© Semiconductor Components Industries, LLC, 2012

March, 2012 − Rev. 0

1

Publication Order Number:

NCL30002/D

NCL30002

Power Factor Corrected

Buck LED Driver

The NCL30002 is a switch mode power supply controller intended

for low to medium power single stage power factor (PF) corrected

LED Drivers. The device operates as a critical conduction mode

(CrM) buck controller to regulate LED current at a high power factor

for a specific line voltage range. The current limit threshold is tightly

trimmed allowing open loop control techniques to reduce parts count

while maintaining accurate current regulation and high power factor.

CrM operation is particularly suited for LED applications as very high

efficiency can be achieved even at low power levels. These are

important in LED lighting to comply with regulatory requirements and

meet overall system luminous efficacy requirements. In CrM, the

switching frequency will vary with line and load. Switching losses are

low as recovery losses in the output rectifier are negligible since the

current goes to zero prior to reactivating the main MOSFET switch.

The device features a programmable on time limiter, zero current

detect sense block, gate driver, trans−conductance error amplifier as

well as all PWM control circuitry and protection functions required to

implement a CrM switch mode power supply. Moreover, for high

efficiency, the device features low startup current enabling fast, low

threshold has been set at 485 mV to minimize power dissipation in the

external sense resistor. To support the environmental operation range

of Solid State Lighting, the device is specified across a wide junction

temperature range of −40

°C to 125°C.

Features

Compliant

Typical Applications

http://onsemi.com

SOIC−8

D SUFFIX

CASE 751

MARKING

DIAGRAM

PIN CONNECTION

1

8

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G

= Pb−Free Package

L0002

ALYW

G

1

8

MFP

Comp

Ct

CS

DRV

GND

ZCD

(Top View)

Device

Package

ORDERING INFORMATION

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

NCL30002DR2G

SOIC−8

(Pb−Free)

2500 / Tape & Reel