CN101281419A - Power Supply Module for Computer Devices - Google Patents

Abstract

The invention discloses a power supply module of a computer device. The power supply module comprises a power supply unit, a switching unit and a switch unit. The power supply unit is provided with a control end, a first power end and a second power end, wherein the control end receives a control signal, so that the power supply unit determines whether to supply working power to the computer system from the first power end and the second power end or not according to the control signal. The switching unit determines the state of the control signal according to whether the computer system is started. The switch unit is used for determining whether the computer system is started. Therefore, the problem of the loss of the electric quantity of the battery can be effectively solved, and the service time of the battery is prolonged.

Description

Translated fromChinese

电脑装置的电源供应模块Power Supply Module for Computer Devices

技术领域technical field

本发明是有关于一种电脑装置的电源供应模块，且特别是有关于一种可增加电脑于关机时电池待机时间的电源供应模块。The present invention relates to a power supply module of a computer device, and in particular to a power supply module capable of increasing battery standby time when the computer is turned off.

背景技术Background technique

笔记本电脑轻巧且携带方便，使得使用率日渐普及。为了达到便于携带及使用之目的，电池电量的提供即显得非常重要。因此，使用者一般在不使用的情况下，将笔记本电脑的电源(Power)关闭以避免耗费电池电量。然而，即使在电源关闭的情形下，由于电路回路特性仍无法完全切断电池供电。因此，无法避免笔记型电脑于电源关闭后停止电源持续耗电的情况发生。Laptops are lightweight and portable, making their use increasingly common. In order to achieve the purpose of portability and use, the provision of battery power is very important. Therefore, users generally turn off the power supply (Power) of the notebook computer to avoid consuming battery power when not in use. However, even when the power is turned off, it is still impossible to completely cut off the battery power supply due to the characteristics of the circuit loop. Therefore, it is unavoidable that the notebook computer stops power consumption and continues to consume power after the power is turned off.

当电池放入笔记本电脑，系统电源会持续不断的耗电。此时若是交流变压器(AC Adapter)没有插入主机，一般笔记本电脑只要一到两个月不使用，电池电量即被内部集成电路(Integrated Circuit，IC)消耗完毕。所以使用上会造成麻烦，并且衰减电池的使用寿命。When the battery is put into the notebook computer, the system power will be continuously drained. If the AC adapter (AC Adapter) is not plugged into the host computer at this time, as long as the notebook computer is not used for one to two months, the battery power will be completely consumed by the internal integrated circuit (IC). Therefore, it will cause trouble in use and reduce the service life of the battery.

图1绘示为现有电脑装置的方块图。请参照图1，此电脑装置100包括电源开关101、电池110、键盘控制器120和电脑系统130，其中电池110还包括控制端111、正电源端112和负电源端113。由图1可看出，电池110的正电源端112和负电源端113与电脑系统130连接，并形成一回路。即使在电脑系统130的电源关闭时，电池110还是持续供电。虽然电量的消耗没有在电脑系统130开机时消耗的快，但是电池110的电量仍持续不断地在消耗，直到电量被消耗完毕。因此，电脑系统130的使用时间缩短并且减少电池110的待机时间，造成使用上的不便利。FIG. 1 is a block diagram of a conventional computer device. Referring to FIG. 1 , thecomputer device 100 includes apower switch 101 , abattery 110 , akeyboard controller 120 and acomputer system 130 , wherein thebattery 110 also includes acontrol terminal 111 , a positivepower supply terminal 112 and a negativepower supply terminal 113 . It can be seen from FIG. 1 that thepositive power terminal 112 and thenegative power terminal 113 of thebattery 110 are connected to thecomputer system 130 and form a loop. Even when thecomputer system 130 is powered off, thebattery 110 continues to provide power. Although the power consumption is not as fast as when thecomputer system 130 is turned on, the power of thebattery 110 is still continuously consumed until the power is completely consumed. Therefore, the use time of thecomputer system 130 is shortened and the standby time of thebattery 110 is reduced, causing inconvenience in use.

发明内容Contents of the invention

本发明的目的就是在提供一种电脑装置的电源供应模块，可减少不必要的电量损耗，进而增加电脑于关机时电池的待机时间，并延长电池的使用寿命。The purpose of the present invention is to provide a power supply module for a computer device, which can reduce unnecessary power consumption, further increase the battery standby time when the computer is turned off, and prolong the service life of the battery.

本发明提出一种适用于电脑系统的电源供应模块。此电源供应模块包括电源单元、切换单元和开关单元。电源单元具有控制端、第一电源端和第二电源端，其中此控制端接收控制信号，使得电源单元依据上述控制信号而决定是否从第一电源端和第二电源端供应工作电源给电脑系统。切换单元依据电脑系统是否启动而决定控制信号的状态。开关单元耦接切换单元，用以决定电脑系统是否启动。当电脑系统在关闭的状态而开关单元被使能时，则触发信号被产生并且传送给电脑系统，以控制切换单元将控制信号切换为第一状态，使得电源单元供应工作电源。当电脑系统被控制关机时，则控制该切换单元将控制信号切换为第二状态，以使电源单元停止供应工作电源。The invention proposes a power supply module suitable for a computer system. The power supply module includes a power supply unit, a switch unit and a switch unit. The power supply unit has a control terminal, a first power supply terminal and a second power supply terminal, wherein the control terminal receives a control signal, so that the power supply unit decides whether to supply working power to the computer system from the first power supply terminal and the second power supply terminal according to the above control signal . The switching unit determines the state of the control signal according to whether the computer system is activated. The switch unit is coupled to the switch unit for determining whether the computer system is started. When the computer system is turned off and the switch unit is enabled, a trigger signal is generated and sent to the computer system to control the switch unit to switch the control signal to the first state, so that the power supply unit supplies working power. When the computer system is controlled to shut down, the switching unit is controlled to switch the control signal to the second state, so that the power supply unit stops supplying working power.

从另一观点来看，本发明再提出一种电脑装置，此电脑装置包括主系统、基本控制单元、电源单元、开关单元和电源控制单元。基本控制单元耦接至主系统。电源单元具有控制端、第一电源端和第二电源端，其中控制端接收控制信号，使得电源单元依据上述控制信号而决定是否从第一电源端和第二电源端供应工作电源给主系统。电源控制单元耦接基本控制单元，以依据基本控制单元的输出而决定控制信号的状态。开关单元耦接电源控制单元，用以决定是否启动主系统。当主系统在关闭的状态而开关单元被使能时，则基本控制单元接收到触发信号，导致基本控制单元控制电源控制单元将控制信号切换为第一状态，以使电源单元供应工作电源。当主系统被控制关机时，则基本控制单元控制电源控制单元将控制信号切换为第二状态，以使电源单元停止供应工作电源。From another point of view, the present invention further proposes a computer device, which includes a main system, a basic control unit, a power supply unit, a switch unit, and a power supply control unit. The basic control unit is coupled to the main system. The power supply unit has a control terminal, a first power supply terminal and a second power supply terminal, wherein the control terminal receives a control signal, so that the power supply unit decides whether to supply operating power to the main system from the first power supply terminal and the second power supply terminal according to the control signal. The power control unit is coupled to the basic control unit to determine the state of the control signal according to the output of the basic control unit. The switch unit is coupled to the power control unit for determining whether to start the main system. When the main system is in the off state and the switch unit is enabled, the basic control unit receives the trigger signal, causing the basic control unit to control the power control unit to switch the control signal to the first state, so that the power supply unit supplies working power. When the main system is shut down, the basic control unit controls the power control unit to switch the control signal to the second state, so that the power supply unit stops supplying working power.

本发明通过控制切换单元的控制信号的状态，而电源单元再根据此控制信号的状态决定是否提供工作电源。因此，可有效阻绝电池电量持续消耗，进而达到增加电池的待机时间以及延长电池的使用寿命。The present invention controls the state of the control signal of the switching unit, and the power supply unit decides whether to provide working power according to the state of the control signal. Therefore, the continuous consumption of battery power can be effectively prevented, thereby increasing the standby time of the battery and prolonging the service life of the battery.

为让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，并配合附图作详细说明如下。In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are exemplified below and described in detail with accompanying drawings.

附图说明Description of drawings

图1绘示为现有的电脑装置的方块图。FIG. 1 is a block diagram of a conventional computer device.

图2绘示为依照本发明的一较佳实施例的电脑装置的电路图。FIG. 2 is a circuit diagram of a computer device according to a preferred embodiment of the present invention.

具体实施方式Detailed ways

图2绘示为依照本发明一较佳实施例的电脑装置的电路图。请参照图2，本发明所提供的电脑装置200包括一电源供应模块210和一电脑系统260。其中，电源供应模块210耦接至电脑系统260，以供应其运行所需的电力。而电脑系统260可为一可携式电脑系统。FIG. 2 is a circuit diagram of a computer device according to a preferred embodiment of the present invention. Please refer to FIG. 2 , thecomputer device 200 provided by the present invention includes apower supply module 210 and a computer system 260 . Wherein, thepower supply module 210 is coupled to the computer system 260 to supply the power required for its operation. The computer system 260 can be a portable computer system.

在本实施例中，电脑单元260包括主系统261和基本控制单元262。其中，基本控制单元262例如是可携式电脑的键盘控制器，并且耦接至主系统261，以决定主系统261是否启动。In this embodiment, the computer unit 260 includes amain system 261 and abasic control unit 262 . Wherein, thebasic control unit 262 is, for example, a keyboard controller of a portable computer, and is coupled to themain system 261 to determine whether themain system 261 is activated.

另外，电源供应模块210包括电源单元220、开关单元230和电源控制单元270。其中，电源单元220具有控制端221、第一电源端222(例如为正电源端)和第二电源端223(例如为负电源端)，以提供电脑装置200内部电路所需的工作电源。此电源单元220的控制端221接收一控制信号CS，并且依据此控制信号CS的状态而决定是否从第一和第二电源端222、223供应工作电源给电脑系统260。In addition, thepower supply module 210 includes apower unit 220 , aswitch unit 230 and apower control unit 270 . Wherein, thepower supply unit 220 has acontrol terminal 221 , a first power supply terminal 222 (such as a positive power supply terminal) and a second power supply terminal 223 (such as a negative power supply terminal) to provide the working power required by the internal circuits of thecomputer device 200 . Thecontrol terminal 221 of thepower supply unit 220 receives a control signal CS, and determines whether to supply operating power to the computer system 260 from the first and secondpower supply terminals 222 , 223 according to the state of the control signal CS.

在本实施例中，开关单元230可为电脑的电源开关，其一端耦接至电源控制单元270，而其另一端耦接至接地端GND。In this embodiment, theswitch unit 230 can be a power switch of a computer, one end of which is coupled to thepower control unit 270 , and the other end is coupled to the ground terminal GND.

此外，电源控制单元270耦接至开关单元230和电源单元220和电脑系统260的基本控制单元262。藉此，电源控制单元270可以依据基本控制单元262的输出以及开关单元230是否被使能，而决定控制信号CS的状态，进而控制电源单元220是否供应工作电源。In addition, thepower control unit 270 is coupled to theswitch unit 230 and thepower unit 220 and thebasic control unit 262 of the computer system 260 . In this way, thepower control unit 270 can determine the state of the control signal CS according to the output of thebasic control unit 262 and whether theswitch unit 230 is enabled, and then control whether thepower supply unit 220 supplies working power.

请继续参照图2，电源控制单元270包括切换单元240、电容C直流对直流转换器250和电阻R。切换单元240耦接至基本控制单元262，并且依据主系统261是否启动而决定控制信号CS的状态。Please continue to refer to FIG. 2 , thepower control unit 270 includes aswitch unit 240 , a capacitor C DC-to-DC converter 250 and a resistor R. Theswitching unit 240 is coupled to thebasic control unit 262 and determines the state of the control signal CS according to whether themain system 261 is activated.

在本实施例中，电源控制单元270中的电容C可以作为稳压元件，而直流对直流转换器250则是将电源单元220的第一电源端222耦接至基本控制单元262，并通过电阻R耦接至开关单元230和切换单元240。切换单元240包括二极管D、第一晶体管Tr1、第一电阻R1和第二电阻R2。其中，二极管D可为一肖特基二极管(Schottky Diode)，其阴极端耦接至开关单元230，而其阳极端耦接至电源单元220，以限制电流流动的方向(也即避免直流对直流转换器250输出的电流回流至电源单元220)。第一晶体管Tr1可为一NPN双极性晶体管，其集极端耦接至二极管D的阳极端和电源单元220的控制端221，而其射极端则耦接至接地端GND，用以决定控制信号CS的状态。In this embodiment, the capacitor C in thepower control unit 270 can be used as a voltage stabilizing element, and the DC-to-DC converter 250 is to couple thefirst power terminal 222 of thepower supply unit 220 to thebasic control unit 262, and through a resistor R is coupled to theswitch unit 230 and theswitch unit 240 . Theswitching unit 240 includes a diode D, a first transistor Tr1, a first resistor R1 and a second resistor R2. Wherein, the diode D can be a Schottky diode (Schottky Diode), its cathode end is coupled to theswitch unit 230, and its anode end is coupled to thepower supply unit 220 to limit the direction of current flow (that is, to avoid DC to DC The current output by theconverter 250 flows back to the power unit 220). The first transistor Tr1 can be an NPN bipolar transistor, its collector terminal is coupled to the anode terminal of the diode D and thecontrol terminal 221 of thepower unit 220, and its emitter terminal is coupled to the ground terminal GND to determine the control signal CS status.

此外，第一电阻R1耦接于第一晶体管Tr1的基极端和基本控制单元262之间。第二电阻R2耦接于第一晶体管Tr1的基极端和其射极端之间。此两电阻R1、R2作为限流元件，以防止流至第一晶体管Tr1的电流过大，而使得第一晶体管Tr1损毁。In addition, the first resistor R1 is coupled between the base terminal of the first transistor Tr1 and thebasic control unit 262 . The second resistor R2 is coupled between the base terminal and the emitter terminal of the first transistor Tr1. The two resistors R1 and R2 are used as current limiting elements to prevent the first transistor Tr1 from being damaged due to excessive current flowing to the first transistor Tr1 .

在本实施例中，电源单元220包括电池模块225、第二晶体管Tr2、第三晶体管Tr3和微控制器226。其中，第二和第三晶体管Tr2、Tr3为NMOS晶体管。电池模块225分别耦接至微控制器226、电源单元220的第二电源端223和第二晶体管Tr2的第一源/漏极端，以供应电脑装置200所需的工作电源。第三晶体管Tr3的第一源/漏极端耦接至第二晶体管Tr2的第二源/漏极端，而其第二源/漏极端则耦接至第一电源端222。In this embodiment, thepower supply unit 220 includes abattery module 225 , a second transistor Tr2 , a third transistor Tr3 and amicrocontroller 226 . Wherein, the second and third transistors Tr2 and Tr3 are NMOS transistors. Thebattery module 225 is respectively coupled to themicrocontroller 226 , thesecond power terminal 223 of thepower unit 220 and the first source/drain terminal of the second transistor Tr2 to supply the working power required by thecomputer device 200 . The first source/drain terminal of the third transistor Tr3 is coupled to the second source/drain terminal of the second transistor Tr2 , and the second source/drain terminal thereof is coupled to thefirst power terminal 222 .

而微控制器226分别耦接至控制端221、第二晶体管Tr2和第三晶体管Tr3的栅极端，并依据控制信号CS的状态而决定第二和第三晶体管Tr2、Tr3是否导通。在主系统261关闭的情形下，控制信号CS为浮接(floating)状态，因此电池模块225不提供工作电源给电脑系统260。而当开关单元230被使能时，此时二极管D导通，使得控制信号CS转换为一接地电位。Themicrocontroller 226 is respectively coupled to thecontrol terminal 221 , the gate terminals of the second transistor Tr2 and the third transistor Tr3 , and determines whether the second and third transistors Tr2 and Tr3 are turned on according to the state of the control signal CS. When themain system 261 is turned off, the control signal CS is in a floating state, so thebattery module 225 does not provide working power to the computer system 260 . And when theswitch unit 230 is enabled, the diode D is turned on, so that the control signal CS is converted to a ground potential.

接着，当微控制器226接收此控制信号CS，则控制第二和第三晶体管Tr2、Tr3导通。由于第二和第三晶体管Tr2、Tr3导通，此时电池模块225输出一电压至直流对直流转换器250而产生一触发信号，并传送至基本控制单元262。Next, when themicrocontroller 226 receives the control signal CS, it controls the second and third transistors Tr2 and Tr3 to be turned on. Since the second and third transistors Tr2 and Tr3 are turned on, thebattery module 225 outputs a voltage to the DC-to-DC converter 250 to generate a trigger signal and transmits it to thebasic control unit 262 .

当基本控制单元262接收此触发信号后，会输出一开机信号(高电压电平)经由第一电阻R1传送至第一晶体管Tr1，使得第一晶体管Tr1导通。此时，开关单元230为失能状态，所以控制信号CS为浮接状态。由于第一晶体管Tr1导通，则切换单元240将控制信号CS再转换为接地电位，并且传送至微控制器226，使得第二和第三晶体管Tr2、Tr3再次导通。因此，电池模块225可供电给电脑系统260，并使主系统261可正常运行。在电池模块225供电的同时，基本控制单元262的电源则由电池模块225提供，以使得第一晶体管Tr1可持续导通，让电池模块225可继续提供工作电源。When thebasic control unit 262 receives the trigger signal, it will output a power-on signal (high voltage level) and send it to the first transistor Tr1 through the first resistor R1, so that the first transistor Tr1 is turned on. At this time, theswitch unit 230 is in a disabled state, so the control signal CS is in a floating state. Since the first transistor Tr1 is turned on, theswitching unit 240 converts the control signal CS to the ground potential again, and transmits it to themicrocontroller 226, so that the second and third transistors Tr2 and Tr3 are turned on again. Therefore, thebattery module 225 can supply power to the computer system 260 and enable themain system 261 to operate normally. While thebattery module 225 supplies power, thebasic control unit 262 is powered by thebattery module 225, so that the first transistor Tr1 is continuously turned on, so that thebattery module 225 can continue to provide working power.

另外，当主系统261例如被使用者通过作业系统控制关闭时，基本控制单元262会输出一关机信号(低电压电平)经由第一电阻R1传送至第一晶体管Tr1，使得第一晶体管Tr1截止。由于第一晶体管Tr1截止，在切换单元240中控制信号CS状态将转换为浮接状态，并传送至微控制器226。当微控制器226接收此控制信号CS后，则控制第二和第三晶体管Tr2、Tr3截止，使得电池模块225不再提供工作电源。因此，在主系统261关闭后，电池模块225不再提供工作电压，可减少不必要的电量消耗，进而可增加电池模块225的待机时间。In addition, when themain system 261 is shut down by the user via the operating system, for example, thebasic control unit 262 outputs a shutdown signal (low voltage level) to the first transistor Tr1 through the first resistor R1, so that the first transistor Tr1 is turned off. Since the first transistor Tr1 is turned off, the state of the control signal CS in theswitching unit 240 will be converted to a floating state and transmitted to themicrocontroller 226 . When themicrocontroller 226 receives the control signal CS, it controls the second and third transistors Tr2 and Tr3 to be turned off, so that thebattery module 225 no longer provides working power. Therefore, after themain system 261 is turned off, thebattery module 225 no longer provides the working voltage, which can reduce unnecessary power consumption and further increase the standby time of thebattery module 225 .

综上所述，由于本发明所提供的电源供应模块，可控制电池模块是否供电。当电脑系统开始运行时，则提供工作电源给电脑系统使用，而当电脑系统关机时，则完全切断电源的供应，并且使电池模块的电量不在继续消耗。因此，以本发明所提供的电源供应模块可有效地解决电池电量持续损耗的问题并增加电池使用的时间。To sum up, due to the power supply module provided by the present invention, it is possible to control whether the battery module supplies power. When the computer system starts to run, it provides working power for the computer system, and when the computer system is shut down, it completely cuts off the power supply, and keeps the power of the battery module from being consumed. Therefore, the power supply module provided by the present invention can effectively solve the problem of continuous power loss of the battery and increase the service time of the battery.

虽然本发明已以较佳实施例揭示如上，然其并非用以限定本发明，任何熟习此技艺者，在不脱离本发明的精神和范围内，当可作些许更动与润饰，因此本发明的保护范围当以权利要求所界定的为准。Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection should be defined by the claims.

Claims (18)

1. a power supply module is applicable to a computer system, comprising:

One power supply unit, have a control end, one first power end and a second source end, wherein this control end receives a control signal, makes that this power supply unit determines according to this control signal whether to supply a working power to this computer system from this first power end and this second source end;

Whether one switches the unit, start and determine the state of this control signal according to this computer system; And

One switch element couples this switch unit, whether starts in order to determine this computer system,

Wherein when this computer system in closing state and this switch element when being enabled, then a trigger pip is produced, and sends this computer system to, to control this switch unit this control signal is switched to one first state, make this power supply unit supply this working power

When this computer system Be Controlled shutdown, then control this switch unit this control signal is switched to one second state, so that this this working power of power supply unit stop supplies.

2. power supply module as claimed in claim 1 is characterized in that, also comprises:

One electric capacity, an end ground connection wherein, the other end couples this first power end; And

One direct current has an input end and an output terminal to direct current transducer, and wherein this input end couples this first power end, and this output terminal is coupled to this computer system; And

One resistance, in order to this direct current is coupled to this switch unit and this switch element to this output terminal of direct current transducer,

Wherein when this computer system in closing state, and this switch element is when being enabled, then this power supply unit discharges to direct current transducer by this direct current, to produce this trigger pip to this computer system.

3. power supply module as claimed in claim 1 is characterized in that, this switch unit comprises:

One diode, its cathode terminal is coupled to this switch element;

One the first transistor, its collector terminal couples the anode tap of this diode, and is coupled to the control end of this power supply unit, and its emitter-base bandgap grading end is ground connection then;

One first resistance is coupled to this computer system in order to the base terminal with this first transistor; And

One second resistance is coupled to its emitter-base bandgap grading end in order to the base terminal with this first transistor.

4. power supply module as claimed in claim 3 is characterized in that, this first transistor is the NPN bipolar transistor.

5. power supply module as claimed in claim 1 is characterized in that, this power supply unit comprises:

One battery module is in order to supply this working power;

One transistor seconds, its first source/drain electrode end couples this battery module;

One the 3rd transistor, its first source/drain electrode end couple the second source/drain electrode end of this transistor seconds, and the 3rd transistorized second source/drain electrode end then is coupled to this first power end; And

One microcontroller couples this control end, and couples this transistor seconds and the 3rd transistorized gate terminal, to determine the whether conducting of this transistor seconds and the 3rd transistor according to the state of this control signal.

6. power supply module as claimed in claim 5 is characterized in that, this transistor seconds and the 3rd transistor are nmos pass transistor.

7. power supply module as claimed in claim 1 is characterized in that, this of this control signal first state is an earthing potential.

8. power supply module as claimed in claim 1 is characterized in that, this of this control signal second state is a floating.

9. power supply module as claimed in claim 1 is characterized in that, this computer system is a portable computer system.

10. computer apparatus comprises:

One main system;

One basic control unit is coupled to this main system;

One power supply unit, have a control end, one first power end and a second source end, wherein this control end receives a control signal, makes that this power supply unit determines according to this control signal whether to supply a working power to this main system from this first power end and this second source end;

One power control unit couples this basic control unit, to determine the state of this control signal according to the output of this basic control unit; And

One switch element couples this power control unit, whether starts this main system in order to decision,

Wherein when this main system in closing state and this switch element when being enabled, then this basic control unit receives a trigger pip, cause this basic control unit to control this power control unit this control signal is switched to one first state, so that this power supply unit is supplied this working power

When this main system Be Controlled shutdown, then this basic control unit is controlled this power control unit this control signal is switched to one second state, so that this this working power of power supply unit stop supplies.

11. computer apparatus as claimed in claim 10 is characterized in that, this basic control unit is a keyboard controller.

12. computer apparatus as claimed in claim 10 is characterized in that, this power control unit comprises:

One electric capacity, an end ground connection wherein, the other end couples this first power end;

One direct current has an input end and an output terminal to direct current transducer, and wherein this input end couples this first power end, and this output terminal is coupled to this basic control unit;

One switches the unit, switches this control signal according to the output of this basic control unit and is this first state or this second state; And

One resistance, in order to this direct current is coupled to this switch unit and this switch element to this output terminal of direct current transducer,

Wherein when this main system in closing state, and this switch element is when being enabled, then this power supply unit discharges to direct current transducer by this direct current, gives this basic control unit to produce this trigger pip.

13. computer apparatus as claimed in claim 12 is characterized in that, this switch unit comprises:

One diode, its cathode terminal is coupled to this switch element;

One the first transistor, its collector terminal couples the anode tap of this diode, and is coupled to the control end of this power supply unit, and its emitter-base bandgap grading end is ground connection then;

One first resistance is coupled to this basic control unit in order to the base terminal with this first transistor; And

One second resistance is coupled to its emitter-base bandgap grading end in order to the base terminal with this first transistor.

14. computer apparatus as claimed in claim 13 is characterized in that, this first transistor is the NPN bipolar transistor

15. computer apparatus as claimed in claim 10 is characterized in that, this power supply unit comprises:

One battery module is in order to supply this working power;

One transistor seconds, its first source/drain electrode end couples this battery module;

One the 3rd transistor, its first source/drain electrode end couple the second source/drain electrode end of this transistor seconds, and the 3rd transistorized second source/drain electrode end then is coupled to this first power end; And

One microcontroller couples this control end, and couples this transistor seconds and the 3rd transistorized gate terminal, to determine the whether conducting of this transistor seconds and the 3rd transistor according to the state of this control signal.

16. computer apparatus as claimed in claim 15 is characterized in that, this transistor seconds and the 3rd transistor are nmos pass transistor.

17. computer apparatus as claimed in claim 10 is characterized in that, this of this control signal first state is an earthing potential.

18. computer apparatus as claimed in claim 1 is characterized in that, this of this control signal second state is a floating.

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