JPS55115115A - Regulated power supply circuit - Google Patents
Regulated power supply circuitInfo
- Publication number
- JPS55115115A JPS55115115A JP2121879A JP2121879A JPS55115115A JP S55115115 A JPS55115115 A JP S55115115A JP 2121879 A JP2121879 A JP 2121879A JP 2121879 A JP2121879 A JP 2121879A JP S55115115 A JPS55115115 A JP S55115115A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- resistor
- output voltage
- power supply
- supply 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 prevent the thermal destruction of control transistor due to overcurrent, by short circuit of current limit resistor with the switching transistor turned on when the output voltage of the rectifying circuit falls down.
CONSTITUTION: In the power supply circuit for electronic equipment, the rectifying circuit 4 is connected to the AC power input 1, and the control transistor Tr5 and the current limit resistor 8 are connected in series at the output side of the circuit 4 and they are connected to the load 6. The switching Trs 9 and 10 are provided for the resistor 8 parallelly, and the detection amplifying circuit 7 detects the output voltage fed to the load 6. Further, if the output voltage of the circuit 4 falls down, Trs 9 and 10 are turned on, the resistor 8 is shortened and the heat dissipation of Tr5 is restricted. Thus, thermal destruction of Tr5 due to overcurrent can be avoided.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2121879A JPS55115115A (en) | 1979-02-23 | 1979-02-23 | Regulated power supply circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2121879A JPS55115115A (en) | 1979-02-23 | 1979-02-23 | Regulated power supply circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55115115A true JPS55115115A (en) | 1980-09-04 |
Family
ID=12048862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2121879A Pending JPS55115115A (en) | 1979-02-23 | 1979-02-23 | Regulated power supply circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55115115A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5174251A (en) * | 1974-12-23 | 1976-06-28 | Fujitsu Ltd | DENATSU CHOSEI HOSHIKI |
-
1979
- 1979-02-23 JP JP2121879A patent/JPS55115115A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5174251A (en) * | 1974-12-23 | 1976-06-28 | Fujitsu Ltd | DENATSU CHOSEI HOSHIKI |
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