TWI645657B - Power conversion device and voltage regulating feedback circuit - Google Patents
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Abstract
一種電源轉換裝置包含變壓器、開關元件、控制電路、副邊電路、穩壓回授電路以及隔離電路。變壓器包含一次側繞組以及二次側繞組。開關元件電性耦接一次側繞組與原邊接地端之間。控制電路用以輸出控制訊號選擇性地導通或關斷開關元件。副邊電路電性耦接於二次側繞組，用以輸出一輸出電壓。穩壓回授電路電性耦接於副邊電路。隔離電路電性耦接於穩壓回授電路與控制電路之間。當輸出電壓大於上限值時，穩壓回授電路透過隔離電路輸出回授訊號至控制電路，使得控制電路關斷開關元件。A power conversion device includes a transformer, a switching element, a control circuit, a secondary circuit, a regulated feedback circuit, and an isolation circuit. The transformer includes a primary side winding and a secondary side winding. The switching element is electrically coupled between the primary side winding and the primary grounding end. The control circuit is configured to output a control signal to selectively turn the switching element on or off. The secondary circuit is electrically coupled to the secondary winding for outputting an output voltage. The regulated feedback circuit is electrically coupled to the secondary circuit. The isolation circuit is electrically coupled between the regulated feedback circuit and the control circuit. When the output voltage is greater than the upper limit value, the regulated feedback circuit outputs a feedback signal to the control circuit through the isolation circuit, so that the control circuit turns off the switching element.
Description
本案係關於一種電源轉換裝置，且特別係關於一種採用交換式電源轉換器架構的電源轉換裝置。The present invention relates to a power conversion device, and more particularly to a power conversion device using a switched power converter architecture.
近來，許多電子產品與驅動電路採用交換式電源進行供電。當後級負載電路所需的功率變化，使得電源處在空載狀態時，電源的輸出電壓會發生上飄的情形，無法滿足相關安全法規的規範。Recently, many electronic products and drive circuits are powered by a switched power supply. When the power required by the rear-stage load circuit changes, the output voltage of the power supply will rise when the power supply is in the no-load state, and the relevant safety regulations cannot be met.
本揭示內容的一態樣為一種電源轉換裝置。電源轉換裝置包含變壓器、開關元件、控制電路、副邊電路、穩壓回授電路以及隔離電路。變壓器包含一次側繞組以及二次側繞組。開關元件電性耦接於一次側繞組與原邊接地端之間。控制電路用以輸出控制訊號選擇性地導通或關斷開關元件。副邊電路電性耦接於二次側繞組，用以輸出一輸出電壓。穩壓回授電路電性耦接於副邊電路。隔離電路電性耦接於穩壓回授電路與控制電路之間。當輸出電壓大於上限值時，穩壓回授電路透過隔離電路輸出回授訊號至控制電路，使得控制電路關斷開關元件。One aspect of the present disclosure is a power conversion device. The power conversion device includes a transformer, a switching element, a control circuit, a secondary circuit, a regulated feedback circuit, and an isolation circuit. The transformer includes a primary side winding and a secondary side winding. The switching element is electrically coupled between the primary side winding and the primary grounding end. The control circuit is configured to output a control signal to selectively turn the switching element on or off. The secondary circuit is electrically coupled to the secondary winding for outputting an output voltage. The regulated feedback circuit is electrically coupled to the secondary circuit. The isolation circuit is electrically coupled between the regulated feedback circuit and the control circuit. When the output voltage is greater than the upper limit value, the regulated feedback circuit outputs a feedback signal to the control circuit through the isolation circuit, so that the control circuit turns off the switching element.
在本揭示內容部分實施例中，穩壓回授電路包含齊納二極體單元，當輸出電壓大於上限值時，齊納二極體單元逆向導通，使得第一電流流經隔離電路的副邊側，進而導通隔離電路的原邊側以提供回授訊號至控制電路。In some embodiments of the present disclosure, the regulated feedback circuit includes a Zener diode unit. When the output voltage is greater than the upper limit, the Zener diode unit is reversely turned on, so that the first current flows through the pair of isolation circuits. The side, and thus the primary side of the isolation circuit, is turned on to provide a feedback signal to the control circuit.
在本揭示內容部分實施例中，穩壓回授電路更包含第一二極體單元以及第一分壓單元。第一二極體單元的陽極端電性耦接於副邊電路，第一二極體單元的陰極端電性耦接於齊納二極體的陰極端。第一分壓單元電性耦接於齊納二極體單元的陽極端與隔離電路的副邊側。In some embodiments of the present disclosure, the regulated feedback circuit further includes a first diode unit and a first voltage dividing unit. The anode end of the first diode unit is electrically coupled to the secondary side circuit, and the cathode end of the first diode unit is electrically coupled to the cathode end of the Zener diode. The first voltage dividing unit is electrically coupled to the anode end of the Zener diode unit and the secondary side of the isolation circuit.
在本揭示內容部分實施例中，第一分壓單元包含第一分壓電阻以及第二分壓電阻。第一分壓電阻的第一端電性耦接於齊納二極體的陽極端，第一分壓電阻的第二端電性耦接於隔離電路的副邊側之第一輸入端。第二分壓電阻的第一端電性耦接於第一分壓電阻的第二端，第二分壓電阻的第二端電性耦接於隔離電路的副邊側之第二輸入端。In some embodiments of the present disclosure, the first voltage dividing unit includes a first voltage dividing resistor and a second voltage dividing resistor. The first end of the first voltage dividing resistor is electrically coupled to the anode end of the Zener diode, and the second end of the first voltage dividing resistor is electrically coupled to the first input end of the secondary side of the isolation circuit. The first end of the second voltage dividing resistor is electrically coupled to the second end of the first voltage dividing resistor, and the second end of the second voltage dividing resistor is electrically coupled to the second input end of the secondary side of the isolation circuit.
在本揭示內容部分實施例中，穩壓回授電路更包含穩壓器單元以及第二分壓單元。穩壓器單元的陰極端電性耦接於隔離電路的副邊側之第二輸入端，穩壓器單元的陽極端電性耦接於副邊接地端，穩壓器單元的參考端用以提供參考電壓。第二分壓單元電性耦接於副邊電路與副邊接地端之間，並電性耦接於穩壓器單元的參考端。In some embodiments of the present disclosure, the regulated feedback circuit further includes a voltage regulator unit and a second voltage dividing unit. The cathode end of the voltage regulator unit is electrically coupled to the second input end of the secondary side of the isolation circuit, and the anode end of the voltage regulator unit is electrically coupled to the ground side of the secondary side, and the reference end of the voltage regulator unit is used for Provide a reference voltage. The second voltage dividing unit is electrically coupled between the secondary circuit and the secondary ground, and is electrically coupled to the reference end of the voltage regulator unit.
在本揭示內容部分實施例中，穩壓器單元更用以根據參考電壓控制輸出電壓的電壓準位。In some embodiments of the present disclosure, the voltage regulator unit is further configured to control the voltage level of the output voltage according to the reference voltage.
在本揭示內容部分實施例中，第二分壓單元包含第三分壓電阻以及第四分壓電阻。第三分壓電阻的第一端電性耦接於副邊電路，第三分壓電阻的第二端電性耦接於穩壓器單元的參考端。第四分壓電阻的第一端電性耦接於第三分壓電阻的第二端，第四分壓電阻的第二端電性耦接於副邊接地端。In some embodiments of the present disclosure, the second voltage dividing unit includes a third voltage dividing resistor and a fourth voltage dividing resistor. The first end of the third voltage dividing resistor is electrically coupled to the secondary side circuit, and the second end of the third voltage dividing resistor is electrically coupled to the reference end of the voltage regulator unit. The first end of the fourth voltage dividing resistor is electrically coupled to the second end of the third voltage dividing resistor, and the second end of the fourth voltage dividing resistor is electrically coupled to the secondary grounding end.
在本揭示內容部分實施例中，變壓器更包含輔助繞組。電源轉換裝置更包含第三分壓單元。第三分壓單元電性耦接輔助繞組與原邊接地端之間，第三分壓單元用以輸出回授電壓至控制電路，使得控制電路根據回授電壓調節控制訊號的責任週期。In some embodiments of the present disclosure, the transformer further includes an auxiliary winding. The power conversion device further includes a third voltage dividing unit. The third voltage dividing unit is electrically coupled between the auxiliary winding and the primary grounding end, and the third voltage dividing unit is configured to output a feedback voltage to the control circuit, so that the control circuit adjusts the duty cycle of the control signal according to the feedback voltage.
在本揭示內容部分實施例中，第三分壓單元包含第五分壓電阻以及第六分壓電阻。第五分壓電阻的第一端電性耦接於輔助繞組，第五分壓電阻的第二端電性耦接於控制電路。第六分壓電阻的第一端電性耦接於第五分壓電阻的第二端，第六分壓電阻的第二端電性耦接於原邊接地端。In some embodiments of the present disclosure, the third voltage dividing unit includes a fifth voltage dividing resistor and a sixth voltage dividing resistor. The first end of the fifth voltage dividing resistor is electrically coupled to the auxiliary winding, and the second end of the fifth voltage dividing resistor is electrically coupled to the control circuit. The first end of the sixth voltage dividing resistor is electrically coupled to the second end of the fifth voltage dividing resistor, and the second end of the sixth voltage dividing resistor is electrically coupled to the primary grounding end.
在本揭示內容部分實施例中，副邊電路包含第二二極體單元以及輸出電容單元。第二二極體單元的陽極端電性耦接於二次側繞組。輸出電容單元的第一端電性耦接於第二二極體單元的陰極端與穩壓回授電路，輸出電容單元的第二端電性耦接於副邊接地端。In some embodiments of the present disclosure, the secondary side circuit includes a second diode unit and an output capacitor unit. The anode end of the second diode unit is electrically coupled to the secondary winding. The first end of the output capacitor unit is electrically coupled to the cathode end of the second diode unit and the voltage stabilizing feedback circuit, and the second end of the output capacitor unit is electrically coupled to the ground side of the secondary side.
本揭示內容的另一態樣為一種穩壓回授電路。穩壓回授電路包含第一二極體單元、齊納二極體單元以及第一分壓單元。第一二極體單元的陽極端用以接收電源轉換裝置的輸出端輸出的輸出電壓。齊納二極體單元的陰極端電性耦接於第一二極體單元的陰極端。第一分壓單元電性耦接於齊納二極體單元的陽極端與隔離電路。當電源轉換裝置輸出的輸出電壓大於上限值時，齊納二極體單元逆向導通，使得第一電流流經隔離電路的副邊側，進而導通隔離電路的原邊側以提供回授訊號至電源轉換裝置的原邊側，以降低輸出電壓。Another aspect of the present disclosure is a regulated feedback circuit. The regulated feedback circuit includes a first diode unit, a Zener diode unit, and a first voltage dividing unit. The anode end of the first diode unit is configured to receive an output voltage outputted from an output of the power conversion device. The cathode end of the Zener diode unit is electrically coupled to the cathode end of the first diode unit. The first voltage dividing unit is electrically coupled to the anode end of the Zener diode unit and the isolation circuit. When the output voltage outputted by the power conversion device is greater than the upper limit value, the Zener diode unit is reversely turned on, so that the first current flows through the secondary side of the isolation circuit, thereby turning on the primary side of the isolation circuit to provide a feedback signal to The primary side of the power conversion unit to reduce the output voltage.
在本揭示內容部分實施例中，第一分壓單元包含第一分壓電阻與第二分壓電阻。第一分壓電阻的第一端電性耦接於齊納二極體單元的陽極端，第一分壓電阻的第二端電性耦接於隔離電路的副邊側之第一輸入端。第二分壓電阻的第一端電性耦接於第一分壓電阻的第二端，第二分壓電阻的第二端電性耦接於隔離電路的副邊側之第二輸入端。In some embodiments of the present disclosure, the first voltage dividing unit includes a first voltage dividing resistor and a second voltage dividing resistor. The first end of the first voltage dividing resistor is electrically coupled to the anode end of the Zener diode unit, and the second end of the first voltage dividing resistor is electrically coupled to the first input end of the secondary side of the isolation circuit. The first end of the second voltage dividing resistor is electrically coupled to the second end of the first voltage dividing resistor, and the second end of the second voltage dividing resistor is electrically coupled to the second input end of the secondary side of the isolation circuit.
在本揭示內容部分實施例中，穩壓回授電路更包含穩壓器單元以及第二分壓單元。穩壓器單元的陰極端電性耦接於隔離電路的副邊側，穩壓器單元的陽極端電性耦接於副邊接地端，穩壓器單元的參考端用以提供參考電壓。第二分壓單元電性耦接於電源轉換裝置的副邊側與副邊接地端之間，並電性耦接於穩壓器單元的參考端。In some embodiments of the present disclosure, the regulated feedback circuit further includes a voltage regulator unit and a second voltage dividing unit. The cathode end of the voltage regulator unit is electrically coupled to the secondary side of the isolation circuit. The anode end of the voltage regulator unit is electrically coupled to the ground side of the secondary side, and the reference end of the voltage regulator unit is used to provide a reference voltage. The second voltage dividing unit is electrically coupled between the secondary side and the secondary ground of the power conversion device, and is electrically coupled to the reference end of the voltage regulator unit.
在本揭示內容部分實施例中，穩壓器單元更用以根據參考電壓控制輸出電壓的電壓準位。In some embodiments of the present disclosure, the voltage regulator unit is further configured to control the voltage level of the output voltage according to the reference voltage.
在本揭示內容部分實施例中，第二分壓單元包含第三分壓電阻以及第四分壓電阻。第三分壓電阻的第一端電性耦接於輸出端，第三分壓電阻的第二端電性耦接於穩壓器單元的參考端。第四分壓電阻的第一端電性耦接於第三分壓電阻的第二端，第四分壓電阻的第二端電性耦接於副邊接地端。In some embodiments of the present disclosure, the second voltage dividing unit includes a third voltage dividing resistor and a fourth voltage dividing resistor. The first end of the third voltage dividing resistor is electrically coupled to the output end, and the second end of the third voltage dividing resistor is electrically coupled to the reference end of the voltage regulator unit. The first end of the fourth voltage dividing resistor is electrically coupled to the second end of the third voltage dividing resistor, and the second end of the fourth voltage dividing resistor is electrically coupled to the secondary grounding end.
綜上所述，本案的電源轉換裝置可透過穩壓回授電路中的齊納二極體單元以及分壓單元，於輸出電壓大於上限值時產生流經隔離電路的副邊側的電流。藉此，隔離電路便可於原邊側相應提供回授訊號至控制電路，以將控制電路的腳位的電壓準位拉低。如此一來，控制電路便可進入保護模式，停止輸出脈衝寬度調變訊號，使得開關元件相應關斷，進而降低輸出電壓。In summary, the power conversion device of the present invention can pass the Zener diode unit and the voltage dividing unit in the voltage feedback circuit to generate a current flowing through the secondary side of the isolation circuit when the output voltage is greater than the upper limit. Thereby, the isolation circuit can provide a feedback signal to the control circuit on the primary side to lower the voltage level of the pin of the control circuit. In this way, the control circuit can enter the protection mode, stop outputting the pulse width modulation signal, so that the switching elements are turned off correspondingly, thereby reducing the output voltage.
下文係舉實施例配合所附圖式作詳細說明，以更好地理解本案的態樣，但所提供之實施例並非用以限制本揭露所涵蓋的範圍，而結構操作之描述非用以限制其執行之順序，任何由元件重新組合之結構，所產生具有均等功效的裝置，皆為本揭露所涵蓋的範圍。此外，根據業界的標準及慣常做法，圖式僅以輔助說明為目的，並未依照原尺寸作圖，實際上各種特徵的尺寸可任意地增加或減少以便於說明。下述說明中相同元件將以相同之符號標示來進行說明以便於理解。The embodiments are described in detail below to better understand the aspects of the present invention, but the embodiments are not intended to limit the scope of the disclosure, and the description of the structural operation is not limited. The order in which they are performed, any device that is recombined by components, produces equal devices, and is covered by this disclosure. In addition, according to industry standards and practices, the drawings are only for the purpose of assisting the description, and are not drawn according to the original size. In fact, the dimensions of the various features may be arbitrarily increased or decreased for convenience of explanation. In the following description, the same elements will be denoted by the same reference numerals for explanation.
在全篇說明書與申請專利範圍所使用之用詞（terms），除有特別註明外，通常具有每個用詞使用在此領域中、在此揭露之內容中與特殊內容中的平常意義。某些用以描述本揭露之用詞將於下或在此說明書的別處討論，以提供本領域技術人員在有關本揭露之描述上額外的引導。The terms used in the entire specification and the scope of the patent application, unless otherwise specified, generally have the ordinary meaning of each term used in the field, the content disclosed herein, and the particular content. Certain terms used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in the description of the disclosure.
此外，在本文中所使用的用詞『包含』、『包括』、『具有』、『含有』等等，均為開放性的用語，即意指『包含但不限於』。此外，本文中所使用之『及／或』，包含相關列舉項目中一或多個項目的任意一個以及其所有組合。In addition, the terms "including", "including", "having", "containing", and the like, as used herein, are all open terms, meaning "including but not limited to". Further, "and/or" as used herein includes any one or combination of one or more of the associated listed items.
於本文中，當一元件被稱為『連接』或『耦接』時，可指『電性連接』或『電性耦接』。『連接』或『耦接』亦可用以表示二或多個元件間相互搭配操作或互動。此外，雖然本文中使用『第一』、『第二』、…等用語描述不同元件，該用語僅是用以區別以相同技術用語描述的元件或操作。除非上下文清楚指明，否則該用語並非特別指稱或暗示次序或順位，亦非用以限定本發明。As used herein, when an element is referred to as "connected" or "coupled", it may mean "electrically connected" or "electrically coupled". "Connected" or "coupled" can also be used to indicate that two or more components operate or interact with each other. In addition, although the terms "first", "second", and the like are used herein to describe different elements, the terms are used only to distinguish the elements or operations described in the same technical terms. The use of the term is not intended to be a limitation or a
請參考第1圖。第1圖為根據本案部分實施例所繪示的電源轉換裝置100的示意圖。如第1圖所示，在部分實施例中，電源轉換裝置100包含整流電路120、變壓器T1、開關元件S1、控制電路140、副邊電路160、穩壓回授電路180以及隔離電路OP1。Please refer to Figure 1. FIG. 1 is a schematic diagram of a power conversion device 100 according to some embodiments of the present disclosure. As shown in FIG. 1, in some embodiments, the power conversion device 100 includes a rectifier circuit 120, a transformer T1, a switching element S1, a control circuit 140, a secondary circuit 160, a voltage regulation feedback circuit 180, and an isolation circuit OP1.
如第1圖所示，電源轉換裝置100用以接收交流電壓Vac，並將交流電壓Vac轉換為輸出電壓Vo，並將輸出電壓Vo由電源轉換裝置100的輸出端輸出至後端負載。在結構上，整流電路120用以自其輸入端接收交流電壓Vac，並將交流電壓Vac轉換為直流電壓Vin，透過其輸出端輸出至電容單元Cin的兩端。As shown in FIG. 1, the power conversion device 100 is configured to receive the AC voltage Vac and convert the AC voltage Vac into an output voltage Vo, and output the output voltage Vo from the output of the power conversion device 100 to the back end load. Structurally, the rectifier circuit 120 is configured to receive the AC voltage Vac from its input terminal, and convert the AC voltage Vac into a DC voltage Vin, and output it to both ends of the capacitor unit Cin through its output terminal.
變壓器T1包含一次側繞組Np以及二次側繞組Ns。在變壓器T1的原邊側，一次側繞組Np的第一端電性耦接於整流電路120的輸出端。開關元件S1的第一端電性耦接一次側繞組Np之第二端，開關元件S1的第二端電性耦接於原邊接地端。控制電路140電性耦接於開關元件S1的控制端，用以輸出控制訊號CT1選擇性地導通或關斷開關元件S1。The transformer T1 includes a primary side winding Np and a secondary side winding Ns. On the primary side of the transformer T1, the first end of the primary side winding Np is electrically coupled to the output end of the rectifier circuit 120. The first end of the switching element S1 is electrically coupled to the second end of the primary winding Np, and the second end of the switching element S1 is electrically coupled to the primary ground. The control circuit 140 is electrically coupled to the control terminal of the switching element S1 for outputting the control signal CT1 to selectively turn on or off the switching element S1.
另一方面，在變壓器T1的副邊側，二次側繞組Ns電性耦接於副邊電路160。藉此，變壓器T1、開關元件S1以及副邊電路160便可形成隔離型的高頻直流直流電源轉換器電路，將直流電壓Vin轉換為輸出電壓Vo。On the other hand, on the secondary side of the transformer T1, the secondary side winding Ns is electrically coupled to the secondary side circuit 160. Thereby, the transformer T1, the switching element S1, and the secondary circuit 160 can form an isolated high-frequency DC-DC power converter circuit, and convert the DC voltage Vin into an output voltage Vo.
具體來說，如第1圖所示，在部分實施例中，副邊電路160包含二極體單元D2以及輸出電容單元Co。在結構上，二極體單元D2的陽極端電性耦接於二次側繞組Ns。輸出電容單元Co的第一端電性耦接於二極體單元D2的陰極端與穩壓回授電路180，輸出電容單元Co的第二端電性耦接於副邊接地端。Specifically, as shown in FIG. 1, in some embodiments, the secondary circuit 160 includes a diode unit D2 and an output capacitor unit Co. Structurally, the anode end of the diode unit D2 is electrically coupled to the secondary side winding Ns. The first end of the output capacitor unit Co is electrically coupled to the cathode end of the diode unit D2 and the voltage stabilizing feedback circuit 180. The second end of the output capacitor unit Co is electrically coupled to the ground side of the secondary side.
在操作上，控制電路140可輸出脈衝寬度調變(Pulse Width Modulation，PWM)訊號作為控制訊號CT1，並透過調整控制訊號CT1的責任週期控制輸出電壓Vo的大小。In operation, the control circuit 140 can output a Pulse Width Modulation (PWM) signal as the control signal CT1, and control the output voltage Vo by adjusting the duty cycle of the control signal CT1.
當開關元件S1導通形成電氣迴路時，原邊電流會流經變壓器T1中的一次側繞組Np，使得能量被儲存在一次側繞組Np當中。由於一次側繞組Np與二次側繞組Ns極性相反，此時副邊電路160中的二極體單元D2處於逆向偏壓，沒有能量轉移至負載。電源轉換裝置100由副邊電路160中的輸出電容單元Co中所儲存的能量提供後級電路所需要的輸出電壓Vo。When the switching element S1 is turned on to form an electrical loop, the primary current flows through the primary side winding Np in the transformer T1, so that energy is stored in the primary side winding Np. Since the primary side winding Np is opposite in polarity to the secondary side winding Ns, the diode unit D2 in the secondary side circuit 160 is now in reverse bias, and no energy is transferred to the load. The power conversion device 100 provides the output voltage Vo required by the subsequent stage circuit from the energy stored in the output capacitance unit Co in the secondary circuit 160.
當開關元件S1截止電氣迴路闗斷時，一次側繞組Np、二次側繞組Ns上的極性反轉，使得二極體單元D2導通，儲存於變壓器T1中的能量轉移至副邊側並輸出至後級電路以及輸出電容單元Co。由於功率轉換的比值與變壓器T1的匝數比以及責任週期相關，控制電路140便可透過調整控制訊號CT1的責任週期控制輸出電壓Vo的大小。When the switching element S1 is cut off from the electrical circuit, the polarity on the primary side winding Np and the secondary side winding Ns is reversed, so that the diode unit D2 is turned on, and the energy stored in the transformer T1 is transferred to the secondary side and output to The latter circuit and the output capacitor unit Co. Since the ratio of the power conversion is related to the turns ratio of the transformer T1 and the duty cycle, the control circuit 140 can control the magnitude of the output voltage Vo by adjusting the duty cycle of the control signal CT1.
在部分實施例中，當電源轉換裝置100的輸出處於空載時，其輸出端的輸出電壓Vo的電壓準位會上飄。舉例來說，在輸出電壓Vo額定輸出為55V的實施例中，在空載情況下，輸出電壓Vo可能會上飄超過60V，導致超過安全超低電壓(safety extra low voltage，SELV)所規範的安全準位。因此，電源轉換裝置100可透過穩壓回授電路180以及隔離電路OP1的協同操作，確保輸出電壓Vo不超過一上限值(如：60V)，並將輸出電壓Vo穩壓在目標的電壓準位。In some embodiments, when the output of the power conversion device 100 is at no load, the voltage level of the output voltage Vo at its output will float. For example, in an embodiment where the output voltage Vo is rated at 55V, the output voltage Vo may rise above 60V under no-load conditions, resulting in exceeding the specification of the safety extra low voltage (SELV). Safety level. Therefore, the power conversion device 100 can ensure the output voltage Vo does not exceed an upper limit value (for example, 60 V) through the cooperative operation of the voltage stabilization feedback circuit 180 and the isolation circuit OP1, and stabilizes the output voltage Vo at the target voltage level. Bit.
在結構上，穩壓回授電路180於電源轉換裝置100的輸出端電性耦接於副邊電路160。隔離電路OP1電性耦接於穩壓回授電路180與控制電路140的腳位COM之間。The voltage feedback circuit 180 is electrically coupled to the secondary circuit 160 at the output of the power conversion device 100. The isolation circuit OP1 is electrically coupled between the voltage feedback feedback circuit 180 and the pin COM of the control circuit 140.
如第1圖所示，在部分實施例中，穩壓回授電路180包含二極體單元D1、齊納二極體單元ZD1、分壓單元182。在結構上，二極體單元D1的陽極端電性耦接於副邊電路160的輸出端。二極體單元D1的陰極端電性耦接於齊納二極體單元ZD1的陰極端。分壓單元182電性耦接於齊納二極體單元ZD1的陽極端、隔離電路OP1的副邊側以及副邊接地端。As shown in FIG. 1, in some embodiments, the regulated feedback circuit 180 includes a diode unit D1, a Zener diode unit ZD1, and a voltage dividing unit 182. Structurally, the anode end of the diode unit D1 is electrically coupled to the output end of the secondary circuit 160. The cathode end of the diode unit D1 is electrically coupled to the cathode end of the Zener diode unit ZD1. The voltage dividing unit 182 is electrically coupled to the anode end of the Zener diode unit ZD1, the secondary side of the isolation circuit OP1, and the secondary ground terminal.
具體來說，在部分實施例中，分壓單元182包含分壓電阻R1、R2。在結構上，分壓電阻R1的第一端電性耦接於齊納二極體單元ZD1的陽極端。分壓電阻R1的第二端電性耦接於隔離電路OP1的副邊側之第一輸入端。分壓電阻R2的第一端電性耦接於分壓電阻R1的第二端，分壓電阻R2的第二端電性耦接於隔離電路OP1的副邊側之第二輸入端。Specifically, in some embodiments, the voltage dividing unit 182 includes voltage dividing resistors R1, R2. Structurally, the first end of the voltage dividing resistor R1 is electrically coupled to the anode terminal of the Zener diode unit ZD1. The second end of the voltage dividing resistor R1 is electrically coupled to the first input end of the secondary side of the isolation circuit OP1. The first end of the voltage dividing resistor R2 is electrically coupled to the second end of the voltage dividing resistor R1, and the second end of the voltage dividing resistor R2 is electrically coupled to the second input end of the secondary side of the isolation circuit OP1.
為便於說明穩壓回授電路180以及隔離電路OP1的操作，請一併參考第2圖。第2圖為根據本案部分實施例所繪示的電源轉換裝置100的操作示意圖。For convenience of explanation of the operation of the voltage feedback feedback circuit 180 and the isolation circuit OP1, please refer to FIG. 2 together. FIG. 2 is a schematic diagram of the operation of the power conversion device 100 according to some embodiments of the present disclosure.
如第2圖所示，穩壓回授電路180中的齊納二極體單元ZD1可選用具有適當逆向崩潰電壓(如：60V)的齊納二極體。藉此，當輸出電壓Vo大於上限值時，齊納二極體單元ZD1逆向導通形成電氣迴路，使得電流I1流經隔離電路OP1的副邊側，進而導通隔離電路OP1的原邊側以提供回授訊號Vcom至控制電路140的腳位COM。如此一來，當輸出電壓Vo大於上限值(如：60V)時，穩壓回授電路180便可透過隔離電路OP1輸出回授訊號Vcom至控制電路140，使得控制電路140關斷開關元件S1。As shown in FIG. 2, the Zener diode unit ZD1 in the regulated feedback circuit 180 can be selected from a Zener diode having a suitable reverse collapse voltage (eg, 60V). Thereby, when the output voltage Vo is greater than the upper limit value, the Zener diode unit ZD1 is reversely turned to form an electrical circuit, so that the current I1 flows through the secondary side of the isolation circuit OP1, thereby turning on the primary side of the isolation circuit OP1 to provide The feedback signal Vcom is fed to the pin COM of the control circuit 140. In this way, when the output voltage Vo is greater than the upper limit (eg, 60V), the regulated feedback circuit 180 can output the feedback signal Vcom to the control circuit 140 through the isolation circuit OP1, so that the control circuit 140 turns off the switching element S1. .
在部分實施例中，二極體單元D1可用以防止電流逆向流出至電源轉換裝置100的輸出端，以避免對電源轉換裝置100或後級負載造成損壞。相似地，分壓電阻R1、R2可選用適當阻值的電子元件，藉此調整流經隔離電路OP1的副邊側的電流I1的大小。In some embodiments, the diode unit D1 can be used to prevent current from flowing back to the output of the power conversion device 100 to avoid damage to the power conversion device 100 or the rear stage load. Similarly, the voltage dividing resistors R1, R2 may be selected with electronic components of appropriate resistance, thereby adjusting the magnitude of the current I1 flowing through the secondary side of the isolation circuit OP1.
藉此，當電流I1流經隔離電路OP1的副邊側時，隔離電路OP1便可根據電流I1，相應導通原邊側的電氣迴路，例如導通隔離電路OP1內部的光敏三極體，以將訊號傳遞到原邊側並將控制電路140的腳位COM的電壓準位拉低，使得腳位COM的電壓準位低於其最低操作電壓。Therefore, when the current I1 flows through the secondary side of the isolation circuit OP1, the isolation circuit OP1 can respectively conduct the electrical circuit on the primary side according to the current I1, for example, the photosensitive triode inside the isolation circuit OP1 to turn on the signal. The voltage level is transmitted to the primary side and the voltage level of the pin COM of the control circuit 140 is pulled low, so that the voltage level of the pin COM is lower than its lowest operating voltage.
具體來說，隔離電路OP1可選用具有適當電流傳輸比(Current-Transfer- Ratio，CTR)的光耦合器元件實現，並根據其電流傳輸比搭配適當的分壓電阻R1、R2。Specifically, the isolation circuit OP1 can be implemented by an optical coupler element having a suitable current-transfer-ratio (CTR), and is matched with an appropriate voltage dividing resistor R1, R2 according to its current transmission ratio.
舉例來說，在部分實施例中，分壓電阻R2可選用大阻值的電阻元件，使得流經分壓電阻R2的電流可忽略。流經隔離電路OP1的副邊側的電流I1可表示為下式： For example, in some embodiments, the voltage dividing resistor R2 can be selected with a resistance element of a large resistance such that the current flowing through the voltage dividing resistor R2 is negligible. The current I1 flowing through the secondary side of the isolation circuit OP1 can be expressed as follows:
其中 代表齊納二極體單元ZD1兩端的跨壓， 代表二極體單元D1順向導通時兩端的跨壓。如此一來，穩壓回授電路180便可搭配隔離電路OP1的電流傳輸比，選用適當阻值的分壓電阻R1、R2，調整隔離電路OP1兩側的電流大小，以提供原邊側適當的下拉電流將腳位COM的電壓準位拉低。 among them Representing the cross-pressure at the ends of the Zener diode unit ZD1, It represents the voltage across the two ends of the diode unit D1. In this way, the voltage feedback feedback circuit 180 can be matched with the current transmission ratio of the isolation circuit OP1, and the voltage divider resistors R1 and R2 with appropriate resistance values are selected to adjust the current on both sides of the isolation circuit OP1 to provide an appropriate side of the primary side. The pull-down current pulls the voltage level of the pin COM low.
如此一來，控制電路140便會進入保護模式，停止輸出脈衝寬度調變的控制訊號CT1至開關元件S1，開關元件S1便會相應關斷。藉此，電源轉換裝置100的輸出電壓Vo便會逐漸降低，進而確保輸出電壓Vo不超過其安全規範欲設定的上限值(如：60V)，使得電源轉換裝置100可滿足安全規範的規格。In this way, the control circuit 140 enters the protection mode, stops the output of the pulse width modulation control signal CT1 to the switching element S1, and the switching element S1 is turned off accordingly. Thereby, the output voltage Vo of the power conversion device 100 is gradually lowered, thereby ensuring that the output voltage Vo does not exceed the upper limit value (for example, 60 V) to be set by the safety specification, so that the power conversion device 100 can meet the specifications of the safety specification.
請參考第3圖。第3圖為根據本案其他部分實施例所繪示的電源轉換裝置100的示意圖。如第3圖所示，在部分實施例中，穩壓回授電路180更包含分壓單元184和穩壓器單元TL1。在結構上，分壓單元184電性耦接於副邊電路160與副邊接地端之間。穩壓器單元TL1的陰極端電性耦接於隔離電路OP1的副邊側之第二輸入端以及分壓電阻R2的第二端。穩壓器單元TL1的陽極端電性耦接於副邊接地端。穩壓器單元TL1的參考端電性耦接於分壓單元184。Please refer to Figure 3. FIG. 3 is a schematic diagram of a power conversion device 100 according to other embodiments of the present disclosure. As shown in FIG. 3, in some embodiments, the regulated feedback circuit 180 further includes a voltage dividing unit 184 and a voltage regulator unit TL1. Structurally, the voltage dividing unit 184 is electrically coupled between the secondary circuit 160 and the secondary ground. The cathode end of the voltage regulator unit TL1 is electrically coupled to the second input end of the secondary side of the isolation circuit OP1 and the second end of the voltage dividing resistor R2. The anode end of the regulator unit TL1 is electrically coupled to the secondary ground terminal. The reference terminal of the voltage regulator unit TL1 is electrically coupled to the voltage dividing unit 184.
具體來說，分壓單元184包含分壓電阻R3、R4。分壓電阻R3的第一端電性耦接於副邊電路160的輸出端，分壓電阻R3的第二端電性耦接於穩壓器單元TL1的參考端。分壓電阻R4的第一端電性耦接於分壓電阻R3的第二端，分壓電阻R4的第二端電性耦接於副邊接地端。Specifically, the voltage dividing unit 184 includes voltage dividing resistors R3 and R4. The first end of the voltage dividing resistor R3 is electrically coupled to the output end of the secondary circuit 160, and the second end of the voltage dividing resistor R3 is electrically coupled to the reference end of the voltage regulator unit TL1. The first end of the voltage dividing resistor R4 is electrically coupled to the second end of the voltage dividing resistor R3, and the second end of the voltage dividing resistor R4 is electrically coupled to the ground side of the secondary side.
在部分實施例中，穩壓器單元TL1可透過其參考端之參考電壓Vref，並根據分壓單元182調整第一電流I1，以控制輸出電壓Vo的電壓準位。具體來說，如第3圖所示，穩壓器單元TL1可為三端穩壓器。當穩壓器單元TL1的參考端的電壓約等於其基準值(如：2.5V)時，穩定的電流I1流經穩壓器單元TL1。若當前參考端的電壓偏離基準值(如：2.5V)時，流經穩壓器單元TL1的電流I1也會隨之提高或降低。如此一來，透過負回饋的電路設計，穩壓器單元TL1便可確保參考電壓Vref的電壓準位穩定在其基準值(如：2.5V)。In some embodiments, the voltage regulator unit TL1 can pass the reference voltage Vref of its reference terminal and adjust the first current I1 according to the voltage dividing unit 182 to control the voltage level of the output voltage Vo. Specifically, as shown in FIG. 3, the regulator unit TL1 can be a three-terminal regulator. When the voltage at the reference terminal of the regulator unit TL1 is approximately equal to its reference value (eg, 2.5V), the stable current I1 flows through the regulator unit TL1. If the current reference voltage deviates from the reference value (eg, 2.5V), the current I1 flowing through the regulator unit TL1 will also increase or decrease. In this way, through the circuit design of the negative feedback, the voltage regulator unit TL1 can ensure that the voltage level of the reference voltage Vref is stabilized at its reference value (for example, 2.5V).
藉此，藉由選用適當阻值的分壓電阻R1與隔離電路OP1，當輸出電壓Vo大於上限值導致齊納二極體單元ZD1逆向導通時，流經穩壓器單元TL1的電流I1便可滿足穩壓器單元TL1所需的啟動電流(如：1mA)，使得穩壓器單元TL1啟動分流機制，將參考端的參考電壓Vref控制於基準值(如：2.5V)。Therefore, by selecting the appropriate voltage divider resistor R1 and the isolation circuit OP1, when the output voltage Vo is greater than the upper limit value, the Zener diode unit ZD1 is reversely turned on, and the current I1 flowing through the regulator unit TL1 is used. The startup current required by the regulator unit TL1 (for example, 1 mA) can be made, so that the voltage regulator unit TL1 starts the shunting mechanism, and the reference voltage Vref of the reference terminal is controlled to a reference value (for example, 2.5 V).
由於分壓單元184透過分壓電阻R3、R4進行分壓，參考電壓Vref與輸出電壓Vo存在比例關係。因此輸出電壓Vo的電壓準位因穩壓器單元TL1提供穩定的參考電壓Vref，而穩定在相應的電壓準位。舉例來說，若以穩壓器單元TL1的基準值為2.5V、輸出電壓Vo的目標值為55V，則可選擇適當的分壓電阻R3、R4，使其滿足以下公式： Since the voltage dividing unit 184 divides the voltage through the voltage dividing resistors R3 and R4, the reference voltage Vref is proportional to the output voltage Vo. Therefore, the voltage level of the output voltage Vo is stabilized at the corresponding voltage level by the regulator unit TL1 providing a stable reference voltage Vref. For example, if the reference value of the regulator unit TL1 is 2.5V and the target value of the output voltage Vo is 55V, the appropriate voltage dividing resistors R3 and R4 can be selected to satisfy the following formula:
如此一來，透過選擇適當阻值的分壓電阻R3、R4，便可進一步確保輸出電壓Vo被控制在目標的電壓準位(如：55V)。藉此，電源轉換裝置100便可提供穩定的輸出電壓Vo給後端負載。In this way, by selecting the voltage divider resistors R3 and R4 of appropriate resistance, it is further ensured that the output voltage Vo is controlled to the target voltage level (eg, 55V). Thereby, the power conversion device 100 can provide a stable output voltage Vo to the back end load.
請參考第4圖。第4圖為根據本案部分實施例所繪示的電源轉換裝置100的示意圖。如第4圖所示，在部分實施例中，變壓器T1更包含輔助繞組Na。電源轉換裝置100更包含分壓單元130。在結構上，分壓單元130電性耦接輔助繞組Na的第一端與原邊接地端之間。Please refer to Figure 4. FIG. 4 is a schematic diagram of a power conversion device 100 according to some embodiments of the present disclosure. As shown in FIG. 4, in some embodiments, the transformer T1 further includes an auxiliary winding Na. The power conversion device 100 further includes a voltage dividing unit 130. Structurally, the voltage dividing unit 130 is electrically coupled between the first end of the auxiliary winding Na and the primary ground.
在部分實施例中，分壓單元130用以輸出回授電壓Vfb至控制電路140的腳位FB，使得控制電路140根據回授電壓Vfb調節控制訊號CT1的責任週期。In some embodiments, the voltage dividing unit 130 is configured to output the feedback voltage Vfb to the pin FB of the control circuit 140, so that the control circuit 140 adjusts the duty cycle of the control signal CT1 according to the feedback voltage Vfb.
具體來說，分壓單元130包含分壓電阻R5、R6。分壓電阻R5的第一端電性耦接於輔助繞組Na，分壓電阻R5的第二端電性耦接於控制電路140的腳位FB。分壓電阻R6的第一端電性耦接於分壓電阻R5的第二端，分壓電阻R6的第二端電性耦接於原邊接地端。如此一來，分壓單元130便可對輔助繞組Na的電壓進行分壓以提供回授電壓Vfb。Specifically, the voltage dividing unit 130 includes voltage dividing resistors R5 and R6. The first end of the voltage dividing resistor R5 is electrically coupled to the auxiliary winding Na, and the second end of the voltage dividing resistor R5 is electrically coupled to the pin FB of the control circuit 140. The first end of the voltage dividing resistor R6 is electrically coupled to the second end of the voltage dividing resistor R5, and the second end of the voltage dividing resistor R6 is electrically coupled to the grounding end of the primary side. In this way, the voltage dividing unit 130 can divide the voltage of the auxiliary winding Na to provide the feedback voltage Vfb.
藉此，在輸出電壓Vo沒有超出上限值，控制電路140的腳位COM的電壓準位沒有被下拉電流拉低的狀態下，控制電路140可透過相應於原邊側的輔助繞組Na的電壓之回授電壓Vfb進行回授控制，增加或減少控制訊號CT1的責任週期，以輸出適當電壓準位的輸出電壓Vo。如此一來，在正常的操作狀態下，電源轉換裝置100便不需另外由副邊側回授輸出電壓Vo的取樣訊號至原邊側以調整控制訊號CT1。Thereby, in a state where the output voltage Vo does not exceed the upper limit value and the voltage level of the pin COM of the control circuit 140 is not pulled down by the pull-down current, the control circuit 140 can transmit the voltage corresponding to the auxiliary winding Na corresponding to the primary side. The feedback voltage Vfb is subjected to feedback control to increase or decrease the duty cycle of the control signal CT1 to output an output voltage Vo of an appropriate voltage level. In this way, in the normal operating state, the power conversion device 100 does not need to separately feed back the sampling signal of the output voltage Vo to the primary side to adjust the control signal CT1.
請參考第5圖。第5圖為根據本案部分實施例所繪示的電源轉換裝置100的示意圖。如第5圖中所示，在部分實施例中，整流電路120可由各種橋式整流電路實現。Please refer to Figure 5. FIG. 5 is a schematic diagram of a power conversion device 100 according to some embodiments of the present disclosure. As shown in FIG. 5, in some embodiments, the rectifier circuit 120 can be implemented by various bridge rectifier circuits.
舉例來說，整流電路120可包含二極體單元D3、D4、D5、D6所組成的橋式電路。具體來說，二極體單元D3的陽極端電性耦接於交流電壓Vac的第一輸入端，二極體單元D3的陰極端電性耦接於電容單元Cin的第一端。二極體單元D4的陽極端電性耦接於電容單元Cin的第二端，二極體單元D4的陰極端電性耦接於二極體單元D3的陽極端。二極體單元D5的陽極端電性耦接於交流電壓Vac的第二輸入端，二極體單元D5的陰極端電性耦接於電容單元Cin的第一端。二極體單元D6的陽極端電性耦接於電容單元Cin的第二端，二極體單元D6的陰極端電性耦接於二極體單元D5的陽極端。For example, the rectifier circuit 120 can include a bridge circuit composed of diode units D3, D4, D5, and D6. Specifically, the anode end of the diode unit D3 is electrically coupled to the first input end of the AC voltage Vac, and the cathode end of the diode unit D3 is electrically coupled to the first end of the capacitor unit Cin. The anode end of the diode unit D4 is electrically coupled to the second end of the capacitor unit Cin, and the cathode end of the diode unit D4 is electrically coupled to the anode end of the diode unit D3. The anode end of the diode unit D5 is electrically coupled to the second input end of the AC voltage Vac, and the cathode end of the diode unit D5 is electrically coupled to the first end of the capacitor unit Cin. The anode end of the diode unit D6 is electrically coupled to the second end of the capacitor unit Cin, and the cathode end of the diode unit D6 is electrically coupled to the anode end of the diode unit D5.
藉此，整流電路120便可接收交流電壓Vac，透過二極體單元D3、D4、D5、D6對交流電壓Vac進行整流，並透過電容單元Cin對整流後的電壓訊號進行濾波處理，以輸出直流電壓Vin。Thereby, the rectifier circuit 120 can receive the AC voltage Vac, rectify the AC voltage Vac through the diode units D3, D4, D5, and D6, and filter the rectified voltage signal through the capacitor unit Cin to output DC. Voltage Vin.
此外，如第5圖所示，在不衝突的情況下，在本揭示內容第1圖~第4圖中所繪示的實施例及實施例中的特徵與電路可以相互組合。因此，圖式中所繪示的電路僅為示例之用，係簡化以使說明簡潔並便於理解，並非用以限制本案。Further, as shown in FIG. 5, the features and circuits in the embodiments and the embodiments illustrated in FIGS. 1 to 4 of the present disclosure may be combined with each other without conflict. Therefore, the circuit illustrated in the drawings is for illustrative purposes only, and is simplified for simplicity and ease of understanding, and is not intended to limit the present invention.
綜上所述，在本案各個實施例中，電源轉換裝置100可透過穩壓回授電路180中的齊納二極體單元ZD1以及分壓單元182，於輸出電壓Vo大於上限值時產生流經隔離電路OP1的副邊側的電流I1。藉此，隔離電路OP1便可於原邊側相應提供回授訊號Vcom至控制電路140，以將控制電路140的腳位COM的電壓準位拉低。如此一來，控制電路140便可進入保護模式，停止輸出脈衝寬度調變訊號，使得開關元件S1相應關斷，進而降低輸出電壓Vo，使得電源轉換裝置100可滿足安全規範的規格。此外，在部分實施例中，穩壓回授電路180亦可進一步透過分壓單元184與穩壓器單元TL1的協同操作，將輸出電壓Vo維持在目標的電壓準位，以達到穩定電壓輸出的效果。In summary, in various embodiments of the present invention, the power conversion device 100 can pass through the Zener diode unit ZD1 and the voltage dividing unit 182 in the voltage stabilization feedback circuit 180 to generate a flow when the output voltage Vo is greater than the upper limit value. The current I1 on the secondary side of the isolation circuit OP1. Thereby, the isolation circuit OP1 can provide the feedback signal Vcom to the control circuit 140 on the primary side to lower the voltage level of the pin COM of the control circuit 140. In this way, the control circuit 140 can enter the protection mode, stop outputting the pulse width modulation signal, so that the switching element S1 is turned off correspondingly, thereby reducing the output voltage Vo, so that the power conversion device 100 can meet the specifications of the safety specification. In addition, in some embodiments, the voltage feedback feedback circuit 180 can further maintain the output voltage Vo at a target voltage level through the cooperative operation of the voltage dividing unit 184 and the voltage regulator unit TL1 to achieve stable voltage output. effect.
雖然本揭示內容已以實施方式揭露如上，然其並非用以限定本揭示內容，任何熟習此技藝者，在不脫離本揭示內容之精神和範圍內，當可作各種更動與潤飾，因此本揭示內容之保護範圍當視後附之申請專利範圍所界定者為準。The present disclosure has been disclosed in the above embodiments, and is not intended to limit the disclosure, and the present disclosure may be variously modified and retouched without departing from the spirit and scope of the present disclosure. The scope of protection of the content is subject to the definition of the scope of the patent application.
100‧‧‧電源轉換裝置100‧‧‧Power conversion device
120‧‧‧整流電路120‧‧‧Rectifier circuit
130‧‧‧分壓單元130‧‧‧Dividing unit
140‧‧‧控制電路140‧‧‧Control circuit
160‧‧‧副邊電路160‧‧‧Secondary circuit
180‧‧‧穩壓回授電路180‧‧‧Vistorical feedback circuit
182、184‧‧‧分壓單元182, 184‧‧ ‧ partial pressure unit
Cin、Co‧‧‧電容單元Cin, Co‧‧‧ capacitor unit
D1、D2、D3、D4、D5、D6‧‧‧二極體單元D1, D2, D3, D4, D5, D6‧‧‧ diode units
R1、R2、R3、R4、R5、R6‧‧‧分壓電阻R1, R2, R3, R4, R5, R6‧‧‧ voltage divider resistors
TL1‧‧‧穩壓器單元TL1‧‧‧ voltage regulator unit
ZD1‧‧‧齊納二極體單元ZD1‧‧‧Zina diode unit
OP1‧‧‧隔離電路OP1‧‧‧Isolation circuit
S1‧‧‧開關元件S1‧‧‧ switching components
T1‧‧‧變壓器T1‧‧‧ transformer
Np‧‧‧一次側繞組Np‧‧‧ primary winding
Ns‧‧‧二次側繞組Ns‧‧‧ secondary winding
Na‧‧‧輔助繞組Na‧‧‧Auxiliary winding
COM、FB‧‧‧腳位COM, FB‧‧‧ feet
CT1‧‧‧控制訊號CT1‧‧‧ control signal
Vcom‧‧‧回授訊號Vcom‧‧‧ feedback signal
Vfb‧‧‧回授電壓Vfb‧‧‧ feedback voltage
Vref‧‧‧參考電壓Vref‧‧‧reference voltage
Vac‧‧‧交流電壓Vac‧‧‧AC voltage
Vin‧‧‧直流電壓Vin‧‧‧DC voltage
Vo‧‧‧輸出電壓Vo‧‧‧ output voltage
I1‧‧‧電流I1‧‧‧ Current
第1圖為根據本案部分實施例所繪示的電源轉換裝置的示意圖。 第2圖為根據本案部分實施例所繪示的電源轉換裝置的操作示意圖。 第3圖為根據本案其他部分實施例所繪示的電源轉換裝置的示意圖。 第4圖為根據本案其他部分實施例所繪示的電源轉換裝置的示意圖。 第5圖為根據本案其他部分實施例所繪示的電源轉換裝置的示意圖。FIG. 1 is a schematic diagram of a power conversion device according to some embodiments of the present disclosure. FIG. 2 is a schematic diagram of the operation of the power conversion device according to some embodiments of the present disclosure. FIG. 3 is a schematic diagram of a power conversion device according to other embodiments of the present disclosure. FIG. 4 is a schematic diagram of a power conversion device according to other embodiments of the present disclosure. FIG. 5 is a schematic diagram of a power conversion device according to other embodiments of the present disclosure.
Claims (13)
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| TW106133641A TWI645657B (en) | 2017-09-29 | 2017-09-29 | Power conversion device and voltage regulating feedback circuit |
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| TW201916555A TW201916555A (en) | 2019-04-16 |
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Citations (4)
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|---|---|---|---|---|
| US20060209581A1 (en) * | 2005-03-18 | 2006-09-21 | Sidley Austin Brown & Wood Llp | Terminal for multiple functions in a power supply |
| TW201424216A (en) * | 2012-12-05 | 2014-06-16 | Richtek Technology Corp | Voltage converter circuit and voltage converter controller |
| TW201607227A (en) * | 2014-06-19 | 2016-02-16 | 立錡科技股份有限公司 | Flyback power supply circuit with programmable function and control method thereof |
| TW201620238A (en) * | 2014-11-18 | 2016-06-01 | 立錡科技股份有限公司 | Flyback power converter, secondary side control circuit, and control method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060209581A1 (en) * | 2005-03-18 | 2006-09-21 | Sidley Austin Brown & Wood Llp | Terminal for multiple functions in a power supply |
| TW201424216A (en) * | 2012-12-05 | 2014-06-16 | Richtek Technology Corp | Voltage converter circuit and voltage converter controller |
| TW201607227A (en) * | 2014-06-19 | 2016-02-16 | 立錡科技股份有限公司 | Flyback power supply circuit with programmable function and control method thereof |
| TW201620238A (en) * | 2014-11-18 | 2016-06-01 | 立錡科技股份有限公司 | Flyback power converter, secondary side control circuit, and control method thereof |
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