JPS5586378A - Switching device for power supply - Google Patents
Switching device for power supplyInfo
- Publication number
- JPS5586378A JPS5586378A JP16426278A JP16426278A JPS5586378A JP S5586378 A JPS5586378 A JP S5586378A JP 16426278 A JP16426278 A JP 16426278A JP 16426278 A JP16426278 A JP 16426278A JP S5586378 A JPS5586378 A JP S5586378A
- Authority
- JP
- Japan
- Prior art keywords
- base
- transistor
- current
- circuit
- voltage
- 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.)
- Granted
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
PURPOSE: To obtain a stable output voltage independently of the fluctuation in an input, a load or the like, by providing a constant current circuit for controlling the base current of a switching transistor, in a base driving circuit for the transistor which constitutes an oscillation circuit.
CONSTITUTION: When an input voltage V1 fluctuates, a voltage induced in the feedback winding L3 of a transformer T changes. As a result, the base voltage V3 and base current I3 of a switching transistor Q1 vary. Since a constant current circuit CC is contained in a base driving circuit, the base current I3 can be controlled almost constant even if the base current varies during the closing of the switching transistor. Therefore, the transistor can be driven without supplying an excessive base current to the base of the transistor. This results in holding the base driving power down and improving the power supply efficiency.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16426278A JPS5840917B2 (en) | 1978-12-22 | 1978-12-22 | switching power supply |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16426278A JPS5840917B2 (en) | 1978-12-22 | 1978-12-22 | switching power supply |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5586378A true JPS5586378A (en) | 1980-06-30 |
JPS5840917B2 JPS5840917B2 (en) | 1983-09-08 |
Family
ID=15789738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16426278A Expired JPS5840917B2 (en) | 1978-12-22 | 1978-12-22 | switching power supply |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5840917B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS592570A (en) * | 1982-06-25 | 1984-01-09 | Sanyo Electric Co Ltd | Switching control type power source circuit |
JPS6077292U (en) * | 1983-10-31 | 1985-05-30 | 北陸電気工業株式会社 | DC-DC converter |
JPS61153085U (en) * | 1985-03-13 | 1986-09-22 | ||
JPH06222765A (en) * | 1993-12-28 | 1994-08-12 | Yamaha Corp | Electronic musical instrument |
-
1978
- 1978-12-22 JP JP16426278A patent/JPS5840917B2/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS592570A (en) * | 1982-06-25 | 1984-01-09 | Sanyo Electric Co Ltd | Switching control type power source circuit |
JPH028550B2 (en) * | 1982-06-25 | 1990-02-26 | Sanyo Electric Co | |
JPS6077292U (en) * | 1983-10-31 | 1985-05-30 | 北陸電気工業株式会社 | DC-DC converter |
JPH0127428Y2 (en) * | 1983-10-31 | 1989-08-16 | ||
JPS61153085U (en) * | 1985-03-13 | 1986-09-22 | ||
JPH06222765A (en) * | 1993-12-28 | 1994-08-12 | Yamaha Corp | Electronic musical instrument |
Also Published As
Publication number | Publication date |
---|---|
JPS5840917B2 (en) | 1983-09-08 |
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