JPS645353A - Dc-dc converter - Google Patents
Dc-dc converterInfo
- Publication number
- JPS645353A JPS645353A JP15704387A JP15704387A JPS645353A JP S645353 A JPS645353 A JP S645353A JP 15704387 A JP15704387 A JP 15704387A JP 15704387 A JP15704387 A JP 15704387A JP S645353 A JPS645353 A JP S645353A
- Authority
- JP
- Japan
- Prior art keywords
- output
- trs
- transformer
- current
- turned
- 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
Landscapes
- Dc-Dc Converters (AREA)
Abstract
PURPOSE:To reduce a surge current by controlling the switching voltage of a switching transistor according to a second DC output converted from the secondary side of a transformer. CONSTITUTION:A DC-DC voltage conversion power circuit is composed of a rectangular wave oscillator 1, push-pull connected power-driven transistors (Tr) 6-7, a transformer 10, a rectifier 3 on the secondary winding side of said transformer and others, and is equipped with an audio amplifier 2 and a speaker 4a connected with an output terminal 4. Then, the output of said output terminal 4 is applied to the base of a Tr 18 via a rectifier circuit 20 and voltage dividing resistors 21-22 and supplied from the collector of said Tr 18 to the bases of Trs 13-14. Thus, when the output of said amplifier 2 is more than a given level, the Tr 18 is turned ON while the Trs 13-14 are turned OFF so that the base current of the Trs 6-7 is supplied sufficiently. Likewise, when the output is less than said given level, the base current of the Trs 6-7 is decreased so that an unwanted current is reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15704387A JPS645353A (en) | 1987-06-24 | 1987-06-24 | Dc-dc converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15704387A JPS645353A (en) | 1987-06-24 | 1987-06-24 | Dc-dc converter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS645353A true JPS645353A (en) | 1989-01-10 |
Family
ID=15640945
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15704387A Pending JPS645353A (en) | 1987-06-24 | 1987-06-24 | Dc-dc converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS645353A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS553897A (en) * | 1978-06-22 | 1980-01-11 | Lenox Inst Res | Waste water purifier |
-
1987
- 1987-06-24 JP JP15704387A patent/JPS645353A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS553897A (en) * | 1978-06-22 | 1980-01-11 | Lenox Inst Res | Waste water purifier |
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