1301343 «ι 九、發明說明： ^ 【發明所屬之技術領域】 本發明係關於一種充電模式控制電路及方法，特別係一種帶USB介面 - 的攜帶型設備的充電模式控制電路及方法。 ^ 【先前技術】 帶USB介面的攜帶型設備如掌上電腦等資訊存取量大、體積小、攜帶 方便，所以自其問世以來一直備受用戶青睞。為使攜帶型設備更好地便於用 戶使用，如帶電時間長，攜帶型設備一般都内置大容量的可充電電池，對於 可充電電池充電的充電模式，現有技術主要有以下兩種方案 方案一： 〃 籲 _外部錢触||將市電歸題整赫_壓之後給麟型設備提 供充電電源對可充電電池充電。採用這種充電模式的優點在於，只要有市電 的地方就可以直接利用適配器對攜帶型設備的可充電電池充電，而缺點在 於，在充電期間電腦和攜帶型設備不能藉由此充電介面進行資料交換。 乃系一· 利用USB介面將攜帶型設備與電腦相連，藉由USB介面為攜帶型設備 提供充電電麟可充f電池充電。採取這種充賴式在_帶型設備充電的 同時電礙口攜帶型設備之間還可以藉由USB匯流排進行資料交換，使用起 來十分方便’可按照USB U和USB 2.G的協議鮮，USB的每個埠的匯流 鲁 排供電容量被限制在2·5瓦（〇.5A @ +5V)以内，也就是說當USB介面提 供的充電電壓為+5V時，所能提供的充電電流最大不超過5〇〇mA，因而這 個較小的充電電流限制了攜帶型設備充電的速度。 σ 【發明内容】 基於上述原因，本發明提供一種充電模式控制方法，以根據不同的充電 電源選取械賊賴賴賴歧_可減池充電。 本發明另提供-種充賴式㈣電路，錄據不同的充電電源選取相鹿 的充電模式對可檇式設備的可充電池充電， 本U還&供-種充電模式控制裝置，以解決現有技術巾可檇式設備在 和電腦進行資料交換同時不能對其可充電電池快速充電的缺點。 本發明提供的充賴式控制方法包括步驟：過濾出充電電源輸出電壓中 1301343 的紋波訊號;整流該紋波訊號，並根據紋波訊號的大小輸出一個相應的波形 訊號，比較整流後的波形訊號與一參考電源所提供的參考訊號，並輸出一個 控制充電模式的控制訊號；根據上述訊號充電模式的控制訊號，對可充電電 池以相應充電模式進行充電。其中：所述的充電電源包括一電腦與一適配 裔、，所述充電模式包括一普通充電模式與一快速充電模式，所述外部電源 爲電細時，對可充電電池以普通充電模式充電，所述外部電源爲適配器時， 對可充電電池以快速充電模式充電。 本發明提供的充電模式控觀路包括：—濾波電路，祕减出充電電 源輸出電壓巾驗波訊號整流電路，麟對所麟波電路輸出的紋波訊 號進行整流’-比較電路’用於比較整流後的紋波和—參考電源所提供的參 考訊號，並輸出一個控制充電模式的控制訊號；及一充電控制電路，用於根1301343 «Immediate description of the invention: ^ Technical Field of the Invention The present invention relates to a charging mode control circuit and method, and more particularly to a charging mode control circuit and method for a portable device with a USB interface. ^ [Prior Art] Portable devices with a USB interface, such as a handheld computer, have a large amount of information, small size, and convenient portability, so they have been favored by users since its inception. In order to make the portable device more convenient for users, such as long charging time, the portable device generally has a built-in large-capacity rechargeable battery. For the charging mode of charging the rechargeable battery, the prior art mainly has the following two solutions:吁 _ _ external money touch | | will be the power supply to the whole _ _ pressure after the supply of charging power to the lining equipment to charge the rechargeable battery. The advantage of using this charging mode is that the rechargeable battery of the portable device can be directly charged by the adapter as long as there is a commercial power, and the disadvantage is that the computer and the portable device cannot exchange data through the charging interface during charging. . It is a one that uses a USB interface to connect the portable device to the computer, and provides a rechargeable battery pack for the portable device through the USB interface. By adopting this kind of charging type, while charging the _ belt type device, the data can be exchanged between the portable port-type devices through the USB bus, which is very convenient to use, and can be used according to the protocol of USB U and USB 2.G. The USB power supply capacity of each bus is limited to 2.5 watts (〇.5A @ +5V), which means that when the USB interface provides a charging voltage of +5V, the charging current can be supplied. The maximum does not exceed 5 mA, so this smaller charging current limits the speed at which the portable device can be charged. σ [Summary of the Invention] Based on the above reasons, the present invention provides a charging mode control method for selecting a thief to charge a battery according to different charging power sources. The invention further provides a charging circuit (four) circuit, which records different charging power sources and selects a charging mode of the deer to charge the rechargeable battery of the portable device, and the U also provides a charging mode control device to solve the problem. The prior art towel-type device has the disadvantage of not being able to quickly charge its rechargeable battery while exchanging data with the computer. The charging control method provided by the invention comprises the steps of: filtering out the ripple signal of 1301343 in the output voltage of the charging power source; rectifying the ripple signal, and outputting a corresponding waveform signal according to the magnitude of the ripple signal, comparing the rectified waveform The signal and a reference signal provided by the reference power source, and output a control signal for controlling the charging mode; and charging the rechargeable battery in the corresponding charging mode according to the control signal of the signal charging mode. Wherein: the charging power source comprises a computer and an adaptation, the charging mode comprises a normal charging mode and a fast charging mode, and when the external power source is electrically thin, the rechargeable battery is charged in a normal charging mode. When the external power source is an adapter, the rechargeable battery is charged in a fast charging mode. The charging mode control path provided by the invention comprises: a filter circuit, a secret reduction power supply output voltage wiper signal rectification circuit, and a rectification of the ripple signal output by the lining wave circuit for the ''comparison circuit' for comparison The rectified ripple and the reference signal provided by the reference power supply, and output a control signal for controlling the charging mode; and a charging control circuit for the root
據上述控制訊號，控制可充電電池的充電模式。其中：所述充電電源包括一 電腦及-適配H，所述濾、波電路包含—個電阻和—電容，所述電容與所述電 HE串接後接地’騎充電電源的輸㈣難電容的—端輸人，所述紋波 ，號從電容的另-端輸出至所述整流電路，所述比較電路包括一電壓比較 ，’其具第-輸入端、第二輸入端及一輸出端，第一輸入端與整流電路相連， 第二輸入端與參考電源树’辦端舰電鋪電路相連。 本發明提供誠賴式㈣裝置，包括-具杨輸人端與-輸出端的比 較電路，及-具有兩輸入端與一輸出端的充電控制電路，其中：所述充電模 = 還包括—轉接裝置，所述轉接裝置具有輸入介面與輸出介面，轉 ΐϋ所述輸人介面與—可作為充電電源的訊號處理設備相連，經由所 =^面=丨腳與-充電裝置及比較電路的第—輸人端、充電控制電路的 ΐ、表目連’所述比較電路㈣"輸人端連接至—參考電源，輸出 Λ電路的第二輸入端;及所述充電控制電路的輸出端連接至 亦、中斤述可作為充電電源的訊號處理設備包括電腦，所述 入端^C/DC適_，崎比較電耻較其f -輸人端與第二輸 號於充^制電較結果輪出控制可充電電池充電模式的控制訊 應的充電赋充電’，據ίΓΓ對可充電電池採取相 < G平乂兔路包含一電壓比較器。 柄月在不影響PC和可檇式設備之間進行資料交換的基礎上，相容了 1301343 術HI充賴細㈣練供了 —觀可料設備快速充電模 ί門Γ入2速充賴式時’只f要在可檇歧備和連接於《的連接線 之間加入一個V Ac/Dc適配器的轉接裝置，藉由適配器可 ====較大電流的充電電源，就可以使PC和可檇式設備之間: 貝—枓乂換的同時對可檇式設備快速充電’設計簡單易行，使用起來也很方便。 【貫施方式】 本餐關用充電電源中紋波訊號幅值的大小不同，過據出不同紋波;整流 此紋波^將整流後的電源賴與參考電職壓比較錄出_個波形訊號；此 波形訊號作爲充賴式的控伽號，決定對可充電電池採用相應的模b式充 % ° ^ 參閱第一圖，係本發明充電模式控制電路一具體應用的示意圖。在該具 體應用中，充電模式控制電路320與移轉接裝置40組成了一充電模式控制 裝置。充電模式控制電路320置於-齡型設備3〇卜以根據輸入=電 電源的不隨織帶型設備3G何充電電池31G的充電赋。《型役備 ，由轉接裝置40與-電腦職—AC/DC適配器物二=== 腦10之間進行資料交換的同時，從AC/DC適配器4 電流，以嫩輯對可細細充t。 攜帶型設備30藉由USB介面330與轉接裝置40的USB介面41〇相耦 接，轉接裝置40又藉由一 USB介面420與USB線纜50連接至電腦10的 USB介面11〇。該轉接裝置4〇還藉由具有兩線纜(未圖示）的電力線43〇耦 合至AC/DC適配器440。在該轉接裝置内部，USB介面420與USB介面 410的引腳除Vcc斷開外其他三個引腳Ground、D+和D-均爲直接搞合。電 力線430的兩線纜··電源線以及接地線分別與USB介面41〇的引腳以 及Ground相連接。因此，藉由轉接裝置4〇以及轉接裝置4〇與電腦ι〇及 AC/DC適配器440之間的連接，攜帶型設備30在無需終止與電腦1〇之間 進行資料交換的情況下，從AC/DC適配器44〇處獲得一個充電電流大於 500mA的充電電源以快速充電模式充電。在本發明的具體實施方式中，當 移走轉接裝置40後，電腦1〇的USB介面110和攜帶型設備3〇的USB介 面330藉由USB線纜50直接相連接時，電腦1〇可以給整合在攜帶型設備 3〇的充電模式控制電路320提供一個電壓爲5V最大電流不超過5〇〇mA的 1301343 充電電源’此時攜帶型設備可以實現在和電腦進行資料交換的同時以普通充 電模式充電。 參閱第二圖所示，係本發明充電模式控制電路一具體實施方式的電路 圖，包括：一高通濾波電路210、一整流電路220、一電壓比較電路230、 - 一充電控制電路240以及一可充電電池310。高通濾波電路210由一電容c 與一電阻R串聯組成，電容C的一端與攜帶型設備3〇的USB介面33〇的According to the above control signal, the charging mode of the rechargeable battery is controlled. Wherein: the charging power source comprises a computer and an adaptation H, the filter and wave circuit comprises a resistor and a capacitor, and the capacitor is connected to the electric HE and grounded to the ground. The input, the ripple, the output from the other end of the capacitor to the rectifier circuit, the comparison circuit includes a voltage comparison, 'having a first input terminal, a second input terminal, and an output terminal The first input end is connected to the rectifier circuit, and the second input end is connected to the reference power supply tree. The invention provides a (4) device, comprising: a comparison circuit with a Yang input end and an output end, and a charging control circuit having two input ends and an output end, wherein: the charging mode = further includes - an adapter device The switching device has an input interface and an output interface, and the input interface is connected to a signal processing device that can be used as a charging power source, via the ^^face=foot and the charging device and the comparison circuit. The output terminal of the input terminal, the charging control circuit, and the comparison circuit (four) " input terminal are connected to the reference power source, the second input terminal of the output port circuit; and the output end of the charging control circuit is connected to The signal processing device that can be used as the charging power source includes a computer, and the input terminal ^C/DC is suitable for _, and the comparison of the shame is compared with the f-input terminal and the second input signal in the charging system. The control charge of the rechargeable battery charging mode is controlled by the charge charging, and the phase of the rechargeable battery is included in the rechargeable battery. Based on the data exchange between PC and portable equipment, the handle month is compatible with 1301343. HI is full of fine (4) training and supply - view material equipment fast charging module ί Γ 2 2 2 2 2 2 At the time of 'only f, you need to add a V Ac/Dc adapter between the cables that can be connected and connected to the cable. With the adapter can ====high current charging power, you can make the PC Between the 和 and the 檇-type device: The 枓乂-枓乂 change and the quick charging of the 檇-type device are simple and easy to use, and are also convenient to use. [Common application method] The amplitude of the ripple signal in the charging power supply is different, and different ripples are generated; the ripple is rectified and the rectified power supply is compared with the reference voltage. The signal is used as a gamut control number, and the corresponding mode b is charged for the rechargeable battery. Referring to the first figure, it is a schematic diagram of a specific application of the charging mode control circuit of the present invention. In this particular application, charging mode control circuit 320 and shifting device 40 form a charging mode control device. The charging mode control circuit 320 is placed in the -age type device 3 to charge according to the input = electric power supply without the webbing type device 3G and the charging battery 31G. "Type of servant, by the transfer device 40 and - computer occupation - AC / DC adapter two === brain 10 exchange data, while AC / DC adapter 4 current, can be finely charged t. The portable device 30 is coupled to the USB interface 41 of the switching device 40 via the USB interface 330. The switching device 40 is further connected to the USB interface 11 of the computer 10 via a USB interface 420 and a USB cable 50. The switching device 4 is also coupled to the AC/DC adapter 440 by a power line 43A having two cables (not shown). Inside the switching device, the USB interface 420 and the USB interface 410 are disconnected from the Vcc pins, and the other three pins Ground, D+, and D- are directly engaged. The two cables of the power line 430, the power line and the ground line, are respectively connected to the pins of the USB interface 41A and the ground. Therefore, with the connection between the switching device 4〇 and the switching device 4〇 and the computer 〇 and the AC/DC adapter 440, the portable device 30 does not need to terminate the data exchange with the computer 1 ,, A charging power source having a charging current greater than 500 mA is obtained from the AC/DC adapter 44A to be charged in the fast charging mode. In the embodiment of the present invention, when the switching device 40 is removed, the USB interface 110 of the computer 1 and the USB interface 330 of the portable device 3 are directly connected by the USB cable 50, the computer 1 can be The charging mode control circuit 320 integrated in the portable device 3 is provided with a 1301343 charging power source with a voltage of 5V and a maximum current of not more than 5 mA. At this time, the portable device can realize normal charging while exchanging data with the computer. Mode charging. Referring to the second figure, a circuit diagram of a specific embodiment of the charging mode control circuit of the present invention includes: a high pass filter circuit 210, a rectifier circuit 220, a voltage comparison circuit 230, a charge control circuit 240, and a chargeable Battery 310. The high-pass filter circuit 210 is composed of a capacitor c and a resistor R in series. One end of the capacitor C is connected to the USB interface 33 of the portable device 3〇.
Vcc引腳相連，另一端經由電阻R接地。此外，電容c的另一端還連接至 整流電路220的輸入端。電壓比較電路23〇包括一電壓比較器，其一輸入端 連接至整流電路220的輸出端，另一輸入端與一參考電源Vref25〇相連， 輸出端連接至充電控制電路240的充電控制埠（CE—BAT) 234。充電控制 電路240的充電電源埠（vinl) 232亦與攜帶型設備3〇的USB介面330的The Vcc pin is connected and the other end is grounded via a resistor R. Further, the other end of the capacitor c is also connected to the input terminal of the rectifier circuit 220. The voltage comparison circuit 23A includes a voltage comparator having an input terminal connected to the output terminal of the rectifier circuit 220, another input terminal connected to a reference power source Vref25A, and an output terminal connected to the charge control circuit of the charge control circuit 240 (CE) —BAT) 234. The charging power supply 埠 (vinl) 232 of the charging control circuit 240 is also connected to the USB interface 330 of the portable device 3
Vcc^引腳相連，其充電埠（BAT) 236與待充電的可充電電池31〇相連。 南通;慮波電路210過遽從USB介面330的Vcc引腳輸出的電壓vin後， 輸出一電壓Voutl至整流電路220，整流電路22〇將電壓v〇utl整流後輸出 =電壓Vout2至電壓比較電路230。電壓比較電路230將電壓Vout2與參考 電源Vref 250所提供的電壓值比較，輸出一電壓訊號v〇ut3至充電控制電 路=4〇的充電控制埠234，充電控制電路240根據該電壓訊號v〇ut3自動控 制攸充電電源埠232流入的充電電源電流的大小，從而控制可充電電池31〇 的充電模式。 # 從USB介面33〇的Vcc引腳輸出的電壓Vin中，包含有直流電壓、低 頻交，電壓與高頻交流賴三大部分，高頻滤波電路加過滤掉直流電壓與 低頻交流電壓部分，過滤出高頻交流電壓即具相應幅值的紋波訊號部分 1〇此。在具體應用巾，由於從AC/DC適配器與從電腦ι〇經由湖 ^面330的Vcc引腳輸出的電壓vin的純潔度不同，因而過濾出的紋波訊 號Voutl的幅值也不同。通常，從AC/DC適配器44〇經usb介面33〇的The Vcc^ pin is connected, and its charging port (BAT) 236 is connected to the rechargeable battery 31〇 to be charged. Nantong; the wave circuit 210 passes through the voltage vin output from the Vcc pin of the USB interface 330, and outputs a voltage Vout1 to the rectifier circuit 220. The rectifier circuit 22 整流 rectifies the voltage v〇utl and outputs the voltage Vout2 to the voltage comparison circuit. 230. The voltage comparison circuit 230 compares the voltage Vout2 with the voltage value provided by the reference power source Vref 250, and outputs a voltage signal v〇ut3 to the charging control circuit=4〇 charging control unit 234, and the charging control circuit 240 according to the voltage signal v〇ut3 The charging power source current flowing into the charging power port 232 is automatically controlled to control the charging mode of the rechargeable battery 31〇. # The voltage Vin output from the Vcc pin of the USB interface 33〇 contains DC voltage, low frequency AC, voltage and high frequency AC. The high frequency filter circuit filters out the DC voltage and low frequency AC voltage. The high-frequency AC voltage is the ripple signal portion with the corresponding amplitude. In the specific application towel, since the purity of the voltage vin output from the AC/DC adapter and the Vcc pin from the computer through the lake surface 330 is different, the amplitude of the filtered ripple signal Voutl is also different. Typically, from the AC/DC adapter 44 via the usb interface 33〇
Vcc引腳輸出的電壓Vin經過·所得的紋波訊號最大幅值偏會大於 期mV ’而從電腦1〇、經USB介面33〇的Vcc引腳輸出的電壓偷經過濾 後所得的紋波訊號最大幅值Vm2會小於7〇〇mV。 咼頻，波電路210輸出紋波訊號Voutl進入整流電路22〇。此整流電路 220可以是半橋式或者全橋式整流電路，其糊元件可以鱗二極體或鍺二 1301343 ^體’或其他類型二極體。例如採用錯二極體組成的半橋式整流電路，假設、 從A=/DC適配器440、經USB介面330的VCC引腳輸出的電麼vin經過濾 後所得的紋波减最大幅值vmi爲5GGmV，而從電腦⑴經uSB介面33〇 的Vcc引腳輸出的電麼Vm經過滤後所得的紋波訊號最大幅值伽^爲 版V由於石夕整流電路中石夕管的導通屡降爲3〇OmV，因此當輸入的紋波訊 ，Voutl最大巾田值爲Vml時’紋波訊號中幅值介於3〇〇mV和5〇〇mV的電 $波开7將被整如來，輸出—電壓最大幅值爲2⑻解的電壓波形v〇ut2 ; 當輸入的紋波訊號Voutl最大幅值50mV時，輸出的電壓波形v〇ut2將是一 個持續的低電平。 電壓比較電路230將電壓Vout2與參考電源Vref 25〇所提供的電壓值相 比較後，輸出一個相對應的電壓訊號v〇ut3。在本發明的具體實施方式中， 參考電源Vref 25〇的電壓值介於整流後輸出的兩個電壓ν_2的最大幅值 之間，例如設置參考電源Vref 25〇所提供的電壓值爲1〇〇mV，當電壓比較 電^230輸入的電壓Vout2波形爲一持續的低電平時，其輸出乂祕也爲一 持績的低電平鐵，當其輸入的v〇ut2爲一最大幅值是2〇〇mV的電壓波形 訊號時，其輸出電壓Vout3波形爲一系列矩形波。 電壓比較電路230輸出的波形訊號Vout3被輸入至電控制電路24〇的充 電控制埠234作爲其選擇充電模式的控制訊號。當充電控制電路23〇接受的 控制訊號Vout3爲系列矩形波時，充電控制電路23〇自動識別充電電源來自 AC/DC適配器440，從而決定對可充電電池310採取充電電流大於5〇〇mA ，陕速充電模式進行充電，當充電控制電路230接受的控制訊號v〇ut3爲持 續低電平時，充電控制電路23〇自動識別充電電源來自電腦1〇，從而決定 對可充電電池310採取充電電流小於500mA的普通充電模式進行充電。 本發明關於電壓比較電路230的參考電壓Vref不限於1〇〇mV，根據輸 入的具體的充電電源不同，Vref的電壓值只要介於整流後輸出的兩個電壓 的最大幅值之間就可以實現電壓的比較。 以上說明的具體實施例僅為範例。熟知此技術者可對特定的具體實施例 進行變更、修改及變動，而不脫離完全由所附權利要求所定義的本發明的範 疇。 又 【圖式簡單說明】 1301343 第一圖係本發明充電模式控制電路一具體應用的示意圖。 第二圖係本發明充電模式控制電路的一具體實施方式的電路圖 【主要元件符號說明】The voltage Vin output from the Vcc pin is over. The maximum amplitude of the ripple signal is greater than the period mV', and the ripple signal is filtered from the voltage output from the computer 1〇 and the Vcc pin via the USB interface 33〇. The maximum value Vm2 will be less than 7〇〇mV. At the frequency, the wave circuit 210 outputs the ripple signal Vout1 to the rectifier circuit 22A. The rectifying circuit 220 can be a half-bridge or full-bridge rectifying circuit, and the paste element can be a scale diode or a 1301313 body or other type of diode. For example, a half-bridge rectifier circuit composed of a faulty diode is assumed, and the maximum amplitude vmi of the ripple obtained by filtering from the A=/DC adapter 440 and the VCC pin of the USB interface 330 is filtered. 5GGmV, and the output of the ripple signal from the Vcc pin of the computer (1) via the uSB interface 33〇 is the maximum amplitude of the ripple signal. The V is reduced to 3 due to the conduction of the Shixi tube in the Shixi rectifier circuit. 〇OmV, so when the input ripple signal, Voutl maximum towel field value is Vml, 'the amplitude of the ripple signal is between 3〇〇mV and 5〇〇mV. The wave wave 7 will be finished, the output— The voltage waveform with the maximum amplitude of 2(8) is v〇ut2; when the input ripple signal Voutl has a maximum amplitude of 50mV, the output voltage waveform v〇ut2 will be a continuous low level. The voltage comparison circuit 230 compares the voltage Vout2 with the voltage value supplied from the reference power source Vref 25A, and outputs a corresponding voltage signal v〇ut3. In a specific embodiment of the present invention, the voltage value of the reference power source Vref 25〇 is between the maximum amplitudes of the two voltages ν_2 output after the rectification, for example, the voltage value provided by the reference power source Vref 25〇 is set to 1〇〇. mV, when the voltage comparison voltage of the input voltage Vout2 is a continuous low level, its output secret is also a low-level iron of the performance, when its input v〇ut2 is a maximum amplitude is 2 When the voltage waveform signal of 〇〇mV is used, the output voltage Vout3 is a series of rectangular waves. The waveform signal Vout3 output from the voltage comparison circuit 230 is input to the charge control unit 234 of the electric control circuit 24 as the control signal for selecting the charging mode. When the control signal Vout3 received by the charging control circuit 23 is a series of rectangular waves, the charging control circuit 23 automatically recognizes that the charging power source is from the AC/DC adapter 440, thereby determining that the charging current of the rechargeable battery 310 is greater than 5 mA. The charging mode is charged. When the control signal v〇ut3 received by the charging control circuit 230 is continuously low, the charging control circuit 23 automatically recognizes that the charging power is from the computer 1〇, thereby determining that the charging current of the rechargeable battery 310 is less than 500 mA. The normal charging mode is charged. The reference voltage Vref of the voltage comparison circuit 230 of the present invention is not limited to 1 〇〇 mV, and depending on the specific charging power source input, the voltage value of Vref can be realized as long as it is between the maximum amplitudes of the two voltages output after rectification. Comparison of voltages. The specific embodiments described above are merely examples. A person skilled in the art can make variations, modifications, and variations to the specific embodiments without departing from the scope of the invention as defined by the appended claims. [Simplified illustration] 1301343 The first figure is a schematic diagram of a specific application of the charging mode control circuit of the present invention. The second figure is a circuit diagram of a specific embodiment of the charging mode control circuit of the present invention.
電腦 10 USB介面 110 攜帶型設備 30 可充電電池 310 充電模式控制電路 320 USB介面 110 ， 330 ， 410 ， 420 轉接裝置 40 電力線 430 AC/DC適配器 440 USB線纜 50 高通濾波電路 210 整流電路 220 電壓比較器 230 充電电源埠 232 充電控制埠 234 充電埠 236 充電控制電路 240 參考電源 250 11Computer 10 USB interface 110 Portable device 30 Rechargeable battery 310 Charging mode control circuit 320 USB interface 110, 330, 410, 420 Adapter 40 Power line 430 AC/DC adapter 440 USB cable 50 High-pass filter circuit 210 Rectifier circuit 220 Voltage Comparator 230 Charging Power Supply 埠 232 Charging Control 埠 234 Charging 埠 236 Charging Control Circuit 240 Reference Power Supply 250 11