Datasheet

LM3448

SNOSB51C –SEPTEMBER 2011–REVISED MAY 2013

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DESIGN #3: 6W, 120VAC Isolated Flyback LED Driver with Direct Line Injection

SPECIFICATIONS:

• AC Input Voltage: 120VAC nominal (85VAC – 135VAC)

• Flyback Output Voltage: 27.1V

• LED Output Current: 228mA

This TRIAC dimmer compatible design incorporates the following features:

• Direct line-injection for improved power factor performance,

• Standard V

start-up with auxiliary winding bias circuit for improved system efficiency,

• Zener diode derived COFF current source for improved V

ripple rejection,

• Additional TRIAC holding current circuit for improved dimmer performance at low conduction angles,

• Output overvoltage protection (OVP).

NOTE: Refer to LM3448 Application Note, AN-2090 (TI Lit Number SNOA554), for additional information and

BOM regarding this design.

Product Folder Links: LM3448