RDK-506

Reference design kit for a 1.44W non-isolated buck converter using LinkSwitch™ -TN2 LNK3204D/P/G. Typical application includes small appliance. The board provides a non-isolated 12V, 120mA continuous output. In metering applications this is used to supply the control circuits and micro controller. LinkSwitch-TN2 integrates a 725V MOSFET and control circuitry into a single low cost IC. Regulation is achieved using a low cost resistor divider feedback network. The switching frequency jitter feature of the LinkSwitch-TN2 family and the 66KHz switching frequency of operation helps reduce EMI.

• Input: 85VAC to 265VAC, output: 12V, 120mA
• Highly integrated solution
• Lowest possible component count
• No optocoupler or zener diode required for regulation
• Thermal overload protection with automatic recovery
• <lt/>30mW no-load consumption, <gt/>75% efficiency at full load
• <lt/>±3% load regulation

Notes

All testing should be performed using an isolation transformer to provide the AC input to the prototype board.