IC-Hersteller Texas Instruments

IC-Hersteller (96)

Texas Instruments LM3448

Phase Dimmable Offline LED Driver with Integrated FET

Details

TopologieSperrwandler
Eingangsspannung85-135 V
Ausgang 133 V / 0.23 A
IC-RevisionC

Beschreibung

The LM3448 is an adaptive constant off-time AC/DC buck (step-down) constant current LED regulator designed to be compatible with TRIAC dimmers. The LM3448 provides a constant current for illuminating high power LEDs and includes a phase angle dim decoder. The dim decoder allows wide range LED dimming using standard forward and reverse phaseTRIAC dimmers. The integrated high-voltage and low Rdson MOSFET reduces design complexity while improving LED driver efficiency. The integrated and patented architecture facilitates implementation of small form factor LED drivers suitable for integrated LED lamps with very low external component count. The LM3448 also provides the flexibility required to implement both isolated and non-isolated solutions based on the Flyback, Buck or Buck-Boost topology using either active or passive power factor correction (Valley-Fill) circuits. Additional features include thermal shutdown, current limit and VCC under voltage lockout.

Eigenschaften

  • Input phase angle dim decoder circuit for LED dimming
  • Integrated, vertical 600V MOSFET with superior avalanche energy capability
  • Application voltage range 85VAC – 265VAC
  • Adjustable switching frequency
  • Adaptive programmable off-time allows for constant ripple current
  • No 120Hz flicker possible
  • Low quiescent current
  • Thermal shutdown
  • Low profile 16-pin Narrow SOIC package
  • Wave solder capable

Typische Anwendungen

  • Residential Lighting
  • Solid State Lighting
  • Industrial Lighting
  • Commercial Lighting

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieVinVOut1
(V)
IOut1
(mA)
Vaux
(V)
fswitch
(kHz)
L
(mH)
NPRI : NSEC : NAUXISAT
(mA)
VT
(V (AC))
L
(mm)
W
(mm)
H
(mm)
MontageartBauform Muster
750813046SPEC
5 Dateien MID-OLTI Offline Flyback Transformers for Texas Instruments 85 - 135 V (AC) 26.6 250 12 72 1.44 3.94:1:0.47 600 4500 16.9 18.8 13.31 THT EE16/7/5
Artikel Nr. Daten­blatt Simu­lation
750813046SPEC
Muster
Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieVinVOut1
(V)
IOut1
(mA)
Vaux
(V)
fswitch
(kHz)
L
(mH)
NPRI : NSEC : NAUXISAT
(mA)
VT
(V (AC))
L
(mm)
W
(mm)
H
(mm)
MontageartBauform Muster