Understanding the Basics of a Flyback Converter
Integrated features, increasing power density. The flyback topology is a popular choice for increasing efficiency in <150W power supplies. Our flyback controllers and converters help you meet compliance standards, especially in light- or no-load conditions, through such features as high-voltage startup, electromagnetic interference (EMI) dithering, and constant-current and constant-voltage charging support. Our portfolio ranges from devices with simple protection features to those with advanced control law.
Browse products by category
Flyback controllers
Flyback converters
Non-iso Fly-buck converters and flyback regulators
Related categories
Synchronous rectifier controllers
PFC controllers
USB Type-C® and USB Power Delivery ICs
Technical resources
Technical article
How an auxless GaN flyback converter can solve AC/DC adapter design challenges (Rev. A)
Explore how TI's integrated GaN flyback converter (UCG28826) can help you eliminate the use of the auxiliary winding for device bias (“auxless”) without sacrificing efficiency.
Application note
Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips
This application report describes how to avoid false overvoltage and undervoltage lockout faults caused by noise on the auxiliary winding.
Video series
Common Mistakes in Flyback Power Supplies and How to Fix Them
This five-part video series focuses on some of the most common mistakes in the design and troubleshooting of low-power AC/DC power supplies, specifically focusing on the flyback topology.
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
PRODUCTS
TECHNICAL RESOURCES
- Troubleshooting TI PSR controllers – Application note
- Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips – Application note
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
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
- Designing a Robust Traction Inverter Redundant Power Supply From 800 V Battery (Rev. C) – Application brief
- Minimize Standby Consumption for UCC287XX Family – Application note
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
PRODUCTS
TECHNICAL RESOURCES
- Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips – Application note
- Minimize Standby Consumption for UCC287XX Family – Application note
Design & development resources
Evaluation board
UCG28826 evaluation module
The UCG28826EVM-093 is a 65W USB-C® PD evaluation module (EVM) for evaluating an off-line GaN integrated quasi-resonant flyback adapter for AC/DC adapters, chargers, USB wall outlets, and other applications. The EVM meets CoC Tier two and DoE Level six efficiency requirements. The EVM is intended (...)
Evaluation board
UCC28750 evaluation module for current-mode flyback controller
The UCC28750EVM-071 is a 60-W evaluation module for evaluating an off-line AC to DC power converter. The UCC28750EVM-071 is intended for evaluation purposes and is not intended to be an end product. The UCC28750EVM-071 converts 85-VRMS to 265-VRMS input voltage down to 24 VDC, capable of delivering (...)
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.