CN221652468U - A transformer-free high voltage boost circuit - Google Patents
A transformer-free high voltage boost circuit Download PDFInfo
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Abstract
本实用新型涉及一种无变压器的高压升压电路，它包括电源及电路使能输入端P1、升压芯片U1、分压稳压电路、振荡电路、电压升压倍压电路和高压电压输出端P2；电源及电路使能输入端P1与升压芯片U1连接，升压芯片U1与分压稳压电路和振荡电路连接，以及通过MOS管Q1分别与升压电感L1和电压升压倍压电路连接，分压稳压电路与电压升压倍压电路连接，电压升压倍压电路与高压电压输出端P2连接。本实用新型转换效率高，功耗小，带有电压反馈端，输出电压稳定可靠，并带有使能端，可控制高压电路的输出，进一步达到降低整机功耗的目的。
The utility model relates to a transformer-free high-voltage boost circuit, which includes a power supply and circuit enable input terminal P1, a boost chip U1, a voltage-dividing and voltage-stabilizing circuit, an oscillating circuit, a voltage-boosting and voltage-doubling circuit, and a high-voltage voltage output terminal P2; the power supply and circuit enable input terminal P1 is connected to the boost chip U1, the boost chip U1 is connected to the voltage-dividing and voltage-stabilizing circuit and the oscillating circuit, and is respectively connected to the boost inductor L1 and the voltage-boosting and voltage-doubling circuit through a MOS tube Q1, the voltage-dividing and voltage-stabilizing circuit is connected to the voltage-boosting and voltage-doubling circuit, and the voltage-boosting and voltage-doubling circuit is connected to the high-voltage voltage output terminal P2. The utility model has high conversion efficiency, low power consumption, a voltage feedback terminal, a stable and reliable output voltage, and an enable terminal, which can control the output of the high-voltage circuit, and further achieve the purpose of reducing the power consumption of the whole machine.
Description
技术领域Technical Field
本实用新型涉及电子电路技术领域，尤其涉及一种无变压器的高压升压电路。The utility model relates to the technical field of electronic circuits, in particular to a transformer-free high-voltage boost circuit.
背景技术Background Art
目前市面核辐射检测仪很多是采用盖革弥勒计数器对X射线、β射线和γ射线进行检测，而盖革计数器高压驱动电路，大多都是使用变压器升压，这种驱动方式存在变压器体积大，转换效率不高及功耗较大等缺点，不适合电池供电的便携式采集设备使用。Currently, many nuclear radiation detectors on the market use Geiger-Muller counters to detect X-rays, beta rays and gamma rays. However, most high-voltage drive circuits of Geiger counters use transformers for voltage boosting. This drive method has disadvantages such as large transformer size, low conversion efficiency and high power consumption, and is not suitable for battery-powered portable acquisition equipment.
实用新型内容Utility Model Content
本实用新型的目的在于克服现有技术的缺点，提供一种无变压器的高压升压电路，解决了现有技术存在的不足。The purpose of the utility model is to overcome the shortcomings of the prior art, provide a transformer-free high-voltage boost circuit, and solve the deficiencies of the prior art.
本实用新型的目的通过以下技术方案来实现：一种无变压器的高压升压电路，它包括电源及电路使能输入端P1、升压芯片U1、分压稳压电路、振荡电路、电压升压倍压电路和高压电压输出端P2；The purpose of the utility model is achieved by the following technical solutions: a transformerless high-voltage boost circuit, which includes a power supply and circuit enable input terminal P1, a boost chip U1, a voltage-dividing and voltage-stabilizing circuit, an oscillating circuit, a voltage-boosting and voltage-doubling circuit, and a high-voltage voltage output terminal P2;
所述电源及电路使能输入端P1与升压芯片U1连接，升压芯片U1与分压稳压电路和振荡电路连接，以及通过MOS管Q1分别与升压电感L1和电压升压倍压电路连接，分压稳压电路与电压升压倍压电路连接，电压升压倍压电路与高压电压输出端P2连接。The power supply and circuit enable input terminal P1 is connected to the boost chip U1, the boost chip U1 is connected to the voltage divider and voltage regulator circuit and the oscillation circuit, and is respectively connected to the boost inductor L1 and the voltage boost and voltage doubler circuit through the MOS tube Q1, the voltage divider and voltage regulator circuit is connected to the voltage boost and voltage doubler circuit, and the voltage boost and voltage doubler circuit is connected to the high voltage output terminal P2.
所述电源及电路使能输入端P1的第1引脚连接电池电压正极，第2引脚接电路使能输入端，第3引脚接地。The first pin of the power supply and circuit enable input terminal P1 is connected to the positive electrode of the battery voltage, the second pin is connected to the circuit enable input terminal, and the third pin is grounded.
所述升压芯片U1的第1引脚连接分压稳压电路，第2引脚通过电容C6接地，第3引脚连接电池电源正极，第4引脚连接限流电阻R2的一端，第5引脚连接并联的电阻R1和二极管D11的一端，并联的电阻R1和二极管D11的另一端连接MOS管Q1，第6引脚接地，第7引脚连接振荡电路，第8引脚通过电容C5接地；The first pin of the boost chip U1 is connected to the voltage divider and voltage stabilization circuit, the second pin is grounded through the capacitor C6, the third pin is connected to the positive electrode of the battery power supply, the fourth pin is connected to one end of the current limiting resistor R2, the fifth pin is connected to one end of the parallel resistor R1 and the diode D11, the other end of the parallel resistor R1 and the diode D11 is connected to the MOS tube Q1, the sixth pin is grounded, the seventh pin is connected to the oscillation circuit, and the eighth pin is grounded through the capacitor C5;
限流电阻R2的另一端连接MOS管Q2的第3引脚，MOS管Q2的第2引脚接地，MOS管Q2的第1引脚通过电阻R5连接电路使能输入端，并连接一上拉电阻R3。The other end of the current limiting resistor R2 is connected to the third pin of the MOS transistor Q2, the second pin of the MOS transistor Q2 is grounded, and the first pin of the MOS transistor Q2 is connected to the circuit enable input terminal through the resistor R5 and is connected to a pull-up resistor R3.
所述MOS管Q1的第1引脚连接振荡电路，第2引脚接地，第3引脚连接升压电感L1的一端，升压电感L1的另一端连接电池电源正极，所述电压升压倍压电路连接在MOS管Q1的第2引脚和第3引脚之间。The first pin of the MOS tube Q1 is connected to the oscillation circuit, the second pin is grounded, the third pin is connected to one end of the boost inductor L1, the other end of the boost inductor L1 is connected to the positive electrode of the battery power supply, and the voltage boosting and doubling circuit is connected between the second pin and the third pin of the MOS tube Q1.
所述分压稳压电路包括电阻R6和R7以及电容C15和C16，所述电阻R6和R7串联，电容C15和C16串联，且电阻R6和R7与电容C15和C16并联，电阻R7和电容C16的一端接地，电阻R6和电容C15的一端连接电压升压倍压电路，所述升压芯片U1的第1引脚连接电阻R6和R7以及电容C15和C16的串联端。The voltage divider and voltage stabilization circuit includes resistors R6 and R7 and capacitors C15 and C16, the resistors R6 and R7 are connected in series, the capacitors C15 and C16 are connected in series, and the resistors R6 and R7 are connected in parallel with the capacitors C15 and C16, one end of the resistor R7 and the capacitor C16 is grounded, one end of the resistor R6 and the capacitor C15 is connected to the voltage boosting and doubling circuit, and the first pin of the boost chip U1 is connected to the series end of the resistors R6 and R7 and the capacitors C15 and C16.
所述振荡电路包括并联的电阻R4和电容C14，升压芯片U1的第7引脚连接电阻R4和电容C14的一端，电阻R4和电容C14的另一端接地。The oscillation circuit includes a resistor R4 and a capacitor C14 connected in parallel. The seventh pin of the boost chip U1 is connected to one end of the resistor R4 and the capacitor C14, and the other end of the resistor R4 and the capacitor C14 is grounded.
所述电压升压倍压电路包括依次并联的二极管D1、D2、D3、D4、D5、D6、D7、D8、D9和D10，且二极管D1、D3、D5、D7和D9的正极均连接MOS管Q1的第3引脚，负极均连接MOS管Q1的第2引脚；二极管D2、D4、D6、D8和D10的正极均连接MOS管Q1的第2引脚，负极均连接MOS管Q1的第3引脚；The voltage boost and voltage doubling circuit comprises diodes D1, D2, D3, D4, D5, D6, D7, D8, D9 and D10 which are sequentially connected in parallel, and the positive electrodes of the diodes D1, D3, D5, D7 and D9 are all connected to the third pin of the MOS tube Q1, and the negative electrodes are all connected to the second pin of the MOS tube Q1; the positive electrodes of the diodes D2, D4, D6, D8 and D10 are all connected to the second pin of the MOS tube Q1, and the negative electrodes are all connected to the third pin of the MOS tube Q1;
在两个二极管之间均连接有一电容，且电容连接在前一个二极管的正极和后一个二极管的负极之间，所述二极管D1的负极还与电阻R6和电容C15的一端连接，在二极管D1的负极和MOS管Q1的第2引脚之间连接有电容C11，二极管D10的负极还连接二极管D12的正极，二极管D10的正极连接电容C18，二极管D12的负极和电容C18连接高压电压输出端P2。A capacitor is connected between the two diodes, and the capacitor is connected between the positive electrode of the previous diode and the negative electrode of the latter diode. The negative electrode of the diode D1 is also connected to the resistor R6 and one end of the capacitor C15. The capacitor C11 is connected between the negative electrode of the diode D1 and the second pin of the MOS tube Q1. The negative electrode of the diode D10 is also connected to the positive electrode of the diode D12. The positive electrode of the diode D10 is connected to the capacitor C18. The negative electrode of the diode D12 and the capacitor C18 are connected to the high voltage output terminal P2.
本实用新型具有以下优点：一种无变压器的高压升压电路，电路转换效率高，功耗小，带有电压反馈端，输出电压稳定可靠，并带有使能端，可控制高压电路的输出，进一步达到降低整机功耗的目的。The utility model has the following advantages: a transformerless high-voltage boost circuit with high circuit conversion efficiency, low power consumption, a voltage feedback terminal, a stable and reliable output voltage, and an enable terminal that can control the output of the high-voltage circuit, thereby further achieving the purpose of reducing the power consumption of the entire machine.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本实用新型的电路结构示意图。FIG1 is a schematic diagram of the circuit structure of the utility model.
具体实施方式DETAILED DESCRIPTION
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本申请实施例的组件可以以各种不同的配置来布置和设计。因此，以下结合附图中提供的本申请的实施例的详细描述并非旨在限制要求保护的本申请的保护范围，而是仅仅表示本申请的选定实施例。基于本申请的实施例，本领域技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本申请保护的范围。下面结合附图对本实用新型做进一步的描述。In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present application provided below in conjunction with the drawings is not intended to limit the scope of protection of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application. The utility model is further described below in conjunction with the drawings.
如图1所示，具体涉及一种基于boost原理适合3.7V锂电池供电的高压升压电路，输出电压在380V-420V，输出电流5mA以下，它包括电源及电路使能输入端P1、升压芯片U1、分压稳压电路、振荡电路、电压升压倍压电路和高压电压输出端P2；电源及电路使能输入端P1与升压芯片U1连接，升压芯片U1与分压稳压电路和振荡电路连接，以及通过MOS管Q1分别与升压电感L1和电压升压倍压电路连接，分压稳压电路与电压升压倍压电路连接，电压升压倍压电路与高压电压输出端P2连接。As shown in FIG1 , it specifically relates to a high-voltage boost circuit suitable for 3.7V lithium battery power supply based on the boost principle, with an output voltage of 380V-420V and an output current of less than 5mA. It includes a power supply and circuit enable input terminal P1, a boost chip U1, a voltage divider and voltage regulator circuit, an oscillation circuit, a voltage boost and voltage doubler circuit and a high-voltage voltage output terminal P2; the power supply and circuit enable input terminal P1 is connected to the boost chip U1, the boost chip U1 is connected to the voltage divider and voltage regulator circuit and the oscillation circuit, and is respectively connected to the boost inductor L1 and the voltage boost and voltage doubler circuit through the MOS tube Q1, the voltage divider and voltage regulator circuit is connected to the voltage boost and voltage doubler circuit, and the voltage boost and voltage doubler circuit is connected to the high-voltage voltage output terminal P2.
进一步地，升压芯片U1为FP5139芯片U1，作为电路升压核心，P1是锂电池电源输入端及电路使能输入端。P1的第1脚接电池电源正，第2脚接电路使能端输入，第3脚接电源负。U1的第1脚是输出电压反馈输入端，连接输出电压分压电阻R6，及R7端，该电压为0.5V。C15并接在R6两端，C16并接在R7两端起电压稳压滤波作用。U1的第2脚连接电容C6，C6另一端接GND，该电容起U1软起动作用。U1的第3脚接4.2V电源输入，C7滤波电容并在4.2V输入电源正和负端。U1的第4脚是芯片输出使能端，连接到限流电阻R2一端，R2另一端连接到NMOS管Q2第3脚，Q2第2脚接GND，第1脚接R3和R5，R3是控制信号上拉电阻，另一端连4.2V。R5另一端连P1第2脚。Furthermore, the boost chip U1 is the FP5139 chip U1, which serves as the core of the circuit boost. P1 is the lithium battery power input terminal and the circuit enable input terminal. The first pin of P1 is connected to the positive battery power supply, the second pin is connected to the circuit enable input terminal, and the third pin is connected to the negative power supply. The first pin of U1 is the output voltage feedback input terminal, which is connected to the output voltage divider resistor R6 and the R7 terminal. The voltage is 0.5V. C15 is connected in parallel to both ends of R6, and C16 is connected in parallel to both ends of R7 to play a voltage stabilization and filtering role. The second pin of U1 is connected to the capacitor C6, and the other end of C6 is connected to GND. The capacitor plays a role in the soft start of U1. The third pin of U1 is connected to the 4.2V power supply input, and the C7 filter capacitor is connected to the positive and negative ends of the 4.2V input power supply. The 4th pin of U1 is the chip output enable terminal, connected to one end of the current limiting resistor R2, the other end of R2 is connected to the 3rd pin of NMOS tube Q2, the 2nd pin of Q2 is connected to GND, the 1st pin is connected to R3 and R5, R3 is the control signal pull-up resistor, the other end is connected to 4.2V. The other end of R5 is connected to the 2nd pin of P1.
U1的第5脚是PWM(脉宽调制信号)输出脚，通过并联的电阻R1和二极管D11后用于控制MOS管Q1。The 5th pin of U1 is the PWM (pulse width modulation signal) output pin, which is used to control the MOS tube Q1 through the parallel resistor R1 and the diode D11.
U1的第6脚接GND，U1的第7脚接电阻R4，电容C14，电阻R4和电容C14并连，一端接U1的第7脚，另一端接GND。R4和C14构成RC振荡电路，决定U1脉宽调制输出信号的频率。U1第8脚连接电容C5后接GND。The 6th pin of U1 is connected to GND, the 7th pin of U1 is connected to resistor R4 and capacitor C14, and resistor R4 and capacitor C14 are connected in parallel, one end is connected to the 7th pin of U1, and the other end is connected to GND. R4 and C14 form an RC oscillator circuit, which determines the frequency of the pulse width modulation output signal of U1. The 8th pin of U1 is connected to capacitor C5 and then to GND.
L1是升压电感，一端连接4.2V，另一端连接NMOS管Q1，第3脚。Q1第2脚接GND。L1 is a boost inductor, one end of which is connected to 4.2V, and the other end is connected to the NMOS tube Q1, pin 3. The second pin of Q1 is connected to GND.
二极管D1，D2，D3，D4，D5，D6，D7，D8，D9，D10，D12及高压电容C1，C2，C3，C4，C17，C11，C12，C8,C9，C10，C18，C13构成电压升压倍压电路，将U1升压后的60V电压进一步升压，达到设计所需的400V左右的电压。Diodes D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D12 and high-voltage capacitors C1, C2, C3, C4, C17, C11, C12, C8, C9, C10, C18, C13 form a voltage boost and voltage doubling circuit, which further boosts the 60V voltage boosted by U1 to reach the required voltage of about 400V.
P2是高压电压输出端，第3脚连接到二极管D12负端。第1脚连接到GND端。P2 is the high voltage output terminal, the 3rd pin is connected to the negative terminal of diode D12, and the 1st pin is connected to the GND terminal.
以上所述仅是本实用新型的优选实施方式，应当理解本实用新型并非局限于本文所披露的形式，不应看作是对其他实施例的排除，而可用于各种其他组合、修改和完善，并能够在本文所述构想范围内，通过上述教导或相关领域的技术或知识进行改动。而本领域人员所进行的改动和变化不脱离本实用新型的精神和范围，则都应在本实用新型所附权利要求的保护范围内。The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used for various other combinations, modifications and improvements, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge in the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.
Claims (7)
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