NCL30083ADMR2G datasheet(1/35 Pages) ONSEMI

Part #	NCL30083ADMR2G

Description	Dimmable Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting with Thermal Fold-back

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Manufacturer	ONSEMI [ON Semiconductor]

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January, 2015 − Rev. 2

1

Publication Order Number:

NCL30083/D

NCL30083

Dimmable Quasi-Resonant

Primary Side Current-Mode

Controller for LED Lighting

with Thermal Fold-back

The NCL30083 is a PWM current mode controller targeting isolated

flyback and non−isolated constant current topologies. The controller

operates in a quasi−resonant mode to provide high efficiency. Thanks

to a novel control method, the device is able to precisely 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. It supports step dimming by monitoring the AC line

and detecting when the line has been toggled on−off−on by the user to

reduce the light intensity in 5 steps down to 5% dimming.

Features

• Quasi−resonant Peak Current−mode Control Operation

• Primary Side Sensing (no optocoupler needed)

• Wide VCC Range

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

• Precise LED Constant Current Regulation ±1% Typical

• Line Feed−forward for Enhanced Regulation Accuracy

• Low LED Current Ripple

• 250 mV ±2% Guaranteed Voltage Reference for Current Regulation

• ~ 0.9 Power Factor with Valley Fill Input Stage

• Low Start−up Current (13 mA typ.)

• 5 State Quasi−log Dimmable

• Thermal Fold−back

• Programmable soft−start

• Wide Temperature Range of −40 to +125°C

• Pb−free, Halide−free MSL1 Product

• Robust Protection Features

♦ Over Voltage / LED Open Circuit Protection

♦ Over Temperature Protection

♦ Secondary Diode Short Protection

♦ Output Short Circuit Protection

♦ Shorted Current Sense Pin Fault Detection

♦ Latched and Auto−recoverable Versions

♦ Brown−out

♦ VCC Under Voltage Lockout

♦ Thermal Shutdown

Typical Applications

• Integral LED Bulbs

• LED Power Driver Supplies

• LED Light Engines

www.onsemi.com

PIN CONNECTIONS

See detailed ordering and shipping information in the package

dimensions section on page 35 of this data sheet.

ORDERING INFORMATION

MARKING DIAGRAM

AAx

= Specific Device Code

x

= E or F

A

= Assembly Location

Y

= Year

W

= Work Week

G

= Pb−Free Package

(Note: Microdot may be in either location)

AAx

AYW

G

1

8

SS

VIN

VCC

DRV

SD

ZCD

CS

GND

(Top View)

1

Micro8

DM SUFFIX

CASE 846A

1

8

SOIC−8

D SUFFIX

CASE 751

1

8

L30083x = Specific Device Code

x= B

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G

= Pb−Free Package

L30083x

ALYW

G

1

8

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NCL30083ADMR2G Datasheet(PDF) 1 Page - ON Semiconductor

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