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60V LED drivers offer adjustable over-temperature protection

Posted: 14 Feb 2013     Print Version  Bookmark and Share

Keywords:LED driver  light string  over temperature 

Infineon Technologies unveils two 60V DC/DC LED drivers that tout excellent power conversion efficiency, benchmark current accuracy that helps assure constant light output, and first-in-the-industry adjustable over-temperature protection that protects light elements from damage through overheating.

The ILD6070/ILD6150 drivers give lighting manufacturers the flexibility to produce multiple products using the same drivers, based on wide input voltage range from 4.5V to 60V, adjustable output current of up to either 0.7A or 1.5A, and support of digital or analogue dimming inputs, with a maximum dimming contract ratio as high as 3000:1.

With the addition of 60V devices to its portfolio, Infineon enables manufacturers to support as many as 18 LEDs in a light string, compared to a maximum of 12 LEDs in typically available 40V devices. This helps manufacturers to lower costs or achieve higher lumens in a lighting system. 

The new drivers extend Infineon's portfolio of switched-mode, buck (step-down) topology LED drivers for low voltage driven lighting applications, including indoor and outdoor systems in residential, commercial and industrial environments. They operate at up to 1MHz switching frequency, which reduces manufactured cost and PCB space by reducing the size of external components needed in a design. Reduced size is also supported by the high efficiency and corresponding improved thermal performance of the drivers. 

Other features of the new devices include a typical DC/DC conversion efficiency up to 98 per cent, which improves overall efficiency of a luminaire and reduces thermal load; current accuracy of 3 per cent across the full 4.5V to 60V input range, which contributes to exceptional stability of light output; and adjustable over temperature protection feature, which reduces light output when a threshold temperature is reached instead of turning off the light.

Samples of the ILD6070/ILD6150 drivers will be available in March, at a cost of Rs.81.97 ($1.50) and Rs.98.36 ($1.80), respectively. High volume pricing, above 10k quantity, of the DSO-8 packaged devices is approximately Rs.43.72 ($0.80). 

Designers working with Infineon LED driver ICs can access the "Infineon Light Desk" ( design tool. The tool allows quick design and simulation of LED Driver circuitries for all types of LED applications, with optional redesign, and download of the design summary with specification, schematics and bill of material.

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