Datasheet

LM3448

SNOSB51C –SEPTEMBER 2011–REVISED MAY 2013

www.ti.com

APPLICATIONS INFORMATION

DESIGN #1: 7W, 120VAC Non-isolated Buck LED Driver with Valley-Fill PFC

SPECIFICATIONS:

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

• Output Voltage: 21.1V

• LED Output Current: 342mA

This TRIAC dimmer compatible design incorporates the following features:

• Passive valley-fill PFC for improved power factor performance,

• Comprehensive TRIAC holding current coverage,

• Standard V

start-up and bias circuit,

• Constant-off time control with LED voltage drift compensation.

Product Folder Links: LM3448