JPS5762774A - Output voltae control circuit - Google Patents
Output voltae control circuitInfo
- Publication number
- JPS5762774A JPS5762774A JP13656980A JP13656980A JPS5762774A JP S5762774 A JPS5762774 A JP S5762774A JP 13656980 A JP13656980 A JP 13656980A JP 13656980 A JP13656980 A JP 13656980A JP S5762774 A JPS5762774 A JP S5762774A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- transistor
- proportional
- output
- vcc
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
- H02M3/3385—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement with automatic control of output voltage or current
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
PURPOSE:To improve variation in output voltage with a light load, by determining timing to break supply of base current with a voltage that is the sum of a voltage that is proportional to the collector current of the transistor and a voltage that is proportional to the output voltage. CONSTITUTION:A control voltage (VRE+Vcc) which is the sum of a voltage VRE that is proportional to the collector current of a transistor Q1 that is developed in the emitter resistance RE and a voltage Vcc that is proportional to the output voltage developed in a capacitor Cc is obtained, and this control voltage is made to turn on the transistor Q2 and turn off the transistor Q1 when it goes over the base voltage of a transistor Q2. In this arrangement control of the voltage Vcc forcibly pulls out the base current of the transistor Q1 with the transistor Q2 to reduce loss of the transistor Q1 and is able to suppress variation in the output voltage for a light load.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13656980A JPS5762774A (en) | 1980-09-30 | 1980-09-30 | Output voltae control circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13656980A JPS5762774A (en) | 1980-09-30 | 1980-09-30 | Output voltae control circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5762774A true JPS5762774A (en) | 1982-04-15 |
Family
ID=15178313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13656980A Pending JPS5762774A (en) | 1980-09-30 | 1980-09-30 | Output voltae control circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5762774A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62203561A (en) * | 1986-02-04 | 1987-09-08 | Fujitsu Ltd | Power circuit |
JPS62159189U (en) * | 1986-03-31 | 1987-10-09 | ||
US4763061A (en) * | 1986-05-30 | 1988-08-09 | Braun Aktiengesellschaft | Primary switched-mode DC-DC converter with summed input current and input voltage responsive control |
EP0346478A1 (en) * | 1987-10-29 | 1989-12-20 | Fanuc Ltd. | Switching regulator |
WO2008001890A1 (en) * | 2006-06-30 | 2008-01-03 | Panasonic Electric Works Co., Ltd. | Switching power supply apparatus |
-
1980
- 1980-09-30 JP JP13656980A patent/JPS5762774A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62203561A (en) * | 1986-02-04 | 1987-09-08 | Fujitsu Ltd | Power circuit |
JPS62159189U (en) * | 1986-03-31 | 1987-10-09 | ||
JPH0321194Y2 (en) * | 1986-03-31 | 1991-05-08 | ||
US4763061A (en) * | 1986-05-30 | 1988-08-09 | Braun Aktiengesellschaft | Primary switched-mode DC-DC converter with summed input current and input voltage responsive control |
EP0346478A1 (en) * | 1987-10-29 | 1989-12-20 | Fanuc Ltd. | Switching regulator |
US4942508A (en) * | 1987-10-29 | 1990-07-17 | Fanuc Ltd | Switching regulator |
WO2008001890A1 (en) * | 2006-06-30 | 2008-01-03 | Panasonic Electric Works Co., Ltd. | Switching power supply apparatus |
JP4775441B2 (en) * | 2006-06-30 | 2011-09-21 | パナソニック電工株式会社 | Switching power supply |
US8035998B2 (en) | 2006-06-30 | 2011-10-11 | Panasonic Electric Works Co., Ltd. | Switching power supply |
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