Texas Instruments LM3448 Evaluation Board LM3448-EDSNEV/NOPB LM3448-EDSNEV/NOPB Scheda Tecnica
Codici prodotto
LM3448-EDSNEV/NOPB
TRIAC
+
+
BLDR
ASNS
ISNS
DIM
COFF
GND
VCC
FLTR1
GND
FLTR2
LM3448
SW
SW
SW
SW
BLDR
VCC
LED
LOAD
AC
INPUT
EMI
FILTER
COFF
SNOSB51C – SEPTEMBER 2011 – REVISED MAY 2013
Phase Dimmable Offline LED Driver with Integrated FET
Check for Samples:
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FEATURES
DESCRIPTION
The LM3448 is an adaptive constant off-time AC/DC
2
•
Input phase angle dim decoder circuit for LED
buck (step-down) constant current LED regulator
dimming
designed to be compatible with TRIAC dimmers. The
•
Integrated, vertical 600V MOSFET with
LM3448 provides a constant current for illuminating
superior avalanche energy capability
high power LEDs and includes a phase angle dim
decoder. The dim decoder allows wide range LED
decoder. The dim decoder allows wide range LED
•
Application voltage range 85V
AC
– 265V
AC
dimming using standard forward and reverse phase
•
Adjustable switching frequency
TRIAC dimmers. The integrated high-voltage and low
•
Adaptive programmable off-time allows for
Rdson MOSFET reduces design complexity while
constant ripple current
improving LED driver efficiency. The integrated and
patented architecture facilitates implementation of
patented architecture facilitates implementation of
•
No 120Hz flicker possible
small form factor LED drivers suitable for integrated
•
Low quiescent current
LED lamps with very low external component count.
•
Thermal shutdown
The LM3448 also provides the flexibility required to
•
Low profile 16-pin Narrow SOIC package
implement both isolated and non-isolated solutions
based on the Flyback, Buck or Buck-Boost topology
based on the Flyback, Buck or Buck-Boost topology
•
Wave solder capable
using either active or passive power factor correction
(Valley-Fill)
(Valley-Fill)
circuits.
Additional
features
include
APPLICATIONS
thermal shutdown, current limit and V
CC
under-
•
Retrofit TRIAC Dimming
voltage lockout.
•
Solid State Lighting
•
Industrial and Commercial Lighting
•
Residential Lighting
Typical LM3448 LED Driver Application Circuit
Figure 1. Typical Application Circuit
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PRODUCTION DATA information is current as of publication date.
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Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.