JPH0425479U - - Google Patents
Info
- Publication number
- JPH0425479U JPH0425479U JP6445490U JP6445490U JPH0425479U JP H0425479 U JPH0425479 U JP H0425479U JP 6445490 U JP6445490 U JP 6445490U JP 6445490 U JP6445490 U JP 6445490U JP H0425479 U JPH0425479 U JP H0425479U
- Authority
- JP
- Japan
- Prior art keywords
- high frequency
- primary side
- voltage
- switching element
- frequency transformer
- 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
- 230000002159 abnormal effect Effects 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000010355 oscillation Effects 0.000 claims 1
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
Description
第１図は本考案の一実施例を示す回路図である
。
２……整流器、３……主平滑コンデンサ、４…
…高周波トランス、５……ダイオード、６……コ
ンデンサ、７……起動用抵抗、９……自励用ドラ
イブ回路、１２，１２′……フオトサイリスタ、
１５……ツエナーダイオード又はアバランシエダ
イオード。
FIG. 1 is a circuit diagram showing an embodiment of the present invention. 2... Rectifier, 3... Main smoothing capacitor, 4...
...High frequency transformer, 5...Diode, 6...Capacitor, 7...Starting resistor, 9...Self-excitation drive circuit, 12, 12'...Photothyristor,
15...Zener diode or avalanche diode.
Claims (1)
側主コイルとスイツチング素子との直列回路に供
給され、前記スイツチング素子が前記高周波トラ
ンスの一次側帰還コイルより電圧が供給され、ブ
ロツキング発振をするように構成され、前記高周
波トランスの二次側コイルに接続された整流回路
に所望の直流出力電圧が取出されるとともに、前
記直流出力電圧の異常上昇を検知し一次側の前記
スイツチング素子の動作の停止手段を備えた自励
式スイツチング型定電圧回路において、前記停止
手段に、非安定直流入力電圧の異常高を検知する
ツエナーダイオード又はアバランシエダイオード
を付加することを特徴とする自励式スイツチング
型定電圧回路。 The unstable DC input voltage is supplied to a series circuit of a primary side main coil of a high frequency transformer and a switching element, and the switching element is configured to be supplied with voltage from the primary side feedback coil of the high frequency transformer to cause blocking oscillation. A desired DC output voltage is taken out to a rectifier circuit connected to the secondary coil of the high frequency transformer, and an abnormal rise in the DC output voltage is detected and a means for stopping the operation of the switching element on the primary side is activated. 1. A self-excited switching type constant voltage circuit comprising: a Zener diode or an avalanche diode for detecting an abnormally high unstable DC input voltage;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6445490U JPH0425479U (en) | 1990-06-20 | 1990-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6445490U JPH0425479U (en) | 1990-06-20 | 1990-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0425479U true JPH0425479U (en) | 1992-02-28 |
Family
ID=31595421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6445490U Pending JPH0425479U (en) | 1990-06-20 | 1990-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0425479U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011120362A (en) * | 2009-12-02 | 2011-06-16 | Tdk Corp | Voltage detection circuit and switching power supply device |
-
1990
- 1990-06-20 JP JP6445490U patent/JPH0425479U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011120362A (en) * | 2009-12-02 | 2011-06-16 | Tdk Corp | Voltage detection circuit and switching power supply device |
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