201012061 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種驅動電路，且特別是一種高廢側 驅動電路。 【先前技術】 隨著科技的日新月異，電子產業蓬勃發展，功率轉換 器已經廣泛地運用在人們的日常生活中，像是電源供應 器、馬達驅動器等等。現今而言，許多功率轉換器採用高 壓側驅動器來控制耦接到負載的電壓源。 請參照第1圖，係繪示一種習知的高壓側驅動器的等 效電路圖。第1圖中，高壓側電晶艎10耦接低壓側電晶體 20。當高壓側電晶體1〇截止，且低壓側電晶體2〇導通時， 電容30可進行充電。另一方面，控制電晶體45截止，使 得浮動電壓Vcc由電晶體41傳送至高壓側電晶體1〇。然 而’此高壓側驅動器在高壓與高頻應用中穩定性較低。 因此，基於上述原因’需要一種新的高壓側驅動電路， 適用於尚壓應用而且有效提高穩定度。 【發明内容】 本發明的目的就是提供一種新的高壓側驅動電路。 依照本發明一實施例，一種高壓側驅動電路，包含橋 式整流器、靴帶電容器、信號產生器以及鎖存電路。橋式 整流器’包含第一二極體、第二二極體、第三二極體以及 第四二極體。第一二極體具有第一陽極與第一陰極，第二 201012061 二極體具有第二陽極與第二陰極，其中第二陰極耦接第一 陽極且第—陽極_接高壓側電晶體的源極及低壓側電晶 體的；及極。第二二極體具有__第三陽極與一第三陰極， 其中第__陰極g接第__陰極；第四二極體具有第四陽極與 第四陰極’其中第四陰極麵接第三陽極，且第四陽極麵接 第二陽極。靴帶電容器具有正端與負$，其中正端耦接第 三陰極及第一陰極’且負端耦接第四陽極、第二陽極及高 壓侧電晶艘的源極。信號產生器包含第—脈衝輸出端以及 第一腺衝輸出端。第一脈衝輸出端可週期性地產生一第一 脈衝訊號。第二脈衝輸出端可週期性地產生一第二脈衝訊 號，其中當第二脈衝輸出端產生第二脈衝訊號時，第一脈 衝輸出端停止產生第一脈衝訊號；當第一脈衝輸出端產生 第一脈衝訊號時，第二脈衝輸出端停止產生第二脈衝訊 號。鎖存電路包含設定端、重設端以及輸出端。設定端可 接收第一脈衝訊號。重設端可接收第二脈衝訊號。輸出端 可根據第一脈衝訊號或第二脈衝訊號，輸出一數位訊號至 高壓側電晶體的一閘極，其中輸出端根據第一脈衝訊號， 將數位訊號設定在一第一電壓位準；輸出端根據第二脈衝 訊號，將數位訊號設定在一第二電壓位準，其中第一電壓 位準大於第二電壓位準。 藉此，高壓側驅動電路可驅動高壓側電晶艘與低麼側 電晶體。 本發明之技術態樣與現有技術相比具有明顯的優點禾ι 有益效果。借由上述技術方案，本發明之技術態樣可達到 相當的技術進步性及實用性’並具有産業上的廣泛利用價 201012061 值’其至少具有下列優點： (1) 可對靴帶電容器進行充電，而無需額外的偏壓。 (2) 防止雜訊干擾。 綜上所述，本發明新穎的高壓側驅動器，具有防止雜 訊干擾的特點’並且可將此高壓側驅動器運用在電力電路 或其他相似的技術環節。本發明具有上述諸多優點及實用 價值’其不論在電路結構或功能上皆有較大的改進，在技 術上有顯著的進步，並産生了好用及實用的效果，且较現 有的抗雜訊元件具有增進的突出多項功效，從而更加適於 實用’並具有産業的廣泛利用價值，誠爲一新穎、進步' 實用的新技術。 以下將以實施例對上述之說明以及接下來的實施方式 做詳細的描述，並對本發明提供更進一步的解釋。 【實施方式】 為了使本發明之敘述更加詳盡與完備，可參照下列之 圖式及各種實施例，囷式中相同之號碼代表相同之元件。 另一方面，眾所週知的電路元件並未描述於實施例中，以 避免造成本發明不必要的限制。 請參照第2圖，其係繪示依照本發明一實施例的一種 高壓侧驅動電路（High side driver)的等效電路圖。第2 圖中，高壓側驅動電路200可包含橋式整流器210、靴帶電 容器220、信號產生器230以及鎖存電路（latch circuit) 240。橋式整流器21〇可包含第一二極體212、第二二極體 214'第三二極體216以及第四二極艎218。其中，第一二 201012061 極體212具有第一陽極與第一陰極，第二二極體214具有 第二陽極與第二陰極’其中第二二極體214的第二陰極輕 接第一二極體212的第一陽極，且第二二極艘214的第二 陽極耦接咼壓侧電晶體（high side transistor ) 270的源極以 及低壓側電晶體（low side transistor ) 280的没極。第三二 極想216具有第二陽極與第三陰極，其中第三二極體216 的第三陰極麵接第一二極體212的第一陰極。第四二極體 218具有一第四陽極與一第四陰極，其中第四二極體218 ® 的第四陰極耦接第三二極體216的第三陽極，且第四二極 體218的第四陽極耦接第二二極體214的第二陽極。再者， 靴帶電容器220的兩端可分為一正端與一負端，其中靴帶 電容器220的正端耦接第三二極體216的第三陰極以及第 一二極體212的第一陰極，且靴帶電容器22〇 第:二極…第四陽極、第二二極想214的第二= 及同壓側電晶體270的源極。信號產生器23〇具有第一脈 衝輸出端231與第二脈衝輸出端232,其中第一脈衝輸出端 231耦接第二二極體214的第二陰極及第一二極體212 —陽極’且第二脈衝輸出端232㈣第四二極體218的第 四陰極以及第二二極趙216的第三陽極。鎖存電路24〇具 有設定端s、重設端R與輸出端Q，其甲設定端s麵接第 —脈衝輸出端231，重設端R輕接第二脈衝輸出端232,輸 :端Q耦接高壓側電晶體27〇的閘極。於一實施例，輸出 端Q可經由一耐壓電容或一耐壓電晶體耦接至高壓側電晶 體270的閉極。 值得注意的是，於信號產生器230,第-脈衝輸出端 201012061 231可週期性地產生第一脈衝訊號。第二脈衝輸出端232 可週期性地產生第二脈衝訊號。當第二脈衝輸出端產生第 二脈衝訊號時，第一脈衝輸出端停止產生第一脈衝訊號； 當第一脈衝輸出端產生第一脈衝訊號時，第二脈衝輸出端 停止產生第二脈衝訊號。 在電路配置上，第一脈衝輸出端231可具有一電晶體 與（或）電容，第二脈衝輸出端232亦可具有一電晶體與 (或）電容。201012061 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a driving circuit, and more particularly to a high waste side driving circuit. [Prior Art] With the rapid development of technology, the electronics industry is booming, and power converters have been widely used in people's daily lives, such as power supplies, motor drives, and so on. Today, many power converters use a high voltage side driver to control the voltage source coupled to the load. Referring to Figure 1, an equivalent circuit diagram of a conventional high side driver is shown. In Fig. 1, the high side transistor 10 is coupled to the low side transistor 20. When the high-voltage side transistor 1 〇 is turned off and the low-voltage side transistor 2 〇 is turned on, the capacitor 30 can be charged. On the other hand, the control transistor 45 is turned off, so that the floating voltage Vcc is transferred from the transistor 41 to the high-voltage side transistor 1〇. However, this high side driver is less stable in high voltage and high frequency applications. Therefore, for the above reasons, a new high-voltage side drive circuit is required, which is suitable for still pressure applications and effectively improves stability. SUMMARY OF THE INVENTION It is an object of the present invention to provide a new high side drive circuit. In accordance with an embodiment of the invention, a high side drive circuit includes a bridge rectifier, a bootstrap capacitor, a signal generator, and a latch circuit. The bridge rectifier 'includes a first diode, a second diode, a third diode, and a fourth diode. The first diode has a first anode and a first cathode, and the second 201012061 diode has a second anode and a second cathode, wherein the second cathode is coupled to the first anode and the first anode is connected to the source of the high voltage side transistor Extreme and low voltage side transistors; and poles. The second diode has a third anode and a third cathode, wherein the first cathode is connected to the cathode, and the fourth diode has a fourth anode and a fourth cathode. The third anode is connected to the second anode. The bootband capacitor has a positive terminal and a negative $, wherein the positive terminal is coupled to the third cathode and the first cathode' and the negative terminal is coupled to the sources of the fourth anode, the second anode, and the high voltage side electrocautery. The signal generator includes a first pulse output and a first gland output. The first pulse output can periodically generate a first pulse signal. The second pulse output end periodically generates a second pulse signal, wherein when the second pulse output end generates the second pulse signal, the first pulse output end stops generating the first pulse signal; when the first pulse output end generates the first When a pulse signal is received, the second pulse output stops generating the second pulse signal. The latch circuit includes a set terminal, a reset terminal, and an output terminal. The set terminal can receive the first pulse signal. The reset terminal can receive the second pulse signal. The output terminal can output a digital signal to a gate of the high-voltage side transistor according to the first pulse signal or the second pulse signal, wherein the output terminal sets the digital signal to a first voltage level according to the first pulse signal; The terminal sets the digital signal to a second voltage level according to the second pulse signal, wherein the first voltage level is greater than the second voltage level. Thereby, the high-voltage side driving circuit can drive the high-voltage side electric crystal boat and the low-side side crystal. The technical aspect of the present invention has significant advantages and advantages over the prior art. With the above technical solution, the technical aspect of the present invention can achieve considerable technological advancement and practicability 'and has an industrial wide use price of 201012061 value' which has at least the following advantages: (1) can charge the shoe with a capacitor Without additional bias. (2) Prevent noise interference. In summary, the novel high side driver of the present invention has the feature of preventing noise interference' and the high side driver can be used in a power circuit or other similar technical aspects. The invention has the above-mentioned many advantages and practical values, which have great improvements in circuit structure or function, and have significant advances in technology, and have produced useful and practical effects, and are more resistant to noise than existing ones. The components have enhanced multi-functions, which make them more suitable for practical use and have the extensive use value of the industry. It is a novel, progressive and practical new technology. The above description and the following embodiments will be described in detail below with reference to the embodiments, and further explanation of the invention. [Embodiment] In order to make the description of the present invention more complete and complete, reference is made to the drawings and the various embodiments. On the other hand, well-known circuit elements are not described in the embodiments to avoid unnecessarily limiting the invention. Please refer to FIG. 2, which is an equivalent circuit diagram of a high side driver according to an embodiment of the invention. In Fig. 2, the high side drive circuit 200 may include a bridge rectifier 210, a boot capacitor 220, a signal generator 230, and a latch circuit 240. The bridge rectifier 21A can include a first diode 212, a second diode 214', a third diode 216, and a fourth diode 218. Wherein, the first two 201012061 polar body 212 has a first anode and a first cathode, and the second diode 214 has a second anode and a second cathode, wherein the second cathode of the second diode 214 is lightly connected to the first diode The first anode of the body 212 and the second anode of the second pole 214 are coupled to the source of the high side transistor 270 and the low pole of the low side transistor 280. The third diode 216 has a second anode and a third cathode, wherein the third cathode of the third diode 216 is connected to the first cathode of the first diode 212. The fourth diode 218 has a fourth anode and a fourth cathode, wherein the fourth cathode of the fourth diode 218 is coupled to the third anode of the third diode 216, and the fourth diode 218 The fourth anode is coupled to the second anode of the second diode 214. Furthermore, the two ends of the bootband capacitor 220 can be divided into a positive end and a negative end, wherein the positive end of the bootband capacitor 220 is coupled to the third cathode of the third diode 216 and the first diode 212 A cathode, and a shoe with a capacitor 22 〇 first: two poles ... fourth anode, second diode 214 second = and the source of the same side transistor 270. The signal generator 23A has a first pulse output terminal 231 and a second pulse output terminal 232, wherein the first pulse output terminal 231 is coupled to the second cathode of the second diode 214 and the first diode 212-anode The second pulse output terminal 232 (four) has a fourth cathode of the fourth diode 218 and a third anode of the second diode 216. The latch circuit 24A has a set terminal s, a reset terminal R and an output terminal Q, wherein the set terminal s is connected to the first pulse output terminal 231, the reset terminal R is connected to the second pulse output terminal 232, and the output terminal Q is The gate of the high side transistor 27 is coupled. In one embodiment, the output terminal Q can be coupled to the closed end of the high voltage side transistor 270 via a withstand voltage capacitor or a piezoresistive crystal. It should be noted that at the signal generator 230, the first pulse output terminal 201012061 231 can periodically generate the first pulse signal. The second pulse output 232 can periodically generate a second pulse signal. When the second pulse output generates the second pulse signal, the first pulse output stops generating the first pulse signal; when the first pulse output generates the first pulse signal, the second pulse output stops generating the second pulse signal. In the circuit configuration, the first pulse output terminal 231 can have a transistor and/or a capacitor, and the second pulse output terminal 232 can also have a transistor and/or a capacitor.
於鎖存電路240’設定端S可接收第一脈衝訊號。重設 端R可接收第二脈衝訊號。輸出端Q可根據第—脈衝訊號 或第二脈衝訊號，輸出一數位訊號至高壓側電晶體的閘 極’其中輸出端Q可根據第―脈衝訊號，將數位訊號設定 在第-電壓位準；另外，輸出端(^可根據第二脈衝訊號， 將數位訊號設定在第二電壓位準，其中第—電壓位準大於 第二電壓位準。 本實施例的高壓側驅動電路2〇〇中若第一 〜^ 胍衝榭出 端加5輸出第一脈衝信號，且第二脈衝輸出端232未輸出 第二脈衝信號時，則輸出端Q輸出第―電懸準數位訊號 (尚電位），使高壓側電晶趙27〇導通；反之，若第二脈衝 輸出第二脈衝信號’且第一脈衝輸出端231未 輸出第一脈衝信號時，則輸出端Q輸出第二電壓位準之數 位訊號（低電位），使高壓側電晶截270截止。 值得注意的是，無論高廢㈣“㈣ 侧電晶趙280係截止或“，笛/ “幻㈣ 脈衝信號與（或）第二 均可對鞋帶電容器220進行充電，而無需額外的 201012061 睛繼續參照第2圖’高壓側驅動電路2〇〇可選擇性地 包含電壓源260以及第五二極體250。第五二極體25〇具有 第五陽極與第五陰極，其中第五二極體25〇的第五陽極耦 接電壓源260’且第五二極體250的第五陰極耦接第三二極 體216的第三陰極以及第一二極體212的第一陰極。 值得注意的是，本實施例的高壓侧驅動電路中，若高 壓側電晶體270截止且低壓側電晶體28〇導通時，電壓源 260可對靴帶電容器22〇進行充電。 為了使本發明之敘述更加詳盡與完備，請參照第3圖， 係繪不依照本發明一實施例的一種高壓侧驅動電路的 時序圖。帛3圖中’當第-脈衝輸出端231每間隔一時間 差ΛΤ輸出第一脈衝信號ρι時，則第二脈衝輸出端不 輸出第二脈衝信號P2 ’藉此輸出端Q輸出高電位Vh之數 位=號。另外’第-脈衝輸出端231間歇性地輸出第一脈The set terminal S of the latch circuit 240' can receive the first pulse signal. The reset terminal R can receive the second pulse signal. The output terminal Q can output a digital signal to the gate of the high-voltage side transistor according to the first pulse signal or the second pulse signal, wherein the output terminal Q can set the digital signal to the first voltage level according to the first pulse signal; In addition, the output terminal (^ can set the digital signal to the second voltage level according to the second pulse signal, wherein the first voltage level is greater than the second voltage level. The high voltage side driving circuit 2 of the embodiment is When the first pulse signal is outputted by the first output terminal 5 and the second pulse signal is not outputted by the second pulse output terminal 232, the output terminal Q outputs the first-electro-suspension digital signal (still potential), so that The high-voltage side is turned on; if the second pulse outputs the second pulse signal' and the first pulse output terminal 231 does not output the first pulse signal, the output terminal Q outputs a digital signal of the second voltage level ( Low potential), so that the high-voltage side of the crystal cut 270 cutoff. It is worth noting that regardless of high waste (four) "(four) side electro-crystal Zhao 280 system cut-off or ", flute / "magic (four) pulse signal and / or second can be The shoelace capacitor 220 is charged Without additional 201012061, the lens continues to refer to FIG. 2 'the high side driver circuit 2 〇〇 optionally includes a voltage source 260 and a fifth diode 250. The fifth diode 25 has a fifth anode and a fifth a cathode, wherein a fifth anode of the fifth diode 25A is coupled to the voltage source 260' and a fifth cathode of the fifth diode 250 is coupled to the third cathode of the third diode 216 and the first diode 212 It is noted that in the high-voltage side driving circuit of the present embodiment, if the high-voltage side transistor 270 is turned off and the low-voltage side transistor 28 is turned on, the voltage source 260 can charge the shoe-capacitor 22?. In order to make the description of the present invention more detailed and complete, please refer to FIG. 3, which is a timing diagram of a high-voltage side driving circuit not according to an embodiment of the present invention. In the figure 3, when the first-pulse output terminal 231 is spaced apart When the first pulse signal ρι is output for a time difference, the second pulse output terminal does not output the second pulse signal P2 ', whereby the output terminal Q outputs the digit of the high potential Vh = the number. In addition, the 'th-pulse output terminal 231 intermittently Output first pulse
衝乜號P1 ’可使輸出端Q穩定地輸出此邏輯高電位V 數位訊號。 H 值得注意的是，本實施例 第一脈衝輸出端231 號P1，其中每一第一 另-方面’當第二脈衝輪出端232每間隔_時間差AT 輪出第二脈衝信號!>2時，則第一脈衝輸出端231不 脈衝#號P1，藉此輸出端Q輪出低電位Vl之數位 另外，第二脈衝輸出端232間歇性地輸出第二脈衝信號 p2 ’可使輸出端q穩定地輸出低電位之數位訊號。， 本實施例的高愚相，丨ιε叔命.The punctual number P1 ' can cause the output terminal Q to stably output the logic high potential V digital signal. H It is worth noting that the first pulse output terminal 231 is P1 of the present embodiment, wherein each of the first other aspects 'when the second pulse wheel output terminal 232 rotates the second pulse signal every interval_time difference AT!>2 When the first pulse output terminal 231 does not pulse the #1 P1, the output terminal Q rotates the digit of the low potential V1. In addition, the second pulse output terminal 232 intermittently outputs the second pulse signal p2' to make the output terminal q. A low-level digital signal is stably output. , the high stupid phase of this embodiment, 丨ιε uncle.
Q之數位 201012061 訊號設定在第一電磨位準（高位準）。或是，第二脈衝輸出 端232每間隔_時間差Δτ輸出第二脈衝信號p2，其中每 一第二脈衝信號P2均可使輸出端代數位訊號設定在第二 電麼位準（低位m此，輸出端Q穩定地輸出正確的電 位值，有效地防止雜訊對鎖存電路造成干擾。 雖然本發明已以實施例揭露如上，然其並非用以限定 本發明，任何熟習此技藝者，在不脫離本發明之精神和範 圍内，當可作各種之更動與潤飾，因此本發明之保護範圍 當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 為讓本發明之上述和其他目的、特徵、優點與實施例 能更明顯易僅，所附圖式之詳細說明如下： 第1圖係繪示一種習知的高壓側驅動電路的等效電路 圖。 第2圖係繪示依照本發明實施例的一種高壓側驅動器 的等效電路圖。 第3圖係繪示依照本發明實施例的一種高壓側驅動電 路的時序圖。 【主要元件符號說明】 1G:高壓側電晶體 20 :低壓側電晶體 3〇 :電容 41 :電晶體 45 :控制電晶體 200 :高壓側驅動電路 11 201012061 210 :橋式整流器 212 :第一二極體 214 :第二二極體 216 :第三二極體 218 :第四二極體 220 :靴帶電容器 230 :信號產生器 231 :第一脈衝輸出端 232 :第二脈衝輸出端 240 :鎖存電路 250 :第五二極體 260 :電壓源 270 :高壓側電晶體 280 :低壓側電晶體 PI ： 第一脈衝信號 P2 ： 第二脈衝信號 Q : 輸出端 R : 重設端 s ： 設定端 △ T :時間差 VH :南電位 VL : 低電位 12Q digits 201012061 The signal is set at the first electric grind level (high level). Alternatively, the second pulse output terminal 232 outputs the second pulse signal p2 every interval_time difference Δτ, wherein each second pulse signal P2 can set the output end algebraic signal to the second level (lower m, The output terminal Q stably outputs the correct potential value, effectively preventing the noise from interfering with the latch circuit. Although the invention has been disclosed in the above embodiments, it is not intended to limit the invention, and anyone skilled in the art is not The scope of protection of the present invention is defined by the scope of the appended claims, which are intended to be in accordance with the scope of the invention. And other objects, features, advantages and embodiments will be more obvious and obvious. The detailed description of the drawings is as follows: FIG. 1 is an equivalent circuit diagram of a conventional high-voltage side driving circuit. An equivalent circuit diagram of a high side driver according to an embodiment of the invention. Fig. 3 is a timing diagram of a high side driver circuit in accordance with an embodiment of the present invention. Description] 1G: High-voltage side transistor 20: Low-voltage side transistor 3〇: Capacitor 41: Transistor 45: Control transistor 200: High-voltage side driver circuit 11 201012061 210: Bridge rectifier 212: First diode 214: Diode 216: third diode 218: fourth diode 220: shoe with capacitor 230: signal generator 231: first pulse output 232: second pulse output 240: latch circuit 250: Five-pole body 260: voltage source 270: high-voltage side transistor 280: low-voltage side transistor PI: first pulse signal P2: second pulse signal Q: output terminal R: reset terminal s: set terminal ΔT: time difference VH : South potential VL : Low potential 12