TWI253801B

TWI253801B - DC to DC voltage converter

Info

Publication number: TWI253801B
Application number: TW92131753A
Authority: TW
Inventors: Chun-Chin Tseng; Tsung-Pei Chiang
Original assignee: Au Optronics Corp
Priority date: 2003-11-13
Filing date: 2003-11-13
Publication date: 2006-04-21
Also published as: TW200516831A

Abstract

A DC/DC voltage converter is provided. The DC/DC converter comprises a DC/DC converter chip having at least three voltage input ends and at least three voltage output ends; a first, a second and a third inductance elements; and a first, a second and a third capacitor elements. The first and the second inductance elements are connected to the corresponding two voltage input ends for transmitting an input voltage to the DC/DC converter chip through the first and the second inductance elements. The third inductance element is connected between the DC/DC converter chip and a ground level. The first, the second and the third capacitor elements are respectively between three voltage output ends and the ground level.

Description

1253801 案號 92131753 曰修正五、發明說明（1) 發明所屬之枯術領娀本發明是有關於一種電壓轉換器（DC/DC c ο n v e r t e r )，且更特別是有關於可以適用於液晶顯示器内之驅動電路的直流對直流電壓轉換器。先前技術隨著顯示器的進步，目前市場上已經有越來越多種類的液晶顯示器（liquid crystal display ，LCD)。同時，隨著積體電路之技術發展，LCD的驅動器（driver)不但面積縮小，也更加入許多新的功能。在LCD驅動電路中，有一部分是做為提供電源之用，其包括直流對直流電壓轉換器（DC/DC converter)、穩壓雷々、也分壓電路（bias circuit)。其\路（V〇ltage 是將單一的邏輯工作電壓轉換、接曰，直流對直流電壓轉換器來驅動LCD。穩壓電路則是將轉以一提供足夠高原出。分壓電路則將提供LCD點急、後的南電壓做穩疋的輸 ^ ^ ^ ^ ^ Φ ^ A的電源做數段的電壓分配。直流對直流電壓轉換器可Μ 不位存阳位使石舌一他从乂將輸入的3〜5V電壓，產生兩倍至四倍，甚至更兩倍的雷縣、古φ殷絲祕势々、田、先仏於《键。然而，目前的直流對直流電壓轉換裔之週邊線路所愛热施行在LCD之閘極驅動電路上要^元件太多，而不易具體電壓轉換器還有體積過大的缺點。外，目前的直流對直流第1圖係繪示目前習知的吉1° 地-立同甘4i令夏流對直流電壓轉換器的方 modulates，PM)10、一昇壓 15 (pulse width 汁至電路丨2、一三級電荷幫浦1253801 Case No. 92131753 曰Revision 5, Invention Description (1) The invention belongs to the invention. The present invention relates to a voltage converter (DC/DC c ο nverter), and more particularly to a liquid crystal display. The DC-to-DC voltage converter of the drive circuit. Prior Art With the advancement of displays, there are more and more types of liquid crystal displays (LCDs) on the market. At the same time, with the development of the integrated circuit technology, the LCD driver not only has a smaller area, but also adds many new functions. In the LCD driver circuit, a part is used for supplying power, which includes a DC-DC converter, a regulated Thunder, and a bias circuit. Its path (V〇ltage is a single logic operating voltage conversion, interface, DC to DC voltage converter to drive the LCD. The voltage regulator circuit will be turned to provide enough plateau. The voltage divider circuit will provide The LCD is urgent, and the south voltage is stable. The power supply of ^ ^ ^ ^ ^ Φ ^ A is divided into several parts. The DC-to-DC voltage converter can be used to make the stone tongue The input voltage of 3~5V will be doubled to four times, and even more than twice, the Leixian, the ancient φ Yinsi secret 々, Tian, 仏《 in the "key. However, the current DC to DC voltage conversion The peripheral line loves the heat to be implemented on the gate drive circuit of the LCD. There are too many components, and it is not easy to have a large voltage converter. The current DC-to-DC diagram 1 shows the current well-known ones.吉1°地地立立甘4i makes summer flow to DC voltage converter square modulates, PM)10, a boost 15 (pulse width juice to circuit 丨2, one or three levels of charge pump

7510twf1.ptc 第7510twf1.ptc

1253801 案號 92131753 年月曰修正五、發明說明（2) (charge pump)14與一二級電荷幫浦16。脈衝寬度調變器 10的輸出控制昇壓電路12的動作。昇壓電路12的輸出 V 〇 u t 3 —方面作為直流電壓轉換器的輸出電壓，一方面則輸入至三級電荷幫浦1 4與二級電荷幫浦1 6，並經由電荷幫浦14、16將輸入電壓Vout3提昇至所需的輸出電壓Voutl與 V 〇 u t 2。藉此，可以將例如1 · 6 5 V的輸入電壓轉換成 Voutl= + 15V、Vout2二-12V與Vout3 = 5V三種直流電壓來驅動 LCD。其中上述之電荷幫浦14、16與昇壓電路12之内部的電路圖分別如第2A圖與第2B圖所示。如第2A圖所示，輸入電壓（Vin)，如第1圖中的Vout3，經過電容C1 、二極體 Dl、D2與電容C2所構成的電荷幫浦作用後，將電壓提昇；如第2B圖所示，PWM之輸出訊號控制NM0S電晶體之開關。輸入電壓經過電感L與二極體D、電容C之作用後，將電壓提昇輸出，如第1圖中的Vout3。在上述的電路架構中，通常一組電荷幫浦需要至少兩個電容，而昇壓電路則需要在外部加上電感與電容。因此，此等設計便需要外掛1 1個電容與一個電感。這樣的設計並不能將電壓提昇到很精準的電壓準位來驅動L C D。發明内容因此，本發明係提出一種直流對直流電壓轉換器，使之可以精準地將輸入電壓提昇至所需要的電壓準位，以驅動 L C D 〇本發明係提出一種直流對直流電壓轉換器，其具有減1253801 Case No. 92131753 月 Amendment V. Description of invention (2) (charge pump) 14 and first and second charge pump 16. The output of the pulse width modulator 10 controls the operation of the booster circuit 12. The output V 〇 ut 3 of the booster circuit 12 is used as the output voltage of the DC voltage converter, and is input to the tertiary charge pump 14 and the secondary charge pump 1 6 on the one hand, and via the charge pump 14, 16 boosts the input voltage Vout3 to the desired output voltages Voutl and V 〇ut 2 . Thereby, an input voltage of, for example, 1 . 6 5 V can be converted into three DC voltages of Voutl=+15V, Vout2 two-12V, and Vout3=5V to drive the LCD. The circuit diagrams of the above-described charge pumps 14, 16 and the booster circuit 12 are shown in Figs. 2A and 2B, respectively. As shown in Figure 2A, the input voltage (Vin), as shown in Figure 1 of Vout3, is boosted by the charge pump formed by capacitor C1, diodes D1, D2, and capacitor C2; As shown in the figure, the PWM output signal controls the switching of the NM0S transistor. After the input voltage passes through the inductor L and the diode D and the capacitor C, the voltage is boosted and output, as shown in Fig. 1 of Vout3. In the above circuit architecture, usually a set of charge pumps requires at least two capacitors, and the boost circuit requires an external inductor and capacitor. Therefore, these designs require 11 capacitors and one inductor. Such a design does not drive the voltage to a very accurate voltage level to drive L C D . SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a DC-to-DC voltage converter that can accurately boost an input voltage to a desired voltage level to drive an LCD. The present invention provides a DC-to-DC voltage converter. With minus

7510twf1.ptc 第7頁 1253801 案號 92131753 Λ_η 曰修正五、發明說明（3) 少外掛電容數量的特為達上述目的，器，包括第第性，使本發明與第三與第三昇壓電路，分調變器之輸出端，其端做為直流對直流電電感元件，分別耦接以將一輸入電壓分別以及第一、第二與一之更提出脈衝別耦接至第、第器之中第一容易一種寬度二與關元出，至該一電出端確地同時施，懂，如下第三昇上述之件，其以及輸開關元阻與第。上述第二與藉此，將輸入，因具且可以為讓本下文特壓電第一具有出端件之二電之第第三以外電壓有減使直發明舉較路之、第輸入麵接該輸阻， —— 、昇壓掛少提昇少外流對之上佳實壓轉換至各第輸入至第三電輸出端二與第端耦接至對應出端與以串聯第二與電路係量的電至所需掛電容直流電述目的施例，第一容元與接一曰二幵至對之電該昇方式第三整合感元要的數量壓轉、特並配二與輸出第二、第件，地端壓電應之感元壓電連接脈衝於單件與電壓的特換器徵、合所實施直流調變第二第三 ;第與第二與分別之間路分脈衝件；路之於該寬度一晶電容準位性，的體和優附圖對直 32. · ，與第昇壓—— 、三昇第三搞接〇別更寬度輸出昇壓調變片之元件，以使之積縮點能式，流電壓轉換第第三脈衝寬度電路之輸出第二與第三壓電路，用昇壓電路；至第一、第包括：一開調變器的輸極體’搞接端；以及第電路之該輸器以及第中〇，來達到精驅動LCD。更容易實小〇更明顯易作詳細說明7510twf1.ptc Page 7 1253801 Case No. 92131753 Λ_η 曰 Amendment 5, invention description (3) The number of less external capacitors is specifically for the above purpose, including the first nature, so that the present invention and the third and third boosting The output end of the circuit and the voltage transformer is used as a DC-to-DC electrical inductance component, respectively coupled to couple an input voltage and the first, second and one pulse to the first and the second In the first, it is easy to have a width of two and a closed element, and that the electrical output is correctly applied at the same time. Understand, the third piece of the above-mentioned piece, and the transmission switch element resistance and the first. The second and the above, the input, and the third external voltage having the second electric power of the first piezoelectric element having the output of the first piezoelectric element are reduced, and the first input surface is connected. The resistance, ——, boost hang less, less external flow, upper good pressure conversion, each of the first input to the third electrical output, two and the first end are coupled to the corresponding end, and the second and the circuit are connected in series The purpose of the electricity to the required hang-up capacitor DC description, the first capacity and the next two to the right, the third integrated sensor of the liter mode, the number of compression, special combination and output second, The first piece, the piezoelectric piezoelectric connection pulse of the ground end piezoelectric element is subjected to a single-piece and voltage converter, and the second-order third-order modulation is performed; the first and second and the respective road-divided pulse pieces; The path is the width of the crystal capacitor, and the body and the superior figure are straight 32. ·, and the third booster, the third rise, the third component, the component of the wider output boost modulator. To make it The pinch point energy type, the output voltage of the third pulse width circuit is outputted by the second and third voltage circuits, and the boosting circuit is used; to the first, the first including: the open body of the open modulator And the driver of the first circuit and the middle of the circuit to achieve a fine drive LCD. It's easier to be small 〇 More obvious and easy to explain

7510twf1.ptc 第8頁 12538017510twf1.ptc Page 8 1253801

案號 921317M 曰修正五、發明說明（4) 實施方式請參照第3圖，其繪示依據本發明較佳實施例之直流對直流電壓轉換器的電路示意圖。本發明之直流對直流電壓轉換器，包括直流對直流電壓轉換器晶片3 〇與外掛之第一、第二與第三電感元件L1〜L3，以及第一、第二與第三電容元件C 1〜C 3。直流對直流電壓轉換器晶片3 〇具有至少二個電壓輸入端Vin與三個電壓輸出端v〇utl、Vout2與 Vout3。藉此，將一輸入的直流電壓Viri提昇轉換成三種不同的直流輸出電壓Voutl 、Vout2與Vout3，藉以驅動LCD。因此，如第3圖所示的電路架構，本發明之直流對直流電壓轉換器便僅需要在一晶片外掛三個電容與三個電感即可，大為減低電路的複雜度。直流對直流電壓轉換器晶片3 0内部主要的元件包括脈衝寬度調變器與昇壓電路。脈衝寬度調變器與昇壓電路的數目則與欲產生的輸出電壓數目一致。以第3圖為例，其為將一直流輸入電壓Vin提昇轉換成三個直流輸出電壓 Voutl 、Vout2與V〇ut3，因此直流對直流電壓轉換器晶片 30内部便具有三組脈衝寬度調變器pWM1、PWM2與PMW3，以及分別耦接至其輸出的昇壓電路。直流輸出電壓Voutl、 Vout2與Vout3的數目可以依據實際需求來加以設計，因此並不侷限於三組輸出。故而晶片3 0内的脈衝寬度調變器與昇壓電路的數目也不侷限於三組。脈衝寬度調變器之輸入分別接收輸入電壓（Vfb)與參Case No. 921317M 修正 Amendment V. Description of Invention (4) Embodiments Referring to Figure 3, there is shown a circuit diagram of a DC-to-DC voltage converter in accordance with a preferred embodiment of the present invention. The DC-to-DC voltage converter of the present invention comprises a DC-to-DC voltage converter chip 3 外 and an external first, second and third inductance elements L1 LL3, and first, second and third capacitance elements C 1 ~C 3. The DC-to-DC voltage converter chip 3 has at least two voltage input terminals Vin and three voltage output terminals v〇utl, Vout2 and Vout3. Thereby, an input DC voltage Viri is boosted and converted into three different DC output voltages Voutl, Vout2 and Vout3, thereby driving the LCD. Therefore, as shown in the circuit architecture shown in Fig. 3, the DC-DC voltage converter of the present invention only needs to have three capacitors and three inductors attached to one chip, which greatly reduces the complexity of the circuit. The main components inside the DC-to-DC voltage converter chip 30 include a pulse width modulator and a boost circuit. The number of pulse width modulators and booster circuits is the same as the number of output voltages to be generated. Taking Figure 3 as an example, it converts the DC input voltage Vin into three DC output voltages Voutl, Vout2 and V〇ut3, so that there are three sets of pulse width modulators inside the DC-to-DC voltage converter chip 30. pWM1, PWM2 and PMW3, and boost circuits respectively coupled to their outputs. The number of DC output voltages Voutl, Vout2, and Vout3 can be designed according to actual needs, so it is not limited to three sets of outputs. Therefore, the number of pulse width modulators and booster circuits in the chip 30 is not limited to three groups. The input of the pulse width modulator receives the input voltage (Vfb) and the reference respectively

7510twf1.ptc 第9頁 1253801 案號 92131753 年月 a_修正五、發明說明（5) ^〜考電壓（Vref)，並依此輸出一調變電壓至昇壓電路，择、控制昇壓電路之動作。例如脈衝寬度調變器p w M丨接收^以電壓Vfbl與參考電壓Vrefl ，脈衝寬度調變器pWM2接^ 輸入電壓Vfb2與參考電壓Vref2，脈衝寬度調變器收輸入電壓Vfb3與參考電壓Vref3。以脈衝寬度調變器 PWM1為例’其可以依據參考電壓Vrefl ，將輸入電壓^ V f b 1調變成具有一定寬度的脈衝波形，持續施加於昇壓路。參考電壓Vref3、Vref2與Vrefl，以及脈衝寬度調變器PWM之輸入電壓Vfb3、Vfb2、Vfbl均可以依據實際需求來加以設計，並不侷限說一定均使用相同的值。如第3圖所示’昇壓電路係由開關元件、二極體與電阻4所構成’其中該開關元件例如一電晶體。如圖3所示，第一昇壓電路包括一第一電晶體N1 、一二極體])!、一電阻Rl 1以及一電阻R1 。其中該第一電晶體N1 ，例如一 N Μ 0 S電晶體，具有一閘極1 1 1、一沒極η 2與一源極1 1 3，其中閘極1 1 1耦接至脈衝寬度調變器PWM1之輸出端，及極 112编接至第一電感元件L1，源極113接地。該二極體j)i其陽極耦接至第一電晶體N1之汲極1 12。該電阻R1 1其一端^ 接至一極體D1之陰極與第一電容元件ci。該電阻輕接於電阻R 1 1之另一端與接地端之間。其中電阻R丨係連接於片外部。 '7510twf1.ptc Page 9 1253801 Case No. 92131753 Year a_ Amendment V, invention description (5) ^~ Test voltage (Vref), and accordingly output a modulation voltage to the boost circuit, select and control the boost The action of the road. For example, the pulse width modulator p w M丨 receives the voltage Vfbl and the reference voltage Vref1, the pulse width modulator pWM2 receives the input voltage Vfb2 and the reference voltage Vref2, and the pulse width modulator receives the input voltage Vfb3 and the reference voltage Vref3. Taking the pulse width modulator PWM1 as an example, it can adjust the input voltage ^V f b 1 into a pulse waveform having a certain width according to the reference voltage Vref1, and continuously apply to the boosting path. The reference voltages Vref3, Vref2, and Vref1, and the input voltages Vfb3, Vfb2, and Vfbl of the PWM controller can be designed according to actual needs, and it is not limited to use the same value. As shown in Fig. 3, the boosting circuit is constituted by a switching element, a diode and a resistor 4, wherein the switching element is, for example, a transistor. As shown in FIG. 3, the first boosting circuit includes a first transistor N1, a diode, a resistor, a resistor R1, and a resistor R1. The first transistor N1, for example, an N Μ 0 S transistor, has a gate 1 1 1 , a gate η 2 and a source 1 1 3 , wherein the gate 11 1 is coupled to a pulse width modulation The output terminal of the transformer PWM1, and the pole 112 are coupled to the first inductive component L1, and the source 113 is grounded. The diode j)i has its anode coupled to the drain 1 12 of the first transistor N1. The resistor R1 1 has one end connected to the cathode of the one-pole body D1 and the first capacitive element ci. The resistor is lightly connected between the other end of the resistor R 1 1 and the ground. The resistor R is connected to the outside of the sheet. '

第一昇壓電路包括一第二電晶體N2、一二極體D2、一電阻R22、以及一電阻R21。其中該第二電晶體N2，例如一 N Μ 0 S電晶體，其具有一閘極丨2 1、一汲極丨2 2與一源極The first boosting circuit includes a second transistor N2, a diode D2, a resistor R22, and a resistor R21. The second transistor N2, for example, an N Μ 0 S transistor, has a gate 丨 2 1 , a drain 丨 2 2 and a source

7510twf1.ptc 第10頁，剛案號― 五、發明說明（6) 123，其中閘極121耦接至第二脈衝寬度調變器pwM2之輸出端，汲極122耦接至第二電感元件L2，源極123接地。該二極體D2之陽極耦接至第二電晶體N2之汲極1 22。該電阻R 22 之其一端耦接至二極體D 2之陰極與第二電容元件C2。該電阻R21耦接於電阻R22之另一端與接地端之間。第三昇壓電路包括一第三電晶體P1 、一二極體D3、一電阻R32以及一電阻R3 1 。其中，該第三電晶體pi ，例如一 P Μ 0 S電晶體，其具有一閘極1 3 1、一没極1 3 2與一源極 133，其中該閘極131耦接至第三脈衝寬度調變器PWM3之輸出端，該汲極132耦接至第三電感元件L3。該二極體D3其陰極耦接至第三電晶體Ρ1之汲極丨32。該電阻R32之一端耦接至二極體D1之陽極與第三電容元件C3。該電阻R31耦接於電阻R32之另一端與接地端之間。以脈衝寬度調變器PWM1為例，PWM1的輸出電壓用來控制第一昇壓電路中的第一電晶體N丨，直流輸入電壓V i n則經由第一電感元件L1輸入至第一電晶體Nl的汲極1 1 2。之後，經過二極體D1與電阻Ri i及電阻R1之作用輸出。輸出的電壓在經過外掛於第一輸出端之第一電容元件C1將電壓 k幵至所需要的輸出電壓準位y〇ufl。藉由適當地搭配第一電感元件L1與第一電容元件以之值，便可以將輸入電壓 Vin提昇到驅動LCD所需要的直流電壓準位。至於輸出電壓準位V 〇 u t 2與V 〇 u t 3的運作方式也相類似，在此便不再多做欽述。綜上所述，在依據實際需求，來設計第一、第二及第7510twf1.ptc page 10, just the case number - five, the invention description (6) 123, wherein the gate 121 is coupled to the output end of the second pulse width modulator pwM2, the drain 122 is coupled to the second inductive component L2 The source 123 is grounded. The anode of the diode D2 is coupled to the drain 1 22 of the second transistor N2. One end of the resistor R 22 is coupled to the cathode of the diode D 2 and the second capacitive element C2. The resistor R21 is coupled between the other end of the resistor R22 and the ground. The third boosting circuit includes a third transistor P1, a diode D3, a resistor R32, and a resistor R3 1 . The third transistor pi, for example, a P Μ 0 S transistor, has a gate 1 3 1 , a gate 133 and a source 133, wherein the gate 131 is coupled to the third pulse. The output of the width modulator PWM3 is coupled to the third inductive component L3. The diode D3 has its cathode coupled to the drain 丨 32 of the third transistor Ρ1. One end of the resistor R32 is coupled to the anode of the diode D1 and the third capacitive element C3. The resistor R31 is coupled between the other end of the resistor R32 and the ground. Taking the pulse width modulator PWM1 as an example, the output voltage of the PWM1 is used to control the first transistor N丨 in the first boosting circuit, and the DC input voltage Vin is input to the first transistor via the first inductive component L1. Nl's bungee is 1 1 2 . Thereafter, it is output through the action of the diode D1, the resistor Ri i and the resistor R1. The output voltage is clamped to the required output voltage level y〇ufl by the first capacitive element C1 externally connected to the first output terminal. By appropriately matching the values of the first inductive component L1 and the first capacitive component, the input voltage Vin can be boosted to the DC voltage level required to drive the LCD. As for the output voltage levels V 〇 u t 2 and V 〇 u t 3, the operation mode is similar, and no further explanation will be given here. In summary, the first, second and third are designed according to actual needs.

7510twfl.ptc 第11頁 1253801 案號 92131753 年月曰修正五、發明說明（7) 三電感元件L 1 時，可以將1 · 出電壓Vou11二明之直流對直件與三個電容的功能。此外電壓的情形，掛的電感與電體積小的優點精準的準位，因此，本電感元件與電需要的電壓準本發明的使之更容易實縮小。綜上所述其並非用以限發明之精神和發明之保護範〜L3與第一、第二及第三電容元件C1〜C3之值 6 5 V之直流輸入電壓提昇轉換成三組直流輸 15V、Vout2 二-12V 與 Vout3 = 5V。因此，本發流電壓轉換器只需要在外部加上三個電感元元件便可以達到傳統直流對直流電壓轉換器，本發明也適用於可以輸出複數個直流輸出只要稍微修改晶片内PWM與昇壓電路以及外容即可以達到目的，因此，具有容易實施與。又因為電路不複雜，可以將電壓提昇到很使LCD之驅動更加確實。發明的特徵係可以在一晶片外，外掛少數的容元件，以達到精確地將輸入電壓提昇至縮位，以驅動LCD。另一特徵係具有減少外掛電容數量的特性，施，且可以使直流對直流電壓轉換器的體積，雖然本發明已以較佳實施例揭露如上，然定本發明，任何熟習此技藝者，在不脫離本範圍内，當可作各種之更動與潤飾，因此本圍當視後附之申請專利範圍所界定者為準。7510twfl.ptc Page 11 1253801 Case No. 92131753 月 Amendment V. Invention Description (7) For the three-inductance component L 1 , the DC-to-straight component and the three capacitors of the voltage output Vou11 can be used. In addition, in the case of voltage, the advantages of the hanging inductor and the small electric volume are accurate. Therefore, the voltage required for the inductor element and the electric power is more easily reduced. In summary, it is not intended to limit the spirit of the invention and the protection of the invention. The L3 and the first, second and third capacitive elements C1 to C3 have a DC input voltage of 6 5 V, which is converted into three sets of DC input 15V. , Vout2 2-12V and Vout3 = 5V. Therefore, the present power-to-voltage converter only needs to add three inductor elements to the outside to achieve the conventional DC-to-DC voltage converter. The present invention is also applicable to outputting a plurality of DC outputs as long as the PWM and boost in the chip are slightly modified. The circuit and the external content can achieve the purpose, and therefore, it is easy to implement. And because the circuit is not complicated, the voltage can be raised to make the LCD drive more accurate. The feature of the invention is that a small number of capacitive components can be externally mounted on a chip to accurately boost the input voltage to the indentation to drive the LCD. Another feature is that it has the feature of reducing the number of external capacitors, and can make the volume of the DC-to-DC voltage converter. Although the present invention has been disclosed in the preferred embodiment as above, the present invention is not known to those skilled in the art. Except for the scope of this application, various changes and refinements may be made, and therefore, the scope defined in the patent application scope of this annex shall prevail.

7510twf1.ptc 第12頁 1253801 案號 921317537510twf1.ptc Page 12 1253801 Case No. 92131753

年A 曰修正圖式簡單說明第1圖繪示習知之直流對直流電壓轉換器的電路圖；第2A圖繪示第1圖中之電荷幫浦的電路圖；第2B圖繪示第1圖中之昇壓電路的電路圖；以及第3圖繪示依據本發明較佳實施例之直流對直流電壓轉換器的電路示意圖。標號說明= 1 0 PWM電路1 2昇壓電路 1 1 1 、1 2 1 、1 3 1 閘極 1 1 2、1 2 2、1 3 2 汲極 1 1 3、1 2 3、1 3 3 源極 1 4、1 6電荷幫浦 3 0 直流對直流電壓轉換器晶片BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a circuit diagram of a conventional DC-to-DC voltage converter; Figure 2A is a circuit diagram of the charge pump in Figure 1; Figure 2B is a diagram showing Figure 1 A circuit diagram of a booster circuit; and FIG. 3 is a circuit diagram of a DC-to-DC voltage converter in accordance with a preferred embodiment of the present invention. DESCRIPTION OF REFERENCE NUMERALS = 1 0 PWM circuit 1 2 boost circuit 1 1 1 , 1 2 1 , 1 3 1 gate 1 1 2, 1 2 2, 1 3 2 drain 1 1 3, 1 2 3, 1 3 3 Source 1 4, 16 charge pump 3 0 DC to DC voltage converter chip

7510twf1.ptc 第13頁7510twf1.ptc Page 13

Claims

1253801 案號 92131753 年月修正六、申請專利範圍 1 . 一種直流對直流電壓轉換器，包括：一直流對直流電壓轉換器晶片，具有三個電壓輸入端與三個電壓輸出端；一第一、一第二與一第三電感元件，其中該第一與該第二電感元件分別耦接至該二個電壓輸入端，用以將一輸入電壓分別經由該第一與該第二電感元件輸入至該直流對直流電壓轉換器晶片，該第三電感耦接於該直流對直流電壓轉換器晶片與接地端之間；一第一、一第二與一第三電容元件，每一電容元件分別耦接至電壓輸出端與一接地端之間。 2.如申請專利範圍第1項所述之直流對直流電壓轉換器，其中該直流對直流電壓轉換器晶片更包括：一第一、一第二與一第三脈衝寬度調變器；一第一NM0S電晶體，具有閘極、汲極與源極，其中閘極耦接至該第一脈衝寬度調變器之輸出端，汲極耦接至該第一電感元件，源極接地；一第一二極體，其陽極耦接至該第一 NM0S電晶體之汲極；一第一電阻，其一端耦接至該第一二極體之陰極與該第一電容元件；一第二電阻，耦接於該第一電阻之另一端與接地端之間；一第二NM0S電晶體，具有閘極、汲極與源極，其中閘極耦接至該第二脈衝寬度調變器之輸出端，汲極耦接至該1253801 Case No. 92131753 Revised June, Patent Application No. 1. A DC-to-DC voltage converter, comprising: a DC-to-DC voltage converter chip having three voltage input terminals and three voltage output terminals; a second and a third inductive component, wherein the first and the second inductive component are respectively coupled to the two voltage input terminals for inputting an input voltage to the first and second inductive components respectively The DC-to-DC voltage converter chip is coupled between the DC-to-DC voltage converter chip and the ground; a first, a second, and a third capacitor, each of which is coupled Connected between the voltage output and a ground. 2. The DC-to-DC voltage converter according to claim 1, wherein the DC-to-DC voltage converter chip further comprises: a first, a second and a third pulse width modulator; An NM0S transistor having a gate, a drain and a source, wherein a gate is coupled to an output of the first pulse width modulator, a drain is coupled to the first inductive component, and a source is grounded; a diode having an anode coupled to the drain of the first NMOS transistor; a first resistor having one end coupled to the cathode of the first diode and the first capacitive element; and a second resistor The second NMOS transistor has a gate, a drain and a source, wherein the gate is coupled to the output of the second pulse width modulator , the bungee is coupled to the

7510twf1.ptc 第14頁 1253801 案號 92131753 曰修正六、申請專利範圍第二電感元件，源極接地；一第二二極體，其陽極耦接至該第二NM0S電晶體之汲極；一第三電阻，其一端耦接至該第二二極體之陰極與該第二電容元件；一第四電阻，耦接於該第三電阻之另一端與接地端之間；一 P Μ 0 S電晶體，具有閘極、沒極與源極，其中閘極搞接至該第三脈衝寬度調變器之輸出端，汲極耦接至該第三電感元件，源極耦接至該輸入電壓；一第三二極體，其陰極耦接至該PM0S電晶體之汲極；一第五電阻，其一端耦接至該第三二極體之陽極與該第三電容元件；以及一第六電阻，耦接於該第五電阻之另一端與接地端之間。 3. 如申請專利範圍第2項所述之直流對直流電壓轉換器，其中該第二電阻係連接於該直流對直流電壓轉換器晶片之外部。 4. 一種直流對直流電壓轉換器，包括：一直流對直流電壓轉換器晶片，具有複數個電壓輸入端與複數個電壓輸出端；複數個電感元件，分別耦接至各該些個電壓輸入端，用以將一輸入電壓分別經由各該些電感元件輸入至該直流對直流電壓轉換器晶片；7510twf1.ptc Page 14 1253801 Case No. 92131753 曰 Amendment VI, the second inductive component of the patent application, the source is grounded; a second diode, the anode of which is coupled to the drain of the second NM0S transistor; a third resistor, one end of which is coupled to the cathode of the second diode and the second capacitor; a fourth resistor coupled between the other end of the third resistor and the ground; a P Μ 0 S a crystal having a gate, a gate and a source, wherein the gate is coupled to the output of the third pulse width modulator, the drain is coupled to the third inductive component, and the source is coupled to the input voltage; a third diode having a cathode coupled to the drain of the PMOS transistor; a fifth resistor having one end coupled to the anode of the third diode and the third capacitive element; and a sixth resistor And coupled between the other end of the fifth resistor and the ground. 3. The DC-to-DC voltage converter of claim 2, wherein the second resistor is connected to the outside of the DC-to-DC voltage converter chip. 4. A DC-to-DC voltage converter comprising: a DC-to-DC voltage converter chip having a plurality of voltage input terminals and a plurality of voltage output terminals; a plurality of inductance components coupled to each of the voltage input terminals And an input voltage is respectively input to the DC-DC voltage converter chip via each of the inductance components;

7510twf1.ptc 第15頁 1253801 案號 92131753 _η 曰修正六、申請專利範圍複數個電容元件，接地端之間。 5 .如申請專利範圍器，其中該直流對直流複數個脈衝寬度調複數個昇壓電路，應之各該些脈衝寬度調件與對應之各該些電容 6 .如申請專利範圍器，其中該直流對直流的數目與該些電壓輸出 7. —種直流對直流一第第二與一第一、一第二與一、該第二與該第三脈一、該第二與該第三昇電壓轉換器之輸出；一第一、一第二與第一、該第二與該第三輸入至該第一、該第二第第二與一、該第二與該第三昇 8.如申請專利範圍器，其中該第一、該第分別耦接至各該些電壓輸出端與一第4項所述之直流對直流電壓轉換電壓轉換器晶片更包括：變器；以及其中各該些昇壓電路分別耦接於對變器之输出、對應之各該些電感元元件之間。第4項所述之直流對直流電壓轉換電壓轉換器晶片之該些電壓輸入端端的數目相同。電壓轉換器，包括：一第三脈衝寬度調變器；一第三昇壓電路，分別耦接至該第衝寬度調變器之輸出端，其中該第壓電路之輸出端做為該直流對直流一第三電感元件，分別耦接至各該昇壓電路，用以將一輸入電壓分別與該第三昇壓電路；一第三電容元件，分別耦接至該第壓電路之輸出端與接地端之間。第7項所述之直流對直流電壓轉換二與該第三昇壓電路分別更包括：7510twf1.ptc Page 15 1253801 Case No. 92131753 _η 曰 Correction VI. Patent Application Range A plurality of capacitive components, between ground terminals. 5 . The patent scope device, wherein the DC to DC multiple pulse widths adjust a plurality of boost circuits, and each of the pulse width adjustments and the corresponding capacitors 6 are as claimed in the patent scope, wherein The number of DC to DC and the voltage output 7. The DC to DC, the second and the first, the second and the second, the second and the third pulse, the second and the third An output of the voltage-up converter; a first, a second and a first, a second and a third input to the first, the second second and the second, the second and the third. For example, the first and the second are respectively coupled to the voltage output terminals and the DC-DC voltage conversion voltage converter chip of the fourth item, further comprising: a transformer; The boosting circuits are respectively coupled between the output of the transformer and the corresponding ones of the inductor elements. The number of the voltage input terminals of the DC-to-DC voltage conversion voltage converter chip described in item 4 is the same. The voltage converter includes: a third pulse width modulator; a third boosting circuit coupled to the output end of the first punch width modulator, wherein the output end of the first voltage circuit is a DC-to-DC-to-third inductor component is coupled to each of the booster circuits for respectively coupling an input voltage to the third booster circuit and a third capacitor component to the first piezoelectric component Between the output of the road and the ground. The DC-to-DC voltage conversion according to Item 7 and the third booster circuit respectively include:

7510twf1.ptc 第16頁 1253801 案號 92131753 A_Ά 修正六、申請專利範圍一開關元件，具有一輸入端耦接至對應之該脈衝寬度調變器的輸出，一輸出端耦接至對應之該電感元件；一二極體，耦接至該開關元件之該輸出端與該昇壓電路之輸出端；以及一第一電阻與一第二電阻，以串聯方式連接於該昇壓電路之該輸出端。 9 .如申請專利範圍第7項所述之直流對直流電壓轉換器，其中該第一、該第二與該第三脈衝寬度調變器，以及該第一、該第二與該第三昇壓電路係整合於單一晶片之中〇7510twf1.ptc Page 16 1253801 Case No. 92131753 A_Ά Amendment VI. Patent application: A switching element having an input coupled to the output of the corresponding pulse width modulator, and an output coupled to the corresponding inductive component a diode coupled to the output of the switching element and an output of the boosting circuit; and a first resistor and a second resistor connected in series to the output of the boosting circuit end. 9. The DC-to-DC voltage converter of claim 7, wherein the first, the second and third pulse width modulators, and the first, the second and the third liter The voltage circuit is integrated into a single chip〇

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