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參數資料
型號: FA13842N
廠商: FUJI ELECTRIC CO LTD
元件分類: 穩壓器
英文描述: CMOS IC(For Switching Power Supply Control)
中文描述: 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8
封裝: SOP-8
文件頁數: 11/15頁
文件大小: 151K
代理商: FA13842N
FA13842, 13843, 13844, 13845
11
Fig. 12
Fig. 13
Fig. 14
Fig. 11
~ +
~
DB
R1
D1
C2
+
MOSFET
Rs
6
1
7
FA13842
R4
R6
D5
R7
R8
PC1
Tr1
Tr2
R15
Tr5
R16
PC1
C6
R3
C1
T1
D6
R13
Tr4
+
C7
R14
AC INPUT
+
~
+
~
R1
D1
C2
+
MOSFET
Rs
6
1
7
FA13842
R4
R6
D5
R7
R8
PC1
Tr1
Tr2
C6
R3
DB
ZD2
PC1
C1
T1
D6
+C7
R9
AC INPUT
+
~
+
~
6
1
7
FA13842
R4
D5
R6
Tr1
Tr2
ZD1
C6
R3
DB
R1
D1
C2
MOSFET
Rs
C1
T1
AC INPUT
+
+
+
~
6
1
3
7
FA13842
R4
R6
D5
Tr1
Tr2
C6
R3
~
R1
D1
C2
+
MOSFET
R12
Tr3
C8
R10
R11
Rs
C1
T1
AC INPUT
+
3-1 The method of detecting an overvoltage (detection
on primary side)
A typical latched shutdown circuit to protect against
overvoltages detected on the primary side is shown in Fig. 11.
When the secondary voltage increases in the flyback circuit,
the voltage of the bias winding also increases in proportion.
When this voltage increase is detected by zener diode ZD1, a
latched shutdown is accomplished. As the secondary voltage
is detected through a transformer, detection accuracy is low.
3-2 The method of detecting an overvoltage (detection
on secondary side)
A typical latched shutdown circuit to protect against
overvoltages detected on the secondary side is shown in
Fig. 12.
The detected voltage accuracy is high compared to
overvoltage detection on the primary side.
3-3 The method of detecting an overcurrent (detection
of primary current)
A typical primary overcurrent detection circuit is shown in
Fig. 13.
3-4 The method of detecting an overcurrent (detection
of secondary current)
A typical secondary overcurrent detection circuit is shown in
Fig. 14.
相關PDF資料
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FA13842P CMOS IC(For Switching Power Supply Control)
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相關代理商/技術參數
參數描述
FA13842N-D1 制造商:Fuji Electric 功能描述:
FA13842P 制造商:FUJI 制造商全稱:Fuji Electric 功能描述:CMOS IC(For Switching Power Supply Control)
FA13842P-D1 制造商:Fuji Electric 功能描述:
FA13843 制造商:未知廠家 制造商全稱:未知廠家 功能描述:電源電路,類似UA3843
FA13843N 制造商:FUJI 制造商全稱:Fuji Electric 功能描述:CMOS IC(For Switching Power Supply Control)
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