JPS55115115A - Regulated power supply circuit - Google Patents

Regulated power supply circuit

Info

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
Application number
JP2121879A
Other languages
Japanese (ja)
Inventor
Kenji Sakamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Original Assignee
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Sanyo Electric Co Ltd, Sanyo Electric Co Ltd filed Critical Tokyo Sanyo Electric Co Ltd
Priority to JP2121879A priority Critical patent/JPS55115115A/en
Publication of JPS55115115A publication Critical patent/JPS55115115A/en
Pending legal-status Critical Current

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
JP2121879A 1979-02-23 1979-02-23 Regulated power supply circuit Pending JPS55115115A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5174251A (en) * 1974-12-23 1976-06-28 Fujitsu Ltd DENATSU CHOSEI HOSHIKI

Patent Citations (1)

* Cited by examiner, † Cited by third party
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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