NCP1611BDR2G(2011) 查看數據表（PDF） - ON Semiconductor

零件编号

产品描述 (功能)

生产厂家

NCP1611BDR2G
(Rev.:2011)

Enhanced, High-Efficiency Power Factor Controller

ON Semiconductor 

NCP1611

Enhanced, High-Efficiency

Power Factor Controller

The NCP1611 is designed to drive PFC boost stages based on an

innovative Current Controlled Frequency Fold−back (CCFF)

method. In this mode, the circuit classically operates in Critical

conduction Mode (CrM) when the inductor current exceeds a

programmable value. When the current is below this preset level, the

NCP1611 linearly decays the frequency down to about 20 kHz when

the current is null. CCFF maximizes the efficiency at both nominal

and light load. In particular, the stand−by losses are reduced to a

minimum.

Like in FCCrM controllers, internal circuitry allows near−unity

power factor even when the switching frequency is reduced. Housed in

a SO−8 package, the circuit also incorporates the features necessary

for robust and compact PFC stages, with few external components.

Features

• Near−Unity Power Factor

• Critical Conduction Mode (CrM)

• Current Controlled Frequency Fold−back (CCFF): Low Frequency

Operation is Forced at Low Current Levels

• On−time Modulation to Maintain a Proper Current Shaping in CCFF

Mode

• Skip Mode Near the Line Zero Crossing

• Fast Line / Load Transient Compensation (Dynamic Response

Enhancer)

• Valley Turn on

• High Drive Capability: −500 mA / +800 mA

• VCC Range: from 9.5 V to 35 V

• Low Start−up Consumption

• A Version: Low VCC Start−up Level (10.5 V), B Version: High VCC

Start−up level (17.0 V)

• Line Range Detection

• This is a Pb−Free Device

http://onsemi.com

MARKING

DIAGRAM

8

1

SOIC−8

CASE 751

SUFFIX D

8

NCP1611x

ALYW

G

1

NCP1611x = Specific Device Code

x = A or B

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G

= Pb−Free Package

PIN CONNECTIONS

Vcontrol

Vsense

FFcontrol

CS/ZCD

1

(Top View)

Feedback

VCC

DRV

GND

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 27 of this data sheet.

Safety Features

• Non−latching, Over−Voltage Protection

• Brown−Out Detection

• Soft−Start for Smooth Start−up Operation (A version)

• Over Current Limitation

• Disable Protection if the Feedback Pin is Not Connected

• Thermal Shutdown

• Low Duty−Cycle Operation if the Bypass Diode is

Shorted

• Open Ground Pin Fault Monitoring

Typical Applications

• PC Power Supplies

• All Off Line Appliances Requiring Power Factor

Correction

© Semiconductor Components Industries, LLC, 2011

1

December, 2011 − Rev. 1

Publication Order Number:

NCP1611/D

Share Link: