JPH0321982U - - Google Patents
Info
- Publication number
- JPH0321982U JPH0321982U JP8170389U JP8170389U JPH0321982U JP H0321982 U JPH0321982 U JP H0321982U JP 8170389 U JP8170389 U JP 8170389U JP 8170389 U JP8170389 U JP 8170389U JP H0321982 U JPH0321982 U JP H0321982U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- switching
- starting
- power supply
- closes
- 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
- 238000004804 winding Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は本考案のスイツチング電源の起動回路
の一実施例を示したブロツク図、第２図は第１図
に示したコンデンサ１０の両端電圧特性例を示し
た図、第３図は従来のスイツチング電源の起動回
路の一例を示したブロツク図、第４図は第３図に
示したコンデンサ１０の両端電圧及び２次巻線側
電圧の特性例を示した図である。
１，１５……トランジスタ、２……リレー、３
……商用電源、４……整流回路、５，１０，１３
，１４……コンデンサ、６……トランス、７……
ドライブ回路、８……ＦＥＴ、９，１１，１２…
…ダイオード、Ｒ１……起動抵抗。
Fig. 1 is a block diagram showing an embodiment of the starting circuit of the switching power supply of the present invention, Fig. 2 is a diagram showing an example of the voltage characteristics across the capacitor 10 shown in Fig. FIG. 4 is a block diagram showing an example of a starting circuit of a switching power supply. FIG. 4 is a diagram showing an example of characteristics of the voltage across the capacitor 10 shown in FIG. 3 and the voltage on the secondary winding side. 1, 15...Transistor, 2...Relay, 3
... Commercial power supply, 4 ... Rectifier circuit, 5, 10, 13
, 14... Capacitor, 6... Transformer, 7...
Drive circuit, 8...FET, 9, 11, 12...
...Diode, R1 ...Starting resistance.
Claims (1)
を介して電圧を供給することによつて、前記ＦＥ
Ｔをスイツチングさせることによりトランスの一
次巻線に交番電流を発生させるスイツチング電源
の起動回路において、前記起動抵抗とＦＥＴのド
ライブ回路間を閉路、開路するスイツチング回路
と、前記電源オン時に前記スイツチ回路を閉路さ
せ、前記電源オフ時に前記スイツチ回路を開路さ
せる制御手段とを具備したことを特徴とするスイ
ツチング電源の起動回路。 When the power is turned on, the FE
A starting circuit of a switching power supply that generates an alternating current in the primary winding of a transformer by switching T, includes a switching circuit that closes and opens a circuit between the starting resistor and the FET drive circuit, and a switching circuit that closes and opens the circuit between the starting resistor and the FET drive circuit, and the switching circuit that closes and opens the circuit between the starting resistor and the FET drive circuit. 1. A starting circuit for a switching power supply, comprising control means for closing the switch circuit and opening the switch circuit when the power supply is turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8170389U JPH0321982U (en) | 1989-07-13 | 1989-07-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8170389U JPH0321982U (en) | 1989-07-13 | 1989-07-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0321982U true JPH0321982U (en) | 1991-03-06 |
Family
ID=31627876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8170389U Pending JPH0321982U (en) | 1989-07-13 | 1989-07-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0321982U (en) |
-
1989
- 1989-07-13 JP JP8170389U patent/JPH0321982U/ja active Pending