NCL30085 Series

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

Catalog

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

Part	Operating Temperature [Min]	Operating Temperature [Max]	Dimming	Internal Switch(s)	Voltage - Supply (Max) [Max]	Supplier Device Package	Voltage - Supply (Min) [Min]	Type	Package / Case	Package / Case [y]	Package / Case [x]	Number of Outputs	Topology	Mounting Type
ON Semiconductor NCL30085BDR2G	-40 °C	125 °C	Multi-Step		20 V	8-SOIC	8.8 V	AC DC Offline Switcher	8-SOIC	3.9 mm	0.154 in	1	Flyback	Surface Mount

Catalog

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

Key Features

• Constant Current Control with Primary Side Feedback

• Precise Current Regulation Accuracy

• Power Factor Correction with low harmonic distortion

• 3 dimmable steps of 70%, 25%, and 5% of full current

• Line Feedforward for Enhanced Regulation Accuracy

• Wide Vcc operating range

• User Programmable Thermal Foldback

• Output LED open and short protection

• Secondary Diode Short Protection

• VCC undervoltage and overvoltage protection

• Wide Temperature range of -40 to 125 °C

• Auto-recoverable (B-version) and Latched (A-version) fault handling options

Description

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.