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LM3448 Folha de dados(PDF) 1 Page - Texas Instruments

Nome de Peças LM3448
Descrição Electrónicos  Phase Dimmable Offline LED Driver with Integrated FET
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

LM3448 Folha de dados(HTML) 1 Page - Texas Instruments

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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
LM3448
www.ti.com
SNOSB51B – SEPTEMBER 2011 – REVISED NOVEMBER 2011
LM3448 Phase Dimmable Offline LED Driver with Integrated FET
Check for Samples: LM3448
1
FEATURES
DESCRIPTION
The LM3448 is an adaptive constant off-time AC/DC
23
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
Application voltage range 85VAC – 265VAC
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
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
Wave solder capable
using either active or passive power factor correction
(Valley-Fill)
circuits.
Additional
features
include
APPLICATIONS
thermal shutdown, current limit and VCC 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
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
TRI-STATE is a trademark of Texas Instruments.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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