IC manufacturers Onsemi

IC manufacturers (99)

Onsemi NCP1611

Enhanced, High-Efficiency Power Factor Controller

Overview

TopologyPower Factor Correction
Input voltage90-264 V
Switching frequency20-50 kHz
Output 13.3 V / 0.1 A
Output 238 V / 1 A
IC revision4

Description

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 aminimum.

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 FrequencyOperation is Forced at Low Current Levels
  • On−time Modulation to Maintain a Proper Current Shaping in CCFFMode
  • Skip Mode Near the Line Zero Crossing
  • Fast Line / Load Transient Compensation (Dynamic ResponseEnhancer)
  • 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 VCCStart−up level (17.0 V)
  • Line Range Detection
  • Configurable for Low Harmonic Content across WideLine/Load Range
  • EN61000−3−2 Class C Compliant across Wide LoadRange for Dimmable Light Ballasts
  • This is a Pb−Free Device
  • Low Duty−Cycle Operation if the Bypass Diode isShorted
  • Open Ground Pin Fault Monitoring
  • Saturated Inductor Protection
  • Detailed Safety Testing Analysis (Refer to ApplicationNote AND9064/D)
  • 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

Typical applications

  • LED Drivers and Light Ballasts (including dimmable versions)
  • PC, TV, Adapters Power Supplies
  • All Off−Line Applications Requiring Power Factor Correction

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesISAT
(A)
fres
(MHz)
VersionApplicationInterface TypeTypeGenderPins (Value)
(pcs)
IR
(A)
Working Voltage
(V (AC))
PackagingIR
(A)
L
(µH)
RDC max.
(Ω)
VR
(V (AC))
VT
(V (AC))
MaterialL
(mm)
W
(mm)
H
(mm)
Mount Samples
7447462102SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-TI Radial Leaded Wire Wound Inductor 0.27 2.3 Heat Shrinking Tube 0.25 1000 6 6 6 8.5 THT
744821120SPEC
10 files Active i| Production is active. Expected lifetime: >10 years.WE-CMB Common Mode Power Line Choke THT 4 0.5 0.5 20000 1 250 1500 MnZn 15 7.8 17.5 THT
692221030100SPEC
6 files Active i| Production is active. Expected lifetime: >10 years.WR-COM USB 3.0 Type B Horizontal USB 3.0 Type B Horizontal Receptacle 9 1.8 30 Tray 1.8 THT
750341950SPEC
Active i| Production is active. Expected lifetime: >10 years. Flyback Transformer
Order Code Data­sheet Simu­lation
7447462102SPEC
744821120SPEC
692221030100SPEC
750341950SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesISAT
(A)
fres
(MHz)
VersionApplicationInterface TypeTypeGenderPins (Value)
(pcs)
IR
(A)
Working Voltage
(V (AC))
PackagingIR
(A)
L
(µH)
RDC max.
(Ω)
VR
(V (AC))
VT
(V (AC))
MaterialL
(mm)
W
(mm)
H
(mm)
Mount Samples