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NCL30051

PFC and Half-Bridge Resonant Combo Controller for LED Lighting

ON Semiconductor 

NCL30051

PFC and Half-Bridge

Resonant Combo Controller

for LED Lighting

The NCL30051 is a combination of PFC and half−bridge resonant

controllers optimized for off−line LED lighting solutions. This

device integrates all the features needed to implement a highly

efficient and small form factor LED Driver/Power Supply. It contains

a critical conduction mode (CrM) power factor correction (PFC)

boost controller and a half−bridge resonant controller with a built−in

600 V driver. The half−bridge stage operates at a fixed frequency,

greatly simplifying the control implementations. The output (current

or voltage) regulation is achieved by adjusting the PFC stage output

voltage − based on a control signal generated external to the

NCL30051.

This device includes an enable input on the PFC feedback pin,

open feedback loop protection and PFC overvoltage and

undervoltage detectors. Other features included in the NCL30051 are

a 600 V startup circuit and an adjustable frequency oscillator with a

divide by 2 circuit to assure true symmetric duty ratio. The controllers

are properly sequenced, simplifying system design.

Features

• Voltage Mode CrM Power Factor Correction Controller

• PFC Open Feedback Loop Protection

• PFC Undervoltage Detector

• PFC Overvoltage Detector

• Half−Bridge Stage with 600 V High Side Gate Drive

• State Machine Ensures Proper Turn−on and Turn−off of

Half−Bridge Stage

• Controllers are Properly Sequenced for Fault Free Operation

• Non−Latching Fault Management

• Internal 600 V Startup Circuit

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

• This is a Pb−Free Device

Typical Applications

• High Efficiency LED Drivers and Power Supplies

• Electronic Control Gear

• Lighting Ballasts

http://onsemi.com

MARKING

DIAGRAM

16

SOIC−16

D SUFFIX

CASE 751B

NCL30051G

AWLYWW

1

A

= Assembly Location

WL = Wafer Lot

Y

= Year

WW = Work Week

G

= Pb−Free Package

PIN CONNECTIONS

1

HV

HBoost

OSC

HDRVhi

GND

HVS

VREF

HDRVlo

PFB

PDRV

PCS

PGND

PZCD

VCC

PControl

PCT

SOIC−16

ORDERING INFORMATION

Device

Package

Shipping†

NCL30051DR2G SOIC−16 2500/Tape & Reel

(Pb−Free)

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specification

Brochure, BRD8011/D.

© Semiconductor Components Industries, LLC, 2011

1

November, 2011 − Rev. 0

Publication Order Number:

NCL30051/D

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