JPH02125586U - - Google Patents
Info
- Publication number
- JPH02125586U JPH02125586U JP3322989U JP3322989U JPH02125586U JP H02125586 U JPH02125586 U JP H02125586U JP 3322989 U JP3322989 U JP 3322989U JP 3322989 U JP3322989 U JP 3322989U JP H02125586 U JPH02125586 U JP H02125586U
- Authority
- JP
- Japan
- Prior art keywords
- detection
- output
- switching
- transistor
- switching regulator
- 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 11
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は本考案によるスイツチングレギユレー
タの一実施例を示す回路図、第２図は従来のスイ
ツチングレギユレータの回路図である。
１……商用交流電源、２……整流用ダイオード
ブリツジ、４……コンバータトランス、５，１６
……一次巻線、６……スイツチング用出力トラン
ジスタ、１１……検出用トランジスタ、１２……
検出用抵抗、１２……起動用抵抗、１３，１５…
…起動用コンデンサ、１４……ドライブ用抵抗、
１７……制御用トランジスタ、１８，１９……基
準電圧用抵抗、２０……整流用ダイオード、２２
……検出用トランジスタ、２３……基準電圧用ツ
エナダイオード、２４……ツエナ電流用抵抗、２
５，２６……二次巻線、２７……電流増幅用トラ
ンジスタ、２９……フオトカプラ、２９Ａ……発
光ダイオード、２９Ｂ……フオトトランジスタ、
Ｃ１，Ｃ２，Ｃ３，…，Ｃｎ……平滑用コンデン
サ、Ｄ１，Ｄ２，Ｄ３，…，Ｄｎ……整流用ダイ
オード、Ｌ１，Ｌ２，Ｌ３，…，Ｌｎ……負荷、
Ｒ１，Ｒ２，Ｒ３，…，Ｒｎ……検出用抵抗、Ｔ
ｒ１，Ｔｒ２，Ｔｒ３，…，Ｔｒｎ……検出用ト
ランジスタ。
FIG. 1 is a circuit diagram showing an embodiment of a switching regulator according to the present invention, and FIG. 2 is a circuit diagram of a conventional switching regulator. 1... Commercial AC power supply, 2... Rectifying diode bridge, 4... Converter transformer, 5, 16
...Primary winding, 6...Output transistor for switching, 11...Transistor for detection, 12...
Detection resistor, 12... Starting resistor, 13, 15...
...starting capacitor, 14...drive resistor,
17... Control transistor, 18, 19... Reference voltage resistor, 20... Rectifier diode, 22
...Transistor for detection, 23...Zena diode for reference voltage, 24...Resistor for Zena current, 2
5, 26... Secondary winding, 27... Current amplification transistor, 29... Photo coupler, 29A... Light emitting diode, 29B... Photo transistor,
C1, C2, C3,..., Cn... Smoothing capacitor, D1, D2, D3,..., Dn... Rectifying diode, L1, L2, L3,..., Ln... Load,
R1, R2, R3,..., Rn...Detection resistor, T
r1, Tr2, Tr3,..., Trn...detection transistors.
Claims (1)
ング出力トランジスタによつて二次側の複数の出
力を制御する一次制御式多出力のスイツチングレ
ギユレータにおいて、二次側の各出力毎に設けら
れ各出力の過電流をそれぞれ検出する検出用抵抗
と、上記各出力毎に設けられ各出力の過電流時に
これら検出用抵抗の検出電圧により動作する検出
用トランジスタとを備え、これら検出用トランジ
スタの検出出力に基づいて上記スイツチング出力
トランジスタのベース電流を制御して、上記各出
力の過電流保護を行なうことを特徴とするスイツ
チングレギユレータ。 In a primary control type multi-output switching regulator that controls multiple outputs on the secondary side by a switching output transistor provided on the primary side of the converter transformer, a switching regulator is provided for each output on the secondary side and It is equipped with a detection resistor that detects each overcurrent, and a detection transistor that is provided for each of the above outputs and is operated by the detection voltage of these detection resistors when an overcurrent of each output occurs, and based on the detection output of these detection transistors. The switching regulator is characterized in that the base current of the switching output transistor is controlled by the switching output transistor to provide overcurrent protection for each of the outputs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3322989U JPH02125586U (en) | 1989-03-27 | 1989-03-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3322989U JPH02125586U (en) | 1989-03-27 | 1989-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02125586U true JPH02125586U (en) | 1990-10-16 |
Family
ID=31536724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3322989U Pending JPH02125586U (en) | 1989-03-27 | 1989-03-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02125586U (en) |
-
1989
- 1989-03-27 JP JP3322989U patent/JPH02125586U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6238089U (en) | ||
| JP2577466Y2 (en) | Power supply | |
| JPH03124216U (en) | ||
| JPH0468486U (en) | ||
| JPS5930626Y2 (en) | switching regulator | |
| JPH0360878U (en) | ||
| JPS6233686U (en) | ||
| JPS6445494U (en) | ||
| JPH01131291U (en) | ||
| JPH03111181U (en) | ||
| JPH0360882U (en) | ||
| JPS6132787U (en) | flyback converter | |
| JPH02125535U (en) | ||
| JPH0279185U (en) | ||
| JPS62178787U (en) | ||
| JPS63100994U (en) | ||
| JPS6363092U (en) | ||
| JPH0326284U (en) | ||
| JPH0279187U (en) | ||
| JPS61123687U (en) | ||
| JPH03107725U (en) | ||
| JPS63153783U (en) | ||
| JPH0196782U (en) | ||
| JPS6233685U (en) | ||
| JPH0314988U (en) |