NCL30082_13 datasheet(1/33 Pages) ONSEMI

Part #	NCL30082

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

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April, 2013 − Rev. 0

1

Publication Order Number:

NCL30082/D

NCL30082

Dimmable Quasi-Resonant

Primary Side Current-Mode

Controller for LED Lighting

with Thermal Fold-back

The NCL30082 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 supports analog/digital dimming as well as

thermal current fold−back. While the NCL30082 has integrated fixed

overvoltage protection, the designer has the flexibility to program a

lower OVP level.

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.)

• Analog or Digital Dimming

• Thermal Fold−back

• 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

http://onsemi.com

PIN CONNECTIONS

See detailed ordering and shipping information in the package

dimensions section on page 32 of this data sheet.

ORDERING INFORMATION

Micro8

DM SUFFIX

CASE 846A

MARKING DIAGRAM

AAx

= Specific Device Code

x

= C or D

A

= Assembly Location

Y

= Year

W

= Work Week

G

= Pb−Free Package

(Note: Microdot may be in either location)

AAx

AYWG

G

1

8

DIM

VIN

VCC

DRV

SD

ZCD

CS

GND

(Top View)

1

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