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Optoelectronics/Displays  

HBLED driver supports high-side current sense

Posted: 09 Nov 2010     Print Version  Bookmark and Share

Keywords:high brightness  LED driver  HBLED  current-sense 

Micrel Inc. releases the MIC3202, a hysteretic, step-down high brightness LED (HBLED) driver with high-side current sense offering reduced complexity, size and cost for interior/exterior lighting, architectural and ambient lighting, LED bulbs and other general illumination applications.

The MIC3202 has capacity for handling up to eight 1A HBLEDs in series at over 90 per cent efficiency with ±5 per cent current accuracy from input voltages of 6V to 37V. The device yields constant current with changes in input voltage and output load with its hysteretic control architecture and high-side current sense scheme. Its operating frequency is adjustable up to 1MHz giving design flexibility.

The MIC3202 features a dedicated PWM dimming pin permitting ultra wide contrast ratios, as well as an enable pin for very low power shutdown, over temperature protection and UVLO. It has an internal power switch which doesn't need external compensation. Finally, the MIC3202 comes in an exposed pad SOIC-8L package.

The MIC3202 is now available for order in volume quantities, with price starting at Rs.57.62 ($1.29) for 1,000 units.

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