JPH0169382U - - Google Patents
Info
- Publication number
- JPH0169382U JPH0169382U JP1987163526U JP16352687U JPH0169382U JP H0169382 U JPH0169382 U JP H0169382U JP 1987163526 U JP1987163526 U JP 1987163526U JP 16352687 U JP16352687 U JP 16352687U JP H0169382 U JPH0169382 U JP H0169382U
- Authority
- JP
- Japan
- Prior art keywords
- fet
- tertiary winding
- converter
- pwm control
- control 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.)
- Granted
Links
- 238000009499 grossing Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は本考案の一実施例を示す構成図、第２
図は第１図の動作説明に供する各部の波形図であ
る。
１……直流電源、２……変成器、３……主スイ
ツチ、４……整流平滑回路、５……ＰＷＭ制御回
路、６……パルストランス、７……ＦＥＴスイツ
チ、８……平滑回路、９……ＰＷＭ制御回路、１
０……フオトカプラ。
Fig. 1 is a configuration diagram showing one embodiment of the present invention;
The figure is a waveform diagram of each part used to explain the operation of FIG. 1. 1... DC power supply, 2... Transformer, 3... Main switch, 4... Rectifier smoothing circuit, 5... PWM control circuit, 6... Pulse transformer, 7... FET switch, 8... Smoothing circuit, 9...PWM control circuit, 1
0...Photocoupler.
Claims (1)
ＰＷＭ制御回路でクロツク信号に変換しパルスト
ランスを介して主スイツチをオンオフする第１の
コンバータと、この第１のコンバータの主トラン
スに３次巻線を設けこの３次巻線に直列に設けた
ＦＥＴスイツチと平滑回路からなる第２のコンバ
ータと、前記パルストランスに３次巻線を設けこ
の３次巻線の一端を前記ＦＥＴスイツチのソース
に接続し他端をフオトカプラの２次側を介して該
ＦＥＴスイツチのゲートに接続したＦＥＴ駆動回
路と、前記第１のＰＷＭ制御回路と同期し前記第
２のコンバータの出力電圧を検出しクロツク信号
に変換する第２のＰＷＭ制御回路とを備え、この
第２のＰＷＭ制御回路の出力を前記フオトカプラ
の１次側に接続したことを特徴とするＦＥＴ整流
を用いた多出力電源装置。 In a switching power supply, a first converter converts the output voltage into a clock signal in a first PWM control circuit and turns the main switch on and off via a pulse transformer, and a tertiary winding is provided in the main transformer of this first converter. A second converter includes a FET switch and a smoothing circuit provided in series with the tertiary winding, a tertiary winding is provided in the pulse transformer, and one end of the tertiary winding is connected to the source of the FET switch. an FET drive circuit whose end is connected to the gate of the FET switch via the secondary side of a photocoupler; and a FET drive circuit which detects the output voltage of the second converter in synchronization with the first PWM control circuit and converts it into a clock signal. 1. A multi-output power supply device using FET rectification, characterized in that the output of the second PWM control circuit is connected to the primary side of the photocoupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987163526U JPH066711Y2 (en) | 1987-10-26 | 1987-10-26 | Multi-output power supply device using FET rectification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987163526U JPH066711Y2 (en) | 1987-10-26 | 1987-10-26 | Multi-output power supply device using FET rectification |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0169382U true JPH0169382U (en) | 1989-05-09 |
| JPH066711Y2 JPH066711Y2 (en) | 1994-02-16 |
Family
ID=31448324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987163526U Expired - Lifetime JPH066711Y2 (en) | 1987-10-26 | 1987-10-26 | Multi-output power supply device using FET rectification |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH066711Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011009701A (en) * | 2009-05-19 | 2011-01-13 | Rohm Co Ltd | Drive circuit of light-emitting diode, light-emitting device and display device using the same, and method of protecting the same |
-
1987
- 1987-10-26 JP JP1987163526U patent/JPH066711Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011009701A (en) * | 2009-05-19 | 2011-01-13 | Rohm Co Ltd | Drive circuit of light-emitting diode, light-emitting device and display device using the same, and method of protecting the same |
| US8730228B2 (en) | 2009-05-19 | 2014-05-20 | Rohm Co., Ltd. | Driving circuit for light emitting diode |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH066711Y2 (en) | 1994-02-16 |