技术领域technical field
本实用新型涉及电源控制技术领域，特别涉及一种多电源控制电路。The utility model relates to the technical field of power supply control, in particular to a multi-power supply control circuit.
背景技术Background technique
电源是将其它形式的能转换成电能的装置，是电子设备的运行能力之源。电源在接通之初到提供稳定的输出需要一定的稳定周期，在这个稳定周期中电源输出的稳定度很难保证，所以电源从启动到正常供电通常需延时100ms-500ms。A power supply is a device that converts other forms of energy into electrical energy, and is the source of the operating capabilities of electronic equipment. It takes a certain stabilization period from the beginning of the power supply to provide a stable output. In this stabilization period, the stability of the power supply output is difficult to guarantee, so the power supply usually needs a delay of 100ms-500ms from startup to normal power supply.
电子设备通常需要配备多个不同电压的电源，如输出电压为3.3v、2.8v、1.8v、1.2v等的电源，多个不同电压的电源上电时序要满足一定要求，上电时序控制的设计比较复杂，一般情况下，电源的上电时序为先高后底，例如输出电压为2.5v的电源先于输出电压为1.8v的电源启动供电。现在电子设备的电源大体上分为外围电路供电的电源和为内核供电的电源，一般情况下，为外围电路供电的电源输出电压高，要求先上电，为内核供电的电源输出电压低，后上电，只有多个电源严格按照一定的时序上电启动，电子设备才能正常工作。Electronic equipment usually needs to be equipped with multiple power supplies with different voltages, such as power supplies with output voltages of 3.3v, 2.8v, 1.8v, 1.2v, etc. The power-on sequence of multiple power supplies with different voltages must meet certain requirements, and the power-on sequence control The design is more complicated. In general, the power-on sequence of the power supply is high first and then low. For example, a power supply with an output voltage of 2.5v starts to supply power before a power supply with an output voltage of 1.8v. Nowadays, the power supply of electronic equipment is roughly divided into the power supply for the peripheral circuit and the power supply for the core. Generally, the output voltage of the power supply for the peripheral circuit is high, and it is required to be powered on first, and the output voltage of the power supply for the core is low. When powering on, electronic equipment can work normally only when multiple power supplies are powered on and started in strict accordance with a certain sequence.
目前电源上电时序控制的方案应用较多的是用CPLD(ComplexProgrammable Logic Device，复杂可编程逻辑器件)来控制的，把不同电源的使能控制信号连接到CPLD上，通过固化在CPLD中的逻辑程序依次控制各个电源的启动上电时序，以实现多个电源依一定的时序启动上电。还有一种方案是利用上一级电源的P.G(Power_Good，电源正常)信号连接下一级电源的使能控制信号，最先启动上电的第一级电源的使能控制信号直接通过上拉电阻拉到供电电源。At present, the power-on sequence control scheme is mostly controlled by CPLD (Complex Programmable Logic Device, complex programmable logic device). The enabling control signals of different power supplies are connected to the CPLD, and the logic in the CPLD is solidified. The program controls the start-up and power-on sequence of each power supply in turn, so as to realize the start-up and power-on of multiple power supplies according to a certain sequence. Another solution is to use the P.G (Power_Good) signal of the upper level power supply to connect the enable control signal of the next level power supply, and the enable control signal of the first level power supply that is powered on first passes directly through the pull-up resistor. Pull to power supply.
现有的电源上电时序控制的方案存在其不足，具体如下：CPLD电源上电时序控制的方案，需要增加CPLD芯片，设置独立的电源给CPLD供电且需要编写CPLD程序，电子设备生产流程中需要加入CPLD固化程序操作，提高了成本；利用上一级电源的电源正常信号连接下一级电源的使能控制信号的时序控制方案，存在的问题是有的电源没有P.G信号，无法实现上电控制。The existing power-on sequence control scheme has its shortcomings, as follows: the CPLD power-on sequence control scheme needs to add a CPLD chip, set an independent power supply to supply power to the CPLD, and need to write a CPLD program, which is required in the production process of electronic equipment. The cost is increased by adding CPLD curing program operation; the timing control scheme of using the power normal signal of the upper level power supply to connect the enable control signal of the next level power supply has the problem that some power supplies do not have P.G signal, and power-on control cannot be realized .
实用新型内容Utility model content
本实用新型针对上述问题，提出了一种多电源控制电路，用以提供按时序上电启动的多电源供电系统。Aiming at the above problems, the utility model proposes a multi-power supply control circuit, which is used to provide a multi-power supply system that is powered on and started in sequence.
本实用新型提供了一种多电源控制电路，包括多个电源模块，多个电源模块中先后上电的两个电源模块之间通过数字逻辑门电路连接，多个电源模块中先后上电的两个电源模块中先上电的电源模块的输出端连接至数字逻辑门电路的输入端，数字逻辑门电路的输出端连接至多个电源模块中先后上电的两个电源模块中后上电的电源模块的使能控制信号接口，其中，所述多个电源模块是按预设的先后顺序依次上电的。The utility model provides a multi-power supply control circuit, which includes a plurality of power supply modules. Among the plurality of power supply modules, two power supply modules that are powered on successively are connected through a digital logic gate circuit. Among the power modules, the output terminal of the power module that is powered on first is connected to the input terminal of the digital logic gate circuit, and the output terminal of the digital logic gate circuit is connected to the power supply that is powered on later among the two power supply modules that are powered on successively. The enable control signal interface of the module, wherein the multiple power supply modules are powered on in sequence according to a preset sequence.
本实用新型有益效果如下：The beneficial effects of the utility model are as follows:
本实用新型实施例通过在需按时序上电启动的多个电源模块中先后上电的两个电源模块间设置数据逻辑门电路，连接该两个电源模块，可以严格控制这两个电源模块的上电先后顺序，以保证在供电的多个电源模块按预设时序上电供电，确保通过多个电源模块供电的电子设备正常工作。In the embodiment of the utility model, a data logic gate circuit is set between two power supply modules that need to be powered on in sequence to connect the two power supply modules, so that the power of the two power supply modules can be strictly controlled. The order of power-on is to ensure that multiple power supply modules are powered on and supply power according to the preset sequence, so as to ensure the normal operation of electronic equipment powered by multiple power supply modules.
附图说明Description of drawings
下面将参照附图描述本实用新型的具体实施例，其中：Specific embodiments of the present utility model will be described below with reference to the accompanying drawings, wherein:
图1为本实用新型实施例中提供的多电源控制电路的示意图；1 is a schematic diagram of a multi-power supply control circuit provided in an embodiment of the present invention;
图2为本实用新型实施例中提供的多电源控制电路的实施例一的示意图；FIG. 2 is a schematic diagram of Embodiment 1 of the multi-power supply control circuit provided in the embodiment of the present invention;
图3为本实用新型实施例中提供的多电源控制电路的实施例二的示意图；FIG. 3 is a schematic diagram of Embodiment 2 of the multi-power supply control circuit provided in the embodiment of the present invention;
图4为集电极开路电路图。Figure 4 is an open collector circuit diagram.
具体实施方式Detailed ways
为了使本实用新型的技术方案及优点更加清楚明白，以下结合附图对本实用新型的示例性实施例进行进一步详细的说明，显然，所描述的实施例仅是本实用新型的一部分实施例，而不是所有实施例的穷举。In order to make the technical solutions and advantages of the present utility model clearer, the exemplary embodiments of the present utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the present utility model, and Not an exhaustive list of all embodiments.
图1为本实用新型实施例中提供的多电源控制电路的示意图，如图1所示，该多电源控制电路，包括多个电源模块，多个电源模块中先后上电的两个电源模块之间通过数字逻辑门电路连接，多个电源模块中先后上电的两个电源模块中先上电的电源模块的输出端连接至数字逻辑门电路的输入端，数字逻辑门电路的输出端连接至多个电源模决中先后上电的两个电源模块中后上电的电源模块的使能控制信号接口，其中，所述多个电源模块是按预设的先后顺序依次上电的。Figure 1 is a schematic diagram of the multi-power supply control circuit provided in the embodiment of the present invention. As shown in Figure 1, the multi-power supply control circuit includes a plurality of power supply modules, and one of the two power supply modules that are powered on successively among the plurality of power supply modules Between multiple power supply modules, the output terminal of the power supply module that is powered on first among the two power supply modules powered on successively is connected to the input terminal of the digital logic gate circuit, and the output terminal of the digital logic gate circuit is connected to at least Among the two power modules that are powered on successively in one power module, the enable control signal interface of the power module that is powered on later, wherein, the multiple power modules are powered on in sequence according to the preset sequence.
具体实施中，一个电子设备需要多个电源模块进行供电，且对这多个电源模块的上电时序有严格要求，即多个电源模块需按预设的先后顺序依次上电，这多个电源模块中任意两个电源模块存在上电的先后顺序，为了方便说明，将多个电源模块中先后上电的两个电源模块中先上电的电源模块，简称为先上电的电源模块，将多个电源模块中先后上电的两个电源模块中后上电的电源模块，简称为后上电的电源模块。如图1，Vin为先上电的电源模块的输入，V1为先上电的电源模块的输出信号，V2为后上电的电源模块的输出信号。本实用新型通过在多个电源模块中先后上电的两个电源模块设置数字逻辑门电路，由先上电的电源模块的输出作为数据逻辑门电路的输入，数据逻辑门电路的输出作为后上电的电源模块的使能控制信号输入，即在先上电的电源模块启动后，控制数字逻辑门电路启动，数字逻辑门电路启动后，将输出传输至后上电的电源模块的使能控制信号接口启动后上电的电源模块。In specific implementation, an electronic device needs multiple power supply modules to supply power, and there are strict requirements on the power-on sequence of these multiple power supply modules, that is, multiple power supply There is a power-on sequence for any two power modules in the module. For the convenience of description, the power module that is powered on first among the two power modules that are powered on successively among multiple power modules is referred to as the power module that is powered on first. Among the two power modules that are powered on successively, the power module that is powered on later is referred to as the power module that is powered on last. As shown in Figure 1, Vin is the input of the power module that is powered on first, V1 is the output signal of the power module that is powered on first, and V2 is the output signal of the power module that is powered on later. The utility model sets digital logic gate circuits through two power supply modules that are powered on successively among multiple power supply modules. The enable control signal input of the electric power module, that is, after the power module that is powered on first is started, the digital logic gate circuit is controlled to start, and after the digital logic gate circuit is started, the output is transmitted to the enable control of the power module that is powered on later The power module that is powered on after the signal interface is started.
实施中，数字逻辑门电路的输出端可以通过上拉电阻R4上拉至高电平。如图1所示，R4为数据逻辑门电路输出端的上拉电阻，Vcc为数据逻辑门电路输出端通过R4上拉至的高电平。In implementation, the output terminal of the digital logic gate circuit can be pulled up to a high level through the pull-up resistor R4. As shown in FIG. 1 , R4 is a pull-up resistor at the output end of the data logic gate circuit, and Vcc is a high level to which the output end of the data logic gate circuit is pulled up through R4.
图2和图3分别为本实用新型提供的多电源控制电路的实施例一和实施例二的示意图，如图2和图3示，本实用新型实施例中的数字逻辑门电路可以为漏极开路电路或集电极开路电路。Figure 2 and Figure 3 are schematic diagrams of Embodiment 1 and Embodiment 2 of the multi-power supply control circuit provided by the utility model respectively, as shown in Figure 2 and Figure 3, the digital logic gate circuit in the embodiment of the utility model can be a drain open circuit or open collector circuit.
集电极开路电路和漏极开路电路是电路中常见的两种。在数字电路中，分别简称OC门和OD门。集电极开路电路中的“集”就是指三极管的集电极。同理，漏极开路电路中的“漏”是指金属-氧化层半导体场效晶体管的漏极。Open-collector circuits and open-drain circuits are two types that are commonly found in electrical circuits. In digital circuits, they are referred to as OC gate and OD gate respectively. The "collector" in the open collector circuit refers to the collector of the triode. Similarly, the "drain" in an open-drain circuit refers to the drain of a metal-oxide semiconductor field effect transistor.
典型的集电极开路电路如图4所示，当电路中右侧的三极管集电极什么都不接时，左侧的三极管实现反相作用，即左例输入低电平时左侧三极管截止，电源VCC通过电阻R3加到右侧三极管基极，右侧三极管导通，右侧输出端连接到地，输出低电平。集电极开路无法输出高电平，在输出端加上上拉电阻可以输出高电平，因此集电极开路输出可以用做电平转换，通过上拉电阻上拉至不同的电压，来实现不同的电平转换。三极管开路电路中的集电极、基极、发射极分别对应于漏极开路电路中的漏极、栅极、源极。同理，可推知金属-氧化层半导体场效晶体管的漏极电路。A typical open-collector circuit is shown in Figure 4. When the collector of the right triode in the circuit is not connected to anything, the left triode realizes the anti-phase effect, that is, when the left example inputs a low level, the left triode is cut off, and the power supply VCC The resistor R3 is added to the base of the right transistor, the right transistor is turned on, the right output terminal is connected to the ground, and the output is low. The open collector cannot output high level. Adding a pull-up resistor to the output can output high level, so the open-collector output can be used as a level shifter, and pull up to different voltages through the pull-up resistor to achieve different voltage levels. level translation. The collector, base, and emitter in the triode open circuit correspond to the drain, gate, and source in the open-drain circuit, respectively. In the same way, the drain circuit of the metal-oxide semiconductor field effect transistor can be deduced.
如图1所示，实施中，多个电源模块中先后上电的两个电源模块中先上电的电源模块的输出端与数据逻辑门电路之间可以串接电阻R1。As shown in FIG. 1 , during implementation, a resistor R1 may be connected in series between the output terminal of the power module that is powered on first among the two power modules that are powered on successively and the data logic gate circuit.
具体实施中，在先上电的电源模块的输出端与数据逻辑门电路之间串接电阻R1，增加电阻R1，增大所在电路的阻值，从而改变电流的大小，以防止过流而烧毁后续电路的元件。In the specific implementation, the resistor R1 is connected in series between the output terminal of the power module that is powered on first and the data logic gate circuit, and the resistor R1 is increased to increase the resistance value of the circuit where it is located, thereby changing the magnitude of the current to prevent over-current and burning components of subsequent circuits.
实施中，电阻R1可以为千欧姆级电阻。In practice, the resistor R1 may be a kilo-ohm resistor.
具体实施中，为了得到更好的效果，可以采用千欧姆级的电阻作为电阻R1。In a specific implementation, in order to obtain a better effect, a kiloohm-level resistor can be used as the resistor R1.
实施中，多电源控制电路可以应用于电源按次序上电的单板机。In implementation, the multi-power supply control circuit can be applied to a single-board computer whose power supplies are powered on sequentially.
具体实施中，单板机上的关键元器件，如CPU(Center Processing Unit，中央处理单元)等，需要多个不同电压的电源模块供电，且要求这多个不同电压的电源模块按照规定的顺序依次上电，才能正常工作，所以，将本实用新型实施例提供的这种多电源控制电路应用于需要电源按次序上电的单板机，可以较好地控制多个电源模块的上电顺序，保证单板机的正常供电。In the specific implementation, the key components on the single board computer, such as CPU (Center Processing Unit, central processing unit), etc., need power supply from multiple power modules with different voltages, and these multiple power modules with different voltages are required to follow the prescribed order. It can work normally only when it is powered on. Therefore, applying the multi-power supply control circuit provided by the embodiment of the present invention to a single-board computer that requires power supplies to be powered on in sequence can better control the power-on sequence of multiple power supply modules. Ensure the normal power supply of the single board computer.
本实用新型实施例通过在需按时序上电启动的多个电源模块中先后上电的两个电源模块间设置数据逻辑门电路，连接该两个电源模块，可以严格控制这两个电源模块的上电先后顺序，以保证在供电的多个电源模块按预设时序上电供电，确保通过多个电源模块供电的电子设备正常工作。In the embodiment of the utility model, a data logic gate circuit is set between two power supply modules that need to be powered on in sequence to connect the two power supply modules, so that the power of the two power supply modules can be strictly controlled. The order of power-on is to ensure that multiple power supply modules are powered on and supply power according to the preset sequence, so as to ensure the normal operation of electronic equipment powered by multiple power supply modules.
以上实施例仅用以说明本实用新型的技术方案，而非对其进行限制。因此，在不背离本实用新型的精神及其实质的情况下，本领域技术人员可作出各种改变、替换和变型。很显然，但这些改变、替换和变型都应涵盖于本实用新型权利要求的保护范围之内。The above embodiments are only used to illustrate the technical solution of the present utility model, rather than to limit it. Therefore, those skilled in the art can make various changes, substitutions and modifications without departing from the spirit and essence of the present invention. Obviously, these changes, substitutions and modifications should all be covered within the protection scope of the claims of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420594738.0UCN204116848U (en) | 2014-10-15 | 2014-10-15 | A kind of many power control circuits |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420594738.0UCN204116848U (en) | 2014-10-15 | 2014-10-15 | A kind of many power control circuits |
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| CN204116848Utrue CN204116848U (en) | 2015-01-21 |
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| CN201420594738.0UExpired - LifetimeCN204116848U (en) | 2014-10-15 | 2014-10-15 | A kind of many power control circuits |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107991981A (en)* | 2017-12-05 | 2018-05-04 | 迈普通信技术股份有限公司 | A kind of service board and electronic equipment |
| CN114326506A (en)* | 2021-12-29 | 2022-04-12 | 深圳市华星光电半导体显示技术有限公司 | A power-on and power-off control circuit, control method and power supply system |
| CN114661130A (en)* | 2022-03-09 | 2022-06-24 | 湖南智领通信科技有限公司 | Power supply control circuit of CPU module and design method |
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107991981A (en)* | 2017-12-05 | 2018-05-04 | 迈普通信技术股份有限公司 | A kind of service board and electronic equipment |
| CN107991981B (en)* | 2017-12-05 | 2019-09-20 | 迈普通信技术股份有限公司 | A kind of service board and electronic equipment |
| CN114326506A (en)* | 2021-12-29 | 2022-04-12 | 深圳市华星光电半导体显示技术有限公司 | A power-on and power-off control circuit, control method and power supply system |
| CN114661130A (en)* | 2022-03-09 | 2022-06-24 | 湖南智领通信科技有限公司 | Power supply control circuit of CPU module and design method |
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