JPS63124035U - - Google Patents
Info
- Publication number
- JPS63124035U JPS63124035U JP1278787U JP1278787U JPS63124035U JP S63124035 U JPS63124035 U JP S63124035U JP 1278787 U JP1278787 U JP 1278787U JP 1278787 U JP1278787 U JP 1278787U JP S63124035 U JPS63124035 U JP S63124035U
- Authority
- JP
- Japan
- Prior art keywords
- light bulb
- load
- drive
- transistor
- voltage
- 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
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
Description
第１図は本考案に係る電球負荷駆動回路の実施
例を示す回路図、第２図は従来の電球負荷駆動回
路を示す回路図である。
１……電球負荷、２……過負荷保護回路、３…
…検出回路、４……制御回路、Ｑ１……パワート
ランジスタ、Ｑ２……ドライブトランジスタ、Ｌ
……電球。
FIG. 1 is a circuit diagram showing an embodiment of a light bulb load drive circuit according to the present invention, and FIG. 2 is a circuit diagram showing a conventional light bulb load drive circuit. 1... Bulb load, 2... Overload protection circuit, 3...
...Detection circuit, 4...Control circuit, Q1 ...Power transistor, Q2 ...Drive transistor, L
……light bulb.
Claims (1)
ンジスタと、該パワートランジスタに駆動電流を
供給するドライブトランジスタと、該ドライブト
ランジスタの負荷と、前記電球負荷の電圧を検出
し該電圧が所定時間所定電圧以下となつたときに
前記ドライブトランジスタ及びパワートランジス
タをカツトオフする過負荷保護回路とを備えた電
球負荷駆動回路において、 前記ドライブトランジスタの前記負荷を電球と
したことを特徴とする電球負荷駆動回路。[Claims for Utility Model Registration] A light bulb load, a power transistor that drives the light bulb load, a drive transistor that supplies a drive current to the power transistor, a load of the drive transistor, and a voltage of the light bulb load that is detected. A light bulb load drive circuit comprising an overload protection circuit that cuts off the drive transistor and the power transistor when the voltage is below a predetermined voltage for a predetermined time, characterized in that the load of the drive transistor is a light bulb. Light bulb load drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1278787U JPS63124035U (en) | 1987-02-02 | 1987-02-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1278787U JPS63124035U (en) | 1987-02-02 | 1987-02-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63124035U true JPS63124035U (en) | 1988-08-12 |
Family
ID=33446574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1278787U Pending JPS63124035U (en) | 1987-02-02 | 1987-02-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63124035U (en) |
-
1987
- 1987-02-02 JP JP1278787U patent/JPS63124035U/ja active Pending
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