M422238 五、新型說明： 【·新型所屬之技術領域】 本新型涉及電路領域，更具體地涉及返馳結構的開關電源電路。 【先前技術】 當今時代，人類社會面臨能源消耗過大、環境破壞嚴重的壓力，節能 1在眉睫。ί态设備及電子產品為降低能源消耗’必須對其電源轉換 盗仃優化，以實現更高的轉換效率和更低的靜態待機功耗。在中小功率 ^处返馳、结構因為成本低廉、.設計簡單被普遍採用。目前市面上使用的 電源電路的轉換鱗、待機雜等技術 鮮、安全規範的一 ^ 【新型内容】 本新型提出了-種新型的返馳結構的開關電源電路。 流和==例:====_電_ 樣電路的輸人端相連接出端相連接，輸出端與回饋取 相連接，輸出端與控制電路的輸端車:入端與輸出遽波電路的輸出端 源輸入整流和電磁干擾渡波接供=電路的輸入端與交流電 輸入端相連接；供電電路的輸^ =關關電路的輸人端和保護電路的 /、返馳開關電路的輸出端相連接，輸出 3 M422238 =控制電路的輸人端和保護電路的輸人端相連接， ·以及 出端和供電電路的輸出端相連接，輸出端接地。月1 ^=====_咖娜峨、待機 【實施方式】 述捕财财面哺徵和种财_。下面的描述 技術人員來說_易見的是，本新型可以在 細節的情況下實施。下面對實施例的描述僅僅i=中的一些 提供!T嫩清楚的理解。本新型絕不限於二:出的 :=離本新型的精神的前提下覆蓋了相關元素或部件的;何 圖1示出了根據本新型的實施例的返馳機構的開關電源電路的電路 ，電本新型的實施例的返驰機構的開關電源電路包括交 二電源（AC)輸入k和電磁干擾（圓）遽波電路1、返驰 輪出滤《路3、回饋取樣電路4、控制電路5、供電電路6、過沖 路7、驅動電路8、和保護電路9。 電 在圖1所示的實施例中，交流電源輸入整流和電磁 + 括保險絲㈤SE)、祕娣舰雜、χ餘、變_ 輸出濾波電容。 及正仙·電橋 在圖1所示的實施例中，返馳開關電路2包括返馳變壓$ Τ (MOSFET)、以及原電流取樣電阻。在圖i所示的實施例中二二二 路3包括輸出整流二極體和濾波電容兩個主要部分。整、]、'思/電 吸收電路’ RC吸收電路根據需要可以調整或者不用。針=有RC 要求’輸錢波電路3可明加;^纽或者共_波^:輸出紋波 在圖1所示的實施例中，回饋取樣電路4由並聯麵積體電路 (TL43i)、光搞、以及回饋電阻和回饋電容構成’用於對返馳 電源電路的輸出電壓進行採樣，通過TL431對採樣電壓進行調節並將二j 4 M422238 1 控所= 實^中’控制電路5的主要器件是-顆脈寬調制 工弓曰片及必要的週邊辅助元件，比如OB5269 制晶片。該控制晶片⑽總共包含8只功能接腳，分別是域似功月爾 M =^(GATE)，用於控制返馳開關電路2中開關管的導通储關 閉，與驅動電路8的輸入端相連接； ^通久者關 輸出回饋接腳（FB)，用於檢測返馳結構的開關 ^饋取樣編巾的細峨（即，⑽取輪4 系統保護接腳（RT)，用於控制晶片的系統超溫保護和/或 濩，經由超溫保護電路和/或超壓保護電路接地； — ’、 連接供電輸人接腳（VDD) ’ 電，與供_的輪出端相 電流採樣接腳（CS )，用於對返驰開關電路2中變壓器 樣，與返馳開關電路2的輸出端相連接； 、机進订才木 多功能接腳（HV)’用於該控制晶片的高壓啟動、χ電容放 電壓债測、以及實現脚“的輸人電壓超壓/欠壓賴，& 1入 整流和電磁干擾濾波電路1的輸出端相連接； 书"、月入 晶片接地接腳（GND)，用於接地； 空餘接腳（NC)，主要用於該控制晶月的多功能接腳和供電輪 之間的隔離，此接腳可以通過晶片封裝區分封出或者不封出 ^ ^腳 該接腳。 P有或沒有 如圖1所示，過沖吸收電路7連接在返馳開關電路2中a、b里 間。驅動電路8連接在控制電路5和返馳開關電路2之間。供電古之 接在控制電路5和返驰開關電路2之間。更具體地，驅動電路=連=連 制電路5中控制晶片的驅動接腳和返馳開關電路2中的開關管之門 控 連接在圖1中c點和ϋ點之間>供電電路6連接在控制電路^中曰I於 入接腳和返馳開關電路2中的回饋繞組之間（即，連接在 電輸 點之間）。 _ TG點和Η 5 M422238 圖2不出了 A、B兩點之間的吸收電路的多種接法，用以連接瞬態抑 制二極體TVS '二極體Di、電阻R，及R"、以及電容器Cp等組件。圖3示 出了 C、D兩點之間的驅動電路的多種接法，用以連接二極體Di、以及電 阻R|及R"等組件。圖4示出了 G、η兩點之間的供電電路的多種接法，用 以連接二極體Di、電阻R·、以及電容器Cp&Cr等組件。 超溫保護電路9連接至控制晶片的系統保護接腳RT，具有外部超溫 (〇TP)保護設定功能和外部超壓保護功能。此功能接腳可以外部懸空不 接!也I以只有⑽或超壓保護功能中的—種功能，也可關時具有幾個 保護功能。圖5示出了系統保護接腳RT僅用於〇τρ保護功能的情況下所M422238 V. New description: [·New technology field] The present invention relates to the field of circuits, and more particularly to a switching power supply circuit of a flyback structure. [Prior Art] In the current era, human society is facing the pressure of excessive energy consumption and serious environmental damage. Energy conservation is imminent. In order to reduce energy consumption, devices and electronics must be optimized for power conversion and robbery to achieve higher conversion efficiency and lower static standby power consumption. In the small and medium power ^ return, the structure is generally adopted because of its low cost and simple design. At present, the conversion scale and standby technology of the power circuit used in the market are fresh and safe. ^ [New content] This new type proposes a new type of switching power supply circuit for the flyback structure. Flow and == Example: ====_Electric_ The input end of the sample circuit is connected to the output end, the output end is connected with the feedback, and the output end is connected to the control circuit: the input end and the output chopping The output of the circuit is input and rectified and the electromagnetic interference is connected to the input terminal of the circuit and the AC input terminal; the input of the power supply circuit is the input end of the circuit and the output of the protection circuit/return switch circuit Terminal phase connection, output 3 M422238 = The input end of the control circuit is connected to the input end of the protection circuit, and the output terminal is connected to the output end of the power supply circuit, and the output terminal is grounded. Month 1 ^=====_加娜峨, Standby [Embodiment] Telling about the financial aspects of feeding and farming _. The following description is apparent to the skilled person, the present invention can be implemented in the details. The following description of the embodiments is only provided by some of i=! The present invention is by no means limited to two: the following: = the relevant elements or components are covered under the premise of the novel; FIG. 1 shows the circuit of the switching power supply circuit of the flyback mechanism according to the embodiment of the present invention, The switching power supply circuit of the flyback mechanism of the novel embodiment includes a second power supply (AC) input k and an electromagnetic interference (circle) chopper circuit 1, a flyback wheel output filter, a path 3, a feedback sampling circuit 4, and a control circuit. 5. A power supply circuit 6, an overshoot 7, a drive circuit 8, and a protection circuit 9. In the embodiment shown in Fig. 1, the AC power input rectification and electromagnetic + fuse (5) SE), the secret ship, the residual, the variable _ output filter capacitor. And the sinusoidal bridge In the embodiment shown in Fig. 1, the flyback switch circuit 2 includes a flyback voltage change Τ (MOSFET) and a primary current sampling resistor. In the embodiment shown in FIG. i, the two-two circuit 3 includes two main parts of the output rectifying diode and the filter capacitor. Integrity,], 'Think/Electric Absorption Circuit' The RC absorption circuit can be adjusted or not needed as needed. Needle = RC required 'Transfer money circuit 3 can be clearly added; ^ New or common _ wave ^: Output ripple In the embodiment shown in Figure 1, the feedback sampling circuit 4 is composed of parallel area body circuit (TL43i), Light ray, and feedback resistor and feedback capacitor constitute 'used to sample the output voltage of the flyback power circuit, adjust the sampling voltage through TL431 and control the two J 4 M422238 1 control = real ^ 'control circuit 5 The device is a pulse width modulation bow and the necessary peripheral components, such as the OB5269 wafer. The control chip (10) comprises a total of eight function pins, which are respectively domain-like powers M=^(GATE), for controlling the conduction and closing of the switch tubes in the flyback switch circuit 2, and the input end of the drive circuit 8 Connection; ^Long-term off output feedback pin (FB), used to detect the switchback of the flyback structure, feed the sampling wiper (ie, (10) take the wheel 4 system protection pin (RT), used to control the chip The system is over-temperature protected and/or 濩, grounded via an over-temperature protection circuit and/or an over-voltage protection circuit; — ', connected to the power supply input pin (VDD) 'electricity, and the current phase of the wheel-out phase of the supply _ The foot (CS) is used for connecting the transformer in the flyback switch circuit 2 to the output end of the flyback switch circuit 2; and the machine is adapted to the high voltage of the control chip (HV) Startup, tantalum capacitor discharge voltage test, and the realization of the foot "input voltage overvoltage / undervoltage, & 1 into the rectification and electromagnetic interference filter circuit 1 output connection; Book ", monthly input wafer grounding Foot (GND) for grounding; spare pin (NC), mainly used for controlling the crystal moon The isolation between the pin and the power supply wheel, the pin can be sealed by the chip package or the pin is not sealed. P with or without the overshoot absorption circuit 7 connected in the back The switch circuit 2 is connected between a and b. The drive circuit 8 is connected between the control circuit 5 and the flyback switch circuit 2. The power supply is connected between the control circuit 5 and the flyback switch circuit 2. More specifically, the drive Circuit = connection = the control pin of the control chip in the serial circuit 5 and the gate connection of the switch tube in the flyback switch circuit 2 are between the point c and the point in Fig. 1 > the power supply circuit 6 is connected to the control circuit ^ The middle I is between the input pin and the feedback winding in the flyback switch circuit 2 (ie, connected between the electrical transmission points). _ TG point and Η 5 M422238 Figure 2 shows no between A and B A variety of connections of the snubber circuit for connecting the transient suppression diode TVS 'diode Di, resistor R, and R", and capacitor Cp, etc. Figure 3 shows the relationship between the two points C and D A variety of connection methods of the driving circuit for connecting the diode Di, and the resistors R| and R" and the like. Figure 4 shows the two points of G and η. A plurality of connections of the power supply circuit for connecting the diode Di, the resistor R·, and the capacitor Cp & Cr, etc. The over temperature protection circuit 9 is connected to the system protection pin RT of the control chip, and has an external over temperature ( 〇 TP) protection setting function and external over-voltage protection function. This function pin can be externally left unconnected! Also, I can only use one of the functions of (10) or overpressure protection function, or several protection functions when it is off. 5 shows the case where the system protection pin RT is only used for the 〇τρ protection function.
接的超=保護電路的多種接法^圖6示出了系統保護接腳RT既具有〇τρ 保濩功能又具有超壓保護功能（對於供電輸入接腳VDD的超壓保護）的情 況下所接的超溫保護電路和超壓保護電路的幾種接法。 "夕:力月b接腳HV除了具有高壓啟動功能外，還具有又電容放電和輸入 人壓二呆„b、以及AC交流電偵測功能。可以通過多功能接腳來偵測 AC父流電輸入情況。控制晶片内部可以偵測到輸入交流電欠壓的情況，此 時控制晶片將關掉從而停止輸出；控制“内部也可⑽_交流電切斷 的It況，此時多功能接腳能迅速讓多功能接腳内部連接的開關管導通到 ^ ’把X電容電荷放掉。這樣，可以不用χ電容放電電阻，可崎低待機 功耗’具體電路如圖7。 ， 其中’X電容放電功能由圖7中所示的下列元件 的ΓR1、M、以及控制晶片υι。其中，D1、一是必4 缺二，R1、R2、R3的主要作用是限流、防止靜電釋放㈤如或電壓突 Surge)等對控制晶片的破壞，可以根據具體需求調整值或刪除。 ^放魏路的要求不同，圖丨所示的電路可以衍生糊8藏12所示 根據本新型的返桃結構的開關電源電路具備轉換效率高、待機雜 -、啟動時間短且成本較低等特點，並能符合各種安全標準。 人考本ΐ型的具體實施例來描述了本新型，但是本領域技術 / _&行&種修改、組合和變更，而不會 所附申請專利範圍或其等同物限定的本新型的精神和範圍。此外， 6 M422238 附圖中=何信號箭頭應當被認為僅是示例性的，而不是限雛的，除非 ίίίΓίΓ。麵語觀見驗錄或齡_力不清料，耕或者 步驟的組合也將被認為是已經記载了。 次者 【圖式簡單說明】‘ 新型從=結合關對本新型的具體實施方式的描述中可以更好地理解本 =:二據馳機構的開關電源電路的電路圖； 了圖1中C、D兩點之間的驅動電路=ΐ 1 了圖1中G、H兩點之間的供電電路的多種接法， 溫保i電Uiir1接腳RT翻於〇τρ保護功能的情況下所接的超 此的It况下雌的般賴·和賴 …蔓力 圖7示出了多魏接聊和交流電源輸’ 之間的電路連接丨以及 ’、，正机和电磁干擾濾波電路i 的電12示出了根據本新型其他實施例之返馳機構的開關電源電路 【主要元件符號說明】 1 2 3 4 5 6 7 8 交流電源（AC)輸人整赫電卿 返馳開關· 履錢私 輸出濾波電路 回饋取樣電路 控制電路 供電電路 過沖吸收電路 驅動電路 7 M422238 9 保護電路Connected multiple = multiple connections of the protection circuit ^ Figure 6 shows the system protection pin RT has both 〇τρ protection function and overvoltage protection function (overvoltage protection for the power input pin VDD) Several methods of connecting the over-temperature protection circuit and the over-voltage protection circuit. "Xi: In addition to the high-voltage start function, the force month b pin HV also has a capacitor discharge and input human pressure two „b, and AC AC detection function. The AC parent flow can be detected through the multi-function pin. In the case of electric input, the internal voltage of the input AC can be detected inside the control chip. At this time, the control chip will be turned off to stop the output. The control can also be used internally. (10) _ AC cut-off It can be used. Quickly turn on the switch connected inside the multi-function pin to ^ 'Discharge the X capacitor. In this way, the tantalum capacitor discharge resistor can be eliminated, and the standby power consumption can be reduced. The specific circuit is shown in Fig. 7. , where the 'X capacitor discharge function is ΓR1, M, and the control chip 下列1 of the following elements shown in FIG. Among them, D1, one must be 4, and R1, R2, and R3 are mainly used to limit current, prevent electrostatic discharge (5), or voltage surge, etc., to control the damage of the wafer, and can adjust or delete according to specific needs. ^The requirements of Weilu Road are different. The circuit shown in Figure 可以 can be derived from paste 8 and 12. The switching power supply circuit according to the novel returning structure has high conversion efficiency, standby noise, short startup time and low cost. Features and meets various safety standards. The present invention is described in terms of a specific embodiment of the present invention, but is not limited to the spirit and scope of the present invention as defined by the scope of the appended claims or their equivalents. range. In addition, 6 M422238 in the drawing = the signal arrow should be considered as merely exemplary, not limited, unless ίίίΓίΓ. The face-to-face view of the test or the age of the _ force is not clear, the combination of farming or steps will also be considered as already recorded. The second [simplified description of the schema] 'New from = combination of the description of the specific implementation of the new model can better understand the circuit diagram of the switching power supply circuit of the second = 2; the C, D in Figure 1 The driving circuit between the points = ΐ 1 The various connection methods of the power supply circuit between the two points G and H in Fig. 1, the temperature protection i electric Uiir1 pin RT is turned over to the 〇τρ protection function In the case of It, the female's Lai and Lai... The vine figure 7 shows the circuit connection between the multi-wei and the AC power supply', and the electric 12 of the positive and electromagnetic interference filtering circuit i shows The switching power supply circuit of the flyback mechanism according to other embodiments of the present invention [main component symbol description] 1 2 3 4 5 6 7 8 AC power supply (AC) input human-integrated electrician return switch ● Feedback sampling circuit control circuit power supply circuit overshoot absorption circuit drive circuit 7 M422238 9 protection circuit
Cp 電容IsCp capacitor Is
Cr 電容器Cr capacitor
Di 二極體 TVS 瞬態抑制二極體 R' 電阻 R" 電阻Di Diode TVS Transient Suppression Diode R' Resistor R" Resistor