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Fuji Electric's Semiconductors
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HOME  >  Technical Information >  Products by Use >  Switching power supplies

Products by Use
Switching power supplies

AC power supply

The increasing popularity of digital devices (such as digital televisions and DVD recorders), and increasing use of communication devices following the start of one-segment broadcasting, have combined to create demand for more efficient, compact, and reliable general-purpose AC power supplies.
Below, we showcase Fuji Electric semiconductors that are optimal for general-purpose AC power supplies.


Flyback Forward

AC power supplies (printers & other) :
Flyback converter circuit configuration

circuit configuration

AC power supplies (printers & other) :
Recommended devices for flyback converters

Off Line Converter Secondary rectification
Control IC MOSFET Diode Synchronous rectifiers
+3.3, +5, +8, +12, +19, +24, +32
PWM-IC
Quasi-resonant IC
600V
650V

700V
800V
900V
20VSBD
30VSBD
40/45VSBD
60VSBD
80VSBD
90/100VSBD
200VSBD
200VLLD
300VLLD
400VLLD
600VLLD
100V
Trench MOS


PFC Circuit Off Line Converter Secondary rectification
Control IC MOSFET Diode Control IC MOSFET Diode Synchronous rectifiers
+3.3, +5, +8, +12, +19, +24, +32
ICs for PFC
500V
600V
650V

SuperLLD2
(DCM)

SuperLLD3
(CCM)

PWM-IC
Quasi-resonant IC
600V
650V

700V
20VSBD
30VSBD
40/45VSBD
60VSBD
80VSBD
90/100VSBD
200VSBD
200VLLD
300VLLD
400VLLD
600VLLD
100V
Trench MOS


AC power supplies (printers & other) :
Forward converter circuit configuration

circuit configuration

AC power supplies (printers & other) :
Recommended devices for forward converters

PFC Circuit Off Line Converter Secondary rectification
Control IC MOSFET Diode Control IC MOSFET Diode Synchronous rectifiers
+3.3, +5, +8, +12, +19, +24, +32
ICs for PFC
500V
600V
650V

SuperLLD2
(DCM)

SuperLLD3
(CCM)

PWM-IC
Quasi-resonant IC
900V
20VSBD
30VSBD
40/45VSBD
60VSBD
80VSBD
90/100VSBD
200VSBD
200VLLD
300VLLD
400VLLD
600VLLD
100V
Trench MOS