JPS5448030A - Vercurrent protection circuit for swtching regulator - Google Patents
Vercurrent protection circuit for swtching regulatorInfo
- 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
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
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)
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 |
-
1977
- 1977-09-24 JP JP11494577A patent/JPS5448030A/en active Pending
Cited By (3)
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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