130134 九、； €明說明 【發明所屬之技術領域】 本發明係-種充電模式控制方法、電路及可充電模式 備，特別係鮮USBh的賴式設備的充賴式㈣方^電式^ 【先前技術】 帶USB介面的可檇式設備如掌上電腦等資訊存取量大、體積小 2 ’所以自，世，來-直備受用戶青睞。為使可檇式設備更好‘於 用戶使用，使其帶電時間長，可赋設備—般都内置大容量的可充電電池， 對於可充電電池充電的充賴式，現有技術主要有町兩種方案。 方案一： 利用外部直流適配裝置將市電經過變壓整流濾波穩壓之後給可檇式設 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了只要 有市電的地方就可以直接_適配裝置對可檇式設備的可充電電池充電， 而缺點在於，在充電期間可檇式設備和電腦等通信設備之間不能通過此充 電介面進行資料交換。 方案二：130134 九;; € 明说明 [Technical field of invention] The present invention is a charging mode control method, circuit and rechargeable mode preparation, especially for the fresh USBh Lai-type device (4) square ^ electric type ^ [ Prior Art] A portable device with a USB interface, such as a palmtop computer, has a large amount of information access and a small size 2', so it is favored by users. In order to make the squat-type device better, it can be used for a long time, and the device can be equipped with a large-capacity rechargeable battery. For the rechargeable battery charging, the existing technology mainly has two types of equipment. Program. Solution 1: The external DC adapter is used to charge the rechargeable battery to the rechargeable battery after the commercial power is regulated by the transformer. The advantage of adopting this charging mode is that the rechargeable battery of the portable device can be directly charged as long as there is a commercial power, and the disadvantage is that between the portable device and the communication device such as the computer during charging. Data exchange cannot be performed through this charging interface. Option II:
9f· |·— 曰I正雜頁 利用USB介面將可檇式設備與電腦等通訊設備相連，通過USB介面對 可檇式設備内可充電電池充電。採取這種充電模式在對可檇式設備充電的 同時可檇式設備與通訊設備之間還可以通過USB匯流排進行資料交換，使 用起來十分方便，可按照USB 1.1和USB 2.0的協議標準，USB每個埠的 匯流排供電容量被限制在2.5瓦（0.5A @+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500mA，因 而這個較小的充電電流限制了可檇式設備充電的速度。 【發明内容】 有鑒於此’有必要提供一種充電模式控制方法，以根據不同的充電電 源選取相應的充電模式對可檇式設備的可充電池充電，以使可檇式設備在 與通gfU免備通訊的同時能對其内的可充電電池快速充電。 有鑒於此，另提供一種充電模式控制電路，以根據不同的充電電源選 取相應的充電模式對可檇式設備的可充電池充電，以使可檇式設備在與通 訊設備通訊的同時能對其内的可充電電池快速充電。 6 1301345 有鑒於此，還提供_種可進行充魏讀制的 =:峨備在和電腦進行資料細時不能對其 、尚㈣種ίίϊ，制方法’用於控制可充電電池的充電模式，包括步驟： :ίί:ΪΓ 紋波信號;比較紋波信號與一參考電源所輸出的來 七波形信號；積分該波形信號後輸出一個控制信號；根據此 破’決疋可充電電池的充賴式。其中所述充電電源包括—通 備與-細己裝置，述充電模式包括_普通充電模式與—快速充電模^ 當過滤出的紋波信號霞幅值小於參考信號的電壓幅值時以普通充電模式 出的紋波信號的電壓幅值大於參考信號的電壓幅值_ 罾 —種充賴式控制電路，控射充電電池的充f模式，所述充電 模式㈣電路包括··—濾波魏，韻出充㈣源巾敝波信號；一 比車乂電路’麟比較紋波健和—參考電源所輸出的參考錢並輸出一波 形信號；-積分電路，驗積分此波形信號並輸出一控制信號；一充電控 制電路用於根據積分電路輸出的控制信號控制可充電電池的充電模式。 其中’充電電源包括-通訊設備及—適配裝置。比較電路包括—比較器、 ^了參考信號產生電路，比較ϋ包括—參考信號輸人端、波信號輸入 端^及-輸出端。參考信號輸入端與參考信號產生電路相連，紋波信號輸 入端與濾波電路相連，輸出端與積分電路相連。此外，參考信號產生電路 _ j接至參考電源，為比健提供參考信號。所述充電控制電路包括一電源 介面，直接與充電電源，一充電控制介面，與積分電路相連，以及一輸出 介面，與充電電池相連。 一種可進行充電模式控制的可檇式設備，其包括有一通用串列匯流排 界面及一可充電電池，所述可檇式設備可通過所述通用串列匯流排界面接 叉連接於一轉接裝置的充電電源充電。所述可檇式設備還包括有一充電模 式控制電路，所述充電模式控制電路包括··一濾波電路，用於過濾出所述 充電電源的紋波信號；一比較電路，用於比較該紋波信號幅值與一參考電 源輸出的參考信號的幅值，並根據比較結果輸出一波形信號；一積分電路， 用於積分該波形信號並輸出一控制信號；一充電控制電路，用於根據該控 制#號對所述可充電電池採取相應的充電模式充電。 7 潜換頁 1301345 她于現有麵，所述充f模讀财法、電路及裝腦 等通訊設備和可檇式設備之間進行資料交換的基礎上，相容了現有技術的 普通充電模式的同時還提供了-觀可檇式設備快速充賴式。採用這種 • 快速充龍式時，只需要在可檇式設備和連接于《的^接線之間加入一 • 個連接至AC/DC適配裝置的轉接裝置，通過該AC/DC適配裝置可以為充 電模式控制電路提供-錄大冑触域冑源，就可贿軌設備和可檇 式设備之間進行資料交換的同時對可檇式設備快速充電，使用起來很方便。 【實施方式】 本實施方式根據利用充電電源中紋波電壓幅值的大小不同，過濾出不 同紋波，將此紋波與參考電源比較後輸出一波形信號；將此波形信號積分 後作為充電模式的控制信號，決定對可充電電池採用相應的模式充電。 參閱第一圖，是充電模式控制電路一具體應用的示意圖。在該具體應 用中，本實施例中的充電模式控制電路32〇置於一可檇式設備3〇中，以根 據輸入的充電電源的不同控制可檇式設備3〇中可充電電池33〇的充電模 式。可檇式設備30通過一轉接裝置20與一通訊設備（第一圖中具體例舉 為一電腦10)及一 AC/DC適配裝置40相連，以便在和電腦1〇之間進行資 料交換的同時，從AC/DC適配裝置40處獲取較大的充電電流，對可充電 電池330以快速充電模式充電。9f· |·— 曰I正杂页 Use the USB interface to connect the portable device to a communication device such as a computer, and charge the rechargeable battery in the portable device through the USB device. This charging mode can be used to charge the portable device. The USB device can also exchange data through the USB bus. It is very convenient to use. It can be used according to the USB 1.1 and USB 2.0 protocol standards. Each bus's bus capacity is limited to 2.5 watts (0.5A @+5V), which means that when the USB interface provides a charging voltage of +5V, the maximum charging current can be no more than 500mA, so this The smaller charging current limits the speed at which the portable device can be charged. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a charging mode control method to select a charging mode according to different charging power sources to charge the rechargeable battery of the portable device, so that the portable device is free from the gfU. The communication can quickly charge the rechargeable battery inside. In view of this, another charging mode control circuit is provided to select a charging mode according to different charging power sources to charge the rechargeable battery of the portable device, so that the portable device can communicate with the communication device while communicating with the communication device. The rechargeable battery inside is quickly charged. 6 1301345 In view of this, it is also provided that _ can be used for reading and writing system =: 峨 在 在 和 和 和 和 和 和 和 和 和 和 和 和 和 和 和 和 和 和 和 和 电脑 电脑 电脑 电脑 电脑 电脑 电脑 电脑 电脑 电脑 电脑 电脑 电脑 电脑 电脑The method includes the steps of: ίί: 纹 ripple signal; comparing the ripple signal with a reference waveform outputted by a reference power source; integrating the waveform signal and outputting a control signal; according to the breaking of the rechargeable battery . The charging power source includes: a general-purpose and a fine-packing device, and the charging mode includes a normal charging mode and a fast charging mode. When the filtered ripple signal has a magnitude smaller than a voltage amplitude of the reference signal, the charging is performed. The voltage amplitude of the ripple signal of the mode is greater than the voltage amplitude of the reference signal _ 罾 a kind of charging control circuit, the charging mode of the control charging battery, the charging mode (four) circuit includes ··-filtering Wei, rhyme The charging (4) source towel chopping signal; one is compared with the rutting circuit 'Lin's ripple-health--reference power outputted by the reference power supply and outputs a waveform signal; - an integration circuit that integrates the waveform signal and outputs a control signal; A charging control circuit is configured to control a charging mode of the rechargeable battery according to a control signal output by the integrating circuit. Where 'rechargeable power supply includes - communication equipment and - adapter. The comparison circuit includes a comparator, a reference signal generation circuit, and a comparison signal including a reference signal input terminal, a wave signal input terminal, and an output terminal. The reference signal input terminal is connected to the reference signal generating circuit, the ripple signal input end is connected to the filter circuit, and the output end is connected to the integration circuit. In addition, the reference signal generating circuit _j is connected to the reference power source to provide a reference signal for the comparator. The charging control circuit includes a power supply interface directly connected to the charging power source, a charging control interface, and an integrating circuit, and an output interface connected to the rechargeable battery. A portable device capable of charging mode control, comprising a universal serial bus interface and a rechargeable battery, wherein the portable device can be connected to a switch through the universal serial bus interface interface The charging power of the device is charged. The portable device further includes a charging mode control circuit, the charging mode control circuit includes: a filtering circuit for filtering out a ripple signal of the charging power source; and a comparing circuit for comparing the ripple The amplitude of the signal and the amplitude of the reference signal output by a reference power supply, and output a waveform signal according to the comparison result; an integrating circuit for integrating the waveform signal and outputting a control signal; and a charging control circuit for controlling according to the control The ## charges the rechargeable battery in the corresponding charging mode. 7 潜换换1301345 On the basis of the existing information, the data exchange between the communication device, circuit and brain-loading communication equipment and the portable device is compatible with the common charging mode of the prior art. It also provides a fast-recovery device. With this • fast charging type, it is only necessary to add a switching device connected to the AC/DC adapter between the portable device and the ^ wiring, through which the AC/DC adapter is adapted. The device can provide a charging mode control circuit to record the contact area source, and can exchange the data between the bribe device and the portable device, and quickly charge the portable device, which is convenient to use. [Embodiment] In the present embodiment, different ripples are filtered according to the magnitude of the ripple voltage in the charging power source, and the ripple is compared with the reference power source to output a waveform signal; the waveform signal is integrated as a charging mode. The control signal determines the charging of the rechargeable battery in the corresponding mode. Referring to the first figure, it is a schematic diagram of a specific application of the charging mode control circuit. In this specific application, the charging mode control circuit 32 of the present embodiment is placed in a portable device 3A to control the rechargeable battery 33 in the portable device 3 according to the input charging power. Charging mode. The portable device 30 is connected to a communication device (specifically, a computer 10 in the first figure) and an AC/DC adapter device 40 through a switching device 20 for data exchange with the computer. At the same time, a larger charging current is taken from the AC/DC adapter 40, and the rechargeable battery 330 is charged in the fast charging mode.
可檇式没備30通過通用串列匯流排（Universal Serial Bus，USB)介面 310與轉接裝置20的USB介面220相耦接，轉接裝置20又通過另一 USB 介面210與USB線纜50連接至電腦1〇的USB介面11〇。該轉接裝置2〇 還通過線纜61與62連接至AC/DC適配裝置40。在該轉接裝置20内部， USB介面210與USB介面220的引腳除Vex斷開外其他三個引腳G賺nd、 D+和D-均為直接耦合。線纜61與62分別與USB介面220的引腳GlOUnd 以及Vcc相連接。因此，通過轉接裝置2〇與電腦1〇及AC/DC適配裝置40 的連接，可檇式設備30在無需終止與電腦10之間進行資料交換的情況下， 可以從AC/DC適配裝置40處獲得大於500mA的充電電流以快速充電模式 對可充電電池330充電。在具體實施例中，當移走轉接裝置2〇後，電腦1〇 的USB介面110和可檇式設備3〇的USB介面310通過USB線繞50直接 相連接時，電腦10可以給整合在可檇式設備3〇内的充電模式控制電路32〇 k供個電壓為(5+5%)V隶大電流不超過500mA的充電電源，此時可搞式 8 Γ301345 「7]日^^ ♦設備30可以在和電腦進行資料交換的同時以普通充電模式 參閱第二圖’是本實施例中充電模式控制電路一具體電路圖，包括： 一濾、波電路321、一保護電路325、一比較電路322、一積分電路323、一 • 充電控制電路324及一可充電電池330。濾波電路321由一串聯電阻iu、 電谷C1 (下間稱為串聯電阻電容”）與一並聯電阻R2、電容C2 (下簡 稱為“並聯電阻電容”）組成，串聯電阻電容的一端經由一二極體〇4後與 可檇式設備30的USB介面310的Vccl引腳相連，另一端經由並聯電阻電 容後接地。此外，串聯電阻電容與並聯電阻電容的串接處（第二圖中所示& 點）還分別連接至保護電路325和比較電路322的一正相輸入端。保護電 路325由一串聯的《一極體Dl、D2及"串聯的電阻R5、電容C4組成，二The portable device 30 is coupled to the USB interface 220 of the switching device 20 through a Universal Serial Bus (USB) interface 310, and the switching device 20 passes through another USB interface 210 and the USB cable 50. Connect to the USB port 11〇 of the computer. The switching device 2 is also connected to the AC/DC adapter device 40 via cables 61 and 62. Inside the switching device 20, the pins of the USB interface 210 and the USB interface 220 are disconnected from the Vex, and the other three pins G are nd, D+ and D- are directly coupled. The cables 61 and 62 are connected to the pins GlOUnd and Vcc of the USB interface 220, respectively. Therefore, through the connection of the switching device 2 to the computer 1 and the AC/DC adapter 40, the portable device 30 can be adapted from the AC/DC without having to terminate the data exchange with the computer 10. A charging current greater than 500 mA is obtained at device 40 to charge rechargeable battery 330 in a fast charging mode. In a specific embodiment, when the switching device 2 is removed, the USB interface 110 of the computer 1 and the USB interface 310 of the portable device 3 are directly connected by the USB cable 50, the computer 10 can be integrated The charging mode control circuit 32〇k of the portable device 3〇 provides a charging power source with a voltage of (5+5%) V and a current of not more than 500 mA. At this time, it can be engaged with 8 Γ 301345 "7] days ^^ ♦ The device 30 can refer to the second figure in the normal charging mode while exchanging data with the computer. The specific circuit diagram of the charging mode control circuit in the embodiment includes: a filter, a wave circuit 321, a protection circuit 325, and a comparison circuit. 322, an integration circuit 323, a charge control circuit 324 and a rechargeable battery 330. The filter circuit 321 consists of a series resistor iu, a valley C1 (hereinafter referred to as a series resistor) and a parallel resistor R2, capacitor C2 (hereinafter referred to as "parallel resistor and capacitor"), one end of the series resistor and capacitor is connected to the Vccl pin of the USB interface 310 of the portable device 30 via a diode 〇4, and the other end is grounded via a parallel resistor and capacitor. In addition, a series connection of the series resistor and the parallel resistor and capacitor (the & point shown in the second figure) is also connected to a positive phase input of the protection circuit 325 and the comparison circuit 322, respectively. The protection circuit 325 is composed of a series of "one pole body Dl, D2 and " series resistor R5, capacitor C4, two
極體Dl、D2置於濾波電路321與一參考電源Vcc2之間，二極體D1的陽 極與濾波電路321中串聯電阻電容與並聯電阻電容的串接處8點相連，陰極 與二極體D2的陽極相連’二極體D2的陰極經由一二極體D3與參考電源 Vcc2相連。電阻R5、電容C4順序置於參考電源vCC2與地之間。此外， 二極體Dl、D2的串接處（第二圖中所示b點）與電阻R5、電容C4的串 接處（第二圖中所示c點）還經由一導線相連。 比較電路322包括一比較器CP、一經由二極體D3連接至參考電源Vcc2 的參考信號產生電路、以及一回饋電路。圖2所示中，參考信號產生電路 由電阻R4與電阻R7串聯構成’電阻R4經由二極體D3與參考電源Vcc2 相連，電阻R7與地相連。電阻R4與R7的串接處（第二圖中所示d點） 連至比較器CP的反相輸入端。回饋電路由一回饋電阻R6構成，回饋電阻 R6 —端連至電阻R4與R7的串接處d點，另一端連接至比較器cp的輸出 端。在本實施例中，由參考信號產生電路產生的參考信號Vref經由比較器 CP的反向輸入端輸入比較器CP ’另’從充電電源（電腦丨〇或ac/dC適 配裝置40)處經USB介面310的Vccl引腳傳輸的充電電壓vini經濾波電 路321濾波後成為紋波信號，該紋波信號從比較器CP的正相輸入端輸入比 較器CP。比較器CP將該兩種信號比較後，輸出一波形信號至積分電路323 中。 積分電路323由一串聯置於比較器CP的輸出端與地之間的電阻R3與 電容C3組成。電阻R3連接比較器CP的輸出端，電容C3接地，電阻R3 與電容C3的串接處（第二圖中所示e點）連接至充電控制電路324的充電 9 1301345 控制介面Cn。充電控制電路324的電源介面Pin與可檇式 介面310的Vccl引腳相連，其輸出介面〇说與待充電的可充電電池33〇相 連。在本實施例中，濾波電路321過濾從USB介面310的Vccl引腳輸出 的充電電壓Vinl後，輸出一紋波電壓（即紋波信號）vouU至比較電路322。 比較電路322將紋波信號Voutl的電壓幅值與參考信號產生電路產生的參 考^號Vref的電壓值比較，輸出一波形信號v〇ut2至積分電路323，積分 電路323積分該波形信號後輸出一控制信號Vout3送至充電控制電路324 的充電控制介面Cn，充電控制電路324根據該控制信號Vout3自動識別充 電電源：電腦10或AC/DC適配裝置40，從而控制從電源介面pin處流入 與從輸出介面Out流出的電流的大小，以此控制可充電電池33〇的充電模 式。 從USB介面310的Vccl引腳輸出的充電電壓vinl經二極體D4後輸 出的電壓中，具有不同的電壓頻率，濾波電路210過濾出某一頻率的交流 電壓即具相應電壓幅值的紋波信號Voutl。在具體應用中，由於從AC/〇c 適配裝置40與從電腦10經由USB介面310的Vccl引腳輸出的充電電壓 Vinl的純潔度不同’因而過遽出的紋波信號v〇uti的電壓幅值大小也不同。 例如，從AC/DC適配裝置40處傳輸來的充電電壓Vinl經過濾後所得的紋 波信號Voutl最大電壓幅值Vml —般大於l〇〇mv，而從電腦10處傳來的 充電電壓Vinl經過濾後所得的紋波信號Voutl最大幅值Vm2 一般小於 100mV。 ' 比較電路322將紋波信號Voutl的電壓幅值與參考信號Vref的電壓值 相比較後，輸出一個相對應的波形信號Vout2。在本發明的具體實施例中， 參考信號Vref的電壓值應介於這兩個紋波信號最大電壓幅值Vmi、Vm2 之間，例如設置參考信號Vref的電壓值為i〇〇mv，當比較電路322正相輪 入端輸入的紋波信號Voutl來自電腦1〇時，該紋波電壓最大電壓幅值 低於參考信號Vref的電壓值，因而輸出的波形信號V〇ut2為一持續的低電 平信號；當其輸入的紋波信號Voutl來自AC/DC適配裝置40時，該紋、皮 中的最大電壓幅值Vm2與參考#號Vref的電壓值相比有高有低，因而輸出 波形信號Vout2為一矩形波形式。 & 積分電路323積分從比較電路322輸出的波形信號ν_2後輸出一相 應的控制信號Vout3，以決定充電控制電路324的控制模式。當波形传號 10 1301345 士 |9争邊《?變正替換頁 、 Vout2為一持績的低電平信號時，經積分後輸出的控制信號-1 續的低電平；當波形信號Vout2波形為一矩形波時，經積分後輸出控制信 號Vout3為一錯齒波或三角波等形式。 • 充電控制電路324根據根據積分後的控制信號Vout3作為其充電模式 • 的控制信號，決定對可充電電池330採取相應的充電模式充電。當充電控 制電路324接受的控制信號vout3為鋸齒波或三角波等形式的波形時，^ 識別充電電源來自AC/DC適配裝置40，從而決定對可充電電池33〇採取充 電電流大於5〇OmA的快速充電模式進行充電；當充電控制電路似接受的 控制b虎Vout3為持續低電平時，其識別充電電源來自電腦1〇，從而決定 對可充電電池33G採取充電電流小於5G()mA的普通充電模錢行充電。 保護電路325用於防止充電電壓Vinl瞬間過大時對電路造成的損宝。 此外，在USB介面310的Vccl引腳和參考電源Vcc2的輸入端加入二&體 D3、D4，可以在防止充電電源與參考電源Vcc2之間相互干擾的同時過^ 掉充電電壓Vin卜參考電源Vcc2的輸出中的負脈衝。正常情況下，充電^ 壓彻經過濾波電路別後的紋波電壓幅值遠小於參考電源、_ 電壓，保護電路325中的二極體D1工作在截止狀態。當充電電壓㈣ 間過大，經過濾、波電路训後的紋波電壓幅值大於參考電源Μ的+ 壓時，保護電路22〇中的二極體D1工作在導通狀態，保護電路工作$ 電容C4放電防止瞬間過高的充電電壓％“對電路造成的損害。 义 本發明關於比較電路322的參考信號Vref的電壓值不限ς⑽阶 據輸入的充電電源具體情況的不同，Vrcf的電壓值只要介於 : 紋波健的最大賴碰Vml、恤之·可崎現錢 絲上所述，以上所述僅為本發明之較佳實施例❿已，且 用功效，凡其他未脫離本發明所揭示之精神下所完成之成使 均應包含在下述之申請專利範圍内。 am” ’ 【圖式簡單說明】 第一圖係充電模式控制電路一具體應用的示意圖。 第一圖係充電模式控制電路一實施例的具體電路圖。 【主要元件符號說明】 10 電腦 1301345 轉接裝置 20 可攜式設備 30 AC/DC適配裝置 40 USB線纜 50 線纜 6卜62 USB介面 110 、 210 充電模式控制電路 320 可充電電池 330 濾波電路 321 比較電路 322 積分電路 323 充電控制電路 324 保護電路 325 充電電源 Vccl 參考電源 Vcc2 比較器 CP 電阻 R1 > R2 > 電容 α、C2、 二極體 D 卜 D2、 電源介面 Pin 充電控制介面 Cn 輸出介面 Out 9，·爸.響麵丨 12The polar bodies D1 and D2 are disposed between the filter circuit 321 and a reference power source Vcc2, and the anode of the diode D1 and the series resistor of the filter circuit 321 are connected to the series connection of the parallel resistors and capacitors at 8 o'clock, and the cathode and the diode D2 are connected. The cathode of the anode is connected to the cathode of the diode D2 via a diode D3 and connected to the reference power source Vcc2. The resistor R5 and the capacitor C4 are sequentially placed between the reference power source vCC2 and the ground. Further, the series connection of the diodes D1, D2 (point b shown in the second figure) and the junction of the resistor R5 and the capacitor C4 (point c shown in the second figure) are also connected via a wire. The comparison circuit 322 includes a comparator CP, a reference signal generation circuit connected to the reference power source Vcc2 via the diode D3, and a feedback circuit. In Fig. 2, the reference signal generating circuit is composed of a resistor R4 and a resistor R7 connected in series. 'The resistor R4 is connected to the reference power source Vcc2 via the diode D3, and the resistor R7 is connected to the ground. A series connection of resistors R4 and R7 (point d shown in the second figure) is connected to the inverting input of comparator CP. The feedback circuit is composed of a feedback resistor R6, the termination resistor R6 is connected to the point d of the resistor R4 and R7, and the other end is connected to the output of the comparator cp. In the present embodiment, the reference signal Vref generated by the reference signal generating circuit is input to the comparator CP 'other' via the inverting input terminal of the comparator CP from the charging power source (computer 丨〇 or ac/dC adapter device 40). The charging voltage vini transmitted by the Vccl pin of the USB interface 310 is filtered by the filter circuit 321 to become a ripple signal, which is input to the comparator CP from the non-inverting input terminal of the comparator CP. The comparator CP compares the two signals and outputs a waveform signal to the integrating circuit 323. The integrating circuit 323 is composed of a resistor R3 and a capacitor C3 which are placed in series between the output terminal of the comparator CP and the ground. The resistor R3 is connected to the output terminal of the comparator CP, the capacitor C3 is grounded, and the series connection of the resistor R3 and the capacitor C3 (point e shown in the second figure) is connected to the charging 9 1301345 control interface Cn of the charging control circuit 324. The power interface Pin of the charge control circuit 324 is connected to the Vccl pin of the portable interface 310, and its output interface is connected to the rechargeable battery 33〇 to be charged. In the present embodiment, the filter circuit 321 filters the charging voltage Vin1 outputted from the Vccl pin of the USB interface 310, and outputs a ripple voltage (i.e., ripple signal) vouU to the comparison circuit 322. The comparison circuit 322 compares the voltage amplitude of the ripple signal Vout1 with the voltage value of the reference voltage Vref generated by the reference signal generation circuit, and outputs a waveform signal v〇ut2 to the integration circuit 323. The integration circuit 323 integrates the waveform signal and outputs a waveform. The control signal Vout3 is sent to the charging control interface Cn of the charging control circuit 324. The charging control circuit 324 automatically recognizes the charging power source according to the control signal Vout3: the computer 10 or the AC/DC adapter device 40, thereby controlling the inflow and the slave from the power interface pin. The magnitude of the current flowing out of the output interface Out is controlled to control the charging mode of the rechargeable battery 33A. The charging voltage vin1 outputted from the Vccl pin of the USB interface 310 passes through the diode D4 and has a different voltage frequency. The filter circuit 210 filters out an alternating voltage of a certain frequency, that is, a ripple having a corresponding voltage amplitude. Signal Voutl. In a specific application, since the purity of the charging voltage Vin1 outputted from the AC/〇c adapting device 40 and the Vccl pin from the computer 10 via the USB interface 310 is different, the voltage of the ripple signal v〇uti is excessively generated. The magnitude of the amplitude is also different. For example, the maximum voltage amplitude Vml of the ripple signal Vout1 obtained by filtering from the charging voltage Vin1 transmitted from the AC/DC adapter device 40 is generally greater than l〇〇mv, and the charging voltage Vinl transmitted from the computer 10 is obtained. The maximum amplitude Vm2 of the ripple signal Voutl obtained after filtering is generally less than 100 mV. The comparison circuit 322 compares the voltage amplitude of the ripple signal Vout1 with the voltage value of the reference signal Vref, and outputs a corresponding waveform signal Vout2. In a specific embodiment of the present invention, the voltage value of the reference signal Vref should be between the maximum voltage amplitudes Vmi and Vm2 of the two ripple signals, for example, setting the voltage value of the reference signal Vref to i〇〇mv, when comparing When the ripple signal Voutl of the positive-phase input terminal of the circuit 322 is from the computer 1〇, the maximum voltage amplitude of the ripple voltage is lower than the voltage value of the reference signal Vref, and thus the output waveform signal V〇ut2 is a continuous low level. When the input ripple signal Vout1 is from the AC/DC adapter device 40, the maximum voltage amplitude Vm2 in the grain and the skin is higher or lower than the voltage value of the reference #Vref, and thus the waveform signal is output. Vout2 is in the form of a rectangular wave. & The integration circuit 323 integrates the waveform signal ν_2 output from the comparison circuit 322 and outputs a corresponding control signal Vout3 to determine the control mode of the charge control circuit 324. When the waveform mark 10 1301345 士|9 contiguous edge "? corrects the replacement page, Vout2 is a low-level signal of the performance, the integrated control signal -1 continues low; when the waveform signal Vout2 waveform When it is a rectangular wave, the integrated output control signal Vout3 is in the form of a wrong tooth wave or a triangular wave. • The charge control circuit 324 determines to charge the rechargeable battery 330 in accordance with the control signal Vout3 as its control mode. When the control signal vout3 received by the charging control circuit 324 is a waveform in the form of a sawtooth wave or a triangular wave, etc., the charging power source is identified from the AC/DC adapter device 40, thereby determining that the charging current of the rechargeable battery 33 is greater than 5 〇OmA. The fast charging mode is used for charging; when the charging control circuit seems to accept the control, the tiger Vout3 is continuously low level, and the charging power is recognized from the computer 1〇, thereby determining that the charging current of the rechargeable battery 33G is less than 5G() mA. The money is charged. The protection circuit 325 is used to prevent the damage caused to the circuit when the charging voltage Vin1 is excessively large. In addition, the second & body D3, D4 is added to the Vccl pin of the USB interface 310 and the input end of the reference power supply Vcc2, and the charging voltage Vin can be bypassed while preventing the mutual interference between the charging power source and the reference power source Vcc2. A negative pulse in the output of Vcc2. Under normal circumstances, the amplitude of the ripple voltage after the charging ^ is passed through the filter circuit is much smaller than the reference power supply, _ voltage, and the diode D1 in the protection circuit 325 operates in the off state. When the charging voltage (4) is too large, the amplitude of the ripple voltage after filtering and wave circuit training is greater than the + voltage of the reference power supply ,, the diode D1 in the protection circuit 22 工作 operates in the on state, and the protection circuit operates: the capacitor C4 The discharge prevents an excessively high charging voltage % "damage to the circuit. The voltage value of the reference signal Vref of the comparison circuit 322 is not limited to the specific case of the input charging power source, and the voltage value of the Vrcf is only The above description is only the preferred embodiment of the present invention, and the effect is the same as that disclosed in the present invention. The completion of the spirit should be included in the scope of the following patent application. am" ' [Simple description of the diagram] The first diagram is a schematic diagram of a specific application of the charging mode control circuit. The first figure is a specific circuit diagram of an embodiment of a charging mode control circuit. [Main component symbol description] 10 Computer 1301345 Adapter device 20 Portable device 30 AC/DC adapter device 40 USB cable 50 Cable 6 Bu 62 USB interface 110, 210 Charging mode control circuit 320 Rechargeable battery 330 Filter circuit 321 comparison circuit 322 integration circuit 323 charge control circuit 324 protection circuit 325 charging power supply Vccl reference power supply Vcc2 comparator CP resistance R1 > R2 > capacitance α, C2, diode D Bu D2, power interface Pin charging control interface Cn output Interface Out 9,·爸爸.响面丨12