lc5500 Sanken Electric Co., Ltd., lc5500 Datasheet - Page 31
![no-image](/images/manufacturer_photos/0/5/582/sanken_electric_co___ltd__sml.jpg)
lc5500
Manufacturer Part Number
lc5500
Description
Lc5500?????????mosfet ???ic
Manufacturer
Sanken Electric Co., Ltd.
Datasheet
1.LC5500.pdf
(38 pages)
- Current page: 31 of 38
- Download datasheet (2Mb)
(R3+R
E
E
Copy Right: SANKEN ELECTRIC CO., LTD.
X1
rev1
fw1
は、OCP 端子流出電流 I
の電圧降下 R3×I と、OCP 端子の流出電流 I
力 Max 時の過電流点の差を小さくできます。
D
)×I
ZX1
入力補正回路を接続しない場合は、図 7-41 の上図のように、過電流検出しきい電圧 Vocp= −0.60V(TYP)
入力補正回路を接続した場合、図 7-41 の下図のように、過電流検出しきい電圧と入力補正電流 I による R3
このため、AC 入力ピーク(E
R
R
OCP
OCP
100V
I
100V
t
A
DP
I
ON
LC5500 シリーズ
DP
D
ZX1
V
V
OCP
OCP
図 7-40 入力電圧に対する各電圧波形(擬似共振動作時)
シリーズ
シリーズ アプリケーションノート
シリーズ
+
-
+
-
R3
Vocp
Vocp
+
+
R3
1
1
OCP
S/GND
S/GND
Rocp
Rocp
+
-
-
(R3+R
入力電圧になるとマイナス電圧を発生
OCP
OCP
が加わった過電流検出点になります。
I
-
-
R3
R3
OCP
I
IN(PK)
アプリケーションノート
アプリケーションノート
アプリケーションノート
OCP
3
3
図 7-41
より、
X1
-
+
+
D
150V
150V
-
)で補正電流 I を流すと、図 7-41 の I
t
)×I は Efw1 が D
ON
B
ZX1
Iocp
R
V
3
R
でクランプされる電圧
OCP
X1
Rocp×I
Rocp×I
I
入力補正時の時のドレイン電流補正波形
より、
R
OCP
Page.31
OCP
DP
DP
V
’
による電圧降下 R3×I
OCP
I
DP
ZX1
-
R
電圧以上の
Vocp
Vocp
R3
OCP
200V
200V
t
R3×Iocp
R3×Iocp
R3×I
ON
C
Rocp×I
Rocp×I
I
I
OCP
DP
DP
DP
-
’
R3
OCP
DP
-------------- (4)
’が過電流点になり、入力 Min と入
の総和を IC は検出します。
I
補助巻線
の電圧波形
R3×Iocp
OCP
I
DP
I -
’
230V
230V
t
ON
D
Vocp
I
DP
R3×Iocp
Vocp
R3×I
-------------- (5)
0V
AC
AC
Rev. 0.3
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