lc5500 Sanken Electric Co., Ltd., lc5500 Datasheet - Page 26
![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: 26 of 38
- Download datasheet (2Mb)
Copy Right: SANKEN ELECTRIC CO., LTD.
③OVP 端子過電圧保護機能
過電圧保護機能が動作し、間欠発振動作になります。
圧を検出する保護機能です。
OVP 端子-GND 端子間に、OVP 端子しきい電圧 V
直列接続された LED 負荷で、LED 負荷オープンなどのアブノーマル時に、図 6-2 の PC2 を介して、2 次側過電
図 7-30 に OVP 端子の OVP 動作波形を示します。
31.5V(TYP)
31.5V(TYP)
2.0V(TYP)
2.6V(TYP)
V
V
V
V
LC5500 シリーズ
CC(OVP)
CC(OVP)
OVP(th)
OCP(OVP)
V
V
V
V
V
V
OVP
Io
OCP
FB
CC
I
CC
I
FB
D
D
シリーズ
シリーズ アプリケーションノート
シリーズ
図 7-29 OCP 端子 OVP 動作時の各部波形(LC552XD/LC552XF)
図 7-30 ISENSE 端子 OVP 動作時の各部波形(LC552XD/LC552XF)
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
OVP 検出
OVP 検出
Page.26
起動回路
動作期間
起動回路
動作期間
OVP(th)
= 2.0V(TYP)以上の電圧が印加されると、OVP 端子
V
V
FB
FB
= 2.0V 以上で起動回路 OFF
= 2.0V 以上で起動回路 OFF
起動回路
動作期間
起動回路
動作期間
GND(V
GND(V
GND(V
GND(Io)
GND(V
GND(V
時間 t
時間 t
V
V
V
V
V
V
GND(I
GND(I
CC(BIAS)1
CC(ON)
CC(BIAS)1
CC(OFF)
CC(ON)
CC(OFF)
OVP
FB
FB
CC
OCP
)
)
)
)
,V
=15.1V(TYP)
=15.1V(TYP)
D
=9.4V(TYP)
D
=9.4V(TYP)
)
)
=11.0V(TYP)
=11.0V(TYP)
CC
Rev. 0.3
)
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