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LM3444MAX Fiches technique(PDF) 1 Page - Texas Instruments |
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LM3444MAX Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 30 page ICOLL V+ VAC + + 1 2 3 4 5 6 7 8 9 1 0 - VLED G N D VC C FILT ER NC NC ISN S GAT E NC CO FF N C LM344 4 VLED- D 3 C 7 C 9 C 1 0 D 4 D 8 D 9 R 2 D 1 Q 1 C 5 C 1 2 D2 D1 0 Q2 L 2 Q3 R 3 R 4 C 1 1 C 4 U1 VBUCK BR1 LINE VOLTAGE (VAC) 95.0 90.0 85.0 80.0 75.0 80 90 100 110 120 130 140 14 Series connected LEDs 10 Series connected LEDs LM3444 www.ti.com SNVS682C – NOVEMBER 2010 – REVISED MAY 2013 AC-DC Offline LED Driver Check for Samples: LM3444 1 FEATURES DESCRIPTION The LM3444 is an adaptive constant off-time AC/DC 2 • Application Voltage Range 80VAC – 277VAC buck (step-down) constant current controller that • Capable of Controlling LED Currents Greater provides a constant current for illuminating high than 1A power LEDs. The high frequency capable architecture • Adjustable Switching Frequency allows the use of small external passive components. A passive PFC circuit ensures good power factor by • Low Quiescent Current drawing current directly from the line for most of the • Adaptive Programmable Off-time Allows for cycle, and provides a constant positive voltage to the Constant Ripple Current buck regulator. Additional features include thermal • Thermal Shutdown shutdown, current limit and VCC under-voltage lockout. The LM3444 is available in a low profile 10- • No 120Hz Flicker pin VSSOP package or an 8-lead SOIC package. • Low Profile 10-Pin VSSOP Package or 8-Lead SOIC Package • Patent Pending Drive Architecture APPLICATIONS • Solid State Lighting • Industrial and Commercial Lighting • Residential Lighting TYPICAL LM3444 LED DRIVER 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 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2010–2013, 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. |
Numéro de pièce similaire - LM3444MAX |
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Description similaire - LM3444MAX |
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