JPH0321985U - - Google Patents
Info
- Publication number
- JPH0321985U JPH0321985U JP8193489U JP8193489U JPH0321985U JP H0321985 U JPH0321985 U JP H0321985U JP 8193489 U JP8193489 U JP 8193489U JP 8193489 U JP8193489 U JP 8193489U JP H0321985 U JPH0321985 U JP H0321985U
- Authority
- JP
- Japan
- Prior art keywords
- duty
- control means
- detection means
- power supply
- supply circuit
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は実施例のスイツチング電源回路を示す
図、第２図は従来のスイツチング電源回路を示す
図である。
Ｒ２，Ｒ３……抵抗（デユーテイ検出手段）、
ＰＣ２……フオトカプラ（デユーテイ検出手段）
、Ｒ４，Ｃ３……第１積分回路（デユーテイ検出
手段）、Ｒ５，Ｃ４……第２積分回路（デユーテ
イ検出手段）、ＩＣ１……オペアンプ（制御手段
）、Ｄ３……ツエナーダイオード（制御手段）、
Ｒ７，Ｒ８，Ｒ９……抵抗（制御手段）、Ｔｒ２
……トランジスタ（制御手段）。
FIG. 1 is a diagram showing a switching power supply circuit according to an embodiment, and FIG. 2 is a diagram showing a conventional switching power supply circuit. R 2 , R 3 ...Resistance (duty detection means),
PC 2 ...Photocoupler (duty detection means)
, R 4 , C 3 .... first integration circuit (duty detection means), R 5 , C 4 .... second integration circuit (duty detection means), IC 1 .... operational amplifier (control means), D 3 .... Zener Diode (control means),
R 7 , R 8 , R 9 ...Resistance (control means), Tr 2
...Transistor (control means).
Claims (1)
ユーテイ検出手段と、前記デユーテイの変化に応
じてダミー抵抗に流れる電流を制御する制御手段
とを備えることを特徴とするスイツチング電源回
路。 1. A switching power supply circuit comprising: duty detection means for detecting the duty of a switching pulse; and control means for controlling a current flowing through a dummy resistor in accordance with a change in the duty.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8193489U JPH0321985U (en) | 1989-07-11 | 1989-07-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8193489U JPH0321985U (en) | 1989-07-11 | 1989-07-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0321985U true JPH0321985U (en) | 1991-03-06 |
Family
ID=31628306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8193489U Pending JPH0321985U (en) | 1989-07-11 | 1989-07-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0321985U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59191477A (en) * | 1983-04-11 | 1984-10-30 | Hitachi Lighting Ltd | Dc stabilized power source |
-
1989
- 1989-07-11 JP JP8193489U patent/JPH0321985U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59191477A (en) * | 1983-04-11 | 1984-10-30 | Hitachi Lighting Ltd | Dc stabilized power source |