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NCP1937: Combination Power Factor Correction & Quasi-Resonant Flyback Controller

Overview
Specifications
Datasheet: Combo PFC & QR Flyback Controller
Rev. 4 (964kB)
Product Overview
»信頼性データを表示する
»材料組成を表示
»No Product Change Notifications exist
This combination IC integrates power factor correction (PFC) and quasi-resonant flyback functionality necessary to implement a compact and highly efficient Switched Mode Power Supply for an adapter application.

The PFC stage exhibits near-unity power factor while operating in a Critical Conduction Mode (CrM) with a maximum frequency clamp. The circuit incorporates all the features necessary for building a robust and compact PFC stage while minimizing the number of external components.

The quasi-resonant current-mode flyback stage features a proprietary valley-lockout circuitry, ensuring stable valley switching. This system works down to the 4th valley and toggles to a frequency foldback mode with a minimum frequency clamp beyond the 4th valley to eliminate audible noise. Skip mode operation allows excellent efficiency in light load conditions while consuming very low standby power consumption.

特長   利点
     
  • <10mW No Load Standby Performance
 
  • Lowest no load performance
  • High Voltage Startup Circuit and Active Input Filter Capacitor Discharge Circuitry
 
  • Eliminates the need for an external HV startup circuit and X2 resistors.
  • High Voltage Line Voltage Detector
 
  • Optimize performance based on 110 v or 220 V ac mains
  • Integrated High Voltage Switch Disconnects PFC Feedback Resistor Divider
 
  • Reduces no load standby power
  • Fault Input for Severe Fault Conditions
 
  • Enhanced protection capability
  • Bi-Level Line-Dependent Output Voltage
 
  • Optimized system with different input voltages
  • Boost Diode Short-Circuit Protection
 
  • Enhanced protection features
  • Adjustable PFC Disable Threshold Based on Output Power
 
  • Optimized system to improve efficiency
  • Frequency Foldback with Minimum Frequency Clamp
 
  • Enhanced efficiency at light and no load
  • Minimum Frequency Clamp
 
  • Eliminates audible noise
  • Valley Switching Operation with Valley-Lockout
 
  • Noise free operation
  • PFC
   
  • QR Flyback Controller
   
アプリケーション   最終製品
  • Adapters
  • Combo PFC+QR
 
  • All-In-One (AIO) Computers
  • High Power Notebook Adapters
評価/開発ツール情報
製品 状態 Compliance 簡単な説明 アクション
NCP1937BADAPGEVB Active
Pb-free
90 W Adapter PFC+QR 10 MW Evaluation Board
Mouser (2016-12-08) : 2
Digikey (2016-12-08) : 1
供給状況 & サンプル
製品
状態
Compliance
内容
外形
MSL*
梱包形態
予算 価格/Unit
タイプ
Case Outline
タイプ
数量
NCP1937A1DR2G Active
Pb-free
Halide free
Combination Power Factor Correction & Quasi-Resonant Flyback Controller SOIC-20 NB 751BS 1 Tape and Reel 2500 $0.6
NCP1937A2DR2G Active
Pb-free
Halide free
Combination Power Factor Correction & Quasi-Resonant Flyback Controller SOIC-20 NB 751BS 1 Tape and Reel 2500 $0.6
NCP1937A3DR2G Active
Pb-free
Halide free
Combination Power Factor Correction & Quasi-Resonant Flyback Controller SOIC-20 NB 751BS 1 Tape and Reel 2500 $0.6
NCP1937B1DR2G Active
Pb-free
Halide free
Combination Power Factor Correction & Quasi-Resonant Flyback Controller SOIC-20 NB 751BS 1 Tape and Reel 2500 $0.6
NCP1937B2DR2G Active
Pb-free
Halide free
Combination Power Factor Correction & Quasi-Resonant Flyback Controller SOIC-20 NB 751BS 1 Tape and Reel 2500 $0.6
NCP1937B3DR2G Active
Pb-free
Halide free
Combination Power Factor Correction & Quasi-Resonant Flyback Controller SOIC-20 NB 751BS 1 Tape and Reel 2500 $0.6
NCP1937C1DR2G Active
Pb-free
Halide free
Combination Power Factor Correction & Quasi-Resonant Flyback Controller SOIC-20 NB 751BS 1 Tape and Reel 2500 $0.6
NCP1937C4DR2G Active
Pb-free
Halide free
Combination Power Factor Correction & Quasi-Resonant Flyback Controller SOIC-20 NB 751BS 1 Tape and Reel 2500 $0.6
NCP1937C61DR2G Active
Pb-free
Halide free
Combination Power Factor Correction & Quasi-Resonant Flyback Controller SOIC-20 NB 751BS 1 Tape and Reel 2500 $0.6
面実装デバイスためのモイスチャー・レベル(260°Cリフローでの鉛フリー測定、235°Cリフローでの鉛フリー以外測定)
マーケットリードタイム(週) : 4 to 8
マーケットリードタイム(週) : 2 to 4
マーケットリードタイム(週) : 4 to 8
マーケットリードタイム(週) : 4 to 8
Mouser   (2016-12-08) : >1K
マーケットリードタイム(週) : 4 to 8
マーケットリードタイム(週) : 4 to 8
マーケットリードタイム(週) : 4 to 8
マーケットリードタイム(週) : 4 to 8
マーケットリードタイム(週) : 4 to 8
Datasheet: Combo PFC & QR Flyback Controller
Rev. 4 (964kB)
Product Overview
»信頼性データを表示する
»材料組成を表示
»No Product Change Notifications exist

Product Compliance Status Description PFC Mode Frequency Operation Control Mode Topology fSW Typ (kHz) VCC Max (V) Drive Cap. (mA) UVLO (V) Latch UVP Inhibition Package Type
Pb-free
Halide free
 Active     Combination Power Factor Correction & Quasi-Resonant Flyback Controller 
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
Yes
Yes
Yes
SOIC-20 NB
Pb-free
Halide free
 Active     Combination Power Factor Correction & Quasi-Resonant Flyback Controller 
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
     
SOIC-20 NB
Pb-free
Halide free
 Active     Combination Power Factor Correction & Quasi-Resonant Flyback Controller 
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
     
SOIC-20 NB
Pb-free
Halide free
 Active     Combination Power Factor Correction & Quasi-Resonant Flyback Controller 
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
Yes
Yes
Yes
SOIC-20 NB
Pb-free
Halide free
 Active     Combination Power Factor Correction & Quasi-Resonant Flyback Controller 
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
     
SOIC-20 NB
Pb-free
Halide free
 Active     Combination Power Factor Correction & Quasi-Resonant Flyback Controller 
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
     
SOIC-20 NB
Pb-free
Halide free
 Active     Combination Power Factor Correction & Quasi-Resonant Flyback Controller 
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
Yes
Yes
Yes
SOIC-20 NB
Pb-free
Halide free
 Active     Combination Power Factor Correction & Quasi-Resonant Flyback Controller 
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
     
SOIC-20 NB
Pb-free
Halide free
 Active     Combination Power Factor Correction & Quasi-Resonant Flyback Controller 
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
     
SOIC-20 NB
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