200803109 九、發明說明： 【發明所屬之技術領域】 係關於-種電子裝置之電源電路，特別是—種利用通 【13=與充電器對電子裝置之電池進行充電之電源電路。 【先刖技術】 隨著資歡發展，可攜式電子裝置如錢、個人數位助理 (Personal Dlgltal Assent ； PDA) . =r普及’這些電子裝置通常是由内部之峨供應運 ，電池耗盡電量就必須再充電。大多數的電 :衣=利::外接的充電器進行_電池充電或直㈣ 电，：、、'、而，通吊一種充電器只適用於一種電 用者财觸繼時，囉地亦必須編相配之娜 然而’多個充電器對於收藏或外出攜帶皆不甚方便。 一種通用串列匯流排（Universal Serid加；咖），里廣泛 2言=於電腦系統與上述之電子展置等，通用串列匯流排具有資 科線14電力介面，透過通用串列匯流排將電腦系統與電子裝置相 連接’電腦純可透過㈣傳輪介面_電子裝置進行資料串列 傳輸’並透過電力介面以供應驅動電子裝置之電源，於此，若能 51=料舰流排對電子裝置進行充電，實可解決多個充 :過礙於電腦系統之通用串列匯流拂的最大輪出電流僅為 宅安培(mA)，若欲·_串_流排對電子打進行充 5 200803109 :’再，電子裝置本身運作所需之電流，則會有供電不足的現 ’雜於此’ t界需開發-種外部電源至電子裝置之電源電路 γ、’此電源電路設計可_解虹制題，並可_實施充電 為與通用串列匯流排之充電切換。 、 【發明内容】 …為了解決上述的問題，本發明揭露―種電子裝置之電源電路 2二==發明之電源電路達成可利用通用串列匯流排與充電 °°對毛子衣置之電池充電，並自動調整充電電流大小。 電源電路包括有外接電源切換電路、電池充電管理積體電 ==輸以及電池。外接電源切換電路具有通用串列匯 *充⑽之雙電源輸人，係利用電晶體以切換雙電源盆中之 一所提供之電源，以自動選擇適當的電源而有效率地對電池充 電；電池充電管_體電池充辟理碰·㈣電池轉 料源切換電路，驗防止輸人之電源突波電流轉護電池:、電 ^調節電路用以調整充電電流之大小，當外接電源切換電路僅有 =恤流職人綱，輸爾物峨流= 防止％子裝朗時錢錢作時之供電不足狀況，另_方面，舍 電"丨L凋大以加快充電速度。 本發明之魏電路可設置於可觀好裝置如钱、個人數 位助理（PDA)、數位相機以及電子_機等，當使用者 腦時，這些電子裝置皆能利用電腦之通用串列歸排對個別之電 200803109 ’也充电’可有效解決f知多個充電器之不便，對使时而言確實 增加了使用上的方便性。 以上之關於本發_容之賴及以下之實施方式之說明係用 、示範’、解釋本發明之精神與原理，並且提供本發明之專利申請 範圍更進一步之解釋。 【實施方式】 以下在貝施方式中詳細敘述本發明之詳細特徵以及優點，其 内谷足以使任何熟習相關技藝者了解本發明之技術内容並據以實 鈿’且根據本說明書所揭露之内容、申請專利範圍及圖式，任何 热白相關技勢者可輕易地理解本發明相關之目的及優點。 「第1圖」係為本發明之電子裝置的電源電路方塊圖，如圖 所不，電源電路10包括有外接電源切換電路1〇1、電池充電管理 積體電路102、電流調節電路103以及電池104。適用此電源電路 之電子裝置係為可攜式電子裝置如手機、個人數位助理 (PDA)、數位相機以及電子翻譯機等。 外接電源切換電路101具有至少雙電源輸入，分別為通用串 列匯流排201與充電器30,通用串列匯流排2〇1係為電腦系統2〇 之—傳輸介面，電腦系統20透過φ列匯流排201之電力介面 輪出電源至外接電源切換電路101;充電器3〇連接至外部電源4〇 (諸如習知家用之交流（AC)電源插座或汽車中的直流（DC) 電源插口），外接電源切換電路1〇1即可透過充電器30轉換外部 %源40之笔源以獲取所需之直流電源’例如交流電/直流電轉換 7 200803109 或直流電/錢電雛。外接電_ 流排201與充電哭3〇之門ό# 此夠仗通用串列匯 K)W約Γ 4擇適當的電源以有效率地對電、、也 104充電，根據本發明一膏 卞1耵包池200803109 IX. Description of the invention: [Technical field to which the invention pertains] A power supply circuit for an electronic device, in particular, a power supply circuit for charging a battery of an electronic device with a charger. [First-hand technology] With the development of Zihuan, portable electronic devices such as money, personal digital assistant (PDA). =r popularization of these electronic devices are usually supplied by the internal supply, the battery is depleted It must be recharged. Most of the electricity: clothing = profit:: external charger for _ battery charging or straight (four) electricity, :,, ', and, a crane is only suitable for a type of electricity users, the land is also It must be matched and matched. However, multiple chargers are not convenient for collecting or carrying out. A universal serial bus (Universal Serid plus; coffee), which is widely used in the computer system and the above-mentioned electronic display, etc., the universal serial bus has the power line 14 power interface, through the universal serial bus The computer system is connected to the electronic device. The computer is purely transmissive (four) transmission interface _ electronic device for data serial transmission 'and through the power interface to supply the power supply for driving the electronic device, if the 51 = material ship row to the electronic The device can be charged, which can solve multiple charging: the maximum output current of the universal serial confluence of the computer system is only the home ampere (mA), if you want to _string _ stream to charge the electronic device 5 200803109 : 'Further, the current required for the operation of the electronic device itself, there will be insufficient power supply. The need to develop - the external power supply to the electronic device power circuit γ, 'this power circuit design can _ solution rainbow The problem is solved and the charging can be implemented to charge the switch with the universal serial bus. SUMMARY OF THE INVENTION In order to solve the above problems, the present invention discloses a power supply circuit for an electronic device. 2 == The power supply circuit of the invention achieves the use of a universal serial bus and charging ° to charge the battery of the hair garment. And automatically adjust the charging current. The power circuit includes an external power switching circuit, battery charge management integrated power == input, and battery. The external power switching circuit has a dual power supply input of a universal serial port (10), which uses a transistor to switch the power provided by one of the dual power supply basins to automatically select an appropriate power source to efficiently charge the battery; Charging tube _ body battery charging touch (4) battery transfer source switching circuit, to prevent the input power supply surge current transfer battery:, electric ^ adjustment circuit to adjust the size of the charging current, when the external power switching circuit only There are = shirts, staff, turbulence = to prevent the lack of power supply when the money is spent on the money, and _, the house is smashed to speed up the charging speed. The Wei circuit of the invention can be arranged in a considerable device such as money, a personal digital assistant (PDA), a digital camera, an electronic camera, etc., when the user is in the brain, the electronic devices can use the universal serial arrangement of the computer to individually The electric power of 200303109 'also charge' can effectively solve the inconvenience of knowing a plurality of chargers, and the convenience of use is indeed increased for the time. The above description of the embodiments of the present invention is intended to be illustrative of the spirit and principles of the present invention and to provide further explanation of the scope of the invention. [Embodiment] The detailed features and advantages of the present invention are described in detail in the following description, which is sufficient to enable anyone skilled in the art to understand the technical contents of the present invention and to implement the contents according to the present specification. The scope and schema of the patent application, the related objects and advantages of the present invention can be easily understood by any of the related art. FIG. 1 is a block diagram of a power supply circuit of the electronic device of the present invention. As shown in the figure, the power supply circuit 10 includes an external power supply switching circuit 1 , a battery charge management integrated circuit 102 , a current adjustment circuit 103 , and a battery . 104. The electronic devices that are suitable for this power circuit are portable electronic devices such as mobile phones, personal digital assistants (PDAs), digital cameras, and electronic translators. The external power switching circuit 101 has at least dual power input, which is a universal serial bus 201 and a charger 30 respectively. The universal serial bus 2〇1 is a computer system 2, a transmission interface, and the computer system 20 transmits through the φ column. The power interface of the row 201 turns the power out to the external power switching circuit 101; the charger 3 is connected to the external power source 4 (such as a conventional household AC (AC) power socket or a direct current (DC) power socket in the car), externally connected The power switching circuit 1〇1 can convert the pen source of the external source 40 through the charger 30 to obtain the required DC power source 'for example, AC/DC conversion 7 200803109 or DC/money. External power _ flow 201 and charging cry 3 〇 此 此 此 此 此 此 此 此 此 此 此 此 仗 仗 仗 仗 仗 仗 仗 仗 仗 仗 仗 择 择 择 择 择 择 择 择 择 择 择 择 择 择 择 择 择 择 择 择 择 择1 bag pool
者外接例係以充電器3〇為優先，亦即， 田外接电源切換電路1〇1先連 P 接取電源時，若外接1偷f 匯流排2G1透過其 時則切槌二t 電路101再連接至充電器，時，此 日守則切換至充電器30,係透過充了此 除就再切^ —旦充電器30拔 供電。糊^排2G1，再軸物,m流排加 =充電管理積體電路102電性連接至外接電源切換電路 、心調節電路103以及電池 、 藉由通用串列s流排201或充電哭顧^接电源切換電路101 電池充電管理積體電路102，電二=，將電源輪入至 盘々w 充電官理積體電路串聯電池104 ^卜接__電路1Q1 ’用以控制截止與充放 電流調節電路103用以調整充電電流之大小，由於通用串列 匯流排20!的最大輸出電流僅為5⑻毫安培，因此，當外接電源 切換電路101僅連接通用串列匯流排2〇1時，電流調節電路⑻ 會將充電電_、以滿足電子裝置1G姻·毫安培之剩餘電流 而運作時，將不會發生供電不足之狀況。另—方面，當外接電源 切換电路101連接充電盗3〇時，由於充電器如所接之外部電源 40之屯冰大至足以供應電子裝置1〇同時充電與運作所需，因此， =，以預防過高的電壓或電流傷害電池1〇4，並且防止短路以 及電池1〇4之電池芯損壞，可達成保護電路之目的。 8 200803109 電流調節電路1Q3會將充電電流調大，以加快充電飽和之速度。 電池取，係提供電子裝置料作所需之電源，電子裝^10 雖可透過通用串列匯流排加或充電器30直接供電，一旦通用串 列錢排2〇1與充電器30接拔除後，仍需由電池104對電子裝置 10供電，這亦是電池腦於細完時必需再充電之目的。根據 本發明之-實施例，電池1G4係為可再充子電池或—此 其他類型之可再充電型電池。 二 明—帛2A圖」’係為本發明之外接電源切換電路⑺ 電路圓’如圖所示，外技兩、、店 接电源切換祕101組態成包括有電晶體 QW、:阻R1〜R3以及電容01等元件，其中電謂〜幻用以 偏屢’電容α接地咖肖除魏雜訊，電晶_可連接至通用 =歹m机排2〇1與充電器30，當僅有通用串列匯流排加連接電 】體=時，電晶體Q1透過電阻R1之偏㈣導通閘極使得通用 =排201能夠供電，此時，無充電器％連接至電晶師， 口此’“體Q3之基極無偏壓，而連帶電晶體以”導通 ===為關狀態以防止通用串列匯流排迎之電源回灌而 二致块動作。當充電器3G連接至電晶體Φ與電晶體Q2，電晶 =聰以使得通财龍流獅停止供電，電晶師之基 :則透過電晶體應電源。另外，3 = =他偏壓控制線路(树示），以避免電路產生 昭「= 2B圖」，係為本發明之另—較佳外接電源切換電路HH之電關 200803109 如圖所不’外接電源切換電路101可用二極體D1代換「第2a圖」 之電晶體Q1，如此方式將可節省成本。根據本發明—具體實施 例’包晶體Q1與電晶體Q2係為一種金屬氧化半導體場效電晶 體（Metal 〇xide Semic〇nduct〇r Fidd 職ct 伽^ ; MOSFET) ° 明麥妝「第3A圖」，係為本發明之電流調節電路1〇3之電路 圖’如圖所示’電流調節電路朋組態成包括有電晶體以以及 電阻R4〜R6’電晶_可連接至充電祕當充鞋輝上時， 電晶導通，電阻R4與電阻R5並連，致使阻抗變小而加大 Z充电屯机，當充電器30拔除後，若還有通用串列匯流排2〇1連 至外接電源切換電路1〇1而提供電源，此時，電晶師關閉， =電阻R4提供壓降，於此’阻抗相較於並聯後之阻抗為大，而 =電_、。舉例而言，電隨與電阻把之大小分別為咖 二’ Ω)與3,6 k歐姆⑼，以電晶體Q4作為充電電流之切換， 二P右當電晶體Q4導通而兩電阻並聯時（即利用充電器邓供 :)，充電電流約為300毫安培，當電晶體Q4關閉而 奴 ^供壓降時（即利用通用串列匯流排迎供電)，充^二 :0干電晶體Q4之開極另設有其他偏壓控制線:(未 產生誤動作。請參照「第3B圖」，係為本發明 另較佳電流調節電路1〇3電路圖，如圖所示，電济調 可只用一個電阻R7取代「第3A 帝 。即。、路 R4〜R6，於此 圖」之电曰曰體Q4以及電阻 、此不吕外接％源切換電路101連接係為通用串列匯 10 200803109 流排201或充電器30，充電電流皆相同，雖利用通用串列匯流排 Γ供電時，將有相對「第3A圖」較高的充電電流之需求，不過 田电子裝置！0本身未開機運作時，卻不會有供電不足之情形，以 此方式更有節省成本之效益。根據.私 〇4在立贴®" i祀據本毛明—具體實施例，電晶體 Q4係為一種金屬氧化半導體場效電晶體。 雖^本發顶狀實施_露如上，财限 發明。在不脫離本發明之精神和範圍内 疋本 屬本發明之專_翻。·本發騎界^=卿=均 所附之申請專利範圍。 靶圍明芩专 【圖式簡單說明】 第1 ®為本剌之電子裝電源電路方塊圖. 圖為本發明之外接電源切換電路之電路圖； 弟2β圖為本發明之另一較佳 第3AWA 士八 卜接包源切換電路之電路圖； 第犯二/&電流_ f路之電路圓；以及 罘3B圖為本發明之另一 【主要元件符號朗】 心丨旧㈣路電路圖。 10............................ 20..............··········電腦系統 30.....................···充電器 2^.....................••外部電源 …...................外接電源切換電路 102… ^ ...............池充電管理積體電路 11 200803109 103......................電流調節電路 104....................••電池 201......................通用串列匯流排 C1........................電容 D1.......................二極體 R1〜R7.................電阻 Q1-Q4................電晶體 12The external example is based on the charger 3〇, that is, when the field power switching circuit 1〇1 is connected to the P first, the external circuit 1 is connected to the bus 2G1, and then the second circuit 101 is switched. When connected to the charger, the code will be switched to the charger 30 on this day, and the battery will be powered by the charger 30. Paste 2G1, re-axis, m-flow add=charge management integrated circuit 102 is electrically connected to external power supply switching circuit, heart conditioning circuit 103 and battery, by universal serial s-flow row 201 or charging crying Power switching circuit 101 battery charge management integrated circuit 102, electric two =, power supply wheeled to the disk 々 w charging official integrated circuit circuit series battery 104 ^ __ circuit 1Q1 ' to control cut-off and charge and discharge current regulation The circuit 103 is used to adjust the magnitude of the charging current. Since the maximum output current of the universal serial bus 20! is only 5 (8) milliamperes, when the external power switching circuit 101 is only connected to the universal serial bus 2〇1, the current is adjusted. When the circuit (8) is operated to charge the remaining current of the electronic device 1G ampere milliamperes, there will be no shortage of power supply. On the other hand, when the external power switching circuit 101 is connected to the charging thief, since the charger is connected to the external power source 40, the ice is large enough to supply the electronic device 1 while charging and operating, therefore, Preventing excessive voltage or current from damaging the battery 1〇4 and preventing short circuit and damage to the battery cell of battery 1〇4 can achieve the purpose of protecting the circuit. 8 200803109 The current regulation circuit 1Q3 will increase the charging current to speed up the charge saturation. The battery is taken to provide the required power for the electronic device. The electronic device can be directly powered by the universal serial bus or charger 30. Once the universal serial bank 2 is connected to the charger 30, The battery 104 is still required to be powered by the battery 104, which is also the purpose of recharging the battery brain when it is finished. According to an embodiment of the present invention, the battery 1G4 is a rechargeable sub-battery or - this other type of rechargeable battery. "Second-帛2A"" is the external power supply switching circuit (7) circuit circle of the invention as shown in the figure, the external technology, the shop connection power switching secret 101 is configured to include a transistor QW,: resistance R1~ R3 and capacitor 01 and other components, in which the electric singular ~ illusion is used repeatedly 'capacitor α grounding coffee Xiao Wei Wei Wei, TEL _ can be connected to the universal = 歹m machine row 2 〇 1 and charger 30, when only When the body is connected, the transistor Q1 is transmitted through the resistor R1 (4) to turn on the gate so that the universal=row 201 can supply power. At this time, no charger is connected to the electromorphist. The base of the body Q3 is unbiased, and the connected transistor is turned on with the "conduction ===" to prevent the universal serial bus from welcoming the power supply to the second block. When the charger 3G is connected to the transistor Φ and the transistor Q2, the electric crystal = Cong to stop the power supply of the Tongcai Longshi, the base of the electromorphist: the power supply through the transistor. In addition, 3 = = his bias control line (tree) to avoid the circuit to produce the "= 2B picture", which is another of the invention - the preferred external power supply switching circuit HH is off 200803109 as shown in the figure The power switching circuit 101 can replace the transistor Q1 of "2a" with the diode D1, which can save costs. According to the present invention - the specific embodiment of the package crystal Q1 and the transistor Q2 is a metal oxide semiconductor field effect transistor (Metal 〇xide Semic〇nduct〇r Fidd job ct gamma ^ MOSFET) ° Ming Mai makeup "3A The circuit diagram of the current regulating circuit 1〇3 of the present invention is as shown in the figure. [The current regulating circuit is configured to include a transistor and a resistor R4 RR6', and can be connected to a charging secret shoe. When it is on, the transistor is turned on, and the resistor R4 is connected in parallel with the resistor R5, so that the impedance becomes smaller and the Z charging device is increased. When the charger 30 is removed, if there is a universal serial bus 2〇1 connected to the external power source Switching circuit 1〇1 provides power supply. At this time, the electromorphist is turned off, and = resistor R4 provides a voltage drop. Here, the impedance is larger than the impedance after parallel connection, and = _. For example, the size of the electric and the resistors is 255 Ω and 3,6 k ohms (9), and the transistor Q4 is used as the charging current. When the two transistors are turned on and the two resistors are connected in parallel ( That is, using the charger Deng:), the charging current is about 300 milliamperes, when the transistor Q4 is turned off and the slave is supplied with voltage drop (that is, using the universal serial busbar to supply power), charging 2: 0 dry transistor Q4 There are other bias control lines for the opening: (No malfunction occurs. Please refer to "3B" for the circuit diagram of the other preferred current regulating circuit 1〇3 of the present invention. As shown in the figure, the power adjustment can only be Replace the "Electrical body Q4" with the resistor R7, that is, the "R3 to R6, the road R4 to R6, in this figure", and the resistor, the external source and the source switching circuit 101 are connected to each other as a universal serial port 10 200803109 Row 201 or charger 30, the charging current is the same, although using the universal serial busbar power supply, there will be a higher charging current than "3A", but the field electronics 0! , but there will be no shortage of power supply, which is more cost effective. According to the specific example, the transistor Q4 is a metal oxide semiconductor field effect transistor. The present invention is not limited to the spirit and scope of the present invention. The present invention is in the scope of the patent application. The target area is attached to the patent application scope. 】 The first ® is the block diagram of the electronic power supply circuit of the present invention. The figure is a circuit diagram of the external power supply switching circuit of the present invention; the second 2β figure is a circuit diagram of another preferred third AWA singapore source switching circuit of the present invention The second circuit of the second /& current _ f road; and the 罘3B diagram is another [main component symbol lang] of the invention. The circuit diagram of the old (four) road. 10........... ................. 20...................................... computer system 30..... ................···Charger 2^.....................•• External power supply... ..................External power supply switching circuit 102... ^............... Pool charge management integrated circuit 11 200803109 103. .....................Electricity Adjustment circuit 104....................••Battery 201........................General Serial bus C1........................ Capacitor D1................... .... diode R1~R7.................resistance Q1-Q4................Crystal 12