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In flyback converters, flyback transformers are utilised to provide voltage transformation and circuit isolation.
The most popular option for low-cost, high-efficiency isolated power supply solutions up to about 120 Watts is a flyback transformer.
The term “flyback” refers to the MOSFET switch’s abrupt on/off and stop/start actions, which produce a waveform that appears to show a sudden reversal of current flow. By changing the primary-side switch’s on/off duty cycle, the output can be controlled.
The Global Flyback controllers market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
UCC28781 Zero-Voltage-Switching Flyback Controller with Dedicated Synchronous Rectifier Gate-Drive is from Texas Instruments.
To reduce transformer size and enable high power density, the UCC28781 is a zero-voltage-switching (ZVS) controller that may be employed at very high switching frequencies.
In order to enhance efficiency and streamline design, direct synchronous rectifier (SR) control eliminates the need for a separate SR controller and allows the controller to drive the SR FET directly. (An isolated gate-driver IC is needed for isolated applications.)
Switching losses and EMI are reduced for ZVS using adaptive dead-time control. Through the whole operating range, this design produces a controller with incredibly high conversion efficiency.
When entering and leaving standby mode, the controller can be flexible thanks to the programmable adaptive burst mode (ABM), which helps to maximise standby power in low- and no-load situations.
Additionally, ABM aids in minimising audible noise and ripple. Multiple protection options with automated restart (retry) replies are available from the controller.
