JPS63181024U - - Google Patents
Info
- Publication number
- JPS63181024U JPS63181024U JP7267387U JP7267387U JPS63181024U JP S63181024 U JPS63181024 U JP S63181024U JP 7267387 U JP7267387 U JP 7267387U JP 7267387 U JP7267387 U JP 7267387U JP S63181024 U JPS63181024 U JP S63181024U
- Authority
- JP
- Japan
- Prior art keywords
- source
- overcurrent protection
- protection circuit
- gate
- main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
- Power Conversion In General (AREA)
- Electronic Switches (AREA)
Description
第１図は本考案の第１の実施例の回路図、第２
図は本考案の第２の実施例の回路図、第３図は従
来の過電流保護回路の一例の回路図である。
１，２……過電流保護回路、３……主回路、Ｃ
……コンデンサ、ＥＤ……直流電源、ＱＤ……Ｍ
ＯＳトランジスタ、ＲＬ……負荷、Ｒｉ……電流
検出抵抗、Ｒ１，Ｒ２……抵抗、ＴＨＹ……サイ
リスタ、ＴＩ……入力端子、ＧＤ……ゲート、Ｓ
Ｍ……主ソース、ＳＳ……補助ソース、ｉＬ……
主電流、ｉｓｓ……補助ソース電流、ｖＧ……制
御信号、ｖｉ……電流検出信号。
Figure 1 is a circuit diagram of the first embodiment of the present invention;
The figure is a circuit diagram of a second embodiment of the present invention, and FIG. 3 is a circuit diagram of an example of a conventional overcurrent protection circuit. 1, 2... Overcurrent protection circuit, 3... Main circuit, C
...Capacitor, ED...DC power supply, QD...M
OS transistor, RL...Load, Ri...Current detection resistor, R1 , R2 ...Resistor, THY...Thyristor, TI...Input terminal, GD...Gate, S
M...Main source, SS...Auxiliary source, iL...
Main current, i ss ... auxiliary source current, vG ... control signal, v i ... current detection signal.
Claims (1)
ースよりも小さい面積の補助ソースを備えた二重
ソース形のＭＯＳトランジスタと負荷と直流電源
とで閉回路を構成する主回路の過電流を検出して
遮断する過電流保護回路において、該過電流保護
回路は前記主ソースと前記補助ソース間に挿入さ
れた電流検出抵抗の電流検出信号がゲートに入力
しアノードが前記ＭＯＳトランジスタのゲートに
接続しカソードが前記主ソースに接続するサイリ
スタを含むことを特徴とする過電流保護回路。 A control signal is input to the gate to detect overcurrent in the main circuit, which consists of a double source type MOS transistor with a main source and an auxiliary source with a smaller area than the main source, a load, and a DC power supply, forming a closed circuit. In the overcurrent protection circuit, a current detection signal of a current detection resistor inserted between the main source and the auxiliary source is input to the gate, an anode is connected to the gate of the MOS transistor, and a cathode is connected to the overcurrent protection circuit. An overcurrent protection circuit characterized in that the overcurrent protection circuit includes a thyristor connected to the main source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7267387U JPS63181024U (en) | 1987-05-14 | 1987-05-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7267387U JPS63181024U (en) | 1987-05-14 | 1987-05-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63181024U true JPS63181024U (en) | 1988-11-22 |
Family
ID=30916332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7267387U Pending JPS63181024U (en) | 1987-05-14 | 1987-05-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63181024U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997045957A1 (en) * | 1996-05-28 | 1997-12-04 | Hitachi, Ltd. | Semiconductor device |
-
1987
- 1987-05-14 JP JP7267387U patent/JPS63181024U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997045957A1 (en) * | 1996-05-28 | 1997-12-04 | Hitachi, Ltd. | Semiconductor device |
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