Switching Power Supplies

AC Power Supplies

General-purpose AC power supplies are used in a wide variety of applications such as equipment for general consumers, office automation and communication devices. They are required to be highly efficient and compact, and to have low power consumption. This page provides information on Fuji Electric semiconductors that are ideal for general-purpose AC power supplies.

Flyback Converter Circuit Configuration

Forward Converter Circuit Configuration

Fuji Electric Power Semiconductor Products

Power Factor Correction ICs

Control
Method
Type Name Input
voltage
Duty Current
sense
Under-voltage lockout (ON/OFF) Frequency Maximum
frequency
Zero Current
Detection
FB open short
protection
Over voltage
protection
Remarks
Criticality
mode PFC
FA5590N 10 – 26V Negative 9.6V/9.0V Self-oscillation Adjustable Current sence Voltage-Limit
by Pulse width
FA5591N 13.0V/9.0V
FA1A10N 9.6V/8.8V Fixed
FA1A11N 12.4V/8.8V
FA1A50N 9.6V/8.8V Voltage-Limit by
Pulse width and
Voltage-Limit(OVP)
FA1A60N 12.5V/7.5V Improve light
load effciency,
Cooperate with
FA6B19N/20N/
22N
FA1A61N
(Open protection only)
Improve
transient
response,
Cooperate
with FA6B21N
FA5696N 9.6V/9.0V Adjustable
FA1A00N 9.6V/8.8V Fixed
FA1A01N 12.4V/8.8V
FA1A21N Positive 17.3V/9.6V Fixed Auxiliary
winding
Voltage-Limit (VCC) For fly Back
Over load protection
FA1B00N 10 – 24V 13.0V/9.0V Adjustable Voltage-Limit by Pulse width Successor to FA5601N
FA1B10N NEW Fixed THD improvement function
Continuous
mode PFC
FA5502M 10 – 28V 94% Negative 16.5V/8.9V Adjustable 150kHz Voltage-Limit (OVP)
FA5612N 10 – 26V 9.6V/9.0V Choice
60/65kHz/jitter
(50-70kHz)
Voltage-Limit
by Pulse width
Frequency
diffusion
function
FA5613N 13.0V/9.0V

Quasi-resonant Control ICs

Type Name Input
voltage
Maximum
frequency
Overload
protection
Over voltage sense Built-in start up circuit Green mode function Under-voltage lockout (ON/OFF) Remarks
FA5570N 10 to 28V Max.
frequency
limitation
120kHz
Auto-Recovery 500V Intermittent operation 18V/8V
FA5571N ZCD Pin Over
voltage
protection
Latch
FA5573N Linear
frequency
reduction
FA5577N VCC Pin
FA5640N 11 to 26V Bottom skip control by on-off width detection Auto-Recovery ZCD Pin Intermittent operation 14V/8V
FA5641N Min. frequency
limitation
FA5642N 10V/8V
FA5643N 14V/8V Min. frequency
limitation Latch
stop function (IS pin)
FA5644N Timer-latch
FA5648N Auto-Recovery For High SW frequency

Quasi-resonant Control ICs

Brown
out
function
Type Name Duty Input voltage Frequency Current sense Over load
protection
Over power
protection
Over voltage
protection
Built-in start up circui Green mode function X-Cap discharge
function
Built-in FA8A00N 83% 12 – 24V 65kHz Positive Auto-Recovery 2Stage
(OPP ratio 1:1.4*)
Latch 500V Linearly frequency reduction + Intermittent operation Built-in
FA8A40N 100kHz
FA8A01N 65kHz Timer-latch
FA8A41N 100kHz
FA8B16N 65kHz Auto-Recovery 2Stage (OPP ratio 1:1.5*)
FA8A27N 10 – 28V Timer-latch 2Stage
(OPP ratio 1:1.8*)
FA8A37N
FA8A39N
FA8A83N 10 – 24V 65kHz Timer-latch 1Stage 650V
FA8A86N 100kHz Auto-Recovery
Not built-in FA5680N 85% 11 – 24V 65kHz Negative Auto-Recovery 1Stage Latch 750V Linearly frequency reduction + Intermittent operation
FA5681N Timer-latch
FA8A60N 83% 10 – 24V 65kHz Positive Auto-Recovery 500V
FA8A64N 100kHz
FA8A61N 65kHz Timer-latch
FA8A65N 100kHz
FA8A70N 65kHz Auto-Recovery Built-in
FA8A74N 100kHz
FA8A71N 65kHz Timer-latch
FA8A75N 100kHz
FA8A12N 12 – 24V 65kHz Auto-Recovery 2Stage
FA8A80N 10 – 24V 65kHz Auto-Recovery 1Stage 650V
FA8A84N 100kHz
FA8A81N 65kHz Timer-latch
FA8A85N 100kHz
FA8A90N 65kHz Auto-Recovery Built-in
FA8A94N 100kHz
FA8A91N 65kHz Timer-latch
FA8A87N 65kHz
FA8A95N 100kHz