The NCL30186 is an AC-DC power factor corrected flyback controller targeting isolated and non−isolated “Smart−dimmable” constant current LED drivers. The controller operates in a quasi−resonant mode to provide optimal efficiency. The current control algorithm supports flyback, buck−boost, and SEPIC topologies. Thanks to a novel control method, the device is able to tightly regulate a constant LED current from the primary side. This removes the need for secondary side feedback circuitry, biasing and an optocoupler. The device is highly integrated with a minimum number of external components. A robust suite of safety protection is built in to simplify the design. This device is specifically intended for very compact space efficient designs and supports analog and PWM dimming with a dedicated dimming input intended to control the average LED current. To ensure reliable operation at elevated temperatures, a user configurable current foldback circuit is also provided. The NCL30086 is housed in the SOIC10 which has the same body size as a standard SOIC8.
Features | | Benefits
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Constant Current Control with Primary Side Feedback
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No Optocoupler or secondary control circuitry required
Power factor correction with low harmonic distortion
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Exceeds industry needs for lighting
Precise Current Regulation Accuracy
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No need for binning of LEDs or production trimming
Line feedforward for enhanced regulation accuracy
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Improve regulation acrross line variation
Wide Vcc operating range
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Supports wide range of LED forward voltages
User Programmable Thermal Foldback
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Protects LED driver from overheating under severe conditions
Open and Shorted LED/Output Diode Protection
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Enhanced fault handling
Wide temperature range of -40 to 125 °C
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Supports outdoor and high temperature environments
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