CN115390612A - A DC-DC converter remote voltage regulation circuit - Google Patents

Abstract

The invention provides a far-end voltage regulating circuit of a DC-DC converter, which is characterized in that a potentiometer is arranged at an output load end of the DC-DC converter, an intermediate pin of the potentiometer is utilized to sample output voltage, and the sampled voltage is output to a voltage regulating end of the DC-DC converter after being subjected to proportional scaling and addition operation, so that the voltage regulating end voltage of the DC-DC converter is changed, and the output voltage of the DC-DC converter is regulated. The output voltage width adjustment is realized by setting a certain scaling ratio, and the upper limit of the adjustment voltage range is ensured by setting a reasonable voltage reference, so that the adjustment of any range in the adjustable range of the DC/DC converter is realized. The invention realizes the adjustment of the output voltage range by adjusting the potentiometer, can accurately calculate the adjustment range and is convenient to use.

Description

Translated fromChinese

一种DC-DC转换器远端调压电路A DC-DC converter remote voltage regulation circuit

技术领域technical field

本发明属于电压调节领域，尤其涉及一种DC-DC转换器远端调压电路。The invention belongs to the field of voltage regulation, in particular to a remote voltage regulation circuit of a DC-DC converter.

背景技术Background technique

在电源设计中，很多情况下需要输出电压可调整，大部分调压电位计直接安装在电源上调节；也有在电源上预留电位计的3个端子，将电位计装到系统上调节；也有将电位计两端接到系统负载端，通过中间引脚调节电源输出电压。In the power supply design, in many cases, the output voltage needs to be adjustable, and most of the voltage regulating potentiometers are directly installed on the power supply for adjustment; there are also three terminals of the potentiometer reserved on the power supply, and the potentiometer is installed on the system for adjustment; there are also Connect both ends of the potentiometer to the load end of the system, and adjust the output voltage of the power supply through the middle pin.

目前DC/DC转换器输出电压调节大都利用电阻、电位计组成的电阻网络实现，大部分DC/DC转换器提供有电阻、电位计阻值选用计算公式，可以方便的进行电压调节，但电阻网络中电阻、电位计连接形式固定，使用范围具有局限性。针对需要将电位器两端直接接负载，只用电位计中间引脚来调节DC/DC转换器输出电压的场合就不适用。At present, the output voltage adjustment of DC/DC converters is mostly realized by a resistance network composed of resistors and potentiometers. Most DC/DC converters provide calculation formulas for selecting the resistance values of resistors and potentiometers, which can facilitate voltage adjustment. However, the resistance network The connection form of medium resistance and potentiometer is fixed, and the scope of use is limited. It is not suitable for occasions where both ends of the potentiometer need to be directly connected to the load, and only the middle pin of the potentiometer is used to adjust the output voltage of the DC/DC converter.

发明内容Contents of the invention

有鉴于此，为解决上述现有技术的不足，本发明的目的在于提供了一种DC-DC转换器远端调压电路，利用电位计可调节性能对输出电压进行采集，对采集的输出电压进行远端调整，通过改变电压调节端电压实现对DC/DC转换器输出电压调节。In view of this, in order to solve the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a DC-DC converter remote voltage regulation circuit, which uses the adjustable performance of the potentiometer to collect the output voltage, and the collected output voltage Remote adjustment is performed to adjust the output voltage of the DC/DC converter by changing the voltage at the voltage adjustment terminal.

为实现上述目的，本发明所采用的技术方案是：To achieve the above object, the technical solution adopted in the present invention is:

一种DC-DC转换器远端调压电路，包括第一DC/DC转换器、第一电位计、第一电阻、第二电阻、第一运算放大器、第三电阻、第四电阻、第五电阻、第六电阻、第二运算放大器、第七电阻、第八电阻、第九电阻、第一基准源、第一电容、第三运算放大器、两个输出端口+OUT、-OUT、供电端口VCC和GND；A DC-DC converter remote voltage regulation circuit, comprising a first DC/DC converter, a first potentiometer, a first resistor, a second resistor, a first operational amplifier, a third resistor, a fourth resistor, a fifth Resistor, sixth resistor, second operational amplifier, seventh resistor, eighth resistor, ninth resistor, first reference source, first capacitor, third operational amplifier, two output ports +OUT, -OUT, power supply port VCC and GND;

输出端口+OUT、第一DC/DC转换器的+VOUT脚、第一电位计的a脚相连，输出端口-OUT、第一DC/DC转换器的-VOUT脚、第一电位计的b脚、第二电阻的b脚、第一运算放大器的c脚、GND端口、第三电阻的a脚、第二运算放大器的c脚、第九电阻的b脚、第一基准源的c脚、第一电容的b脚、第三运算放大器的c脚相连，第一电位计的c脚与第一电阻的a脚相连，第一电阻的b脚与第二电阻的a脚、第一运算放大器的b脚相连，第一运算放大器的a脚、第一运算放大器的d脚、第四电阻的a脚相连，第一运算放大器的e脚、第二运算放大器的e脚、VCC端口、第七电阻、第三运算放大器的e脚相连，第三电阻的b脚、第五电阻的a脚、第二运算放大器的a脚相连，第四电阻的b脚、第六电阻的a脚、第二运算放大器的b脚相连，第五电阻的b脚、第二运算放大器的d脚、第一DC/DC转换器的TRM脚相连，第七电阻的b脚、第八电阻的a脚、第一基准源的a脚、第一基准源的b脚、第一电容的a脚相连，第八电阻的b脚、第九电阻的a脚、第三运算放大器的b脚相连，第三运算放大器的a脚、第三运算放大器的d脚、第六电阻的b脚相连。The output port +OUT, the +VOUT pin of the first DC/DC converter, and the a pin of the first potentiometer are connected, the output port -OUT, the -VOUT pin of the first DC/DC converter, and the b pin of the first potentiometer , pin b of the second resistor, pin c of the first operational amplifier, GND port, pin a of the third resistor, pin c of the second operational amplifier, pin b of the ninth resistor, pin c of the first reference source, pin The b pin of a capacitor is connected to the c pin of the third operational amplifier, the c pin of the first potentiometer is connected to the a pin of the first resistor, the b pin of the first resistor is connected to the a pin of the second resistor, and the a pin of the first operational amplifier The b pin is connected, the a pin of the first operational amplifier, the d pin of the first operational amplifier, and the a pin of the fourth resistor are connected, the e pin of the first operational amplifier, the e pin of the second operational amplifier, the VCC port, and the seventh resistor , The e pin of the third operational amplifier is connected, the b pin of the third resistor, the a pin of the fifth resistor, and the a pin of the second operational amplifier are connected, the b pin of the fourth resistor, the a pin of the sixth resistor, the second operational amplifier The b pin of the amplifier is connected, the b pin of the fifth resistor, the d pin of the second operational amplifier, and the TRM pin of the first DC/DC converter are connected, the b pin of the seventh resistor, the a pin of the eighth resistor, the first reference The a pin of the source, the b pin of the first reference source, and the a pin of the first capacitor are connected, the b pin of the eighth resistor, the a pin of the ninth resistor, and the b pin of the third operational amplifier are connected, and the a pin of the third operational amplifier is connected The pin, the d pin of the third operational amplifier, and the b pin of the sixth resistor are connected.

进一步的，通过调节所述第一电位计改变第一电位计的c脚的电压，该电压为采样电压。Further, the voltage of pin c of the first potentiometer is changed by adjusting the first potentiometer, and the voltage is a sampling voltage.

进一步的，所述采样电压经第一电阻、第二电阻分压后，缩小比例，输入到第一运算放大器的同相输入端。Further, after the sampling voltage is divided by the first resistor and the second resistor, the ratio is reduced and input to the non-inverting input terminal of the first operational amplifier.

进一步的，所述第二运算放大器、第三电阻、第四电阻、第五电阻、第六电阻组成加法器。Further, the second operational amplifier, the third resistor, the fourth resistor, the fifth resistor, and the sixth resistor form an adder.

进一步的，所述加法器对第一运算放大器输出电压、第三运算放大器输出电压进行相加后，将第三运算放大器的输出端输出到第一DC/DC转换器的TRM脚，改变第一DC/DC转换器的TRM脚电压。Further, after adding the output voltage of the first operational amplifier and the output voltage of the third operational amplifier, the adder outputs the output terminal of the third operational amplifier to the TRM pin of the first DC/DC converter, changing the first The TRM pin voltage of the DC/DC converter.

进一步的，所述VCC端口电压经第七电阻后给第一基准源供电。Further, the VCC port voltage supplies power to the first reference source after passing through the seventh resistor.

本发明的有益效果是：The beneficial effects of the present invention are:

本发明DC-DC转换器远端调压电路，将电位计两端引脚分别接DC/DC转换器输出“+”“-”端，通过调整电位计旋钮，调整电位计中间引脚对输出“-”之间电压，该电压经DC/DC转换器远端调压电路处理后，输入到DC/DC转换器的电压调节端口，改变DC/DC转换器电压调节端口TRM脚电压，从而实现DC-DC转换器在可调节范围内进行任意范围的调节，并且调节范围可精确计算；The remote voltage regulating circuit of the DC-DC converter of the present invention connects the pins at both ends of the potentiometer to the output "+" and "-" terminals of the DC/DC converter respectively, and adjusts the output of the middle pin pair of the potentiometer by adjusting the knob of the potentiometer. The voltage between "-", after the voltage is processed by the remote voltage regulation circuit of the DC/DC converter, it is input to the voltage regulation port of the DC/DC converter, and the voltage of the TRM pin of the voltage regulation port of the DC/DC converter is changed, so as to realize The DC-DC converter can be adjusted in any range within the adjustable range, and the adjustment range can be accurately calculated;

通过负载端接电位计，并通过设置调节电压上限和可调整电压宽度，从而实现DC/DC转换器在输出电压范围内任意范围可精确调整，适用范围广。By connecting the potentiometer to the load terminal, and by setting the upper limit of the adjustable voltage and the adjustable voltage width, the DC/DC converter can be precisely adjusted in any range within the output voltage range, and has a wide range of applications.

附图说明Description of drawings

为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

图1是本发明一种DC-DC转换器远端调压电路原理图。FIG. 1 is a schematic diagram of a remote voltage regulation circuit of a DC-DC converter according to the present invention.

附图标记：1、第一DC/DC转换器，2、第一电位计，3、第一电阻，4、第二电阻，5、第一运算放大器，6、第三电阻，7、第四电阻，8、第五电阻，9、第六电阻，10、第二运算放大器，11、第七电阻，12、第八电阻，13、第九电阻，14、第一基准源，15、第一电容，16、第三运算放大器。Reference signs: 1. first DC/DC converter, 2. first potentiometer, 3. first resistor, 4. second resistor, 5. first operational amplifier, 6. third resistor, 7. fourth Resistor, 8, fifth resistor, 9, sixth resistor, 10, second operational amplifier, 11, seventh resistor, 12, eighth resistor, 13, ninth resistor, 14, first reference source, 15, first Capacitor, 16, the third operational amplifier.

具体实施方式Detailed ways

下面给出具体实施例，对本发明的技术方案作进一步清楚、完整、详细地说明。本实施例是以本发明技术方案为前提的最佳实施例，但本发明的保护范围不限于下述的实施例。Specific examples are given below to further describe the technical solution of the present invention in a clear, complete and detailed manner. This embodiment is the best embodiment on the premise of the technical solution of the present invention, but the protection scope of the present invention is not limited to the following embodiments.

一种DC-DC转换器远端调压电路，如图1所示，包括第一DC/DC转换器1、第一电位计2、第一电阻3、第二电阻4、第一运算放大器5、第三电阻6、第四电阻7、第五电阻8、第六电阻9、第二运算放大器10、第七电阻11、第八电阻12、第九电阻13、第一基准源14、第一电容15、第三运算放大器16、两个输出端口+OUT、-OUT、供电端口VCC和GND；A DC-DC converter remote voltage regulation circuit, as shown in Figure 1, includes a first DC/DC converter 1, a first potentiometer 2, afirst resistor 3, a second resistor 4, and a firstoperational amplifier 5 , the third resistor 6, the fourth resistor 7, the fifth resistor 8, the sixth resistor 9, the secondoperational amplifier 10, the seventh resistor 11, theeighth resistor 12, theninth resistor 13, the first reference source 14, thefirst Capacitor 15, thirdoperational amplifier 16, two output ports +OUT, -OUT, power supply ports VCC and GND;

输出端口+OUT、第一DC/DC转换器1的+VOUT脚、第一电位计2的a脚相连，输出端口-OUT、第一DC/DC转换器1的-VOUT脚、第一电位计2的b脚、第二电阻4的b脚、第一运算放大器5的c脚、GND端口、第三电阻6的a脚、第二运算放大器10的c脚、第九电阻13的b脚、第一基准源14的c脚、第一电容15的b脚、第三运算放大器16的c脚相连，第一电位计2的c脚与第一电阻3的a脚相连，第一电阻3的b脚与第二电阻4的a脚、第一运算放大器5的b脚相连，第一运算放大器5的a脚、第一运算放大器5的d脚、第四电阻7的a脚相连，第一运算放大器5的e脚、第二运算放大器10的e脚、VCC端口、第七电阻11、第三运算放大器16的e脚相连，第三电阻6的b脚、第五电阻8的a脚、第二运算放大器10的a脚相连，第四电阻7的b脚、第六电阻9的a脚、第二运算放大器10的b脚相连，第五电阻8的b脚、第二运算放大器10的d脚、第一DC/DC转换器1的TRM脚相连，第七电阻11的b脚、第八电阻12的a脚、第一基准源14的a脚、第一基准源14的b脚、第一电容15的a脚相连，第八电阻12的b脚、第九电阻13的a脚、第三运算放大器16的b脚相连，第三运算放大器16的a脚、第三运算放大器16的d脚、第六电阻9的b脚相连。The output port +OUT, the +VOUT pin of the first DC/DC converter 1, and the a pin of the first potentiometer 2 are connected, the output port -OUT, the -VOUT pin of the first DC/DC converter 1, the first potentiometer 2, pin b of the second resistor 4, pin c of the firstoperational amplifier 5, GND port, pin a of the third resistor 6, pin c of the secondoperational amplifier 10, pin b of theninth resistor 13, The c pin of the first reference source 14, the b pin of thefirst capacitor 15, and the c pin of the thirdoperational amplifier 16 are connected, the c pin of the first potentiometer 2 is connected with the a pin of thefirst resistor 3, and the c pin of thefirst resistor 3 is connected. The b pin is connected to the a pin of the second resistor 4 and the b pin of the firstoperational amplifier 5, the a pin of the firstoperational amplifier 5, the d pin of the firstoperational amplifier 5, and the a pin of the fourth resistor 7 are connected, and the firstoperational amplifier 5 is connected to the a pin of the fourth resistor 7. The e pin of theoperational amplifier 5, the e pin of the secondoperational amplifier 10, the VCC port, the seventh resistor 11, and the e pin of the thirdoperational amplifier 16 are connected, the b pin of the third resistor 6, the a pin of the fifth resistor 8, The a pin of the secondoperational amplifier 10 is connected, the b pin of the fourth resistor 7, the a pin of the sixth resistor 9, the b pin of the secondoperational amplifier 10 are connected, the b pin of the fifth resistor 8, the secondoperational amplifier 10 The d pin is connected to the TRM pin of the first DC/DC converter 1, the b pin of the seventh resistor 11, the a pin of theeighth resistor 12, the a pin of the first reference source 14, the b pin of the first reference source 14, The a pin of thefirst capacitor 15 is connected, the b pin of theeighth resistor 12, the a pin of theninth resistor 13, the b pin of the thirdoperational amplifier 16 are connected, the a pin of the thirdoperational amplifier 16, the thirdoperational amplifier 16 The d pin is connected to the b pin of the sixth resistor 9 .

将第一电位计2两端引脚分别接第一DC/DC转换器1输出“+”“-”端，通过调整第一电位计2旋钮，调整第一电位计2中间引脚对输出“-”之间电压，该电压经第一DC/DC转换器1远端调压电路处理后，输入到第一DC/DC转换器1的电压调节端口，改变第一DC/DC转换器1电压调节端口TRM脚电压，从而实现第一DC/DC转换器1在可调节范围内进行任意范围的调节，并且调节范围可精确计算。Connect the pins at both ends of the first potentiometer 2 to the output "+" and "-" of the first DC/DC converter 1, and adjust the middle pin pair output of the first potentiometer 2 by adjusting the knob of the first potentiometer 2. The voltage between - ", after the voltage is processed by the remote voltage regulating circuit of the first DC/DC converter 1, it is input to the voltage adjustment port of the first DC/DC converter 1 to change the voltage of the first DC/DC converter 1 By adjusting the voltage of the TRM pin of the port, the first DC/DC converter 1 can be adjusted in any range within the adjustable range, and the adjustment range can be accurately calculated.

进一步的，通过调节所述第一电位计2的的旋钮，改变第一电位计2的c脚的电压，该电压为采样电压。利用电位计可调节性能对输出电压进行采集，通过对采集的输出电压进行远端调整。Further, by adjusting the knob of the first potentiometer 2, the voltage of pin c of the first potentiometer 2 is changed, and the voltage is a sampling voltage. The output voltage is collected by using the adjustable performance of the potentiometer, and the collected output voltage is adjusted remotely.

进一步的，所述采样电压经第一电阻3、第二电阻4分压后，缩小比例，输入到第一运算放大器5的同相输入端。通过设置一定的缩放比例，实现输出电压宽度调节，通过设置合理的电压基准，保证调节电压范围的上限。Further, after the sampling voltage is divided by thefirst resistor 3 and the second resistor 4 , it is scaled down and input to the non-inverting input terminal of the firstoperational amplifier 5 . By setting a certain scaling ratio, the output voltage width adjustment is realized, and by setting a reasonable voltage reference, the upper limit of the adjustment voltage range is guaranteed.

进一步的，所述第二运算放大器10、第三电阻6、第四电阻7、第五电阻8、第六电阻9组成加法器。Further, the secondoperational amplifier 10, the third resistor 6, the fourth resistor 7, the fifth resistor 8, and the sixth resistor 9 form an adder.

进一步的，所述加法器对第一运算放大器5输出电压、第三运算放大器16输出电压进行相加后，将第三运算放大器16的输出端输出到第一DC/DC转换器1的TRM脚，改变第一DC/DC转换器1的TRM脚电压。Further, after adding the output voltage of the firstoperational amplifier 5 and the output voltage of the thirdoperational amplifier 16, the adder outputs the output terminal of the thirdoperational amplifier 16 to the TRM pin of the first DC/DC converter 1 , changing the TRM pin voltage of the first DC/DC converter 1 .

进一步的，所述VCC端口电压经第七电阻11后给第一基准源14供电。Further, the VCC port voltage supplies power to the first reference source 14 after passing through the seventh resistor 11 .

进一步的，第一DC/DC转换器1的+VOUT、-VOUT、TRM的含义是：+VOUT是第一DC/DC转换器1的输出正极，-VOUT是第一DC/DC转换器1的输出负极，TRM是第一DC/DC转换器1的输出调压端。Further, the meanings of +VOUT, -VOUT, and TRM of the first DC/DC converter 1 are: +VOUT is the output positive pole of the first DC/DC converter 1, and -VOUT is the positive pole of the first DC/DC converter 1. Output negative pole, TRM is the output voltage regulating terminal of the first DC/DC converter 1 .

进一步的，第一基准源14的a端、b端、c端的含义是：a端是三端稳压器的阴极，b端是基准源的基准，c端是基准源的阳极。Further, the meanings of terminal a, terminal b and terminal c of the first reference source 14 are: terminal a is the cathode of the three-terminal voltage regulator, terminal b is the reference of the reference source, and terminal c is the anode of the reference source.

进一步的，第一运算放大器5、第二运算放大器10、第三运算放大器16的a端、b端、c端、d端、e端含义是：a端是运放的反相输入端，b端是运放的同向输入端，c端是运放的供电地、d端是运放的输出端、e端是运放的供电端。Further, the meanings of the a terminal, the b terminal, the c terminal, the d terminal and the e terminal of the firstoperational amplifier 5, the secondoperational amplifier 10, and the thirdoperational amplifier 16 are: the a terminal is the inverting input terminal of the operational amplifier, and the b terminal is the inverting input terminal of the operational amplifier. The end is the same input end of the op amp, the c end is the power supply ground of the op amp, the d end is the output end of the op amp, and the e end is the power supply end of the op amp.

工作原理如下：It works as follows:

如图1所示，通过调节第一电位计2的c脚，改变第一电位计2的c脚的电压，该电压即为采样电压，该采样电压经第一电阻3、第二电阻4按一定比例分压，缩小一定比例后输入到第一运算放大器5的同相输入端，经第一运算放大器5组成的电压跟随器后输出到第四电阻7的a端，VCC端口电压经第七电阻11后给第一基准源14供电，第一基准源14输出2.5V电压经第八电阻12、第九电阻13按一定比例分压后输入到第三运算放大器16的同相输入端，经第三运算放大器16组成的电压跟随器后输出到第六电阻9的b端，第一运算放大器5输出电压、第三运算放大器16输出电压经第二运算放大器10、第三电阻6、第四电阻7、第五电阻8、第六电阻9组成的加法器相加后，从第三运算放大器16的输出端输出到第一DC/DC转换器1的TRM脚，从而改变第一DC/DC转换器1的TRM脚电压，第一DC/DC转换器1的输出电压跟随TRM脚电压的改变而改变，实现对第一DC/DC转换器1输出电压的调节；As shown in Figure 1, by adjusting the c pin of the first potentiometer 2, the voltage of the c pin of the first potentiometer 2 is changed, and the voltage is the sampling voltage, and the sampling voltage is pressed by thefirst resistor 3 and the second resistor 4 Divide the voltage at a certain ratio, reduce it by a certain ratio, and input it to the non-inverting input terminal of the firstoperational amplifier 5, and output it to the a terminal of the fourth resistor 7 after passing through the voltage follower composed of the firstoperational amplifier 5, and the voltage of the VCC port passes through the seventh resistor After 11, power is supplied to the first reference source 14, and the first reference source 14 outputs 2.5V voltage, which is input to the non-inverting input terminal of the thirdoperational amplifier 16 after being divided by a certain ratio by theeighth resistor 12 and theninth resistor 13. The voltage follower formed by theoperational amplifier 16 is output to the b end of the sixth resistor 9, the output voltage of the firstoperational amplifier 5 and the output voltage of the thirdoperational amplifier 16 are passed through the secondoperational amplifier 10, the third resistor 6, and the fourth resistor 7 , the fifth resistance 8, and the adder composed of the sixth resistance 9 are summed, and output from the output terminal of the thirdoperational amplifier 16 to the TRM pin of the first DC/DC converter 1, thereby changing the first DC/DC converter The TRM pin voltage of 1, the output voltage of the first DC/DC converter 1 changes following the change of the TRM pin voltage, so as to realize the adjustment of the output voltage of the first DC/DC converter 1;

通过调节第一电位计2的c脚，实现改变第一DC/DC转换器1输出电压的目的。利用电位器中间引脚对输出电压进行采样，并对采样电压进行比例缩放、加法运算后，输出到DC/DC转换器电压调节端，改变DC/DC转换器电压调节端电压，从而实现对DC/DC转换器输出电压进行调节。通过设置一定的缩放比例，实现输出电压宽度调节，通过设置合理的电压基准，保证调节电压范围的上限，从而实现DC/DC转换器可调节范围内进行任意范围的调节。By adjusting the c-pin of the first potentiometer 2, the purpose of changing the output voltage of the first DC/DC converter 1 is realized. Use the middle pin of the potentiometer to sample the output voltage, scale and add the sampled voltage, and output it to the voltage adjustment terminal of the DC/DC converter to change the voltage of the voltage adjustment terminal of the DC/DC converter, so as to achieve DC /DC converter output voltage for regulation. By setting a certain scaling ratio, the output voltage width adjustment is realized, and by setting a reasonable voltage reference, the upper limit of the adjustment voltage range is guaranteed, so as to realize the adjustment of any range within the adjustable range of the DC/DC converter.

本发明电路通过改变电压调节端电压实现对DC/DC转换器输出电压调节，适用范围广，可用于对DC/DC转换器输出电压可调的场合，可精确计算调节范围，并且电压调节范围可任意调整，性能优越。The circuit of the present invention realizes the adjustment of the output voltage of the DC/DC converter by changing the voltage of the voltage adjustment terminal, has a wide application range, and can be used in occasions where the output voltage of the DC/DC converter is adjustable, and the adjustment range can be accurately calculated, and the voltage adjustment range can be adjusted. Arbitrary adjustment, superior performance.

以上显示和描述了本发明的主要特征、基本原理以及本发明的优点。本行业技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会根据实际情况有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。The main features, basic principles and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and that the above-mentioned embodiments and descriptions only illustrate the principles of the present invention, and the present invention will also be based on actual conditions without departing from the spirit and scope of the present invention. There are various changes and modifications of the situation which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A kind of DC-DC converter far-end voltage regulation circuit, characterized by that: the device comprises a first DC/DC converter (1), a first potentiometer (2), a first resistor (3), a second resistor (4), a first operational amplifier (5), a third resistor (6), a fourth resistor (7), a fifth resistor (8), a sixth resistor (9), a second operational amplifier (10), a seventh resistor (11), an eighth resistor (12), a ninth resistor (13), a first reference source (14), a first capacitor (15), a third operational amplifier (16), two output ports + OUT, -OUT, a power supply port VCC and GND;

the output port + OUT, the pin + VOUT of the first DC/DC converter (1), the pin a of the first potentiometer (2), the output port-OUT, the pin-VOUT of the first DC/DC converter (1), the pin b of the first potentiometer (2), the pin b of the second resistor (4), the pin c of the first operational amplifier (5), the GND port, the pin a of the third resistor (6), the pin c of the second operational amplifier (10), the pin b of the ninth resistor (13), the pin c of the first reference source (14), the pin b of the first capacitor (15), the pin c of the third operational amplifier (16), the pin c of the first potentiometer (2) is connected with the pin a of the first resistor (3), the pin b of the first resistor (3) is connected with the pin a of the second resistor (4), the pin b of the first operational amplifier (5), the pin a pin VCC of the first operational amplifier (5), the pin d of the fourth resistor (7), the pin b of the operational amplifier (6), the pin b of the operational amplifier (10), the pin b of the fourth resistor (6), the operational amplifier (10), the pin b) is connected with the pin b of the operational amplifier (16), the operational amplifier (6), the pin b) and the pin of the operational amplifier (10), the pin b of the operational amplifier (6) is connected with the pin b of the operational amplifier (10) and the fourth operational amplifier (10) and the operational amplifier (10, the pin b of the second operational amplifier (10) is connected, the pin b of the fifth resistor (8), the pin d of the second operational amplifier (10) and the pin TRM of the first DC/DC converter (1) are connected, the pin b of the seventh resistor (11), the pin a of the eighth resistor (12), the pin a of the first reference source (14), the pin b of the first reference source (14) and the pin a of the first capacitor (15) are connected, the pin b of the eighth resistor (12), the pin a of the ninth resistor (13) and the pin b of the third operational amplifier (16) are connected, and the pin a of the third operational amplifier (16), the pin d of the third operational amplifier (16) and the pin b of the sixth resistor (9) are connected.

2. The remote voltage regulation circuit of claim 1, wherein: and changing the voltage of a pin c of the first potentiometer (2) by adjusting a knob of the first potentiometer (2), wherein the voltage is a sampling voltage.

3. The remote voltage regulating circuit of claim 2, wherein: the sampling voltage is divided by the first resistor (3) and the second resistor (4), then the sampling voltage is reduced in proportion and input to the non-inverting input end of the first operational amplifier (5).

4. The remote voltage regulation circuit of claim 1, wherein: the second operational amplifier (10), the third resistor (6), the fourth resistor (7), the fifth resistor (8) and the sixth resistor (9) form an adder.

5. The remote voltage regulation circuit of claim 4, wherein: the adder adds the output voltage of the first operational amplifier (5) and the output voltage of the third operational amplifier (16), outputs the output end of the third operational amplifier (16) to the TRM pin of the first DC/DC converter (1), and changes the TRM pin voltage of the first DC/DC converter (1).

6. The remote voltage regulation circuit of claim 1, wherein: and the voltage of the VCC port supplies power to a first reference source (14) after passing through a seventh resistor (11).

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