Startseite Energiemanagement AC/DC- und DC/DC-Wandler (integrierter FET)

UCC28911

AKTIV

700-V-Flyback-Schalter mit Konstantspannungs, Konstantstrom und primärseitiger Regelung

Produktdetails

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck, Flyback Iout (max) (A) 0.7 Vin (min) (V) 10 Vin (max) (V) 450 Switching frequency (min) (kHz) 0.42 Switching frequency (max) (kHz) 115 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 Vout (min) (V) 3.3 Vout (max) (V) 18 Iq (typ) (µA) 23500 Duty cycle (max) (%) 99
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck, Flyback Iout (max) (A) 0.7 Vin (min) (V) 10 Vin (max) (V) 450 Switching frequency (min) (kHz) 0.42 Switching frequency (max) (kHz) 115 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 Vout (min) (V) 3.3 Vout (max) (V) 18 Iq (typ) (µA) 23500 Duty cycle (max) (%) 99
SOIC (D) 7 29.4 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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Design und Entwicklung

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AC/DC- und DC/DC-Wandler (integrierter FET)
UCC28911 700-V-Flyback-Schalter mit Konstantspannungs, Konstantstrom und primärseitiger Regelung

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