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Reference Design Creates Complete LCD Power System

Wed, 02/25/2009 - 5:16am

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GreenPoint open reference design for LCD TV power supplies from On SemiconductorCombining the main system power with the backlight inverter, the GreenPoint open reference design for LCD TV power supplies from On Semiconductor eliminates a complete power conversion stage, improving overall system efficiency, simplifying the design and reducing the bill of materials. The 180-W design meets IEC 61000-3-2 for harmonic content requirements, and exceeds global standby requirements with a typical standby power consumption of 400 mW with a 50-mW load. The reference design addresses all functional blocks of the HV-LIPS LCD TV power supply, including power factor correction; control, signal, and audio power; high voltage backlight inverter; and CCFL drive and current balancing.  A proprietary variable-frequency control architecture achieves up to 60 W output capability from the flyback stage while meeting the standby requirements, thus eliminating the need for a dedicated standby supply. The design was completed in conjunction with Microsemi Corporation.

ON Semiconductor
www.onsemi.com

Microsemi
www.microsemi.com

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