CN1363981A - electric power converter with adjustable output voltage - Google Patents

electric power converter with adjustable output voltage Download PDF

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CN1363981A
CN1363981A CN 01101384 CN01101384A CN1363981A CN 1363981 A CN1363981 A CN 1363981A CN 01101384 CN01101384 CN 01101384 CN 01101384 A CN01101384 A CN 01101384A CN 1363981 A CN1363981 A CN 1363981A
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voltage
impedance
output terminal
end
electrically coupled
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CN 01101384
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CN1159831C (en
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林信良
萧克域
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台达电子工业股份有限公司
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Abstract

The invention relates to a converter of electric power being capable of outputting adjustable voltage, including output end of positive and negative voltage, voltage comparator, voltage-adjusted impedance and current source. The voltage comparator has first input end, second input end and comparison output end. Second input end is used to receive the reference voltage. The comparison output end is electrically connected to one of the ends of feedback resistance. First input end is electrically connected to another end of the feedback resistance and one of the ends of load impedance. Another end of the load impedance is electrically connected to one of the ends of current source and voltage-adjusted impedance. Another end of the voltage-adjusted impedance is electrically connected to output end of positive voltage.

Description

可调节输出电压的电力转换器 Adjustable power converter output voltage

本发明涉及一种电力转换器,特别涉及一种可调节输出电压的电力转换器。 The present invention relates to a power converter, and more particularly relates to an adjustable output voltage of the power converter.

随着半导体制造技术的进步,半导体的操作电压(operating voltage)也逐渐降低。 With advances in semiconductor manufacturing technology, a semiconductor operating voltage (operating voltage) is gradually decreased. 在以前,半导体的正常操作电压通常是固定在如12伏特,5伏特或3.3伏特等电压值上。 In the past, the normal operating voltage of the semiconductor is typically fixed, such as 12 volts, the voltage value of 5 volts or 3.3 volts, and the like. 然而,现今的操作电压不但低于3.3伏特,而且更重要的是,这些操作电压已经不再是个固定值了。 Today, however, not only lower than the operating voltage of 3.3 volts, and more importantly, the operating voltage is no longer a fixed value. 举例来说,在具有以芯片组与存储器或其他装置互相沟通的高速中央处理器(CPU)之中,为了求得最高的执行效率,就必须机动式的调整操作电压。 For example, a chipset having to communicate with each other with a high-speed memory devices, or other central processing unit (CPU) in order to obtain maximum efficiency, it is necessary to adjust the operating voltage propelled. 也就是,由电源供应的输出电压必须能够机动式的加以调整。 That is, the output voltage from the power supply must be able to adjust a locomotive.

而在绝大多数电力转换器(power converter)的设计中,都会使用单芯片集成电路(monolithic integrated circuit,monolithic IC)作为脉冲宽度调变(pulsewidth modulation,PWM)集成电路。 In the majority of the power converter (power converter) design, will use a single chip integrated circuit (monolithic integrated circuit, monolithic IC) as a PWM (pulsewidth modulation, PWM) IC. 参照图1,其显示了公知技术所使用的电力转换器10及内部的部分电路图。 Referring to Figure 1, there is shown a circuit diagram of a portion 10 and the interior of the power converter used in the known art. 为了控制脉冲宽度,脉冲宽度调变集成电路100就使用一个电压比较器110,以对电力转换器10所输出的电压+Vo与参考电压Vref进行比较。 In order to control the pulse width, the pulse width modulation integrated circuit 100 on the use of a voltage comparator 110 to the voltage + Vo is compared with the reference voltage Vref output from the power converter 10. 而为了程序化(programming)电力转换器10的输出电压,半导体厂商就在脉冲宽度调变集成电路(PWM IC)100之中建置一个数字/模拟转换器(A/D Converter)120。 In order to programming (Programming) the output voltage of the power converter 10, the semiconductor manufacturers to build a digital / analog converter (A / D Converter) 120 integrated circuit in a pulse width modulation (PWM IC) among 100. 数字/模拟转换器120则根据输入的数字信号(digital signal),如VID0,VID1,VID2到VIDn等,决定由数字/模拟转换器120所输出的参考电压Vref。 Digital / analog converter 120 according to the digital signal (digital signal) input, such as VID0, VID1, VID2 to VIDn the like, the reference voltage Vref determined by the digital / analog converter 120 output. 其中VID0-VIDn被称为电压识别码(voltageidentificantion codes)。 Wherein VID0-VIDn referred VID (voltageidentificantion codes).

藉由调整电压识别码VID0-VIDn的位元,便可以控制输出电压的大小。 By adjusting the bit voltage identification VID0-VIDn, you can control the magnitude of the output voltage. 以5位的电压识别码VID0-VID5为例,例如电压识别码VID0-VID5均为1时,代表输出电压为0V,而电压识别码VID0-VID5均为0代表输出电压为1.85V。 5-bit VID VID0-VID5 Case, e.g. VID VID0-VID5 are 1, representative of the output voltage is 0V, and the voltage identification VID0-VID5 0 are representative of the output voltage of 1.85V. 其间每个位依序改变会造成输出电压有0.025V的变化,藉由调整电压识别码VID0-VID5便可以达到调整输出电压的目的。 During each of the sequentially changed bit will cause the output voltage of 0.025V changes, by adjusting the voltage identification VID0-VID5 can achieve the purpose of adjusting the output voltage. 前述的电压识别码VID0-VID5的位排列组合与输出电压间的关系称为位图谱(bit map)。 The relationship between the bit permutations of the output voltage of the voltage identification VID0-VID5 is called a bit map (bit map).

然而,由于在半导体制造过程中存在许多的变数,因此两个不同的半导体元件所需要的操作电压就可能会不同。 However, since many variables exist in a semiconductor manufacturing process, so that the two different semiconductor elements required operating voltage may be different. 而针对不同的操作电压,在上述电力转换器10的结构中,就必须设计具有不同电压识别码的脉冲宽度调变集成电路。 For different operating voltages and, in the configuration of the power converter 10, it must be designed with a different pulse width modulation voltage identification integrated circuit. 可是每设计一种具有不同电压识别码的脉冲宽度调变集成电路,通常所需要的时间都会超过一年。 PWM design, but each having a different voltage becomes integrated circuit identification code, the time required will typically exceed one year. 如此长久的研发时间,对于变化快速的半导体市场而言,可说是缓不济急。 So long development time for fast changes semiconductor market can be said to be slow.

有鉴于此,本发明提出一种可调节输出电压的电力转换器,这种电力转换器是以提供任一种电压识别码的脉冲宽度调变集成电路做小幅度的调整,使得由利用同一个电压识别码的脉冲宽度调变集成电路所做成的电力转换器,能够轻易的提供各种范围的操作电压。 Accordingly, the present invention provides an adjustable output voltage of the power converter, the power converter is PWM integrated circuit provides a voltage identification code either make minor adjustments, such that by the use of the same VID pulse width modulation integrated circuit made of the power converter, can easily provide the various operating voltage range.

本发明提出一种可调节输出电压的电力转换器,其具有一个正电压输出端与一个负电压输出端。 The present invention provides an adjustable output voltage of the power converter, which has a positive voltage output terminal and a negative voltage output terminal. 此电力转换器包括一个电压比较器,一个电压调整阻抗,以及一个电流源。 This power converter comprises a voltage comparator, a voltage adjustment impedance, and a current source. 其中,电压比较器具有两个输入端以及一个比较输出端。 Wherein, the voltage comparator having two input terminals and a comparator output terminal. 此比较输出端电性耦接至一个回授阻抗的一端。 This comparator output terminal coupled to one end of a feedback impedance. 电压比较器的一个输入端电性耦接至此回授阻抗的另一端以及一个负载阻抗的一端。 A voltage input terminal of the comparator is coupled to the other end of the feedback impedance and the far end of a load impedance. 此负载阻抗的另一端则电性耦接至电流源以及电压调整阻抗的一端。 The other ends of the load impedance is electrically coupled to the end of the current and the voltage source impedance adjustment. 此电压调整阻抗的另一端则电性耦接至正电压输出端。 The other end of the impedance of this voltage regulator is electrically coupled to a positive voltage output terminal. 此外,电压比较器的另一个输入端则接收一个参考电压,以作为电压比较器比较电压时的参考。 In addition, other input terminal of the voltage comparator receives a reference voltage as a reference voltage to the comparison voltage.

其中,上述的参考电压可以是由数字/模拟转换器所输出。 Wherein the reference voltage can be output by the digital / analog converter. 此数字/模拟转换器接收一组电压识别码(voltage identification code),并输出与此电压识别码相对应的参考电压。 This digital / analog converter receives a set of voltage identification (voltage identification code), and outputs the reference voltage and the voltage corresponding to the identification code.

就本发明的另一个方面来看,由电流源以及电压调整阻抗所形成的一组电压调整电路,可以电性耦接于电力转换器的负电压输出端上,藉由调整负电压输出端的电压而达到调整电力转换器的输出电压的目的。 On another point of view according to the present invention, a set of the voltage regulating circuit and the voltage by the current source formed by adjusting the impedance, the negative voltage output terminal may be electrically coupled to the power converter, by adjusting the voltage of the negative voltage output terminal adjusted to achieve an output voltage of the power converter of the object.

就本发明的又一个方面来看,可以以电流源将正电压输出端与负电压输出端电性耦接在一起,并分别在电流源至正电压输出端的电流路径,以及电流源至负电压输出端的电流路径上,各自电性耦接一个电压调整阻抗。 A further aspect of the present invention on the point of view, the current source may be the positive voltage output terminal and the negative voltage output terminal electrically coupled together, and a negative voltage respectively to a positive voltage output terminal of the current path of the current source, and a current source output terminal on the current path, each electrically coupled to a voltage adjustment impedance. 藉此,电流源可以同时调整正、负电压输出端所输出的电压,以较小的电流达到同样大小的电压变化值。 Whereby the current source can be adjusted simultaneously positive and negative voltage output terminal of the output current reaches a small voltage change value of the same size.

本发明另外提出一种可调节输出电压的电力转换器,其具有一个正电压输出端、一个负电压输出端,以及一个脉冲宽度调变集成电路。 The present invention also presents an adjustable output voltage of a power converter having a positive output terminal voltage, a negative voltage output terminal, and a pulse width modulation integrated circuit. 此脉冲宽度调变集成电路是根据一组电压识别码,经过一个负载阻抗而将相对应的调整电压输出到正电压输出端。 This integrated circuit is a pulse width modulation voltage in accordance with a set of identification codes, through a load impedance and the output voltage adjustment corresponding to the positive voltage output terminal. 此电力转换器包括一个电压调整阻抗,以及一个电流源。 This power converter comprises a voltage adjusting impedance, and a current source. 在本发明的一个实施例中,此电压调整阻抗一端电性耦接至负载阻抗,另一端则电性耦接至正电压输出端。 In one embodiment of the present invention, the impedance of the voltage regulator is electrically coupled to an end of load impedance, the other end is electrically coupled to a positive voltage output terminal. 而电流源的一端则电性耦接于电压调整阻抗与负载阻抗之间。 And one end of the current source is electrically coupled between the voltage regulator and load impedance.

在本发明的另一个实施例中,电压调整阻抗则是一端电性耦接至负输出端,另一端电性耦接至负电压输出端。 In another embodiment of the present invention, the impedance of the voltage regulator is electrically coupled at one end to the negative output terminal and the other end is electrically coupled to the negative voltage output terminal. 而电流源的一端则是电性耦接于电压调整阻抗与负输出端之间。 And one end of the current source is electrically coupled between the voltage regulator and the negative output terminal of the impedance.

在本发明的又一个实施例中,则是具有两个电压调整阻抗以及一个电流源。 In still another embodiment of the present invention, the voltage is adjusted with two impedances and a current source. 其中,第一个电压调整阻抗的一端电性耦接至负载阻抗,另一端则电性耦接至正电压输出端。 Wherein the first end of a voltage regulator electrically coupled to the impedance of the load impedance, the other end is electrically coupled to a positive voltage output terminal. 另一个电压调整阻抗则是一端电性耦接至负输出端,另一端电性耦接至负电压输出端。 Another end of the voltage adjusting the impedance is electrically coupled to the negative output terminal and the other end is electrically coupled to the negative voltage output terminal. 而电流源的一端电性耦接于负载阻抗与第一个电压调整阻抗之间,另一端则电性耦接于负输出端与另一个电压调整阻抗之间。 And one end of a current source electrically coupled between a first load impedance and the impedance of the voltage regulator, and the other end is electrically coupled between the negative output terminal of another voltage adjustment impedance.

综上所述,本发明藉由电流源与电压调整阻抗所组成,具有增减电压功能的电路,改变电力转换器所能输出的电压的范围。 In summary, the present invention is by current source and the voltage regulator composed of impedance, voltage reduction circuit having a function of changing the range of the voltage of the power converter can be output. 如此,就无须设计具有不同电压识别码的脉冲宽度调变集成电路。 Thus, it is no need to design the pulse width having different voltage integrated circuit identification code modulation. 如此一来,就可以省去许多的研发时间。 In this way, we can save a lot of development time.

为使本发明的上述和其他目的、特征、和优点能更明显易懂,下文特举较佳实施例,并结合附图,作详细说明如下:附图的简单说明:图1绘示的是公知技术所使用的电力转换器与内部的部分电路方块图;图2绘示的是根据本发明的第一较佳实施例的电力转换器与内部的部分电路方块图;图3绘示的是根据本发明的第二较佳实施例的电力转换器与内部的部分电路方块图;以及图4绘示的是根据本发明的第三较佳实施例的电力转换器与内部的部分电路方块图。 To make the above and other objects, features, and advantages can be more fully understood by reading the following preferred embodiments and the accompanying drawings, described in detail below: BRIEF DESCRIPTION OF DRAWINGS: FIG. 1 shows the and the inner part of the converter circuit block diagram of the power used in the known art; FIG. 2 is a partial schematic diagram of the internal circuit of the power converter is a block diagram of a first preferred embodiment of the present invention; FIG. 3 shows the partial block diagram of a power converter circuit of a second preferred embodiment of the present invention, with the interior; and Figure 4 shows is a block diagram of a partial circuit of the power converter of the third preferred embodiment of the present invention and the interior of the .

本发明的概念是在不变更位图谱的状况下,利用电流源与电压调节阻抗来调整输出电压的上下限。 Concept of the present invention is in the situation without changing the bit map, using the current upper and lower source impedance of the voltage regulator adjusts the output voltage. 如此,便可以使用既有的位图谱达到变更电压的目的,而不必重新设计电压识别码。 So, you can use existing bit patterns to achieve the purpose of changing voltage, without having to redesign voltage identification.

参照图2,其绘示的是根据本发明的第一较佳实施例的电力转换器与内部的部分电路方块图。 Referring to FIG. 2, which shows a partial circuit of the power converter is the internal block diagram of a first preferred embodiment of the present invention. 在电力转换器(power converter)20之中,包括有一个脉冲宽度调变集成电路(pulse width modulation integrated circuits,之后简称为PWMIC)200,回授阻抗212,负载阻抗214,电流源230以及电压调整阻抗240。 In the power converter (power converter) into 20, comprising an integrated circuit a PWM (pulse width modulation integrated circuits, hereinafter simply referred to as PWMIC) 200, the feedback impedance 212, the load impedance 214, current source 230 and voltage regulator impedance 240. 其中,PWMIC 200是根据所输入的电压识别码(voltage identificationcode)VID0-VIDn以通过负载阻抗214与电压调整阻抗240,将一个调整电压输出到电力转换器20的正电压输出端+Vo之上。 Wherein, PWMIC 200 through a load impedance 214 and impedance 240 to adjust the voltage, a regulated voltage output to the power converter on the output of the positive voltage + Vo 20 in accordance with the input voltage identification (voltage identificationcode) VID0-VIDn.

而在PWMIC 200之中,则包括了一个电压比较器210,以及一个数字/模拟转换器(D/A Converter)220。 And in PWMIC 200, it includes a voltage comparator 210, and a digital / analog converter (D / A Converter) 220. 其中,数字/模拟转换器220是用以接收前述的电压识别码VID0-VIDn,并由参考电压端222输出对应于此电压识别码的一个参考电压Vref。 Wherein the digital / analog converter 220 is used for voltage identification VID0-VIDn aforementioned received by the reference voltage output terminal 222 corresponding to this reference voltage Vref is a voltage identification code. 此参考电压Vref就输入到电压比较器210的输入端217,以作为电压比较器210进行电压比较时的一个基准。 This reference voltage Vref is input to the input terminal 217 to the voltage comparator 210 to the voltage comparator 210 as a comparison voltage reference timing. 此外,由电压比较器210的比较输出端219所输出的电压,会在经过回授阻抗212之后,回授到电压比较器210的另一个输入端215上,以做为与参考电压Vref比较时所用的电压。 Further, the output of the voltage comparator 219, voltage comparator 210 output will be after a feedback impedance 212, feedback 215 to the other input terminal of the voltage comparator 210, as compared to the reference voltage Vref voltage used.

由电压比较器210的比较输出端219所输出的电压在经过回授阻抗212之后,会再由负载阻抗214,以及电流源230与电压调整阻抗240进行调整。 Comparing the voltage output of the voltage comparator 210 output 219 after passing through the feedback impedance 212, then the load impedance will be 214, and a current source 230 and voltage regulator 240 adjusts the impedance. 这个调整过后的电压,也就是上述的调整电压,就会被输出到电力转换器20的正电压输出端+Vo之上,以调整正电压输出端+Vo上的电压值。 After adjustment of the voltage, which is above the regulated voltage will be outputted to power on the positive voltage output terminal 20 is + Vo of the converter, the positive voltage output terminal to adjust the value of the voltage + Vo.

由于在稳定状态的时候,电压比较器的两个输入端所输入的电压应该是相同的,因此在上述的第一个实施例中,正电压输出端+Vo所输出的电压应该是:Vo=Vref+I*R其中,I是电流源所提供的电流,而R则是电压调整阻抗的电阻值。 Since in the steady state when the input voltage of the two input terminals of the voltage comparator should be the same, so the above-described embodiment in the first embodiment, the positive voltage output terminal of the output voltage Vo + should be: Vo = Vref + I * R where, I is the current provided current source, and R is the resistance value of the impedance of the voltage regulator. 因此可知,藉由调整电流I的大小、方向,或是调整电阻R的电阻值,就可以达到调整电力转换器的输出电压的目的。 Thus understood, by adjusting the magnitude of the current I, the direction or adjust the resistance value of the resistor R, can achieve the purpose of adjusting the power converter output voltage.

接下来参照图3,其显示了根据本发明的第二较佳实施例的电力转换器与内部的部分电路方块图。 Referring next to Figure 3, which shows a partial circuit of the power converter and the internal block diagram of a second preferred embodiment of the present invention. 在电力转换器30之中,包括有一个PWMIC 300,回授阻抗312,负载阻抗314,电流源330以及电压调整阻抗340。 Among the power converter 30, including a PWMIC 300, the feedback impedance 312, the load impedance 314, a current source 330 and voltage regulator 340 impedance. 其中,PWMIC 300是根据所输入的电压识别码VID0-VIDn,通过负载阻抗314将相对应的一个调整电压输出到电力转换器30的正电压输出端+Vo之上。 Wherein, PWMIC 300 based on the identification code VID0-VIDn voltage input through a load impedance 314 corresponding to a regulated voltage output to the power converter on the positive voltage output terminal of + Vo 30.

而在PWMIC 300之中,则包括了一个电压比较器310,以及一个数字/模拟转换器320。 And in PWMIC 300, it includes a voltage comparator 310, and a digital / analog converter 320. 其中,数字/模拟转换器320是用以接收前述的电压识别码VID0-VIDn,并由参考电压端322输出对应于此电压识别码的一个参考电压Vref。 Wherein the digital / analog converter 320 is used for receiving the identification code voltage VID0-VIDn, by the reference voltage terminal 322 outputs a reference voltage Vref corresponding to this voltage identification code. 此参考电压Vref就输入到电压比较器310的输入端317,以作为电压比较器310进行电压比较时的一个基准。 This reference voltage Vref is input to the voltage comparator input 310 to the terminal 317, the voltage comparator 310 as a reference time for comparison voltage. 此外,由电压比较器310的比较输出端319所输出的电压,会在经过回授阻抗312之后,回授到电压比较器310的另一个输入端315上,以做为与参考电压Vref比较时所用的电压。 Further, the output of the voltage comparator 319 of the voltage comparator 310 output will be after a feedback impedance 312, feedback 315 to the other input terminal of the voltage comparator 310, as when compared to the reference voltage Vref voltage used.

此外,在数字/模拟转换器320还有一个负输出端325。 Further, in the digital / analog converter 320 and a negative output terminal 325. 负输出端325是经过电压调整阻抗340而电性耦接至电力转换器30的负电压输出端-Vo上。 The negative output terminal 325 is to adjust the impedance of the voltage across 340 is electrically coupled to the negative voltage output terminal 30 is -Vo power converter. 如此,负电压输出端-Vo上的电压,就可以藉由电压源330以及电压调整阻抗340而加以调整。 Thus, the negative voltage on the output terminal of the voltage -Vo, impedance can be adjusted by the voltage source 340 and voltage regulator 330.

在上述的第二个实施例中,负电压输出端-Vo藉由电流源330与电压调整阻抗340所能调整的电压值应该是:Vo=I*R其中,I是电流源330所提供的电流,而R则是电压调整阻抗340的电阻值。 In the second embodiment, the negative voltage output terminal of the voltage -Vo by adjusting the impedance 340 can adjust the voltage value of the current source 330 should be: Vo = I * R where, I is the current source 330 is provided current, and R is the resistance value of the impedance of the voltage regulator 340. 因此可知,藉由调整电流I的大小、方向,或是调整电阻R的电阻值,就可以达到调整电力转换器的输出电压的目的。 Thus understood, by adjusting the magnitude of the current I, the direction or adjust the resistance value of the resistor R, can achieve the purpose of adjusting the power converter output voltage.

接下来参照图4,其显示了根据本发明的第三较佳实施例的电力转换器与内部的部分电路方块图。 Referring next to Figure 4, which shows a partial circuit of the power converter and the internal block diagram of a third preferred embodiment of the present invention. 在电力转换器40之中,包括一个PWMIC 400,回授阻抗412,负载阻抗414,电流源430以及两个电压调整阻抗440与450。 Among the power converter 40, including a PWMIC 400, the feedback impedance 412, the load impedance 414, 430 and two current sources 440 and 450 adjust the impedance voltage. 其中,PWMIC 400是根据所输入的电压识别码VID0-VIDn,通过负载阻抗414与电压调整阻抗440,将相对应的调整电压输出到电力转换器40的正电压输出端+Vo之上。 Wherein, PWMIC 400 based on the identification code VID0-VIDn voltage input through the load impedance 440 and 414 adjust the impedance voltage, the output voltage adjustment corresponding to the power converter on the positive voltage output terminal of + Vo 40.

而在PWMIC 400之中,则包括了一个电压比较器410,以及一个数字/模拟转换器420。 And in PWMIC 400, it includes a voltage comparator 410, and a digital / analog converter 420. 其中,数字/模拟转换器420是用以接收前述的电压识别码VID0-VIDn,并由参考电压端422输出对应于此电压识别码的一个参考电压Vref。 Wherein the digital / analog converter 420 is used for voltage identification VID0-VIDn aforementioned received by the reference voltage output terminal 422 corresponding to this reference voltage Vref is a voltage identification code. 此参考电压Vref输入到电压比较器410的输入端417,以作为电压比较器410进行电压比较时的一个基准。 This reference voltage Vref is input to the input terminal 417 of the voltage comparator 410 to the voltage comparator 410 as a comparison voltage reference timing. 此外,由电压比较器410的比较输出端419所输出的电压,会在经过回授阻抗412之后,回授到电压比较器410的另一个输入端415上,以做为与参考电压Vref比较时所用的电压。 Further, the comparator 410 compares the output voltage of the voltage output from the comparator 419 with the reference voltage Vref terminal, will after a feedback impedance 412, the feedback voltage to the other input terminal of the comparator 410 415 to serve as voltage used.

此外,在数字/模拟转换器420上还有一个负输出端425。 Further, in the digital / analog converter 420 and a negative output terminal 425. 负输出端425是经过电压调整阻抗450而电性耦接至电力转换器40的负电压输出端-Vo上。 The negative output terminal 425 and the negative voltage is -Vo output terminal electrically coupled to the power converter 40 through the impedance of the voltage regulator 450. 如此,负电压输出端-Vo上的电压,就可以藉由电流源430以及电压调整阻抗450而加以调整。 Thus, the negative voltage on the output terminal of the voltage -Vo, by current source 430 can adjust the impedance 450 and a voltage to be adjusted.

在上述的实施例中,由于两个电压调整阻抗是使用同一个电流源,因此对电力转换器的输出电压(+Vo-(-Vo))所造成的影响就会是:(+Vo-(-Vo))=I*(R1+R2)其中,R1,R2分别是两个电压调整阻抗的电阻值。 In the above embodiment, since the two voltage adjustment impedance is a current source using the same, and therefore the output voltage of the power converter (+ Vo - (- Vo)) caused by the impact would be: (+ Vo- ( -Vo)) = I * (R1 + R2) where, R1, R2 are the resistance values ​​of the two voltage adjustment impedance.

综上所述,现将本发明的优点略述如下。 In summary, the advantages of the invention will now be outlined as follows. 本发明藉由具有增减电压功能的电路,改变电力转换器所能输出的电压的范围。 The present invention is increased or decreased by a circuit having a function of voltage, to change the range of the voltage of the power converter can be output. 如此,就可以省去许多研发不同PWMIC的时间。 So, we can save a lot of time developing different PWMIC.

虽然本发明已以较佳实施例揭露如上,然其并非用以限定本发明,任何本领域的技术人员,在不脱离本发明的精神和范围内,当可作各种更动与润饰,因此本发明的保护范围应当以权利要求范围所界定的为准。 Although the present invention has been disclosed above by the preferred embodiments, they are not intended to limit the present invention, anyone skilled in the art, without departing from the spirit and scope of the present disclosure, may make various modifications and variations, so the scope of the invention should be defined by the scope of the claims and their equivalents.

Claims (15)

1.一种可调节输出电压的电力转换器,具有一正电压输出端与一负电压输出端,包括:一电压比较器,该电压比较器具有一第一输入端,一第二输入端,与一比较输出端;一电压调整阻抗;以及一电流源;其中,该比较输出端电性耦接至一回授阻抗的一端,该第一输入端则电性耦接至该回授阻抗的另一端与一负载阻抗的一端,该负载阻抗的另一端则电性耦接至该电流源与该电压调整阻抗的一端,该电压调整阻抗的另一端电性耦接至该正电压输出端,该第二输入端则接收一参考电压。 1. An adjustable power converter output voltage, the output terminal having a positive voltage and a negative voltage output terminal, comprising: a voltage comparator, the voltage comparator having a first input terminal, a second input terminal, and a comparison output terminal; impedance adjusting a voltage; and a current source; wherein the comparator output terminal coupled to one end of a feedback impedance, the first input terminal is electrically coupled to the other of the feedback impedance one end of an end of a load impedance, the other terminal of the load impedance is electrically coupled to one end of the current source and the voltage adjustment impedance, the other terminal of the voltage adjusting an impedance coupled to the positive voltage output terminal, a second input terminal receiving the reference voltage.
2.如权利要求1所述的电力转换器,其中该参考电压是由一数字/模拟转换器所输出,该数字/模拟转换器接收一电压识别码,并输出与该电压识别码相对应的该参考电压。 2. The power converter according to claim 1, wherein the reference voltage output by a digital / analog converter, the digital / analog converter receives a voltage identification code, and outputs a voltage corresponding to the identification code the reference voltage.
3.如权利要求1所述的电力转换器,其中该电压调整阻抗为一电阻。 The power converter according to claim 1, wherein the impedance is a resistor voltage regulation.
4.一种可调节输出电压的电力转换器,具有一正电压输出端与一负电压输出端,包括:一电压比较器,该电压比较器具有一第一输入端,一第二输入端,与一比较输出端;一数字/模拟转换器,具有一参考电压输出端与一负输出端,该数字/模拟转换器接收一电压识别码,并在该参考电压输出端输出与该电压识别码相对应的一参考电压;一电压调整阻抗;以及一电流源;其中,该比较输出端电性耦接至一回授阻抗的一端,该第一输入端则电性耦接至该回授阻抗的另一端与一负载阻抗的一端,该负载阻抗的另一端电性耦接至该正电压输出端,该第二输入端则接收该参考电压;其中,该负输出端电性耦接至该电流源与该电源调整阻抗的一端,该电压调整阻抗的另一端则电性耦接至该负电压输出端。 4. An adjustable power converter output voltage, the output terminal having a positive voltage and a negative voltage output terminal, comprising: a voltage comparator, the voltage comparator having a first input terminal, a second input terminal, and a comparison output terminal; a digital / analog converter having a reference voltage output terminal and a negative output terminal of the digital / analog converter receives a voltage identification code, and the reference voltage output terminal to the voltage identification code phase It corresponds to a reference voltage; a voltage adjustment impedance; and a current source; wherein the comparator output terminal coupled to one end of a feedback impedance, the first input terminal is electrically coupled to the feedback impedance the other end of a load impedance of one end, the other end of the load impedance is electrically coupled to the positive voltage output terminal, the second input terminal is receiving the reference voltage; wherein the negative output terminal electrically coupled to the current One end of the power source impedance adjustment, the other end of the impedance of the voltage regulator is electrically coupled to the negative voltage output terminal.
5.如权利要求4所述的电力转换器,其中该电压调整阻抗为一电阻。 5. The power converter according to claim 4, wherein the impedance is a resistor voltage regulation.
6.一种可调节输出电压的电力转换器,具有一正电压输出端与一负电压输出端,包括:一电压比较器,该电压比较器具有一第一输入端,一第二输入端,与一比较输出端;一数字/模拟转换器,具有一参考电压输出端与一负输出端,该数字/模拟转换器接收一电压识别码,并于该参考电压输出端输出与该电压识别码相对应的一参考电压;一第一电压调整阻抗;一第二电压调整阻抗;以及一电流源,具有一第一端与一第二端;其中,该比较输出端电性耦接至一回授阻抗的一端,该第一输入端则电性耦接至该回授阻抗的另一端与一负载阻抗的一端,该负载阻抗的另一端电性耦接至该电流源与该第一电压调整阻抗的该第一端,且该第一电压调整阻抗的另一端则电性耦接至该正电压输出端,该第二输入端则接收一参考电压;其中,该负输出端电性耦接至该电流 An adjustable power converter output voltage, the output terminal having a positive voltage and a negative voltage output terminal, comprising: a voltage comparator, the voltage comparator having a first input terminal, a second input terminal, and a comparison output terminal; a digital / analog converter having a reference voltage output terminal and a negative output terminal of the digital / analog converter receives a voltage identification code, and to the reference voltage output terminal with respect to the voltage identification code corresponds to a reference voltage; a first impedance adjustment voltage; a second voltage adjusting impedance; and a current source, having a first end and a second end; wherein the comparator output terminal is electrically coupled to a feedback one end of the impedance, the first input terminal is electrically coupled to the other end of the feedback impedance of one end of a load impedance, the other terminal of the load impedance coupled to the current source and the impedance of the first voltage adjustment the first end, and the other end of the first voltage adjustment impedance is electrically coupled to the positive voltage output terminal, the input terminal is receiving a second reference voltage; wherein the negative output terminal electrically coupled to the the current 源的该第二端与该第二电压调整阻抗的一端,该第二电压调整阻抗的另一端则电性耦接至该负电压输出端。 Source with one end of the second end of the second voltage adjustment impedance, the impedance of the other end of the second voltage regulator is electrically coupled to the negative voltage output terminal.
7.如权利要求6所述的电力转换器,其中该第一电压调整阻抗为一电阻。 7. The power converter according to claim 6, wherein the first voltage adjustment impedance is a resistor.
8.如权利要求6所述的电力转换器,其中该第二电压调整阻抗为一电阻。 The power converter as claimed in claim 6, wherein the second impedance is a resistance voltage adjustment.
9.一种可调节输出电压的电力转换器,具有一正电压输出端、一负电压输出端,以及一脉冲宽度调变集成电路,该脉冲宽度调变集成电路是根据一电压识别码,经过一负载阻抗以输出相对应的一调整电压至该正电压输出端,该电力转换器包括:一电压调整阻抗,一端电性耦接至该负载阻抗,另一端则电性耦接至该正电压输出端;以及一电流源,该电流源一端电性耦接于该电压调整阻抗与该负载阻抗之间。 An adjustable power converter output voltage, the output terminal having a positive voltage, a negative voltage output terminal, and a pulse width modulation integrated circuit, the integrated circuit is a pulse width modulation voltage in accordance with an identification code, after a load impedance to the output corresponding to an adjusting voltage to the positive voltage output terminal, the power converter comprising: a voltage adjusting impedance, electrically one end coupled to the load impedance, the other end is electrically coupled to the positive voltage an output terminal; and a current source, one end of the current source electrically coupled between the load impedance and the impedance of the voltage regulator.
10.如权利要求9所述的电力转换器,其中该电压调整阻抗为一电阻。 10. The power converter according to claim 9, wherein the impedance is a resistor voltage regulation.
11.一种可调节输出电压的电力转换器,具有一正电压输出端、一负电压输出端,以及一脉冲宽度调变集成电路,该脉冲宽度调变集成电路具有一负输出端,且该脉冲宽度调变集成电路是根据一电压识别码,经过一负载阻抗以输出相对应的一调整电压至该正电压输出端,该电力转换器包括:一电压调整阻抗,一端电性耦接至该负输出端,另一端则电性耦接至该正电压输出端;以及一电流源,该电流源的一端电性耦接于该电压调整阻抗与该负输出端之间。 11. An adjustable output voltage of the power converter, the output terminal having a positive voltage, a negative voltage output terminal, and a pulse width modulation integrated circuit, the PWM circuit having a negative output terminal, and the the integrated circuit is a pulse width modulation voltage in accordance with an identification code, via a load impedance to an output voltage adjustment corresponding to the positive voltage output terminal, the power converter comprising: a voltage adjusting impedance, electrically coupled to the end the negative output terminal, the other end is electrically coupled to the positive voltage output terminal; and a current source, one end of the current source electrically coupled between the voltage regulator and the impedance of the negative output terminal.
12.如权利要求11所述的电力转换器,其中该电压调整阻抗为一电阻。 12. The power converter according to claim 11, wherein the impedance is a resistor voltage regulation.
13.一种可调节输出电压的电力转换器,具有一正电压输出端、一负电压输出端,以及一脉冲宽度调变集成电路,该脉冲宽度调变集成电路具有一负输出端,且该脉冲宽度调变集成电路是根据一电压识别码,经过一负载阻抗以输出相对应的一调整电压至该正电压输出端,该电力转换器包括:一第一电压调整阻抗,一端电性耦接至该负载阻抗,另一端则电性耦接至该正电压输出端;一第二电压调整阻抗,一端电性耦接至该负输出端,另一端则电性耦接至该负电压输出端;以及一电流源,一端电性耦接于该负载阻抗与该第一电压调整阻抗之间,另一端则电性耦接于该负输出端与该第二电压调整阻抗之间。 13. An adjustable output voltage of the power converter, the output terminal having a positive voltage, a negative voltage output terminal, and a pulse width modulation integrated circuit, the PWM circuit having a negative output terminal, and the the integrated circuit is a pulse width modulation voltage in accordance with an identification code, via a load impedance to an output voltage adjustment corresponding to the positive voltage output terminal, the power converter comprising: a first voltage adjustment impedance electrically coupled to one end to the load impedance, the other end is electrically coupled to the positive voltage output terminal; a second adjustment impedance voltage, one end electrically coupled to the negative output end and the other end is electrically coupled to the negative voltage output terminal ; and a current source electrically coupled between one end of the load impedance and the first impedance adjustment voltage, and the other end is electrically coupled between the negative output terminal of the second voltage adjustment impedance.
14.如权利要求13所述的电力转换器,其中该第一电压调整阻抗为一电阻。 14. The power converter according to claim 13, wherein the first voltage adjustment impedance is a resistor.
15.如权利要求13所述的电力转换器,其中该第二电压调整阻抗为一电阻。 15. The power converter according to claim 13, wherein the second impedance is a resistance voltage adjustment.
CNB011013842A 2001-01-05 2001-01-05 Electric Power converter with adjustable output voltage CN1159831C (en)

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CN100511078C (en) 2007-06-25 2009-07-08 中兴通讯股份有限公司 Load level switching circuit
US9484824B2 (en) 2005-08-26 2016-11-01 Power Integrations, Inc. Method and apparatus for digital control of a switching regulator

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US9582054B2 (en) * 2013-06-17 2017-02-28 System General Corp. Method and apparatus for selecting the output of programmable power adapter

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Publication number Priority date Publication date Assignee Title
US9484824B2 (en) 2005-08-26 2016-11-01 Power Integrations, Inc. Method and apparatus for digital control of a switching regulator
CN103762847B (en) * 2005-08-26 2017-12-15 电力集成公司 A method for a digital switching regulator and control means
US10224820B2 (en) 2005-08-26 2019-03-05 Power Integrations, Inc. Method and apparatus for digital control of a switching regulator
CN100511078C (en) 2007-06-25 2009-07-08 中兴通讯股份有限公司 Load level switching circuit

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