High Efficiency Constant Current Buck Converter for LED Lighting

by no author specified, Power Integrations, Vendor website, Feb 01 2008

Focus:
Based on the LNK306PN LinkSwitch-TN chip, this design implements a 120-Vac input, 70-V 130-mA output constant-current power supply for driving LEDs. This nonisolated supply uses a buck topology to achieve greater than 90% efficiency over its operating range.

What you’ll learn:

• How to build a 9.1-W 70-V output, 120-VAC input, nonisolated power supply for driving LEDs

Notes:
Design Idea DI-172.

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