondary leakage current

• ±7 output tolerance with simple Zener reference

• High Frequency (132 kHz) operation allows small, low cost EE16 transformer

• Built-in thermal shutdown protection

• ON/OFF digital regulation: No analog control loop to compensate