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NCP1608

Critical Conduction Mode PFC Controller Utilizing OTA

ON Semiconductor 

NCP1608

Critical Conduction Mode

PFC Controller Utilizing OTA

The NCP1608 is an active power factor correction (PFC)

controller specifically designed for use as a pre−converter in ac−dc

adapters, electronic ballasts, and other medium power off−line

converters (typically up to 350 W). It uses Critical Conduction Mode

(CrM) to ensure near unity power factor across a wide range of input

voltages and output power. The NCP1608 minimizes the number of

external components by integrating safety features, making it an

excellent choice for designing robust PFC stages. It is available in a

SOIC−8 package.

General Features

• Near Unity Power Factor

• No Input Voltage Sensing Requirement

• Latching PWM for Cycle−by−Cycle On Time Control (Voltage

Mode)

• Wide Control Range for High Power Application (>150 W) Noise

Immunity

• Transconductance Amplifier

• High Precision Voltage Reference (±1.6% Over the Temperature

Range)

• Very Low Startup Current Consumption (≤ 35 mA)

• Low Typical Operating Current Consumption (2.1 mA)

• Source 500 mA / Sink 800 mA Totem Pole Gate Driver

• Undervoltage Lockout with Hysteresis

• Pin−to−Pin Compatible with Industry Standards

• This is a Pb−Free and Halide−Free Device

Safety Features

• Overvoltage Protection

• Undervoltage Protection

• Open/Floating Feedback Loop Protection

• Overcurrent Protection

• Accurate and Programmable On Time Limitation

Typical Applications

• Solid State Lighting

• Electronic Light Ballast

• AC Adapters, TVs, Monitors

• All Off−Line Appliances Requiring Power Factor Correction

http://onsemi.com

MARKING

8

DIAGRAM

1

SOIC−8

D SUFFIX

CASE 751

8

1608B

ALYW

G

1

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G

= Pb−Free Package

PIN CONNECTION

FB

Control

Ct

CS

(Top View)

VCC

DRV

GND

ZCD

ORDERING INFORMATION

Device

Package

Shipping†

NCP1608BDR2G SOIC−8 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 Specifications

Brochure, BRD8011/D.

© Semiconductor Components Industries, LLC, 2009

1

April, 2009 − Rev. 0

Publication Order Number:

NCP1608/D

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