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Integrated PFC, flyback controller

Posted: 30 Apr 2009     Print Version  Bookmark and Share

Keywords:TEA1750  power converter  flyback controller 

This application note by NXP Semiconductor describes the functionality and the control functions of the TEA1750 and the adjustments needed within the power converter application.

The TEA1750 is a member of the new generation of PFC and flyback controller combination ICs, used for efficient switched mode power supplies. It has a high level of integration which allows the design of a cost effective power supply with a low number of external components, says NXP. The TEA1750 is fabricated in a Silicon On Insulator (SOI) process. The NXP SOI process makes a wide voltage range possible, says the company.

The TEA1750 is a combination controller with a PFC and flyback controller integrated in to an SO-16 package. Both controllers operate in QR/DCM mode with valley detection. The switching is independent for each controller. The PFC output power is on-time controlled for simplicity. It is not necessary to sense the phase of the mains voltage. The flyback output power is Current mode controlled for good suppression of input voltage ripple. The communication circuitry between both controllers is integrated and no adjustment is needed.

View the PDF document for more information.

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