JPH0350980U - - Google Patents
Info
- Publication number
- JPH0350980U JPH0350980U JP11122989U JP11122989U JPH0350980U JP H0350980 U JPH0350980 U JP H0350980U JP 11122989 U JP11122989 U JP 11122989U JP 11122989 U JP11122989 U JP 11122989U JP H0350980 U JPH0350980 U JP H0350980U
- Authority
- JP
- Japan
- Prior art keywords
- switching element
- transistor
- output
- circuit
- resistor
- 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 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
従来のスイツチング電源の一例の回路図である。
１，２８……トランス、２，２９……ＦＥＴ、
３，３０……トランジスタ、４，９，３１，３６
……コイル、１０〜１２，３７〜３９……コンデ
ンサ、１３，４０……オペアンプ、１４，４１…
…コントロールＩＣ、１５〜２４，４２〜５１…
…抵抗器、２５，５２……負荷、２６，５３……
垂下回路、２７，５４……基準電源。
FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a circuit diagram of an example of a conventional switching power supply. 1,28...Transformer, 2,29...FET,
3, 30...transistor, 4, 9, 31, 36
...Coil, 10-12, 37-39...Capacitor, 13,40...Operational amplifier, 14,41...
...Control IC, 15-24, 42-51...
...Resistor, 25,52...Load, 26,53...
Drooping circuit, 27, 54...Reference power supply.
Claims (1)
源を制御パルスに応じて断続するスイツチング素
子と、前記トランスの出力巻線からの電圧と基準
電圧とに応じたパルス幅の前記制御パルスを発生
する制御回路とを備えたスイツチング電源におい
て、前記スイツチング素子に流れる電流に応じて
前記基準電圧を変える垂下回路とを有することを
特徴とするスイツチング電源。 (2) 前記垂下回路において、前記スイツチング
素子に流れる電流を検出する抵抗器と、この抵抗
器に発生した電圧を増幅するトランジスタと、こ
のトランジスタの出力を前記制御回路に供給する
ことを特徴とする請求項(1)記載のスイツチング
電源。[Claims for Utility Model Registration] (1) A switching element that switches on and off the power applied through the input winding of the transformer according to control pulses, and a switching element that switches on and off the power applied through the input winding of the transformer according to the voltage from the output winding of the transformer and a reference voltage. A switching power supply comprising: a control circuit that generates the control pulse with a pulse width of a given width; and a drooping circuit that changes the reference voltage in accordance with a current flowing through the switching element. (2) The drooping circuit is characterized in that it includes a resistor that detects the current flowing through the switching element, a transistor that amplifies the voltage generated in the resistor, and an output of this transistor that supplies the output of the transistor to the control circuit. The switching power supply according to claim (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11122989U JPH0350980U (en) | 1989-09-22 | 1989-09-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11122989U JPH0350980U (en) | 1989-09-22 | 1989-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0350980U true JPH0350980U (en) | 1991-05-17 |
Family
ID=31659721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11122989U Pending JPH0350980U (en) | 1989-09-22 | 1989-09-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0350980U (en) |
-
1989
- 1989-09-22 JP JP11122989U patent/JPH0350980U/ja active Pending