Skip to content. | Skip to navigation

Personal tools

The Global
Information Hub for
Lighting Technologies
and Design

Sections
Home > Components & Tools > Electronics & Smart Controls > Linear Technology LT3496: Triple Output LED Driver Drives Up to Eight 500mA LEDs in Series
Products, Materials + Tools | Jul 15, 2010

Linear Technology LT3496: Triple Output LED Driver Drives Up to Eight 500mA LEDs in Series

Linear Technology announces the H-grade version of the LT3496. The LT3496 is a 2MHz DC/DC converter designed to operate as a three-channel constant current LED driver. Each of the device’s three channels can drive up to eight 500mA LEDs in series, enabling it to drive up to 24 x 500mA LEDs at efficiencies up to 96%.

The H-grade version operates up to a junction temperature of 150?C, compared to the E- and I-grade versions’ 125?C maximum junction temperature. All electrical specifications are identical for the E-, I- and H-grade versions. The H-grade parts are tested and guaranteed to the maximum junction temperature of 150?C. They are ideal for automotive and industrial applications which are subjected to high ambient temperatures.

The LT3496 senses output current at the high side of the LED, enabling buck, buck-boost or boost configurations. Each channel is operated by an independent True Color PWM™ signal, enabling each to be dimmed independently to ratios as high as 3,000:1. A fixed frequency, current-mode architecture ensures stable operation over a wide range of supply and output voltages. A frequency adjust pin enables the user to program the frequency between 330kHz and 2.1MHz to optimize efficiency while minimizing external component size. The LT3496’s thermally enhanced 4mm x 5mm QFN package provides a highly compact solution footprint for 50W LED applications.

Summary of Features: LT3496H:
• Maximum Junction Temperature of 150°C
• True Color PWM™ Dimming Delivers up to 3000:1 Dimming Ratio
• Built-In Gate Driver for PMOS LED Disconnect
• Three Independent Driver Channels with 700mA, 45V Internal Switches
• Operates in Buck, Boost, Buck-Boost Modes
• CTRL Pin Accurately Sets LED Current Sense Threshold Over a Range of 10mV to 100mV
• Low Quiescent Current: 6mA in Active Mode
• <10uA in Shutdown Mode
• Adjustable Switching Frequency: 300kHz to 2.1MHz
• Open LED Protection
• Wide Input Voltage Range: 3V to 40V
• Surface Mount Components
• 28-Lead (4mm x 5mm) QFN Package

The LT3496HUFD is available from stock in a 4mm x 5mm QFN-28 package. Pricing starts at $4.45 each for 1,000 piece quantities. For more information, visit www.linear.com/pr/3496.

FEATURED

When Very High Light Output and Efficiency are Required for Demanding Applications, New LUXEON 7070 Checks All the Boxes

When Very High Light Output and Efficiency are Required for Demanding Applications, New LUXEON 7070 Checks All the Boxes More lumens, higher efficacy, and lower system costs are the driving forces behind new designs for a broad range of indoor and outdoor high light output applications. Lumileds new LUXEON 7070, introduced today, is designed to outperform similar lead-frame and ceramic high-power solutions with ... Read more »

FEATURED

NEW Extreme High Power LEDs Deliver Best Optical Performance

NEW Extreme High Power LEDs Deliver Best Optical Performance New XLamp® XHP70.3 LEDs deliver the best lumen density, reliability and optical control available in a 7x7 mm footprint.   Read more »

FEATURED

Edison Opto UVA + W & UVC Series Customize Design Solution

Edison Opto UVA + W & UVC Series Customize Design Solution Edison Opto offers customized UVA + White and UVC solutions for continuous disinfection to reduce bacteria and airborne viruses. In the wake of the global outbreak of COVID-19, the people’s need for anti-epidemic, sterilization, and anti-virus products has escalated, ranging from portable ... Read more »

EDITORIAL

deLIGHTed Talks: Good Light – Good Life in Wintertime, November 3, 2021

deLIGHTed Talks: Good Light – Good Life in Wintertime,  November 3, 2021 The Good Light Group, together with the Society for Light Treatment and Biological Rhythms (SLTBR), the Daylight Academy (DLA), the International Association of Lighting Designers (IALD), and Luger Research (LR), are organizing and presenting the “Good Light – Good Life” lectures. The webinar ... Read more »

page_peel