RDR-131 Datasheet, PDF (1/24 Pages) Power Integrations, Inc. – Reference Design Report for 3 W Non- Isolated Constant Current LED Driver Using LNK306DN

Title
Reference Design Report for 3 W Non-
Isolated Constant Current LED Driver
Using LNK306DN
Specification 85–265 VAC Input, 10 V, 300 mA Output
Application LED Lighting / Bulb Retrofit
Author
Power Integrations Applications Department
Document
Number
RDR-131
Date
March 7, 2007
Revision
1.1
Summary and Features
• Extremely small form factor, fits within GU10 lamp base
• Operates over the universal input voltage range (85 – 265 VAC)
• Meets EN55022 B conducted EMI requirements
• Drives LEDs in constant current (CC) mode
• Built-in, output overvoltage protection when unloaded
• Allows supply to be tested without the load connected
• Low parts count, low-cost solution: only 25 components
• Non-isolated buck converter configuration allows use of off-the-shelf inductors
(does not require a custom transformer)
The products and applications illustrated herein (including circuits external to the products and transformer
construction) may be covered by one or more U.S. and foreign patents or potentially by pending U.S. and foreign
patent applications assigned to Power Integrations. A complete list of Power Integrations’ patents may be found at
www.powerint.com.
Power Integrations
5245 Hellyer Avenue, San Jose, CA 95138 USA.
Tel: [phone] Fax: [phone]
www.powerint.com