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

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Doc ID 18376 Rev 1

 and 

 show the converter behavior in the case of half-cycle (8.3 ms) or a 

complete cycle (16.6 ms) mains dip. As can be noted, in both cases the PFC output voltage 
drops but the L6599A still works correctly, and output voltages do not show any disturbance, 
therefore demonstrating a good immunity of the circuit against mains dips.

         

         

CH3: 24 V output

CH1: HB voltage

CH2: PFC drain
CH4: PFC gate

CH3: 24 V output

CH1: HB voltage

CH2: PFC drain
CH4: PFC gate