NCP1612: Power Factor Controller, Enhanced, High Efficiency

Datasheet: Enhanced, High-Efficiency Power Factor Controller
Rev. 11 (1951kB)
Product Overview
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Product Change Notification
The NCP1612 is active power factor corrected (PFC) controller specifically designed for use as a boost pre-converter 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 NCP1612 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. This device is particularly suited a PFC stage for LLC controllers due to its dedicated PFC_Okay Output.
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
 
  • Reduces accoustic noise and stress in the event of an overvoltage fault
  • -500 mA/+800 mA Drive Capability
 
  • Supports wide range of MOSFETs and power levels
  • Valley turn on
 
  • Improved efficiency amd reduced EMI generation
  • Wide Vcc Range of 9.5-35 Vdc
 
  • Easy to bias even under light load or high line conditions
  • Two Vcc startup versions: 10.5 V (A) and 17 V (B)
 
  • B version allows smaller Vcc capacitor and faster startup in self biased applications
  • AC Line Brownout Detection
 
  • Protects boost stage power components during line fault conditions
  • Cycle-by-cycle switch current monitoring
 
  • Enhances system robustness
  • Saturated inductor and shorted boost or bypass diode detection
 
  • Enhanced safety monitoring without extra components
  • PFC Okay Output
 
  • Can enable downstream controller of stable PFC rail
  • Latch Off Input
 
  • Simplifies implemented latch protection for power supply
  • Independent bulk overvoltage and undervoltage monitoring
 
  • Increased system reliablity
  • Open Ground Pin Fault Monitoring
 
  • Simplifies safety testing
  • Near Unity Power Factor
   
  • Thermal Shutdown
   
Applications   End Products
  • Offline Power Supplies
  • Lighting Ballasts
  • LED Lighting Drivers and Power Supplies
 
  • Flat TV
  • All-In-One Computers
  • High Powered Adapters
  • LED Lighting
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
NCP1612GEVB Active
Pb-free
160 W Low Profile PFC Evaluation Board
Availability & Samples
Specifications
Case Outlines
Application Diagram
Interactive Block Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCP1612A1DR2G Active
Pb-free
Halide free
NCP1612, VBUV 1V SOIC-10 NB 751BQ 1 260 Tape and Reel 2500 $0.3335
NCP1612A2DR2G Last Shipments
Pb-free
Halide free
NCP1612, UVP2 if VFOVP SOIC-10 NB 751BQ 1 260 Tape and Reel 2500  
NCP1612A3DR2G Active
Pb-free
Halide free
NCP1612, VBUV 1V SOIC-10 NB 751BQ 1 260 Tape and Reel 2500 $0.4419
NCP1612ADR2G Active
Pb-free
Halide free
NCP1612, and 10.5 V Startup Level SOIC-10 NB 751BQ 1 260 Tape and Reel 2500 $0.3335
NCP1612BDR2G Last Shipments
Pb-free
Halide free
NCP1612, and 17 V Startup Level SOIC-10 NB 751BQ 1 260 Tape and Reel 2500  
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory

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
NCP1612A1DR2G  
 $0.3335 
Pb
H
 Active   
CRM
DCM
Variable
Current Mode
Step-Up
Variable
35
500 / 800
9
Yes
Yes
Yes
SOIC-10 NB
NCP1612A3DR2G  
 $0.4419 
Pb
H
 Active   
CRM
DCM
Fixed
Current Mode
Step-Up
Variable
35
500 / 800
9
Yes
Yes
Yes
SOIC-10 NB
NCP1612ADR2G  
 $0.3335 
Pb
H
 Active   
CRM
DCM
Variable
Current Mode
Step-Up
Variable
35
500 / 800
9
Yes
Yes
Yes
SOIC-10 NB
Case Outlines
751BQ   
Packages
NCP1612: Power Factor Controller, Enhanced, High Efficiency
NCP1612: Power Factor Controller, Enhanced, High Efficiency
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Featured Video
Power Factor Control Solutions with the NCP1612GEVB Evaluation Board
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