JPH0297889U - - Google Patents
Info
- Publication number
- JPH0297889U JPH0297889U JP499089U JP499089U JPH0297889U JP H0297889 U JPH0297889 U JP H0297889U JP 499089 U JP499089 U JP 499089U JP 499089 U JP499089 U JP 499089U JP H0297889 U JPH0297889 U JP H0297889U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- supply circuit
- control circuit
- circuit
- power
- 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
- 238000004804 winding Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図及び第２図は夫々本考案の一実施例を説
明するための図、第３図は従来回路を説明するた
めの図である。
１……トランス、２……スイツチング素子、３
……制御回路、４……第１の給電回路、４ａ……
トランジスタ、４ｂ……ツエナダイオード、４ｃ
……抵抗、５……第２の給電回路、５ａ……ダイ
オード、５ｂ……コンデンサ、５ｃ……トランジ
スタ、５ｄ……ツエナダイオード、５ｅ……抵抗
、５ｆ……ダイオード、６……出力回路。
1 and 2 are diagrams for explaining an embodiment of the present invention, respectively, and FIG. 3 is a diagram for explaining a conventional circuit. 1...Transformer, 2...Switching element, 3
...Control circuit, 4...First power supply circuit, 4a...
Transistor, 4b...Zena diode, 4c
...Resistor, 5...Second power supply circuit, 5a...Diode, 5b...Capacitor, 5c...Transistor, 5d...Zena diode, 5e...Resistor, 5f...Diode, 6...Output circuit.
Claims (1)
する機能を有する第１の給電回路と、 上記トランスの第３の巻線から上記制御回路に
安定した電圧を供給する機能を有する第２の給電
回路とを備えた電源回路において、 上記第２の給電回路の出力が所定の値未満の場
合には第１の給電回路から制御回路に給電され、
上記第２の給電回路の出力が所定の値以上の場合
には第２の給電回路から制御回路に給電されるよ
うに構成されていることを特徴とする電源回路。[Claims for Utility Model Registration] A switching element, a control circuit for controlling the switching element, a transformer, a first power supply circuit having a function of supplying a stable voltage from an input side to the control circuit, and the transformer. and a second power supply circuit having a function of supplying a stable voltage from the third winding to the control circuit, when the output of the second power supply circuit is less than a predetermined value. Power is supplied to the control circuit from the first power supply circuit,
A power supply circuit characterized in that the power supply circuit is configured such that when the output of the second power supply circuit is equal to or greater than a predetermined value, power is supplied from the second power supply circuit to the control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989004990U JPH0635666Y2 (en) | 1989-01-19 | 1989-01-19 | Power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989004990U JPH0635666Y2 (en) | 1989-01-19 | 1989-01-19 | Power supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0297889U true JPH0297889U (en) | 1990-08-03 |
| JPH0635666Y2 JPH0635666Y2 (en) | 1994-09-14 |
Family
ID=31207980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989004990U Expired - Fee Related JPH0635666Y2 (en) | 1989-01-19 | 1989-01-19 | Power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0635666Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59119789U (en) * | 1983-01-31 | 1984-08-13 | サンケン電気株式会社 | switching regulator |
| JPS60141690U (en) * | 1984-02-27 | 1985-09-19 | 三洋電機株式会社 | Switching regulator starting circuit |
-
1989
- 1989-01-19 JP JP1989004990U patent/JPH0635666Y2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59119789U (en) * | 1983-01-31 | 1984-08-13 | サンケン電気株式会社 | switching regulator |
| JPS60141690U (en) * | 1984-02-27 | 1985-09-19 | 三洋電機株式会社 | Switching regulator starting circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0635666Y2 (en) | 1994-09-14 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |