JPH03243167A - Switching power supply device - Google Patents
Switching power supply deviceInfo
- Publication number
- JPH03243167A JPH03243167A JP3864690A JP3864690A JPH03243167A JP H03243167 A JPH03243167 A JP H03243167A JP 3864690 A JP3864690 A JP 3864690A JP 3864690 A JP3864690 A JP 3864690A JP H03243167 A JPH03243167 A JP H03243167A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- switching
- power supply
- remote
- 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
- 238000004804 winding Methods 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 238000009499 grossing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 1
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Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はリモート操作で電源出力のオン−オフ切り替え
操作を行うスイッチング電源装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a switching power supply device that performs on-off switching operation of power output by remote operation.
従来の技術
近年、スイッチング電源装置が広く用いられている。こ
れらの電源装置において、その出力をリモートでオン−
オフ切り替えする機能を備えたスイッチング電源装置で
は、第２の電源部を設けてリモート回路部を動作させて
いる。第４図は従来のスイッチング電源装置の構成をブ
ロック図で示す。図に示すように、交流電圧が整流され
た直流電圧が端子１−１間に印加され、その直流電圧が
スイッチング回路３で断続されてスイッチングトランス
２に供給される。トランス２の二次巻線に発生する交流
電圧が整流・平滑回路４で直流に変換されて端子５−６
間に出力される。2. Description of the Related Art In recent years, switching power supplies have been widely used. On these power supplies, you can remotely turn on their outputs.
In a switching power supply device having an off-switching function, a second power supply section is provided to operate a remote circuit section. FIG. 4 shows a block diagram of the configuration of a conventional switching power supply device. As shown in the figure, a DC voltage obtained by rectifying an AC voltage is applied between terminals 1 and 1, and the DC voltage is interrupted by a switching circuit 3 and supplied to a switching transformer 2. The alternating current voltage generated in the secondary winding of the transformer 2 is converted to direct current by the rectifier/smoothing circuit 4 and is then sent to terminals 5-6.
output in between.
一方、第２のスイッチングトランス１０に第２のスイッ
チング回路１１で断続される電流が供給され、第２の整
流・平滑回路９で第２の直流電圧を発生し、その電圧を
リモート制御回路８に供給する。リモート制御回路８は
リモート端子７の入力でスイッチング回路３の動作を実
行または停止する制御を行い、装置がオン−オフされる
。On the other hand, the second switching transformer 10 is supplied with a current that is intermittent by the second switching circuit 11, and the second rectifier/smoothing circuit 9 generates a second DC voltage, which is then sent to the remote control circuit 8. supply The remote control circuit 8 performs control to execute or stop the operation of the switching circuit 3 based on the input from the remote terminal 7, thereby turning the device on and off.
発明が解決しようとする課題
このような従来のスイッチング電源装置では、第２の電
源を備えて、リモート制御回路８を駆動させる構成とす
るために、回路の構成が複雑になり、装置のコストダウ
ンおよび小型化の障害となるものであった。Problems to be Solved by the Invention In such a conventional switching power supply device, since the second power supply is provided to drive the remote control circuit 8, the circuit configuration becomes complicated, and it is difficult to reduce the cost of the device. and became an obstacle to miniaturization.
本発明は上記課題を解決するもので、簡単な構成のスイ
ッチング電源装置を提供することを目的とするものであ
る。The present invention has been made to solve the above problems, and an object of the present invention is to provide a switching power supply device with a simple configuration.
課題を解決するための手段
上記課題を解決するために本発明のスイッチング電源装
置は、交流電圧を整流した直流電圧を断続してスイッチ
ングトランスに入力する駆動動作で第１の出力電圧を得
るスイッチング電源装置において、前記駆動動作を間欠
または連続に実行させる駆動制御手段と、前記トランス
の二次巻線から第２の直流電圧を得る手段と、前記第２
の直流電圧を保持する手段と、前記第２の直流電圧を駆
動電源として前記駆動制御手段の制御出力をリモート入
力に対応して間欠または連続に切り替えるリモート手段
を設けた構成とするものである。Means for Solving the Problems In order to solve the above problems, the switching power supply device of the present invention provides a switching power supply that obtains a first output voltage through a driving operation in which a DC voltage obtained by rectifying an AC voltage is intermittently inputted to a switching transformer. In the apparatus, a drive control means for performing the drive operation intermittently or continuously; a means for obtaining a second DC voltage from a secondary winding of the transformer;
and remote means for switching the control output of the drive control means intermittently or continuously in response to a remote input using the second DC voltage as a drive power source.
作用
本発明は上記した構成により、第２の直流電源が装置の
オフ状態中の電源として保持され、この第２の電源を駆
動電源としてリモート切り替え動作を行う。また、装置
のオフ動作中に第２の直流電圧はスイッチング駆動の間
欠動作で間欠的に補充される。Function: With the above-described configuration, the present invention maintains the second DC power source as a power source when the device is in an off state, and performs remote switching operations using this second power source as a driving power source. Further, during the off-operation of the device, the second DC voltage is intermittently supplemented by intermittent operation of the switching drive.
実施例
本発明の一実施例のスイッチング電源装置について第１
図、第２図を参照しなから説明する。Embodiment 1 Regarding a switching power supply device according to an embodiment of the present invention
This will be explained with reference to FIGS.
第１図は本発明の一実施例のスイッチング電源装置の構
成を示すブロック図である。FIG. 1 is a block diagram showing the configuration of a switching power supply device according to an embodiment of the present invention.
図に示すように、端子１−１間にスイッチングトランス
２の一次巻線とスイッチング駆動回路３が接続され、前
記スイッチングトランス２の二次巻線には整流・平滑回
路４が接続される。以上の構成とその動作機能は従来の
回路と同じで、端子５−６間に直流電圧を出力する。As shown in the figure, a primary winding of a switching transformer 2 and a switching drive circuit 3 are connected between terminals 1-1, and a rectifier/smoothing circuit 4 is connected to a secondary winding of the switching transformer 2. The above configuration and its operational functions are the same as those of the conventional circuit, and a DC voltage is output between terminals 5 and 6.
本実施例の特徴とするところは、第２の直流電圧を発生
し、保持する第２の電源部１３と、スイッチング駆動回
路３の動作を間欠または連続に行わせる駆動制御部１５
と、リモート端子７の入力で前記スイッチング動作の間
欠動作と連続動作と切り替えるリモート回路部１４を設
けたことにある。The features of this embodiment include a second power supply section 13 that generates and holds a second DC voltage, and a drive control section 15 that causes the switching drive circuit 3 to operate intermittently or continuously.
In addition, a remote circuit section 14 is provided which switches the switching operation between intermittent operation and continuous operation based on input from the remote terminal 7.
上記構成において動作を説明すると、装置がオフ状態に
あるとき、駆動制御部１５がスイッチング駆動回路３の
スイッチング動作を間欠的に実行させ、スイッチングト
ランス２の二次巻線には間欠的に交流電圧が発生し、そ
の電圧を第２の電源部１３が第２の直流電圧を発生し、
その直流電圧を間欠動作におけるオフ区間も保持してい
る。リモート回路部１４はこの第２の電源部１３を駆動
電源として動作し、リモート端子７の入力で駆動制御部
１５の間欠動作を連続動作に切り替える。To explain the operation in the above configuration, when the device is in the OFF state, the drive control section 15 causes the switching drive circuit 3 to perform the switching operation intermittently, and the secondary winding of the switching transformer 2 is intermittently supplied with an AC voltage. is generated, and the second power supply section 13 generates a second DC voltage from that voltage,
The DC voltage is maintained even in the off period during intermittent operation. The remote circuit unit 14 operates using the second power supply unit 13 as a driving power source, and switches the intermittent operation of the drive control unit 15 to continuous operation by inputting from the remote terminal 7.
−旦、スイッチング動作が開始すると、リモート端子７
が端子６に接続されている限り、第２の電源部１３がト
ランス２を介してリモート回路部１４の電流を供給する
ので、装置のオン状態が継続する。- When the switching operation starts, the remote terminal 7
As long as is connected to the terminal 6, the second power supply section 13 supplies current to the remote circuit section 14 via the transformer 2, so that the device continues to be in the on state.
この構成では第２の電源部１３に装置の主要部分が共用
されるので、構成が簡単である。In this configuration, the main parts of the device are shared by the second power supply section 13, so the configuration is simple.
第２図に本発明の一実施例のスイッチング電源装置の具
体的回路図を示す。FIG. 2 shows a specific circuit diagram of a switching power supply device according to an embodiment of the present invention.
図に示すように、交流電圧の整流平滑された直流電圧が
供給される端子１−１間にスイッチングトランス２とス
イッチング駆動回路２０が直列に接続される。前記スイ
ッチングトランス２の二次巻線出力端と出力端子５−６
間にダイオード２４゜コンデンサ２７．チョークコイル
３０．コンデンサ２５．抵抗２９で構成される整流・平
滑回路が接続され、ダイオード２２とコンデンサ２３が
直列で前記二次巻線出力端間に接続される。そのダイオ
ード２２のカソードは、ホトカップラ２６のダイオード
のアノードからカソードを通してリモート端子７に接続
される。前記端子１の一方は、抵抗１３とコンデンサ１
５の直列および抵抗１４とツェナーダイオード１８のカ
ソードからアノードを通した直列で端子１の他端に接続
される。トリガ素子１６のアノードは前記抵抗１３とコ
ンデンサ１５の接続点に、カソードは抵抗１７を介して
端子１に、ゲートはツェナーダイオード１８のカソード
に接続される。トランジスタ１９のヘースがトリガ素子
１６のカソードに、エミッタが端子１に、コレクタが前
記スイッチング駆動回路２０を制御する駆動制御回路２
１の制御入力端２８に接続される。また、ホトカップラ
２６のトランジスタのエミッタは端子１に、コレクタは
前記入力端２８に接続される。前記制御回路２１の出力
端は前記スイッチング駆動回路２０に接続される。As shown in the figure, a switching transformer 2 and a switching drive circuit 20 are connected in series between terminals 1-1 to which a DC voltage obtained by rectifying and smoothing an AC voltage is supplied. The secondary winding output end of the switching transformer 2 and the output terminal 5-6
A diode 24° capacitor 27. Choke coil 30. Capacitor 25. A rectifier/smoothing circuit composed of a resistor 29 is connected, and a diode 22 and a capacitor 23 are connected in series between the output terminals of the secondary winding. The cathode of the diode 22 is connected to the remote terminal 7 through the anode and cathode of the diode of the photocoupler 26 . One of the terminals 1 is connected to a resistor 13 and a capacitor 1.
5 in series and the other end of the terminal 1 in series through the resistor 14 and the cathode to the anode of a Zener diode 18. The anode of the trigger element 16 is connected to the connection point between the resistor 13 and the capacitor 15, the cathode is connected to the terminal 1 via the resistor 17, and the gate is connected to the cathode of the Zener diode 18. A drive control circuit 2 whose heath of the transistor 19 is connected to the cathode of the trigger element 16, whose emitter is connected to the terminal 1, and whose collector controls the switching drive circuit 20.
1 control input terminal 28 . Further, the emitter of the transistor of the photocoupler 26 is connected to the terminal 1, and the collector is connected to the input terminal 28. An output terminal of the control circuit 21 is connected to the switching drive circuit 20.
上記構成において動作を説明すると、交流電圧が整流さ
れたのち平滑回路（以上、図示せず。〉を経た直流電圧
が端子１−１間に供給される（この直流電圧はこの電流
装置の出力のオンまたはオフに関係なく供給されている
。）。スイッチング駆動回路２０は前記直流電圧をスイ
ッチングしてトランス２の一次電流をオン−オフし、そ
の電流の断続でトランス２の二次巻線に交流電圧を発生
させている。その交流電圧はダイオード２４で整流され
、コンデンサ２５．２７とチョークコイル３０とで平滑
されて、端子５と６の間に直流電圧を出力する。以上が
スイッチング電源装置の基本動作であるが、スイッチン
グ駆動回路２０のスイッチング動作は駆動制御回路２１
で制御されて、間欠または連続に動作する。駆動制御回
路２１の制御出力は制御端子２８の入力で与えられる。To explain the operation in the above configuration, after the AC voltage is rectified, the DC voltage that has passed through the smoothing circuit (not shown) is supplied between terminals 1 and 1 (this DC voltage is the output of this current device). ).The switching drive circuit 20 switches the DC voltage to turn on and off the primary current of the transformer 2, and the interruption of the current causes the secondary winding of the transformer 2 to receive an AC voltage. A voltage is generated.The AC voltage is rectified by the diode 24, smoothed by the capacitors 25 and 27 and the choke coil 30, and a DC voltage is output between the terminals 5 and 6.The above is the process of the switching power supply. Although it is a basic operation, the switching operation of the switching drive circuit 20 is performed by the drive control circuit 21.
controlled by, and can operate intermittently or continuously. A control output of the drive control circuit 21 is given as an input to a control terminal 28 .
その入力について説明すると、抵抗１３．１４．１７と
、ツェナーダイオード１８と、トリガ素子■６が構成す
る回路部分が端子１−１間の直流電源のもとに一定の周
期でオンとリセットとを繰り返すタイマー動作を行い、
その周期でトランジスタ１９のベース電圧を常にオン−
オフ駆動することにより、そのコレクタ電流が制御端子
２８を常にオンオフしている。いま、リモート端子７が
０ボルト端子６から離れて電源装置がオフ状態にあると
き、スイッチング駆動回路２０の動作を制御しているの
は、前記タイマー動作による制御端子２８のオン−オフ
だけである。このオン−オフ制御でスイッチング駆動回
路２０のスイッチング動作は断続的に行われ、電源装置
はオン−オフ動作している。いま、このオン動作時間を
十分短く、オフ動作を十分長くした間欠動作とする。た
とえば、オフ時間を１分から１０分程度とし、オン時間
を１秒程度とするような間欠動作に設定するとき、出力
端子５，６間に発生ずる出力電圧は通常電圧に比べて百
分の一程度になるので、電源装置としてオフ状態にある
としてよい。一方、前記短いオン時間にダイオード２２
とコンデンサ２３で発生される直流電圧は、リモート端
子７がＯボルト端子６から離れて放電電路がないので、
オフ時間中も前記直流電圧がコンデンサ２３に保持され
ている。また、コンデンサ２３の電圧は前記の間欠動作
でオン毎に補充してチャージされるので、駆動電圧がな
くなる心配はない。スイッチング動作が停止区間中にリ
モート端子７を外部のリモートケーブルでＯボルト端子
６に接続すると、前記コンデンサ２３の直流電圧でホト
カップラ２６が動作して制御端子２８をオンにし、スイ
ッチング駆動回路２０のスイッチング動作を開始させる
。このあとは、トランス２を介してホトカップラ２６（
：電流が供給されるので、ホトカップラ２６の動作は継
続し、スイッチング動作も継続されて電源装置は継続的
にオンとなる。To explain the input, the circuit part constituted by resistors 13, 14, 17, Zener diode 18, and trigger element 6 turns on and resets at a constant cycle under the DC power supply between terminals 1 and 1. Performs a repeating timer operation,
The base voltage of transistor 19 is always on in that period.
By turning it off, the collector current constantly turns the control terminal 28 on and off. Now, when the remote terminal 7 is separated from the 0 volt terminal 6 and the power supply is off, the operation of the switching drive circuit 20 is controlled only by turning the control terminal 28 on and off due to the timer operation. . With this on-off control, the switching operation of the switching drive circuit 20 is performed intermittently, and the power supply device performs an on-off operation. Now, let us assume that the ON operation time is sufficiently short and the OFF operation is sufficiently long to perform intermittent operation. For example, when setting an intermittent operation in which the off time is about 1 minute to 10 minutes and the on time is about 1 second, the output voltage generated between output terminals 5 and 6 is one hundredth of the normal voltage. Therefore, it may be assumed that the power supply device is in an off state. On the other hand, during the short on-time, the diode 22
Since the remote terminal 7 is separated from the O volt terminal 6 and there is no discharge path, the DC voltage generated by the capacitor 23 is as follows.
The DC voltage is maintained in the capacitor 23 even during the off-time. Furthermore, since the voltage of the capacitor 23 is replenished and charged each time the capacitor is turned on in the intermittent operation, there is no fear that the driving voltage will run out. When the remote terminal 7 is connected to the O-volt terminal 6 with an external remote cable during the period when the switching operation is stopped, the photocoupler 26 is activated by the DC voltage of the capacitor 23 to turn on the control terminal 28, and the switching of the switching drive circuit 20 is activated. Start the action. After this, the photocoupler 26 (
: Since current is supplied, the operation of the photocoupler 26 continues, the switching operation also continues, and the power supply device is continuously turned on.
リモート端子７をＯボルト端子６から切り離すと、ホト
カップラ２６の駆動電流が切断され、制御端子２８の制
御は前記タイマ動作のオン−オフだけなり、電源装置は
間欠動作に移る。When the remote terminal 7 is disconnected from the O-volt terminal 6, the drive current of the photocoupler 26 is cut off, the control terminal 28 is controlled only by turning on and off the timer operation, and the power supply device shifts to intermittent operation.
前記間欠動作のオンの時間幅を前述のように連続動作に
比べて十分短く設定し、また、抵抗２９を第１の直流出
力回路に放電路として挿入することにより、間欠動作だ
けのオフ動作中に出力端子５．６間に発生する電圧は通
常動作の電圧に対して無視できる程度となるので、電源
装置はオフ状態とみなすことができる。By setting the ON time width of the intermittent operation to be sufficiently shorter than that of the continuous operation as described above, and by inserting the resistor 29 as a discharge path in the first DC output circuit, the ON time width of the intermittent operation is set to be sufficiently shorter than that of the continuous operation. Since the voltage generated between the output terminals 5 and 6 is negligible compared to the normal operating voltage, the power supply device can be considered to be in an off state.
第３図は本発明の第２の実施例の回路構成を示し、ホト
カップラ２６の電源をトランス２の別の巻線から整流し
て供給する手段としたもので、その動作は前記第１図の
構成の実施例と同じである。FIG. 3 shows the circuit configuration of a second embodiment of the present invention, in which the power supply for the photocoupler 26 is rectified and supplied from another winding of the transformer 2, and its operation is similar to that shown in FIG. The configuration is the same as the embodiment.
このように本発明の実施例のスイッチング電源装置によ
れば、スイッチング動作を間欠または連続に実行させる
駆動制御手段と、前記トランスの二次巻線から第２の直
流電圧を得る手段と、前記第２の直流電圧を保持する手
段と、前記第２の直流電圧を駆動電源として前記スイッ
チング駆動動作の間欠動作と連続動作をリモート入力で
切り替えるリモート手段を設けたことにより、電源装置
の主要部分を共用し、簡単な構成でリモート回路を備え
たスイッチング電源装置を得ることができる。As described above, according to the switching power supply device of the embodiment of the present invention, the drive control means for performing the switching operation intermittently or continuously, the means for obtaining the second DC voltage from the secondary winding of the transformer, and the By providing means for holding the second DC voltage and remote means for switching between intermittent operation and continuous operation of the switching drive operation using the second DC voltage as a drive power source, the main parts of the power supply device are shared. Therefore, a switching power supply device equipped with a remote circuit can be obtained with a simple configuration.
発明の効果
上記の実施例から明らかなように、本発明は交流電圧を
整流した直流電圧を断続してスイッチングトランスに入
力する駆動動作で第１の出力電圧を得るスイッチング電
源装置において、前記駆動動作を間欠または連続に実行
させる駆動制御手段と、前記トランスの二次巻線から第
２の直流電圧を得る手段と、前記第２の直流電圧を保持
する手段と、前記第２の直流電圧を駆動電源として前記
駆動制御手段の制御出力をリモート入力に対応して間欠
または連続に切り替えるリモート手段を設けた構成によ
り、電源装置の主要部分を共用した簡単な構成のリモー
ト回路を備えたスイッチング電源装置を得ることができ
る。Effects of the Invention As is clear from the embodiments described above, the present invention provides a switching power supply device that obtains a first output voltage by a driving operation in which a DC voltage obtained by rectifying an AC voltage is intermittently inputted to a switching transformer. a drive control means for intermittently or continuously executing the above, a means for obtaining a second DC voltage from the secondary winding of the transformer, a means for holding the second DC voltage, and a drive control means for driving the second DC voltage. The switching power supply device is equipped with a remote means for switching the control output of the drive control means intermittently or continuously in response to a remote input as a power supply, and has a simple remote circuit that shares the main parts of the power supply device. Obtainable.
第１図は本発明の一実施例のスイッチング電源装置の構
成を示すブロック図、第２図は本発明の一実施例のスイ
ッチング電源装置の回路図、第３図は本発明の第２の実
施例のスイッチング電源装置の回路図、第４図は従来の
スイッチング電源装置の構成を示すブロック図である。
１・・・・・・直流電圧入力端子、２・・・・・・スイ
ッチングトランス、３・・・・・・スイッチング駆動回
路、１３・・・・・・第２の電源部、１４・・・・・・
リモート回路部（リモート切り替え手段）、１５・・・
・・・駆動制御部（駆動制御手段）。FIG. 1 is a block diagram showing the configuration of a switching power supply device according to an embodiment of the present invention, FIG. 2 is a circuit diagram of a switching power supply device according to an embodiment of the present invention, and FIG. 3 is a block diagram showing a configuration of a switching power supply device according to an embodiment of the present invention. FIG. 4 is a block diagram showing the configuration of a conventional switching power supply. DESCRIPTION OF SYMBOLS 1...DC voltage input terminal, 2...Switching transformer, 3...Switching drive circuit, 13...Second power supply section, 14... ...
Remote circuit section (remote switching means), 15...
... Drive control section (drive control means).
Claims (1)
トランスに入力する駆動動作で第１の出力電圧を得るス
イッチング電源装置において、前記駆動動作を間欠また
は連続に実行させる駆動制御手段と、前記トランスの二
次巻線から第２の直流電圧を得る手段と、前記第２の直
流電圧を保持する手段と、前記第２の直流電圧を駆動電
源として前記駆動制御手段の制御出力をリモート入力に
対応して間欠または連続に切り替えるリモート手段を設
けたスイッチング電源装置。A switching power supply device that obtains a first output voltage by a driving operation of intermittently inputting a DC voltage obtained by rectifying an AC voltage to a switching transformer, comprising: a drive control means for performing the driving operation intermittently or continuously; means for obtaining a second DC voltage from a second winding; means for holding the second DC voltage; A switching power supply equipped with remote means for intermittent or continuous switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3864690A JP2858343B2 (en) | 1990-02-20 | 1990-02-20 | Switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3864690A JP2858343B2 (en) | 1990-02-20 | 1990-02-20 | Switching power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03243167A true JPH03243167A (en) | 1991-10-30 |
| JP2858343B2 JP2858343B2 (en) | 1999-02-17 |
Family
ID=12531021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3864690A Expired - Fee Related JP2858343B2 (en) | 1990-02-20 | 1990-02-20 | Switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2858343B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6288914B1 (en) | 1999-06-09 | 2001-09-11 | Nec Corporation | Switching power source |
| EP1630939A2 (en) | 2004-08-23 | 2006-03-01 | ORION ELECTRIC CO., Ltd. | Electronic device with switching power circuit and power supply control method |
-
1990
- 1990-02-20 JP JP3864690A patent/JP2858343B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6288914B1 (en) | 1999-06-09 | 2001-09-11 | Nec Corporation | Switching power source |
| EP1630939A2 (en) | 2004-08-23 | 2006-03-01 | ORION ELECTRIC CO., Ltd. | Electronic device with switching power circuit and power supply control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2858343B2 (en) | 1999-02-17 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |