JPS6284330U - - Google Patents
Info
- Publication number
- JPS6284330U JPS6284330U JP17590485U JP17590485U JPS6284330U JP S6284330 U JPS6284330 U JP S6284330U JP 17590485 U JP17590485 U JP 17590485U JP 17590485 U JP17590485 U JP 17590485U JP S6284330 U JPS6284330 U JP S6284330U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- circuit
- resistor
- overcurrent
- current detection
- 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 9
- 238000010586 diagram Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 1
Description
第１図は本考案に係る過電流検出回路の構成を
示すブロツク図、第２図は第１図に示す過電流検
出回路の動作を説明する為の波形図で、同図イは
電流検出用抵抗器に所定時間継続する電流が流れ
た場合を示す波形図、同図ロはパルス電流が流れ
た場合を示す波形図、第３図は従来の過電流検出
回路の構成を示す回路図、第４図は第３図に示す
従来の過電流検出回路の動作を説明するための波
形図、第５図、第６図はそれぞれ本考案に係る過
電流検出回路の具体例を示す回路図である。
図中、１……電流検出用抵抗器、２，６，１６
……トランジスタ、３，５，７，８，９，１２，
１３，１４……抵抗器、１０……サイリスタ、１
１……コンデンサ、２１，２２，２３，２４，２
５，２６……端子、２８……ラツチ回路。
Fig. 1 is a block diagram showing the configuration of the overcurrent detection circuit according to the present invention, and Fig. 2 is a waveform diagram for explaining the operation of the overcurrent detection circuit shown in Fig. 1. Figure 3 is a waveform diagram showing the case where a current that continues for a predetermined time flows through the resistor; Figure 3 is a waveform diagram showing the case where a pulse current flows; FIG. 4 is a waveform diagram for explaining the operation of the conventional overcurrent detection circuit shown in FIG. 3, and FIGS. 5 and 6 are circuit diagrams showing specific examples of the overcurrent detection circuit according to the present invention, respectively. . In the figure, 1... Current detection resistor, 2, 6, 16
...Transistor, 3, 5, 7, 8, 9, 12,
13, 14...Resistor, 10...Thyristor, 1
1... Capacitor, 21, 22, 23, 24, 2
5, 26... terminal, 28... latch circuit.
Claims (1)
ツタを接続し、該トランジスタのベースから抵抗
器を介して前記電流検出用抵抗器の他端に接続す
ると共に、該トランジスタのコレクタに該トラン
ジスタのＯＮ・ＯＦＦ動作のデユーテイサイクル
が所定の値以上であつたら過電流検出信号を出力
し且つ該過電流信号の出力状態を保持する回路を
接続したことを特徴とする過電流検出回路。 The emitter of the transistor is connected to one end of the current detection resistor, the base of the transistor is connected to the other end of the current detection resistor via the resistor, and the ON/OFF control of the transistor is connected to the collector of the transistor. An overcurrent detection circuit characterized in that a circuit is connected to the circuit that outputs an overcurrent detection signal when the duty cycle of operation is equal to or greater than a predetermined value and maintains the output state of the overcurrent signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17590485U JPS6284330U (en) | 1985-11-15 | 1985-11-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17590485U JPS6284330U (en) | 1985-11-15 | 1985-11-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6284330U true JPS6284330U (en) | 1987-05-29 |
Family
ID=31115660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17590485U Pending JPS6284330U (en) | 1985-11-15 | 1985-11-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6284330U (en) |
-
1985
- 1985-11-15 JP JP17590485U patent/JPS6284330U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6284330U (en) | ||
| JPH0360839U (en) | ||
| JPS6239335U (en) | ||
| JPH0247833U (en) | ||
| JPS61158722U (en) | ||
| JPH0265171U (en) | ||
| JPH01113533U (en) | ||
| JPS61113600U (en) | ||
| JPS6170229U (en) | ||
| JPS621430U (en) | ||
| JPS60181927U (en) | Transistor switching circuit with protection function | |
| JPS6412487U (en) | ||
| JPH0488334U (en) | ||
| JPS61195636U (en) | ||
| JPS6237451U (en) | ||
| JPS61205226U (en) | ||
| JPS6416143U (en) | ||
| JPS6219088U (en) | ||
| JPS5834442U (en) | DC two-wire non-contact switch | |
| JPS63198228U (en) | ||
| JPH0390131U (en) | ||
| JPS6237321U (en) | ||
| JPS6247234U (en) | ||
| JPH0363081U (en) | ||
| JPS61168712U (en) |