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Flyback converter uses no optocoupler feedback

Posted: 21 Jul 2011     Print Version  Bookmark and Share

Keywords:flyback  powered device  PoE 

Here's a reference design for a flyback, 12V, Class 3 powered device (PD). The design features the MAX5969B as its controller. The design also uses the MAX5974A, which controls current-mode PWM converters and provides frequency foldback for PoE applications. Using these devices, this reference design is IEEE 802.3af/at compliant and is a compact and cost efficient solution for a Class 3 PD. The design can also be customised to 12V/2A Class 4 PD.

View the PDF document for more information.

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