Texas Instruments LM3448 Evaluation Board LM3448-EDSNEV/NOPB LM3448-EDSNEV/NOPB Datenbogen
Produktcode
LM3448-EDSNEV/NOPB
SNOSB51C – SEPTEMBER 2011 – REVISED MAY 2013
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
DC
•
LED Output Current: 342mA
This TRIAC dimmer compatible design incorporates the following features:
•
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Passive valley-fill PFC for improved power factor performance,
•
Comprehensive TRIAC holding current coverage,
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Standard V
CC
start-up and bias circuit,
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Constant-off time control with LED voltage drift compensation.
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