NCL30085: AC-DC Power Factor Corrected 3 Step Dimmable Quasi-Resonant Primary Side Current Mode Controller for LED Lighting

Datasheet: Power Factor Corrected Quasi-Resonant Primary Side Current Mode Controller for LED Lighting with Line Step Dimming and Thermal Foldback
Rev. 3 (310kB)
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The NCL30085 is an AC-DC power factor corrected flyback controller targeting isolated and non−isolated buck-boost/SEPIC constant current LED drivers. The controller operates in a quasi−resonant mode to provide optimal efficiency. 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 controller has integrated 3 step log dimming which allows an LED bulb or luminaire to be dimming from a standard wall switch. In addition to steps of 70% and 25% which are similar to a traditional 3 way lamp, one additional step of 5% current is included to support deep dimming applications.
Features   Benefits
  • Constant Current Control with Primary Side Feedback
  • No optocoupler or secondary control circuitry required
  • Precise Current Regulation Accuracy
  • No need for binning of LEDs or production trimming for accuracy
  • Power Factor Correction with low harmonic distortion
  • Exceeds industry requirements for lighting
  • 3 dimmable steps of 70%, 25%, and 5% of full current
  • Energy saving dimming with standard wall switch
  • Line Feedforward for Enhanced Regulation Accuracy
  • Supports accurate regulation for universal mains applications
  • Wide Vcc operating range
  • Simplifies support for a broad range of LED forward voltages with one magnetic design
  • User Programmable Thermal Foldback
  • Protects LED driver from overheating in severe situations
  • Output LED open and short protection
  • Robust fault handling of common LED system faults
  • Secondary Diode Short Protection
  • Avoids overheating in fault condition
  • VCC undervoltage and overvoltage protection
  • Robust fault handling
  • Wide Temperature range of -40 to 125 °C
  • Supports outdoor and high temperature environments
  • Auto-recoverable (B-version) and Latched (A-version) fault handling options
Applications   End Products
  • Integrated LED Driver Electronics
  • LED Bulbs
  • LED Driver Power Supplies
  • LED Light Engines
  • LED Tubes
  • Electronic Control Gear for LED Systems
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
Power Factor Corrected 3 Step Dimmable Evaluation Board
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NCL30085BDR2G Last Shipments
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NCL30085, with auto-recoverable fault handling SOIC-8 751-07 3 260 Tape and Reel 2500  
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Power Factor Corrected 3 Step Dimmable Evaluation Board - NCL30085FLYGEVB
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