JPS60177682U

JPS60177682U - Switching type stabilized power supply

Info

Publication number: JPS60177682U
Application number: JP6463484U
Authority: JP
Inventors: 江田　忠弘
Original assignee: Ricoh Co Ltd
Current assignee: Ricoh Co Ltd
Priority date: 1984-05-01
Filing date: 1984-05-01
Publication date: 1985-11-26

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

[Brief explanation of the drawing]

第１図は従来の電源装置の負荷電流と出力電圧とめ関係
を示すグラフである。第２ａ図は本考案の一実施例を示
すブロック図、第２ｂ図は第２ａ図に示す回路の動作を
示す波形図、第２ｃ図は第２図ａ図に示す回路の負荷電
流と出力電圧との関係を示すグラフである。第３図、第
４図および第５図は、それぞれ本考案の他の実施例を示
す電気回路図である。１．２：整流回路、３，４：平滑回路（平滑手　　１段
）、５，６：保護回路、７：制御回路（制御手段）、Ｑ
ｌ：トランジスタ（スイッチング手段）、ＡＭＩ：誤差
増幅器（レベル検出手段）、Ｒ，Ｒ゛１ｔＲ２：抵抗器
（擬似負荷手段）、ＺＤ、ＺＤｌ、ｚｏ２；ツェナーダ
イオード。 ■ Ｌ汀 □□□□□□□＋□ −７，１！３　　　−二［１゜」FIG. 1 is a graph showing the relationship between load current and output voltage of a conventional power supply device. Figure 2a is a block diagram showing an embodiment of the present invention, Figure 2b is a waveform diagram showing the operation of the circuit shown in Figure 2a, and Figure 2c is the load current and output voltage of the circuit shown in Figure 2a. It is a graph showing the relationship between 3, 4 and 5 are electrical circuit diagrams showing other embodiments of the present invention, respectively. 1.2: Rectifier circuit, 3, 4: Smoothing circuit (smoothing 1 stage), 5, 6: Protection circuit, 7: Control circuit (control means), Q
l: transistor (switching means), AMI: error amplifier (level detection means), R, R゛1tR2: resistor (pseudo load means), ZD, ZDl, zo2: Zener diode. ■ L □□□□□□□＋□ −7 ,1!3 −2 [1°”

Claims

[Scope of utility model registration request]

(1) At least one switching means for controlling on/off the current from the DC power supply, a smoothing means for smoothing the alternating current obtained at the output of the switching means, and an output level for detecting the level of the output of the smoothing means. A switching saint, comprising: a detection means; and a control means for adjusting the control timing of the switching means according to the detected value of the output level detection means to maintain the output voltage at a set value;
In an electrification power supply device: A switching type stabilized power supply device comprising: a pseudo load means for passing a current in parallel with a load; and an energization control means for detecting an output voltage and controlling energization of the pseudo load means when the output voltage is equal to or higher than a predetermined value. .

(2) The switching type stabilized power supply device according to claim (1), wherein the energization control means includes at least one constant voltage element.

(3) The switching type stabilized power supply device according to claim (2), wherein the energization control means includes current amplification means for amplifying the current of the constant voltage element.