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IC-Hersteller (96)

Texas Instruments LM3444

AC-DC Offline LED Driver

Details

TopologieSperrwandler
Eingangsspannung90-135 V
Ausgang 130 V / 0.35 A
IC-RevisionC

Beschreibung

The LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for illuminating high power LEDs. The high frequency capable architecture allows the use of small external passive components. A passive PFC circuit ensures good power factor by drawing current directly from the line for most of the cycle, and provides a constant positive voltage to the buck regulator. Additional features include thermal shutdown, current limit and VCC under-voltagelockout. The LM3444 is available in a low profile 10- pin VSSOP package or an 8-lead SOIC package.

Eigenschaften

  • Application Voltage Range 80VAC – 277VAC
  • Capable of Controlling LED Currents Greater than 1A
  • Adjustable Switching Frequency
  • Low Quiescent Current
  • Adaptive Programmable Off-time Allows for Constant Ripple Current
  • Thermal Shutdown
  • No 120Hz Flicker
  • Low Profile 10-Pin VSSOP Package or 8-Lead SOIC Package
  • Patent Pending Drive Architecture

Remarks:

L1=L2=3.9mh is used as input signal

Typische Anwendungen

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

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieVinVOut1
(V)
IOut1
(A)
fswitch
(kHz)
L
(µH)
NPRI : NSEC : NAUXVT
(V (AC))
L
(mm)
W
(mm)
H
(mm)
MontageartBauform Muster
750311553SPEC
4 Dateien MID-OLTI Offline Flyback Transformers for Texas Instruments 90 - 140 V (AC) 25 0.4 100 803 4:1 4500 20.32 24.38 16 THT EE16/8/5
Artikel Nr. Daten­blatt Simu­lation
750311553SPEC
Muster
Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieVinVOut1
(V)
IOut1
(A)
fswitch
(kHz)
L
(µH)
NPRI : NSEC : NAUXVT
(V (AC))
L
(mm)
W
(mm)
H
(mm)
MontageartBauform Muster