JPS54156123A - Dc power source of the switching type - Google Patents
Dc power source of the switching typeInfo
- Publication number
- JPS54156123A JPS54156123A JP6516878A JP6516878A JPS54156123A JP S54156123 A JPS54156123 A JP S54156123A JP 6516878 A JP6516878 A JP 6516878A JP 6516878 A JP6516878 A JP 6516878A JP S54156123 A JPS54156123 A JP S54156123A
- Authority
- JP
- Japan
- Prior art keywords
- power source
- driving
- pulse width
- input
- greatest
- 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
- 230000003534 oscillatory effect Effects 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
PURPOSE: To protect conversion transformer cores from saturation and obtain smaller cores by equipping a circuit which controls the greatest driving pulse widths of driving transistors according to input voltage.
CONSTITUTION: When a rated voltage is input from a DC power source V and a load 9 is normal, the driving pulse width of a driving transistor 1 is driven by being controlled up to about 30 % of the oscillatory period by a pulse width modulation circuit 5. When the voltage input from the DC power source comes under the rated voltage, the driving pulse width of the driving transistor 1 goes beyond 30% of the oscillatory period by means of a pulse modulation circuit 5 and the positive pulse output from the greatest duty control circuit 8 is controlled in larger width. When the input voltage supplied from the DC power source V exceeds the rated value, the width of the pulses output from the control circuit 8 of the greatest driving pulse width becomes smaller.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6516878A JPS54156123A (en) | 1978-05-31 | 1978-05-31 | Dc power source of the switching type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6516878A JPS54156123A (en) | 1978-05-31 | 1978-05-31 | Dc power source of the switching type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54156123A true JPS54156123A (en) | 1979-12-08 |
Family
ID=13279079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6516878A Pending JPS54156123A (en) | 1978-05-31 | 1978-05-31 | Dc power source of the switching type |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54156123A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62268361A (en) * | 1986-05-10 | 1987-11-20 | Fujitsu Denso Ltd | Switching power source circuit |
-
1978
- 1978-05-31 JP JP6516878A patent/JPS54156123A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62268361A (en) * | 1986-05-10 | 1987-11-20 | Fujitsu Denso Ltd | Switching power source circuit |
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