UCC28911 UCC28911 具有初级侧稳压和恒流控制功能的高电压反激开关 | 德州仪器 TI.com.cn

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UCC28911 具有初级侧稳压和恒流控制功能的高电压反激开关



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


  • 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

WEBENCH® Designer UCC28911

 AC  DC  
AC 频率  60 Hz  50 Hz
Use Isolated Output?
  最小   最大 范围
VinRMS  V 15.00 ç»™拟 305.00V
输出电压  V 3.3 ç»™拟 25V
输出电流  A ≤ 3.5A
环境温度  °C -40 ç»™拟 125°C


与其它产品相比 离线转换器 邮件 下载到电子表格中
Part number 立即下单 Control method Output power 85-265 Vac (Max) (W) Output power 175-265 Vac (Max) (W) Vin (Min) (V) Topology Duty cycle (Max) (%) Frequency (Max) (kHz) UVLO thresholds on/off (V) Operating temperature range (C) Package size: mm2:W x L (PKG)
UCC28911 立即下单 Current     10     12     30     Buck
99     115     9.5/6.5     -40 to 125     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)    
UCC28880 立即下单 Current     3     4     30     Buck     55     62     3.9/3.6     -40 to 125     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)    
UCC28881 立即下单 Current     4.5     6     30     Buck     55     62     3.9/3.6     -40 to 125     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)    
UCC28910 立即下单 Current     7.5     9.5     30     Buck
99     115     9.5/6.5     -40 to 125     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)