JPS63202183U - - Google Patents
Info
- Publication number
- JPS63202183U JPS63202183U JP9442487U JP9442487U JPS63202183U JP S63202183 U JPS63202183 U JP S63202183U JP 9442487 U JP9442487 U JP 9442487U JP 9442487 U JP9442487 U JP 9442487U JP S63202183 U JPS63202183 U JP S63202183U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- control circuit
- switching element
- switching
- circuit
- 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
- 238000003079 width control Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は本考案の一実施例による回路構成図、
第２図は従来のスイツチング電源回路の構成図で
ある。
Ｅ０は直流入力電源、１は平滑用コンデンサ、
２はスイツチング素子、３はスイツチングトラン
ス、３１は一次側巻線、３２は二次側巻線、４は
平滑回路、５は負荷、Ｅは直流出力、６は定電圧
制御回路、７は過電圧検出回路、８，９はパルス
幅制御回路、１０はスナバ回路、１１は電源供給
部、１２はサイリスタ素子、１１１は抵抗、１１
２はツエナーダイオード、１１３はトランジスタ
素子、ｉ１はベース電流、ｉ２はエミツタ電流。
FIG. 1 is a circuit configuration diagram according to an embodiment of the present invention,
FIG. 2 is a block diagram of a conventional switching power supply circuit. E 0 is DC input power supply, 1 is smoothing capacitor,
2 is a switching element, 3 is a switching transformer, 31 is a primary winding, 32 is a secondary winding, 4 is a smoothing circuit, 5 is a load, E is a DC output, 6 is a constant voltage control circuit, 7 is an overvoltage Detection circuit, 8 and 9 are pulse width control circuits, 10 is a snubber circuit, 11 is a power supply section, 12 is a thyristor element, 111 is a resistor, 11
2 is a Zener diode, 113 is a transistor element, i1 is a base current, and i2 is an emitter current.
Claims (1)
とスイツチング素子とを接続し、前記スイツチン
グトランスの二次側の直流出力電圧を定電圧制御
回路を介して検出し、この定電圧制御回路の出力
信号に応じて、前記スイツチング素子のオン、オ
フ比を制御するパルス幅制御回路と、前記直流出
力が過電圧となつた場合、パルス幅制御回路のパ
ルス発生を停止するための過電圧検出回路と、前
記パルス幅制御回路に電力を供給するための電源
供給部を備えたスイツチング電源回路において、
前記電源供給部のトランジスタのベースと前記直
流入力電源の負極間にバイパス用スイツチング素
子を接続し、このスイツチング素子を前記過電圧
検出回路の出力信号にてオンするよう構成したこ
とを特徴とするスイツチング電源回路。 A switching transformer and a switching element are connected in series with a DC input power supply, the DC output voltage on the secondary side of the switching transformer is detected via a constant voltage control circuit, and the output signal of the constant voltage control circuit is Accordingly, a pulse width control circuit that controls the on/off ratio of the switching element, an overvoltage detection circuit that stops pulse generation of the pulse width control circuit when the DC output becomes an overvoltage, and a pulse width detection circuit that controls the pulse width of the switching element. In a switching power supply circuit equipped with a power supply section for supplying power to a control circuit,
A switching power supply characterized in that a bypass switching element is connected between the base of the transistor of the power supply section and the negative electrode of the DC input power supply, and the switching element is turned on by the output signal of the overvoltage detection circuit. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9442487U JPS63202183U (en) | 1987-06-19 | 1987-06-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9442487U JPS63202183U (en) | 1987-06-19 | 1987-06-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63202183U true JPS63202183U (en) | 1988-12-27 |
Family
ID=30957872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9442487U Pending JPS63202183U (en) | 1987-06-19 | 1987-06-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63202183U (en) |
-
1987
- 1987-06-19 JP JP9442487U patent/JPS63202183U/ja active Pending