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UCC28910

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700V Flyback switcher with constant-voltage constant-current and primary-side control

Product details

Control mode Current, Primary-side regulation, Voltage UVLO thresholds on/off (V) 9.5/6.5 Duty cycle (max) (%) 99 Switching frequency (max) (kHz) 115 Features Current limiting, Green mode, High voltage startup, High-voltage startup, Input line monitor, Integrated Switch, Leading edge blanking, Light load efficiency, Light-load efficiency, Low power, Overcurrent protection, Soft start Operating temperature range (°C) -40 to 125 Rating Catalog Device type Controllers Topology Buck, Flyback
Control mode Current, Primary-side regulation, Voltage UVLO thresholds on/off (V) 9.5/6.5 Duty cycle (max) (%) 99 Switching frequency (max) (kHz) 115 Features Current limiting, Green mode, High voltage startup, High-voltage startup, Input line monitor, Integrated Switch, Leading edge blanking, Light load efficiency, Light-load efficiency, Low power, Overcurrent protection, Soft start Operating temperature range (°C) -40 to 125 Rating Catalog Device type Controllers Topology Buck, Flyback
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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Evaluation board

UCC28910FBEVM-526 — UCC28910FBEVM-526 Evaluation Module

Universal input 5V, 6W isolated flyback power supply with primary side control

User guide: PDF
Not available on TI.com
Evaluation board

UCC28911EVM-718 — UCC28911 Evaluation Module

The UCC28911EVM-718 evaluation module is an offline Flyback power supply that provides isolated output voltage and current regulation without the use of an optocoupler and secondary-side feedback components. The input accepts a voltage range of 85VAC to 265VAC, 47Hz to 64Hz. The evaluation module (...)

User guide: PDF
Not available on TI.com
Support software

PMP4367 — Universal AC Input 6W Adapter with Energy Star 6 Efficiency Rating

This 5V / 1.2A adapter solution is fully test and passes EMI and EMC (CE,RE) safety requirements. It implements a high efficiency primary side controller UCC28910. The efficiency of the design complies with Energy Star 6 and is designed to fit into small form factor housing. The design measures (...)
Calculation tool

SLUC503 UCC28910 Design Calculator

Supported products & hardware

Supported products & hardware

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Flyback controllers
UCC28910 700V Flyback switcher with constant-voltage constant-current and primary-side control

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