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UCC28910

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

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Data sheet

UCC28910

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck, Flyback Iout (max) (A) 0.6 Vin (min) (V) 20 Vin (max) (V) 450 Switching frequency (min) (kHz) 0.42 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 Control mode Current, Primary-side regulation, Voltage Vout (min) (V) 3.3 Vout (max) (V) 24 Iq (typ) (µA) 23500 Duty cycle (max) (%) 99
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck, Flyback Iout (max) (A) 0.6 Vin (min) (V) 20 Vin (max) (V) 450 Switching frequency (min) (kHz) 0.42 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 Control mode Current, Primary-side regulation, Voltage Vout (min) (V) 3.3 Vout (max) (V) 24 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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Technical documentation

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* Data sheet UCC28910, UCC28911 High-Voltage Flyback Switcher with Primary-Side Regulation and Output Current Control datasheet (Rev. D) PDF | HTML 19 Dec 2016
Technical article 업사이드 다운 벅이 비절연 플라이백을 대체하는 토폴로지를 제공하 는 방식 PDF | HTML 22 Mar 2024
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Technical article How an upside-down buck offers a topology alternative to the non-isolated flyback PDF | HTML 26 Feb 2024
Application note Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips PDF | HTML 31 Aug 2021
Technical article Overcoming common design challenges in an UV sterilization box system PDF | HTML 27 Jul 2020
White paper Power Electronics in Motor Drives: Where is it? (Rev. A) 01 Oct 2019
Test report PMP21384: Universal AC Input Integrated FET Buck Converter Reference Design 19 Jun 2018
Technical article Making a solar inverter more reliable than the sun PDF | HTML 01 Aug 2017
Technical article Powering the IoT PDF | HTML 26 Jan 2017
Application note Troubleshooting TI PSR controllers 03 Oct 2016
Design guide Wi-Fi Enabled Level 1 Level 2 Electric Vehicle Service Equipment Design Guide 16 Aug 2016
Application note Non-Isolated High-Side Buck Converter With UCC28910 01 Jun 2016
White paper Redefining power management through high-voltage innovation 12 Nov 2015
White paper Control Challenges for Low Power AC/DC Converters 02 Oct 2015
White paper Control Challenges for Low Power AC/DC Converters (PPT) 02 Oct 2015
Technical article Designing multiple output converters with primary side sensing PDF | HTML 04 Aug 2015
EVM User's guide Using the UCC28910 EVM-526 (Rev. A) 08 Aug 2013

Design & development

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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 (...)
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SLUC503 — UCC28910 Design Calculator

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AC/DC & DC/DC converters (integrated FET)
UCC28910 — 700V Flyback switcher with constant-voltage constant-current and primary-side control
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