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Power-up starting power switch with controllable function

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CN104702258A
CN104702258A CN 201510126737 CN201510126737A CN104702258A CN 104702258 A CN104702258 A CN 104702258A CN 201510126737 CN201510126737 CN 201510126737 CN 201510126737 A CN201510126737 A CN 201510126737A CN 104702258 A CN104702258 A CN 104702258A
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power
up
controllable
starting
switch
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CN 201510126737
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Chinese (zh)
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CN104702258B (en )
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曲保章
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曲保章
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Abstract

The invention relates to a power-up starting power switch with a controllable function. The power-up starting power switch with the controllable function can effectively solve the problem of controllable power on and off of electric equipment. According to the technical scheme, the power-up starting power switch with the controllable function comprises a housing and a circuit board inside the housing, wherein the housing is provided with power input pins and a button S1; the circuit board is provided with a control circuit, which is composed of a single chip microcomputer, a field-effect tube and a DC/DC (direct current/direct current) module, the single chip microcomputer can control the input pins to output high electrical level or low electrical level according to input signals of the input pins. During application, an operator can simply connect the power input pins on the housing with the power supply output end of utilized equipment. The power-up starting power switch with the controllable function is novel and unique in structure, simple and reasonable in circuit, easy to produce and low in cost, achieves power-up automatic power ON, one-key power ON and OFF, low energy consumption, use convenience and high effects, and in a standby status, prolongs the service life of battery by 2 to 5 times, thereby being an innovation of power switches.

Description

具有可控功能的上电开机电源开关 Having a controllable power supply power switch function

技术领域 FIELD

[0001] 本发明涉及一种具有可控功能的上电开机电源开关,用于各种需要上电自动开机的电路或设备当中,具体应用在安全性较高的电子产品领域,如汽车电子领域。 [0001] The present invention relates to an electrical power supply having a controllable switch function which needs power for automatic power circuit or device, in particular the application of high safety electronic products, such as automotive electronics .

背景技术 Background technique

[0002]目前,在各种需要上电自动开机的设备中,通常采用的方法是将设备的电源入口直接接在供电电源输出端,这样电源一接通设备马上就可以上电工作,但这样做的弊端是不能实现在接通电源的情况下通过按键关机。 [0002] Currently, a variety of power required to automatically turn on the device, the method commonly used is to power the device directly connected to the inlet of the power supply output terminal, a power supply is turned on so that more electrical devices can work immediately, but this the drawback is done through the key can not be achieved in the case of shutdown of power. 还有一种方法可以实现通过按键实现开关机,但这种方法需要设备不停的采集开关机按键的状态,这就要求设备即使在关机状态下也要继续开关机按键的检测工作,需要一定的功耗,对于电池供电的设备来说非常不利,长期的话容易造成电池的亏电。 Another method may be implemented by a button switch implemented, but this method requires collection apparatus stop state switch button, which requires the device even in the off state of the switch detection must continue working machine buttons, a certain power consumption for battery-powered equipment is very negative, long-term, then easily lead to loss of battery power. 研制一种具有可控功能的上电开机电源开关,是本领域技术人员关心问题。 Powering on the development of a power switch with a controllable function, the skilled person concerns.

发明内容 SUMMARY

[0003] 针对上述情况,为克服现有技术之缺陷,本发明之目的就是提供一种具有可控功能的上电开机电源开关,可有效解决用电设备可控开关机的问题。 [0003] For the above, to overcome the drawbacks of the prior art, an object of the present invention is to provide a power-on boot having a controllable power switch function, electrical equipment can effectively solve the problem of the controllable switch.

[0004] 本发明解决的技术方案是,包括壳体和装在壳体内电路板,壳体上设置有电源输入引脚和按键SI,电路板上装有控制电路,控制电路包括单片机、场效应管和DC/DC模块,单片机的输入引脚分别与电阻R4的一端和电阻R5的一端相连,电阻R5的另一端接地,电阻R4的另一端分别与第一DC/DC模块Ul的输出引脚和二极管D5的正极相连,第一DC/DC模块Ul的接地引脚接地,第一DC/DC模块Ul输入引脚经按键SI分别与二极管Dl的负极、二极管D2的负极、有极电容Cl的正极、三极管Ql的集电极、电阻R3的一端和场效应管Q2的漏极相连,二极管Dl的正极与壳体上的电源输入引脚相连,二极管D2的正极分别与电阻Rl的一端、电阻R2的一端、场效应管Q3的源极和第二DC/DC模块U2的接地引脚相连,共端接地,电阻Rl的另一端分别接有极电容Cl的负极和三极管Ql的基极,电阻R2的另一端分别接三极 [0004] The present invention solves the technical solution, comprising a housing and a circuit board mounted within the housing, the housing is provided with a power button and the SI input pin, a circuit board with a control circuit, the control circuit comprises a microcontroller, and FET DC / DC module, the microcontroller input pins, respectively one end of a resistor R5 and one end of resistor R4 is connected to the other end of the resistor R5, and the other end of the resistor R4 with the first DC / DC module Ul and the diode output pins D5 is connected to the positive electrode, the first DC / DC module Ul ground pin grounded, the first DC / DC module Ul via the key input pin SI diode Dl anode, respectively, the cathode of the diode D2, capacitor Cl has a positive electrode, the collector of transistor Ql, the drain of FET Q2 and one end of the resistor R3 is connected to power input pin is connected to the positive electrode and the housing of the diode Dl, the diode D2, respectively, the positive electrode at one end of the resistor Rl one end of the resistor R2 the source of FET Q3 and the second DC / DC module U2 is connected to ground pins, were grounded, the other end of the resistor Rl are connected with the negative electrode of transistor Ql and the base electrode of the capacitor Cl, the other resistor R2 One end of the three-pole contact respectively, 管Ql的发射极、二极管D3的负极和场效应管Q3的栅极,场效应管Q3的漏极分别与电阻R3的另一端和场效应管Q2的栅极相连,场效应管Q2的源极与第二DC/DC模块U2的输入引脚相连,第二DC/DC模块U2的输出引脚与二极管D4的正极相连,二极管D4的负极分别接单片机的供电引脚和二极管D5的负极,单片机的输出引脚与二极管D3的正极相连,所述的单片机能够根据输入引脚的输入信号控制输入引脚输出高电平或低电平;使用时,将壳体上的电源输入引脚与使用设备供电电源输出端相连即可; Ql launch tube, a gate and a cathode of the diode D3 of MOSFET Q3, the drain of transistor Q3 is connected to the gate of each FET Q2 and the other end of the resistor R3, the source of the FET Q2 and a second DC / DC module U2 is connected to the input pin, and the pin diode is connected to the positive output of the second DC / DC module of U2 and D4, the cathode of diode D4 are connected to a supply pin and the diode D5 is negative the microcontroller, the microcontroller the positive output pin of the diode D3 is connected to the MCU according to an input control input signal input pin output pin high or low; when used, the use of the power input pin on the housing power supply device connected to the output terminal;

上电开机的过程为: Power-on boot process:

当壳体上的电源输入引脚处从断电状态接通电源时,电容Cl处于充电状态,控制三极管Ql导通,进而使场效应管Q3导通,场效应管Q3导通后,场效应管Q2栅极处于低电平状态,使场效应管Q2导通,接通电源,经第二DC/DC模块U2转换电压后为单片机供电,单片机上电后通过单片机的输出引脚Po输出高电平经二极管D3,使场效应管Q3、Q2继续维持导通状态,完成上电开机过程; When the power supply input pin on the housing is turned from power-off state, the capacitor Cl in a charged state, the control transistor Ql is turned on, thereby enabling the FET Q3 is turned on, the transistor Q3 is turned on, a field effect the gate of transistor Q2 is at the low level state, the FET Q2 is turned on, the power is turned on, after the second DC / DC voltage converter module to the microcontroller U2 powered by the microcontroller from high power output Po microcontroller output pins level by the diode D3, so that the FET Q3, Q2 continues to maintain the oN state, on the power on process is completed;

按键开关机的过程为: Process for the key switch machine:

开机时,按键SI被按下,第一DC/DC模块Ul工作,为单片机提供工作电源,单片机上电后通过单片机的输出引脚输出高电平经二极管D3,使场效应管Q3、Q2继续维持导通状态,完成上电开机过程; Boot, SI key is pressed, a first DC / DC module Ul work, as the supply of the microcontroller, the microcontroller is powered by a high level output pin of the microcontroller via a diode D3, so that the FET Q3, Q2 continues maintained in the oN state, on the power on process is completed;

关机时,按键SI被按下,第一DC/DC模块Ul工作,第一DC/DC模块Ul输出电压经电阻R4、R5分压后为单片机提供高电平信号,由单片机的输入引脚Pi送入单片机内部进行处理,单片机在确认关机信号有效后,通过输出引脚Po输出低电平信号,经二极管D3使场效应管Q3、Q2关断,完成按键关机过程。 Shutdown, SI key is pressed, a first DC / DC module Ul work, a first DC / DC module output voltage Ul via a resistor R4, R5 partial pressure of a high-level signal to the microcontroller, the microcontroller input pins Pi into the internal microcontroller for processing, after confirming the microcontroller active shutdown signal via the output pin Po outputs a low level signal, the diode D3 so that the FET Q3, Q2 is turned off, the completion button shutdown process.

[0005] 本发明结构新颖独特,电路简单合理,易生产,成本低,实现了上电自动打开电源、一键开关电源,能耗小,使用方便,效果好,在待机情况下可是电池寿命延长2到5倍,是电源开关上的创新。 [0005] The novel and unique structure of the present invention, the circuit is simple and reasonable, easy to produce, and low cost, to achieve the power automatically turns on, a small power supply switch key, power consumption, ease of use, good results, but the battery life in standby case 2 to 5 times, the power switch is innovative.

附图说明 BRIEF DESCRIPTION

[0006] 图1为本发明的电路原理图。 [0006] FIG. 1 is a schematic circuit diagram of the present invention.

具体实施方式 detailed description

[0007] 以下结合附图对本发明的具体实施方式作进一步详细说明。 [0007] The following specific embodiments in conjunction with the accompanying drawings of the present invention will be further described in detail.

[0008] 由图1给出,本发明包括壳体和装在壳体内电路板,所述的壳体为方形或圆形;壳体上设置有电源输入引脚和按键SI,电路板上装有控制电路,控制电路包括单片机、场效应管和DC/DC模块,单片机的输入引脚分别与电阻R4的一端和电阻R5的一端相连,电阻R5的另一端接地,电阻R4的另一端分别与第一DC/DC模块Ul的输出引脚和二极管D5的正极相连,第一DC/DC模块Ul的接地引脚接地,第一DC/DC模块Ul输入引脚经按键SI分别与二极管Dl的负极、二极管D2的负极、有极电容Cl的正极、三极管Ql的集电极、电阻R3的一端和场效应管Q2的漏极相连,二极管Dl的正极与壳体上的电源输入引脚相连,二极管D2的正极分别与电阻Rl的一端、电阻R2的一端、场效应管Q3的源极和第二DC/DC模块U2的接地引脚相连,共端接地,电阻Rl的另一端分别接有极电容Cl的负极和三极管Ql的基极,电阻R2 [0008] is given in Figure 1, the present invention includes a housing and a circuit board mounted within the housing, said housing is square or circular; upper case provided with a key and the SI power input pin, a circuit board with control circuit, the control circuit includes a microcontroller input pins, FET and DC / DC modules, microcontroller connected to one end of one end of resistor R4 and the resistor R5, respectively, the other end of the other end of the resistor R5 and the resistor R4 with the first positive DC / DC module Ul output pins and diode D5 is connected to a first ground pin grounded DC / DC module Ul, the first DC / DC module Ul via the key input pins, respectively SI cathode of the diode Dl, the diode D2 is a negative electrode, a positive electrode pole capacitor Cl is connected to the collector of the transistor Ql, the drain of FET Q2 and one end of resistor R3 is connected to the positive power input pin on the housing of the diode Dl, the anode of the diode D2 One end of the resistor Rl, respectively, the ground end of the resistor R2, the source of the FET Q3 and the second DC / DC module U2 connected to pins, were grounded, the other end of the resistor Rl are connected with the negative electrode of the capacitor Cl and the base of transistor Ql, resistor R2 另一端分别接三极管Ql的发射极、二极管D3的负极和场效应管Q3的栅极,场效应管Q3的漏极分别与电阻R3的另一端和场效应管Q2的栅极相连,场效应管Q2的源极与第二DC/DC模块U2的输入引脚相连,第二DC/DC模块U2的输出引脚与二极管D4的正极相连,二极管D4的负极分别接单片机的供电引脚和二极管D5的负极,单片机的输出引脚与二极管D3的正极相连,所述的单片机能够根据输入引脚的输入信号控制输入引脚输出高电平或低电平;使用时,将壳体上的电源输入引脚与使用设备供电电源输出端相连即可; The other end respectively connected with the emitter of transistor Ql, the gate of the diode D3 and the FET Q3 and a negative electrode, the drain of transistor Q3 and the gate of each FET Q2 and the other end of the resistor R3 is connected to FET Q2 is a source electrode connected to the second DC / DC module input pins of U2, the diode is connected to the positive output pin of the second DC / DC module of U2 and D4, the cathode of diode D4 are connected to the microcontroller and the supply pins diode D5 the negative electrode, the positive output pin of the diode D3 is connected to the microcontroller, the microcontroller control input according to an input signal input pin of the pin high or low; use, the power input on the housing using the device power supply pin is connected to an output terminal;

上电开机的过程为: Power-on boot process:

当壳体上的电源输入引脚处从断电状态接通电源时,电容Cl处于充电状态,控制三极管Ql导通,进而使场效应管Q3导通,场效应管Q3导通后,场效应管Q2栅极处于低电平状态,使场效应管Q2导通,接通电源,经第二DC/DC模块U2转换电压后为单片机供电,单片机上电后通过单片机的输出引脚Po输出高电平经二极管D3,使场效应管Q3、Q2继续维持导通状态,完成上电开机过程; 按键开关机的过程为: When the power supply input pin on the housing is turned from power-off state, the capacitor Cl in a charged state, the control transistor Ql is turned on, thereby enabling the FET Q3 is turned on, the transistor Q3 is turned on, a field effect the gate of transistor Q2 is at the low level state, the FET Q2 is turned on, the power is turned on, after the second DC / DC voltage converter module to the microcontroller U2 powered by the microcontroller from high power output Po microcontroller output pins level by the diode D3, so that the FET Q3, Q2 continues to maintain the on state, power is turned on to complete the process; button switch process is:

开机时,按键SI被按下,第一DC/DC模块Ul工作,为单片机提供工作电源,单片机上电后通过单片机的输出引脚输出高电平经二极管D3,使场效应管Q3、Q2继续维持导通状态,完成上电开机过程; Boot, SI key is pressed, a first DC / DC module Ul work, as the supply of the microcontroller, the microcontroller is powered by a high level output pin of the microcontroller via a diode D3, so that the FET Q3, Q2 continues maintained in the oN state, on the power on process is completed;

关机时,按键SI被按下,第一DC/DC模块Ul工作,第一DC/DC模块Ul输出电压经电阻R4、R5分压后为单片机提供高电平信号,由单片机的输入引脚Pi送入单片机内部进行处理,单片机在确认关机信号有效后,通过输出引脚Po输出低电平信号,经二极管D3使场效应管Q3、Q2关断,完成按键关机过程。 Shutdown, SI key is pressed, a first DC / DC module Ul work, a first DC / DC module output voltage Ul via a resistor R4, R5 partial pressure of a high-level signal to the microcontroller, the microcontroller input pins Pi into the internal microcontroller for processing, after confirming the microcontroller active shutdown signal via the output pin Po outputs a low level signal, the diode D3 so that the FET Q3, Q2 is turned off, the completion button shutdown process.

[0009] 所述的电容Cl、电阻R1、R2、R3,三极管Ql、场效应管Q2、Q3构成上电启动电路,单片机和二极管D3构成电源控制电路,第一DC/DC模块Ul和第二DC/DC模块U2用于电源转换,二极管D4、D5作为两DC/DC模块之间的隔离二极管,电阻R4、R5用于按键检测,当壳体上的电源输入引脚处从断电状态接通电源时,电容Cl处于充电状态,控制三极管Ql导通,进而使场效应管Q3导通,场效应管Q3导通后,场效应管Q2栅极处于低电平状态,使场效应管Q2导通,接通电源,经第二DC/DC模块U2转换电压后为单片机供电,单片机上电后通过单片机的输出引脚Po输出高电平经二极管D3,使场效应管Q3、Q2继续维持导通状态,完成上电开机过程;利用二极管D1、D2的单向导通作用实现输入电源防反接功能; [0009] The capacitor Cl, a resistor R1, R2, R3, transistor Ql,, FET Q2, Q3 constituting the electric starting circuit, constituting the diode D3, and the microcontroller power supply control circuit, a first DC / DC module and a second Ul DC / DC power converter module for U2, the diode D4, D5 as a blocking diode, a resistor R4 between the two DC / DC module, R5 keys for detecting, when the power at the input pins connected to the housing from a power off state when power on, the capacitor Cl in a charged state, the control transistor Ql is turned on, thereby enabling the FET Q3 is turned on, the transistor Q3 is turned on, the gate of the FET Q2 in the low level state, the FET Q2 turned on, the power is turned on, after the second DC / DC voltage converter module to the microcontroller U2 powered by the electrical output pin on the microcontroller output high Po microcontroller via diode D3, so that the FET Q3, Q2 continuation conductive state, to complete the process of powering on; the diodes D1, D2 is acting unidirectional conductive anti-reverse function for input power;

所述的按键SI为市售的按键开关,所述的按键开关常态处于初始自由状态的位置上,只是在有要求时才在外力作用下转换到第二种状态(位置),当外力一旦除去,由于弹簧的作用,开关就又回到初始位置,即按键SI按下时接通,松开时断开; The position of a commercially available SI key key switch, the key switch is in the normal state on the initial free state, but only when there is conversion requires an external force to the second state (position), when the external force is removed once due to the action of the spring, to switch back to the initial position, i.e., when the key is pressed SI turned OFF when released;

所述能够根据输入引脚的输入信号控制输入引脚输出高电平或低电平,从而与二极管D3构成电源控制电路,该单片机为市售产品,如型号为C8051F040、C8051F410、AT8052或W77E58/516等等诸多型号的单片均能用于本发明;通过单片机还可以实时监测本用电设备的其他应用电路的工作情况,若电路出现故障,电源将通过单片机输出引脚Po输出低电平信号,经二极管D3使场效应管Q3、Q2关断,实现自动关闭电源功能; The control input signal according to an input pin high or low input pin, so as to constitute the power control circuit and the diode D3, the microcontroller is a commercially available product, such as model C8051F040, C8051F410, AT8052 or W77E58 / 516, and many types can be used according to the present invention is monolithic; by the microcontroller can also be real-time monitoring the operation of other electrical equipment of the present application circuit, if the circuit fails, the power output by the microcontroller output pin low Po signal, the diode D3 so that the FET Q3, Q2 is turned off, the automatic power-off function;

所述的第一DC/DC模块和第二DC/DC模块U2为市售的DC/DC转换器,能够将一个固定的直流电压变换为可变的直流电压,又称为直流斩波器。 The first DC / DC module and the second DC / DC module U2 are commercially available DC / DC converter, it can be a fixed DC voltage into a variable DC voltage, also known as DC chopper.

[0010] 本发明在电路中设置两路DC/DC模块构成的转换电路,一路负责按键开关机,一路负责上电开机。 [0010] The present invention provide a switching circuit two-way DC / DC modules in the circuit, is responsible for the way key switch, is responsible for the way the power is turned on. 本发明的电源输入引脚与使用设备供电电源输出端相连,上电后上电启动电路使电源在一定时间内导通给单片机供电,单片机启动后通过输出引脚控制电源持续导通。 And using the device power input pin power supply is connected to the output terminal according to the present invention, after the power enable circuit power supply is turned on within a certain period of time power supply to the microcontroller, the microcontroller continuously turned on by the start control power output pin. 单片机输入引脚检测开关状态,有按键按下,则根据按键按下情况判断是否执行电源切断动作。 MCU input pin state detection switch, a button is pressed, the operation determines whether power-off button is pressed according to the situation. 关机后还可通过按键按下状态进行正常开机。 May also be performed by normal boot key pressed state after the shutdown.

[0011] 由上述情况可以清楚的看出,本发明具有以下功能:1、上电自动打开电源;2、一键开关电源;3、故障自动关闭电源;4、彻底关闭电源,电路自身不耗电;5、具有输入电源防反接功能。 [0011] can be clearly seen from the above, the present invention has the following features: 1, the power automatically turns; 2, a power supply key switch; 3, power failure automatically shut down; 4, completely turn off the power circuit itself does not consume electricity; 5 having an input power anti-reverse function. 本发明结构新颖独特,电路简单合理,易生产,成本低,实现了上电自动打开电源、一键开关电源,能耗小,使用方便,效果好,在待机情况下可是电池寿命延长2到5倍,是电源开关上的创新,有良好的社会和经济效益。 The present invention is novel and unique structure, the circuit is simple and reasonable, easy to produce, and low cost, to achieve the power automatically turns on, a small power supply switch key, power consumption, ease of use, good results, but the battery life at 2-5 Standby times, innovation is the power switch, there is a good social and economic benefits.

[0012] 申请人要指出的是,本申请中所有的各部件均为现有市售产品(公知技术),本发明创新之处在于将它们科学的组合起来,构成具有创新性的上电开机电源开关,本申请上述指出的仅仅是一种实施例,并不是用于限制本申请的保护范围,凡是用等同或等同替代手段所做出与本申请技术方案本质上相同的技术方案均属于本申请的保护范围。 [0012] Applicant to be noted that, in the present application all the components are conventional commercially available products (known art), the present invention is that the innovation scientific combination thereof, constituting the electrical power innovative the power switch, the present application noted above is merely one embodiment, not intended to limit the scope of the present application, usually by means of equivalent or equivalents made on the same technical solutions of the present application belong to the technical solution of the present the scope of application.

Claims (3)

1.一种具有可控功能的上电开机电源开关,包括壳体和装在壳体内电路板,壳体上设置有电源输入引脚和按键Si,其特征在于,电路板上装有控制电路,控制电路包括单片机、场效应管和DC/DC模块,单片机的输入引脚分别与电阻R4的一端和电阻R5的一端相连,电阻R5的另一端接地,电阻R4的另一端分别与第一DC/DC模块Ul的输出引脚和二极管D5的正极相连,第一DC/DC模块Ul的接地引脚接地,第一DC/DC模块Ul输入引脚经按键SI分别与二极管Dl的负极、二极管D2的负极、有极电容Cl的正极、三极管Ql的集电极、电阻R3的一端和场效应管Q2的漏极相连,二极管Dl的正极与壳体上的电源输入引脚相连,二极管D2的正极分别与电阻Rl的一端、电阻R2的一端、场效应管Q3的源极和第二DC/DC模块U2的接地引脚相连,共端接地,电阻Rl的另一端分别接有极电容Cl的负极和三极管Ql的基极,电 A function having controlled powering on the power switch, comprising a housing and a circuit board mounted within the housing, the housing is provided with a power input pin and key Si, wherein a circuit board with a control circuit for controlling microcontroller circuit comprises a FET and DC / DC modules, the microcontroller input pins, respectively one end of a resistor R5 and one end of resistor R4 is connected to the other end of the resistor R5, the other end of the resistor R4 are respectively the first DC / DC and the positive output pin of the module Ul diode D5 is connected to a first ground pin grounded DC / DC module Ul, the first DC / DC module Ul SI respectively via the key input pin diode Dl anode and cathode of diode D2 , there is the positive electrode of the capacitor Cl, a collector, the drain of FET Q2 and one end of resistor R3 is connected to the transistor Ql, connected to the positive power input pin on the housing of the diode Dl, the cathode of the diode D2 and the resistor, respectively Rl source end grounded, and one end of the resistor R2, transistor Q3 and a second DC / DC module connected to pins of U2, were grounded, the other end of the resistor Rl are connected with the negative electrode and the capacitor Cl of the transistor Ql base, power R2的另一端分别接三极管Ql的发射极、二极管D3的负极和场效应管Q3的栅极,场效应管Q3的漏极分别与电阻R3的另一端和场效应管Q2的栅极相连,场效应管Q2的源极与第二DC/DC模块U2的输入引脚相连,第二DC/DC模块U2的输出引脚与二极管D4的正极相连,二极管D4的负极分别接单片机的供电引脚和二极管D5的负极,单片机的输出引脚与二极管D3的正极相连,所述的单片机能够根据输入引脚的输入信号控制输入引脚输出高电平或低电平;使用时,将壳体上的电源输入引脚与使用设备供电电源输出端相连即可; 上电开机的过程为: 当壳体上的电源输入引脚处从断电状态接通电源时,电容Cl处于充电状态,控制三极管Ql导通,进而使场效应管Q3导通,场效应管Q3导通后,场效应管Q2栅极处于低电平状态,使场效应管Q2导通,接通电源,经第二DC/DC模块U2转换电压后为单片 The other end of the drain of the transistor Ql R2 are respectively connected to the emitter, the gate of the FET Q3 and the anode of the diode D3, the transistor Q3 and the gate of each FET Q2 and the other end of the resistor R3 is connected to the field the source effect transistor Q2 and the second DC / DC module U2 is connected to the input pin, an output pin is connected to the positive electrode of the diode D4 and second DC / DC module U2, the cathode of the diode D4 are respectively connected with the microcontroller and the supply pins the cathode of the diode D5, the positive output pin of the diode D3 is connected to the microcontroller, the microcontroller can be high or low level in accordance with the control input signal input pin output pin; when used, the upper housing power supply input pin is connected to the power output terminal to use the device; powering up the process as follows: when the power supply at the power input pin from the housing is turned-off state, the capacitor Cl in a charged state, the control transistor Ql turned on, thereby enabling the FET Q3 is turned on, the transistor Q3 is turned on, the gate of the FET Q2 in the low level state, the FET Q2 is turned on, the power is turned on, the second DC / DC after converting the voltage U2 as a monolithic module 供电,单片机上电后通过单片机的输出引脚Po输出高电平经二极管D3,使场效应管Q3、Q2继续维持导通状态,完成上电开机过程; 按键开关机的过程为: 开机时,按键SI被按下,第一DC/DC模块Ul工作,为单片机提供工作电源,单片机上电后通过单片机的输出引脚输出高电平经二极管D3,使场效应管Q3、Q2继续维持导通状态,完成上电开机过程; 关机时,按键SI被按下,第一DC/DC模块Ul工作,第一DC/DC模块Ul输出电压经电阻R4、R5分压后为单片机提供高电平信号,由单片机的输入引脚Pi送入单片机内部进行处理,单片机在确认关机信号有效后,通过输出引脚Po输出低电平信号,经二极管D3使场效应管Q3、Q2关断,完成按键关机过程。 Power supply, power after the microcontroller outputs a high level through the output pin via a diode D3 Po microcontroller, so that the FET Q3, Q2 continues to maintain the on state, power is turned on to complete the process; button switch process is: boot, SI key is pressed, a first DC / DC module Ul work, as the supply of the microcontroller, the microcontroller is powered by a high level output pin of the microcontroller via a diode D3, so that the FET Q3, Q2 is turned on to continue to maintain state, power to complete the boot process; shutdown, SI key is pressed, a first DC / DC module Ul work, a first DC / DC module output voltage Ul via a resistor R4, R5 partial pressure of a high-level signal to the microcontroller , into the interior of the microcontroller MCU input pin Pi is processed, after confirming the microcontroller active shutdown signal via the output pin Po outputs a low level signal, the diode D3 so that the FET Q3, Q2 is turned off, the shutdown completion button process.
2.根据权利要求1所述的具有可控功能的上电开机电源开关,其特征在于,所述的电容Cl、电阻Rl、R2、R3,三极管Q1、场效应管Q2、Q3构成上电启动电路,单片机和二极管D3构成电源控制电路,第一DC/DC模块Ul和第二DC/DC模块U2用于电源转换,二极管D4、D5作为两DC/DC模块之间的隔离二极管,电阻R4、R5用于按键检测,当壳体上的电源输入引脚处从断电状态接通电源时,电容Cl处于充电状态,控制三极管Ql导通,进而使场效应管Q3导通,场效应管Q3导通后,场效应管Q2栅极处于低电平状态,使场效应管Q2导通,接通电源,经第二DC/DC模块U2转换电压后为单片机供电,单片机上电后通过单片机的输出引脚Po输出高电平经二极管D3,使场效应管Q3、Q2继续维持导通状态,完成上电开机过程。 The power is turned on the power switch with a controllable function according to claim 1, wherein said capacitor Cl, a resistor Rl, R2, R3, transistor Q1, FET Q2, Q3 constituting the electric start circuit, a microcontroller and power supply control circuit constituting the diode D3, a first DC / DC module Ul and a second DC / DC power converter module for U2, the diode D4, D5 as a blocking diode, a resistor R4 between the two DC / DC module, R5 keys for detecting, when the power supply input pin on the housing from a power off state is turned on, the capacitor Cl in a charged state, the control transistor Ql is turned on, thereby enabling the FET Q3 is turned on, transistor Q3 after conducting, the gate of the FET Q2 in the low level state, the FET Q2 is turned on, the power is turned on, after U2 converted voltage of the second DC / DC power supply module SCM, the SCM electricity through microcontroller Po output pin outputs a high level via the diode D3, so that the FET Q3, Q2 continues to maintain the on state, power-on boot process is completed.
3.根据权利要求1所述的具有可控功能的上电开机电源开关,其特征在于,所述的壳体为方形或圆形。 The power is turned on the power switch with a controllable function according to claim 1, wherein said housing is square or circular.
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