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Texas Instruments LM3447MTX/NOPB — Analog & Data Acquisition
Texas Instruments

LM3447MTX/NOPB AC DC Offline Switcher, Triac Dimming

MPNLM3447MTX/NOPB
End of Life

Texas Instruments LM3447MTX/NOPB AC DC Offline Switcher, Triac dimming, Flyback topology, 19V output, Surface Mount 14-TSSOP, -40°C to 125°C.

$1.58Ref. price · indicative, final on quote
LM3447MTX/NOPB datasheet
Packaging14-TSSOP (0.173", 4.40mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

LM3447MTX/NOPB Technical Specifications
ParameterValue
TypeAC DC Offline Switcher
Mounting typeSurface Mount
Voltage - output19V
Voltage17.5V
Number of outputs1
Operating temperature-40°C ~ 125°C (TJ)
DimmingTriac
PackageTape & Reel (TR); Cut Tape (CT)
TopologyFlyback
ApplicationsLighting
Case14-TSSOP (0.173\", 4.40mm Width)
Internal switchNo

Product details

Offline LED driver with Triac dimming — what it is and where it fits

The Texas Instruments LM3447MTX/NOPB is an AC DC offline switcher designed for LED lighting applications, supporting Triac dimming in a flyback topology. It delivers a regulated 19V output from a single channel, with no internal power switch — an external MOSFET handles the switching. The part is housed in a 14-TSSOP package for surface-mount assembly, rated over -40°C to 125°C junction temperature, making it suitable for outdoor luminaires, downlights, and retrofit LED bulbs where existing wall dimmers must be preserved.

Lifecycle and compliance — no obsolescence worry

No last-time-buy or end-of-life notice applies here — this is a current-catalog part from Texas Instruments.

Frequently asked questions

How does LM3447MTX/NOPB dimming work with Triac?

The controller is designed to work with standard forward-phase Triac dimmers used in residential and commercial lighting. It senses the dimmer's conduction angle and adjusts the LED current accordingly, maintaining compatibility with existing wall dimmers without additional wiring.