JPS6455612A - Dc power unit - Google Patents
Dc power unitInfo
- Publication number
- JPS6455612A JPS6455612A JP21204987A JP21204987A JPS6455612A JP S6455612 A JPS6455612 A JP S6455612A JP 21204987 A JP21204987 A JP 21204987A JP 21204987 A JP21204987 A JP 21204987A JP S6455612 A JPS6455612 A JP S6455612A
- Authority
- JP
- Japan
- Prior art keywords
- load
- current
- base
- collector
- circuit
- 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
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
PURPOSE:To miniaturize a DC powder unit and to reduce the cost by reducing the collector current at the time of short-circuiting a load. CONSTITUTION:The collector of a transistor TR 14 is connected to the end of a power source 11, and a constant current circuit 13 is connected between the base and the collector of the TR 14, and one end of an attraction type constant voltage circuit 12 and a load 17 are connected to the other end of the power source 11. A current feedback resistance 15 and a bias resistance 16 are connected between the base and the emitter of the TR 14, and the other end of the load 17 is connected to the connection point between both resistances 15 and 16. The collector current at the time of short-circuiting the load is not a certain value or larger because the base current of the TR is determined by a constant current circuit, and a constant current type dropping characteristic is caused, and the loss of the TR can be reduced. Since the base of the TR has a certain voltage by a constant voltage circuit, the voltage supplied to the load is stabilized. Thus, the power unit is miniaturized and the cost is reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21204987A JPS6455612A (en) | 1987-08-26 | 1987-08-26 | Dc power unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21204987A JPS6455612A (en) | 1987-08-26 | 1987-08-26 | Dc power unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6455612A true JPS6455612A (en) | 1989-03-02 |
Family
ID=16616020
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21204987A Pending JPS6455612A (en) | 1987-08-26 | 1987-08-26 | Dc power unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6455612A (en) |
-
1987
- 1987-08-26 JP JP21204987A patent/JPS6455612A/en active Pending
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