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KX-F910BX
Ei
P
T101
D201
P...PRIMARY WINDING
S...SECONDARY WINDING
B...CONTROL WINDING
S
Eo
Q101
CONTROL CIRCUIT
B
+
12. SWITCHING POWER SUPPLY SECTION
Block Diagram
[Input Circuit]
Input current goes into input rectifier circuit through filter circuit. Fitter circuit decreases noise terminal voltage and
noise electric field strength.
[Rectifier Circuit]
Input current is rectified by D101 and charge C106 to make DC voltage, then supply power to converter
circuit. Voltage is supplied to control IC’s kick-on voltage through R102 and R103. Inrush current is limited by
thermistor TH101.
[Converter circuit]
The converter circuit of this power supply circuit is called fly back converter.
We explain the operation of this circuit with the simple circuit.
Input
Circuit
AC Input
Rectifier
Circuit
Converter
Circuit
Control
Circuit
Error Detecting
Circuit
DC-DC
Converter
Circuit
A
B
+
-
C106
Q101
G
GND
+5V Output
24V Output
24V
Output Circuit
H
C
D
Over
Current
Circuit
SUB Printed
Circuit Board
IC101
E
F
A-B Voltage Wave Form
0
C-D Voltage Wave Form
0
Voltage Wave Form
0
E-F
G-H
Содержание KX-F910BX
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