03 February 2012
LED driver handles more demanding lighting applications
Diodes has unveiled a new led driver designed to handle a broad a range of applications including those subject to the greatest variance in input range, such as automotive lighting and 12Vac powered systems.
According to the company, the ZXLD1371 led driver can control an external driver FET in buck, boost and buck boost driver topologies, and is capable of driving up to 20 high current leds in boost mode with a high level of accuracy.
Diodes has extended its input voltage operation from 60V down to as low as 5V and employs the company's patent pending control loops and single resistor high side current sensing. This, says the semiconductor specialist, enables the device to deliver a typical output current tolerance of 1%, helping to produce improvements in brightness control and lamp luminance matching. Dimming is available over a wide dynamic range, through separate 20:1 dc dimming and 1000:1 pwm dimming options, resulting in what Diodes describes as higher accuracy light control, particularly at lower brightness levels.
The ZXLD1371 is designed to provide thermal management of leds vie a dedicated external thermistor input which, combined with fault diagnostic outputs reporting led load and driver status, is said to increase led longevity. Switching at up to 1MHz, the TSSOP-16EP packaged led driver controller is also designed to help minimise circuit size by reducing the value of the external inductor.
Author
Chris Shaw
Supporting Information
Websites
http://www.diodes.com
Companies
Diodes Incorporated
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