UCC28722 1 次側レギュレーション付き、定電圧、定電流コントローラ | TIJ.co.jp

UCC28722
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1 次側レギュレーション付き、定電圧、定電流コントローラ

 

概要

The UCC28722 flyback power supply controller provides isolated-output constant-voltage (CV) and constant-current (CC) output regulation without the use of an optical coupler. The device processes information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current.

Dynamically-controlled operating states and a tailored modulation profile support high-efficiency operation at all load levels without sacrificing output transient response.

Control algorithms in the UCC28722 device allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a bipolar transistor power switch, enabling lower-cost converter design. Discontinuous conduction mode (DCM) with valley switching reduces switching losses, while modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The controller has a maximum switching frequency of 80 kHz and always maintains control of the peak-primary current in the transformer. Output overvoltage and overcurrent as well as input undervoltage protection features help keep primary and secondary component stresses in check. The UCC28722 also allows compensation for voltage drop in the cable to be programmed with an external resistor.

特長

  • < 50-mW No-Load Power
  • Primary-Side Regulation (PSR) Eliminates Opto-
    Coupler
  • Dynamic BJT Drive
  • ± 5% Voltage and Current Regulation Across Line
    and Load
  • 80-kHz Maximum Switching Frequency Enables
    High-Power Density Charger Designs
  • Quasi-Resonant Valley-Switching Operation for
    Highest Overall Efficiency
  • Wide VDD Range Allows Small Bias Capacitor
  • Output Overvoltage, Low-Line, and Overcurrent
    Protection Functions
  • Programmable Cable Compensation
  • SOT23-6 Package

WEBENCH® Designer UCC28722

 AC  DC  
AC 周波数  60 Hz  50 Hz
Use Isolated Output?
  最小   最大 範囲
VinRMS  V 85.00 − 480.00V
出力電圧  V 3.3 − 25V
負荷電流  A ≤ 10A
周囲温度  °C -40 − 125°C

機能一覧

他の製品と比較 フライバック・コントローラ メール Excelへダウンロード
Part number オーダー・オプション Control method Duty cycle (Max) (%) Frequency (Max) (kHz) UVLO thresholds on/off (V) Features Operating temperature range (C) Package Group Rating Package size: mm2:W x L (PKG)
UCC28722 ご注文 Primary-side regulation     99     80     21/7.7     PSR
DCM    
-40 to 125     SOT-23 | 6     Catalog     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
UCC28700 ご注文 Primary-side regulation     99     132     21/8.1     PSR
DCM    
-20 to 125     SOT-23 | 6     Catalog     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
UCC28701 ご注文 Primary-side regulation     99     132     21/8.1     PSR
DCM    
-20 to 125     SOT-23 | 6     Catalog     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
UCC28702 ご注文 Primary-side regulation     99     132     21/8.1     PSR
DCM    
-20 to 125     SOT-23 | 6     Catalog     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
UCC28703 ご注文 Primary-side regulation     99     132     21/8.1     PSR
DCM    
-20 to 125     SOT-23 | 6     Catalog     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
UCC28704 ご注文 Primary-side regulation     99     85     21/7.7     PSR
DCM    
-40 to 125     SOT-23 | 6     Catalog     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
UCC28710 ご注文 Primary-side regulation     99     100     21/8     PSR
DCM
HV Start-up
Green Mode
Input Line Monitor
Leading Edge Blanking
Light Load Efficiency
Low Power
Soft Start    
-40 to 125     SOIC | 7     Catalog     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)    
UCC28711 ご注文 Primary-side regulation     99     100     21/8     PSR
DCM
HV Start-up
Green Mode
Input Line Monitor
Leading Edge Blanking
Light Load Efficiency
Low Power
Soft Start    
-40 to 125     SOIC | 7     Catalog     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)    
UCC28720 ご注文 Primary-side regulation     99     80     21/7.7     PSR
DCM
HV Start-up
Current Limiting
Green Mode
HV Start-up
Input Line Monitor
Leading Edge Blanking
Light Load Efficiency
Low Power
Soft Start    
-40 to 125     SOIC | 7     Catalog     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)    
UCC28740