200534564 九、發明說明： 【發明所屬技術領域】 • 本發明係關於一種，馬達驅動φ … 電路，馬達驅動電路及半導體裝置，且雕力卞^晶體保護 單極（ιπφοΜ (半波）_ s ’係關於在 晶體之輸出端子與馬達之激磁線圏進之 器’當功率電 防止功率電晶雜受到破壞之馬：：：：：態時’可 護電路。 勒电路之功率電晶體保 >【先前技術】 早極㈣之步進馬達驅動器（脈波 由"目驅動、…相驅動 力:）係稭 進行旋轉。 ^起㈣之轉子僅以預定之旋轉角 流出用以激磁各定子 接於電源線，並捲繞於動器’係對於達 晶體（輪出段電晶體）以久相_ 線圏）’將功率電 以預定的㈣令設s於該線圏。 〇n/〇FF之方式，將定：二/應之功率電晶體進行 動。 、子依序激磁，而將步進馬達予以驅 當某相之功率電晶體〇N時，利用藉由 圈的電感與功率電曰邮笪+ > ^ /敫磁、、泉 、 ^ 日日^寻之阻彳几所決定之預定時間常對的 過，現象’於ON的期間依序增加驅動電流。為了將該增 加！限制到預定值，令功率電晶體從ON的狀態，在預‘ 的期間後⑽之方式’控制使功率電晶體不會有過電流流 3I6662 200534564 過。因此，功率電晶體通常係在〇n/〇ff之“η” 位準）、“L”（L0W位準）的邏輯值脈衝，藉由斬波 (chopping)驅動各相之脈衝。 並已；有利用σ十打電路設定並控制ON期間之斬波 控制之3相馬達驅動器及j G B 丁功率電晶體之保護電路作 為上述脈衝驅動控制的丨種（特許文獻。 [特許文獻1]曰本特開平u_112313號公報 【發明内容】 [發明所欲解決之課題] :般係以過電流保護電路或電流限制電路做為前述功 率黾晶體之保護電路。鈇 ^ ^ …、，虽馬達驅動之驅動器被Ic 二：之激磁線圈之端子連接在輸出端子，而 :生：出端子與馬達的連接不良。且由於在馬達等有轉而 子因此也會發生激磁線圈的斷線等。 而且，在馬達驅動電路等 ，合 態等令功率電晶體之輸心曰口為冰波或驅動狀 狀能H心 個端子’瞬間成為開放 厂、*易因榀測出端子的開放狀態而發生執行斷峻於 測之誤檢測，而使 執仃m 致無法成為實用者。因此二:動動作受到影響’以 路。 b未見有對於該種斷線之保護電 連接不_ —焉達驅動為’即便係當發生輸出端子中的1個 連接不良或激磁線圈的、 個 時，因為無法在連接於成為：：之：：達的驅動。此 生反電動勢，使得該部之端子的激磁線圈產 之-电〜增加於流入其他之激磁線 3 3 6662 7 200534564 ，：：电•’俾使驅動器整體在過負載狀態下，持續 驅動。因此使得功率電晶體受到破壞，而甚、:馬達的 遭到破壞的原因。 成為ic本體 本發明之目的，係為了解決上述 而提供一種馬達驅動電路之功率電晶體=問相， 動電路或半導體裳置，其係當從功率電二隻：路屮馬達驅 體遭到破壞。 ^之财斷柄，可防止功率電晶 [用以解決課題的手段] 電曰二佯：Ϊ上这目的之第-發明之馬達驅動電路之功率 电日日體保護電路，黾；告 刀手 於透過輸出端子，將㈣。电或半導體裳置的構成，係 率電晶㈣…：電流輪出到馬達之激磁線圏的功 旦ί應方；稷數個激磁線圈而 電路中之功率電晶體保護電路，此功率驅動 備，端子開放檢測電路、斷線檢測電路及驅動豆2電=具 、而端子開放檢測電路係設在，沒有之 各激磁線圈的另-方之端子及該另而子之 路的任一方盥且右$ *子所連接之線 …、方端子之激磁線圈所連接之輪出_ 子或该輸出端子所連接之線路的任一另一方之門：“ 设置成對應於複數個 ^ 为別 “之輪出動作時，檢測任 ^動 開放狀態； 万”任$方之間是否為 一方1^:測电路’係根據端子開放檢測電路檢測出在任 方之間/又有成為開放狀態，爾後卻檢測為 316662 200534564 開放狀態時，則於 测為斷線狀態的任一狀態； 驅動停止電路， 態時，將馬達驅動^康該斷線檢測電路檢測出咖大 第二發明，二,驅動動作予以停止者。 執行驅動電流之輪子開放檢測電路於功率電晶體 „ ^ 御出動作時，檢測任一方與任一另一 士々 間為開放狀態或連接狀態者； 方之 别述斷線檢屮带 測出為開放狀態“接狀=照=據=子開放檢測電路檢 次開放狀態時，則為卜^、白、j壬狀悲’當檢測出有複數 貝J為榀測出斷線狀態。 [發明效果] ' 、P| Ϊ上所，在第H端子開放檢測電路#用以柃 測，當功率雷曰娜以/ ^吩你用以檢 於輸二 子所連接的線路(任一方)、二：端子或該另-方之端 戋嗲浐出/早％、击4 >、4應。激磁線圈之輸出端子 幸則出而子所連接之線路（任一另-方）之間，曰不主 開放狀態。再者，在 ^又間疋否為 能^ 而子開放檢測電路未成為開放狀 心’爾後部檢測為開放狀態之狀態做為斷線檢測。 料m係每次功率電晶體執行驅動電 ::輸出動作時’先測出端子間沒有開放的狀態，之= /、!ί在钛子間有開放狀態之狀況， ..y 別出攸/又有開放之狀離 成為開放狀態的變化。而且第一發明，係以端子 ； 放狀態與開放狀態作為檢測條件下，並檢測實質上^子^ 的開放狀態是否持續到之後的驅動f流之輸出時。 另-方面，第二發明之端子開放檢測電路，係當功率 316662 9 200534564 一執行驅動電流之輸出時，檢測出 ::—方之間的開放狀態或連接狀態的任—狀==與 者，_據端子開放檢測 ：。接 態的任-狀態，當/為開放“或連接狀 崎妝能、， 、 -人竭放狀態時，為檢測出 線狀恶，亚以此作為斷線檢測。 柷’'_ 時作之:崎，理當係以所測之沒有連接狀態 為'’相反地將測出為未成開放狀態時，即作 以該等複數的條件，判斷為斷 之誤檢測，且不會影響馬達電晶體電:二動 確實地檢測出斷線。於是，可於斷線時，令馬=二： 路之驅動動作停止。 運电日日肢电200534564 IX. Description of the invention: [Technical field to which the invention belongs] • The present invention relates to a motor-driven φ… circuit, a motor-driven circuit and a semiconductor device, and the engraving force 卞 ^ crystal protection unipolar (ιπφοΜ (half-wave) _ s' It is about the device that enters the output terminal of the crystal and the exciting line of the motor. "When the power is protected, the power transistor will not be damaged. :::::" state, it can protect the circuit. [Prior technology] The stepping motor driver of the early pole (pulse wave is driven by the "mesh drive, ... phase drive force:") is used to rotate. ^ The rotor from the rotor only flows out at a predetermined rotation angle to excite each stator connection. In the power line, and wound around the actuator 'is a long-term phase of the crystal (wheel out of the transistor) _ line 圏)' Set the power to the line 以 with a predetermined command. 〇n / 〇FF method, will determine: two / should be power transistor operation. And sub-magnets are sequentially excited, and the stepping motor is driven by a phase power transistor of 0N, and the inductance and power of the coil are used to describe the post + + ^ / 敫 magnetic,, spring, ^ day ^ The predetermined time determined by the search resistance is often over, and the phenomenon 'the driving current is sequentially increased during the ON period. To increase it! Limit it to a predetermined value, so that the power transistor is turned from the ON state, and the power transistor is controlled to prevent the overcurrent flow of the power transistor 3I6662 200534564. Therefore, power transistors are usually pulsed at logic values of "n" (on / n) and "L" (L0W), and the pulses of each phase are driven by chopping. And already; there are three-phase motor drivers that use σ ten dozen circuits to set and control chopping control during the ON period and j GB D-type power transistor protection circuits as the above-mentioned types of pulse drive control (chartered literature. [Licenced literature 1] [Japanese Patent Application Publication No. u_112313] [Summary of the Invention] [Problems to be Solved by the Invention]: Generally, an overcurrent protection circuit or a current limiting circuit is used as the protection circuit of the aforementioned power / crystal. 鈇 ^ ^…, although the motor is driven The driver is connected to the output terminal by Ic 2: the excitation coil terminal, and the: connection: the connection between the output terminal and the motor is poor. Also, there is a disconnection of the excitation coil due to a rotor in the motor and so on. In the motor drive circuit, etc., the state of the power transistor is ice wave or driven. The terminals of the H core can be opened immediately, and it is easy to break due to the open state of the terminal. The erroneous detection caused by the test makes the 仃 m unable to become a practical person. Therefore, the two: the movement is affected, and the road is not affected. B No protective electrical connection for this type of disconnection is found. The action is' Even when one of the output terminals has a bad connection or an excitation coil, it cannot be connected to ::::: up to the drive. This back-EMF makes the terminal ’s excitation coils Production-Electricity ~ Increased in the other exciting field currents 3 3 6662 7 200534564 ：: Electric • '俾 Makes the whole driver continuously driven under overload condition. Therefore, the power transistor is damaged, and the motor The reason for the damage. To become the IC body, the purpose of the present invention is to provide a power transistor of a motor drive circuit = phase, dynamic circuit or semiconductor device in order to solve the above. The motor drive body is damaged. The power handle can prevent the power transistor [means to solve the problem] Electricity second: the first invention of the motor drive circuit of the power protection Circuit, 黾; the hand of the knife through the output terminal, the structure of electricity or semiconductors, the rate of electric crystal ㈣: the current wheel to the motor's excitation line 圏 the response; 稷 number The power transistor protection circuit in the circuit of the excitation coil. This power driver is equipped with a terminal open detection circuit, a disconnection detection circuit, and a drive circuit. The terminal open detection circuit is provided. -Each side of the square terminal and the other side of the road is connected to the right side of the line. * The line connected to the square ..., the round terminal connected to the field coil of the square terminal, or any other line connected to the output terminal. The door of one side: "Set to correspond to a plurality of ^ for other" wheels, detect the open state of any movement; 10,000 "whether there is a party between the two sides 1 ^: test circuit 'is based on the terminal open detection circuit When it is detected that it is open between any parties, and then it is detected as 316662 200534564 Open state, then any state that is measured as a disconnected state is measured; When the stop circuit is driven, the motor is driven when the state is broken. The detection circuit detects the second invention of the cafe. Second, the driving action is stopped. The wheel open detection circuit that executes the drive current is detected in the power transistor. ^ It is detected that either party is open or connected between the other and the driver; when the disconnection detection band is described as In the open state, “connected = photo = data = sub-open detection circuit, when the open state is detected, it will be ^, white, and j.” When a plurality of shells are detected, J is a disconnected state. [Effect of the invention] ', P | Ϊ On the place, the detection circuit # is opened at the H terminal to measure. When the power is used, you can use it to detect the line (either side) connected to the input two. Two: The terminal or the other-side end is pushed out / early%, hit 4 >, 4 should. Fortunately, the output terminal of the exciting coil is out of the open state between the lines (any other side) connected by the child. In addition, whether the sub-open detection circuit is not open at ^ and ^ is not detected, and the state where the rear portion is detected as open is used as disconnection detection. It is expected that each time the power transistor executes the driving power :: output operation, 'the state between the terminals is not open, and == ,! ί the state between the titanium is open. .. There is also a change in the state of opening to become open. Moreover, the first invention uses the terminal state and the open state as detection conditions, and detects whether the substantially open state continues until the subsequent output of the driving f-flow. On the other hand, the terminal open detection circuit of the second invention detects when the power 316662 9 200534564 is performing the output of the driving current and detects the state of the open state or connection state between the parties: == and _According to terminal open detection :. In the connected state, when / is open "or the connection is connected, and when the person is exhausted, in order to detect a linear evil, this is used as a disconnection detection. 柷 '' _ When done : Saki, when the measured unconnected state is the contrary, the measured unopened state will be judged as a false detection based on these plural conditions without affecting the motor transistor. : The second action reliably detects the disconnection. Therefore, when the disconnection occurs, let the horse = two: the driving action of the road stops.
，當功率電晶體在執行驅動電流之輸出動作時， =恆㈣放狀態或未成開放狀態之檢測，該檢測時，不 電流流過馬達之線圈的關係，瞬間的雜波或驅動 寺的變化，而受到影響。尤其係在，如對應於驅動電 流之限制電流值之較接近於電壓值處，進行是否 態的檢測，則可得不易受到對於瞬間的雜波或瞬間開放狀 態之影響的檢測。 結果，由於可立即檢出從功率電晶體之輸出端子到馬 達之激磁線圈的另一端之間有斷線時之情形，並可防止功 率電晶體受到破壞。 【實施方式】 [實施發明的最佳形態] 316662 10 200534564 第1圖為適用本發明之馬達驅動電路 護電路的-實施例之單極驅動之步進馬達^晶體保 圖’· f2圖為功率電晶體保護電路之動作時序方塊 弟1圖中’ 10為4個激磁線圏之單 驅動器K：。於該IC設有單相驅動電路^重之步進馬達 二個輸出端子2a、2b、2c、2d、：： Π之激磁線圈lla' llb、ilc、Ud。 b達馬達 該等激磁線圈心⑽叫卜山連接 12之電源線13,並由該電料接 7、电磁） 激磁線圈Ha，、llc，，分別將飛二。：於各 diode)以並聯而連接。 flywheel 電源12 ’係經由端子2e將電力供給於 調節電路（REG)2,並經由咖2將在内部:的電屋 電路。 ）思力，达出到各種的内部 單相驅動電路la、lb、lc、ld， 電路所構成，所以其詳細構造僅以單向驅動；二 :乂下’就單向驅動電路1&進行說明，而單向驅動電路：。 k、id為同樣的構成，因此將其說明予以省略。-路ib、 兹就單相驅動電路la進行說明之。該單相驅動 由.N通道M0SFET功率電晶體3、功率電晶體 h :、電流限制電路5、以及基準電壓生成電路6所構成= ，了祝明的方便’將各單相驅動電路之電流限制電 放置到單相驅動電路la的點線框之外。 ， ^ 166(>2 1] 200534564 ，功率電晶體3，係以嗨托 電流輸出於輸出端子2a。功^ + 接曰'出端子2a，而將激磁 端子2f連接安裝於扣 兒日日版3之源極側，係透過 並透過該端子接地。再者，矜出別，电极檢測用之電阻RS， 激磁線圈U a匯入(Slnk)該輪:出:子子：〜輪出電流，係由 功率電晶體保護電路係由：檢_二二。 …與輸出端子2a之開放狀 ^ 12之電源線 斷線檢測電路朴所構成。 而于開放檢測電路4a、及 1 一端子開放檢測電路4a，仙以檢 前述激磁線圈lla之電源線_之端子^出―端子2a與 的電壓，而檢測出該等…另方的端子） 八茂帝 B為竭放狀態者，且係由·命 刀1¾路44、電阻分壓電路45、以及 ’、.私 電阻分堡電路㈣由，連接於輸出端子2^^所構成。When the power transistor is performing the output action of the driving current, the detection of the constant discharge state or the open state is not performed. During this detection, the relationship between no current flowing through the coil of the motor, instantaneous clutter, or changes in the driving temple, Affected. In particular, if the limit current value corresponding to the drive current is closer to the voltage value, and whether the state is detected, the detection that is not easily affected by the instantaneous clutter or the instantaneous open state can be obtained. As a result, a disconnection from the output terminal of the power transistor to the other end of the magnetizing coil of the motor can be detected immediately, and the power transistor can be prevented from being damaged. [Embodiment] [The best form for implementing the invention] 316662 10 200534564 The first figure is a stepping motor for unipolar driving of the embodiment of the embodiment of the motor drive circuit protection circuit of the present invention. The timing sequence of the operation of the transistor protection circuit is shown in Figure 1. '10 is a single driver K of 4 excitation lines. The IC is provided with a single-phase driving circuit and a stepping motor with two weights. The two output terminals 2a, 2b, 2c, 2d, and: are the exciting coils 11a, 11c, and Ud. bDada motor The core of these excitation coils is called the power line 13 of Bushan connection 12, and the electrical material is connected to the 7. Electromagnetic) The excitation coils Ha, and lc, will fly two respectively. : Connected in parallel to each diode). The flywheel power source 12 ′ supplies power to the regulating circuit (REG) 2 via the terminal 2e, and will be internally connected to the electric house circuit via the terminal 2e. ) Silicom has reached a variety of internal single-phase drive circuits la, lb, lc, ld, and the circuit is composed, so its detailed structure is driven only in one direction; two: His Majesty's description of the one-way drive circuit 1 & , And one-way driving circuit :. Since k and id have the same structure, their descriptions are omitted. -The circuit ib and the single-phase driving circuit la are described below. This single-phase drive consists of .N-channel M0SFET power transistor 3, power transistor h :, current limiting circuit 5, and reference voltage generating circuit 6 =, for the convenience of Zhu Ming ', limiting the current of each single-phase driving circuit The electricity is placed outside the dotted wire frame of the single-phase drive circuit la. ^ 166 (> 2 1] 200534564, power transistor 3, is output to output terminal 2a with Hitor current. Work ^ + Connect to 'output terminal 2a, and connect the excitation terminal 2f to the Japanese version The source side of 3 is grounded through and through this terminal. Furthermore, the resistance RS for electrode detection, the excitation coil U a sinks into (Slnk) this round: out: son: ~ current out, The power transistor protection circuit is composed of: detection_22... And the open state of the output terminal 2a ^ 12 power line disconnection detection circuit pu. And the open detection circuit 4a, and 1-terminal open detection circuit 4a, Xian detects the voltage of the terminal of the power supply line _ of the aforementioned exciting coil 11a, the voltage of terminal 2a and detects these ... the other terminals) Ba Maodi B is exhausted, and the order is The knife 1¾ circuit 44, the resistor divider circuit 45, and the private resistor divider circuit ㈣ are formed by being connected to the output terminal 2 ^^.
之間的電阻Rl、R2所福#予 /、地線GND m. 所構成。電阻分壓電路45係由：透過 而子1 ’將一方連接於電源線13 _^^3、R4_H 方連接於地線 之的（+ )輸人，係連接於電阻分壓電路料 %勺連接點，並承受連接點的分壓電壓Va。其（―） ==電阻分壓電路45之電阻的連接點:並承受 出且外。在达理’產生功率電晶體3的輪 、、*该輪出到達預定之驅動電流值時’輸出端子。 即成為回應該電流值的電壓值’而形A Va>Vb。此時，比 較器广，輸出❶’，成為“L”。亦即，當比較器：為 寸產生表示 L時產生輸出電流之“ L”為有、、系 3]6662 12 200534564 意之輸出檢測脈衝（參照 係用以表示端子開放檢測電路4a^::;， 圈lla之另-方的端子為連接狀態而輸出之檢二 ，：輸出檢測脈衝，係表示該等端子為未成二;放： 若未生成純諸祕衝，職㈣力作時， 在此，如第2图⑺α 一 ~同双狀恶。 定成垃W 回)斤不，將分壓電壓Vb的電壓Μ ;”：驅動電流之限制電流值的㈣值（低5%至2二 处)b 5又疋，當功率電晶體3執行驅動電漭於 時，若檢測輸出端子2a是否為 /瓜剧出動作 電流接近對應於限制電流值 時:該驅動 能今心A 士 值可多而子是否為開放壯 心之動作k，由於驅動電流持續流人馬違之線圈 二樣狀態的檢測不易受到雜波或瞬間開放狀態的‘ 線檢測電路4b係由’比較器40與8進位計數哭如 端子㈣出的一。比較 :受來自共通設置於單相驅動電路u、ib、lc、】d心 白電！產生電路6的比較基準電厂請，(―）輸入則接受 1 ^而子開放檢測電路4a的檢測電屢信號。比較器乜的輪 係連接於8進位計數器μ的重設端子（reset :一)厌。而基準電塵羞生電路6,係成為可藉由雷射微 raser ir]m_g)等進行電㈣整之形態。依據該電塵調 正义，令單相驅動電路13、】卜卜]相個別比較器4(^分 J3 316662 200534564 別產生重設信號之方式 以設定其電壓VR。 δ玄重e又彳g號係由比較器46之‘‘ η” 變化為‘‘ H”時，可利用當比較器4c由 時之下降觸發信號。 變成“L” ，‘‘ ，， _ H 下降為 接著 “L” 斷線檢測電路4b，係由媼早鬥κ ^ 广, 而子開放檢測電路4a接受檢 測電壓信號’並以8進位計數器4(1將 ^ M ^ f符、、、只—疋期間呈開放 狀恶的狀悲，U時脈CLK計算之方々、仓y p ^ ^ .al ^ ^ 丁开之方式進行斷線的檢測。亦The resistance between R1 and R2 is composed of ## and ground GND m. The resistance voltage dividing circuit 45 is composed of: (+) input of one side connected to the power line 13 _ ^^ 3 and R4_H connected to the ground through the sub 1 ', which is connected to the resistance voltage dividing circuit material% Scoop the connection point and bear the divided voltage Va of the connection point. Its (―) == the connection point of the resistance of the resistance voltage dividing circuit 45: and bears out and out. The output terminal of Dali's power generating transistor 3, * when the wheel output reaches a predetermined driving current value. In other words, it becomes a voltage value 'corresponding to the current value, and the shape A Va > Vb. At this time, the comparator is wide and the output ❶ 'becomes "L". That is, when the comparator: for the inch to generate the output current "L" when the output current is "Y", there are 3] 6662 12 200534564 intended output detection pulse (refer to the system used to indicate the terminal open detection circuit 4a ^ ::; , The second terminal of the circle 11a is connected and the output is detected. The detection pulse is output, which means that these terminals are not binary. Put: If pure secret punches are not generated, when you work hard, here, As shown in Fig. 2 一 α a ~ double-evil evil. Set it as W W)) If not, the voltage M of the divided voltage Vb; ": the value of the limiting current value of the driving current (lower 5% to 22) b 5 Also, when the power transistor 3 is performing the driving, if the output terminal 2a is detected, the operating current is close to corresponding to the limit current value: the driving energy can be much more Whether it is the action of opening up the heart k, because the drive current is continuously flowing, the detection of the two coil states is not easy to be affected by clutter or the instantaneous open state, and the line detection circuit 4b is composed of the comparator 40 and the 8-bit count. Out of 1. Comparison: by a single-phase drive Road u, ib, lc,] d heart white electricity! The comparison reference power plant that generates circuit 6 please, (-) input accepts 1 ^ and the detection signal of the sub-open detection circuit 4a is repeated. Gear train connection of comparator 乜It is tired at the reset terminal (reset: 1) of the 8-bit counter μ. The reference electric dust generator circuit 6 is in a form that can be electrically adjusted by laser micro raser ir] m_g). According to the electric dust Correct the adjustment, so that the single-phase drive circuit 13] [Bubo] phase individual comparator 4 (^ min J3 316662 200534564 Do not generate a reset signal to set its voltage VR. Δ 玄 重 e and 彳 g number is by the comparator When the “η” of 46 changes to “H”, the falling trigger signal when the comparator 4c changes from time to time can be used. It becomes “L”, ”, and _H drops to“ L ”disconnection detection circuit 4b, This is caused by the early morning battle, and the sub-open detection circuit 4a accepts the detection voltage signal and uses an 8-bit counter 4 (1 to ^ M ^ f characters, ,,, and only show an open-like evil during the period, U The detection method of the clock CLK, yp ^ ^ .al ^ ^ Ding Kai is used to detect the disconnection.
即’斷、.泉仏測^ |虎，係在8進位計數器計算終了（， 或向8以上加算計數）時產生。藉此，在 有執㈣動Μ之輸出動作的期間產生斷線檢測由 此，辦線檢測彳§號可不受：^ f曰；^ 1 鄕 又力丰电日日肽3之動作中的雜波影 響0That is to say, “断,. 泉 仏 测 ^ | Tiger” is generated when the 8-bit counter finishes calculation (or counts up to 8 or more). As a result, disconnection detection occurs during the output operation of the active M. Therefore, the number of line detection can be prevented from: ^ f said; ^ 1 Wave effect 0
可是’驅動功率電晶體3的閘極驅動脈衝之周期TG 為TG< 8x T，且T為時脈CLK的周期。在此，周期κ 係例如’設定為8進位計數器4(1之6計數A 的周期。 比較器4=有在比較器46產生“L，，之輸出檢測脈 ”％ ’產S Η之輸出脈衝（重設脈衝），將8進位古十數 器4d重設（reset)。由此，8進位計數器判即從〇開始立叶 數。且由於在比8x T稍前產生下一個閘極驅動脈衝二斤 以藉此產生功率電晶體3的輸出電流。並且只要有該電流 之產生，8進位計數器4d即繼續重設。結果，就不會產生 8進位計數器4(3之8計數終了信號。 曰 在泛裡，當從電源線1 3側的激磁線圈】】a之端子到輪 316662 14 200534564 出端子2a之間產生斷線時， 電壓變成地線_電位，，電路Μ的分麼 檢測脈衝，例如即便產生 “ Μ所產生的輸出 產生了問極驅動脈衝，於功率電晶體 3不產生輻出電流的情形，即雄‘ 訊m、庙输4士 幸乂 σσ 4c之軔出脈衝（重 痛）便維持在“L，，的狀態，使得δ進位計數器化， 之輸出脈衝重設。結果，在沒有產生功率 电曰曰13之輸出電流時’則產生8進位計數器4(1之8計數 終了仏號。該8計數終了信號即作為斷線檢測信號。 “為驅動停止信號產生電路’係由，或開（⑽帥) 2舁問鎖電路(】atch Clrcuit)43構成。接著 路 la、lb、lc、ld 夕 s、佳 ^ 進位计數裔4d的最終段之8計數 、、、了心5虎Η作為斷線檢測信號，經由或閘（c〇r胖^)42 :閃鎖電路43接受。藉此，閃鎖電路43係將“十數終了 仏號‘H”接受為“r，，並按照時脈clk將關於該驅動 停止信號產生電路之激磁線圈lla至Ud的邏輯和 以閂鎖。 "儿 ，當斷線檢測信號（T )被閃鎖時，將來自閃鎖電路 4 3 ^ “11作為驅動停止信號S P而施加於相激磁信號生 成电路9。藉此，令相激磁信號生成電路9停止其動作。 再：’山經由端子RS輸入重設信號“1”於問鎖電路43之 重設端子R時，使得閂鎖電路43的值通過‘‘ 〇”而清除 (clear)。而於該問鎖電路43的初期狀態，則係依據^ ^設 信號設定成“〇” 。 316662 15 200534564 在ι裡田攸电源線13侧的激磁線圈丨“ 出端子2a之間發4而子到輪 ^ "断、、表可，由8進位計數器4ά產生蔣δ 計數終了信號(“Η” )作為斷線檢測信號，而將“I，生 ^閃鎖電路43，以停止相激磁信號生成電路9的動作Ί 此，可使步進馬達驅動IC1()， 作寿曰 到破壞。 力1Cl。，尤其疋功率電晶體3不會遭 斷線檢測信號亦可使用δ進位計數器^的溢位 丨Uverflow)信號或進位（⑽幻信號。 電流限制電路5係由，比較哭5 路外構成。比較器5a的(二以及基準電壓產生電 + 端子係與端子2f連接， ^以，成電路5b，係設在IC外部，並透過端子 於比較盗5a的（―）輸入端子，而將基準電壓v咖 -加於（-）輸入端子。將輸出 :子電壓（端子2f_)作為Vs，則 ㈣動電流（輸出電流）增加，而於功率電晶體3;生1 > =超過基準電壓VREF的輪出電流時，換言之產當生^ Ψ J 1乂态5a產生檢測脈衝S。該檢 狀衝S即施加於斬波脈衝產生電路7，令“『 衝P成OFF (由“H”成為“L，， 斬波月氏 砗 」的同％，驅動〇FF計 由此，令功率電晶體3成為叫其動作容後 斬波脈衝P的停止時間（“L”的期間），係由⑽ ::設定之⑽計時電路8予以計算，且於一定期間後’ 口 ’ Z^sec俊，斬波派衝P由“『成為“L”。該斬 316662 16 200534564 波脈衝P係在例如，3 〇 的期間之間成為“Η”夕r 5〇"Sec程度的範圍所選擇 ' H之脈衝。亦即，斬波脈衝P係使 之脈衝依照檢測脈衝s成為“ l ” 後，成為“『之狀態，作為斬波脈衝而生成、。疋. =，電流限制電路5，係當電阻以之端子電麼％ 3 贿時，令驅動電流停止，並限制功率電晶體 3的輪出電流。^机 …刀千电日日 呈5達+日一”、、’將電流限制電路5設置作為兼 /、馬達·电晶體電路之過電流保護電路。 裳 在％定狀態，‘‘ Η，，之你、士 π β 號生成電路9 “IJt —斤波脈衝ρ被送出到相激磁信 ^ ^ 歹1 〇，藉由與閛（AND gate)於相激磁作於 生成電路9取得單相驅動帝枚】 兹1口唬 及與邏輯（AN 私a之閘極驅動脈衝之“H” 、铒（AND I0glc)，並輸出 照第2圖（aWh、、 + Μ力卞电曰曰體3之閘極（參 於問極這裡’係由相激磁信號生成電路9 ]極驅動脈衝的“ ρ·，，细門 、 晶體3 % ^ A J間，以預定的頻率將該功率電 遮斷之斬波脈衝（ 羊电 電晶體3。於斬波脈衝Ρ為“L” 率 為“L” ^ ^ 马L的柃候，閘極驅動脈衝成 11之·.㈣圈〗：體1被0FF，而停止對於 勒綠圈11 a的驅動電流。 所以^W在各激磁線圈並聯設有飛輪二極體D， 77 乂冰於各激磁線圈lla、m 於新波脈衝"“L”…間，二各:之電流， 流通。而哕兩_ Π如通過氣輪二極體而 的閼“艮據斬波脈衝Ρ在⑽期間與OFF期門 ’關係而決定之平均電流。 功間 在這裡’斬波脈衝產生電路7與俯計時電路8，係 17 1 Ϊ6662 200534564 對應於單相驅動電路la、〗b、卜 等電路，對應於各單相驅動電路】a、;广而設’且藉由該 圈‘驅動，分別生成斬波脈衝P， 到二…之激磁線 電路9。 出到相激磁信號生成 相/放磁仏唬生成電路9，係按照^ 動、1相-2相_、2相_# °相線圈早相驅 驅動電路h、^…之各:力率 衝的電路，並產生“Η” 日日肢3之閘極驅動脈 為了限制酿叙千、* 、 之閘極驅動脈衝。再者， 之“Η”的期ΓΓ、，藉由個別的斬波脈衝Ρ將各閘極脈衝 時崎的周期^ =2圖為功率電晶體保護電路4之動作的時序圖。 該脈種-為圖J:)為早相驅動電路1a的閘極驅動脈衝，當 圖二”、、 的期間，則功率電晶體3被斬波驅動。第2 ^ )為其斬波脈衝P，於該斬波脈衝的“H”的期間之 曰h由於對於步進馬達u之激磁線圈m流入驅動電流， ^ 乂輸出多而子2a之輸出電壓v〇m會形成如第2圖（c )所 7]^ 〇 在這裡，假叹依照第2圖（a )的閘極驅動脈衝，令單 相驅動電路1 a之功率兩 、， 刀+兒晶體3產生輸出電流。此情形時， 當比較器46係依昭輪ψ山 μ…、細出端子2a的電壓，將該電壓分壓之 分壓電壓Va超過分原：+同 / & 、i刀& %壓Vb (苓照第2圖（d ))時，由 於會從“H，， 成為“τ，，a认， 力乂句 L 的輸出，如第2圖（e)所示，依 照第2圖（c)的輪屮心_ 制出古而子2a之電壓Vout，使得其輸出脈 316662 200534564 m 衝成為 “Η” 、 “l” 、 “H，，、“” .由於斬波脈衝P的周期比時脈CLK^周白^檢測脈衝。 ,器4c即按照比較器46之#、周』更小，所以比較 •衝，產生“Η”之輸出（重設脈徐、， L的輸出派 予以重設。藉此，令問鎖 而將8進位計數器4d .4 ώ ]麵电路43維持初期值‘‘0，，沾业处 使相激磁信號生成電路9持續動作的狀恶， SP。 、 產生驅動停止信號 此時產生的比較器46之“L” 衝，係對應於第2圖（a) ，取後之輸出檢測脈 ^)之閘極驅動脈衝下降所兩羊 斬波脈衝p而產生。接下來產生的比較哭46之所=間之 出檢測脈衝，職對應 j L的輸 初的斬波脈衝P。此時的比較器 衝的產生期間，比8進位計時器4 知出檢測脈 8x T更短。於是，口+ ° r之8時脈的期間 γ羊$〇入+山 ^要伙笔源線〗3側的激磁線 化子到輸出端子2a之間沒有斷線 /圈山之 者，8進位f 成電路9的驅動停业信號SP。再 者進位计¥ 4d的計時期間， 檢測脈衝到1次的庐釦於山μ 而有仗刚述琅後的輸出 即可。 的取讀出檢測脈衝之期間以上的長時間 另一方面，因與步進馬達u的連 線η側的激磁線圈lla的端子到輪出 而從電源 時，則即便係括日π网# s 4 a之間有斷線 电日日胆3卞以驅動時，也不會產生輪出 力干 2圖（c )之後半所干， ；，L灰疋，如第 所不“產生輸出端子乃的電壓V〇m。 316662 ]9 200534564 因此：壓電墨Va即成為ν々〇ν。 結果，成為Va<Vb，且由比較器4 脈衝，則維持在“H” 生輛出檢測 日士哭ZM 4 的狀怨。由此，不需重設8進位舛 守口。d，就叶數時脈CLK。在此， 。 時，比較哭46 π八十 座生八— 人的輪出電流 46不會產生“L，，的輪屮扒、目^ % 來自8進位計日士 的知出仏測脈衝，所以，將 、 位。十4裔4d所產生的8計時終了信泸“Η”、头、 或閘42(〇Rgate)，將該信號在問鎖電路“作:而^ 以問鎖。由此，因相激磁信號生成電路9的動作停止: 以，步，馬達驅動ICl〇不會遭到破壞。 此時，來自8進位計時器4d的8計時终了作 檢測信號）最好有，於下— 、13 a (斷線 查…。下—人的輪出電流產生期間，由比 幸乂為46產生複數個“L，， 輪 疋翰出榀測脈衝之期間以上的真 度。在這裡，到8進位計數哭从μ。 白勺長 八…“ 朴的8計數終了的期間，倍 刀職各單相驅動電路la、lb、lc、， 自 =極驅動脈衝的發生周期更長的值。藉此，可連續檢： 出超過閘極驅動脈衝之】周期以上之端子開放狀態。' 再者，或閘（⑽gate)42由於心邏輯和 動電路la、lb、lc、Id的8谁仞4也 軀 進位计數器4d之最終段所得 的8计數終了信號（斷線檢出信 動電路 — — 個8進位計數器4d產生8 3、冬了信號(斷線信號)，招激磁信號生成電路9的動作 逛疋停止。 、隹/前述實施例中，係以從8進位計數器4d的重設到8 進位計數器_數終了的期間作為δχτ，相對於此， 316662 20 200534564 户、 •則將閘極驅動脈衝的周期TG作為6x T。於此，只要是表 不柒子開放檢測電路4a之連接狀態的檢測信號沒有產生、 ' 一次，則以此作為產生了端子開放檢測信號，而藉由斷線 , 檢出電路4d判斷為斷線。 ♦ 。然而，本發明中，例如，計數8進位計數器4d的計數 器可^ 13進位計數器或計數13以上之計數器。此時，若 =不纟而子開放檢出電路4a之連接狀態的檢測信號沒有連 ·、—產生複數_人日^ ’即遇定為端子開放檢出信號為連續產生 複數-人者，而此時才由斷線檢測電路判定為斷線。藉此， 可使斷線判定更為確實。 …換。之，本發明係相對於閘極驅動脈衝的周期TG， ^十時器4d的重設到計時終了的期間，#超過該周期的2 倍’即可作為斷線判定。 再者’斷線檢測電路4b，即便係沒有連續性地檢測出 ^而子開放檢測信號，而有複數次檢測出該端子開放 _唬便可判斷為斷線。 在實施Μ，比較器5a雖是分別設於單相驅動電路b ^、Id的構成較器5a亦可由複數個單相驅動 =路共通之方式設置。此時，例如，對於單㈣動電路U、 的個別的比較器5a、盥罩 ,4 一早相驅動電路1 c、1 d的個別的 比較器5a，可將輸出電流佶 之仏測电阻Rs以總共2個而 刀別予以共通化。 再且，在實施例，比較哭s °。5知將π有兩個（+ )輸入 而子作成一個，這乃是亦可蔣叩 妨比較益5的内部電路以並聯 316662 2] 200534564 ::編個比較器。且亦可使用具備(+ )輸入端 幸別入端子各有2個之比較器。 ） 。。再者，在實施例’係將斷線檢測信號作為 裔之計數終了信號，但本發明， 5十數 个〜明亚不需根據計數哭之呌奴 〜了信號。於本發明中之斷線 。。十數 子開放檢測電路之柃、、則"：“可在比接收端 驅動電流之輸出，到逄4 I A 虎日守的 後。 51產生下-次驅動電流之輸出的期間更 曰/ ίΓ之功率電晶體Tr4 mosfet電晶體，但_ 日日月丑，虽然亦可為雙極電晶體(b】polar transis叫。^However, the period TG of the gate driving pulse of the 'driving power transistor 3 is TG < 8x T, and T is the period of the clock CLK. Here, the period κ is, for example, 'set to an 8-bit counter 4 (a period of 1 to 6 counts A. Comparator 4 = there is an output detection pulse of "L ,," in comparator 46 "%' output pulse of S Η (Reset pulse), reset the 8-digit ancient ten-counter 4d. Therefore, the 8-digit counter judges the number of leaves from 0. And because the next gate drive pulse is generated slightly before 8x T Two pounds are used to generate the output current of the power transistor 3. And as long as the current is generated, the 8-bit counter 4d continues to reset. As a result, the 8-bit counter 4 (3 of 8 count end signal. In general, when a disconnection occurs from the excitation coil on the power line 13 side] to the terminal 316662 14 200534564 out of terminal 2a, the voltage becomes ground_potential, and the circuit M's detection pulse, For example, even if the output generated by “M” generates an interrogation driving pulse, the power transistor 3 does not generate a radiating current, that is, the pulse of the male ’s m and the temple ’s 4 sigma cσσ 4c (severe pain ) Is maintained in the state of "L ,," so that the δ carry meter The output pulse is reset. As a result, an 8-bit counter 4 is generated when the output current of the power signal 13 is not generated. The 8-counter end signal is used as the disconnection detection signal. "The circuit for generating a stop signal for driving 'is composed of, or open (⑽ handsome) 2 舁 lock circuit () atch Clrcuit) 43. Then the la, lb, lc, ld, s, and ^ carry count 4d In the final stage, 8 counts, 5 counts, and 5 counts are used as disconnection detection signals, and are accepted via OR gate (c0r ^^) 42: the flash lock circuit 43. With this, the flash lock circuit 43 At the end, "H" was accepted as "r", and the logical sum of the excitation coils 11a to Ud of the drive stop signal generating circuit was latched in accordance with the clock clk. "When the disconnection detection signal (T) When being flash-locked, the flash-lock circuit 4 3 ^ "11 is applied to the phase-excitation signal generating circuit 9 as the drive stop signal SP. Thereby, the phase-excitation signal generating circuit 9 stops its operation. Again: '山 via terminal' When the RS input reset signal "1" is on the reset terminal R of the interlock circuit 43, The value of the lock circuit 43 is cleared by "0". In the initial state of the lock circuit 43, the signal is set to "0" according to the setting signal. 316662 15 200534564 In the Litianyou power line The excitation coil on the 13 side 丨 "Send 4 to the terminal 2a between the output terminals 2a" and "off", "table", and the 8-bit counter 4a generates a δ end signal ("蒋") as a disconnection detection signal, and The "I" generates the flash lock circuit 43 to stop the operation of the phase excitation signal generating circuit 9. Therefore, the stepping motor can be driven to IC1 (), and its life will be destroyed. Force 1Cl. In particular, the power transistor 3 will not be disconnected. The overflow signal of the δ carry counter ^ Uverflow) signal or carry (magic signal) is used. The current limit circuit 5 is made up of 5 channels. Comparison The second terminal of the device 5a and the reference voltage generating terminal are connected to the terminal 2f, so as to form a circuit 5b, which is located outside the IC and passes the terminal to the (−) input terminal of the comparator 5a, and the reference voltage v -Add to the (-) input terminal. When the output: sub-voltage (terminal 2f_) is taken as Vs, the pulsating current (output current) increases, and for the power transistor 3; Health 1 > = wheel exceeding the reference voltage VREF When the current is generated, in other words, the detection state S of the ^ ^ J 15 state 5a generates a detection pulse S. The detection pulse S is applied to the chopper pulse generation circuit 7 so that “『 PP 成 OFF (from “H” to “L The same% of the chopped moon's 砗 "drives the FF meter so that the power transistor 3 becomes the stop time (the period of" L ") of the chopping pulse P after its operating capacity, which is determined by ⑽ :: Set the timing circuit 8 to calculate, and after a certain period, 'mouth' Z ^ sec Jun, cut Pai Chong P becomes "L". The chopping 316662 16 200534564 wave pulse P is a pulse of "H" selected in the range of "Sec" and "Sec" within a period of 30. In other words, the chopping pulse P is a pulse whose pulse becomes "l" in accordance with the detection pulse s, and then becomes "", and is generated as a chopping pulse. 疋. =, The current limit circuit 5 is used as a resistor terminal When the power is 3%, the driving current is stopped, and the current of the power transistor 3 is limited. The machine ... the knife power is 5 to +10 a day "," Set the current limit circuit 5 as both / 、 Motor · transistor circuit overcurrent protection circuit. The skirt is in a fixed state, Η ，, you, Shi π β number generation circuit 9 "IJt — the kilogram pulse ρ is sent to the phase excitation signal ^ ^ 歹 1 〇, and AND (phase-excitation) and phase-excitation operation in the generator circuit 9 to obtain a single-phase driving emperor] 1 1 唬 and AND logic (AN private a gate driving pulse "H", 铒 (AND I0glc ), And output the gate as shown in Figure 2 (aWh ,, + Μ 力 卞 电 电 曰 格 3 的 极 pole (see question pole here ' The phase-excitation signal generating circuit 9] pole driving pulse of "ρ ·", thin gate, crystal 3% ^ AJ, chopped pulses that cut off the power at a predetermined frequency (Sheep transistor 3. Yu The chopping pulse P is “L” and the rate is “L” ^ ^ When the horse is L, the gate driving pulse becomes 11 ·· circle: the body 1 is 0FF, and the driving current for the green circle 11 a is stopped. Therefore, a flywheel diode D is provided in parallel with each excitation coil, and the current is passed between each excitation coil 11a, m and the new wave pulse "L". And the two currents are the average current determined by the relationship between the chopping pulse P and the OFF-period gate during the period of time. The work current is here. The timing circuit 8 is 17 1 Ϊ6662 200534564 corresponding to the single-phase driving circuits la, 〖b, Bu, etc., corresponding to each single-phase driving circuit] a ,; widely set and driven by the circle, respectively, to generate chops The wave pulse P goes to the excitation line circuit 9 of the two. The phase-excitation signal generation phase / demagnetization generation circuit 9 is based on the early phase of the coil in accordance with ^ dynamic, 1 phase-2 phase_, 2 phase_ # ° phase. Each of the drive circuit h, ^ ...: a circuit with a force rate and generates "Η" The gate drive pulses of the sun and the limb 3 are in order to limit the gate drive pulses of the 1000, *, and the "。" The period ΓΓ, the period of each gate pulse when the gate pulse is ^ = 2 by an individual chopping pulse P. The timing diagram of the operation of the power transistor protection circuit 4 is shown in FIG. During the gate driving pulse of the early-phase driving circuit 1a, the power transistor 3 is chopper-driven during the period "" and "in FIG. 2. The second ^) is its chopping pulse P. During the period "H" of the chopping pulse, since the driving current flows into the excitation coil m of the stepping motor u, ^ 乂 outputs a lot and the output voltage v of the sub 2a 〇m will form as shown in Figure 2 (c) 7] ^ 〇 Here, let ’s sigh according to the gate drive pulse of Figure 2 (a), so that the power of the single-phase drive circuit 1 a is two, knife + crystal 3 generates output current. In this case, when the comparator 46 is based on Zhaolun ψ ..., the voltage of the terminal 2a is calculated, and the divided voltage Va of the divided voltage exceeds the original value: + Same as & When Vb (Lingzhao Figure 2 (d)), since the output from “H ,, becomes“ τ ,, a ”, the force L sentence is shown in Figure 2 (e), according to Figure 2 ( c) The wheel heart _ produces the voltage Vout of the ancient son 2a, so that its output pulse 316662 200534564 m impulse becomes "Η", "l", "H ,," ". Due to the period ratio of the chopping pulse P The clock CLK ^ week white ^ detection pulse. The device 4c is smaller according to the #, week of the comparator 46, so it compares and punches, and produces a "Η" output (resetting the output of pulse Xu, L will be reset). As a result, the 8-bit counter 4d.4 is maintained by the interlock, and the surface circuit 43 is maintained at an initial value of `` 0 '', and the state where the phase excitation signal generating circuit 9 is continuously operated is generated, and the drive is generated. The “L” pulse of the comparator 46 generated at the stop signal at this time corresponds to the chopping pulse p of the two sheep corresponding to the gate driving pulse of the output detection pulse ^) in FIG. 2 (a). Generated. The next comparison pulse 46 is the detection pulse of the interval, corresponding to the initial chopping pulse P of j L. At this time, the generation period of the comparator rush is detected by the 8-bit timer 4 The pulse 8x T is shorter. Therefore, the period of 8 clocks of the mouth + ° r γ sheep $ 〇 入 + 山 ^ 要 笔 笔 线〗 There is no break / circle between the exciter on the 3 side to the output terminal 2a For the mountain, the 8-carrying f becomes the driving shutdown signal SP of the circuit 9. In addition, during the timing of the carry meter ¥ 4d, the detection pulse is once locked in the mountain μ, and the output just after the description can be used. Take a long time longer than the period of reading the detection pulse. On the other hand, when the power from the terminal of the exciting coil 11a on the side of the connection n to the stepping motor u is turned out, even if it includes the Japanese π network # s 4 When there is a disconnection between the sun and the gallbladder for driving 3 卞, it will not produce the wheel output. 2 The second half of figure (c) is dry, and L is gray, as described above. “The voltage at the output terminal is not generated. Vom. 316662] 9 200534564 Therefore: The piezoelectric ink Va becomes ν々〇ν. As a result, it becomes Va < Vb, and is pulsed by the comparator 4, and it is maintained at the state of "H" when the vehicle is detected. Therefore, there is no need to reset the 8-bit 守 Moriguchi. d, the number of clocks CLK. here, . At the time of comparison, crying 46 π 八八 座 生 八 —the person ’s turn-out current 46 does not produce “L ,,” 屮 屮 目,% ^% from the 8-carrying day-to-day knowing pulse, so, will, The 8-time signal generated by the 4d generation 4d ends the signal "Η", head, or gate 42 (〇Rgate), and the signal is used in the interlock circuit to perform the operation: ^ to interlock. As a result, the operation of the phase excitation signal generating circuit 9 is stopped: in step, the motor drive IC 10 is not damaged. At this time, the 8 from the 8-carry timer 4d is the end of the detection signal) It is best to have the following, 13a (disconnection check ...) During the generation of the human's turn-out current, a complex number is generated by 46 from 46. The "L," Luanhan Han's trueness over the period of the speculative pulse. Here, the count to the 8-bit count cries from μ. The length of the eight ... "During the end of the Park 8 count, each phase of the doubled knife The drive circuits la, lb, lc, and self-polarity drive pulses have a longer period of occurrence. This allows continuous detection of: the terminal open state exceeding the cycle of the gate drive pulse] cycle. 'Furthermore, OR gate (⑽gate) 42 Because of the 8 of the heart logic and the moving circuits la, lb, lc, Id, 4 is also the end signal of the 8 count obtained by the final stage of the carry counter 4d (the disconnection detection signal circuit-a The 8-bit counter 4d generates 8 3. The winter signal (disconnection signal) stops the operation of the excitation signal generating circuit 9. 隹 / In the previous embodiment, resetting from the 8-bit counter 4d to the 8-bit The period when the counter _ count ends is δχτ. In contrast, 316662 20 200534564 households • Let the period TG of the gate drive pulse be 6x T. Here, as long as the detection signal indicating the connection state of the open circuit of the cripple opener 4a is not generated, 'once, then this is used to generate a terminal open detection signal, And by the disconnection, the detection circuit 4d judges that it is disconnected. ♦. However, in the present invention, for example, a counter that counts an 8-bit counter 4d can be a 13-counter counter or a counter that counts 13 or more. At this time, if == not纟 And the detection signal of the connection status of the open detection circuit 4a is not connected ....-Generates a complex number _ person day ^ 'That is, when the terminal open detection signal is determined to generate a complex number-person continuously, only at this time is disconnected. The detection circuit determines the disconnection. This can make the disconnection determination more reliable .... In other words, with respect to the period TG of the gate driving pulse, the present invention resets the timer 4d to the end of the timing. , # Exceeds 2 times of this period 'can be used as disconnection determination. Furthermore, the' disconnection detection circuit 4b, even if the system does not detect ^ continuously, and the child opens the detection signal, and there are multiple times that the terminal is open_ You can judge It is a disconnection. In the implementation of M, although the comparator 5a is separately provided in the single-phase driving circuit b ^, Id, the comparator 5a can also be set by a plurality of single-phase driving = common ways. At this time, for example, The individual comparators 5a and hoods of the moving circuits U, 4 and the individual comparators 5a of the early-phase drive circuits 1c and 1d can output the output current to the total of two resistances Rs. In addition, in the embodiment, it is relatively crying s °. 5 knows that π has two (+) inputs and one child is made. This is also possible to compare the internal circuit of Yi 5 to parallel 316662 2] 200534564 :: Program a comparator. It is also possible to use a comparator with (+) input terminals. Fortunately, there are two comparators with two input terminals. ). . Furthermore, in the embodiment ', the disconnection detection signal is used as the end-of-count signal. However, according to the present invention, it is not necessary that the number of signals is 50 or more. Disconnection in the present invention. . Decade open detection circuit, "...": "It can be more than the output of the driving current at the receiving end to 逄 4 IA Tiger's guard. 51 The period during which the next-time driving current is generated / Power transistor Tr4 mosfet transistor, but _ riyue ugly, although it can also be a bipolar transistor (b) polar transis called. ^
再者，在實施例，雖就單極驅動之 之馬達駆A 運馬達驅動IC 動-电路作了說明，但當然也可將 出笔路作為推挽式動作之驅 P之知 驅動（正相位與逆相位之全波用本發明於雙载 [產業上的可利用性] 動)之步進馬達驅動1C。 、上之5兒明，在實施例，係透過斬波脈衡甚a + 與0FF計時電心皮脈衝產生電路7 要是功逛J 订功率電晶體3的0FF控制，但只 '、电晶體為可被OFF的構成，％ $ & & 脈衝產生電路7與OFF計時電路^對2發明，斬波 成。 包峪8並不一疋為必要的構 驅動1C作了說明 晶體OFF而得以 ’則即便係任何 ，但 限制 一種 # h再者，在實施例，雖就步進馬達 ^ ^有以現定的電流值將功率雷 馬區*、、亡 ^ % 丨L之電流限制電路之驅動電路 電路本發明皆可適用。 316662 22 200534564 【圖式簡單說明】 請為適用本發明知之馬達驅 保縵電路之一實施例的單極驅电路之功率電晶體 圖。 v進馬達驅動器的方塊 第2圖為功率電晶體保護 圖U)為單相驅動電路la 勤作的時序圖。第2 Μ波脈衝P;第2圖（〇為輸:端^脈衝：第2圖⑴ 第2圖（d )為分壓電壓Va ;々 a之輻出電壓Vout; 輪出脈衝。 乐圖（e)為比較器46之 【主要元件符號說明】 1 2 2a 2e 3 4 4a 4b 4d8 5a 7 8 10 lb - lc > Id -, 早相驅動電路 調節電路（REG) 2b 2C、2d 輪出端子 2f ' 2g ' 2l 端子 N通道M〇SFET功率電晶體 46比較器 電流限制電路 基準電壓產生電路 相激磁信號生成電路 功率電晶體保護電路 端子開放檢測電路 斷線檢測電路 4e 進位計數器 5 比較器 6 斬波脈衝產生電路 OFF計時電路9 步進馬達驅動JC 步進馬達 316662 1] 200534564 11a、 11 b、11 c、11 d 激磁線圈 12 電源 12a 電源線（圖面沒有標不） 13 電源線 14 時脈產生電路 41 驅動停止信號發生電路 42 或間 43 閂鎖電路 44、 45電阻分壓電路 RE 重設端子 R1、 R2、Rs電阻 D 飛輪二極體 S 脈衝 SP 驅動停止信號 P 斬波脈衝 GND 地線 CLK 時脈 24 316662Furthermore, in the embodiment, although the motor-A driving motor driving IC of a unipolar driving IC is described, it is of course possible to use the pen-out circuit as a driving mechanism for a push-pull operation (positive phase) The full wave and reverse phase are driven by the stepper motor of the present invention on a dual-load [industrial availability] 1C. The above 5 is clear, in the embodiment, it is through the chopped pulse to balance a + and 0FF timing electric heart skin pulse generation circuit 7 if the power is J, order 0FF control of power transistor 3, but only the transistor is The structure that can be turned off is% $ & & The pulse generating circuit 7 and the OFF timing circuit ^ pair 2 invention, chopped into. The package 8 does not explain the necessary structure for driving the 1C, and the crystal is turned off, so that even if it is any, it is limited to one type. In addition, in the embodiment, the stepper motor has a current of ^^ The present invention is applicable to driving circuit circuits of a current limiting circuit that is based on the power of the Reima region *, and the% ^ L. 316662 22 200534564 [Brief description of the drawings] Please show a power transistor of a unipolar driver circuit which is an embodiment of a motor driver protection circuit known in the present invention. v Enter the block of the motor driver. Figure 2 is the power transistor protection. Figure U) is the timing diagram of the single-phase drive circuit. The second MW wave pulse P; Figure 2 (0 is the input: terminal pulse: Figure 2 ⑴ Figure 2 (d) is the divided voltage Va; 々a's spoke voltage Vout; pulse out. e) The description of the main component symbols of the comparator 46 1 2 2a 2e 3 4 4a 4b 4d8 5a 7 8 10 lb-lc > Id-, early-phase drive circuit adjustment circuit (REG) 2b 2C, 2d wheel-out terminal 2f '2g' 2l terminal N channel MOSFET power transistor 46 comparator current limit circuit reference voltage generation circuit phase excitation signal generation circuit power transistor protection circuit terminal open detection circuit disconnection detection circuit 4e carry counter 5 comparator 6 cut Wave pulse generating circuit OFF timing circuit 9 Stepping motor driving JC stepping motor 316662 1] 200534564 11a, 11 b, 11 c, 11 d Exciting coil 12 Power supply 12a Power line (not shown on the picture) 13 Power line 14 Clock Generating circuit 41 Drive stop signal generating circuit 42 or 43 Latching circuit 44, 45 Resistor voltage dividing circuit RE Reset terminal R1, R2, Rs Resistor D Flywheel diode S pulse SP Drive stop signal P Chopper pulse GND Ground Line CLK clock 24 316662