JPS5990288U - power circuit - Google Patents
power circuitInfo
- Publication number
- JPS5990288U JPS5990288U JP18631182U JP18631182U JPS5990288U JP S5990288 U JPS5990288 U JP S5990288U JP 18631182 U JP18631182 U JP 18631182U JP 18631182 U JP18631182 U JP 18631182U JP S5990288 U JPS5990288 U JP S5990288U
- Authority
- JP
- Japan
- Prior art keywords
- switching element
- voltage
- pulse width
- width modulation
- signal
- 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
- Details Of Television Scanning (AREA)
- Dc-Dc Converters (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案電源回路の一実施例を示す構成図、第２
図は第１図の説明に供する線図であ乏。
２は商用電源、４は整流回路、１１は比較回路、１４ａ
、１５及び２゛８は夫々抵抗器、１６はコンパレータ、
１７は鋸歯状波信号発生回路、′２５゜３３．３５及び
３８は夫々トランジスタ、３０は 、直流電圧出力
端子、３２は可変抵抗器である。Figure 1 is a configuration diagram showing one embodiment of the power supply circuit of the present invention;
The diagram is insufficient to provide a diagram for explaining FIG. 1. 2 is a commercial power supply, 4 is a rectifier circuit, 11 is a comparison circuit, 14a
, 15 and 2'8 are resistors respectively, 16 is a comparator,
Reference numeral 17 is a sawtooth wave signal generation circuit, reference numerals 35 and 38 are transistors, respectively, reference numeral 30 is a DC voltage output terminal, and reference numeral 32 is a variable resistor.
Claims (1)
を得、該パルス幅変調信号により第１のスイッチング素
子を制御して直流入力電圧をチョッピングし、該チョッ
ピングされた電圧を整流して出力直流電圧を得る様にし
た電源回路に於いて、上記比較信号のレベルを決定する
抵抗器の両端間に第２のスイッチング素子を接続し、上
記出力直流電圧が異常なときに該第２のスイッチング素
子をオンとし上記比較信号のレベルを増大し、上記パル
ス幅変調信号を上記第１のスイッチング素子がオフ状態
となる様にしたことを特徴とする電源回路。A pulse width modulation signal is obtained by comparing the sawtooth wave signal and the comparison signal, the first switching element is controlled by the pulse width modulation signal to chop the DC input voltage, and the chopped voltage is rectified. In a power supply circuit configured to obtain an output DC voltage, a second switching element is connected between both ends of the resistor that determines the level of the comparison signal, and when the output DC voltage is abnormal, the second switching element is switched on. A power supply circuit characterized in that a switching element is turned on to increase the level of the comparison signal, and the pulse width modulation signal is caused to turn off the first switching element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18631182U JPS5990288U (en) | 1982-12-09 | 1982-12-09 | power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18631182U JPS5990288U (en) | 1982-12-09 | 1982-12-09 | power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5990288U true JPS5990288U (en) | 1984-06-19 |
Family
ID=30402457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18631182U Pending JPS5990288U (en) | 1982-12-09 | 1982-12-09 | power circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5990288U (en) |
-
1982
- 1982-12-09 JP JP18631182U patent/JPS5990288U/en active Pending
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