1275235 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種電源轉換器，特別是指一種可供 應大電流輸出且符合高功率要求的改良型返驰式（Fly Back) 電源供應裝置，尤其適合於大銀幕之液晶電視（lcd τν)、 電漿電視（PDP TV)及液晶螢幕（LCD MONit〇r)之電源供應 器（Power Supply)之量產應用。 【先前技術】1275235 IX. Description of the Invention: [Technical Field] The present invention relates to a power converter, and more particularly to an improved flyback power supply device capable of supplying a large current output and meeting high power requirements It is especially suitable for mass production applications of large screen LCD TVs (lcd τν), plasma TV (PDP TV) and liquid crystal screen (LCD MONit〇r) power supplies. [Prior Art]
河作為交流/直流（AC to DC)轉換的 主要區分為線性式和交換式電源供應裝置兩種技術，線性 式電源供應裝置是使用大電流變壓器， 無法直接安裝在電路板上，且轉換效率低，、故發=有 效率尚、耗電小及重量輕等優點之切換式電源供應技術， 书見的切換式電源供應裝置有高功率輸出（約働瓦）之推挽 式（Push㈣）、中低輸出功率（數瓦〜15〇瓦）之返驰式 back)等類型。 > _ ，見有的返驰式電源供應裝置9為例，1呈 有-輸人級（Input stage)電路91、—功因調整⑽赠 P.F.C.)電路92、一返馳式轉換電路们及一回饋 電路（Feedback Circuit)94。 、 其中’輸人級電路91是由濾波器、橋式整流電路等元 細未示)所構成；功因調整電路92用以減少諧波發生並 調整功率因素(P，factor)以提高電力之使用效率；回饋 電路94是將輸出電壓麵合至返驰式轉換電路93作比較以 5 1275235 _ 得到較精確的直流輸出。 - 參閱圖1與圖2，返馳式轉換電路93具有一保護電路 ,、 930、一功率開關元件931、一變壓器932、一整流二極體 933、一濾波元件 934及一波寬調整（Pulse Width Modulation; PWM)控制器 935。 波寬調整控制器935根據回饋電路94之回饋訊號輸出 ~ 一脈波訊號控制功率開關元件931(如：M0SFET)在一導通 期及一非導通期作切換，並以調整脈波寬度的方式控制輸 # 出電壓。 變壓器932具有一初級側936及一次級側937，初級側 936具有隔離、變壓與儲能的多種功能，藉由功率開關元件 931的開關作用，當處於導通期（如：M0SFET導通）時，電 壓將供應予初級側936，次級側937感應並儲存能量，而於 非導通期（如：M0SFET截止）時，初級側936將儲存的能量 傳遞給次級側937供應電流82輸出。 保護電路930是用以箝制電壓、防止突波（spike)發生以 # 避免功率開關元件931受損害；整流二極體933是將次級 " 側937的電壓轉換為直流電，再經過濾波元件934濾除漣 波成分且輸出電流82，且該電流82僅在半週期（非導通期） _ 供應輸出。 , 在返驰式電源供應裝置9的應用方面，如電腦監視器 或電視機最重要的兩個元件，除了陰極射線管之外，另外 就是返馳式電源供應裝置9 了；然而，隨著液晶薄膜顯示 器（TFT LCD)技術的精進，更大的尺寸被應用於大銀幕的液The main distinction between AC and DC (AC to DC) conversion is linear and switched power supply. The linear power supply uses high current transformers, cannot be directly mounted on the board, and has low conversion efficiency. Switching power supply technology with advantages of efficiency, low power consumption and light weight. The switch-type power supply device of the book has a high-power output (about wa) push-pull type (Push (four)), medium Low output power (several watts ~ 15 watts) back-type back) and other types. > _ , see some of the flyback power supply device 9 as an example, 1 is an input stage input circuit 91, a power factor adjustment (10) gift PFC circuit 92, a flyback conversion circuit and A feedback circuit 94. The 'input-level circuit 91 is composed of a filter, a bridge rectifier circuit, etc., and the power factor adjustment circuit 92 is used to reduce harmonic generation and adjust the power factor (P, factor) to improve power. The efficiency of the use; the feedback circuit 94 is to combine the output voltage to the flyback converter circuit 93 for comparison to obtain a more accurate DC output of 5 1275235 _. Referring to FIG. 1 and FIG. 2, the flyback conversion circuit 93 has a protection circuit, 930, a power switching element 931, a transformer 932, a rectifying diode 933, a filtering element 934, and a wave width adjustment (Pulse). Width Modulation; PWM) controller 935. The wave width adjustment controller 935 controls the power switching element 931 (eg, MOSFET) to switch between an on period and a non-conduction period according to the feedback signal output of the feedback circuit 94, and is controlled by adjusting the pulse width. The output voltage. The transformer 932 has a primary side 936 and a primary side 937. The primary side 936 has various functions of isolation, voltage transformation and energy storage. When the switching function of the power switching element 931 is in the conduction period (eg, the MOSFET is turned on), The voltage will be supplied to the primary side 936, which senses and stores energy, while during the non-conduction period (e.g., the MOSFET is turned off), the primary side 936 transfers the stored energy to the secondary side 937 to supply the current 82 output. The protection circuit 930 is used to clamp the voltage, prevent the occurrence of a spike to prevent the power switching element 931 from being damaged; the rectifying diode 933 converts the voltage of the secondary " side 937 into direct current, and then passes through the filtering element 934. The chopping component is filtered out and the current 82 is output, and the current 82 is only output during a half cycle (non-conduction period). In the application of the flyback power supply device 9, for example, the two most important components of a computer monitor or a television set, in addition to the cathode ray tube, is a flyback power supply device 9; however, with the liquid crystal The advancement of thin film display (TFT LCD) technology, the larger size is applied to the liquid of the large screen
1275235 曰日*'員示170，而大銀幕的液晶顯示器需中高功率（> 150瓦）以 及較大輸出電流之電源供應裝置，以現有的馳返式電源供 應裝置9作為電源供應（數瓦〜150瓦）顯然不足。 般阿功率的電源供應裝置具有價格昂貴及電路複雜 等缺點’假設要以電路簡易且較便宜的驰返式電源供應裝 置9作為電源供應，需要符合高功率規格的功率開關元件 931然而付合此種高功率規格的功率開關元件931不但體 積艾大且更為昂責’讓生產成本無法降低。 【發明内容】 父於以往的m轉換餘僅能在半㈣（料通期） 供=流輪出，而在另外的半週期（導通期）則未有電流輸出 期及=的概念即是令返驰式轉換模組在全週期（包含導通 / k通期）均有電流輸出以符合高功率產品之需求。 另外’相較於以往的高功率電源轉換 ::路)造價昂貴，本發明是以返咖奐電：^ ::增加少數電子元件，由於造價低、線路簡▼，可達： 1產時所需之低成本及高功率輸出要求。 1違到 方；疋，本發明之一目的， 一 通期及非導通期）王週期（包含導 置及電源供應裝置，以及提供一種使用低功二 ，亦可；查$丨1古丄* , 午之開關元件 。 ㈣率輪出要求之改良型返驰式電源供應裝置 本發明改良型返馳式電 由该控制器控制導通與否的 源供應裝置包含一控制器 開關元件、一第— 轉換電路及 7 1275235 一第二轉換電路，該控制器用以控制該開關元件於一導通 期與一非導通期作切換。 第胃轉換电路具有一受該開關元件控制電流通與否之 第一變壓裔，且該控制器控制該開關元件使該第一變壓哭 於該产導通期與非導通期其中之一期間輸出一第一電流。口0 —弟一轉換電路具有一受該開關元件控制電流通與否之 第又>£口〇帛一變壓器之初級側係與第一變塵器之初級 側串聯’第二變壓器之次級側與第一變壓器之次級側並聯 =連接it出立而，且第二變壓器於該導通期與非導通期其 中之另一期間輸出一第二電汽 划盥11* 使侍該輸出端於該非導通 和#通期父互輸出第—電流與第二電流。 型返目的’即在提供一種多電流輸出之改良 t返驰，源供應裝置及電源供應裝置。 於是，本發明改良型 可設置二組以上.欠級〜日％“源供應裝置的各變壓器 、·及，丸、、且，且各變壓器 別連接有對應的輸出端。 人威繞組分 其中一種多電流輸出之實施態樣 返驰式電源供應裝置的第二變麼哭且有—述的改良型 第二變厂堅器的各該次級繞组分:二繞組’且 Z $輪出端於該導通期與該非乐 电流與-第二電流之輪出，藉此一二供應 非導通斯與該導通期其中之—期間供應第二端於該 另~種多電流輸出之實 0 K輸出。 馬也式電源供應裝置的’疋令前述的改良型返 置的弟1愿器、第二變屬器各具有二： 8 Ϊ275235 次級繞組，且第一變壓器的各該次級繞組分別連接一第一 輪出端及-第二輸出端，第一輸出端及第二輪出端亦分別 連接第二變麼器的各該次級繞組，藉此，第—輪出端及第 二輸出端均能於該非導通期與該導通期交互輸出第一電流 與第二電流。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之數個較佳實施例的詳細說明中，將可 /月邊的呈現。在本發明被詳細描述之前，要注意的是，在 以下的說明内容中，類似的元件是以相同的編號來表示。 、參閱圖3,本發明的設計概念在於：除了現有返馳式電 源供應裝置之一波寬調整控制器1〇、一保護電路⑹卿 CircuiGU、一開關元件（以M〇SFET表示口2、一蓄能元件 16、一輸入級電路31、一功因調整電路32、一回饋電路幻 X及第轉換電路1之外，本發明的改良型返馳式電源 供應裝置100更具有一第二轉換電路2。 刖述的波寬調整控制器10、保護電路（aamp Circuit)^ 、開關元件（以MOSFET表示）12、蓄能元件16、輸入級電 路31、功因調整電路32、回饋電路％以及第—轉換電路丄 是一般返驰式電源供應裝置已知的元件，且在先前技術中 已作介紹，在此不再說明其原理。 本發明之改良概念，是以現有的返驰式電源轉換電路 為基礎’並配合改良增加電路元件（第二轉換電路2)，藉此 達到王週期期間（包含導通期及非導通期）均有電流輸出的需 9 1275235 求。 如圖3、圖4所示，說明本發 w inn ^ - 月的改良型返馳式電源供 w、置100的弟一較佳實施例， ^ ^ ^ 1 θ . 孕乂仫只苑例中，第一轉 換电路1具有一第一變壓器13、一 件·甘+ 正/成兀件以及一濾波元 件15，其中，整流元件14 杜Η 正",L 一極體表示，濾波元 件15疋以一電容器表示。 參考先前技術的說明，第一蠻壓哭 伽欠&态13的電流轉換原理1275235 The next day*'s staff 170, while the large screen LCD monitor requires medium to high power (> 150 watts) and a large output current power supply unit, with the existing flyback power supply unit 9 as the power supply (several watts) ~150 watts) is obviously insufficient. The power supply device of the general power has the disadvantages of being expensive and complicated in circuit. It is assumed that the power supply device 9 that is simple and cheaper is used as the power supply, and the power switching element 931 that meets the high power specification is required. A high-power specification of the power switching element 931 is not only bulky but also more blame-making production costs cannot be reduced. [Summary of the Invention] The father's previous m-conversion can only be used in the half (four) (feeding period) for the = flow, while in the other half cycle (the conduction period) there is no current output period and the concept of = is the return The Chi converter module has a current output during the full cycle (including the on/k pass period) to meet the needs of high power products. In addition, compared with the previous high-power power conversion:: road, the cost is expensive, the invention is based on the return of the coffee: ^ :: increase a small number of electronic components, due to low cost, simple line, up to: 1 at the time of production Low cost and high power output requirements. 1 violation of the party; 疋, one of the purposes of the present invention, a one-cycle and non-conduction period) of the king cycle (including the guide and power supply device, and provide a use of low-power two, can also; check $ 丨 1 ancient 丄 *, The switching element of the noon. (4) The improved return-type power supply device with the requirement of the turn-off. The source device of the improved fly-back type control of the present invention is controlled by the controller, and includes a controller switching element, a first conversion The circuit and the 7 1275235 a second conversion circuit, the controller is configured to control the switching element to switch between a conduction period and a non-conduction period. The first stomach conversion circuit has a first voltage transformation controlled by the switching element to control current conduction. And the controller controls the switching element to cause the first variable voltage to cry during the one of the conduction period and the non-conduction period to output a first current. The port 0-the conversion circuit has a control by the switching element The current is passed or not. The primary side of the transformer is connected in series with the primary side of the first dust collector. The secondary side of the second transformer is connected in parallel with the secondary side of the first transformer. Stand up And the second transformer outputs a second electric steam stroke 11* during the other of the conduction period and the non-conduction period, so that the output terminal outputs the first current and the second current to the non-conducting and the non-passing period. The purpose of returning is to provide an improved t-return of multi-current output, a source supply device and a power supply device. Thus, the improved type of the present invention can be provided with two or more sets of under-to-day % "source-supply devices, And, the pill, and, and each transformer is connected with a corresponding output. The second change of the multi-current output of the multi-current output is the second change of the power supply device. Each of the secondary windings of the second transformer is divided into two windings, and the Z$ wheel end is in the conduction period and the non-leine current and the second current are rotated, thereby providing a non-conducting pair During the conduction period, the second end is supplied with the actual 0 K output of the other multi-current output. The Ma-type power supply device's "the above-mentioned improved return-type brother 1 and the second change" Each has two: 8 Ϊ 275235 secondary winding And each of the secondary windings of the first transformer is respectively connected to a first round output end and a second output end, and the first output end and the second round output end are also respectively connected to the secondary windings of the second transformer, Thereby, the first wheel output end and the second output end can mutually output the first current and the second current during the non-conduction period and the conduction period. [Embodiment] The foregoing and other technical contents, features and effects of the present invention are related to the present invention. In the following detailed description of several preferred embodiments with reference to the drawings, the presentation of the available/monthly. Before the present invention is described in detail, it is noted that in the following description, similar elements Referring to FIG. 3, the design concept of the present invention is: in addition to the existing flyback power supply device, a bandwidth adjustment controller 1〇, a protection circuit (6), a CircuiGU, a switching element ( The M返SFET represents a port 2, an energy storage element 16, an input stage circuit 31, a power factor adjustment circuit 32, a feedback circuit X and a conversion circuit 1, and the improved flyback power supply device of the present invention 100 more A second conversion circuit 2. The bandwidth adjustment controller 10, the protection circuit (aamp circuit), the switching element (denoted by the MOSFET) 12, the energy storage element 16, the input stage circuit 31, the power factor adjustment circuit 32, the feedback circuit %, and the first conversion The circuit 丄 is a known component of a general flyback power supply device and has been described in the prior art, and its principle will not be described here. The improved concept of the present invention is based on the existing flyback power conversion circuit and is combined with an improved circuit component (second conversion circuit 2), thereby achieving a king cycle period (including a conduction period and a non-conduction period). The current output needs 9 1275235. As shown in FIG. 3 and FIG. 4, a preferred embodiment of the modified flyback power supply for w inn ^ - month for w and set 100, ^ ^ ^ 1 θ is described. The first conversion circuit 1 has a first transformer 13, a piece of positive and negative components, and a filter element 15, wherein the rectifying element 14 is &", L is a polar body, and the filter element is 疋Expressed as a capacitor. Referring to the description of the prior art, the principle of current conversion of the first barbarian damn & state 13
先則技術所提之返馳式電源轉 7平寻谀原理相類似，可於開關 兀件12的非導通期_SFET截止）時輸出一第一電流而 ’在此不再贅述其原理。 =同的疋，由於本較佳實施例的電源供應裴置1〇〇更 具^第二轉換電路2’因此可於導通期輸出-第二電流1〇2 ’精此，該返馳式電源供應裝置！⑽的輸出端可於非導通 』14導通期父互供應具有第一電流ι〇ι與第二電流之 總輸出電流1〇3。The technique of the flyback power supply is similar to that of the first embodiment, and a first current can be output when the non-conducting period _SFET of the switching element 12 is turned off. The principle will not be described herein. = the same, since the power supply device of the preferred embodiment has a second conversion circuit 2', it can be output during the on-time - the second current 1 〇 2 ', this flyback power supply Supply device! The output of (10) can supply a total output current of 1〇3 with the first current ι〇ι and the second current in the non-conducting period.
本較佳貫施例中，第二轉換電路2具有一第二變壓器 21 整流元件22及一歸位（Reset)單元23，第二變壓器 21之初級側211係與第一變壓器13之初級側131串聯，而 第二變壓器21之次級側212則與第一變壓器13之次級側 132並聯且連接一輸出端4i。 I听位單元23或稱箝位電路（clamp Circuit)，是由附于 第二變壓器21的一歸位側23〇、一二極體231及_電容器 232所組成’且歸位側23〇的極性剛好與第二變壓器21的 次級側212相同，歸位單元23的安排，是因為第二變壓器 10 1275235 21有電流流過就會儲存能量于其中，日夺間一久將造成飽和 所以而要歸位單元23作消磁動作，此一設計有下列幾項 優點： *⑴在非導通期，可將第二變壓器21之磁通（Flux)快速 歸令以p；^止S請壓ϋ之鐵心（C()re)飽和，並提高轉換率。 (2)限制並箝制開關元件12之工作電壓，使工作電壓處 於額定安全範圍内，以防止開關元件12及保護電路u(初In the preferred embodiment, the second conversion circuit 2 has a second transformer 21 rectifying element 22 and a reset unit 23, and the primary side 211 of the second transformer 21 and the primary side 131 of the first transformer 13 In series, the secondary side 212 of the second transformer 21 is connected in parallel with the secondary side 132 of the first transformer 13 and is connected to an output 4i. The I POS unit 23 or the clamp circuit is composed of a homing side 23 〇, a diode 231 and a _capacitor 232 attached to the second transformer 21 and the homing side 23 〇 The polarity is just the same as the secondary side 212 of the second transformer 21, and the homing unit 23 is arranged because the second transformer 10 1275235 21 has a current flowing to store energy therein, and the day-to-day sequel will cause saturation for a long time. The homing unit 23 performs the degaussing action. This design has the following advantages: (1) During the non-conduction period, the magnetic flux (Flux) of the second transformer 21 can be quickly returned to p; (C()re) saturates and increases the conversion rate. (2) Limiting and clamping the operating voltage of the switching element 12 so that the operating voltage is within the rated safety range to prevent the switching element 12 and the protection circuit u (initial)
級箝位電路）受到衝擊破壞。 (3)開關元件12於非導通期開始的瞬間，二極體23ι導 通’令第二變壓器21的初級側211視同短路，可確保值處 於馳返模式（Flyback M〇de)的穩定運作。 參閱圖5及圖7,改良型職式電源供應裝置ιι〇的開 關元件12于一導通期日_ 了⑷)，I VDS電壓為低電屍 ’此時初級電& 1G5(如圖7(b))不但提供電流給第—變壓器 13，供第-變壓器13儲存能量于其中；此時，相同的電&The level clamp circuit is damaged by the impact. (3) At the moment when the non-conduction period of the switching element 12 is turned on, the diode 23 ι is turned on, so that the primary side 211 of the second transformer 21 is regarded as being short-circuited to ensure stable operation of the return mode (Flyback M〇de). Referring to FIG. 5 and FIG. 7, the switching element 12 of the improved service power supply device ιι〇 is in a conduction period _ (4)), and the I VDS voltage is a low electric corpse 'this time primary electric & 1G5 (see Fig. 7(b) )) not only supplies current to the first transformer 13 for the first transformer 13 to store energy therein; at this time, the same electricity &
也流經第二變壓器21，由于第二變壓器21的電流轉換，； 將將第二變壓器21輪出的第-雷、、*，η ， 又土 糊ίΒ们罘一私* 1〇2(如圖7〇》經其次級 繞組212與整流二極體22送至輸出端41。 爹阅園6及 〜土必哪八電源供應裝置11〇 的開關元件12於非導通期時（如圖7(a))，此時波寬調整控 制器10不供應初級電流1〇5(如圖7(b))的輪出。此時由於^ -變壓器13能量的轉換，將儲存於第—變壓器13的能旦 轉換成第一電流101(如圖7(c))輸出，經由第一變壓器二白里 次級繞組132、整流二極體14釋放至輪出端41。。。 的 11 1275235 再參閱圖4及圖7，因此’由前述可知，輸出端〇的 哭-雨出電流103除了開關元件12於導通期時，由第二變塵 =21提供的第二電流102,另外再加上開關元件Μ於非 二ΓΪ時’由第一變壓器13所提供的第-電流101，故總 電流103(如® 7(e))在全週期（導通期加上非導通期）具 第一電流101及第二電流102的輸出。 開關元件12的VDS電壓波形及各電流1〇5、1〇1〜1〇3 的波形簡述如下： 7⑷：為開關元件12❸Vds電壓波形（刚），與_般馳 轉換器（Fly_backC0nverter)的Vds電壓波形無異。 7⑻：初級電流（Pri職y c職m)1()5的波形，當開關元 士 12開始導通時，初級電流⑽的波形開始以線性方式隨 =開始上升至最大值’然後開關元件12不導通，初級電 流歸零，另一個半週期開始。 州：為第-電流101的輸出波形，當開關元件12於 導通期時’輪出電流維持為零，料非導通期起始時，才 快速上升至最大，再慢慢隨時間遞減。 7⑷：為第二電流搬的輸出波形，其與初級電流郞 波形類似，當開關元件12於導通期時，其輸出隨時間開始 上升’配合初級㈣丽y)#j、次級(Se_dary)側阻數的不同 可得到初級電流1〇5的倍數關係。 7(e):為未經渡波的總輸出電流1Q3的波形，其平均輸 出電流為第-電流1〇1與第二電流1〇2的總和。 月’】 如圖8所示，本較佳實施例的一種電路連接方式，是 12 1275235 將功因調整電路32的輪出 + 韻出‘ 321電連接於第一變壓器13 的輸入端以構成導通迴路， 峪不冋於原本（圖4)是將功因調整 电路32的輸出端321是 σσ 甩運接方；畜能元件16及第二變壓 為21的輸入端構成的導通迴路。 參閱圖9，為本發明的筮-击 4 , β的弟一較佳貫施例，其具有的元件 概與弟一實施例（圖4)相同， 一 不同的疋將第一實施例中的第 一轉換電路2與第一韓拖帝攸^ ^ 乐褥換包路2互相調換位置。 荼閱圖1 〇 ’為本發明的莖— — 乃的弟二較佳實施例，主要是以第 一貫施例（圖4)為基礎，再拎 ^ ^ _ 口口、 炎丹立日加一輸出電路17，且第二變壓 °σ 21具有一組次級繞組212、2 Ί 2 々u 2 213，各次級繞組212、213 为別連接一第一輸出端411及一 次 弟一輸出端412，本較佳實 施例的第一輸出端411與第一管妳 、 ^ 貝靶例類似，於導通期與非導 通期交互供應第一電流1〇1盥 命 AA 9 /、弟一私流102的輸出，不同 的疋，本較佳實施例更具有 百弟一輸出端412可於導通期供 應一弟二電流102,的輸出。 本較佳實施例的輸出電路17具有—整流元件i7i及一 ，波疋件172’其功能類似整流元件22及渡波元件15，且 弟-輸出請與對應連接的第一變壓器13及第二變题哭 21間各串聯該整流元件171及並聯該渡波元件172，故除 了原本於導通期以第一輸出端411供應第二電流ι〇2外，亦 可另外於導通期以第二輸出端4 、 Ώ而412供應輸出一額外的第二 電流102’以達到多電流輸出的功能。 參閱圖U，為本發明的第四較佳實施例，主要是以第 -實施例（圖4)為基礎，增加—輸出電路18，且第二變壓器 13 1275235 21具有二組次級繞組212、213，第一變壓器13具有二組 次級繞組132、133，第二變壓器21的次級繞組212與第一 變壓器13的次級繞組132連接一第一輸出端41Γ，以及次 級繞組213與第一變壓器13的次級繞組133連接一第二輸 出端412〜 本較佳實施例的第一輸出端41Γ與第一實施例類似， ~ 於導通期與非導通期交互供應第一電流101與第二電流102 的輸出，不同的是，本較佳實施例更具有第二輸出端412’ • 可於導通期與非導通期交互供應第一電流101”與一第二電 流102”的輸出。 本較佳實施例的輸出電路18具有二整流元件181、182 及一濾波元件183，其功能類似整流元件22及濾波元件15 ，但可輸出第一電流101”及第二電流102’’，亦即，另外輸 出一總輸出電流103’以達到多電流輸出的功能。 歸納上述，本發明的改良型返馳式電源供應裝置100 在全週期（包含導通期及非導通期）均有電流輸出，不但具有 • 省電、高效率、高輸出功率、高輸出電流、低漣波等特性 ’ ，更具有降低成本的優點，尤其適合於大銀幕的液晶電視 (LCD TV)、電漿電視（PDP TV)及液晶螢幕（LCD Monitor)的 電源供應器（Power Supply)的量產應用。 惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵盖之範圍内。 14 1275235 圖式簡單說明】 圖 •圖1疋沉明現有的返馳式電源供應裝置的—電路方塊 81 2疋况明圖1的返驰式電源供應裝置具有的返驰式 轉換電路具有的各元件的-電路示意圖； W 3是說明本發明的改良型返馳式電源供應一 電路方塊圖； 一卜圖二〜兄明本發明的改良型返驰式電源供應裝置的第 季父佳實施例的一電路示意圖； 圖5是說明本發明的當 ^ y^ 帝攸- Θ的弟一較佳實施例於一導通期的一 私路不意圖； 圖6是說明本發明的第一 —電路示意圖； Μ”錄一“通期的 電路2 7疋6兄明本發明的第-較佳實施例具有的第-轉換 -路的-輸出《及各種電流之波形； 圖8是說明相較于第一 — 輪出# e 較乜貫鈀例的功因調整電路的 料）出糙是電連接於第二 出端是電連接於第π — 功因調整電路的輸 運接H變壓器以構成導通迴路； 圖9是說明本發明的冲_丨、 其第=:電路示意圖，相較於第-較佳實施例， 弟轉換電路與第二轉換電路之位置為互換； 三較==月本發明的改良型返驰式電源供應褒置的^ 苴了口 路 圖，相較於第一較佳竇竑如 其可另外輸出一第二電流以 …把例’ 延彳夕包流輸出的功能，·及 15 1275235Also flowing through the second transformer 21, due to the current conversion of the second transformer 21; the first transformer 21 will be rotated out of the first thunder, *, η, and the paste will be a private * 1 〇 2 (such as 7〇” is sent to the output terminal 41 via its secondary winding 212 and the rectifying diode 22. The switching element 12 of the power supply device 11〇 of the 6 园 6 and the earth 于 哪 于 ( ( ( ( ( ( ( ( ( ( ( a)), at this time, the wave width adjustment controller 10 does not supply the primary current 1 〇 5 (as shown in Fig. 7 (b)). At this time, due to the conversion of the energy of the transformer 13, it will be stored in the first transformer 13 The output can be converted into the first current 101 (as shown in FIG. 7(c)), and is discharged to the wheel end 41 via the first transformer two-white secondary winding 132 and the rectifying diode 14 to the wheel terminal 41. 11 1275235 4 and FIG. 7, therefore, as can be seen from the foregoing, the crying-rainout current 103 of the output terminal 除了, in addition to the switching element 12 during the conduction period, the second current 102 provided by the second dusting=21, plus the switching element When the current is not two, the first current 101 is supplied by the first transformer 13, so the total current 103 (such as ® 7(e)) is in the full cycle (the conduction period plus the non-conduction period) The output of the first current 101 and the second current 102. The waveform of the VDS voltage of the switching element 12 and the waveforms of the currents 1〇5, 1〇1~1〇3 are briefly described as follows: 7(4): the voltage waveform of the switching element 12❸Vds (just ), the Vds voltage waveform of the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Starts to rise to the maximum value with a linear progression = then the switching element 12 does not conduct, the primary current returns to zero, and the other half cycle begins. State: is the output waveform of the first current 101, when the switching element 12 is in the conduction period' The output current is maintained at zero, and the material rises to the maximum at the beginning of the non-conduction period, and then decreases slowly with time. 7(4): The output waveform of the second current is similar to the primary current 郞 waveform, when the switching element 12 During the conduction period, its output starts to rise with time. 'With the difference of the primary (four) Li y) #j and the secondary (Se_dary) side resistance, a multiple relationship of the primary current of 1〇5 can be obtained. 7(e): is the waveform of the total output current 1Q3 without the wave, and the average output current is the sum of the first current 1〇1 and the second current 1〇2. As shown in FIG. 8, a circuit connection mode of the preferred embodiment is 12 1275235. The turn-in + rhyme '321 of the power factor adjustment circuit 32 is electrically connected to the input end of the first transformer 13 to form a conduction. The loop, which is not the same as the original (Fig. 4), is a conduction loop formed by the output terminal 321 of the power factor adjusting circuit 32 being the σσ 甩 carrier; the animal energy component 16 and the second transformer having the input voltage of 21. Referring to FIG. 9, a preferred embodiment of the slap-and-bike 4, β of the present invention has the same components as the first embodiment (FIG. 4), and a different 疋 will be used in the first embodiment. The first conversion circuit 2 and the first Han Tuo 攸 ^ ^ 乐褥换包路 2 are interchanged positions. 1 is a preferred embodiment of the stem of the present invention, which is based on the first embodiment (Fig. 4), and then ^^^ _ mouth, Yandan Liiga An output circuit 17, and the second transformation voltage σ 21 has a set of secondary windings 212, 2 Ί 2 々u 2 213, and each of the secondary windings 212, 213 is connected to a first output terminal 411 and a first output. The first output end 411 of the preferred embodiment is similar to the first tube and the ^ target, and the first current is exchanged between the conduction period and the non-conduction period. The output of the stream 102, differently, the preferred embodiment further has an output that the output terminal 412 can supply a second current 102 during the conduction period. The output circuit 17 of the preferred embodiment has a rectifying element i7i and a wave 172' which functions like the rectifying element 22 and the wave fluctuating element 15, and the first output 13 and the second change of the corresponding connection The crying 21 is connected in series with the rectifying element 171 and the shunting element 172 in parallel. Therefore, in addition to the second current ι 2 being supplied to the first output end 411 during the conducting period, the second output end 4 may be additionally connected during the conducting period. And 412 is supplied with an additional second current 102' to achieve a multi-current output function. Referring to FIG. 5, a fourth preferred embodiment of the present invention is mainly based on the first embodiment (FIG. 4), the add-output circuit 18, and the second transformer 13 1275235 21 has two sets of secondary windings 212, 213, the first transformer 13 has two sets of secondary windings 132, 133, the secondary winding 212 of the second transformer 21 is connected to the secondary winding 132 of the first transformer 13 to a first output terminal 41, and the secondary winding 213 and the second The secondary winding 133 of a transformer 13 is connected to a second output terminal 412~. The first output terminal 41 of the preferred embodiment is similar to the first embodiment, and the first current 101 and the first current are supplied in the conduction period and the non-conduction period. The output of the two currents 102 differs in that the preferred embodiment further has a second output 412'. • The outputs of the first current 101" and a second current 102" can be alternately supplied during the on-time and non-conduction periods. The output circuit 18 of the preferred embodiment has two rectifying elements 181, 182 and a filtering element 183, which functions like the rectifying element 22 and the filtering element 15, but can output a first current 101" and a second current 102". That is, a total output current 103' is additionally outputted to achieve a multi-current output function. In summary, the improved fly-back power supply device 100 of the present invention has a current output during the full cycle (including the conduction period and the non-conduction period). It not only has the features of power saving, high efficiency, high output power, high output current, low ripple, etc. It also has the advantage of reducing cost, especially suitable for large screen LCD TVs and plasma TVs (PDP TV). And the mass production application of the power supply of the liquid crystal display (LCD Monitor). However, the above is only the preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, The simple equivalent changes and modifications made by the present invention in the scope of the invention and the description of the invention are still within the scope of the invention. 14 1275235 Schematic description Fig. 1 is a schematic diagram of a circuit of the existing flyback power supply device of the present invention. The circuit diagram of the components of the flyback power supply device of the flyback power supply device of Fig. 1 has a circuit diagram of each component; 3 is a circuit block diagram illustrating an improved flyback power supply of the present invention; a schematic diagram of a circuit diagram of a modified embodiment of the improved flyback power supply device of the present invention; FIG. It is a schematic diagram of a preferred embodiment of the present invention, which is a preferred embodiment of the present invention. FIG. 6 is a schematic diagram showing the first circuit of the present invention; The circuit of the second embodiment of the present invention has a first-switch-path-output and a waveform of various currents; FIG. 8 is a diagram showing that compared to the first-rounder #e The material of the palladium-based power factor adjustment circuit is electrically connected to the second output terminal and electrically connected to the transport π-transformer of the π-power adjustment circuit to constitute a conduction loop; FIG. 9 is a diagram illustrating the present invention.冲_丨, its == circuit schematic, compared to the first preferred embodiment, The position of the second conversion circuit and the second conversion circuit are interchanged; three comparison == month, the modified fly-back power supply device of the present invention has a mouth-to-mouth map, which is comparable to the first preferred sinus Output a second current to ... the example of the function of delaying the output of the stream, and 15 1275235
圖11是說明本發明的改良型返驰式電源供應裝置的第 四較佳實施例的一電路示意圖，相鉍协笙 祁1乂方；弟一較佳實施例， ，、可另外輸出一總輸出電流以達到 心㈠夕電流輸出的功能。 16 1275235 【主要元件符號說明】 100 · •改良型返驰式電 15、 172、183濾波元件 源供應裝置 16 · • 蓄能元件 101、 10Γ、101”第一電流 2· · • 第二轉換電路 102、 102’、102”第二電流 21 · • 第二變壓器 103、 103’總輸出電流 133 、213次級繞組 105 · • 初級電流 23 · • 歸位單元 1 · · •第一轉換電路 230 • 歸位側 10 · •波寬調整控制器 231 • 二極體 11 · •保護電路 232 • 電容器 12 · •開關元件 31 · • 輸入級電路 13 · •第一變壓器 32 · • 功因調整電路 131、 211初級側 33 · • 回饋電路 132、 212次級側 41 · • 輸出端 14、 171、181、182、22 411 • 第一輸出端 整流元件 412 • 第二輸出端 17Figure 11 is a circuit diagram showing a fourth preferred embodiment of the improved fly-back power supply device of the present invention, which corresponds to a preferred embodiment, and can additionally output a total The output current is used to achieve the function of the heart (one) current output. 16 1275235 [Description of main component symbols] 100 · • Improved flyback power 15, 172, 183 filter component source supply device 16 • • Energy storage component 101, 10Γ, 101” first current 2· · • second conversion circuit 102, 102', 102" second current 21 · • second transformer 103, 103' total output current 133, 213 secondary winding 105 · • primary current 23 · • homing unit 1 · · • first conversion circuit 230 • Home side 10 · Wave width adjustment controller 231 • Diode 11 • Protection circuit 232 • Capacitor 12 • Switching element 31 • Input stage circuit 13 • First transformer 32 • Power factor adjustment circuit 131 211 primary side 33 · • feedback circuit 132, 212 secondary side 41 • • output 14 , 171 , 181 , 182 , 22 411 • first output rectifying element 412 • second output 17