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Применения > > Primary-Side Regulated Flyback with 85 to 265VAC Input (12V @ 0.5A) Reference Design

Primary-Side Regulated Flyback with 85 to 265VAC Input (12V @ 0.5A) Reference Design (PMP8787)

The PMP8787 reference design uses the UCC28700 flyback controller to generate a 12V/500mA output from a universal AC input. The primary-side regulation technique implemented by the UCC28700 eliminates the need for an opto coupler, reducing the size and cost of the design. In addition, the valley switching of the UCC28700 allows this design to achieve a maximum load efficiency over 80%; no load losses are less than 40mW. The circuit board measures only 28mm by 33mm, with a maximum height below 20mm.

Возможности

Primary Side Regulation (no optocoupler) Standby (no load) power consumption is less than 40mW Conducted emissions are below Class B levels Compact form factor 28mm X 33mm X 20mm

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Primary-Side Regulated Flyback with 85 to 265VAC Input (12V @ 0.5A) Reference Design PMP8787

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