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Shutdown control circuit and electronic product with same

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Publication number
CN104731305A
CN104731305A CN 201510156733 CN201510156733A CN104731305A CN 104731305 A CN104731305 A CN 104731305A CN 201510156733 CN201510156733 CN 201510156733 CN 201510156733 A CN201510156733 A CN 201510156733A CN 104731305 A CN104731305 A CN 104731305A
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circuit
shutdown
key
system
power
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CN 201510156733
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Chinese (zh)
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CN104731305B (en )
Inventor
林大鹏
杜洋
宋超
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青岛歌尔声学科技有限公司
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Abstract

The invention discloses a shutdown control circuit and an electronic product with the same. The shutdown control circuit is provided with a power source management circuit, a system main circuit, a specific function circuit, a startup key and a complete shutdown key. The specific function circuit needs to run continuously when the electronic product is shut down. One end of the startup key is communicated with the positive electrode of a battery, and the other end of the startup key is communicated with the enabled end of a first power source conversion chip. When the startup key is pressed down, the first power source conversion chip is controlled to be enabled to supply power to the system main circuit. One end of the complete shutdown key is communicated with system voltage, and the other end of the complete shutdown key is communicated with the system main circuit. When detecting that the complete shutdown key is pressed down, the system main circuit outputs a complete shutdown signal to control a second power source conversion chip to stop running, the power supplied to the specific function circuit is cut off, and the system main circuit is controlled to be shut down. By designing the whole system shutdown mode, electric quantity consumption of a battery in the electronic product is reduced to the maximum limit, and the storage time of the charged electronic product in a storeroom is prolonged.

Description

关机控制电路及具有所述关机控制电路的电子产品 Shut off the control circuit and a control circuit having electronic products

技术领域 FIELD

[0001] 本发明涉及一种用于控制电子产品关机的电路结构设计,具体地说,是涉及一种可支持主系统关机和全系统关机两种模式的关机控制电路以及采用这种关机控制电路设计的电子产品。 [0001] The present invention relates to a circuit arrangement for the design of electronic products off control, and more particularly, to a system that supports the main control circuit shutdown and shutdown modes of the system-wide shutdown and shutdown control circuit using this design of electronic products.

背景技术 Background technique

[0002] 随着科技的进步,穿戴类电子产品被越来越多的消费者所青睐并广泛使用,其所能实现的功能也日益增多。 [0002] As technology advances, dressed electronics are favored by more and more consumers and widely used, it can realize the function are increasing. 由于目前的穿戴类电子产品,其尺寸普遍较小,重量很轻,这就决定了适合这类电子产品使用的电池,其在体积和电池容量上都普遍较小。 Since the current wearable electronics, is generally small in size, light in weight, which determines the cell for use in such electronic products, which are generally small in size and battery capacity.

[0003] 为了使消费者在初次拿到该类电子产品时能够直接进行开机体验,生产厂商在产品出厂前都会给产品内部的电池预充少部分电量。 [0003] In order for consumers to be able to boot up when experience directly for the first time to get this kind of electronic products, manufacturers in the factory before the products to the internal battery will charge a small part of the pre-charge. 由于现在的很多穿戴类电子产品具有显示时间的功能,为了保证计时的准确性,目前生产厂商在进行电路设计时,都是设计产品内部的实时时钟芯片始终保持上电运行模式,即使是在电子产品处于关机状态仍持续工作,由此便导致了产品电量的持续消耗。 Now that's a lot of wearable electronics has a function to display the time, in order to ensure the accuracy of the timing of the current manufacturers during the circuit design, interior design products are always on-chip real-time clock power mode of operation, even in the electronic products continued to work in a shutdown state, which will lead to a sustained electricity consumption of the product.

[0004] 由于电子产品在出厂后,可能会在库房中存放很长一段时间后才能到达消费者的手中,若库房存放的时间过长,会出现电子产品的电池电量消耗殆尽,无法开机的问题,从而导致消费者在购买时因无法正常开机体验而降低其购买的意愿。 [0004] As electronic products in the factory, may be after a long period of time stored in the warehouse to reach the hands of consumers, if the warehouse stored for too long, there will be electronic products, battery power exhausted, unable to boot problem, causing consumers to experience due to not boot properly and reduce their willingness to buy at the time of purchase.

[0005] 因此,如何尽量减小穿戴类电子产品的关机损耗,确保在其从出厂到消费者手中的这段时间内电池的电量消耗最低,即便是在库房中保存了很长时间,在消费者初次拿到时也能保证其可以正常开机完成初次体验,是目前很多采用电池供电的电子产品普遍面临的一个问题。 [0005] Therefore, how to minimize losses worn off electronics products, to ensure the lowest consumption in its this time from the factory to the hands of the consumer battery power, save for a long time even in the warehouse, in the consumer the first time you get a person can guarantee that you can boot normally completed first experience, it is currently a problem a lot of battery-powered electronic products generally faced.

发明内容 SUMMARY

[0006] 本发明的目的在于提供一种支持主系统关机和全系统关机两种模式的关机控制电路,通过控制电子产品在出厂时整个系统全部关机,由此可以最大限度地降低电子产品内部电池的电量消耗,延长电子产品充电后的库房存放时间。 [0006] The object of the present invention is to provide a support for the main system shutdown and shutdown control circuit two modes of system-wide shutdown, by controlling all the system shut down electronics at the factory, thereby minimizing internal battery Electronics power consumption and extend the Treasury after the electronic products charge storage time.

[0007] 为解决上述技术问题,本发明采用以下技术方案予以实现: [0007] To solve the above problems, the present invention employs the following technical solutions to be achieved:

一种关机控制电路,应用在电池供电的电子产品中,在所述电子产品中设置有电源管理电路、系统主电路和在电子产品使用关机时要求持续运行的特定功能电路;在所述电源管理电路中设置有为系统主电路供电的第一电源转换芯片和为所述特定功能电路供电的第二电源转换芯片;在所述电子产品上设置有开机按键和全关机按键,所述开机按键的一端连通电池的正极,另一端连通第一电源转换芯片的使能端,在开机按键按下时,控制第一电源转换芯片使能,将电池电压转换成系统电压,为系统主电路供电;所述全关机按键的一端连通所述的系统电压,另一端连通系统主电路,所述系统主电路在检测到全关机按键按下时,输出全关机信号控制第二电源转换芯片停止运行,切断所述特定功能电路的供电,并控制系统主电路关机。 One kind of shutdown control circuit used in battery-powered electronic products, provided certain functional circuits of a power management circuit, the main circuit and durable operation when the electronic products off at the electronic products; power management in the circuit provided promising first main circuit power supply and the power conversion chip to the specific function of the second power converter circuit chip; provided on the electronic products are full off button and power button, the power button One end of the positive electrode cell communication, and the other end communicates with the first power conversion chip enable terminal, when the power button is pressed, the control of the first power conversion chip enable, converting the battery voltage to the system voltage, system main circuit power supply; the One end of the whole communication with said off button of the system voltage, and the other end communicating the main circuit, the main circuit when detecting the full off button is pressed, the shutdown signal to control the second output of the full chip power converter stopped, the cutting said power supply circuit specific function, and controls the main circuit shutdown.

[0008] 进一步的,在所述系统主电路中设置有主控芯片和与其连接的外围功能电路,所述全关机按键连接在电池与所述主控芯片之间;在电子产品处于开机运行状态时,若主控芯片检测到所述全关机按键被按下,则首先输出全关机信号控制所述特定功能电路关闭,其次控制所述的外围功能电路关机,最后控制第一电源转换芯片停止运行,切断系统主电路的供电,实现全系统关机;在电子产品处于使用关机状态时,若需要控制电子产品转入全系统关机模式,则可以同时按下所述的开机按键和全关机按键,所述第一电源转换芯片在开机按键按下时使能运行,为主控芯片供电;所述主控芯片在上电运行后首先检测全关机按键是否按下,若未被按下,则判定进入开机模式,输出控制信号维持第一电源转换芯片使能运行,并控制系统主电路开机运行;若全关机 [0008] Further, the system is provided with a main circuit and a control chip peripheral function circuit connected thereto, the whole off button connected between the battery and the master chip; electronic product is switched on state , the master chip if the detected full off button is pressed, the first shutdown signal to control the output of the full specific function circuit closes, followed by the peripheral control circuitry of the shutdown function, the control of the first power conversion chip finally stopped , cut off the power supply of the main circuit system, system-wide shutdown; used when the electronic product is turned off, if desired, the control electronics into a system-wide shutdown mode, you can press the power button and the full-off button at the same time, the said first power conversion chip so that the start button is pressed at the run, power for the master chip; the control chip running after power is first detected whether a full off button is pressed, if not pressed, it is determined to enter the startup mode, the output of the first control signal is maintained so that power conversion chip can run, and a main circuit power control system operation; full off if 按键被按下,则判定进入全关机模式,不启动所述的外围功能电路,而是直接输出全关机信号控制所述的第二电源转换芯片和特定功能电路停止运行,实现全系统关机。 Button is pressed, it is determined to enter the full off mode, said peripheral function circuit is not activated, but directly off the second output of the full power of the control signal conversion chip and the particular functional circuit stops operating, system-wide shutdown.

[0009] 为了保证主控芯片在完成必须的工作前不会断电,本发明在所述第一电源转换芯片的使能端与系统地之间连接有储能电容和放电电阻,在同时按下开机按键和全关机按键控制电子产品在使用关机状态下全关机时,所述储能电容在开机按键按下的期间内接收电池输出的电能并进行存储,在开机按键断开时,通过放电电阻放电,以延迟第一电源转换芯片关闭的时间,从而为主控芯片预留出足够的运行时间,以保证主控芯片能够完成全关机信号的输出以及数据保存等相关工作。 [0009] In order to ensure that the master chip must be completed before the power-off does not work, the present invention is in the first power conversion chip enable terminal of the storage capacitor has a discharge resistance between the system and connected, while by when the all-off button and power button control electronic products using full shut off state, the power of the battery energy storage capacitor receiving the output of the power button is pressed during the storage and, when the power button is disconnected, by the discharge resistance discharge, a time delay of the first power conversion chip off, reserved for the master chip so that sufficient run time to ensure the completion of the main chip and outputting data storage and other related work full shutdown signal.

[0010] 为了保证在控制电子产品开机运行时,即便开机按键断开,系统主电路也能有持续的电力供应,本发明将所述第一电源转换芯片的使能端连接一双二极管器件的阴极,所述双二极管器件的阴极对接,两个阳极分别与所述的开机按键和主控芯片一一对应连接;所述主控芯片在需要控制整机开机运行时,输出开机信号通过所述的双二极管器件传输至第一电源转换芯片的使能端,控制第一电源转换芯片持续使能运行,以持续为系统主电路供电。 [0010] In order to ensure that the control electronics switched on, even if the power button is turned off, the main circuit can also have a continuous supply of electricity, the present invention is connected to the cathode of the first diode device of one pair of power conversion chip enable terminal , abutting the cathode dual diode device, two anodes are connected to the power button and the one-chip master; the master chip control is needed to run the machine power, said output power signal double diode device transmitted to the first power conversion chip enable terminal, a first power conversion control chip enable continuous operation, the system continuing to supply the main circuit.

[0011] 作为控制所述电子产品进入使用关机模式的一种优选设计方案,本发明在所述电子产品上设置触摸屏,在电子产品处于开机运行状态时,通过操作触摸屏调取关机界面,通过操作关机界面仅控制所述的系统主电路关机,实现电子产品的使用关机。 [0011] As a preferred embodiment of the control electronics used to enter the shutdown mode, the present invention is a touch screen on the electronic product when the electronic product is switched operating state, by operating the touch screen interface is retrieved off by operating shutdown interface control only the main circuit of the system shutdown, the shutdown used for electronic products.

[0012] 为了对第二电源转换芯片的运行实现有效地控制,在所述第二电源转换芯片的使能端连接一开关电路,所述开关电路在接收到系统主电路输出的所述全关机信号时动作,拉低第二电源转换芯片的使能端的电位,控制第二电源转换芯片停止运行,切断特定功能电路的供电而进入全系统关机状态;所述系统主电路在从全系统关机状态转入开机状态时,输出高电平有效的使能信号至所述第二电源转换芯片的使能端,控制第二电源转换芯片使能运行,将电池电压转换成所述特定功能电路所需的工作电压,为所述特定功能电路供电,并将输出的所述工作电压反馈至第二电源转换芯片的使能端,维持第二电源转换芯片持续运行,控制所述特定功能电路的持续上电运行。 [0012] In order to achieve effective control of the power conversion operation of the second chip, the second power conversion chip enable terminal connected to a switching circuit, the switching circuit shuts down the whole of the main circuit receiving the output of the system when the operation enable signal, the second down conversion chip enable terminal of the power supply potential of the second power converter control device stops running, cut off the power supply circuit and enters a particular function of system-wide shutdown state; from the system-wide power-off state of the main circuit of the system when turned into, an active-high output of the second power conversion chip enable signal to the enable terminal, a second control operation of power conversion chip enable, to convert the battery voltage to the desired specific functional circuit operating voltage, the power supply circuit to the specific function, and outputs the operation voltage of the second power converter is fed back to the chip enable terminal, a second power conversion chip maintain continuous operation, controlling the duration of the specific function circuit electric operation.

[0013] 优选的,在所述开关电路中设置有一N沟道MOS管,所述MOS管的栅极接收所述的全关机信号,漏极连接第二电源转换芯片的使能端,源极接地;通过所述系统主电路输出的所述使能信号通过一防反偏二极管传输至所述第二电源转换芯片的使能端。 [0013] Preferably, the switching circuit is disposed in a N-channel MOS transistor, a gate receiving the signal off the whole of the MOS transistor, a drain connected to the second power conversion chip enable terminal, a source ground; the enable signal outputted by the main circuit of the system by preventing a reverse biased diode is transmitted to the second power conversion chip enable terminal.

[0014] 优选的,所述特定功能电路可以是实时时钟电路,用于生成时钟信号并传输至所述的系统主电路,由此可以在电子产品上实现显示实时时钟的功能。 [0014] Preferably, the specific function circuit may be a real time clock circuit for generating a clock signal and transmitted to the main circuit, whereby display can be achieved on the real-time clock function in electronic products.

[0015] 优选的,所述开机按键和全关机按键优选采用不具有保持功能的机械按键,所述全关机按键优选安装在电子产品的外壳内,仅供技术人员在电子产品出厂前操作使用;而所述的开机按键可以外露电子产品的外壳,供技术人员和普通用户使用。 [0015] Preferably, the all-off button and power button is preferably mechanically holding function keys do not have the full off button is preferably mounted within the housing of an electronic product, for use in the prior art operate electronic products manufactured; and said power key electronics housing can be exposed, and the art for ordinary users.

[0016] 基于上述关机控制电路的结构设计,本发明还提出了一种采用所述关机控制电路设计的电子产品,所述电子产品采用电池供电;在所述电子产品中设置有电源管理电路、系统主电路和在电子产品使用关机时要求持续运行的特定功能电路;在所述电源管理电路中设置有为系统主电路供电的第一电源转换芯片和为所述特定功能电路供电的第二电源转换芯片;在所述电子产品上设置有开机按键和全关机按键,所述开机按键的一端连通电池的正极,另一端连通第一电源转换芯片的使能端,在开机按键按下时,控制第一电源转换芯片使能,将电池电压转换成系统电压,为系统主电路供电;所述全关机按键的一端连通所述的系统电压,另一端连通系统主电路,所述系统主电路在检测到全关机按键按下时,输出全关机信号控制第二电源转换芯片停止运行,切 [0016] The shutdown control circuit design of structures, the present invention further provides a use of the shutdown control circuit design of electronic products, electronic products using a battery; power management circuit is provided in the electronic products, main circuit when the electronic product and durable operation shutdown circuit specific function; promising main circuit power supply is provided in the power management circuit in a first chip and a second power conversion is a power supply circuit of the specific function conversion chip; provided on the electronic products are full off button and power button, the power button of the positive end of the cell communication, and the other end communicates with the first power conversion chip enable terminal, when the power button is pressed, control a first chip enable power conversion, to convert the battery voltage to the system voltage, system main circuitry; end of the full-off button of the communication system voltage, and the other end communicating the main circuit, the main circuit in the detection system when the button is pressed to the full shutdown, the shutdown signal to control the second output of the full chip power converter stops to run, cut 断所述特定功能电路的供电,并控制系统主电路关机。 Specific function off the power supply circuit and the main circuit control system shutdown.

[0017] 与现有技术相比,本发明的优点和积极效果是:本发明通过在电子产品中设计全系统关机功能,在电子产品出厂时,可以控制电子产品进入全系统关机模式,以最大限度地降低电池电量的消耗,保证电子产品在充电出厂后,即便是在库房中存放了很长时间,在到达消费者手中时也能照常开机运行,完成消费者的初次体验,由此消除了因无法开机问题对消费者购买意愿造成的影响。 [0017] Compared with the prior art, the advantages and positive effects of the invention are: the present invention by designing a system-wide shutdown function in electronic products, electronic products at the factory, you may control the electronic products into a system-wide shutdown mode, the maximum limits to reduce drain on the battery, after charging to ensure electronic products factory, even if stored in a warehouse for a long time, can also be switched on as usual upon reaching the hands of consumers, consumers who complete the first experience, thereby eliminating affect the willingness caused due to not turn the issue of consumer purchase. 本发明所提出的关机控制技术尤其适合应用在电池容量较小的穿戴类电子产品中,以尽可能地延长该类电子产品的库存时间。 Shutdown control technique proposed by the present invention is particularly suitable for use in a battery capacity smaller wearable electronic products, electronic products such to extend storage time as possible.

[0018] 结合附图阅读本发明实施方式的详细描述后,本发明的其他特点和优点将变得更加清楚。 [0018] The accompanying drawings in conjunction upon reading the detailed description of embodiments of the present invention, other features and advantages of the present invention will become more apparent.

附图说明 BRIEF DESCRIPTION

[0019] 图1是本发明所提出的关机控制电路中系统主电路的一种实施例的电路原理图; 图2是为图1所示系统主电路提供电源供给的一种实施例的系统主电源电路原理图; 图3是用于控制图2所示系统主电源电路的一种实施例的控制电路原理图; [0019] FIG. 1 is a system shutdown control circuit of the main circuit of the present invention proposed a schematic circuit diagram of an embodiment; FIG. 2 is to provide a power supply for the main circuit shown in FIG. 1 one embodiment of a system main a power supply circuit diagram; FIG. 3 is one kind of system shown in FIG. 2 for controlling the main power source circuit of the control circuit diagram of an example of embodiment;

图4是本发明所提出的关机控制电路中特定功能电路的一种实施例的电路原理图; FIG 4 is a shutdown control circuit proposed by the present invention, specific functional circuit schematic circuit diagram of the embodiment;

图5是为图4所示特定功能电路提供电源供给的一种实施例的电源电路原理图。 FIG 5 is to provide a power supply circuit for the specific functions shown in FIG. 4 schematic diagram of the power supply circuit of one embodiment.

具体实施方式 detailed description

[0020] 下面结合附图对本发明的具体实施方式作进一步详细地说明。 [0020] The following drawings of specific embodiments of the present invention will be explained in more detail in conjunction.

[0021] 本实施例针对采用电池供电的电子产品设计电源电路,为了最大限度地减少电池电量的消耗,尽可能地延长该类电子产品的库房存放时间,保证消费者在购买该类电子产品时能够正常开机完成初次体验,本实施例在所述电子广品中设计全新的关机控制电路,在保留传统的使用关机处理模式的基础上,增加了全系统关机控制模式,通过控制电子产品内部的系统电路全部关闭,从而最大程度地节省了电能。 [0021] When the present embodiment, a power supply circuit for electronic design battery-powered, in order to minimize battery power consumption, as much as possible to extend the shelf life of such electronic warehouse products, to ensure purchase of such consumer electronic products It turns on properly completed first experience, the present embodiment is designed new shutdown control circuit in the electronic products in a wide, while retaining the traditional use of the shutdown processing mode, system-wide shutdown increase control mode, by controlling the internal electronic products all closed system circuit, in order to maximize energy savings.

[0022] 下面以穿戴类电子产品为例,对本实施例所提出的关机控制电路的具体电路结构及其工作原理进行详细阐述。 [0022] In the following wearable electronic products, for example, be present in detail a specific circuit configuration and operation principle of the proposed embodiment shutdown control circuit embodiment.

[0023] 在目前的绝大多数穿戴类电子产品中,其内部的系统主电路部分通常设计成可以由用户对其进行开关机控制,而对于系统中的某些特定功能电路,例如实时时钟电路等,为了保证计时时间的准确性,即使用户执行了关机操作,这部分功能电路也不会关机,仍在持续运行,由此造成了对电池电量的持续消耗。 [0023] In the vast majority of current wearable electronics, the main circuit portion is generally designed to its internal switch may be controlled by a user thereof, and for certain functions of the circuitry, for example real time clock circuit and so on, in order to ensure the accuracy of counting time, even if the user performs a shutdown operation, this part of the function of the circuit will not be shut down, continues to run, thus creating a continuous drain on battery power.

[0024] 由于这部分特定功能电路所实现的功能在电子产品从出厂到拿到消费者手中的这段期间可能并不是必须的,因此为了延长电子产品出厂后在库房的存放时间,本实施例提出了一种控制这部分特定功能电路在电子产品库存的期间内关闭,而在用户使用后不间断运行的设计思想,继而在保证电子产品现有功能不变的前提下,减少了产品在库存期间的电量消耗,延长了产品的库存时间。 [0024] As part of this particular function circuit functions implemented in the electronic products from the factory to the hands of the consumer to get the period may not be necessary, so in order to extend the storage time of the electronic warehouse products manufactured, the present embodiment this section presents a specific control function in closed circuit during the electronic product inventory, but after users uninterrupted operation of the design, and then to ensure existing functionality of electronic products under the same premise, reducing the product in stock during power consumption, extending the product's inventory time.

[0025] 为了实现上述设计目的,本实施例在电子产品上设计了开机按键SWl和全关机按键SW2,结合图1-图3所示,所述开机按键SWl和全关机按键SW2优选采用目前常用的不具有保持功能的机械按键实现。 [0025] To achieve the above object designed, in the present embodiment, the power button electronics design SWl and SW2 full off button, in conjunction with FIG. 1 to FIG. 3, the whole power button SWl and SW2 off button currently used preferably employed It does not have the mechanical holding function keys implemented. 其中,开机按键SWl用于对电子产品进行开机控制,连接在电子产品内部的电池与系统主电源电路之间。 Wherein the SWl start button for electronic products power control, connected between the battery and the electronics inside the main power system circuit. 具体来讲,可以将开机按键SWl的一端连接电池的正极VBAT,另一端连通系统主电源电路中的第一电源转换芯片U5的使能端CE。 Specifically, the positive electrode may be switched VBAT end key SWl connected battery, the other end of the communication system in the main power circuit of a first power conversion chip U5 is enabled peer CE. 所述第一电源转换芯片U5用于将电池电压转换成系统主电路所需的工作电压(以下称为系统电压VSYS_3V0),为系统主电路供电,具体可选用低压差线性稳压器LDO或者DC-DC转换器实现电池电压到系统电压VSYS_3V0的转换。 The first chip U5 power converter for converting a battery voltage to a main circuit required operating voltage (hereinafter referred to as system voltage VSYS_3V0), the main circuit power supply system, particularly the choice of low-dropout linear regulator or a DC LDO -DC converter system voltage to the battery voltage to achieve VSYS_3V0 conversion.

[0026] 本实施例将第一电源转换芯片U5的输入端VDD连接电池的正极VBAT,并通过电容C3接地,利用电容C3对电池输出的电压进行滤波处理,以保证输入到第一电源转换芯片U5的电压稳定。 [0026] The present VDD input terminal of the first battery is connected to the positive power conversion chip U5 VBAT embodiment, and using the output voltage of the battery to the capacitor C3 is processed by filtering capacitor C3 to ground, to ensure that the input to the first power conversion chip U5 voltage stability. 将第一电源转换芯片U5的输出端VOUT连接系统主电路,并通过设计滤波电容C5来保证提供给系统主电路的系统电压VSYS_3V0稳定。 A first power conversion chip U5 is connected to the output terminal VOUT of the main circuit, and through the design to ensure that the filter capacitor C5 is supplied to the main circuit of the system voltage stabilization VSYS_3V0.

[0027] 在系统主电路中设计有主控芯片U2和与其连接的外围功能电路(图中未示出)。 [0027] The design of the master chip U2 and its peripheral function circuit (not shown) connected to the main circuit system. 在本实施例中,所述主控芯片U2作为整个系统的控制核心,可以选用单片机MCU或者CPU。 In the present embodiment, the main control chip U2 as the control center of the system, can use the microcontroller MCU or CPU. 由于开机按键SWl不具有保持功能,当用户按下后松手,开机按键SWl会立即断开,继而导致第一电源转换芯片U5停止使能。 Since the power button SWl having no holding function, the user presses when let go, the power button SWl is dropped immediately in turn leads to a first power conversion chip U5 Stop Enable. 为了保证用户在按下开机按键SWl控制电子产品开机时,第一电源转换芯片U5能够持续输出系统电压VSYS_3V0,保证系统主电路持续上电运行,本实施例设计主控芯片U2在进入开机运行模式后,输出高电平有效的开机信号PWR_0N_CTL,传输至第一电源转换芯片U5的使能端CE,控制第一电源转换芯片U5继续使能运行。 In order to ensure that the user presses the start button SWl power control electronics, the first power conversion chip U5 voltage output system can continue VSYS_3V0, main circuit to ensure continuous operation of the power, the present embodiment designs the master chip U2 to enter the boot operation in the embodiment mode after the start signal is active high output PWR_0N_CTL, transmitted to the first power conversion U5 chip enable terminal CE, the first power conversion control chip U5 continues to run.

[0028] 作为本实施例的一种优选设计方式,本实施例在系统主电源的控制电路中设计了一个双二极管器件D2,如图3所示。 [0028] As a preferred embodiment of the design approach of the present embodiment, the present embodiment is designed with a double diode D2 in the control circuit of the main device power supply system, as shown in FIG. 所述双二极管器件D2的两个阴极对接,并与第一电源转换芯片U5的使能端CE相连接,双二极管器件D2的两个阳极一个连接所述的开机按键SWl,另一个连接所述主控芯片U2输出开机信号PWR_0N_CTL的引脚,例如主控芯片U2的其中一路GP1 口P0.10。 The two double diode D2, the cathode docking device, and the first power conversion chip U5 is connected to the enable terminal CE, two anode double diode D2 is a device connected to the start button SWl, and connects the other master chip U2 outputs PWR_0N_CTL start signal pins, for example the way in which the master chip U2 port GP1 P0.10. 利用二极管器件的反向截止特性,保证通过按压开机按键SWl产生的使能信号以及通过主控芯片U2输出的开机信号PWR_0N_CTL能够以正确的流向传送至第一电源转换芯片U5的使能端CE,控制第一电源转换芯片U5在电子产品开机运行的期间内持续使能运行。 Using the reverse blocking characteristics of a diode device, to ensure that the enable signal generated by pressing the start button SWl and can be transmitted to the first power conversion chip enable signal U5 by a power control chip U2 PWR_0N_CTL correct flow output enable terminal CE, the first power conversion control chip U5 is enabled to run continuously over a period of running power electronics.

[0029] 在第一电源转换芯片U5的使能端CE与系统地之间还分别连接有储能电容C4和放电电阻R8,如图2所示,以用于延迟第一电源转换芯片U5关断的时序。 [0029] In the first power conversion chip enable CE and U5 system can be also connected with a terminal of the storage capacitor C4 and the discharge resistor R8, as shown in FIG. 2, for delaying a first power conversion chip U5 Off off timing. 此部分电路的工作原理将在后续的描述中具体阐述。 Principle of operation of the circuit will be specifically set forth in the subsequent description.

[0030] 全关机按键SW2用于控制电子产品的整个系统电路全部关闭,本实施例将其连接在第一电源转换芯片U5的输出端VOUT与主控芯片U2的其中一路GP1 口P0.28之间,如图1所示。 [0030] Full off button SW2 circuit for controlling the entire system of electronic products all closed, the present embodiment will be connected at a first power conversion chip U5 output terminal VOUT and the way in which the master chip U2 port GP1 of P0.28 between, as shown in FIG. 当主控芯片U2检测到所述全关机按键SW2按下时,即其GP1 口P0.28由低电平跳变成高电平时,输出全关机信号RTC_LD0_SHUT (可以由主控芯片U3另外一路GP1 口P0.09输出)至电子产品中的特定功能电路,控制所述特定功能电路关闭。 When the master chip U2 detects the full off button SW2 is pressed, i.e., which port GP1 P0.28 when jumping from the low to the high level, the output signal of the full shutdown RTC_LD0_SHUT (a master chip U3 may additionally way GP1 P0.09 output port) to the electronic product in particular functional circuit, a control circuit closes the specific function.

[0031 ] 在本实施例中,所述特定功能电路优选以实时时钟电路为例进行说明,包括第二电源转换芯片Ul和实时时钟芯片U4等主要组成部分,结合图4、图5所示。 [0031] In the present embodiment, preferably the specific function to real time clock circuit will be described as an example, including the main components of a second power conversion chip real time clock chip Ul and U4, etc., in conjunction with FIG. 4, FIG. 5. 所述第二电源转换芯片Ul同样可以选用低压差线性稳压器LDO或者DC-DC转换器,用于将电池电压转换成所述实时时钟芯片U4所需的工作电压RTC_3V0,为实时时钟芯片U4供电。 The second power converter can use the same chip Ul low-dropout linear regulator or LDO DC-DC converter for converting a battery voltage into the operating voltage of the real time clock chip U4 RTC_3V0 needed, real-time clock chip U4 powered by.

[0032] 具体来讲,可以将第二电源转换芯片Ul的输入端VDD连接电池的正极VBAT,并通过滤波电容C2接地;将第二电源转换芯片Ul的输出端VOUT连接实时时钟芯片U4的供电端VDD,并通过滤波电容Cl、C7对第二电源转换芯片Ul转换输出的工作电压RTC_3V0进行滤波处理。 [0032] Specifically, the input terminal of a second battery connected to VDD power conversion chip Ul the VBAT positive electrode, and the capacitor C2 is grounded through the filter; VOUT output terminal of the second power converter is connected to power supply chip Ul real time clock chip U4, terminal VDD, and through the filter capacitor Cl, C7 of the second power converter operating voltage conversion chip Ul RTC_3V0 output filtering process. 将第二电源转换芯片Ul的使能端CE—路通过限流电阻R3连接至其输出端V0UT,另一路通过一开关电路的开关通路接地,所述开关电路的控制端连接所述的主控芯片U2,接收主控芯片U2输出的全关机信号RTC_LD0_SHUT。 Ul second power conversion chip enable terminal CE- path through the current limiting resistor R3 is connected to an output terminal VOUT, another path through the switch to ground via a switch circuit, the switch control terminal is connected to the main control circuit chip U2, the reception of all the shutdown signal output RTC_LD0_SHUT master chip U2.

[0033] 在本实施例中,所述开关电路优选采用一颗N沟道MOS管Ql配合简单的外围电路设计而成,如图5所示。 [0033] In the present embodiment, the switching circuit preferably uses an N-channel MOS transistor Ql with a simple external circuit designed as shown in FIG. 将N沟道MOS管Ql的栅极连接至主控芯片U2的P0.09引脚,接收主控芯片U2输出的全关机信号RTC_LD0_SHUT,并通过配置电阻R4接地。 The gate of the N-channel MOS transistor Ql is connected to the master chip U2 pin P0.09, the reception of all the shutdown signal output U2 RTC_LD0_SHUT master chip, and by arranging the resistor R4 is grounded. 将所述N沟道MOS管Ql的源极接地,漏极连接第二电源转换芯片Ul的使能端CE,或者通过一颗阻值较小的电阻R5连接至第二电源转换芯片Ul的使能端CE。 The source of the N channel MOS transistor Ql is grounded, a drain connected to the second power conversion Ul chip enable terminal CE, or connected to the second power conversion chip Ul through a smaller resistance value of the resistor R5 so that You can peer CE. 在需要控制实时时钟芯片U4关闭时,可以通过主控芯片U2输出高电平有效的全关机信号RTC_LD0_SHUT,继而控制N沟道MOS管Ql饱和导通,拉低第二电源转换芯片Ul的使能端CE的电位,控制第二电源转换芯片Ul停止运行,进而切断向实时时钟芯片U4的供电,以达到控制实时时钟芯片U4断电关机的设计目的。 The need to control the real time clock chip U4 when closed, U2 outputs an active high signal RTC_LD0_SHUT full off by the master chip, which in turn controls the N-channel MOS transistor Ql saturated conduction, the second power down conversion chip enable Ul end CE the potential to control the second power converter chip Ul stopped, to turn off the power of the real time clock chip U4, designed in order to control the real time clock chip U4 of power shutdown.

[0034] 当然,所述开关电路也可以采用三极管、可控硅等其他具有开关作用的元器件进行电路的具体设计,本实施例并不仅限于以上举例。 [0034] Of course, the switching circuit may employ concrete design transistor, SCR, and other components a circuit having a switching function, the present embodiment is not limited to the above example.

[0035] 此外,为了在实时时钟芯片U4关闭后,能够重新启动运行,本实施例设计主控芯片U2在需要控制实时时钟芯片U4开机时,输出使能信号RTC_LD0_EN (例如通过主控芯片U2的GP1 口P0.08输出),通过防反偏二极管D105和限流电阻Rl传输至第二电源转换芯片Ul的使能端CE,控制第二电源转换芯片Ul使能运行,进而将电池电压转换成实时时钟芯片U4所需的工作电压RTC_3V0,为实时时钟芯片U4供电。 [0035] Further, in order to shut down the real time clock chip U4, it is possible to restart the operation, embodiments of the present embodiment designs the master chip U2 needed control power real time clock chip U4, the output enable signal RTC_LD0_EN (e.g. by master chip U2. GP1 output port P0.08), by the anti-reverse-biased diodes D105 and current limiting resistor Rl is transmitted to the second power conversion Ul chip enable terminal CE, the second power conversion control chip Ul enable operation, thereby converting the battery voltage into required operating voltage U4 real time clock chip RTC_3V0, supply real time clock chip U4. 实时时钟芯片U4上电运行后,生成时钟信号,经由I2C总线SDA、SCL传输至主控芯片U2,经由主控芯片U2生成当前时钟,并通过电子产品上的显示屏输出显示。 After power running real time clock chip U4 generates a clock signal, via the I2C bus SDA, SCL is transmitted to the master chip U2, the current generated by the master clock chip U2, and displayed through the display output electronics.

[0036] 下面结合图1-图5所示的电路结构,对本实施例的工作原理进行具体阐述。 [0036] below with reference to the circuit configuration shown in FIG. 1 to FIG. 5, the operation principle of the present embodiment will be specifically described.

[0037] 在电子产品出厂前,为了延长电子产品的库存时间,技术人员可以操作电子产品进入全系统关机模式。 [0037] In the former electronics factory, electronic products, in order to extend the storage time, the technician can operate the electronic products into a system-wide shutdown mode. 针对电子产品当前所处的状态:使用关机状态或是开机状态,本实施例提出两种控制电子产品进入全系统关机模式的操作方式。 For which the current state of the electronic products: use state or power off state, the present embodiment proposes two control electronics system-wide shutdown mode into the operating mode.

[0038] 若电子产品当前正处于使用关机状态(即系统主电路关闭,而特定功能电路运行),此时,可以采用同时按下开机按键SWl和全关机按键SW2的方式来控制电子产品进入全系统关机模式。 [0038] When the electronic product is currently used in the off state (i.e., the main circuit is closed, while the specific function circuit operation) In this case, press the power button may be used SWl and SW2 off button whole way to control the whole electronic products into system shutdown mode. 当开机按键SWl按下时,电池电压VBAT经滤波电容C8滤波后,控制双二极管器件D2中的其中一个二极管正向导通,另一个二极管反向截止,并通过导通的二极管传输至第一电源转换芯片U5的使能端CE,控制第一电源转换芯片U5使能运行,并同时为储能电容C4充电。 When the start button is pressed SWl, filtered battery voltage VBAT filter capacitor C8, control double diode device in which a diode D2 is forward, the other reverse-blocking diode, and the diode is turned on by the transmission power to the first U5 converting chip enable terminal CE, the first power conversion control chip U5 is enabled to run, and at the same time charging the storage capacitor C4. 第一电源转换芯片U5使能运行后,将电池电压VBAT转换成系统电压VSYS_3V0为主控芯片U2供电,使主控芯片U2开机运行。 After the first power conversion chip U5 is enabled to run, the system converts the battery voltage VBAT to the voltage U2 supply VSYS_3V0 as the main chip, so that the master chip U2 switched on. 主控芯片U2开机后,首先检测全关机按键SW2是否被按下,若全关机按键SW2未被按下,则判定要求进入开机模式,具体控制过程将在后续部分进行详细阐述。 After the power control chip U2, firstly, whether full off button SW2 is pressed, if the full off button SW2 is not pressed, it is determined that requested access to the boot mode, detailed control process will be described later in detail. 若全关机按键SW2被按下,则判定要求进入全系统关机模式。 If the full off button SW2 is depressed, it is determined that requested access to the system-wide shutdown mode. 此时,主控芯片U2输出高电平有效的全关机信号RTC_LDO_SHUT,控制N沟道MOS管Ql饱和导通,拉低第二电源转换芯片Ul的使能端CE电位,控制第二电源转换芯片Ul停止运行。 At this time, the master chip U2 outputs an active high all-off signal RTC_LDO_SHUT, controlling the N-channel MOS transistor Ql saturated conduction, the second power down conversion chip enable terminal CE Ul potential, the second power conversion control chip Ul stop running. 此时,由于第二电源转换芯片Ul不再输出实时时钟芯片U4所需的工作电压RTC_3V0,因此,实时时钟芯片U4断电停止运行。 At this time, since the second output of the power converter is no longer required chip Ul real time clock chip operating voltage U4 RTC_3V0, therefore, real time clock chip U4 power to stop running. 然后,主控芯片U2进入关机状态,对寄存器、存储器的数据进行保存。 Then, the master chip U2 to enter the off state, to register, memory to save the data. 由于开机按键SWl在按下并保持一段时间后会因技术人员松手而断开,为了给主控芯片U2预留出足够的用于执行启动、输出全关机信号RTC_LD0_SHUT以及进行数据保存等工作的时间,本实施例可以采用适当调整储能电容C4的电容值以及放电电阻R8的阻值的方式来满足主控芯片U2工作时间的要求。 Since the power button SWl art due to loosely pressed and disconnected after a period of time, in order to reserve enough U2 master chip for performing startup, shutdown signal output of the full RTC_LD0_SHUT data to be saved and time, etc. , the present embodiment can be adjusted using the capacitance value of the storage capacitor C4 and a discharge resistor R8 manner to meet the requirements of working time control chip U2. 即,当开机按键SWl断开后,储能电容C4通过放电电阻R8放电。 That is, when the power button SWl is turned off, the storage capacitor C4 is discharged through the discharging resistor R8. 在储能电容C4放电的期间内,第一电源转换芯片U5的使能端CE仍可以保持高电平有效状态,从而维持第一电源转换芯片U5继续使能运行,为主控芯片U2供电。 During the period of the energy storage capacitor C4 discharges, a first power conversion chip enable terminal CE U5 is still held active high state, thereby maintaining the first power conversion chip U5 continues to run, the power supply for the master chip U2. 当储能电容C4放电结束时,第一电源转换芯片U5的使能端CE电位变低,第一电源转换芯片U5停止运行,切断向主控芯片U2的供电,进而控制主控芯片关机,由此便实现了全系统关机功能。 When the storage capacitor C4 discharge end, a first power conversion chip enable terminal CE U5 is low potential, the first power conversion chip U5 stop running, cut off the power supply to the master chip U2, and thus control of the control chip is shut down by this will achieve a system-wide shutdown.

[0039] 若电子产品当前正处于开机运行状态,则此时可以采用按下全关机按键SW2的方式来控制电子产品进入全系统关机模式。 [0039] When the electronic product is currently in the power-running state, at this time may be controlled electronics system-wide shutdown mode into the all-off button is pressed using SW2 manner. 当全关机按键SW2被按下时,通过第一电源转换芯片U5转换输出的系统电压VSYS_3V0经由闭合的全关机按键SW2传输至主控芯片U2的P0.28引脚。 When the full off button SW2 is pressed, the first power conversion chip U5 converts the output voltage of the system via total VSYS_3V0 closed off button SW2 transmitted to the master chip U2 P0.28 pin. 主控芯片U2在检测到其P0.28引脚的电位变高时,判定要求进入全系统关机模式。 U2 master chip when detecting that the potential of its P0.28 pin becomes high, it is determined to enter the required system-wide shutdown mode. 此时,主控芯片U2首先输出全关机信号RTC_LD0_SHUT,控制第二电源转换芯片Ul和实时时钟芯片U4停止运行;其次,控制与其连接的外围功能电路关机;而后,主控芯片U2将其输出的开机信号PWR_0N_CTL置为低电平,此时储能电容C4通过放电电阻R8放电,控制第一电源转换芯片U5在维持RC时间后关闭。 At this time, the master chip U2 first output of the full shutdown signal RTC_LD0_SHUT, controls the second power conversion chip real time clock chip Ul and U4 stopped; secondly, to control its peripheral function circuit connected to the shutdown; then, the master chip outputs of U2 PWR_0N_CTL start signal is set to low, then the storage capacitor C4 discharges through a discharge resistor R8, a first power conversion control chip U5 is maintained closed after the RC time. 在储能电容C4放电的期间内,主控芯片U2对寄存器、存储器的数据进行保存,待第一电源转换芯片U5关闭时,全系统进入关机模式。 During the period of the storage capacitor C4 discharges, U2 master chip register, saved data memory, when the first power conversion chip U5 to be shut down, the whole system enters shutdown mode.

[0040] 在电子产品进入全系统关机模式后,由于没有任何电量消耗,因此可以保证电子产品在库房中存放很长时间。 [0040] After the electronic products into a system-wide shutdown mode, because there is no power consumption, it can be stored for long periods to ensure that electronic products in the warehouse.

[0041] 当电子产品第一次出售到消费者手中时,可以按下开机按键SWl控制电子产品开机运行。 [0041] When the electronic products sold to consumers for the first time, you can press the power button SWl control electronics switched on. 在开机按键SWl按下时,首先利用电池电压VBAT控制第一电源转换芯片U5使能运行,为系统主电路供电。 When pressing the start button SWl, firstly control the battery voltage VBAT so that the first power conversion chip U5 to run, the main circuit power supply for the system. 待主控芯片U2上电运行后,输出高电平的开机信号PWR_0N_CTL,通过双二极管器件D2传输至第一电源转换芯片U5的使能端CE,使第一电源转换芯片U5即便在开机按键SWl断开后也能持续使能运行,一直为系统主电路供电,实现自锁功能。 After the power control chip U2 to be run, outputs a high level start signal PWR_0N_CTL, through dual diode D2 is transmitted to the device a first power conversion chip U5 enable terminal CE, the first power conversion chip U5 even if the start button SWl after the disconnection can continue to run so that, for the main circuit has been powered, self-locking function. 而后,主控芯片U2输出高电平的使能信号RTC_LD0_EN,通过防反偏二极管D106和限流电阻Rl作用于第二电源转换芯片Ul的使能端CE,控制第二电源转换芯片Ul使能运行,输出实时时钟芯片U4所需的工作电压RTC_3V0,控制实时时钟芯片U4上电运行。 Then, the master chip U2 outputs a high level enable signal RTC_LD0_EN, by the anti-reverse-biased diodes D106 and current limiting resistor Rl applied to the second power conversion Ul chip enable terminal CE, the second power conversion control chip Ul enable required to run, the output of real time clock chip operating voltage U4 RTC_3V0, run on a real-time clock control circuit chip U4. 在第二电源转换芯片Ul使能运行后,将通过第二电源转换芯片Ul输出的工作电压RTC_3V0同时经由限流电阻R3作用于第二电源转换芯片Ul的使能端CE,由此一来,即便是在主控芯片U2断电不再输出高电平的使能信号RTC_LDO_EN时,也能利用第二电源转换芯片Ul自身输出的工作电压RTC_3V0维持第二电源转换芯片Ul 一直使能运行,进而保证实时时钟芯片U4在开机和使用关机状态下都能保持运行状态,确保计时的准确性。 In the second power conversion chip Ul operation is enabled, the output Ul conversion chip by a second power supply voltage via a current limiting resistor RTC_3V0 R3 simultaneously applied to the second power conversion Ul chip enable terminal CE, to thereby one, even when the power down enable signal outputs a high level is no longer in RTC_LDO_EN master chip U2, you can also use the operating voltage of the second power converter chip Ul RTC_3V0 itself maintains the second power converter output Ul always enabled chip, which could ensure real-time clock chip U4 in the boot and shutdown state can use to keep running, ensure the accuracy of timing.

[0042] 在消费者第一次启动所述电子产品时,需要对系统时钟进行调整,一次调整后,实时时钟芯片U4会自动累计计时时间,保证日后系统时钟的准确显示。 [0042] when the consumer electronic products, the need to adjust the system clock, after adjustment, real-time clock chip U4 will automatically cumulative time of time, to ensure the future of the system clock accurately display the first time. 主控芯片U2在控制特定功能电路启动运行后,输出控制信号控制与其连接的外围功能电路启动运行,完成产品开机。 Peripheral function circuit control chip U2 start operation after the control circuit to start operation of a particular function, the output control signal connected thereto, power the finished product.

[0043] 在消费者对所述电子产品执行了一次开机启动后,若消费者不想使用需要关机,可以通过操作电子产品的触摸屏调取出关机界面,通过操作关机界面控制电子产品进入使用关机状态。 [0043] In the consumer after performing a start-up, if the consumer does not want to use need to shut down, can be adjusted by operating the electronic interface taken off a touch screen products the electronic products, the use of control electronics into the off state by the operation shutdown interface . 当电子产品因用户操作需要进入使用关机状态,或者因电池电量不足自动关机时,主控芯片U2首先控制与其连接的外围功能电路关机,然后置开机信号PWR_ON_CTL为低电平,停止向第一电源转换芯片U5提供有效的使能信号。 When electronic products due to the use of the user is required to enter the off state, or automatically shut down due to low battery power, the master chip U2 its first control circuit connected to the shutdown function of the peripheral, then set PWR_ON_CTL start signal is low, the first power is stopped U5 provides effective conversion chip enable signal. 然后,主控芯片U2进入关机状态,对寄存器、存储器的数据进行保存,待储能电容C4放电结束后,第一电源转换芯片U5停止运行,切断系统主电路的供电,系统主电路停止运行,电子产品进入使用关机状态。 Then, the master chip U2 to enter the off state, to the register, the data memory is stored, until the storage capacitor C4 discharge end, a first power conversion chip U5 stop running, cut off power supply of the main circuit, the main circuit is stopped, the use of electronic products to enter the shutdown state. 此时,由于第二电源转换芯片Ul和实时时钟芯片U4仍在运行,因此可以保证再次开机时,时钟显示的准确性,不用每次开机都需要重新设置时间。 At this time, since the second power conversion chip real-time clock chip Ul and U4 is still running, so you can ensure the accuracy of the boot again, the clock display, do not need to be reset each boot time.

[0044] 当消费者关机后需要重新开机时,只需按下开机按键SWl,控制第一电源转换芯片U5使能运行,为系统主电路供电。 [0044] When the consumer require a reboot after shutdown, simply press the start button SWl, a first power conversion control chip U5 is enabled to run, the power supply for the main circuit. 主控芯片U2启动后,将开机信号PWR_ON_CTL拉高,完成第一电源转换芯片U5的自锁,然后控制与其连接的外围功能电路开机运行,完成电子产品的开机启动。 After the master chip U2 starts, the start signal PWR_ON_CTL pulled, the first power conversion chip U5 to complete self-locking, and a function of controlling the peripheral circuits connected thereto switched on, the boot to complete the electronic product started.

[0045] 考虑到不同的关机模式适用的人群不同,对于电子产品的全系统关机控制功能并不适合普通消费者使用,因此,本实施例优选将全关机按键SW2设置在电子产品的内部,例如内置于产品外壳的内部,以避免消费者触及操作。 [0045] Taking into account the different shutdown mode applies different populations, for full system shutdown control function of the electronic product is not suitable for general consumer use, therefore, all-off button SW2 preferred embodiment of the present embodiment is provided inside the electronic product, e.g. built into the product inside of the housing, in order to avoid consumer touch operation. 而开机按键SWl则优选设置在电子产品的外壳上,或者采用在外壳上开孔外露的方式,以方便消费者操作。 SWl and the power button is preferably provided on the housing of the electronic product, or by way of the opening exposed on the housing to facilitate the consumer to operate.

[0046] 当然,上述说明并非是对本发明的限制,本发明也并不仅限于上述举例,本技术领域的普通技术人员在本发明的实质范围内所做出的变化、改型、添加或替换,也应属于本发明的保护范围。 [0046] Of course, the foregoing description is not a limitation of the present invention, the present invention is also not limited to the example described above, variations of ordinary skill in the art within the spirit of the present invention is made, modifications, additions or substitutions, It should also fall within the scope of the present invention.

Claims (10)

1.一种关机控制电路,应用在电池供电的电子产品中,在所述电子产品中设置有电源管理电路、系统主电路和在电子产品使用关机时要求持续运行的特定功能电路;其特征在于:在所述电源管理电路中设置有为系统主电路供电的第一电源转换芯片和为所述特定功能电路供电的第二电源转换芯片;在所述电子产品上设置有开机按键和全关机按键,所述开机按键的一端连通电池的正极,另一端连通第一电源转换芯片的使能端,在开机按键按下时,控制第一电源转换芯片使能,将电池电压转换成系统电压,为系统主电路供电;所述全关机按键的一端连通所述的系统电压,另一端连通系统主电路,所述系统主电路在检测到全关机按键按下时,输出全关机信号控制第二电源转换芯片停止运行,切断所述特定功能电路的供电,并控制系统主电路关机。 A shut down control circuit, used in battery-powered electronic products, provided certain functional circuits of a power management circuit, the main circuit and durable operation when the electronic products off at the electronic product; characterized in that : set promising main circuit power chip and a first power conversion circuitry to the specific function of the second power converter chip power management circuitry; and a power button provided on the all-off button Electronics , the positive end of the boot button cell communication, and the other end communicates with the first power conversion chip enable terminal, when the power button is pressed, the control of the first power conversion chip enable, converting the battery voltage to a system voltage, for the main circuit power supply system; the all-off button at one end of the communication system voltage, and the other end communicating the main circuit, the main circuit when detecting the full off button is pressed, the second control signal output of the full shutdown the power converter chip is stopped, cutting off power supply to the specific function circuit, and controls the main circuit shutdown.
2.根据权利要求1所述的关机控制电路,其特征在于:在所述系统主电路中设置有主控芯片和与其连接的外围功能电路,所述全关机按键连接在电池与所述主控芯片之间; 在电子产品处于开机运行状态时,若主控芯片检测到所述全关机按键被按下,则首先输出全关机信号控制所述特定功能电路关闭,其次控制所述的外围功能电路关机,最后控制第一电源转换芯片停止运行,切断系统主电路的供电,实现全系统关机; 在电子产品处于使用关机状态时,若需要控制电子产品转入全系统关机模式,则同时按下所述的开机按键和全关机按键,所述第一电源转换芯片在开机按键按下时使能运行,为主控芯片供电;所述主控芯片在上电运行后首先检测全关机按键是否按下,若未被按下,则判定进入开机模式,输出控制信号维持第一电源转换芯片使能运行,并控制 2. The shutdown control circuit according to claim 1, wherein: the master chip is provided with a function and its peripheral circuit connected to the main circuit in the system, the full off button battery connected with the master between the chips; when the electronic product is switched operating state, the master chip if the detected full off button is pressed, the first shutdown signal to control the output of the full specific function circuit closes, followed by the control circuit of the peripheral function off of the last chip to control the first power converter stops to run, the main circuit power supply cut system, system-wide shutdown; used when the electronic product is turned off, if desired, the control electronics into a system-wide shutdown mode, press the full power button and said off button, the first power conversion chip enable run at boot time the button is pressed, power for the master chip; the control chip running after power is first detected whether a full off button is pressed , if not pressed, it is determined that enter the boot mode, the first output control signal to maintain the power converter chip enable operation, and controls 统主电路开机运行;若全关机按键被按下,则判定进入全关机模式,直接输出全关机信号控制所述的第二电源转换芯片和特定功能电路停止运行。 Main circuit power operation system; if full off button is pressed, it is determined to enter the full off mode, the direct output of the full chip off the second power conversion control signal and the specific function of the circuit to stop operation.
3.根据权利要求2所述的关机控制电路,其特征在于:在所述第一电源转换芯片的使能端与系统地之间连接有储能电容和放电电阻,在同时按下开机按键和全关机按键控制电子产品在使用关机状态下全关机时,所述储能电容在开机按键按下的期间内接收并储能电池电能,在开机按键断开时,通过放电电阻放电,延迟第一电源转换芯片关闭的时间,为主控芯片提供其完成全关机信号的输出以及数据保存工作所需的运行时间。 3. The shutdown control circuit according to claim 2, wherein: the first power conversion chip enable terminal of the storage capacitor is connected between the resistor and the discharge system, the power button is pressed and at the same time the fully off button controls electronic products using full shut off state, the storage capacitor and the storage battery power received during the period of the start button is pressed, when the power button is turned off, the discharge through discharge resistor, a first delay power conversion chip off time, which is required to provide a full completion of the shutdown signal and the output of data holding working run time for the master chip.
4.根据权利要求3所述的关机控制电路,其特征在于:所述第一电源转换芯片的使能端连接一双二极管器件的阴极,所述双二极管器件的阴极对接,两个阳极分别与所述的开机按键和主控芯片一一对应连接;所述主控芯片在需要控制整机开机运行时,输出开机信号通过所述的双二极管器件传输至第一电源转换芯片的使能端,控制第一电源转换芯片持续使能运行。 4. The shutdown control circuit according to claim 3, wherein: said first power conversion chip enable one pair connected to the cathode end of diode device, abutting the cathode dual diode device, respectively, the two anodes power button and said one-chip connected to the master; the master chip need to control the machine switched on, the output start signal transmitted through dual diode device according to the first power conversion chip enable terminal, the control The first power conversion chip enable continuous operation.
5.根据权利要求1所述的关机控制电路,其特征在于:在所述电子产品上设置有触摸屏,在电子产品处于开机运行状态时,通过操作触摸屏调取关机界面,通过操作关机界面仅控制所述的系统主电路关机,控制电子产品进入使用关机状态。 The shutdown control circuit according to claim 1, wherein: the electronic product provided with a touch screen, when the electronic product is switched operating state, by operating the touch screen interface retrieval shutdown, the shutdown operation through control interface only the shutdown of the main circuit, the control electronics used to enter a shutdown state.
6.根据权利要求1至5中任一项所述的关机控制电路,其特征在于:所述第二电源转换芯片的使能端连接一开关电路,所述开关电路在接收到系统主电路输出的所述全关机信号时动作,拉低第二电源转换芯片的使能端的电位,控制第二电源转换芯片停止运行;所述系统主电路在从全系统关机状态转入开机状态时,输出高电平有效的使能信号至所述第二电源转换芯片的使能端,控制第二电源转换芯片使能运行,将电池电压转换成所述特定功能电路所需的工作电压,为所述特定功能电路供电,并将输出的所述工作电压反馈至第二电源转换芯片的使能端,维持第二电源转换芯片持续运行。 The shutdown control circuit 1-5 in any one of the preceding claims, wherein: said second power conversion chip enable terminal connected to a switch circuit, receiving circuit in the main circuit of the switch output enable the full potential of the operation when the shutdown signal, the second power conversion chip down, controls the second power conversion chip stop running; when the main circuit into the system-wide power-on state from the off state, a high output effective level of the enable signal to the second power conversion chip enable terminal, a second control operation of power conversion chip enable, to convert the battery voltage to the required voltage of the specific circuit function as the specific the work function voltage supply circuit, and outputs fed back to the second power conversion chip enable terminal, a second power conversion chip maintain continuous operation.
7.根据权利要求6所述的关机控制电路,其特征在于:在所述开关电路中设置有一 N沟道MOS管,所述MOS管的栅极接收所述的全关机信号,漏极连接第二电源转换芯片的使能端,源极接地;通过所述系统主电路输出的所述使能信号通过一防反偏二极管传输至所述第二电源转换芯片的使能端。 7. The shutdown control circuit according to claim 6, wherein: the switching circuit is provided with an N-channel MOS transistor, a gate receiving the signal off the whole of the MOS transistor, a drain connected to the first two power conversion chip enable terminal, a source grounded; enable signal outputted by the main circuit of the system by preventing a reverse biased diode is transmitted to the second power conversion chip enable terminal.
8.根据权利要求1至5中任一项所述的关机控制电路,其特征在于:所述特定功能电路为实时时钟电路,生成时钟信号传输至所述的系统主电路。 8. The shutdown control circuit according to any one of claims 1 - 5, characterized in that: said circuit is a function of the specific real-time clock circuit which generates a clock signal to said main circuit.
9.根据权利要求1至5中任一项所述的关机控制电路,其特征在于:所述开机按键和全关机按键为不具有保持功能的机械按键,所述全关机按键安装在电子产品的外壳内,所述开机按键外露电子产品的外壳。 According to claim 1-1 shutdown to any of the control circuit of claim 5, wherein: the full power off button and the button does not have a mechanical key feature to maintain the full off button mounted in an electronic product within the housing, the boot button exposed electronic housings.
10.一种电子产品,其特征在于:设置有如权利要求1至9中任一项所述的关机控制电路。 An electronic product, comprising: a control circuit arranged to shut down like the one in any of claims 1 to 9.
CN 201510156733 2015-04-03 2015-04-03 Shut off the control circuit and a control circuit having electronic products CN104731305B (en)

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