JPH0241689U - - Google Patents
Info
- Publication number
- JPH0241689U JPH0241689U JP11864288U JP11864288U JPH0241689U JP H0241689 U JPH0241689 U JP H0241689U JP 11864288 U JP11864288 U JP 11864288U JP 11864288 U JP11864288 U JP 11864288U JP H0241689 U JPH0241689 U JP H0241689U
- Authority
- JP
- Japan
- Prior art keywords
- control circuit
- power supply
- switching
- triac
- series
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 230000002457 bidirectional effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Dc-Dc Converters (AREA)
- Electronic Switches (AREA)
Description
第１図は本考案による第１の実施例を示す回路
図であり、第２図は第２の実施例を示す回路図で
ある。第３図は従来技術による回路図であり、第
４図はトライアツクがオフする際のトリガモード
の電位関係を示す図である。
１……パルス幅変調回路、２……スイツチング
制御回路、３……スイツチング電源トランス、４
……過電流検出回路、５……過電圧保護用制御回
路、６……トライアツク、７……インバータ、８
……出力電圧変動検出回路。
FIG. 1 is a circuit diagram showing a first embodiment of the present invention, and FIG. 2 is a circuit diagram showing a second embodiment. FIG. 3 is a circuit diagram according to the prior art, and FIG. 4 is a diagram showing the potential relationship in the trigger mode when the triac is turned off. 1... Pulse width modulation circuit, 2... Switching control circuit, 3... Switching power transformer, 4
...Overcurrent detection circuit, 5...Overvoltage protection control circuit, 6...Triack, 7...Inverter, 8
...Output voltage fluctuation detection circuit.
Claims (1)
１および第２のトランジスタを備えスイツチング
制御信号を出力するスイツチング制御回路と、前
記スイツチング制御信号をゲート電極に入力して
オン・オフするＭＯＳ型ＦＥＴとを具備したスイ
ツチング電源制御回路において、前記スイツチン
グ制御回路の直列接続されたトランジスタの出力
端と前記ＭＯＳ型ＦＥＴのゲート電極間に、該Ｍ
ＯＳ型ＦＥＴのソース電極に直列に接続した過電
流検出抵抗と定電圧ダイオードとコンパレータと
を有して構成される過電流検出回路及び高耐圧を
有する双方向サイリスタ（以下トライアツクと呼
ぶ）と該トライアツクの主電流調整用の抵抗とト
ランジスタから構成される過電圧保護用制御回路
を配置したことを特徴とするスイツチング電源制
御回路。 a switching control circuit that includes first and second transistors connected in series between first and second power supply terminals and outputs a switching control signal; and a MOS that inputs the switching control signal to a gate electrode to turn it on and off. In a switching power supply control circuit comprising a MOS type FET, the M
An overcurrent detection circuit comprising an overcurrent detection resistor, a constant voltage diode, and a comparator connected in series to the source electrode of an OS type FET, a bidirectional thyristor (hereinafter referred to as a triac) having a high withstand voltage, and the triac. A switching power supply control circuit characterized in that an overvoltage protection control circuit consisting of a main current adjustment resistor and a transistor is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11864288U JPH0241689U (en) | 1988-09-08 | 1988-09-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11864288U JPH0241689U (en) | 1988-09-08 | 1988-09-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0241689U true JPH0241689U (en) | 1990-03-22 |
Family
ID=31363166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11864288U Pending JPH0241689U (en) | 1988-09-08 | 1988-09-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0241689U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07255168A (en) * | 1994-01-05 | 1995-10-03 | Samsung Electron Co Ltd | Dc-dc converter for generating a plurality of signals |
| JP2014216756A (en) * | 2013-04-24 | 2014-11-17 | ニチコン株式会社 | Overcurrent detection device |
-
1988
- 1988-09-08 JP JP11864288U patent/JPH0241689U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07255168A (en) * | 1994-01-05 | 1995-10-03 | Samsung Electron Co Ltd | Dc-dc converter for generating a plurality of signals |
| JP2014216756A (en) * | 2013-04-24 | 2014-11-17 | ニチコン株式会社 | Overcurrent detection device |
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