FA5533 - Fuji Electric

FA5533 (FA5533 / FA5534) PFC / PWM Combination

PFC / PWM Combination IC FA5533/34 Features Features •Critical mode Power Factor Correction and PWM are combined : suitable for smaller power supply •Internal start-up circuit with 500V rating and low frequency operation achieves 340mW input at no load when PFC stops. • Small Output Capacitance : Linearly reduced frequency for light load makes small ripple v.

Features

Features
•Critical mode Power Factor Correction and PWM are combined : suitable for smaller power supply
•Internal start-up circuit with 500V rating and low frequency operation achieves 340mW input at no load when PFC stops.
• Small Output Capacitance : Linearly reduced frequency for light load makes small ripple voltage.
• PFC stops below half load ( only for FA5533 )
•Vcc rating 28V allows no series regulator for PW M_ FB LV www.DataSheet4U.com BlockDiagram Diagram Block COMP MUL underdevelopment development under PFC_ IS ZCD AC LIGHT_ LOAD ZCD ERR PFC_ FB + MUL R TIMER R 1shot Ov.