NCP1611 Datasheet: High-Efficiency Power Factor Controller





NCP1611 High-Efficiency Power Factor Controller Datasheet

Part Number NCP1611
Description High-Efficiency Power Factor Controller
Manufacture ON Semiconductor
Total Page 29 Pages
PDF Download Download NCP1611 Datasheet PDF

Features: NCP1611 Enhanced, High-Efficiency Power Factor Controller The NCP1611 is desi gned to drive PFC boost stages based on an innovative Current Controlled Freq uency Fold−back (CCFF) method. In th is mode, the circuit classically operat es in Critical conduction Mode (CrM) wh en the inductor current exceeds a www. onsemi.com programmable value. When th e current is below this preset level, t he NCP1611 linearly decays the frequen cy down to about 20 kHz when MARKING the current is null. CCFF maximizes the efficiency at both nominal DIAGRAM a nd light load. In particular, the stand −by losses are reduced to a minimum. Like in FCCrM controllers, internal cir cuitry allows near−unity power factor even when the switching frequency is r educed. Housed in a SO−8 package, the circuit also incorporates the features necessary for robust and compact PFC s tages, with few external components. Fe atures • Near−Unity Power Factor Critical Conduction Mode (CrM) • Current Controlled Frequency Fold−back (CC.

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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
www.onsemi.com
programmable value. When the current is below this preset level, the
NCP1611 linearly decays the frequency down to about 20 kHz when
MARKING
the current is null. CCFF maximizes the efficiency at both nominal
DIAGRAM
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
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
Operation is Forced at Low Current Levels
On−time Modulation to Maintain a Proper Current Shaping in CCFF
Mode
PIN CONNECTIONS
Vcontrol
1
Feedback
Skip Mode Near the Line Zero Crossing
Vsense
VCC
Fast Line / Load Transient Compensation (Dynamic Response
FFcontrol
DRV
Enhancer)
CS/ZCD
GND
Valley Turn on
(Top View)
High Drive Capability: −500 mA / +800 mA
VCC Range: from 9.5 V to 35 V
Low Start−up Consumption
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 28 of this data sheet.
A Version: Low VCC Start−up Level (10.5 V), B Version: High VCC
Start−up level (17.0 V)
Line Range Detection
Configurable for Low Harmonic Content across Wide
Low Duty−Cycle Operation if the Bypass Diode is
Line/Load Range
Shorted
EN61000−3−2 Class C Compliant across Wide Load
Open Ground Pin Fault Monitoring
Range for Dimmable Light Ballasts
This is a Pb−Free Device
Saturated Inductor Protection
Detailed Safety Testing Analysis (Refer to Application
Safety Features
Note AND9064/D)
Non−latching, Over−Voltage Protection
Typical Applications
Brown−Out Detection
PC, TV, Adapters Power Supplies
Soft−Start for Smooth Start−up Operation (A version)
LED Drivers and Light Ballasts (including dimmable
Over Current Limitation
Disable Protection if the Feedback Pin is Not
Connected
versions)
All Off−Line Applications Requiring Power Factor
Correction
Thermal Shutdown
© Semiconductor Components Industries, LLC, 2015
January, 2015 − Rev. 4
1
Publication Order Number:
NCP1611/D

                    
                    






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