NCL30085BDR2G datasheet(1/27 Pages) ONSEMI

Part #	NCL30085BDR2G

Description	Quasi-Resonant Primary Side Current-Mode Controller

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Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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April, 2015 − Rev. 3

1

Publication Order Number:

NCL30085/D

NCL30085

Power Factor Corrected

Quasi-Resonant Primary

Side Current-Mode

Controller for LED Lighting

with Line Step Dimming and

Thermal Foldback

The NCL30085 is a power factor corrected flyback controller

targeting isolated and non−isolated 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 device is specifically intended for very compact,

space efficient designs and supports 3 levels of log step dimming

which allows light output reduction by toggling the main AC switch

on and off to signal the controller to reduce the LED current point

down to 5% of full load.

Features

• Quasi−resonant Peak Current−mode Control Operation

• Constant Current Control with Primary Side Feedback

• Tight LED Constant Current Regulation of ±2% Typical

• Power Factor Correction

• 3 Step Dimming (70/25/5%)

• Line Feedforward for Enhanced Regulation Accuracy

• Low Start−up Current (10 mA typ.)

• Wide Vcc Range

• 300 mA / 500 mA Totem Pole Driver with 12 V Gate Clamp

• Robust Protection Features

♦ OVP on VCC

♦ Programmable Over Voltage / LED Open Circuit Protection

♦ Cycle−by−cycle Peak Current Limit

♦ Winding Short Circuit Protection

♦ Secondary Diode Short Protection

♦ Output Short Circuit Protection

♦ Current Sense Short Protection

♦ User Programmable NTC Based Thermal Foldback

♦ Thermal Shutdown

♦ Vcc Undervoltage Lockout

♦ Brown−out Protection

• Pb−Free, Halide−Free MSL1 Product

Typical Applications

• Integral LED Bulbs and Tubes

• LED Light Engines

• LED Drivers/Power Supplies

www.onsemi.com

SOIC−8 NB

CASE 751

PIN CONNECTIONS

MARKING DIAGRAM

(Top View)

L30085x = Specific Device Code

x = A, B

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G

= Pb-Free Package

See detailed ordering and shipping information in the package

dimensions section on page 26 of this data sheet.

ORDERING INFORMATION

VCC

DRV

GND

1

CS

VS

COMP

ZCD

SD

1

8

L30085x

ALYW

G

1

8

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