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

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

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

Benefits

No optocoupler or secondary control circuitry required
No need for binning of LEDs or production trimming for accuracy
Exceeds industry requirements for lighting
Energy saving dimming with standard wall switch
Supports accurate regulation for universal mains applications
Simplifies support for a broad range of LED forward voltages with one magnetic design
Protects LED driver from overheating in severe situations
Robust fault handling of common LED system faults
Avoids overheating in fault condition
Robust fault handling
Supports outdoor and high temperature environments

Applications

Integrated LED Driver Electronics

End Products

LED Bulbs
LED Driver Power Supplies
LED Light Engines
LED Tubes
Electronic Control Gear for LED Systems

Design & Development Tools (1)

Document Title	Document ID/Size	Revision	Revision Date
NCL30085-6-8 EXCEL Design Tool	NCL30085 Design Tool (62kB)	0	Oct, 2014

Package Drawings (1)

Document Title	Document ID/Size	Revision
SOIC-8 Narrow Body	751-07 (62.6kB)	AK

Application Notes (3)

Document Title	Document ID/Size	Revision	Revision Date
4 Key Steps to Design a NCL30088-Controlled LED Driver	AND9200/D (805kB)	2	Apr, 2016
Designing a NCL30085-Controlled LED Driver	AND9205/D (600kB)	0	Mar, 2015
NCL30088 and NCL30085 Safety Test Consideration	AND9204/D (191kB)	0	Feb, 2015

Data Sheets (1)

Document Title	Document ID/Size	Revision	Revision Date
Power Factor Corrected Quasi-Resonant Primary Side Current Mode Controller for LED Lighting	NCL30085/D (310kB)	3	Apr, 2015

Evaluation Board Documents (5)

Document Title	Document ID/Size	Revision Date
10 W High Power Factor Isolated LED Driver Evaluation Board User's Manual	EVBUM2287/D (1265kB)	Dec, 2014
NCL30085FLYGEVB Bill of Materials ROHS Compliant	NCL30085FLYGEVB_BOM_ROHS.pdf (38kB)
NCL30085FLYGEVB Gerber Layout Files (Zip Format)	NCL30085FLYGEVB_GERBER.zip (163kB)
NCL30085FLYGEVB Schematic	NCL30085FLYGEVB_SCHEMATIC.pdf (169kB)
NCL30085FLYGEVB Test Procedure	NCL30085FLYGEVB_TEST_PROCEDURE.pdf (277kB)

Evaluation/Development Tool Information

Product	Status	Compliance	Short Description
NCL30085FLYGEVB	Active	Pb-free	Power Factor Corrected 3 Step Dimmable Evaluation Board

Order Information

Product	Status	Compliance	Package		MSL*	Container		Budgetary Price/Unit
NCL30085ADR2G	Product Preview	Pb-free Halide free	SOIC-8	751-07	3	Tape and Reel	2500	Contact BDTIC
NCL30085BDR2G	Active	Pb-free Halide free	SOIC-8	751-07	3	Tape and Reel	2500	$0.34