Power Integrations - Dual Output 17.5 W Power Supply


This engineering report describing a 1.25 A, 12 V and 0.5 A, 5 V dual
output embedded power supply utilizing the INN2904K, with a 900 V rated MOSFET,
from the InnoSwitch-EP family of ICs.
This design shows the high power density and efficiency that is possible due to the high
level of integration while still providing exceptional performance.
The document contains the power supply specification, schematic, bill of materials,
transformer documentation, printed circuit layout, and performance data.

Summary and Features
• InnoSwitch-EP – industry first AC/DC ICs with isolated, safety rated integrated feedback
• 900 V rated MOSFET
• Built in synchronous rectification for higher efficiency
• All the benefits of secondary side control with the simplicity of primary side regulation
• Insensitive to transformer variation
• Extremely fast transient response independent of load timing
• Meets output cross regulation requirements without linear regulators
• Primary sensed output overvoltage protection (OVP) eliminates optocoupler for fault
• Accurate thermal protection with hysteretic shutdown
• Input voltage monitor with accurate brown-in/brown-out and overvoltage protection

Click here for Reference Design Report