JPS5448030A - Vercurrent protection circuit for swtching regulator - Google Patents

Vercurrent protection circuit for swtching regulator

Info

Publication number
JPS5448030A
JPS5448030A JP11494577A JP11494577A JPS5448030A JP S5448030 A JPS5448030 A JP S5448030A JP 11494577 A JP11494577 A JP 11494577A JP 11494577 A JP11494577 A JP 11494577A JP S5448030 A JPS5448030 A JP S5448030A
Authority
JP
Japan
Prior art keywords
transistor
turned
load current
oscillation
make
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
JP11494577A
Other languages
Japanese (ja)
Inventor
Yasuyoshi Nagao
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11494577A priority Critical patent/JPS5448030A/en
Publication of JPS5448030A publication Critical patent/JPS5448030A/en
Pending legal-status Critical Current

Links

Landscapes

  • Dc-Dc Converters (AREA)

Abstract

PURPOSE: To make a protection for transistor, by means of suspending a switching operation, if detected an overcurrent, to make an output voltage going down.
CONSTITUTION: In a case of load current in the switching regulator below the rated value, the transistor is made off also with a transistor 10, for use of stopping an operation of oscillation, being in a state of off. In case of the load current flowing at a level exceeding the rated value, a transistor 13 is turned on by a voltage genetated across both ends of a resistor 15, with the transistor 10 also coming to be turned on, and a bias voltage, applied to an osicllator circuit 7, comes to be almost a level of -E, ceasing an operation of oscillation only in in a state of on of the transistor 10. If ceased an oscillation, a power transistor 1 comes to be turned off with the load current decreased to make a transistor 13 turned off, accordingly, the transistor 10 is made off with the switching regulator starting again its operation, and though an output voltage is going up, the transistors 13, 10 will be again turned on while with the load current being in an excessive level
COPYRIGHT: (C)1979,JPO&Japio
JP11494577A 1977-09-24 1977-09-24 Vercurrent protection circuit for swtching regulator Pending JPS5448030A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11494577A JPS5448030A (en) 1977-09-24 1977-09-24 Vercurrent protection circuit for swtching regulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11494577A JPS5448030A (en) 1977-09-24 1977-09-24 Vercurrent protection circuit for swtching regulator

Publications (1)

Publication Number Publication Date
JPS5448030A true JPS5448030A (en) 1979-04-16

Family

ID=14650533

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11494577A Pending JPS5448030A (en) 1977-09-24 1977-09-24 Vercurrent protection circuit for swtching regulator

Country Status (1)

Country Link
JP (1) JPS5448030A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS605773A (en) * 1983-06-20 1985-01-12 Matsushita Electric Ind Co Ltd Dc-dc converter
JPH02131360A (en) * 1988-11-08 1990-05-21 Matsushita Electric Ind Co Ltd Power protector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS605773A (en) * 1983-06-20 1985-01-12 Matsushita Electric Ind Co Ltd Dc-dc converter
JPH0132752B2 (en) * 1983-06-20 1989-07-10 Matsushita Electric Ind Co Ltd
JPH02131360A (en) * 1988-11-08 1990-05-21 Matsushita Electric Ind Co Ltd Power protector

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