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AC/DC 轉換器

UCC28911

現行

具有定電壓、定電流及一次側穩壓功能的 700V 返馳切換器

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產品規格表

UCC28911

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck, Flyback Iout (max) (A) 0.7 Vin (max) (V) 450 Vin (min) (V) 10 Vout (max) (V) 18 Vout (min) (V) 3.3 Features Adjustable switching frequency, Current limiting, Green mode, High voltage startup, High-voltage startup, Input line monitor, Integrated Switch, IoT compatible, Leading edge blanking, Light load efficiency, Light-load efficiency, Overcurrent protection, Overtemperature protection, Soft start, Thermal shutdown Control mode Current, Primary-side regulation, Voltage Switching frequency (min) (kHz) 0.42 Switching frequency (max) (kHz) 115 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 23500 Duty cycle (max) (%) 99
Rating Catalog Topology Buck, Flyback Iout (max) (A) 0.7 Vin (max) (V) 450 Vin (min) (V) 10 Vout (max) (V) 18 Vout (min) (V) 3.3 Features Adjustable switching frequency, Current limiting, Green mode, High voltage startup, High-voltage startup, Input line monitor, Integrated Switch, IoT compatible, Leading edge blanking, Light load efficiency, Light-load efficiency, Overcurrent protection, Overtemperature protection, Soft start, Thermal shutdown Control mode Current, Primary-side regulation, Voltage Switching frequency (min) (kHz) 0.42 Switching frequency (max) (kHz) 115 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 23500 Duty cycle (max) (%) 99
SOIC (D) 7 29.4 mm² (4.9 mm × 6 mm)
  • 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 voltage and current regulation without the use of an optical coupler. Both devices incorporate a 700-V power FET and a controller that process operating information from the flyback auxiliary winding and 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 enable the very low stand-by power consumption.

Control algorithms in the UCC28910 and UCC28911, combining switching frequency and peak primary 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 voltage and current regulation without the use of an optical coupler. Both devices incorporate a 700-V power FET and a controller that process operating information from the flyback auxiliary winding and 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 enable the very low stand-by power consumption.

Control algorithms in the UCC28910 and UCC28911, combining switching frequency and peak primary 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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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 UCC28910, UCC28911 High-Voltage Flyback Switcher with Primary-Side Regulation and Output Current Control datasheet (Rev. D) PDF | HTML 2016/12/19
應用說明 Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips PDF | HTML 2021/8/31
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白皮書 Control Challenges for Low Power AC/DC Converters 2015/10/2
白皮書 Control Challenges for Low Power AC/DC Converters (PPT) 2015/10/2
技術文章 Designing multiple output converters with primary side sensing PDF | HTML 2015/8/4

設計與開發

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開發板

UCC28911EVM-718 — UCC28911 評估模組

UCC28911EVM-718 評估模組是一款離線返馳式電源供應器，可提供隔離式輸出電壓和電流穩壓，無需使用光耦合器和二次側回饋元件。輸入電壓範圍為 85VAC 至 265VAC，頻率範圍為47Hz 至 64Hz。評估模組使用 UCC28911 CV/CC PWM HV 切換器。此裝置整合 700 V 功率 MOSFET 和控制器，可處理來自輔助返馳式繞組和功率 MOSFET 的運作資訊，提供精密的輸出電壓和電流控制。UCC28911 中的控制算法使操作效率達到或超過適用標準。低系統零件數量和內置高級保護功能可帶來經濟高效的解決方案，滿足全球嚴格的能效要求。

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