Linear's LT3596 drives up to 30 LEDs in a display

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Linear Technology has a 60V, 1MHz step-down DC/DC converter which is designed to drive up to 30 LEDs in a display, writes Richard Wilson.

From a 48V input, the LT3596 can drive up to three strings of LEDs, each with up to ten 100mA LEDs in series, delivering efficiencies of over 90%.

The converter uses a single 800mA, 60V internal switch to provide a step-down constant current source. The internal buck converter uses an adaptive feedback loop to regulate the output voltage slightly higher than the required LED voltage to maintain efficiency.
 
The input voltage range of 6V to 60V is tuned for automotive and industrial applications.

There is also current matching for uniform display brightness and PWM dimming offers dimming ratios as high as 10,000:1.

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Paul Ward
As Opto Product Manager at Farnell, Paul is overseeing the company's involvement in the rapidly evolving and high profile LED lighting market sector.

As well as ensuring that Farnell offers the latest technologies and products related to solid state lighting, Paul is also responsible for ensuring that the resources are in place to make it easier for design engineers to specify and design-in LED solutions for their applications.

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ian bryant.jpgIan Bryant is Business Development Manager LED Division at Carclo Technical Plastics. He has worked on and off at Carclo (Formerly Combined Optical Industrial) since leaving school. He has worked through the company from Toolmaking to starting the company on the road of LED optics business some 6-7 years ago, starting with a standard range and more in line with the business of custom optics. In between all this he has worked in engineering and as a works Director for a hydraulics company but kept getting pulled back to the optics industrial. We are able to offer the full solution from idea to parts so have a very good understanding on what is needed. You will see some posts from our design team also under my name.

About this Entry

This page contains a single entry by Alun Williams - Electronics Weekly.com published on July 30, 2010 8:36 AM.

LED driver integrates PFC and isolated step-down AC-DC power conversion was the previous entry in this blog.

Marl launches LED equivalent to MR16 halogen light is the next entry in this blog.

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