Description
The RD2 reference design board is an example of a very low cost production worthy power supply design using the TOPSwitch family of Three-terminal Off-line Switchers from Power Integrations. It is intended to help TOPSwitch users to quickly develop their products by providing a basic design that can be easily modified to fit a particular application. In most cases, a minor change to the transformer for a different output voltage or voltages is all that is needed. A complete set of performance curves, the parts list, the board layout and details on transformer design are provided to speed up the TOPSwitch based switcher design.

Product Highlights
Low Cost Production Worthy Reference Design
• Only 21 components!
• Single sided board
• Low cost thru-hole components
• Fully assembled and tested
• Easy to evaluate and modify
• Extensive performance data
• Up to 77% efficiency
• Light weight - no heat sink required for TOPSwitch

Fully Protected by TOPSwitch
• Primary safety current limit
• Output short circuit protection
• Thermal shutdown protects entire power supply

Designed for World Wide Operation
• Designed for IEC/UL safety requirements
• Meets VDE Class B EMI specifications

Typical Applications
• Replacement for low power linear adapters
• Auxiliary power supply for appliance, motor control, utility meters, smart building, UPS, etc.