CN103677191A - Electronic system, electronic device and power management method - Google Patents

The invention discloses an electronic system, an electronic device and a power management method. The electronic device comprises a core system, a rechargeable battery, a charger and a control unit. The core system is used to control the operation of the electronic device, and the charger is used to convert the power provided by the fixed power supply into a charging power. The control unit is used for detecting whether the electric quantity of the rechargeable battery is larger than a first preset value when a required power of the electronic device exceeds a maximum output power provided by the fixed power supply, and enabling the rechargeable battery and the fixed power supply to supply power to the core system simultaneously when the electric quantity of the rechargeable battery is larger than the first preset value. The invention can avoid the problem of system efficiency reduction caused by the fact that the required power of the electronic device is temporarily larger than the maximum output power of the power supply.

电子系统、电子装置以及电源管理方法Electronic system, electronic device and power management method

技术领域 technical field

本发明涉及一种电子系统，尤其涉及一种具有固定功率电源供应器的电子系统。The present invention relates to an electronic system, in particular to an electronic system with a fixed power power supply.

背景技术 Background technique

图1用以说明传统笔记型电脑中的电源管理器的工作原理。当电源供应器输出的电流IO流过电流检测器所造成的电压差Vcs提升至一第二电压Vcs1时，则表示笔记型电脑的所需功率(系统负载)PS到达电源供应器的额定输出功率P1。需注意的是，电源供应器的负载PA会等同于笔记型电脑的所需功率PS，并且电源供应器所输出的电压VO为定值。此时电源管理器会藉由减少电池的充电电流或停止对电池充电，使得电流检测器上的电压差低于第二电压Vcs1，使得笔记型电脑的所需功率PS低于电源供应器的额定输出功率P1。Figure 1 is used to illustrate the working principle of the power manager in a traditional notebook computer. When the voltage difference Vcs caused by the current IO output by the power supply flowing through the current detector increases to a second voltage Vcs1, it means that the required power (system load) PS of the notebook computer reaches the rated output power of the power supply. P1. It should be noted that the load PA of the power supply is equal to the required power PS of the notebook computer, and the output voltage VO of the power supply is a constant value. At this time, the power manager will reduce the charging current of the battery or stop charging the battery, so that the voltage difference on the current detector is lower than the second voltage Vcs1, so that the required power PS of the notebook computer is lower than the rated power of the power supply. Output power P1.

若是减少电池的充电电流或关闭电池充电器都无法使得电流检测器上的电压差低于第二电压Vcs1，电源管理器则会送出一系统电源管理信号，藉此强制减低中央处理器或系统其它装置的电流消耗，直到电流检测器上的电压差低于第二电压Vcs1，以避免电源供应器由于过负载而关闭(shutdown)。If reducing the charging current of the battery or turning off the battery charger cannot make the voltage difference on the current detector lower than the second voltage Vcs1, the power manager will send a system power management signal, thereby forcibly reducing the CPU or other system voltages. The current of the device is consumed until the voltage difference on the current detector is lower than the second voltage Vcs1, so as to avoid the shutdown of the power supply due to overload.

图2用以说明传统笔记型电脑中的电源供应器的操作特性。当电源供应器的输出电流IO超过一过负载线OLL时，过负载计时器(例如看门狗(watchdog)会进行计时，当负载计时器计数值C1超过预设值PV时，电源供应器则会关闭。如图2所示，于时间t1-t2时，由于输出电流IO未超过过负载线OLL，所以过负载计时器并未启动计时。于时间t3-t4，输出电流IO超过过负载线OLL，故过负载计时器启动计时直至输出电流IO降低至过负载线OLL以下；而由于过负载计时器的计数值未超过预设值PV，所以电源供应器并未关闭。于时间t5-t6，输出电流IO超过过负载线OLL使得过负载计时器启动计时，其中过负载计时器并于t6时计数至预设值PV，如此使得电源供应器因计数值达到预设值PV而关闭，也就是将输出电压VO降至0。FIG. 2 is used to illustrate the operation characteristics of a power supply in a conventional notebook computer. When the output current IO of the power supply exceeds an overload line OLL, the overload timer (such as a watchdog) will start timing, and when the load timer count value C1 exceeds the preset value PV, the power supply will will be closed. As shown in Figure 2, when the time t1-t2, because the output current IO does not exceed the overload line OLL, so the overload timer does not start timing. At the time t3-t4, the output current IO exceeds the overload line OLL OLL, so the overload timer starts timing until the output current IO drops below the overload line OLL; and because the count value of the overload timer does not exceed the preset value PV, the power supply is not turned off. At time t5-t6 , the output current IO exceeds the overload line OLL so that the overload timer starts counting, and the overload timer counts to the preset value PV at t6, so that the power supply is turned off because the count value reaches the preset value PV, and also It is to reduce the output voltage VO to 0.

由笔记型电脑的操作特性及系统规范来看，笔记型电脑突然增高的功率需求通常为一短暂时间，例如某一程序瞬间存取造成短时间内系统电源需求增加。传统上为了避免及减少电源供应器过负载的情况发生，因此所选用的电源供应器的额定输出功率(例如90瓦)都会高于一般系统操作时所需的功率需求(例如65瓦)。然而，大部分的时间系统并不需要使用到如此高的功率需求，使用额定输出功率过大的电源供应器将造成使用效能低落。再者，高额定功率输出的电源供应器通常意味比低额定功率输出的电源供应器体积来得大，这也造成设计上无法更轻薄短小。According to the operating characteristics and system specifications of the notebook computer, the sudden increase in power demand of the notebook computer is usually for a short period of time, for example, the instantaneous access of a certain program causes the system power demand to increase in a short period of time. Traditionally, in order to avoid and reduce the overload of the power supply, the rated output power of the selected power supply (for example, 90 watts) is higher than the power demand (for example, 65 watts) required by the general system operation. However, most of the time the system does not need to use such a high power requirement, and using a power supply with an excessively large rated output power will result in low performance. Furthermore, a power supply with a high rated power output usually means a larger volume than a power supply with a lower rated power output, which also makes the design impossible to be thinner and smaller.

发明内容 Contents of the invention

本发明的目的在于利用固定功率电源供应器与可充电电池同时对电子装置的核心系统进行供电，以避免当电子装置的所需功率暂时地大于电源供应器的最大输出功率所造成的系统效能下降问题。The purpose of the present invention is to use a fixed power power supply and a rechargeable battery to supply power to the core system of an electronic device at the same time, so as to avoid system performance degradation caused when the required power of the electronic device is temporarily greater than the maximum output power of the power supply question.

本发明提供一种电子系统，包括一固定功率电源供应器以及由固定功率电源供应器所供电的一电子装置。电子装置包括一核心系统、一可充电电池、一充电器以及一控制单元。核心系统用以控制电子装置的操作，而充电器，用以将固定功率电源供应器所提供的电源转换为一充电电源。控制单元用以当电子装置的一所需功率超过固定功率电源供应器所提供的一最大输出功率时，检测可充电电池的电量是否大于一第一预设值，并且当可充电电池的电量大于第一预设值时，使得可充电电池与固定功率电源供应器同时供电给核心系统。The invention provides an electronic system including a fixed power supply and an electronic device powered by the fixed power supply. The electronic device includes a core system, a rechargeable battery, a charger and a control unit. The core system is used to control the operation of the electronic device, and the charger is used to convert the power provided by the fixed power supply into a charging power. The control unit is used for detecting whether the power of the rechargeable battery is greater than a first preset value when a required power of the electronic device exceeds a maximum output power provided by the fixed power supply, and when the power of the rechargeable battery is greater than The first preset value enables the rechargeable battery and the fixed power supply to supply power to the core system at the same time.

本发明亦提供一种电源管理方法，适用于一固定功率电源供应器所供电的一电子装置，该电子装置包括一核心系统、一可充电电池、一充电器以及一控制单元。电源管理方法包括判断电子装置的一所需功率是否超过固定功率电源供应器所提供的一最大输出功率；当电子装置的所需功率超过固定功率电源供应器所提供的最大输出功率时，检测可充电电池的电量是否大于一第一预设值；以及当可充电电池的电量大于第一预设值时，使得可充电电池与固定功率电源供应器同时供电给核心系统。The present invention also provides a power management method suitable for an electronic device powered by a fixed power power supply. The electronic device includes a core system, a rechargeable battery, a charger and a control unit. The power management method includes judging whether a required power of the electronic device exceeds a maximum output power provided by the fixed power supply; when the required power of the electronic device exceeds the maximum output power provided by the fixed power supply, the detection may Whether the power of the rechargeable battery is greater than a first preset value; and when the power of the rechargeable battery is greater than the first preset value, the rechargeable battery and the fixed power supply supply power to the core system at the same time.

本发明亦提供一种电子装置，由一固定功率电源供应器所供电，并包括一核心系统、一可充电电池、一充电器以及一控制单元。核心系统用以控制电子装置的操作，而控制单元用以当电子装置的一所需功率超过固定功率电源供应器所提供的一最大输出功率时，检测可充电电池的电量是否大于一第一预设值，并且当可充电电池的电量大于第一预设值时，使得可充电电池与固定功率电源供应器同时供电给核心系统。The invention also provides an electronic device powered by a fixed power supply, and includes a core system, a rechargeable battery, a charger and a control unit. The core system is used to control the operation of the electronic device, and the control unit is used to detect whether the power of the rechargeable battery is greater than a first preset when a required power of the electronic device exceeds a maximum output power provided by a fixed power supply. set a value, and when the power of the rechargeable battery is greater than the first preset value, the rechargeable battery and the fixed power supply supply power to the core system at the same time.

由于电子装置突然增高的功率需求通常为一短暂时间，例如某一程序瞬间存取造成短时间内系统电源需求增加，故本发明的电子装置不需要因为突然增高的功率需求而降低效能。另一方面，由于可充电电池可提供电源功率因应这个突然增高的功率需求，所以固定功率电源供应器的额定输出功率可只要能因应电子装置一般操作时所需的功率需求即可。再者，由于低功率输出的电源供应器通常意味比高功率输出的电源供应器体积来得小，因此设计上亦可更轻薄短小。为了让本发明的上述和其他目的、特征、和优点能更明显易懂，下文特举一较佳实施例，并配合附图，作详细说明如下。Since the power demand of the electronic device suddenly increases for a short period of time, for example, the instantaneous access of a certain program causes the system power demand to increase in a short period of time, so the electronic device of the present invention does not need to reduce performance due to the sudden increase of power demand. On the other hand, since the rechargeable battery can provide power to meet the sudden increase in power demand, the rated output power of the fixed power power supply can only meet the power demand required by the normal operation of the electronic device. Furthermore, since a power supply with low power output generally means smaller volume than a power supply with high power output, the design can also be lighter, thinner and shorter. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, a preferred embodiment will be described in detail below together with the accompanying drawings.

附图说明 Description of drawings

图1用以说明传统笔记型电脑中的电源管理器的工作原理。Figure 1 is used to illustrate the working principle of the power manager in a traditional notebook computer.

图2用以说明传统笔记型电脑中的电源供应器的操作特性。FIG. 2 is used to illustrate the operation characteristics of a power supply in a conventional notebook computer.

图3为本发明所提供的电子系统的示意图。Fig. 3 is a schematic diagram of the electronic system provided by the present invention.

图4A为本发明的电子系统的另一示意图。FIG. 4A is another schematic diagram of the electronic system of the present invention.

图4B为本发明的电子系统的另一示意图。FIG. 4B is another schematic diagram of the electronic system of the present invention.

图5A为本发明的电子系统的另一示意图。FIG. 5A is another schematic diagram of the electronic system of the present invention.

图5B为本发明的电子系统的另一示意图。FIG. 5B is another schematic diagram of the electronic system of the present invention.

图6(a)至图6(d)用以说明图5A的电子装置500A操作时序图。6( a ) to FIG. 6( d ) are used to illustrate the operation timing diagram of the electronic device 500A in FIG. 5A .

图7用以说明本发明的固定功率电源供应器的操作特性。FIG. 7 is used to illustrate the operation characteristics of the fixed power power supply of the present invention.

上述附图中的附图标记说明如下：The reference numerals in the above-mentioned accompanying drawings are explained as follows:

50~电子系统；50~ electronic system;

100~固定功率电源供应器；100~ fixed power power supply;

200、200A、200B、500A、500B~电子装置；200, 200A, 200B, 500A, 500B~ electronic devices;

210~控制单元；210 ~ control unit;

211、510~电流检测器；211, 510~current detector;

212、530~嵌入式控制器；212, 530~embedded controller;

220、520~充电器；220, 520~ charger;

230、540~可充电电池；230, 540 ~ rechargeable battery;

240、550、590~开关；240, 550, 590~ switch;

250、560~核心系统；250, 560~ core system;

570~软启动元件；570~ soft start element;

PS~所需功率；PS~required power;

PA~输出功率；PA~ output power;

PB~功率；PB~power;

P1、P2~额定输出功率；P1, P2~ rated output power;

Vcs1~第二电压；Vcs1~second voltage;

V1~第一电压；V1~the first voltage;

Vcs~电压差；Vcs~ voltage difference;

IO~电流；IO~current;

VO~电压；VO~ voltage;

OLL~过负载线；OLL~overload line;

PV~预设值；PV~preset value;

C1~计数值；C1~count value;

Rcs~电阻。Rcs ~ resistance.

具体实施方式 Detailed ways

以下将详细讨论本发明各种实施例的装置及使用方法。然而值得注意的是，本发明所提供的许多可行的发明概念可实施在各种特定范围中。这些特定实施例仅用于举例说明本发明的装置及使用方法，但非用于限定本发明的范围。Devices and methods of use of various embodiments of the present invention are discussed in detail below. It should be noted, however, that the present invention provides many possible inventive concepts that can be implemented in various specific scopes. These specific examples are only used to illustrate the device and method of use of the present invention, but are not intended to limit the scope of the present invention.

图3为本发明所提供的电子系统的示意图。如图所示，电子系统50包括固定功率电源供应器100以及电子装置200，其中电子装置200包括控制单元210、充电器220、可充电电池230以及核心系统250。举例而言，本发明的核心系统250可包括处理单元、存储器、存储装置、输出装置、输入装置、通信装置，并使用总线将其连结在一起。换言之，本发明的电子装置200可为一电脑装置。除此之外，本领域普通技术人员也可将本发明的电子装置实施于其他电脑系统样态(configuration)上，例如多处理器系统、以微处理器为基础或可程序化的消费性电子产品(microprocessor-based or programmableconsumer electronics)、网络电脑、迷你电脑、大型主机、平板电脑、笔记型电脑以及类似的设备。举例而言，电子装置200为微处理器为基础或可程序化的消费性电子产品可包括手机、投影机、显示屏幕、个人数字助理(personaldigital assistant，PDA)、数字录影设备、数字音乐播放器等。处理单元可包含一单一中央处理单元(central-processing unit;CPU)或者是关连于平行运算环境(parallel processing environment)的多个平行处理单元。存储器包含只读存储器(read only memory，ROM)、闪存(flash ROM)以及/或随机存取存储器(random access memory，RAM)，用以存储可供处理单元执行的程序模块以及数据。一般而言，程序模块包含常序(routines)、程序(program)、物件(object)、元件(component)等，用以执行控制电子装置200的操作。Fig. 3 is a schematic diagram of the electronic system provided by the present invention. As shown in the figure, the electronic system 50 includes a fixed power supply 100 and an electronic device 200 , wherein the electronic device 200 includes a control unit 210 , a charger 220 , a rechargeable battery 230 and a core system 250 . For example, the core system 250 of the present invention may include a processing unit, a memory, a storage device, an output device, an input device, and a communication device, which are connected together by a bus. In other words, the electronic device 200 of the present invention can be a computer device. In addition, those skilled in the art can also implement the electronic device of the present invention on other computer system configurations, such as multi-processor systems, microprocessor-based or programmable consumer electronics Products (microprocessor-based or programmable consumer electronics), network PCs, mini PCs, mainframes, tablet PCs, notebook PCs, and similar devices. For example, the electronic device 200 is a microprocessor-based or programmable consumer electronic product, which may include mobile phones, projectors, display screens, personal digital assistants (personal digital assistants, PDAs), digital video equipment, digital music players wait. The processing unit may include a single central-processing unit (CPU) or a plurality of parallel processing units associated with a parallel processing environment (parallel processing environment). The memory includes read only memory (read only memory, ROM), flash memory (flash ROM) and/or random access memory (random access memory, RAM), which are used to store program modules and data that can be executed by the processing unit. Generally speaking, the program modules include routines, programs, objects, components, etc., and are used to execute and control the operation of the electronic device 200 .

在本发明的实施例中，固定功率电源供应器100用以接收一交流电源(例如市电)并转换成一直流电源，用以供应至充电器220及/或核心系统250。电子装置200耦接至固定功率电源供应器100，并可由固定功率电源供应器100所供电或由可充电电池220所供电。电子装置200可根据固定功率电源供应器100所提供的电源(例如电压及/或电流)，驱动核心系统250及/或对可充电电池220进行充电。In an embodiment of the present invention, the fixed power supply 100 is used to receive an AC power (such as commercial power) and convert it into a DC power for supplying to the charger 220 and/or the core system 250 . The electronic device 200 is coupled to the fixed power supply 100 and can be powered by the fixed power supply 100 or by the rechargeable battery 220 . The electronic device 200 can drive the core system 250 and/or charge the rechargeable battery 220 according to the power (such as voltage and/or current) provided by the fixed power supply 100 .

本发明的控制单元210用以当电子装置200的一所需功率超过固定功率电源供应器100所提供的一最大输出功率时，检测可充电电池230的电量是否大于一第一预设值，并且当可充电电池230的电量大于第一预设值时，驱使可充电电池230与固定功率电源供应器100同时供电给核心系统250。在一实施例中，电子装置200的所需功率为电子装置200的系统负载或核心系统250的系统负载，但不限定于此。再者，固定功率电源供应器100的最大输出功率亦可为固定功率电源供应器100的额定输出功率。举例而言，控制单元210可为一嵌入式控制器、一8051微处器或一控制器芯片，但不限定于此。本发明中的电子装置的所需功率超过固定功率电源供应器的最大输出功率发生于可程序瞬间存取或系统开机所造成的电源需求增加，但不限定于此。The control unit 210 of the present invention is used to detect whether the power of the rechargeable battery 230 is greater than a first preset value when a required power of the electronic device 200 exceeds a maximum output power provided by the fixed power power supply 100, and When the power of the rechargeable battery 230 is greater than the first preset value, the rechargeable battery 230 and the fixed power supply 100 are driven to supply power to the core system 250 at the same time. In one embodiment, the required power of the electronic device 200 is the system load of the electronic device 200 or the system load of the core system 250 , but is not limited thereto. Furthermore, the maximum output power of the fixed power power supply 100 may also be the rated output power of the fixed power power supply 100 . For example, the control unit 210 can be an embedded controller, an 8051 microprocessor or a controller chip, but not limited thereto. In the present invention, the required power of the electronic device exceeds the maximum output power of the fixed power supply due to the increase of power demand caused by program instant access or system startup, but is not limited thereto.

举例而言，控制单元210可检测固定功率电源供应器100的输出电流并产生相应于此输出电流的一第一电压，当此第一电压超过一第二电压时，则判定电子装置200的所需功率超过固定功率电源供应器100所提供的最大输出功率。当电子装置200的所需功率超过固定功率电源供应器100所提供的最大输出功率时，控制单元210可先控制充电器220减少或关闭可充电电池230的充电电流。若电子装置200的所需功率仍然超过固定功率电源供应器100所提供的最大输出功率，则会检测可充电电池230目前的电量。若可充电电池230目前的电量高于一第一预设值，控制单元210则会驱使可充电电池230与固定功率电源供应器100同时对核心系统230进行供电。For example, the control unit 210 can detect the output current of the fixed power power supply 100 and generate a first voltage corresponding to the output current. When the first voltage exceeds a second voltage, it is determined that the electronic device 200 is The required power exceeds the maximum output power provided by the fixed power power supply 100 . When the required power of the electronic device 200 exceeds the maximum output power provided by the fixed power supply 100 , the control unit 210 may first control the charger 220 to reduce or turn off the charging current of the rechargeable battery 230 . If the required power of the electronic device 200 still exceeds the maximum output power provided by the fixed power power supply 100 , the current power of the rechargeable battery 230 will be detected. If the current power of the rechargeable battery 230 is higher than a first preset value, the control unit 210 will drive the rechargeable battery 230 and the fixed power supply 100 to supply power to the core system 230 at the same time.

再者，若可充电电池230与固定功率电源供应器100同时供电后，电子装置200的所需功率仍然超过固定功率电源供应器100所提供的最大输出功率与可充电电池230输出之功率的功率总和，此时控制单元210送出一电源管理信号给核心系统250，以强制减低核心系统250的电源需求，直到电子装置200的所需功率低于固定功率电源供应器100所提供的最大输出功率与可充电电池230输出的功率的功率总和。减低核心系统250的电源需求的方式，举例而言，核心系统250根据控制单元210所送出的电源管理信号降低系统效能，例如处理器的操作频率及/或操作电压，但不限定于此。Furthermore, if the rechargeable battery 230 and the fixed power supply 100 supply power at the same time, the required power of the electronic device 200 still exceeds the maximum output power provided by the fixed power supply 100 and the output power of the rechargeable battery 230 In sum, at this time, the control unit 210 sends a power management signal to the core system 250 to forcibly reduce the power demand of the core system 250 until the required power of the electronic device 200 is lower than the maximum output power provided by the fixed power power supply 100 and The power sum of the power output by the rechargeable battery 230 . The way to reduce the power requirement of the core system 250 is, for example, the core system 250 reduces system performance, such as the operating frequency and/or operating voltage of the processor, according to the power management signal sent by the control unit 210 , but is not limited thereto.

在一实施例中，可充电电池230与固定功率电源供应器100同时对核心系统230进行供电之后，若可充电电池230的电量降至低于第一预设值时，控制单元210将停止可充电电池230对核心系统250进行供电。此时若电子装置200的所需功率仍然超过固定功率电源供应器100所提供的最大输出功率，则控制单元210传送电源管理信号给核心系统250，以强制减低核心系统250电源需求，使得电子装置200的所需功率降低至固定功率电源供应器100所提供的最大输出功率。其中第一预设值，举例而言，系为可充电电池230的充满电量的百分之80，但不限定于此。在某一实施例中，第一预设值为可充电电池230的充满电量的百分之70、90、85或60，但不限定于此。In one embodiment, after the rechargeable battery 230 and the fixed power supply 100 supply power to the core system 230 at the same time, if the power of the rechargeable battery 230 falls below a first preset value, the control unit 210 will stop The rechargeable battery 230 supplies power to the core system 250 . At this time, if the required power of the electronic device 200 still exceeds the maximum output power provided by the fixed power power supply 100, the control unit 210 sends a power management signal to the core system 250 to forcibly reduce the power demand of the core system 250, so that the electronic device The required power of 200 is reduced to the maximum output power provided by fixed power power supply 100 . Wherein the first preset value is, for example, 80% of the full charge of the rechargeable battery 230 , but is not limited thereto. In a certain embodiment, the first preset value is 70, 90, 85 or 60 percent of the full charge of the rechargeable battery 230 , but it is not limited thereto.

于另一实施例中，在可充电电池230与固定功率电源供应器100同时对核心系统230进行供电之后，当可充电电池230的电量降至低于第一预设值时，可充电电池230并不会有停止供电的动作，直到可充电电池电量降至低于一第二预设值时，控制单元210方会停止可充电电池230对核心系统230进行供电。此时若电子装置200的所需功率仍然超过固定功率电源供应器100所提供的最大输出功率，则控制单元210将传送电源管理信号给核心系统250，以强制降低核心系统250电源需求，使得电子装置200的所需功率降低至固定功率电源供应器100所提供的最大输出功率。在此实施例中，第二预设值低于第一预设值。举例而言，第一预设值为可充电电池230的充满电量的百分之80，第二预设值为可充电电池230的充满电量的百分之70，但不限定于此。如此一来，藉由第一预设值与第二预设值的设置，可避免可充电电池230电量处于第一预设值附近时，频繁地切换充电、放电的动作，进而避免降低可充电电池230的使用寿命。In another embodiment, after the rechargeable battery 230 and the fixed power supply 100 supply power to the core system 230 at the same time, when the power of the rechargeable battery 230 drops below the first preset value, the rechargeable battery 230 There is no action of stopping the power supply, and the control unit 210 stops the rechargeable battery 230 from supplying power to the core system 230 until the power of the rechargeable battery drops below a second preset value. At this time, if the required power of the electronic device 200 still exceeds the maximum output power provided by the fixed power power supply 100, the control unit 210 will send a power management signal to the core system 250 to forcibly reduce the power demand of the core system 250, so that the electronic The required power of the device 200 is reduced to the maximum output power provided by the fixed power power supply 100 . In this embodiment, the second preset value is lower than the first preset value. For example, the first preset value is 80% of the full charge of the rechargeable battery 230, and the second preset value is 70% of the full charge of the rechargeable battery 230, but not limited thereto. In this way, by setting the first preset value and the second preset value, it is possible to avoid frequent switching between charging and discharging when the power of the rechargeable battery 230 is near the first preset value, thereby avoiding a reduction in rechargeable battery capacity. The service life of the battery 230 .

在本发明中，由于固定功率电源供应器100的输出功率为一定值，所以当电子装置200的所需功率增加(亦即电流消耗增加)时，固定功率电源供应器100的输出电压就会下降。控制单元210可在固定功率电源供应器100的输出电压接近可充电电池230的电压时，驱使固定功率电源供应器100与可充电电池230以并联的方式对核心系统250进行供电。在一实施例中，本发明的可充电电池230是智能型电池，其具有一检测元件(gauge IC)用以检测可充电电池230的电量。再者，控制单元210、充电器220与可充电电池230藉由一总线(I2C或SM Bus)相连接，故控制单元210持续地得知可充电电池230目前的电量。In the present invention, since the output power of the fixed power power supply 100 is a certain value, when the required power of the electronic device 200 increases (that is, the current consumption increases), the output voltage of the fixed power power supply 100 will drop. . The control unit 210 can drive the fixed power supply 100 and the rechargeable battery 230 to supply power to the core system 250 in parallel when the output voltage of the fixed power supply 100 is close to the voltage of the rechargeable battery 230 . In one embodiment, the rechargeable battery 230 of the present invention is an intelligent battery, which has a detection element (gauge IC) for detecting the power of the rechargeable battery 230. Moreover, the control unit 210, the charger 220 and the rechargeable battery 230 are connected through a bus (I2C or SM Bus), so the control unit 210 continuously knows the current power of the rechargeable battery 230.

图7用以说明本发明之固定功率电源供应器的操作特性。由于固定功率电源供应器100的输出功率为定值，所以当电子装置200的所需功率(系统负载)增加时，固定功率电源供应器100的输出电流IO会上升，而输出电压VO会随之下降。当固定功率电源供应器100的输出电流IO超过一过负载线OLL时，过负载计时器会进行计时，若负载计时器的计数值C1超过预设值PV时，固定功率电源供应器100则会关闭。相反地，当负载计时器的计数值C1未超过预设值PV时，固定功率电源供应器100则不会关闭。FIG. 7 is used to illustrate the operation characteristics of the fixed power power supply of the present invention. Since the output power of the fixed power power supply 100 is a constant value, when the required power (system load) of the electronic device 200 increases, the output current IO of the fixed power power supply 100 will increase, and the output voltage VO will increase accordingly. decline. When the output current IO of the fixed power power supply 100 exceeds an overload line OLL, the overload timer will count, and if the count value C1 of the load timer exceeds the preset value PV, the fixed power power supply 100 will closure. On the contrary, when the count value C1 of the load timer does not exceed the preset value PV, the fixed power power supply 100 will not be turned off.

图4A为本发明的电子系统的另一示意图。如图所示，电子系统50包括固定功率电源供应器100以及电子装置200A，其中电子装置200A包括控制单元210、充电器220、可充电电池230、开关240及核心系统250。控制单元210包括电流检测器211及嵌入式控制器212。FIG. 4A is another schematic diagram of the electronic system of the present invention. As shown in the figure, the electronic system 50 includes a fixed power supply 100 and an electronic device 200A, wherein the electronic device 200A includes a control unit 210 , a charger 220 , a rechargeable battery 230 , a switch 240 and a core system 250 . The control unit 210 includes a current detector 211 and an embedded controller 212 .

电流检测器211用以检测固定功率电源供应器100所提供给电子装置200A的电流大小，依据电流大小产生相应的一第一电压V1，并将第一电压V1传送给嵌入式控制器212。嵌入式控制器212则依据第一电压V1大小进行对应的控制。举例而言，当流过电流检测器211的电流所产生的第一电压V1大于嵌入式控制器212内的一第二电压，若此时充电器220正对可充电电池230充电，则嵌入式控制器212将对充电器220送出控制信号，使得充电器220减少可充电电池230的充电电流或关闭充电器220。The current detector 211 is used to detect the magnitude of the current provided by the fixed power supply 100 to the electronic device 200A, generate a corresponding first voltage V1 according to the magnitude of the current, and transmit the first voltage V1 to the embedded controller 212 . The embedded controller 212 performs corresponding control according to the magnitude of the first voltage V1. For example, when the first voltage V1 generated by the current flowing through the current detector 211 is greater than a second voltage in the embedded controller 212, if the charger 220 is charging the rechargeable battery 230 at this time, the embedded The controller 212 will send a control signal to the charger 220 so that the charger 220 reduces the charging current of the rechargeable battery 230 or turns off the charger 220 .

此外，嵌入式控制器212亦会检测可充电电池230目前的电量。若关闭充电器220之后，第一电压V1仍高于第二电压，并且可充电电池230目前的电量高于第一预设值，则嵌入式控制器212将送出控制信号将开关240短路，使得可充电电池230与固定功率电源供应器100同时供电给核心系统250。In addition, the embedded controller 212 will also detect the current charge of the rechargeable battery 230 . If the first voltage V1 is still higher than the second voltage after the charger 220 is turned off, and the current power of the rechargeable battery 230 is higher than the first preset value, the embedded controller 212 will send a control signal to short-circuit the switch 240, so that The rechargeable battery 230 supplies power to the core system 250 simultaneously with the fixed power supply 100 .

若可充电电池230与固定功率电源供应器100同时供电给核心系统250，而第一电压V1仍大于第二电压时，则嵌入式控制器212发出电源管理信号至核心系统250，藉以降低电子装置200的功率需求。降低电子装置200的功率需求的方式，举例而言，包括降低中央处理器(CPU)运算速度。If the rechargeable battery 230 and the fixed power supply 100 supply power to the core system 250 at the same time, and the first voltage V1 is still greater than the second voltage, the embedded controller 212 sends a power management signal to the core system 250, thereby reducing the electronic device. 200 power requirements. The way to reduce the power requirement of the electronic device 200 includes, for example, reducing the computing speed of a central processing unit (CPU).

若电流检测器211所产生的第一电压V1小于第二电压，且此时可充电电池230并未对核心系统250供电，则表示电子装置200A之所需功率低于固定功率电源供应器100的最大输出功率的情况。嵌入式控制器212判断可充电电池230的电量是否饱和，若未饱和则嵌入式控制器220发出控制信号使得充电器220对可充电电池230进行充电。If the first voltage V1 generated by the current detector 211 is lower than the second voltage, and the rechargeable battery 230 is not supplying power to the core system 250 at this time, it means that the required power of the electronic device 200A is lower than that of the fixed power power supply 100 case of maximum output power. The embedded controller 212 determines whether the rechargeable battery 230 is saturated, and if not, the embedded controller 220 sends a control signal to make the charger 220 charge the rechargeable battery 230 .

于另一实施例中，若电流检测器211所产生的第一电压V1小于第二电压，且此时可充电电池230对核心系统250供电，则表示电子装置200A的所需功率低于固定功率电源供应器100与可充电电池230的输出功率总和。此时判断可充电电池230不供电给核心系统250时，固定功率电源供应器100的输出功率是否足够提供给核心系统250，若固定功率电源供应器100的输出功率足够提供给核心系统250，则可充电电池230不再供电给核心系统250，反之，若固定功率电源供应器100的输出功率不够提供给核心系统250，则可充电电池230继续供电给核心系统250。当可充电电池230未供电给核心系统250时，嵌入式控制器212判断可充电电池230的电量是否饱和，若未饱和则嵌入式控制器220发出控制信号使得充电器220对可充电电池230进行充电。In another embodiment, if the first voltage V1 generated by the current detector 211 is lower than the second voltage, and the rechargeable battery 230 supplies power to the core system 250, it means that the required power of the electronic device 200A is lower than the fixed power. The total output power of the power supply 100 and the rechargeable battery 230 . At this time, when it is judged that the rechargeable battery 230 does not supply power to the core system 250, whether the output power of the fixed power supply 100 is sufficient to provide the core system 250, if the output power of the fixed power supply 100 is sufficient to provide the core system 250, then The rechargeable battery 230 no longer supplies power to the core system 250 . On the contrary, if the output power of the fixed power supply 100 is not enough to supply the core system 250 , the rechargeable battery 230 continues to supply power to the core system 250 . When the rechargeable battery 230 is not supplying power to the core system 250, the embedded controller 212 judges whether the electric quantity of the rechargeable battery 230 is saturated, and if not saturated, the embedded controller 220 sends a control signal to make the charger 220 charge the rechargeable battery 230 Charge.

图4B为本发明的电子系统的另一示意图。如图所示，电子装置200B与图4A中的电子装置200A相似，其差异在于电子装置200B还包括一开关260，并且核心系统250固定功率电源供应器100通过充电器220进行供电。电子装置200B与电子装置200A相同之处，请参考图4A中的说明，于此不再累述。在本实施例中，充电器用以将固定功率电源供应器100所提供的电源(所输出的直流电压)转换成一充电电源(例如一充电电压)，并提供至可充电电池230及/或核心系统250。再者，开关240与260分别由嵌入式控制器212送出的一第一控制信号及一第二控制信号所控制。FIG. 4B is another schematic diagram of the electronic system of the present invention. As shown in the figure, the electronic device 200B is similar to the electronic device 200A in FIG. 4A , the difference is that the electronic device 200B further includes a switch 260 , and the core system 250 fixed power supply 100 is powered by the charger 220 . For the similarities between the electronic device 200B and the electronic device 200A, please refer to the description in FIG. 4A , which will not be repeated here. In this embodiment, the charger is used to convert the power (output DC voltage) provided by the fixed power supply 100 into a charging power (such as a charging voltage), and provide it to the rechargeable battery 230 and/or the core system 250. Moreover, the switches 240 and 260 are respectively controlled by a first control signal and a second control signal sent by the embedded controller 212 .

举例而言，当固定功率电源供应器100流过电流检测器211的电流所产生的第一电压V1大于嵌入式控制器212内的第二电压，则表示电子装置200的所需功率超过固定功率电源供应器100所提供的最大输出功率。若此时充电器220正对可充电电池230充电，则嵌入式控制器212送出第二控制信号至开关260，使得充电器220停止对可充电电池230进行充电。For example, when the first voltage V1 generated by the current flowing through the current detector 211 in the fixed power power supply 100 is greater than the second voltage in the embedded controller 212, it means that the required power of the electronic device 200 exceeds the fixed power. The maximum output power provided by the power supply 100 . If the charger 220 is charging the rechargeable battery 230 at this time, the embedded controller 212 sends a second control signal to the switch 260 so that the charger 220 stops charging the rechargeable battery 230 .

此外，嵌入式控制器212亦会检测可充电电池230目前的电量。若停止对可充电电池230进行充电之后，第一电压V1仍高于第二电压，并且可充电电池230目前的电量高于第一预设值，则嵌入式控制器212将送出第一控制信号将开关240短路，使得可充电电池230与充电器220同时供电给核心系统250。In addition, the embedded controller 212 will also detect the current charge of the rechargeable battery 230 . If the first voltage V1 is still higher than the second voltage after stopping charging the rechargeable battery 230, and the current power of the rechargeable battery 230 is higher than the first preset value, the embedded controller 212 will send a first control signal Shorting switch 240 allows rechargeable battery 230 and charger 220 to simultaneously power core system 250 .

若可充电电池230与充电器220同时供电给核心系统250，而第一电压V1仍大于第二电压时，则嵌入式控制器212发出电源管理信号至核心系统250，降低电子装置200B的功率需求。举例而言，降低电子装置200的功率需求的方式包括降低中央处理器的运算速度，但不限定于此。If the rechargeable battery 230 and the charger 220 supply power to the core system 250 at the same time, and the first voltage V1 is still greater than the second voltage, the embedded controller 212 sends a power management signal to the core system 250 to reduce the power demand of the electronic device 200B. . For example, the way to reduce the power requirement of the electronic device 200 includes reducing the computing speed of the central processing unit, but not limited thereto.

图5A为本发明的电子系统的另一示意图。如图所示，电子系统50包括固定功率电源供应器100以及电子装置500A，其中电子装置500A包括一软启动元件570、核心系统560、开关550、可充电电池540、嵌入式控制器530、充电器520及电流检测器510。软启动元件570(soft start)耦接于固定功率电源供应器100，经由核心系统560控制软启动元件570，使得固定功率电源供应器100的电流得以进入电流检测器510。FIG. 5A is another schematic diagram of the electronic system of the present invention. As shown in the figure, the electronic system 50 includes a fixed power supply 100 and an electronic device 500A, wherein the electronic device 500A includes a soft start element 570, a core system 560, a switch 550, a rechargeable battery 540, an embedded controller 530, a charging device 520 and current detector 510. The soft start element 570 (soft start) is coupled to the fixed power supply 100 , and the soft start element 570 is controlled through the core system 560 so that the current of the fixed power supply 100 can enter the current detector 510 .

在本实施例中，电流检测器510具有一电阻Rcs。当固定功率电源供应器100所提供的电流流经电阻Rcs时，在电阻Rcs的两端上会产生电压差Vcs。电压差Vcs会送至嵌入式控制器530，嵌入式控制器530依据电压差Vcs进行对应的控制。在本实施例中，电压差Vcs可为图3、4A、4B的实施例中的第一电压。In this embodiment, the current detector 510 has a resistor Rcs. When the current provided by the fixed power supply 100 flows through the resistor Rcs, a voltage difference Vcs is generated across the resistor Rcs. The voltage difference Vcs is sent to the embedded controller 530, and the embedded controller 530 performs corresponding control according to the voltage difference Vcs. In this embodiment, the voltage difference Vcs may be the first voltage in the embodiments shown in FIGS. 3 , 4A, and 4B.

举例而言，当电子装置500A所需功率高于固定功率电源供应器100的最大输出功率时，电阻Rcs所造成的电压差Vcs将高于嵌入式控制器530内的第二电压。若此时充电器520正对可充电电池540充电，则嵌入式控制器530将会发出控制信号给充电器520，减少充电电流或关闭充电器520。此外，嵌入式控制器530亦会检测可充电电池540目前的电量。For example, when the power required by the electronic device 500A is higher than the maximum output power of the fixed power power supply 100 , the voltage difference Vcs caused by the resistor Rcs will be higher than the second voltage in the embedded controller 530 . If the charger 520 is charging the rechargeable battery 540 at this time, the embedded controller 530 will send a control signal to the charger 520 to reduce the charging current or turn off the charger 520 . In addition, the embedded controller 530 will also detect the current charge of the rechargeable battery 540 .

关闭充电器520之后，若电阻Rcs上的电压差Vcs仍高于第二电压，并且可充电电池540目前的电量高于第一预设值，嵌入式控制器530送出第一控制信号将开关550短路，使得可充电电池540与固定功率电源供应器100同时供电给核心系统560。在可充电电池540与固定功率电源供应器100同时供电给核心系统560时，若电压差Vcs仍高于第二电压时，则嵌入式控制器530发出电源管理信号至核心系统560，降低电子装置500A的功率需求。举例而言，降低电子装置500A功率需求的方式包括降低中央处理器(CPU)运算速度。After the charger 520 is turned off, if the voltage difference Vcs on the resistor Rcs is still higher than the second voltage, and the current power of the rechargeable battery 540 is higher than the first preset value, the embedded controller 530 sends a first control signal to switch the switch 550 short circuit, so that the rechargeable battery 540 and the fixed power supply 100 supply power to the core system 560 at the same time. When the rechargeable battery 540 and the fixed power supply 100 supply power to the core system 560 at the same time, if the voltage difference Vcs is still higher than the second voltage, the embedded controller 530 sends a power management signal to the core system 560 to reduce the electronic device. 500A power requirement. For example, the way to reduce the power requirement of the electronic device 500A includes reducing the computing speed of the central processing unit (CPU).

图5B为本发明的电子系统的另一示意图。如图所示，电子装置200B与图5A中的电子装置500A相似，其差异在于电子装置500B还包括一开关590，并且核心系统560由固定功率电源供应器100通过充电器520进行供电。电子装置500B与电子装置500A相同之处，请参考图5A中的说明，于此不再累述。在本实施例中，充电器520用以将固定功率电源供应器100所提供的电源(所输出的直流电压)转换成一充电电源，并提供至可充电电池540及/或核心系统560。再者，开关550与590分别由嵌入式控制器530送出的第一、第二控制信号所控制。开关590用于关闭对可充电电池540的充电电流。FIG. 5B is another schematic diagram of the electronic system of the present invention. As shown, the electronic device 200B is similar to the electronic device 500A in FIG. 5A , the difference is that the electronic device 500B further includes a switch 590 , and the core system 560 is powered by the fixed power supply 100 through the charger 520 . For the similarities between the electronic device 500B and the electronic device 500A, please refer to the description in FIG. 5A , which will not be repeated here. In this embodiment, the charger 520 is used to convert the power (the output DC voltage) provided by the fixed power supply 100 into a charging power, and provide it to the rechargeable battery 540 and/or the core system 560 . Furthermore, the switches 550 and 590 are respectively controlled by the first and second control signals sent by the embedded controller 530 . The switch 590 is used to turn off the charging current to the rechargeable battery 540 .

举例而言，当电子装置500B的所需功率高于固定功率电源供应器100所提供的最大输出功率，电阻Rcs上的电压差Vcs将高于嵌入式控制器530内的第二电压。若此时充电器520正对可充电电池540充电，则嵌入式控制器530将会发出第二控制信号给开关590，使得充电器520停止对可充电电池540进行充电。此外，嵌入式控制器530亦会检测可充电电池540目前的电量。For example, when the required power of the electronic device 500B is higher than the maximum output power provided by the fixed power supply 100 , the voltage difference Vcs across the resistor Rcs will be higher than the second voltage in the embedded controller 530 . If the charger 520 is charging the rechargeable battery 540 at this time, the embedded controller 530 will send a second control signal to the switch 590 so that the charger 520 stops charging the rechargeable battery 540 . In addition, the embedded controller 530 will also detect the current charge of the rechargeable battery 540 .

在关闭开关590之后，若电阻Rcs上的电压差Vcs仍高于第二电压，并且可充电电池540目前的电量高于第一预设值，则嵌入式控制器530将送出控制信号将开关550短路，使得可充电电池540与充电器520同时供电给核心系统560。在可充电电池540与充电器520同时供电给核心系统560之后，若电压差Vcs仍高于第二电压时，则嵌入式控制器530发出电源管理信号至核心系统560，以降低电子装置500B的功率需求。举例而言，降低电子装置500B功率需求的方式包括降低中央处理器的运算速度。After closing the switch 590, if the voltage difference Vcs on the resistor Rcs is still higher than the second voltage, and the current power of the rechargeable battery 540 is higher than the first preset value, the embedded controller 530 will send a control signal to switch the switch 550 Short circuit, so that the rechargeable battery 540 and the charger 520 supply power to the core system 560 at the same time. After the rechargeable battery 540 and the charger 520 supply power to the core system 560 at the same time, if the voltage difference Vcs is still higher than the second voltage, the embedded controller 530 sends a power management signal to the core system 560 to reduce the power of the electronic device 500B. power requirements. For example, the way to reduce the power requirement of the electronic device 500B includes reducing the computing speed of the central processing unit.

图6(a)至图6(d)用以说明图5A的电子装置500A操作时序图。图6(a)用以说明电子装置500A的所需功率(系统负载)PS。图6(b)用以说明固定功率电源供应器100的输出功率PA。图6(c)用以说明可充电电池540所提供的功率PB。图6(d)用以说明电阻Rcs上的电压差Vcs。如图6(a)至图6(d)所示，时间t0~t2时为电子装置500A的所需功率(例如系统负载)PS低于固定功率电源供应器输出功率PA的情况。此时嵌入式控制器530可判断可充电电池540电量是否饱和，若未饱和，则可控制充电器520对可充电电池540进行充电。6( a ) to FIG. 6( d ) are used to illustrate the operation timing diagram of the electronic device 500A in FIG. 5A . FIG. 6(a) is used to illustrate the required power (system load) PS of the electronic device 500A. FIG. 6( b ) is used to illustrate the output power PA of the fixed power power supply 100 . FIG. 6( c ) is used to illustrate the power PB provided by the rechargeable battery 540 . Figure 6(d) is used to illustrate the voltage difference Vcs across the resistor Rcs. As shown in FIG. 6(a) to FIG. 6(d), the time t0~t2 is when the required power (eg system load) PS of the electronic device 500A is lower than the output power PA of the fixed power power supply. At this time, the embedded controller 530 can determine whether the rechargeable battery 540 is saturated, and if not, can control the charger 520 to charge the rechargeable battery 540 .

时间t2~t3时，电子装置500A的所需功率(系统负载)PS超过固定功率电源供应器100的额定输出功率P2。此时电阻Rcs上的电压差Vcs将大于嵌入式控制器530的第二电压Vcs1，故嵌入式控制器530于t3时送出控制信号使充电器520停止对可充电电池540进行充电。因此，电子装置500A的所需功率(系统负载)PS在时间t3~t4时下降，电流检测器510上的电压差Vcs亦随的小于第二电压Vcs1。时间t4~t5时，电子装置500A的所需功率(系统负载)PS小于固定功率电源供应器100的额定输出功率P2。During time t2˜t3, the required power (system load) PS of the electronic device 500A exceeds the rated output power P2 of the fixed power power supply 100 . At this time, the voltage difference Vcs across the resistor Rcs will be greater than the second voltage Vcs1 of the embedded controller 530 , so the embedded controller 530 sends a control signal at t3 to make the charger 520 stop charging the rechargeable battery 540 . Therefore, the required power (system load) PS of the electronic device 500A decreases at time t3˜t4, and the voltage difference Vcs on the current detector 510 is also smaller than the second voltage Vcs1 accordingly. During time t4˜t5, the required power (system load) PS of the electronic device 500A is less than the rated output power P2 of the fixed power power supply 100 .

时间t5~t6时，电子装置500A的所需功率(系统负载)PS超过固定功率电源供应器100额定输出功率，此时嵌入式控制器530会判断可充电电池540的电量。于此实施例中，可充电电池540的电量大于第一预设值，故嵌入式控制器530将开关550短路，使得可充电电池540与固定功率电源供应器100同时对核心系统560进行供电。At time t5˜t6, the required power (system load) PS of the electronic device 500A exceeds the rated output power of the fixed power power supply 100 , and the embedded controller 530 will determine the power of the rechargeable battery 540 at this time. In this embodiment, the charge of the rechargeable battery 540 is greater than the first preset value, so the embedded controller 530 short-circuits the switch 550 so that the rechargeable battery 540 and the fixed power supply 100 supply power to the core system 560 at the same time.

在某些实施例中，于可充电电池540对核心系统560进行供电之后，若可充电电池540的电量低于一第一预设置(例如一既定电量下限值)，嵌入式控制器530也会停止可充电电池540对核心系统560进行供电，并送出电源管理信号至核心系统560将强制减低核心系统560的中央处理器(CPU)或其他装置的电流消耗量直到电阻Rcs上的电压差Vcs小于第二电压Vcs1。In some embodiments, after the rechargeable battery 540 supplies power to the core system 560, if the power of the rechargeable battery 540 is lower than a first preset (such as a predetermined lower limit), the embedded controller 530 will also It will stop the rechargeable battery 540 from supplying power to the core system 560, and send a power management signal to the core system 560 to forcefully reduce the current consumption of the central processing unit (CPU) or other devices of the core system 560 until the voltage difference Vcs on the resistor Rcs less than the second voltage Vcs1.

时间t6~t10时，嵌入式控制器530的动作与时间t4~t6时相同，于此不再累述。在某些实施例中，核心系统内电源管理由南北桥芯片实现。在某一实施例中，核心系统内电源管理的功能亦可由嵌入式控制器530所实现。During the time t6-t10, the actions of the embedded controller 530 are the same as those during the time t4-t6, which will not be repeated here. In some embodiments, power management in the core system is implemented by north and south bridge chips. In one embodiment, the power management function in the core system can also be implemented by the embedded controller 530 .

总结来说，在停止充电器520对可充电电池540进行充电或减少可充电电池540的充电电流之后，若电子装置500A的所需功率(系统负载)PS仍超过固定功率电源供应器100的额定输出功率P2，相较于传统的作法，本发明中的嵌入式控制器530并不会马上发出电源管理信号来降低电子装置的效能，而是利用可充电电池540对核心系统560进行供电。In summary, after stopping the charger 520 to charge the rechargeable battery 540 or reducing the charging current of the rechargeable battery 540, if the required power (system load) PS of the electronic device 500A still exceeds the rated power of the fixed power power supply 100 The output power P2, compared with the traditional method, the embedded controller 530 in the present invention does not immediately send a power management signal to reduce the performance of the electronic device, but uses the rechargeable battery 540 to supply power to the core system 560 .

由于电子装置突然增高的功率需求通常为一短暂时间，例如某一程序瞬间存取造成短时间内系统电源需求增加，故本发明的电子装置不需要因为突然增高的功率需求而降低效能。另一方面，由于可充电电池540可提供电源功率因应这个突然增高的功率需求，所以固定功率电源供应器100的额定输出功率P2可只要能因应电子装置500A一般操作时所需的功率需求(例如65瓦)即可。Since the power demand of the electronic device suddenly increases for a short period of time, for example, the instantaneous access of a certain program causes the system power demand to increase in a short period of time, so the electronic device of the present invention does not need to reduce performance due to the sudden increase of power demand. On the other hand, since the rechargeable battery 540 can provide power to meet the suddenly increased power demand, the rated output power P2 of the fixed power power supply 100 can only meet the power demand required for the general operation of the electronic device 500A (for example, 65 watts) will suffice.

一般而言，公知笔记型电脑为了因应突然增高的功率需求，通常都会选用较大输出功率(例如90瓦)的电源供应器。然而，大部分的时间系统都不需要使用到如此高的功率需求，这将造成电源供应器的使用效能低落。相较于此，本发明的固定功率电源供应器的使用效能较佳。再者，由于低功率输出的电源供应器通常意味比高功率输出的电源供应器体积来得小，因此设计上亦可更轻薄短小。Generally speaking, in order to cope with a sudden increase in power demand, conventional notebook computers usually use a power supply with a relatively high output power (for example, 90 watts). However, most of the time the system does not need to use such a high power requirement, which will result in low performance of the power supply. Compared with this, the use efficiency of the fixed power power supply of the present invention is better. Furthermore, since a power supply with low power output generally means smaller volume than a power supply with high power output, the design can also be lighter, thinner and shorter.