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Flyback & flybuck

Achieve enhanced efficiency, low EMI and low standby power

 Integrated features, increasing power density

Our flyback solutions allow you to design smaller power supplies with higher efficiency. With our years of experience we are able to provide reliable and innovative products. Our integrated features like high-voltage startup, EMI dithering, variable frequency and more enable simple power supply design while improving efficiency and increasing power density.  From consumer electronics to automotive applications and everything in between, we have a flyback solution that meets your needs.

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Offline AC/DC flyback controllers

Select from our wide range of controllers which drive external field-effect transistors

Offline AC-DC flyback converters

Integrated field-effect transistor (FET) configurable as a flyback or a high-voltage buck converter

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Non-isolated flyback and flybuck controllers

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Design & development resources

Evaluation board
UCC28782 active clamp flyback converter 65-W USB-C PD EVM with LMG2610 integrated GaN half-bridge

UCC28782EVM-030 demonstrates high-efficiency and high-density for a 65-W USB Type-C™ power delivery (PD) off-line adapter using the UCC28782 active-clamp flyback controller.  The input supports a universal 90 Vac to 264 Vac and the single output can be set to 5 V, 9 V and 15 V all at 3-A (...)
Reference design
Automotive 40-V to 1-kV input flyback reference design supporting regenerative braking test
This power supply reference design for automotive auxiliary circuits generates a 15-V, 4-A output from a wide input range of 40 V to 1 kV and up to a 1.2-kV transient. The design fits ideally into an 800-V batterydriven hybrid-electric vehicle (HEV) or electric vehicle(EV) traction inverter (...)
Calculation tool
Fly-Buck and Flyback Topology Selector

This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.

Discover featured applications

Appliances
Reduce solution size and standby power while maximizing efficiency in appliance applications with our flyback controllers
HEV/EV inverters
Support wide-input-voltage hybrid electric vehicle (HEV)/EV inverter applications with our flyback controllers
Grid infrastructure
Minimize solution size while maximizing efficiency with our flyback controllers

Reduce solution size and standby power while maximizing efficiency in appliance applications with our flyback controllers

Our flyback controllers and converters help achieve high power density and efficiency in appliance applications, while also passing electromagnetic interference (EMI) compliance tests.

Benefits:

  • Valley switching to reduce switching losses and minimize current spikes when turning on the metal-oxide semiconductor field-effect transistor.
  • Frequency dithering to reduce EMI filter costs and measured EMI noise.
  • Isolated (flyback) and nonisolated (buck) topologies.
  • FET-integrated features to further reduce external components, simplify power-supply designs and increase power density.

Featured resources

END-EQUIPMENT / SUB-SYSTEM
REFERENCE DESIGNS
  • PMP10767 – AC/DC Auxiliary Supply Reference Design Using UCC28911
  • PMP30605 – Universal input to 12 V at 1-A isolated flyback reference design
  • PMP30032 – Universal Input to 12V@500mA PSR Isolated Flyback with Integrated 700V Switch Reference Design
PRODUCTS
  • UCC28911 – 700V Flyback switcher with constant-voltage constant-current and primary-side regulation
  • UCC28600 – 8-pin quasi resonant Flyback green mode controller
TECHNICAL RESOURCES

Support wide-input-voltage hybrid electric vehicle (HEV)/EV inverter applications with our flyback controllers

Our primary-side-regulated flyback controllers include a redundant power supply that operates directly off of a high-voltage battery supply.

Benefits:

  • A 700-V internal startup switch supports rail generation from low- and high-voltage batteries.
  • 5-mW standby power extends high-voltage battery life and reduces overall power consumption.

Featured resources

END-EQUIPMENT / SUB-SYSTEM
REFERENCE DESIGNS
  • PMP22288 – 15-W flyback reference design for automotive inverter power
  • PMP22557 – High voltage buck converter reference design for E-motorcycle BMS applications
  • PMP22487 – High voltage buck converter reference design for BMS applications
PRODUCTS
  • UCC28730-Q1 – Zero-power standby PSR flyback controller for automotive
  • UCC28700-Q1 – Compact primary-side regulation PWM controller with automotive grade
  • LM5021-Q1 – Automotive 30V, 1MHz current mode PWM controller
TECHNICAL RESOURCES

Minimize solution size while maximizing efficiency with our flyback controllers

Our low-cost, high-efficiency flyback controllers enable high power density in grid infrastructures, even those in harsh environments.

Benefits:

  • Valley switching to reduce switching losses and provide up to 1% output regulation accuracy.
  • Support for wide input-voltage-range designs (with a  700-V internal startup switch) to address different application needs, reduce the number of external components, and increase power density.
  • Isolated (flyback) and nonisolated (buck) topologies.

Featured resources

END-EQUIPMENT / SUB-SYSTEM
REFERENCE DESIGNS
  • PMP21783 – 60-W, Ultra-wide range power supply reference design
  • PMP8583 – Universal Input to 12.2V @ 500mA Non-Isolated Quasi-Resonant Flyback Reference Design
PRODUCTS
  • UCC28740 – Constant-Voltage, Constant-Current (CVCC) Flyback controller with Secondary Side Regulation (SSR)
  • UCC28742 – High-Efficiency Flyback Controller with 1% Output regulation accuracy
  • UCC28911 – 700V Flyback switcher with constant-voltage constant-current and primary-side regulation
TECHNICAL RESOURCES

Technical resources

Video
Video
Understanding flyback basics
Watch this helpful video to learn the basics of a flyback converter.
White paper
White paper
Power Through the Isolation Barrier: The Landscape of Isolated DC/DC Bias Power (Rev. A)
This paper examines various isolated DC/DC bias power supplies to move signals and power across the isolation barrier.
document-pdfAcrobat PDF
Application note
Application note
Troubleshooting TI PSR controllers
This application note helps you understand how to resolve common design challenges with DCM flyback controllers.
document-pdfAcrobat PDF