Техническая Спецификация для STMicroelectronics 170 W power supply with PFC and standby supply for flat TV using the L6564, L6599A, and Viper27LN EVL EVL170W-FTV

February 2011

Doc ID 18376 Rev 1

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170 W power supply with PFC and standby supply for flat TV

using the L6564, L6599A, and Viper27LN

This application note describes the characteristics and features of a 170 W, wide input 
mains range, power-factor-corrected, demonstration board for flat TVs or industrial 
applications. The electrical specifications are tailored to a typical flat TV. 

The architecture is made up of three stages: a front-end PFC pre-regulator based on the 
L6564 TM (transition mode) boost PFC controller and a downstream LLC resonant half 
bridge converter stage, built around the new L6599A resonant controller, which provides two 
regulated output voltages at 12 V and 24 V. In addition, a flyback-based standby supply 
delivers 10 W to a 5 V output. Thanks to the chipset used, this design achieves very high 
efficiency, compliant with ENERGY STAR

®

 eligibility criteria (EPA rev. 2.0 EPS), as well as 

very low input consumption during standby operation.