JPS5668809A - Direct current power supply unit - Google Patents

Direct current power supply unit

Info

Publication number
JPS5668809A
JPS5668809A JP14443079A JP14443079A JPS5668809A JP S5668809 A JPS5668809 A JP S5668809A JP 14443079 A JP14443079 A JP 14443079A JP 14443079 A JP14443079 A JP 14443079A JP S5668809 A JPS5668809 A JP S5668809A
Authority
JP
Japan
Prior art keywords
trq
load
turned
short
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
Application number
JP14443079A
Other languages
Japanese (ja)
Inventor
Koichi Shiono
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.)
Sony Group Corp
Original Assignee
Aiwa 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 Aiwa Co Ltd filed Critical Aiwa Co Ltd
Priority to JP14443079A priority Critical patent/JPS5668809A/en
Publication of JPS5668809A publication Critical patent/JPS5668809A/en
Pending legal-status Critical Current

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  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

PURPOSE: To secure an assured protection for the circuit elements from the short- circuited failure of the load, by controlling the conduction of the transistor which is connected in series to the load.
CONSTITUTION: When the prescribed voltage is produced with the make of switch 4, the transistor TRQ3 is turned on for a short time decided by the capacitor C4 and the resistance R6. As a result, the TRQ1 is turned on via the TRQ2, and an application of voltage starts to the load Z. At the same time, the base current flows to the TRQ3 through the Zener diode ZD2 and the resistance R4 to keep the on-state for the TRQ3 as before. Accordingly, the TRs Q1WQ3 are kept under the on-state, and thus the prescribed level of voltage can be applied continuously to the load Z. If the load Z has a short-circuited failure, the diode ZD2 is turned off by the overcurrent of the TRQ1. As a result, the TRs Q1WQ3 are turned off instantaneously, thus ensuring an assured protection for each element of the circuit.
COPYRIGHT: (C)1981,JPO&Japio
JP14443079A 1979-11-09 1979-11-09 Direct current power supply unit Pending JPS5668809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14443079A JPS5668809A (en) 1979-11-09 1979-11-09 Direct current power supply unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14443079A JPS5668809A (en) 1979-11-09 1979-11-09 Direct current power supply unit

Publications (1)

Publication Number Publication Date
JPS5668809A true JPS5668809A (en) 1981-06-09

Family

ID=15362006

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14443079A Pending JPS5668809A (en) 1979-11-09 1979-11-09 Direct current power supply unit

Country Status (1)

Country Link
JP (1) JPS5668809A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4529810Y1 (en) * 1970-04-28 1970-11-16

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4529810Y1 (en) * 1970-04-28 1970-11-16

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