JPS59117290U - Inrush current prevention circuit - Google Patents
Inrush current prevention circuitInfo
- Publication number
- JPS59117290U JPS59117290U JP957083U JP957083U JPS59117290U JP S59117290 U JPS59117290 U JP S59117290U JP 957083 U JP957083 U JP 957083U JP 957083 U JP957083 U JP 957083U JP S59117290 U JPS59117290 U JP S59117290U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- resistor
- inrush current
- prevention circuit
- current prevention
- 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
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図は従来のこの種装置の一例を示す回路図、第２図
は本考案突入電流防止回路の一実施例を示す回路図、第
３図は第１図に示した回路におけるコンデンサへの入力
電流の大きさを示す図、第４図は第２図に示した本考案
の実施例におけるコンデンサへの入力電流の大きさを示
す図である。
５・・・コンデンサ、６・・・スイッチングレギュレー
タ回路、８・・・トランジスタ、９．１２・・・抵抗、
・１０．１１・・・ダイオード。Fig. 1 is a circuit diagram showing an example of a conventional device of this type, Fig. 2 is a circuit diagram showing an embodiment of the inrush current prevention circuit of the present invention, and Fig. 3 is a circuit diagram showing an example of the inrush current prevention circuit of the present invention. FIG. 4 is a diagram showing the magnitude of the input current to the capacitor in the embodiment of the present invention shown in FIG. 2. 5... Capacitor, 6... Switching regulator circuit, 8... Transistor, 9.12... Resistor,
・10.11...Diode.
Claims (1)
列に、抵抗とトランジスタの直列回路を該コンデンサを
充電する方向に接続し、前記抵抗とトランジスタの直列
回路と並列にトランジスタの電流方向と逆方向の極性に
ダイオードを接続し、前記トランジスタのベースにバイ
アスをかけるダイオードとベース電流を流す抵抗を接続
し、通常時には前記トランジスタをオン状態に保ち、前
記コンデンサの突入電流発生時のみ、トランジスタがオ
フ状態となることを特徴とする突入電流防止回路。A series circuit of a resistor and a transistor is connected in series with a smoothing capacitor of a rectifier circuit directly connected to an AC power supply in a direction that charges the capacitor, and a series circuit of a resistor and a transistor is connected in a direction opposite to the current direction of the transistor in parallel with the series circuit of the resistor and transistor. A diode is connected to the polarity, and a diode that applies a bias to the base of the transistor is connected to a resistor that allows the base current to flow, so that the transistor is normally kept in the on state, and only when the inrush current of the capacitor occurs, the transistor is turned off. An inrush current prevention circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP957083U JPS59117290U (en) | 1983-01-26 | 1983-01-26 | Inrush current prevention circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP957083U JPS59117290U (en) | 1983-01-26 | 1983-01-26 | Inrush current prevention circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59117290U true JPS59117290U (en) | 1984-08-08 |
Family
ID=30141027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP957083U Pending JPS59117290U (en) | 1983-01-26 | 1983-01-26 | Inrush current prevention circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59117290U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5222745A (en) * | 1975-08-13 | 1977-02-21 | Teruo Hirano | Dc power source circuit |
| JPS5339305U (en) * | 1976-09-08 | 1978-04-06 |
-
1983
- 1983-01-26 JP JP957083U patent/JPS59117290U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5222745A (en) * | 1975-08-13 | 1977-02-21 | Teruo Hirano | Dc power source circuit |
| JPS5339305U (en) * | 1976-09-08 | 1978-04-06 |
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