1304284 九、發明說明： 【發明所屬之技術領域】 . 本發_關於—觀子裝置的供電電路，制指-種可充分利用電池 的有效電壓進行對電子裝置供電以延長其使用時間的電路。 【先前技術】 技，經常被應用在-些手持式電子裳置（如行動電話、pD幻的鐘電 • 池，其有效電壓一般可用的範圍為2.7V〜4.2V，如圖i所示，為一般電子裝1304284 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a power supply circuit for a viewer device, which is a circuit that can fully utilize the effective voltage of a battery to supply power to the electronic device to extend its use time. [Prior technology] technology, often used in some handheld electronic devices (such as mobile phones, pD magic clocks, pools, the effective voltage is generally available in the range of 2.7V ~ 4.2V, as shown in Figure i, General electronic equipment
使用此外備用電池12的電力主要是供使用者在替換主電池η的同時The power of the backup battery 12 is mainly used for the user to replace the main battery η.
pda ’如此，鋰電池在2·7ν〜3·3ν範圍的 子衣置使用的時間上也會受到壓縮。 3主電池11的使用範圍，會將該降 也就是當主電池π的輸出電麼低 針對上述的問題，有些廠商為了增加主 屢元件13改㈣關元絲提供電源 4 1304284 於抓日μ經由該升降壓元件進行升壓處理，而可增加主電池u有效 電壓被利㈣關，但是如此方式除了會增加電路板的使用面積外，其效 率也曰歧差，故’ 4能進—步能提高主電池η供電的使用範圍以 曰力電子《置的制時間，㈣本案判人所欲職之技術困雜之所在。 【發明内容】 電路’係包括：一主電池、一備用電 一升壓單元、一切換單元及一控制單In this case, the lithium battery is also compressed in the time period in which the lithium battery is used in the range of 2·7 ν to 3·3 ν. 3 The range of use of the main battery 11 will be the lower the output of the main battery π. For some of the above problems, some manufacturers provide power supply 4 1304284 to increase the main component 13 (4). The buck-boost component is boosted, and the effective voltage of the main battery u can be increased (4). However, in addition to increasing the use area of the circuit board, the efficiency is also inconsistent, so that the Improve the use of the main battery η power supply to the time of the power system, (four) the case of the case of the person in charge of the job. [Claim] The circuit includes: a main battery, a standby power, a boosting unit, a switching unit, and a control list.
於是，本發明之電子裝置的供電 池、一電壓偵測單元、一降壓單元、 元；其中 主電池’用以提供電子裝置運作所需之電壓，主電池具有—正電極； 条1：單元八有。又疋之參考電壓，主要用以降低主電池的輸出電壓 _至參考電壓以提供給電子裝置，降壓單元並具有—輸人端及—致能端，其 中輸入纟 而電氣搞合至該主電池的正電極· 電壓制單70，用以反應主電池龍下降至該設定之參考電壓而發送 -錢’ _壓伽梓it具有_輸人端及—輸出端，其中該輸人端電氣麵 合至該主電池的正電極； • 升壓單元’具有一與降壓單元的參考電壓值-致的參考電壓，用以提 升該主電池的輸出電壓至該參考電壓以提供給該電子裝置，該升壓單元具 有一輸入端及一致能端； 切換單7G，可為- MOS開關元件，用以將該主電池的輸出電壓切換至 該升壓單元而產生電驗接’切解元具有複數輸人端、—輸出端及一致 能端，其中—輸人端電氣輕合至主電池的正電極，另一輸人端電氣耗合至 備用電池的正電極’而輸出端電氣輕合至升壓單元的輸入端； 5 1304284 壯傷用電池，在電子裝置更換主電池時，取代該主電池供應電力給電子 衣置销用電池具有-正電極，該正電極與該切換單摘其中—輸入端產 - 生電氣轉合；以及 义工制單7〇 ’可為-複雜的可程式邏輯元件，用以接收該電壓偵測單元 發送軌號，其中在接收該主電池電壓低於該設定之電壓的訊號時，控制 、單元將主電觸輸出電影刀換至升壓單元，並控制該降壓單元關閉 ^啟動娜壓早減調升魅電池的輸丨電壓供該電子裝置使用，該控制 0 '、有複紅制知’且分別與該電壓細彳單元的輸出端、該切換單元的 _麵壓單元的致輯及該升壓單元的致能端產钱氣麵合。 * 【實施方式】 為使貴審查委員能進一步瞭解本發明之結構、特徵及其目的，兹附 以圖式及較佳具體實施例之詳細說明如后： 月$閱圖一所示’為本發明電子裝置的供電電路較佳實施例之電路示 心圖如圖所不，本實施例電子裝置係以一個人數位助理機(pDA)為例，其 供電電路主要具有一主電池21、-備用電池22、-電壓偵測單元23、一切 換單70 24、一控制單元25、-降壓單元26及-升壓單元27。於其他變化 例中電子哀置亦可為行動電話(ceii phone)、呼叫器(pager)、筆記型電腦 (Note Book)、電子辭典或其他電子裝置。 主電池21具有一正電極及一負電極，其中正電極與電壓偵測單元23 的輸入端(IN)、切換單元24的其中一輸入端(A1)及降壓單元加的輸入端 產生電氣耦合，而負電極接地；本實施例主電池21係以鋰電池為例，其有 6 1304284 效電【的制範圍為2 7V〜4 2V，主要用以提供個人數位助理機(PDA)運作 所而之電壓，於其他變化例中，主電池21亦可為㈣電池_㈣ battery) (nickd cadmium battery) . m (nickd hydr〇gen • 咖⑼、和南分子鋰電池（polymer lithium battery)或其他可充電重複使用的 二次電池。 …降[單元26可為一般的降壓元件(IC)或電路，其中設定有一參考電 [。亥多考電壓為個人數位助理機(pDA)之操作電壓，降壓單元％主要用 鱗低主電池21的輸出電壓至參考賴以提供給電子裝置；降壓單元％ 並具有—輸入端㈣、一輸出端(0UT)、一地端(GND)及-致能端_，其 矜h(IN)電氣輕合至主電池21的正電極，地端(侧接地，致能端(εν) 電_合至控制單元25的其中一控制端㈣，而輸出端(〇υτ)電氣麵合至一 '貞載28 ’其中負载28在此指的是個人數位助理機(PDA)，亦即主電池21 ^輸㈣賴鱗解元26關之後提供給貞載2_人數位舰機）；於本 實施例中個人數位助理機之操作電壓設定為33v;然於其他變化實施例亦 可為其他設定電壓範g，而並不以此為限。 φ 電[偵測單元23用以反應主電池21電壓下降至蚊之參考電壓 (3.3V)而發达-訊號至控制單元％，該電壓伽彳單元μ具有一輸入端 ㈣、-輸出端(0UT)及地端(GND)，其中該輸入端㈣電氣麵合至該主電 的正電極輸出端(〇υτ)電氣麵合至控制單元^的其中一控制端㈣， 而地端(GND)接地。 △升璧單it 27具有與降壓單元％❸參考電壓值一致的參考電壓，該 參考電壓亦細人數㈣_(PDA)讀作電壓，升料元π主要用以提 升該主電池21的触電壓至該參考電壓以提供給該電子裝置；升壓單元27 H輸入MIN)、一輸出端(0UT)、一地端(gm取一致能端(en)，其 7 1304284 中輸入端(IN)電祕合至切換單元μ的輸出端，地端(g_接地，致能端 _電氣輕合至控制單元25的其中一控制端㈣，而輸出端(〇υτ)電氣麵合 至一負載28 (個人數位助理機）。 切換單元24可為- M0S開關元件，用以將該主電池21的輸出電壓切 換至該升27而產钱驗接，該切轉元24具有兩輸人端(αι)(α2) 、-輸出端(out)及一致能端㈣，其中輸入端(Al)電氣耗合至主電池2ΐ 的正電極，輸人端(Α2)電氣齡至備用電池22的正電極，致能端(ΕΝ)電氣 ♦禺a至控制單元25的其中-控制端(al)，而輸出端(〇υτ)電氣麵合至升壓單 元27的輸入端(in)。 備用電池22主要是在電子裝置更換主電池21日夺，取代該主電池21供 應電力給電子裝置，⑽免電子裝置__的㈣消失；該制電池22 具有-正電極及-負電極，正電極與切換單以4的其中—輸人端(A2)產生 電氣耦合，而負電極接地。 控制單元25可為一複雜的可程式邏輯元件(c〇mpiex pr〇grammabie Logic Device ’ CPLD) ’用以接收電壓偵測單元23發送的訊號；控制單元 25具有四控制端㈣㈣⑻办句，且分別與切換單元24的致能端㈣、電 壓僧測單it 23的輸itj端(Gut)、降辟^ 26的雜端(EN)及升料元27的 致li^(EN)產生電氣_合；其中當控制單元25接收主電池21電壓低於設 疋之參考電壓的喊時，並控制該降壓單元％關及啟動該升壓單元π 以調升該主電池21的輸出電壓供該電子裝置使用。 在本實施例中，該供電電路最主要是提供給個人數位助理機(pDA)運作 所需之電力’其中主電池21的輸出電壓可用的範圍定義在27U42V之 間，而個人數位助理機(PDA)之主要供電定義在3 3V，因此，在一開始主電 8 1304284 池η提供的電壓大於3.w時，會藉由降壓單元％將主電池b的輪出電 壓降壓至設定的操作電壓3_3V以供個人數位助理機(pDA)使用，且當電壓 參麻23侧主電池21的龍—旦低於設定的操作糕3 3v ^即合 發送-訊號通知控制單元25，而控制單元Μ則會經由控制端㈣發送職 至切換早7L 24的致能端(EN)以控制切換單元24將主電池^的輪出電壓切 換至升壓單元27 (亦即切換單心的内部由輸人端(A2)與輸出端陶電 氣連接的狀態變更為輸入端(A1)與輸出端(ουτ)電氣連接的狀態），接著經 由控制端㈣發送訊號至升壓單元27的致能端卿)_啟雜單元27及經 由&制知㈣發送喊至降壓單元26的致能端㈣以關閉降壓單元26，而 主電池的輸㈣壓(低於3.3V)鱗即可透過傾單元進行龍至設定的操 作電壓為3.3V，並由升麼單元27的輸出端(〇υτ)提供給負載Μ裝細人 數位助理機)足夠的電壓運作；當電子裝置更換主電池21時，而備用電池 22則取代主電池21供應電力給電子裝置，待主電池21充電完之後裝入電 子裝置後，且當霞侧單元23侧主電池21的碰—旦高於設定的操 作電塵3.7V時，即會發送—訊號通知控鮮元25，而控鮮元25則會控 制切換單元24將主電池21的輸出電遷切換至降壓單元π (亦即切換單元 24 _部由輸人端⑽與輸出端(〇υτ)電氣連接的狀態變更為輸入端⑽ 與輸出端(OUT)電氣連接的狀態），接著經由控制端㈣發送訊號至升遷單元 27的致月匕知卿)以關閉升廢單元27及經由控制端㈣發送訊號至降墨單元 26的致能端(EN)以開啟降壓單元26。 9 1304284 &上所述’本發明主要是讓主電池21可直接利用備用電池22的升壓 單兀27去進行升壓，因此只需增加一切換單元24(通常為一小體積的MOS ，開關)在升屢單元27及降遷單元26間做切換，而不需另外增設升塵元件， •因而不會辟到電子裝置原本設計；再者，如此設計使電子裝置可以充分 運用到主電池21低於3.3V以下的電壓(通常使用電壓為4·2至3JV)，而可 曰力:主電池21雜的使用細(4m7V)，以延長電子裝置的使用時間 (#作電Μ原本3·7ν就要進人睡眠，也可以延長使用電壓到約再進入睡 _眠因為以則3·3至3·7ν來保持資料猶可以用2·7ν至3·5ν來保持資料。）。 惟以上所述者，僅為本發明之—健實施_已，並制來限定本發 明實施之範圍，舉凡依本發明申請專利範圍所述之形狀、構造、特徵及精 .神所為之均等變化與修飾，均應包括於本分明之申請專利範圍内。Therefore, the battery of the electronic device of the present invention, a voltage detecting unit, a step-down unit, and the element; wherein the main battery 'is used to supply the voltage required for the operation of the electronic device, the main battery has a positive electrode; Eight. The reference voltage is mainly used to reduce the output voltage _ to the reference voltage of the main battery to be supplied to the electronic device, and the buck unit has an input terminal and an enable terminal, wherein the input is electrically connected to the main device. The positive electrode of the battery and the voltage meter 70 are used to react the main battery dragon to the reference voltage of the set and send - money ' _ pressure 梓 具有 具有 has _ input terminal and - output terminal, wherein the input end electrical surface a positive electrode connected to the main battery; • a boosting unit having a reference voltage value associated with the buck unit for boosting the output voltage of the main battery to the reference voltage for supply to the electronic device, The boosting unit has an input end and a uniform energy end; the switching unit 7G can be a - MOS switching element for switching the output voltage of the main battery to the boosting unit to generate a checksum. The input end, the output end and the uniform energy end, wherein the input end is electrically connected to the positive electrode of the main battery, the other input end is electrically consumed to the positive electrode of the backup battery, and the output end is electrically coupled to the riser. Press unit input 5 1304284 Battery for strong injury, when the electronic device replaces the main battery, replaces the main battery to supply power to the electronic clothing for the battery with a positive electrode, the positive electrode and the switch single pick - the input terminal produces And a programmable logic element for receiving the voltage detection unit to transmit the track number, wherein when receiving the signal that the main battery voltage is lower than the set voltage, the control The unit switches the main electric contact output movie knife to the boosting unit, and controls the buck unit to be turned off. The starting voltage is used to reduce the output voltage of the fascinating battery for use by the electronic device. The control is 0', and there is a red system. Knowing and respectively, the output of the voltage thinning unit, the aging of the switching unit, and the enabling end of the boosting unit are combined. * [Embodiment] In order to enable the review board to further understand the structure, features and objects of the present invention, the detailed description of the drawings and the preferred embodiments is as follows: The circuit diagram of the preferred embodiment of the power supply circuit of the invention is shown in the figure. The electronic device of the present embodiment is an example of a number of digit assistants (pDA). The power supply circuit mainly has a main battery 21 and a backup battery. 22, a voltage detecting unit 23, a switching unit 70 24, a control unit 25, a step-down unit 26 and a - boost unit 27. In other variations, the electronic sorrow can also be a ceii phone, a pager, a Note Book, an electronic dictionary, or other electronic device. The main battery 21 has a positive electrode and a negative electrode, wherein the positive electrode is electrically coupled to the input terminal (IN) of the voltage detecting unit 23, one of the input terminals (A1) of the switching unit 24, and the input terminal of the step-down unit. The negative electrode is grounded; the main battery 21 in this embodiment is a lithium battery, for example, the battery has a range of 2 7V to 4 2V, and is mainly used to provide a personal digital assistant (PDA) operation. In other variations, the main battery 21 can also be (4) battery _ (four) battery (nickd cadmium battery). m (nickd hydr〇gen • coffee (9), and lithium lithium battery (polymer lithium battery) or other Rechargeable secondary battery. ... drop [Unit 26 can be a general step-down component (IC) or circuit in which a reference power is set. [Hedau test voltage is the operating voltage of the personal digital assistant (pDA). The pressing unit % is mainly supplied to the electronic device by using the output voltage of the low-level main battery 21 to the reference; the step-down unit % has - input terminal (four), an output terminal (0UT), a ground terminal (GND), and - enable End _, whose 矜h(IN) is electrically coupled to the positive of the main battery 21 Pole, ground (side ground, enable (εν) is electrically connected to one of the control terminals (4) of the control unit 25, and the output (〇υτ) is electrically coupled to a 'load 28' where the load 28 is Refers to the personal digital assistant (PDA), that is, the main battery 21 ^ (four) Lai scale solution 26 after the off to provide the 2_ number of ships); in this embodiment the personal digital assistant operating voltage It is set to 33v; however, other variant embodiments may be other set voltages g, and are not limited thereto. φ Electric [detecting unit 23 is used to react the voltage of the main battery 21 to the reference voltage of the mosquito (3.3V) And developed - signal to control unit %, the voltage gamma unit μ has an input terminal (four), an output terminal (0UT) and a ground terminal (GND), wherein the input terminal (four) is electrically connected to the positive of the main power The electrode output end (〇υτ) is electrically connected to one of the control terminals (4) of the control unit ^, and the ground terminal (GND) is grounded. The Δ 璧 it single it 27 has a reference voltage consistent with the reference voltage value of the buck unit %❸, The reference voltage is also a small number of people (4)_(PDA) is read as the voltage, and the rising element π is mainly used to raise the voltage of the main battery 21 to the The test voltage is supplied to the electronic device; the boosting unit 27 H is input to MIN), an output terminal (0UT), and a ground terminal (gm is taken as the uniform energy terminal (en), and the input terminal (IN) of the 7 1304284 is electrically combined. To the output of the switching unit μ, the ground terminal (g_ground, the enable terminal_electrically lightly coupled to one of the control terminals (4) of the control unit 25, and the output terminal (〇υτ) electrically coupled to a load 28 (personal digit) The switching unit 24 may be a - M0S switching element for switching the output voltage of the main battery 21 to the rise 27 to generate a money check. The switch unit 24 has two input terminals (αι) (α2) ), - output (out) and uniform end (4), wherein the input (Al) is electrically consuming to the positive electrode of the main battery 2ΐ, the input end (Α2) is electrically connected to the positive electrode of the backup battery 22, and the enabling end (ΕΝ) Electrical 禺 禺 a to the control terminal (al) of the control unit 25, and the output terminal (〇υτ) is electrically coupled to the input terminal (in) of the boosting unit 27. The backup battery 22 mainly replaces the main battery 21 days with the electronic device, instead of supplying the power to the electronic device, (10) the electronic device __ disappears; the battery 22 has a positive electrode and a negative electrode. The electrode is electrically coupled to the switching unit of the input terminal (A2), and the negative electrode is grounded. The control unit 25 can be a complex programmable logic component (CPP) to receive the signal sent by the voltage detecting unit 23; the control unit 25 has four control terminals (four) (four) (8), and respectively It is electrically connected with the enable terminal (4) of the switching unit 24, the input itj terminal (Gut) of the voltage measurement unit it 23, the miscellaneous terminal (EN) of the reduction circuit 26, and the Li^ (EN) of the riser element 27. Wherein when the control unit 25 receives the shunt of the voltage of the main battery 21 being lower than the reference voltage of the set, and controls the buck unit to turn off and activate the boosting unit π to raise the output voltage of the main battery 21 for the electronic The device is used. In this embodiment, the power supply circuit is mainly provided with power required for the operation of the personal digital assistant (pDA). The range in which the output voltage of the main battery 21 is available is defined between 27 U and 42 V, and the personal digital assistant (PDA) The main power supply is defined as 3 3V. Therefore, when the voltage supplied by the main power 8 1304284 pool η is greater than 3.w, the voltage of the main battery b is stepped down to the set operation by the buck unit %. The voltage 3_3V is used by the personal digital assistant (pDA), and when the voltage of the main battery 21 of the side 23 is lower than the set operation cake 3 3v ^, the transmission-signal notification control unit 25, and the control unit Μ Then, the control terminal (4) transmits the activation end (EN) of the early 7L 24 to control the switching unit 24 to switch the driving voltage of the main battery ^ to the boosting unit 27 (that is, the internal of the switching single heart is input by the input unit) The state in which the terminal (A2) is electrically connected to the output terminal is changed to the state in which the input terminal (A1) is electrically connected to the output terminal (ουτ), and then the signal is sent to the enable terminal of the boosting unit 27 via the control terminal (4). Initiating unit 27 and sending a call to buck via & The enable terminal (4) of the element 26 is used to turn off the buck unit 26, and the input (four) voltage (less than 3.3 V) of the main battery can be used to perform a dragon to the set operating voltage of 3.3 V through the tilting unit, and the unit 27 is raised by the unit. The output terminal (〇υτ) is supplied to the load-mounted fine-numbered assistant machine for sufficient voltage operation; when the electronic device replaces the main battery 21, the backup battery 22 replaces the main battery 21 to supply power to the electronic device, waiting for the main battery 21 After charging the electronic device, after the charging of the main battery 21 on the side of the side unit 23 is higher than the set operating electric dust 3.7V, the signal will be sent to notify the control element 25, and the control element 25, the control switching unit 24 switches the output of the main battery 21 to the step-down unit π (that is, the state in which the switching unit 24_ is electrically connected by the input terminal (10) and the output terminal (〇υτ) is changed to the input terminal (10). a state of being electrically connected to the output terminal (OUT), and then transmitting a signal to the promotion unit 27 via the control terminal (4) to turn off the up-and-down unit 27 and send the signal to the ink-removing unit 26 via the control terminal (4) The energy terminal (EN) turns on the buck unit 26. 9 1304284 & described above, the present invention mainly allows the main battery 21 to directly use the boost unit 27 of the backup battery 22 for boosting, so that only one switching unit 24 (usually a small volume of MOS is added). The switch) switches between the lifting unit 27 and the transition unit 26 without additional dusting components, and thus does not open up the original design of the electronic device; further, the electronic device can be fully utilized to the main battery. 21 is lower than 3.3V (usually using voltage is 4·2 to 3JV), but can be used: the main battery 21 is used fine (4m7V) to extend the use time of the electronic device (# for the original 3) · 7v is about to enter the sleep, you can also extend the use of the voltage to about to go to sleep again. Because the data is kept from 3·3 to 3·7ν, you can use 2·7ν to 3·5ν to keep the data.). However, the above description is only for the purpose of the present invention, and is intended to limit the scope of the practice of the present invention, and the shapes, structures, features, and variations of the scope of the present invention are equally varied. And modifications should be included in the scope of this patent application.
10 1304284 【圖式簡單說明】 . 圖一為習知電子裝置的供電電路實施例之電路示意圖。 . 圖二為本發明電子裝置的供電電路較佳實施例的電路示意圖； 【圖式之主要元件代表符號說明】 11 · ·主電池 • 12 · ·備用電池 13 ··降壓元件 14 ··升壓元件 • 15 · ·負載 • 21 · ·主電池 22 ··備用電池 23 ··電壓偵測單元 _ 24 ··切換單元 25 ··控制單元 26 ··降壓單元 27 ··升壓單元 28 · ·負載 1110 1304284 [Simple description of the drawings] Fig. 1 is a circuit diagram of an embodiment of a power supply circuit of a conventional electronic device. 2 is a schematic circuit diagram of a preferred embodiment of a power supply circuit of an electronic device according to the present invention; [Description of main components of the drawings] 11 · · Main battery • 12 · · Backup battery 13 ··Step-down element 14 ·· Pressing element • 15 · · Load • 21 · Main battery 22 · Backup battery 23 · Voltage detection unit _ 24 · · Switching unit 25 · · Control unit 26 · · Step-down unit 27 · · Boost unit 28 · ·Load 11