JPS5641767A - Dc-dc converter - Google Patents
Dc-dc converterInfo
- Publication number
- JPS5641767A JPS5641767A JP11472679A JP11472679A JPS5641767A JP S5641767 A JPS5641767 A JP S5641767A JP 11472679 A JP11472679 A JP 11472679A JP 11472679 A JP11472679 A JP 11472679A JP S5641767 A JPS5641767 A JP S5641767A
- Authority
- JP
- Japan
- Prior art keywords
- load
- transistor
- time
- conductive
- conductive time
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
Abstract
PURPOSE:To prevent a rise of load voltage and improve efficiency by a method wherein the conductive time of a transistor at the input side controlled in response to output from a converter is detected, and a resistor is inserted in parallel with load only when load is light. CONSTITUTION:The primary winding of a transformer T and the transistor TR, are connected to a DC power source Ei, and DC currents are fed to load L through a smoothing circuit from the secondary winding of the transformer. The conductive time of the transistor TR1 is controlled by means of a control circuit 2 so that output voltage at the load side is fixed. The conductive time of the transistor TR1 in the case when currents flowing through the load reach some value is previously set, a normal time comparison circuit 3 generates output when the conductive time of the transistor TR1 becomes to the set time (when light load), and a switch SW1 to a resistor R1 connected in parallel with the load L is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11472679A JPS5641767A (en) | 1979-09-08 | 1979-09-08 | Dc-dc converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11472679A JPS5641767A (en) | 1979-09-08 | 1979-09-08 | Dc-dc converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5641767A true JPS5641767A (en) | 1981-04-18 |
Family
ID=14645080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11472679A Pending JPS5641767A (en) | 1979-09-08 | 1979-09-08 | Dc-dc converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5641767A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59147315U (en) * | 1983-03-24 | 1984-10-02 | 株式会社東芝 | PWM amplifier |
| JPH0161882U (en) * | 1987-10-12 | 1989-04-20 |
-
1979
- 1979-09-08 JP JP11472679A patent/JPS5641767A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59147315U (en) * | 1983-03-24 | 1984-10-02 | 株式会社東芝 | PWM amplifier |
| JPH0161882U (en) * | 1987-10-12 | 1989-04-20 |
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