M3 3 3 002 八、新型說明： 【新型所屬之技術領域】 本創作是有關於一種充電電流判別電路，特別是有關 於一種萬用序列埠（USB)充電電流判別電路。 【先前技術】 近年來，越來越多的產品採用鋰電池來當做它的主要 電源’例如：PDA、DSC、Cellular Phone、Camcorder、Portable Audio、Advanced Game、Assist Bicycle、Electric Scooter 及Bluetooth Device。其原因不外是鋰電池體積小、能量密 度高、無記憶效應、迴圈壽命高、高電壓電池及自放電率 低等優點。但是，鋰離子電池也因能量密度高，使其難以 確保電池的安全性。具體而言，在過度充電狀態下，電池 溫度上升後能量將過剩，於是電解液分解而產生氣體，因 内壓上升而導致有發火或破裂的危機。反之，在過度放電 狀態下，電解液因分解導致電池特性劣化及耐久性劣化。 因此，針對鋰電池的過充、過放、過電流及短路電流的保 護更顯得重要，所以一系列充電電池保護晶片便順勢而生。 充電電池，特別是鋰電池，其充電模式有三種，分別 為切換模式（Switch-Mode)、線性模式（Linear)及脈波充 電模式（Pulse-Charging )，此三種模式分別在功率損耗、 體積及成本上獨領風騷。其中，配合線性模式所衍生的充 電電池保護晶片，諸如MAX1898及SN212005等皆設有一電 流判斷接腳（ISET)，其功能至少包括設定充電電流及反應 電池電壓。電流判斷接腳的電位值可被交流/直流轉換器 (ADC )或比較器（Comparator )偵測出來，且其可用以 6 M3 3 3 002 反應出充電電流是否已被拉低到一閥值（Threshold Value) ’亦即電池已飽和。此功能可用以及時終止充電， 以避免電池過充而發生危險。 最近，上述充電電池保護晶片因其體積小的優勢而被 大量應用在隨身碟等透過萬用序列埠（Universal Serial Bus，以下簡稱USB)充電及傳遞資料的USB充電裝置上。 由於USB具有熱插拔（Hot swappable)的特性，因此充電 電池保護晶片亦必須即時彳貞測USB充電裝置的連接狀態以 丨及時中斷充電狀態。因此，習知之充電電流判別電路如第 一圖所示，係將用以偵測USB連接狀態的萬用序列埠辨識 訊號（USB 一 ID) 400及充電電池500之充電電流3〇〇透過一 電阻600—併導引到一場效電晶體2〇〇的閘極。再藉由場效 電晶體200將上述兩者之變化傳遞到電流判斷接腳1丨〇，藉 此，充電電池保護晶片100之電流判斷接腳n〇可同時偵測 充電電池500之充電狀態及USB之連接狀態，並於充電電池 500充飽時與USB充電裝置被拔離主機時，中止充電電流 300 〇 ，然而，一般使用者在使用隨身碟等USB充電裝置時， 經常只是把隨身碟插上電腦主機一小段時間，待隨身碟上 的資料存取完畢，即將隨身碟自電腦主機上移除。換句話 說，基於使用者的操作習慣與目的，隨身碟上的電池幾乎 不會有被充飽的時候，因此，場效電晶體的存在即形同擺 設。 有鑒於習知技藝之各項問題，為了能夠兼顧解決之， 本創作人基於多年研究開發與諸多實務經驗，提出一種改 良式支撐架，以作為改善上述缺點之實現方式與依據。 7 M333002 【新型内容】 有鑑於此，本創作之目的在提供一充 以降低—萬用序列埠裝置之低硬體成本。—別電路’ 1 ，是，為達上述目的，依本創作之充電 晶有充=池保護晶片及一充電電池。充電電池伴護 4電斷接腳及一輸出接腳，輪出接腳係= ，。其中，當萬用序列埠裝置插入一主2序=辨識 ，電路利用充電電流對充電電池進行U =電電流 電電池，而此時萬用序列埠辨識訊號亦 机、、、5充 態。以池保“片中止執仃充電程序而脫離充電狀 以 徵在用别電路，創作* ，止充電程序，進二=成來;:目電:判斷接腳， 茲為使貴審查委員對本創作之技術 1有更進一步之瞭解與認識，謹佐達到之 s砰細之說明如後。 之實把例及配 【實施方式】 以下將參照相關圖示，說明依本創作較佳丨 電電流判別電路’為使便於理解，下述 8 M3 3 3 002 件係以相同之符號檁示來說明。 請參閱第2圖，其為本創作之充電電流判別電路。本創 作之充電電流判別電路於一實施例中包含一充電電池保護 晶片100及一充電電池500。充電電池保護晶片1〇〇具有—電 流判斷接腳110及一輸出接腳120，輸出接腳120係提供—充 電電流300，電流判斷接腳11〇則用以接收一萬用序列埠辨 識訊號（USB一ID) 400。接下來，請一併參閱第3圖，其為 本創作之操作示意圖。其中，當萬用序列埠裝置，例如隨 身碟700，插入一主機800時，充電電流判別電路利用充電 電流300對充電電池500進行一充電程序；亦即，萬用序列 璋辨識號400觸發電流判斷接腳11 〇，使充電電池保護曰 片100進入充電狀態，而從輸出接腳120輸出充電電流3〇〇予 充電電池500。而當隨身碟700脫離主機800時，萬用序列埠 辨識訊號400將觸發電流判斷接腳ho，使充電電池保護晶 片100中止充電程序而脫離充電狀態。 此外，基於實務考量，本實施例之充電電池5〇〇需具備 高能量密度、無記憶效應及高迴圈壽命等優勢，因此較佳 可為一鋰電池。而本實施例之充電電池保護晶片可選用適 合進行線性模式充電程序之SN212005晶片或ΜΑΧ1898晶 片。此外，本實施例之主機可為一電腦，而萬用序列埠裝 置則可為PDA、DSC、Cellular Phone、Camcorder、Portable Audio、Advanced Game、Assist Bicycle、Electric Scooter、M3 3 3 002 8. New description: [New technical field] This creation is about a charging current discrimination circuit, especially related to a universal serial port (USB) charging current discrimination circuit. [Prior Art] In recent years, more and more products have used lithium batteries as their main power source's, for example, PDA, DSC, Cellular Phone, Camcorder, Portable Audio, Advanced Game, Assist Bicycle, Electric Scooter, and Bluetooth Device. The reason is that the lithium battery has the advantages of small volume, high energy density, no memory effect, high cycle life, high voltage battery and low self-discharge rate. However, lithium-ion batteries also have high energy density, making it difficult to ensure battery safety. Specifically, in the overcharged state, the energy is excessive after the temperature of the battery rises, and the electrolyte is decomposed to generate gas, which causes a crisis of ignition or cracking due to an increase in internal pressure. On the other hand, in the state of excessive discharge, the electrolyte is deteriorated due to decomposition, and the durability is deteriorated. Therefore, protection against overcharging, overdischarging, overcurrent, and short-circuit current of lithium batteries is even more important, so a series of rechargeable battery protection wafers will follow suit. Rechargeable batteries, especially lithium batteries, have three charging modes: Switch-Mode, Linear, and Pulse-Charging. These three modes are power loss, volume, and Cost is the only one. Among them, the rechargeable battery protection chip derived from the linear mode, such as MAX1898 and SN212005, has a current determination pin (ISET), and its function includes at least setting the charging current and the reaction battery voltage. The potential value of the current judging pin can be detected by an AC/DC converter (ADC) or a comparator (Comparator), and it can be used to reflect whether the charging current has been pulled down to a threshold (6 M3 3 3 002) ( Threshold Value) 'The battery is saturated. This feature can be used to terminate charging in a timely manner to avoid danger of overcharging the battery. Recently, the above-mentioned rechargeable battery protection chip has been widely used in a USB charging device for charging and transmitting data through a Universal Serial Bus (USB) such as a flash drive due to its small size. Due to the USB's hot swappable nature, the rechargeable battery protection chip must also instantly detect the connection status of the USB charging device to interrupt the charging state in time. Therefore, the conventional charging current discriminating circuit, as shown in the first figure, transmits a universal sequence 埠 identification signal (USB-ID) 400 for detecting the USB connection state and a charging current of the rechargeable battery 500 through a resistor. 600 - and guided to a gate of the effect transistor 2 。. Then, the field effect transistor 200 transmits the change of the two to the current determination pin 1丨〇, whereby the current determination pin of the rechargeable battery protection chip 100 can simultaneously detect the charging state of the rechargeable battery 500 and USB connection status, and when the rechargeable battery 500 is fully charged and the USB charging device is pulled out of the host, the charging current is 300 中. However, when using a USB charging device such as a flash drive, the user often inserts the flash drive. After a short period of time on the computer host, the access to the data on the flash drive is completed, and the flash drive is removed from the computer host. In other words, based on the user's operating habits and purposes, the battery on the flash drive will hardly be fully charged. Therefore, the presence of the field effect transistor is similar. In view of the problems of the prior art, in order to be able to solve the problem, the creator proposed a modified support frame based on years of research and development and many practical experiences, as a way to improve the above-mentioned shortcomings. 7 M333002 [New Content] In view of this, the purpose of this creation is to provide a low hardware cost for reducing the cost of a universal serial device. - The circuit '1' is, for the above purpose, the charging crystal according to the present invention has a charge protection pool and a rechargeable battery. Rechargeable battery with 4 electric disconnect pin and one output pin, turn out pin system =,. Wherein, when the universal serial port device is inserted into a master 2 sequence=identification, the circuit uses the charging current to perform a U=electric current battery on the rechargeable battery, and at this time, the universal serial port identification signal is also active, and 5 is fully charged. In the case of the pool protection, the film is suspended from the charging process and is removed from the charging mode to use the circuit, create *, stop the charging program, enter the second = Chenglai;: eye electricity: judge the pin, in order to make your review board to this creation The technology 1 has a further understanding and understanding, and the description of the simplifications is as follows. The actual example and the matching [Embodiment] The following will refer to the relevant diagrams to illustrate the better electric current discrimination according to the creation. The circuit 'for the sake of easy understanding, the following 8 M3 3 3 002 pieces are denoted by the same symbol. Please refer to Fig. 2, which is the charging current discriminating circuit of the present invention. The charging current discriminating circuit of the present invention is The embodiment includes a rechargeable battery protection chip 100 and a rechargeable battery 500. The rechargeable battery protection chip 1 has a current determination pin 110 and an output pin 120, and the output pin 120 provides a charging current 300, and the current is judged. The pin 11〇 is used to receive the 10,000 serial 埠 identification signal (USB-ID) 400. Next, please refer to FIG. 3, which is a schematic diagram of the operation of the creation. For example with The disc 700 is inserted into a host 800, and the charging current discriminating circuit performs a charging procedure on the rechargeable battery 500 by using the charging current 300; that is, the universal serial port identification number 400 triggers the current judging pin 11 〇 to enable the rechargeable battery protection chip. 100 enters the charging state, and outputs a charging current 3 from the output pin 120 to the rechargeable battery 500. When the flash drive 700 is disconnected from the host 800, the universal serial port identification signal 400 triggers the current determination pin ho to make the rechargeable battery The protection chip 100 stops the charging process and is out of the charging state. Further, based on practical considerations, the rechargeable battery 5 of the embodiment needs to have the advantages of high energy density, no memory effect and high loop life, so it is preferably a lithium battery. The SN212005 chip or the ΜΑΧ1898 chip suitable for the linear mode charging process can be selected for the rechargeable battery protection chip of the embodiment. In addition, the host of the embodiment can be a computer, and the universal serial port device can be a PDA or a DSC. , Cellular Phone, Camcorder, Portable Audio, Advanced Game, Assist Bicycle, Electric Scooter,
Bluetooth Device及隨身碟等。 以上所述僅為舉例性，而非為限制性者。任何未脫離 M3 3 3 002 本創作之精神與範疇，而對其進行之等效修改或變更，均 應包含於後附之申請專利範圍中。 【圖式簡單說明】 第1圖係為習知之充電電流判別電路； 第2圖係為本創作之充電電流判別電路；以及 第3圖係為本創作之操作示意圖。 【主要元件符號說明】 10 0 ·充電電池保護晶片， 110 :電流判斷接腳； 120 :輸出接腳； 200 :場效電晶體； 300 :充電電流； 400 ··萬用序列埠辨識訊號； 500 :充電電池； 600 :電阻； 700 :隨身碟；以及 800 :主機。Bluetooth Device and flash drive, etc. The above is intended to be illustrative only and not limiting. Any changes or modifications to the spirit and scope of this creation that are not removed from M3 3 3 002 shall be included in the scope of the appended patent application. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a conventional charging current discriminating circuit; Fig. 2 is a charging current judging circuit of the present invention; and Fig. 3 is a schematic diagram of the operation of the present invention. [Main component symbol description] 10 0 · Rechargeable battery protection chip, 110: Current judgment pin; 120: Output pin; 200: Field effect transistor; 300: Charge current; 400 · Multi-use sequence 埠 identification signal; 500 : rechargeable battery; 600: resistance; 700: flash drive; and 800: host.