JPS57182818A - Current control system for switching circuit - Google Patents
Current control system for switching circuitInfo
- Publication number
- JPS57182818A JPS57182818A JP6783781A JP6783781A JPS57182818A JP S57182818 A JPS57182818 A JP S57182818A JP 6783781 A JP6783781 A JP 6783781A JP 6783781 A JP6783781 A JP 6783781A JP S57182818 A JPS57182818 A JP S57182818A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- level
- current
- value
- point
- 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
- 239000003990 capacitor Substances 0.000 abstract 4
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
- H02M3/156—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 with automatic control of output voltage or current, e.g. switching regulators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Electronic Switches (AREA)
Abstract
PURPOSE:To make an average current value constant, by discharing the electric charge of a capacitor, which is charged with a voltage corresponding to only the crest value f a detected current pulse, properly with a constant current value and comparing it with a control voltage. CONSTITUTION:An amplifying circuit 107 charges the voltage between both ends of a capacitor 8 in accordance with the voltage value detected by a current detecting circuit 101, and the value of a resistance 14 is sufficiently larger than that of a rsistance 5. When the voltage of the capacitor 8 is discharged with a constant current value by a constant current circuit 106 to reach a control voltage level Vx, the low level is outputted at a point C; and when the level at a point D is high, the level at a point F is low, and a transistor TR1 is turned on to start flowing a current. The level at the point F continues to be low until the level at the point D becomes low. When the current is flowed to the TR 1, a voltage corresponding to the crest value of the current pulse appears between points A and A', and this voltage is charged to the capacitor quickly by the amplifying circuit 107 and is held until the TR1 is turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6783781A JPS57182818A (en) | 1981-05-06 | 1981-05-06 | Current control system for switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6783781A JPS57182818A (en) | 1981-05-06 | 1981-05-06 | Current control system for switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57182818A true JPS57182818A (en) | 1982-11-10 |
Family
ID=13356453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6783781A Pending JPS57182818A (en) | 1981-05-06 | 1981-05-06 | Current control system for switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57182818A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11054121B2 (en) | 2017-08-15 | 2021-07-06 | Dyson Technology Limited | Lighting device |
-
1981
- 1981-05-06 JP JP6783781A patent/JPS57182818A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11054121B2 (en) | 2017-08-15 | 2021-07-06 | Dyson Technology Limited | Lighting device |
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