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AC/DC Flyback In applications where a stable, isolated supply voltage must be produced from the AC line voltage, controllers are employed. First, a high DC voltage is created by rectifying the AC line voltage. The Flyback supply operates similarly to a single switch buck-boost in which a transformer is created by severing the inductor.
A transformer is used in a flyback power supply to store energy from the main winding and transmit it to the secondary winding. Given that transformers are typically used to step up or down voltage, this is a novel application of transformers in power supply design.
The Global Flyback Controller IC 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.
To reduce transformer size and enable high power density, the UCC28781-Q1 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.
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