产品详细信息

Control mode Constant Current, Constant Voltage, Primary-side regulation Frequency (Max) (kHz) 115 UVLO thresholds on/off (V) 9.5/6.5 Duty cycle (Max) (%) 99 Features Light Load Efficiency, Current Limiting, Integrated Switch, Adjustable Switching Frequency, HV Start-up, Thermal Shutdown, Green Mode, Input Line Monitor, Leading Edge Blanking, Soft Start, IoT Compatible Operating temperature range (C) -40 to 125 Rating Catalog Device type Controllers Topology Buck, Flyback
Control mode Constant Current, Constant Voltage, Primary-side regulation Frequency (Max) (kHz) 115 UVLO thresholds on/off (V) 9.5/6.5 Duty cycle (Max) (%) 99 Features Light Load Efficiency, Current Limiting, Integrated Switch, Adjustable Switching Frequency, HV Start-up, Thermal Shutdown, Green Mode, Input Line Monitor, Leading Edge Blanking, Soft Start, IoT Compatible Operating temperature range (C) -40 to 125 Rating Catalog Device type Controllers Topology Buck, Flyback
SOIC (D) 7 29 mm² 4.9 x 6
  • Constant-Voltage (CV) and Constant-Current (CC) Output Regulation Without Optical-Coupler
  • ±5% Output Voltage Regulation Accuracy
  • ±5% Output Current Regulation With AC Line and Primary Inductance Tolerance Compensation
  • 700-V Start-Up and Smart Power Management Enables <30-mW Standby Power
  • 115-kHz Maximum Switching Frequency Design for High-Power Density
  • Valley Switching and Frequency Dithering to Ease EMI Compliance
  • Thermal Shut Down
  • Low Line and Output Over-Voltage Protection
  • Constant-Voltage (CV) and Constant-Current (CC) Output Regulation Without Optical-Coupler
  • ±5% Output Voltage Regulation Accuracy
  • ±5% Output Current Regulation With AC Line and Primary Inductance Tolerance Compensation
  • 700-V Start-Up and Smart Power Management Enables <30-mW Standby Power
  • 115-kHz Maximum Switching Frequency Design for High-Power Density
  • Valley Switching and Frequency Dithering to Ease EMI Compliance
  • Thermal Shut Down
  • Low Line and Output Over-Voltage Protection

The UCC28910 and UCC28911 are high-voltage flyback switchers that provide output voltageand current regulation without the use of an optical coupler. Both devices incorporate a 700-Vpower FET and a controller that process operating information from the flyback auxiliary windingand power FET to provide a precise output voltage and current control. The integrated high-voltage current source for startup that is switched off during device operation, and the controller current consumption is dynamically adjusted with load. Both enablethe very low stand-by power consumption.

Control algorithms in the UCC28910 and UCC28911, combining switching frequency and peakprimary current modulation, allow operating efficiencies to meet or exceed applicable standards.Discontinuous conduction mode (DCM) with valley switching is used to reduce switching losses.Built-in protection features help to keep secondary and primary component stress levels in check across the operating range. The frequency jitter helps to reduce EMI filter

The UCC28910 and UCC28911 are high-voltage flyback switchers that provide output voltageand current regulation without the use of an optical coupler. Both devices incorporate a 700-Vpower FET and a controller that process operating information from the flyback auxiliary windingand power FET to provide a precise output voltage and current control. The integrated high-voltage current source for startup that is switched off during device operation, and the controller current consumption is dynamically adjusted with load. Both enablethe very low stand-by power consumption.

Control algorithms in the UCC28910 and UCC28911, combining switching frequency and peakprimary current modulation, allow operating efficiencies to meet or exceed applicable standards.Discontinuous conduction mode (DCM) with valley switching is used to reduce switching losses.Built-in protection features help to keep secondary and primary component stress levels in check across the operating range. The frequency jitter helps to reduce EMI filter

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类型 项目标题 下载最新的英语版本 日期
* 数据表 UCC28910, UCC28911 High-Voltage Flyback Switcher with Primary-Side Regulation and Output Current Control 数据表 (Rev. D) PDF | HTML 19 Dec 2016
应用手册 PSR and SSR Flyback Aux Winding OVP and UVLO Fault Sensing Design tips and Troub PDF | HTML 31 Aug 2021
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白皮书 Control Challenges for Low Power AC/DC Converters 02 Oct 2015
白皮书 Control Challenges for Low Power AC/DC Converters (PPT) 02 Oct 2015
EVM 用户指南 Using the UCC28911EVM-718 06 Mar 2015

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评估板

UCC28911EVM-718 — UCC28911 评估模块

UCC28911EVM-718 评估模块是一种离线反激式电源,无需使用光耦合器和次级侧反馈组件即可提供隔离式输出电压和电流调节。支持的输入电压范围为 85VAC 至 265VAC、47Hz 至 64Hz。此评估模块使用 UCC28911 CV/CC PWM HV 开关。此器件集成了一个 700V 功率 MOSFET 和控制器,此控制器处理来自辅助反激式绕组以及功率 MOSFET 的运行信息,从而提供精准的输出电压与电流控制。UCC28911 中的控制算法使得运行效率符合甚至超过现行标准。较少的系统部件数和内置的高级保护功能使得此解决方案具有成本效益,并且能够满足全球范围内严格的能效要求。

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PMP4367 — 符合 Energy Star 6 效率等级的通用交流输入 6W 适配器

此 5V/1.2A 适配器解决方案经过全面测试,通过 EMI 和 EMC(CE、RE)安全要求。此方案实现了高效率初级侧控制器 UCC28910。此设计的效率符合 Energy Star 6,适用于小型外壳。此设计的尺寸为 36mmX30mmX15mm,具有良好的热性能。整个工作范围内的无负载效率小于 30mW。使用了低成本 EE16 变压器。
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UCC28911 Design Calculator (Rev. A)

SLUC624A.ZIP (91 KB)
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