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AC/DC & DC/DC controllers (external FET)

UCC28722

現行

適用於雙極電源產品且具有一次側穩壓功能的低成本 CVCC 返馳控制器

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產品規格表

UCC28722

現行
產品規格表 立即訂購

產品詳細資料

Operating temperature range (°C) -40 to 125 Control mode Primary-side regulation Topology Buck, Flyback Rating Catalog Duty cycle (max) (%) 99
Operating temperature range (°C) -40 to 125 Control mode Primary-side regulation Topology Buck, Flyback Rating Catalog Duty cycle (max) (%) 99
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • < 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
  • < 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

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.

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.
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類型 標題 日期
* Data sheet UCC28722 Constant-Voltage, Constant-Current Controller With Primary-Side Regulation, BJT Drive datasheet (Rev. B) PDF | HTML 2015年 10月 30日
Application note Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips PDF | HTML 2021年 8月 31日
Application note Common-Mode-Chokeless Bias Supply Reference Design Example 2020年 1月 2日
Application note Minimize Standby Consumption for UCC287XX Family 2019年 8月 1日
Application note Selecting Electrolitic Bus Capacitor for Universal Input 2018年 7月 17日
Application note Maximum Output Power and Thermal Considerations for UCC28720 and UCC28722 2017年 12月 6日
Application note AC-DC Non-Isolated SMPS for Single-Phase Smart Meters Based on UCC28722 (Rev. A) 2017年 11月 2日
Technical article Making smart meter eFuses robust and reliable PDF | HTML 2017年 6月 28日
Technical article Powering the IoT PDF | HTML 2017年 1月 26日
Application note Troubleshooting TI PSR controllers 2016年 10月 3日
Technical article Solving the biggest challenges when designing smart meter power supplies PDF | HTML 2016年 9月 6日
Application note UCC28722, Bias Supply Design Considerations for Intelligent eMeter Applications 2016年 8月 5日
Technical article Slim down your flyback; lose that excess snubber PDF | HTML 2016年 2月 15日
Application note Versatile Buck-Boost driver based on UCC28722 for 5W-9W LED Bulb 2015年 12月 8日
White paper Control Challenges for Low Power AC/DC Converters 2015年 10月 2日
White paper Control Challenges for Low Power AC/DC Converters (PPT) 2015年 10月 2日
Technical article Designing multiple output converters with primary side sensing PDF | HTML 2015年 8月 4日
Application note 5-W USB Flyback Design Example Using the UCC28722 2014年 1月 8日

設計與開發

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開發板

UCC28720EVM-212 — 適用於 USB 離線適配器的 UCC28720EVM-212 5W 評估模組

The UCC28720EVM-212 is a 5W evaluation module for evaluating an off line adapter for USB applications. It is intended for evaluation purposes and is not intended to be an end product. The UCC28720EVM-212 converters 100V to 240V RMS input voltage down to 5V DC, with a 1A current limit for USB (...)
使用指南: PDF
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模擬型號

UCC28722 Unencrypted PSpice Transient Model Package (Rev. A)

SLUM466A.ZIP (64 KB) - PSpice Model
下載
計算工具

SLUC528 — UCC28722 MathCad Design Tool

支援產品和硬體

支援產品和硬體

產品
AC/DC & DC/DC controllers (external FET)
UCC28720 — 具一次側調節的定電壓、定電流控制器，適合雙極電源裝置 UCC28722 — 適用於雙極電源產品且具有一次側穩壓功能的低成本 CVCC 返馳控制器
下載
計算工具

SLUC529 — UCC28722 Excel Design Tool

支援產品和硬體

支援產品和硬體

產品
AC/DC & DC/DC controllers (external FET)
UCC28720 — 具一次側調節的定電壓、定電流控制器，適合雙極電源裝置 UCC28722 — 適用於雙極電源產品且具有一次側穩壓功能的低成本 CVCC 返馳控制器
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