JPH0461488U - - Google Patents
Info
- Publication number
- JPH0461488U JPH0461488U JP10394590U JP10394590U JPH0461488U JP H0461488 U JPH0461488 U JP H0461488U JP 10394590 U JP10394590 U JP 10394590U JP 10394590 U JP10394590 U JP 10394590U JP H0461488 U JPH0461488 U JP H0461488U
- Authority
- JP
- Japan
- Prior art keywords
- output voltage
- current
- circuit
- detects
- switching
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000009499 grossing Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Control Of Voltage And Current In General (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は本考案の一実施例を示す回路構成図、
第２図は従来例を示す回路構成図である。
２……トランス、３……スイツチング素子、７
……コンデンサ、９……出力電圧検出回路、１６
……フオトカプラ、１６ｂ……ＰＮフオトダイオ
ード、１６ｃ……増幅トランジスタ、１８……ピ
ーク電流制御回路、２０……抵抗（電流検知器）
。
FIG. 1 is a circuit diagram showing an embodiment of the present invention;
FIG. 2 is a circuit configuration diagram showing a conventional example. 2...Transformer, 3...Switching element, 7
... Capacitor, 9 ... Output voltage detection circuit, 16
...Photocoupler, 16b...PN photodiode, 16c...Amplification transistor, 18...Peak current control circuit, 20...Resistor (current detector)
.
Claims (1)
電流検知器と、小容量のコンデンサを用いた平滑
回路と、この平滑回路で平滑された直流出力電圧
を、ＰＮフオトダイオードと増幅用トランジスタ
とをワンチツプに集積化した高速受光素子を有す
るフオトカプラを用いて検出する出力電圧検出回
路と、前記電流検知器と前記出力電圧検出回路と
の出力に基いて前記電流のピーク値を一定に保つ
ようにスイツチング素子のスイツチング時間幅を
制御するピーク電流制御回路とを備えたことを特
徴とするスイツチング電源装置。 A current detector that detects the current on the primary or secondary side of the transformer, a smoothing circuit using a small capacitor, and a DC output voltage smoothed by this smoothing circuit are connected to a PN photodiode and an amplifying transistor. An output voltage detection circuit that detects using a photocoupler having a high-speed light receiving element integrated into one chip, and switching to keep the peak value of the current constant based on the outputs of the current detector and the output voltage detection circuit. 1. A switching power supply device comprising: a peak current control circuit that controls a switching time width of an element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990103945U JP2548025Y2 (en) | 1990-10-01 | 1990-10-01 | Switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990103945U JP2548025Y2 (en) | 1990-10-01 | 1990-10-01 | Switching power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0461488U true JPH0461488U (en) | 1992-05-26 |
| JP2548025Y2 JP2548025Y2 (en) | 1997-09-17 |
Family
ID=31849021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990103945U Expired - Lifetime JP2548025Y2 (en) | 1990-10-01 | 1990-10-01 | Switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2548025Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63191883U (en) * | 1987-05-26 | 1988-12-09 |
-
1990
- 1990-10-01 JP JP1990103945U patent/JP2548025Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63191883U (en) * | 1987-05-26 | 1988-12-09 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2548025Y2 (en) | 1997-09-17 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |