201220658 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種升壓型轉換器，特別是指一種具有 正負輸出端之升壓型轉換器。 【先前技術】 許多應用需要帶有穩壓輸出的正負電壓供應源，例如： 自引擎帶動發電機對12V鉛酸電池充電後產生之車用電源 可以供給車内電子裝置，包括引擎控制系統、音響以及其他 娛樂設備。然而，使用車用電源的電子裝置會面臨輸入電壓 變化過大的考驗，例如：車用電源即將耗盡之際，車用電池 電壓將降低至10V，或當車用電池連接線鬆脫或斷裂時，前 端穩壓電路會輸出高達16V的電壓至後端的電路等。 由於車用電池之電壓會隨引擎轉速而有所變化，就以 12V的正常工作電壓，當應用於半橋驅動架構所設計的音 響放大器時，僅能夠在常用的4歐姆的揚聲器負載上得到 4.5W的輸出功率，這顯然是不足的。因此，有必要將放大 益操作於更高電壓，且為了提供更好的低頻響應輸出，最好 疋使用正負電壓供應，使半橋驅動D類放大器可以省略直 流阻隔電容。 目前對於將單電源轉換為正負輸出的電路已經有許多 先别的研究文獻，如羅方林（Lu〇, RL )發表的論文「雙輸出 升壓技術（Double 〇utpUt Luo-converters-voltage lift technique)」’但是電路架構複雜元件較多。而後亦有提出 杈為簡單的架構，但是負輸出之電容電壓會有電壓不平衡的 201220658 問題。 【發明内容】 因此，本發明之目的，即在提供一種電路易於實現的具 有正負輸出端之升壓型轉換器。 於是，本發明具有正負輸出端之升壓型轉換器包括一開 關讀、一電感、一正電麼輸出電路及—負電壓輸出電路。 该開關元件具有一電連接於電源的第一端及一第二 端；該電感具有-接地之第-端及—與該開關元件之第二端 電連接的第二端。 該正電壓輸出電路電連接該電感的第二端及該正輸出 端之間，具有：一第—電容，具有一電連接該電感的第二端 =第-端及-第二端；__第—導通元件，具有—與該第一電 容的第二端電連接的第一端及一接地之第二端;一第二導通 :件，具有-與該第-導通元件的第—端電連接的第一端及 -電性連接該正輸出端之第二端；及—第二電容，具有一電 接於該第_導通％件之第二端及該正輸出端之間的第一 端及一接地的第二端。 端二電右壓輸出電路電連接該電感的第二端及該負輸出 第一八 第二電容，具有一電連接該電感的第二端之 ㈣端及-第二端；—第三導通元件，具有__與 電性連_:第:端導通7"件的第一端電連接的第-端及- 接於該第四導四電容，具有-電連 及•牛之第一端及该正輸出端之間的第一端 201220658 及一接地的第二端。 藉此，該開關元件導通或不導通時’該正電壓輸出電路 之第一電容及第二電容及該負電壓輸出電路之第三電容及 第四電容皆對該電感供應電流而使該電感激磁而令該正輸 出端及該負輸出端昇壓。 本發明之技術特點即在於’無論該開關元件導通或不導 通時’該正電壓輸出電路及該負電壓輸出電路皆對該電感供 應電流而使該電感激磁而令正負輸出端昇壓，因此可供給需 要穩壓輸出的正負電壓供應源的電子裝置使用。 【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 下配合參考圖式之較佳實施例的詳細說明中，將可清楚的呈 現。 參閱圖1，本發明之較佳實施例中，升壓型轉換器1〇〇 包括一開關元件、一電感z,、一正電壓輸出電路101、一 負電壓輸出電路102、一正輸出端61及一負輸出端62;其 中，開關元件ρ,具有一電連接於電源6〇的第一端u及一第 一端12’電感I,具有一接地之第一端21及一與開關元件g之 第二端12電連接的第二端22;正電壓輸出電路1〇1電連接 電感A的第二端22及正輸出端61之間，該負電壓輸出電路 電連接δ亥電感 '的第二端22及負輸出端62之間。 本發明之技術特點即在於，電感4具有類似於昇壓 (Buck-Boost)的功能，搭配正電壓輸出電路ι〇1及負電壓輸 出電路102具有的電容以達成正負昇壓輸出，無論開關元件 201220658 導通或不導通時，正電壓輸出電路⑻及負電壓輸出電路 102皆對電感Α供應電流而使電感Α激磁而令正輸出端61及 負輸出端62昇壓，因此可供給需要帶有穩麼輸出的正負電 壓供應源的電子裝置使用。 雄將本較佳貫施例的詳細電路介紹如下。 開關元件β的第一端U與第二端12之間反向連接一二 極體’開關元件0,為N型金氧半場效電晶體，第一端" 為源極H Π為沒極，其閘極受控決定導通與否。 正電壓輸出電路1〇1具有一第一電容〇1、—第—導通元 件£>,、一第一導通元件£>2及一第二電容c3。 第一電容c,具有一電連接電感£的第二端22之第一端 311及一第二端312,第一導通元件A具有一與第一電容q的 第二端312電連接的第一端331及一接地之第二端切，第 二導通元件A具有一與第一導通元件A的第一端33ι電連 接的第一端321及一電性連接正輸出端61之第二端 第二電容❻有一電連接於第二導通元件&之第二端奶 及正輸出端61之間的第一端341及_接地的第二端叱； 其中的第-電容ς及第二電容c3即是負責提供正輪 ’ 之昇壓能量。 負電壓輸出電路102具有一第三電容c、_ 电合C2、一第三導通元 件A、一第四導通元件及一第四電容c4。 第三電容q具有一電連接電感々的第二端22 511及一第二端512，第三導通元件化具有—盘=^201220658 VI. Description of the Invention: [Technical Field] The present invention relates to a boost converter, and more particularly to a boost converter having positive and negative outputs. [Prior Art] Many applications require positive and negative voltage supply with regulated output. For example: The vehicle power generated by the engine-driven generator to charge the 12V lead-acid battery can be supplied to the in-vehicle electronic device, including the engine control system, audio, and Other entertainment equipment. However, electronic devices that use automotive power supplies are subject to excessive changes in input voltage. For example, when the vehicle power supply is about to run out, the vehicle battery voltage will be reduced to 10V, or when the vehicle battery cable is loose or broken. The front-end voltage regulator circuit will output a voltage of up to 16V to the circuit at the back end. Since the voltage of the vehicle battery varies with the engine speed, the normal operating voltage of 12V, when applied to the acoustic amplifier designed by the half-bridge drive architecture, can only be obtained on the commonly used 4 ohm speaker load. The output power of W, which is obviously insufficient. Therefore, it is necessary to operate the amplifier at a higher voltage, and in order to provide a better low-frequency response output, it is best to use a positive and negative voltage supply so that the half-bridge driver class D amplifier can omit the DC blocking capacitor. At present, there are many other research literatures on circuits that convert single power to positive and negative outputs, such as the paper "Double 〇utpUt Luo-converters-voltage lift technique" by Luo Fanglin (RL). 'But the circuit architecture is more complex. Then there is a simple architecture, but the negative output capacitor voltage will have a voltage imbalance 201220658 problem. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a boost converter having a positive and negative output that is easy to implement with a circuit. Thus, the boost converter of the present invention having positive and negative outputs includes a switch read, an inductor, a positive output circuit, and a negative voltage output circuit. The switching element has a first end and a second end electrically connected to the power source; the inductor has a first end connected to the ground and a second end electrically connected to the second end of the switching element. The positive voltage output circuit is electrically connected between the second end of the inductor and the positive output end, and has: a first capacitor having a second end electrically connected to the inductor=the first end and the second end; __ a first-conducting element having a first end electrically connected to the second end of the first capacitor and a second end connected to the ground; a second conducting member having - and the first end of the first conducting element a first end of the connection and a second end electrically connected to the positive output end; and a second capacitor having a first electrical connection between the second end of the first conductive member and the positive output end The end and a grounded second end. The second electric right output circuit is electrically connected to the second end of the inductor and the negative output first eight second capacitor, having a (four) end and a second end electrically connected to the second end of the inductor; - a third conducting component , having a first end electrically connected to the first end of the __ and the electrical connection _: the first end is connected to the first end of the member, and is connected to the fourth conductive fourth capacitor, having the first end of the electric connection and the The first end of the positive output is 201220658 and a grounded second end. Thereby, when the switching element is turned on or off, the first capacitor and the second capacitor of the positive voltage output circuit and the third capacitor and the fourth capacitor of the negative voltage output circuit both supply current to the inductor to make the inductor Magnetically boosts the positive output and the negative output. The technical feature of the present invention is that the positive voltage output circuit and the negative voltage output circuit both supply current to the inductor to energize the inductor and boost the positive and negative outputs, regardless of whether the switching element is turned on or off. It can be used by electronic devices that supply positive and negative voltage supply sources that require regulated output. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. Referring to FIG. 1, in a preferred embodiment of the present invention, a boost converter 1A includes a switching component, an inductor z, a positive voltage output circuit 101, a negative voltage output circuit 102, and a positive output terminal 61. And a negative output terminal 62; wherein the switching element ρ has a first end u electrically connected to the power source 6〇 and a first end 12' inductor I having a grounded first end 21 and a switching element g The second end 12 is electrically connected to the second end 22; the positive voltage output circuit 1〇1 is electrically connected between the second end 22 of the inductor A and the positive output end 61, and the negative voltage output circuit is electrically connected to the first step Between the two ends 22 and the negative output 62. The technical feature of the present invention is that the inductor 4 has a function similar to a boost (Boost-Boost), and is matched with the capacitance of the positive voltage output circuit ι〇1 and the negative voltage output circuit 102 to achieve a positive and negative boost output regardless of the switching element. When 201220658 is turned on or off, the positive voltage output circuit (8) and the negative voltage output circuit 102 supply current to the inductor 而 to cause the inductor Α to excite and boost the positive output terminal 61 and the negative output terminal 62, so that the supply can be stabilized. The output of the positive and negative voltage supply source is used by the electronic device. The detailed circuit of this preferred embodiment is described below. The first end U of the switching element β and the second end 12 are reversely connected to a diode 'switching element 0, which is an N-type gold-oxygen half field effect transistor, and the first end is a source H Π is a poleless Its gate is controlled to determine whether it is conductive or not. The positive voltage output circuit 101 has a first capacitor 〇1, a first-conducting element, a first conducting element £>2, and a second capacitor c3. The first capacitor c has a first end 311 and a second end 312 of the second end 22 electrically connected to the inductor. The first conductive element A has a first electrical connection with the second end 312 of the first capacitor q. The terminal 331 and the second end of the grounding, the second conducting component A has a first end 321 electrically connected to the first end 33 of the first conducting component A and a second end electrically connected to the positive output 61 The second capacitor has a first end 341 electrically connected to the second end of the second conducting element & and a second end _ of the grounding; wherein the first capacitor ς and the second capacitor c3 That is, it is responsible for providing the boosting energy of the positive wheel. The negative voltage output circuit 102 has a third capacitor c, a dc C2, a third conducting component A, a fourth conducting component, and a fourth capacitor c4. The third capacitor q has a second end 22 511 electrically connected to the inductor 及 and a second end 512, and the third conductive component has a disk = ^
^、禾二電容C 的第二端512電連接的第一端531及—接地之 山 2 乐一端5 3 2， 201220658 第四導通元件A具有一與第二 連接的第-端521 Μ 3的第一端531電 似第. 電性連接負輸出端62之第二端 ⑺ 4具有—電連接於第四導通元料之第二端 522及負輸出端62之間的第 5化其中的第：電容C及第二1及—接地的第二端 端62之昇壓Μ 2第四電容Q即是負責提供負輪出 以下配合圖2及圖3為各元件的模擬電流、電壓時序波^, the second end 512 of the second capacitor C is electrically connected to the first end 531 and the grounded mountain 2 is at the end 5 3 2, 201220658 The fourth conducting element A has a first end connected to the second end 521 Μ 3 The first end 531 is electrically connected to the second end (7) 4 of the negative output terminal 62 having a fifth connection between the second end 522 and the negative output end 62 of the fourth conductive material. : Capacitor C and the second 1 and the grounded second end 62 of the boost Μ 2, the fourth capacitor Q is responsible for providing the negative wheel out of the following matching. Figure 2 and Figure 3 for each component of the analog current, voltage timing wave
形圖’圖4為開關元件21導通期間為時間w q以下稱第 -模式）之電流流向，及圖5為開關元件⑽導通期間為時 間h至t2(以下稱第二模式）之電流流向，將本較佳實施例的 各元件的動作原理介紹如下。 第一模式·參閱圖4,開關元件導通（時間^至⑺時， 電感Z,激磁使心電流上升，同時’第三導通元件A因順偏而 導通，第三電容Cz被充電至輸入電壓匕；此外，由於第—電 容ς負端被提升至輸入電壓匕以提供昇壓能量，因此第二導 通元件Α被順偏導通’所以正輸出端61之正輸出電壓 L = L3 =「ci +厂*> ’負輸出端62之能量是由第四電容&所提供 昇壓能量’所以負輸出端62之負輸出電壓厂。2 =匕4。FIG. 4 is a current flow direction in which the switching element 21 is turned on for a time wq or lower, and FIG. 5 is a current flow direction in which the switching element (10) is turned on for a time h to t2 (hereinafter referred to as a second mode). The principle of operation of the components of the preferred embodiment is described below. First mode · Referring to Fig. 4, when the switching element is turned on (time ^ to (7), the inductance Z, the excitation causes the core current to rise, and the 'third conduction element A is turned on by the forward bias, and the third capacitance Cz is charged to the input voltage. In addition, since the first capacitor negative terminal is boosted to the input voltage 匕 to provide boosting energy, the second conducting component Α is turned on positively so the positive output voltage of the positive output terminal 61 is L = L3 = "ci + factory *> 'The energy of the negative output 62 is the boost energy supplied by the fourth capacitor & 'so the negative output voltage of the negative output 62 is factory. 2 = 匕 4.
第二模式：參閱圖5，開關元件ρ,不導通（時間t|至 時，電感A激磁使4電流上升，同時，電感A串聯第三電容Q 跨壓對第四電谷匸4充電’此時’正輸出端61之電壓'由第 二電容C3提供昇壓能量’因此正輸出端61之正輸出電壓 K。, =fC3且負輸出端62之電壓f。2 =-(rC2 +l)，又由於電感A 亦對第一電容ci充電以提供昇壓能量’所以電感&之電壓 201220658 V, 。=，，，因此負輸出端62之負輸出電壓匕2 。 假設C,已經充電至l，藉由電感A之伏秒平衡 = (1-£»)χΓα，因此， 公式1 在第一模式時， (volt-second V-=^] voi=vC3 = va+vin=TZ_xVin 公式 及 公式 2 在第二模式時，由於第二電容q之跨壓仍穩住在公式 所表示之電壓，因此，The second mode: Referring to FIG. 5, the switching element ρ is non-conducting (at time t|, the inductance A is excited to cause the current to rise, and at the same time, the inductor A is connected in series with the third capacitor Q to charge the fourth electric valley 4'. When 'the voltage of the positive output terminal' is supplied by the second capacitor C3, the boosting energy 'is therefore the positive output voltage K of the positive output terminal 61, =fC3 and the voltage of the negative output terminal 62. 2 =-(rC2 +l) And because the inductor A also charges the first capacitor ci to provide boosting energy 'so the inductance & voltage 201220658 V, .=,,, therefore the negative output voltage of the negative output 62 匕2. Suppose C, has been charged to l, by the volt-second balance of the inductance A = (1-£») χΓ α, therefore, formula 1 in the first mode, (volt-second V-=^] voi=vC3 = va+vin=TZ_xVin formula and formula 2 In the second mode, since the voltage across the second capacitor q is still stabilized by the voltage indicated by the formula,
V 〇\ ~ r C3V 〇\ ~ r C3
D 公式4 且 公式 v〇2 =-(^, ~vLl)=-(va -(-vC2))=-(vct +vC2) v:_ 由於C2之跨壓於第-模式時已快速充電為輪入電壓 因此公式5可改寫為 κ2 =D Equation 4 and the formula v〇2 =-(^, ~vLl)=-(va -(-vC2))=-(vct +vC2) v:_ Since C2 is fast charged in the first mode, it is quickly charged as The wheeling voltage can therefore be rewritten as κ2 =
\-D\-D
Vin 公式6 及 公式7 本較佳實施例之實驗條件為：⑴直流輸入電壓匕為1〇 至16伏；（li)等比例輸出電壓匕，為+25伏及L為-25伏；（出) 等比例輸出電流人4為1.25安培；（iv)等比例輸出功率為625 201220658 瓦十则頻率為細kHz;(vl)第—電以及第三電容β 電容值為22"F;(vii)第二電容q及第四電容c4之電容值為 別仏㈣）開關元件⑽型號為IRF540NS;及（ix)第 -導通元件A'第二導通it件A、第三導通⑽从第四導 通元件Z)4的型號為MS22。 參閱圖6及圖7，為使用前述元件的電路架構，提供輸 入電壓…0伏時，對應於圖2的不同元件實際測得的電 流、電壓時序波形圖。 參閱圖8、圖9及圖10,圖8是在輸入電壓〇⑺伏 所產生的電壓vgs、vds、Vdl及vd2之波形；圖9是在輸入 電壓匕為12伏所產生的電壓Vgs、Vds、Vdi及〜之波形； 圖10是在輸入電壓4為16伏所產生的電壓Vgs、Vds、〜 及vd2之波形。 參閱圖11、圖12及圖13，分別是輸入電壓〇 1〇伏、 12伏及16伏，且各圖中均顯示開關元件q之閉級驅動訊號 (gate ddving signai)之電壓、、電感電流II】、第一電容c及 第三電容q的電壓Vc，及ν。2時序波形圖。 配合圖2及前述時序波形圖可知，單一正電壓電源可以 在正輸出端及負輸出端62分別得到穩定的昇壓輸出，此 外參閱圖I4’無論是何種負載率（Load percentage)，在輸 入電壓10伏、12伏、14伏及16伏的轉換效率（Efficiency) 皆在91.8%以上。 綜上所述，本發明具有的優點為：只需單一電源的輸入 電壓匕就可以得到昇壓的正輸出電壓匕及負輸出電壓G、可 201220658 應用於D類放大器，以及電路易於實現，故確實能達成本 發明之目的。 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 明專利涵蓋之範圍内》 【圖式簡單說明】 圖1是-電路圖’說明本發明升壓型轉換器之較佳實施 例； 圖2疋一時序波形圖，說明圖丨的一部分元件的模擬電 流、電壓波形； 圖3疋一時序波形圖’說明圖丨的另一部分元件的模擬 電流、電壓波形； 圖4是一電路圖’說明圖！的開關元件導通的電流流向： 圖5是一電路圖，說明圖！的開關元件不導通的電流流 向； 圖6是—時序波形圖，說的一部分元件實際測得❿ 的電流、電壓波形； 圖7是-時序波形圖’說明圖！的另一部分元件實際測 得的電流、電壓波形； 圖8是一時序波形圖，說明在輸入電壓為1〇伏的的電 壓vgs、Vds、vdl及vd2之波形； 圖9是一時序波形圖，說明在輸入電壓為12伏的的電 壓Vgs、Vds、Vdl及Vd2之波形； 10 201220658 圖10是一時序波形圖，說明在輸入電壓為16伏的的電 壓Vgs、Vds、Vdl及Vd2之波形； 圖11是一時序波形圖，說明輸入電壓為10伏的開關元 件之閘級驅動訊號之電壓、電感電流、第一電容及第三電容 之電壓波形； 圖12是一時序波形圖，說明輸入電壓為12伏的開關元 件之閘級驅動訊號之電壓、電感電流、第一電容及第三電容 之電壓波形；Vin Equation 6 and Equation 7 The experimental conditions of the preferred embodiment are: (1) the DC input voltage 匕 is 1 〇 to 16 volts; (li) the proportional output voltage 匕 is +25 volts and L is -25 volts; The proportional output current is 4 1.25 amps; (iv) the proportional output power is 625 201220658 watts, the frequency is fine kHz; (vl) the first and the third capacitance β capacitance is 22 "F; (vii) The capacitance values of the second capacitor q and the fourth capacitor c4 are different (four)) the switching element (10) is model IRF540NS; and (ix) the first-to-conducting element A' is second conducting the component A, and the third conducting (10) is from the fourth conducting component The model number of Z) 4 is MS22. Referring to Figures 6 and 7, the current and voltage timing waveforms actually measured for the different components of Figure 2 are provided for the input circuit voltage ... 0 volts using the circuit architecture of the aforementioned components. Referring to FIG. 8, FIG. 9, and FIG. 10, FIG. 8 is a waveform of voltages vgs, vds, Vdl, and vd2 generated at an input voltage 〇(7) volt; FIG. 9 is a voltage Vgs, Vds generated at an input voltage 匕12 volts. , Vdi and ~ waveforms; Figure 10 is the waveform of the voltages Vgs, Vds, ~ and vd2 generated when the input voltage 4 is 16 volts. Referring to FIG. 11, FIG. 12 and FIG. 13, the input voltages are 〇1 、, 12 volts and 16 volts, respectively, and the voltages of the gate ddving signai of the switching element q are shown in each figure, and the inductor current II 】, the voltage Vc of the first capacitor c and the third capacitor q, and ν. 2 timing waveform diagram. As can be seen from FIG. 2 and the foregoing timing waveform diagram, a single positive voltage power supply can obtain a stable boost output at the positive output terminal and the negative output terminal 62, respectively, and refer to FIG. I4' regardless of the load percentage, at the input. The conversion efficiencies of voltages of 10 volts, 12 volts, 14 volts, and 16 volts are all above 91.8%. In summary, the present invention has the advantages that only a single power supply input voltage 匕 can obtain a boosted positive output voltage 负 and a negative output voltage G, and 201220658 can be applied to a class D amplifier, and the circuit is easy to implement, so It is indeed possible to achieve the object of the invention. The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All of them are still within the scope of the patents of the present invention. [FIG. 1 is a schematic diagram of a preferred embodiment of the boost converter of the present invention; FIG. 2 is a timing waveform diagram illustrating a portion of the diagram The analog current and voltage waveform of the component; Fig. 3 is a timing waveform diagram 'illustrating the analog current and voltage waveform of another part of the figure ;; Fig. 4 is a circuit diagram' explanatory diagram! The current flow of the switching element is turned on: Figure 5 is a circuit diagram, illustrating the figure! The switching element does not conduct current flow; Figure 6 is a timing waveform diagram showing the current and voltage waveforms of a part of the components actually measured; Figure 7 is a timing diagram of the timing waveform diagram! The other part of the actual measured current and voltage waveforms; Figure 8 is a timing waveform diagram illustrating the waveforms of the voltages vgs, Vds, vdl, and vd2 at an input voltage of 1 〇; Figure 9 is a timing waveform diagram. The waveforms of voltages Vgs, Vds, Vdl, and Vd2 at an input voltage of 12 volts are illustrated; 10 201220658 FIG. 10 is a timing waveform diagram illustrating waveforms of voltages Vgs, Vds, Vd1, and Vd2 at an input voltage of 16 volts; 11 is a timing waveform diagram illustrating the voltage waveforms of the voltage, the inductor current, the first capacitor, and the third capacitor of the gate driving signal of the switching element having an input voltage of 10 volts; FIG. 12 is a timing waveform diagram illustrating the input voltage. a voltage waveform of a voltage, an inductor current, a first capacitor, and a third capacitor of a gate driving signal of a 12-volt switching element;
^ ^ ^ IV RfJ mi Λα 件之閘級驅動訊號之電壓、電咸雷泣墙 _ 电4冤峨、第一電容及第三電容 之電壓波形；及 不同負載率在不同輸出電 圖14是一波形圖，說明對應 壓的轉換效率。 201220658 【主要元件符號說明】 100 .......升壓型轉換器 101 .......正電壓輸出電路 102 .......負電壓輸出電路 11 、 21 、 311 、 321 、 331 、 341 ' 511 ' 521 ' 531 ' 541 ............第一端 12、22、312、322、332、 342、512、522、532、542 ............第二端 60 .........電源 61 .........正輸出端 62 .........負輸出端 C,..........第一電容 …·第二電容 Q…·. •…第三電容 Q ••… •…第四電容 D' ….· •…第一導通元件 A ·… 第二導通元件 A ••… •…第三導通元件 d4 …·. •…第四導通元件 〜…. .極體 …·電感 Q, . . . · · •…開關元件 K' ·…· …·正輸出電壓 K2 …·. …·負輸出電壓 12^ ^ ^ IV RfJ mi Λα Piece-level drive signal voltage, electric salty thunder wall _ electric 4 冤峨, first capacitor and third capacitor voltage waveform; and different load rates in different output diagram 14 is a Waveform diagram showing the conversion efficiency of the corresponding pressure. 201220658 [Description of main component symbols] 100.......Boost converter 101.......positive voltage output circuit 102.......negative voltage output circuit 11, 21, 311, 321 , 331 , 341 ' 511 ' 521 ' 531 ' 541 ... first end 12, 22, 312, 322, 332, 342, 512, 522, 532, 542 ... .........the second end 60 .........power 61 .........the positive output 62 .........the negative output C ,..........first capacitance...·second capacitance Q...·.......third capacitance Q ••... •...fourth capacitance D′ ..... •...first conduction element A · ... second conduction element A ••... •...third conduction element d4 ...·.......fourth conduction element~.....polar body...inductor Q, . . . · · •...Switch element K' ·...· ...·positive output voltage K2 ...·. ...·negative output voltage 12