JPH01180825U - - Google Patents
Info
- Publication number
- JPH01180825U JPH01180825U JP6959788U JP6959788U JPH01180825U JP H01180825 U JPH01180825 U JP H01180825U JP 6959788 U JP6959788 U JP 6959788U JP 6959788 U JP6959788 U JP 6959788U JP H01180825 U JPH01180825 U JP H01180825U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- output
- signal
- circuit
- reference voltage
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims 2
- 238000011105 stabilization Methods 0.000 claims 2
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は本考案の一実施例を示す構成ブロツク
図、第２図は第１図の装置の不感状態における波
形図、第３図は第１図の装置のシヤツトダウン状
態における波形図、第４図は本考案の第２の実施
例の構成ブロツク図、第５図は第４図の装置の動
作を説明する図である。第６図は従来の直流電源
装置の過電流保護回路の構成ブロツク図、第７図
は第６図の装置の不感状態における波形図、第８
図は第６図の装置のシヤツトダウン状態における
波形図である。
１０……ＤＣ−ＤＣコンバータ、２０……カレ
ントトランス、３０……電流電圧変換回路、６０
……ラツチ回路、７０……ＰＷＭ制御回路、８０
……ゲート回路、９０……積分器、１００……コ
ンパレータ、１１０……ピークホールド回路。
FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a waveform diagram of the device shown in FIG. 1 in a non-sensing state, FIG. 3 is a waveform diagram of the device shown in FIG. This figure is a block diagram of a second embodiment of the present invention, and FIG. 5 is a diagram illustrating the operation of the apparatus shown in FIG. 4. Fig. 6 is a configuration block diagram of an overcurrent protection circuit of a conventional DC power supply device, Fig. 7 is a waveform diagram of the device in Fig. 6 in a non-sensing state, and Fig. 8
The figure is a waveform diagram of the apparatus of FIG. 6 in a shutdown state. 10...DC-DC converter, 20...Current transformer, 30...Current voltage conversion circuit, 60
... Latch circuit, 70 ... PWM control circuit, 80
... gate circuit, 90 ... integrator, 100 ... comparator, 110 ... peak hold circuit.
Claims (1)
続し、この接続された直流電圧をスイツチング素
子によりオンオフして二次側に電力を伝送し、こ
の伝送された電力を整流平滑化して直流電圧を出
力するコンバータ部と、 このコンバータ部の出力電圧を検出し、当該コ
ンバータ部の出力電圧が所定の基準電圧と一致す
るように前記スイツチング素子に制御信号を送る
出力安定化部と、 を備えた直流電源装置において、 前記トランスの一次側に現れたスイツチング電
流を検出する手段、 この検出された信号を整流すると共に、電流電
圧変換する手段、 この電圧電流変換された信号を所定の時定数で
積分する手段、 この積分された信号と所定の基準電圧とを比較
して過電流状態にあるか否か判断するコンパレー
タ、 このコンパレータで過電流状態を検出した場合
は、この信号を保持するラツチ回路、 このラツチ回路で過電流状態を検出していない
場合は前記出力安定化回路の制御信号出力を認め
、過電流状態を検出している場合は制御信号の出
力を認めないゲート回路、 よりなる過電流保護部を設けたことを特徴とす
る直流電源装置の過電流保護回路。 (2) 前記コンバータ部と、前記過電流保護部と
を有すると共に、 前記電圧電流変換手段で出力された信号を入力
して各パルス信号の最大値を保持するサンプルホ
ールド回路、 このサンプルホールド回路の出力信号を第１の
基準電圧と比較する第１の誤差アンプ、前記出力
電圧と第２の基準電圧とを比較する第２の誤差ア
ンプ、これら誤差アンプのうちいずれか一方が基
準電圧より高い（Ｈ）と判断した場合は前記スイ
ツチング素子の動作を低下させる方向に制御信号
を生成させる出力安定化回路、 を具備することを特徴とする請求項１記載の直
流電源装置の過電流保護回路。[Claims for Utility Model Registration] (1) A DC voltage is input and connected to the primary side of a transformer, and the connected DC voltage is turned on and off by a switching element to transmit power to the secondary side, and this transmitted DC voltage is turned on and off by a switching element. a converter unit that rectifies and smoothes the output power and outputs a DC voltage; and a converter unit that detects the output voltage of this converter unit and sends a control signal to the switching element so that the output voltage of the converter unit matches a predetermined reference voltage. A DC power supply device comprising: an output stabilizing section; means for detecting the switching current appearing on the primary side of the transformer; means for rectifying the detected signal and converting it from current to voltage; a comparator that compares the integrated signal with a predetermined reference voltage to determine whether or not an overcurrent condition exists; , a latch circuit that holds this signal. If this latch circuit does not detect an overcurrent condition, the control signal output of the output stabilization circuit is allowed, and if an overcurrent condition is detected, it does not output the control signal. An overcurrent protection circuit for a DC power supply device, characterized in that it is provided with an overcurrent protection section consisting of a gate circuit that is not permitted. (2) A sample-and-hold circuit that includes the converter section and the overcurrent protection section, and that inputs the signal output from the voltage-current conversion means and holds the maximum value of each pulse signal; a first error amplifier that compares the output signal with a first reference voltage; a second error amplifier that compares the output voltage with a second reference voltage; one of these error amplifiers is higher than the reference voltage ( The overcurrent protection circuit for a DC power supply device according to claim 1, further comprising: an output stabilization circuit that generates a control signal in a direction that reduces the operation of the switching element when it is determined that H).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6959788U JPH01180825U (en) | 1988-05-26 | 1988-05-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6959788U JPH01180825U (en) | 1988-05-26 | 1988-05-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01180825U true JPH01180825U (en) | 1989-12-26 |
Family
ID=31294874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6959788U Pending JPH01180825U (en) | 1988-05-26 | 1988-05-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01180825U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09327127A (en) * | 1996-06-06 | 1997-12-16 | Fuji Elelctrochem Co Ltd | Multioutput-type power-supply apparatus for parallel operation and protective method for its overload |
| JP2005261168A (en) * | 2004-03-15 | 2005-09-22 | Sony Corp | Power control device, power supply unit, control method for power circuit |
| JP2008199878A (en) * | 2007-01-19 | 2008-08-28 | Toyota Industries Corp | Method of control of dc-dc converter, and dc-dc converter |
-
1988
- 1988-05-26 JP JP6959788U patent/JPH01180825U/ja active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09327127A (en) * | 1996-06-06 | 1997-12-16 | Fuji Elelctrochem Co Ltd | Multioutput-type power-supply apparatus for parallel operation and protective method for its overload |
| JP2005261168A (en) * | 2004-03-15 | 2005-09-22 | Sony Corp | Power control device, power supply unit, control method for power circuit |
| JP4525120B2 (en) * | 2004-03-15 | 2010-08-18 | ソニー株式会社 | Power supply control device, power supply device, and control method for power supply circuit |
| JP2008199878A (en) * | 2007-01-19 | 2008-08-28 | Toyota Industries Corp | Method of control of dc-dc converter, and dc-dc converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3938024A (en) | Converter regulation by controlled conduction overlap | |
| JP2571942Y2 (en) | Boost converter | |
| JPH01180825U (en) | ||
| JPS63287364A (en) | Auxiliary power circuit for switching regulator | |
| JPH06103987B2 (en) | Peak current control converter | |
| JPH0179389U (en) | ||
| JPS61133816U (en) | ||
| JPS63156585U (en) | ||
| JP2795232B2 (en) | DC-DC converter | |
| JP3282888B2 (en) | Charging device | |
| JPS59161394U (en) | Overcurrent protection device for power switch elements in switching power supplies | |
| JPH0739341Y2 (en) | Constant current circuit | |
| JPS602388U (en) | DC/DC converter power supply | |
| JPS61277374A (en) | Current limit circuit for switching regulator | |
| JPH03111180U (en) | ||
| JPH0377287U (en) | ||
| JPH01162781U (en) | ||
| JPH0636650B2 (en) | Overvoltage protection circuit for switching regulator | |
| JPH01113585U (en) | ||
| JPH0182681U (en) | ||
| JPH04127871A (en) | High voltage power supply | |
| JPH0354378U (en) | ||
| JPH01180827U (en) | ||
| JPS61123686U (en) | ||
| JPS6296716U (en) |