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NCP1611: Power Factor Controller, Enhanced, High Efficiency

Datasheet: Enhanced, High Efficiency Power Factor Controller
Rev. 4 (807kB)
Product Overview
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»View Material Composition
» Product Change Notification
The NCP1611 is active power factor corrected (PFC) controller specifically designed for use as a boost preconverter in ac-dc adapters, flat TVs, lighting ballasts and other medium powered offline applications. The controller is based on an innovative Current Controlled Frequency Foldback(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 reduces the frequency down to about 20 kHz when the current is at a null. CCFF maximizes the efficiency at both nominal and light load. In particular, the standby losses are reduced to a minimum. The controller features a robust suite of protection features to properly handle an array of power supply operating and fault conditions.
Features   Benefits
     
  • Critical Conduction mode with current controlled frequency foldback
 
  • Optimizes conversion efficiency across load range
  • Dynamic Response Enhancer
 
  • Improved transient response for line and load steps
  • Soft Overvoltage Protection (S-OVP)
 
  • Reduces accoustic noise and stress in the even of an overvoltage fault
  • -500 mA/+800 mA Drive Capability
 
  • High drive to support wide range of FETS and power levels
  • Valley Turn On
 
  • Improved efficiency and reduced EMI generation
  • Wide Vcc Range of 9.5-35V
 
  • Easy to Bias even at light load and high line conditions
  • Two Vcc Startup Versions: 10.5V (A) and 17V (B)
 
  • B version allows smaller Vcc capacitor and faster startup in self biased applications
  • AC Line Brownout Detection
 
  • Protect boost stage from fault conditions
  • Saturated Inductor and shorted boost or bypass protection
 
  • Enhances safe operating monitoring without extra components
  • Open Pin Protection including Ground
 
  • Enhanced fault handling
  • Undervoltage and Fast Over voltage protection
 
  • Robust safety handling
  • Near Unity Power Factor
   
  • Cycle-by-cycle current protection
   
Applications   End Products
  • Offline Power Supplies
  • Lighting Ballasts
 
  • Flat TVs
  • All-in-one Computers
  • High Powered Adapters
  • LED Lighting Power Supplies and Drivers
  • Dimmable Fluorescent Ballasts
  • LED Lighting
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
NCP1611GEVB Active
Pb-free
160 W Low Profile PFC Evaluation Board
Availability & Samples
Specifications
Case Outlines
Application Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCP1611ADR2G Active
Pb-free
Halide free
NCP1611, with 10.5 V Startup (typ) SOIC-8 751-07 2 260 Tape and Reel 2500 $0.3067
NCP1611BDR2G Active
Pb-free
Halide free
NCP1611, with 17 V Startup (typ) SOIC-8 751-07 2 260 Tape and Reel 2500 $0.3067
Market Leadtime (weeks) : 17 to 20
Market Leadtime (weeks) : 8 to 12

Product
Description
Pricing ($/Unit)
Compliance
Status
PFC Mode
Frequency Operation
Control Mode
Topology
fSW Typ (kHz)
VCC Max (V)
Drive Cap. (mA)
UVLO (V)
Latch
UVP
Inhibition
Package Type
NCP1611ADR2G  
 $0.3067 
Pb
H
 Active   
CRM
Variable
Current Mode
Step-Up
Variable
35
500 / 800
9
No
Yes
Yes
SOIC-8
NCP1611BDR2G  
 $0.3067 
Pb
H
 Active   
CRM
Variable
Current Mode
Step-Up
Variable
35
500 / 800
9
No
Yes
Yes
SOIC-8
Case Outlines
751-07   
Packages
NCP1611: Power Factor Controller, Enhanced, High Efficiency
NCP1611: Power Factor Controller, Enhanced, High Efficiency
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Featured Video
Power Factor Control Solutions with the NCP1611GEVB Evaluation Board
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