M366243 五、新型說明： ' 【新型所屬之技術領域】 . 本新型涉及開關模式電職統及其關電源控制n的控制裝置，特別 是降低關電雜人功率的開隨錢源系統，以及在負載切換過程中保 證開關模式電源控制器正常工作的控制裝置。 【先前技術】 開關模式電源（SMPS)具有尺寸小、效率高和輸出功率大的優點，被 廣泛地應用在充電ϋ、液晶顯轉、賴雜料領域。近些年，特別強 調綠色電源，即要求電源具備更高的轉換效率，尤其要求低的輕载或待機 功耗。當應用於充電器或者電源適配器時，在該電源被連接到插座上伸還 沒有連接到負載上的時候，其健消耗待機功耗。當顧於液晶顯示器時， 顯不器處於休眠模式時，僅僅需要給處於休眠模式的數位影像處理晶片提 供電源，此時的電_配H負載電流降為亳安培級，液晶顯示器系統進入 輕载節電模式。這就要求為液晶顯示器供電的開關模式電源系統在輕 電模式時輸入功率越低越好。 圖1是傳統的副邊調節開關模式電源系統的示意圖。當線電壓被施加 到該系統時，在Vcc電壓低於一門限電壓（稱為啟動電壓，Vst)的時候， ^信號並不會出現（_接腳ουτ維持低電位）。這個階段稱為開關 模式電源的啟_段彳該階段，舰電容64由經過紐後的線電愿Vin 通過開關電源控制器K)内部的高魏晶體進行充電。當Vce超過Vst時， 啟動階段結束，源控繼1G的細接_ουτ產生·信號以控制 功率開關電晶體68的導通及關斷以調節次級線圈上的輸出電壓細。由於 開關電源控制器10的操作電流在啟動階段結束之後會比開關獅控制器川 在啟動階段所需要的電流大很多’據波電容64必須在系统的正常操作期間 通過輔助驗72獲觸外量來向_電源控㈣崎供操作電流。 系統在啟動結束後’進入正常的脈衝寬度調變（pWM)工作模式:系 3 M366243 2出的輕信號觸分壓電_路分壓後，輪人到誤差放大器⑽的反 目:入端REF。誤差放大器1〇8内部集成有基準電難號，並將系統輸出 =的誤差舰放大輸出到_67的二極歸極。起職離制的光輛67 =蛋管輸出端接刺關電源控制器1〇的c〇Mp接腳，開關電源控制器 =將COMP信驗畴解爾錢.後料紐雜比娜的輸入信 諕。 系摘貞載電雜為毫安培級時，開關電職㈣工作在間歇 _丨模式下在此模式下，當C〇MP電壓低於某個域值時，開關電源 10的輸出接腳OUT不會出現開關信號；此時线的輸出頓會因 :=培_負載電流而緩慢下降，而C0MP接腳的信號也會隨輸出電壓 違㈣而升间°當C0MP電壓高於另外一個域值時，開關電源控制器10 押制m號使2_輸出電壓上升。可以通·歇模紅作的開關電源 =:?整個系統在輕罐的系統功耗。但是，在典型的液晶顯示 =，中’系統的輸人功率在輸入線電壓為彻V直流的情況下仍 毫瓦左右。 紐a#L此’針對典型的液晶顯示器應用，需要一種在*載電流降為毫安培 器關=電Γ輸入功率的裝置，而應職裝置時須保證開關模 ’、制f§i^x作不會因為雜置的引人而受到影響。 【新型内容】 及其針對卿模式電源（SMPS)，旨在提供—種開關模式電源系統 或pfL模犬原用控制器的控制裝置。作為一個例子，本新型被用於降低讀 更力声_ B顯示器的開關電源系統的輸人功率。但是本新型1有 更加廣闊的應用範圍。 I主/、有 新型—方面提供—種_氣德祕。:變麵；功率門關 電晶體；開_原控制器；光電麵合器；誤差放大器 力车開關 載控制的輪出電壓採樣網路，根據_式_載輸出 M366243 而降低Η^樣比’使件負載處於節電模式時開關電源輸出較低的電壓從 降低開關電源的輸入功率。 中式本_電壓由正以作的輸出電壓向節電模式下的輸出電壓切換過程 的回触賴下負載電流由她、的跳變過財，由於回饋網路 電壓:基準= 變或者輸出電壓過衝的作用’導致誤差放大器的反相輸入 «輸λ 大許多。因此，關電_，邮此過程中沒有開關 制器在於中Γ 制器的Vcc供電全部來自於Vcc電容。開關電源控 法4電壓切換或負載電流切換過程中仍然f 耗數百微安級的電 ♦ Vcc電麼會下降。本新型同時提供了—種開關電源控制器的控制 諸2 Vee下降到—侧值電織給·議式電源控制器電源W提供 門的正法織置，以縣__以紅倾_載切換期 :]的㊉供電。包括：高壓電晶體1合到整流後的輸人線輕，限流電 或者雜_雜打_電源控制器 跋以蚊斜提供m在其赌況下不提供電流；限流 電路，叙口到尚壓電晶體的射極與基極和開關電源控制器的電源端，合高 :=曰體的射極電流超過一定值以後通過調整基極電流從而使射極電:保 希二疋’偏置電路’竊合到高壓電晶體的集極與基極，開關電源控制器的 電源端=高«晶體控制電路’當高麼電晶體控制電路的輸出為第一種狀 態時使=塵啟動電晶體導通，而當高屢電晶體控制電路的輸出為第二種狀 態時使高壓電晶體關斷；高屋電晶體控制電路’轉合到開關電源控制器電 源電壓，當開關電源控制器電源賴低於最低工作電壓，或者開關電源控 制器處於非保賴式而且電源龍低於—個敢_，使高㈣晶體導 通’為開關電源控制器電源端所連接的電容充電。控制器故障模式信號， 用於指示控制器是否處於故障模式。 根據-實施例，本新型提供一種用於降低開關模式w在負载電流較 輕時的輸人辨的電路實現。在該實施财，在纽處於正”載電流階 5 M366243 段，由負憾㈣輸出電壓採樣控輸麟低電位，餘合刺關模式電 源輸出縣，誤紐大n反讀人端和貞餘繼賴的電阻分壓網路工 作在產生正常輸出電壓狀態下。在此狀態下，誤差放大^反相輸入端電壓 REF與輸出電壓的比值為K1。在負載電流減小至毫安培級階段，由負載產 生的輸出電壓採樣控制信號為高喊，合到開關模式電源輸出電壓和誤 差放大H反補人制電阻分壓祕工作在產生做”触電壓的狀 態。在此狀態下，誤差放大器反相輸入端電壓赃與輸出電壓的比值為係 數K2。與系統處於正常負載的情況相比，幻>幻。因此輸出電壓乂祕小 於處於正常負載X作模式的輪出電壓編卜同時，其它輸出繞組的電壓也 相應的降低。結果，使得開嶋式電_輸人功耗降低。 根據另-實補’本新型提供—觀於降側_式電_待機功耗 的電路實現。包括由三個電阻串聯電阻構成分壓電_路，齡到輸出電 壓與副邊狀間’靠近輸$電壓邮輸合麟差放大錄人端；由刪〇§ 電晶體構成受測關’電晶體的源極與汲極分別齡到副邊地和分壓電阻 網路靠近副雜祕頭，電晶體的閑缺合纟彳貞雜侧具有雜狀離的 開關控制貞憾生_制錢，高植表示貞做於正f卫作狀態， 此時分壓電阻鹏蚊開關電紅常玉作時的輸㈣壓；在此狀態下，誤 差放大器反相輸人端電壓REF與輪出電壓的比值為K1。低電位表示負載處 於節電工作狀態’此時分壓電_路蚊_電源節電讀時的輸出電 壓。在此狀態下，誤差放大器反相輸入端電壓卿與輸出電壓的比值為係 數K2。與系統處於正常負載的情況相比，❿幻。因此輸出電壓v㈣小 於處於正常負載工作模式的細電壓ν_。_，其它輸出繞組的電壓也 相應的降低。絲，使關關模式電源赌人功耗降低。 在-個實施射’在輪出電壓切換或㈣電流突然減小期間，當開關 模式電源控娜Vee «下降到—_設值時，由高職晶體提供*電 容的充電驗，並在Vee龍超職驗值之独^繼充電電流。開關模 M366243 制器通過-細部比較器和分壓電阻檢測％端的電壓信號產生 ==信號。/ VC:糕低於某—閾值編d後，比㈣輸出低電位。 日、控制減障^式指不信號Vfault表明系統未處於故障模式（M366243 V. New description: ' 【New technology field】 The new type relates to the switch mode electric service system and its control device for turning off the power supply control n, especially the open source system for reducing the power of the electrician, and A control device that ensures that the switch mode power supply controller works normally during load switching. [Prior Art] The switch mode power supply (SMPS) has the advantages of small size, high efficiency, and large output power, and is widely used in the fields of charging ϋ, liquid crystal display, and ramming materials. In recent years, the green power supply has been particularly emphasized, requiring higher power conversion efficiency, especially low light load or standby power consumption. When applied to a charger or power adapter, it consumes standby power when the power supply is connected to the outlet and is not connected to the load. When considering the liquid crystal display, when the display device is in the sleep mode, it only needs to supply power to the digital image processing chip in the sleep mode. At this time, the electric load of the H-load is reduced to ampere level, and the liquid crystal display system enters the light load. Power saving mode. This requires a switch mode power supply system that supplies the liquid crystal display to have a lower input power in the light power mode. 1 is a schematic diagram of a conventional secondary side regulated switch mode power supply system. When the line voltage is applied to the system, the ^ signal does not appear when the Vcc voltage is below a threshold voltage (called the startup voltage, Vst) (the pin ουτ remains low). This phase is called the switching mode power supply. At this stage, the ship capacitor 64 is charged by the high-definition crystal inside the switching power supply controller K). When Vce exceeds Vst, the start-up phase ends, and the source control follows the 1G fine-connected _ουτ generation signal to control the turn-on and turn-off of the power switch transistor 68 to adjust the output voltage on the secondary coil. Since the operating current of the switching power supply controller 10 is much larger than the current required by the switch lion controller in the startup phase after the start-up phase, the wave capacitor 64 must pass the auxiliary test 72 during the normal operation of the system. To supply power to the _ power supply (four). After the system is started, the system enters the normal pulse width modulation (pWM) mode: 3 M366243 2 The light signal is divided into piezoelectric _ road dividers, and the wheel is turned to the error amplifier (10): the input REF. The error amplifier 1〇8 is internally integrated with the reference electric difficulty number, and the error ship of the system output = is amplified and output to the second pole of _67. Starting off the light of the light 67 = egg tube output end of the puncture power controller 1 〇 c 〇 Mp pin, switching power supply controller = COMP letter to verify the domain of the money. Letterhead. When the pick-up power is mA, the switch power (4) works in the intermittent _ 丨 mode. In this mode, when the C 〇 MP voltage is lower than a certain value, the output pin OUT of the switching power supply 10 is not The switching signal will appear; at this time, the output of the line will slowly drop due to: = _ load current, and the signal of the C0MP pin will also rise with the output voltage violation (four) ° when the C0MP voltage is higher than another domain value The switching power supply controller 10 presses the m number to increase the 2_ output voltage. Switching power supply that can pass the mode red ==? The system power consumption of the entire system in the light tank. However, in a typical liquid crystal display =, the input power of the system is still about milliwatts with the input line voltage being V-dc. Newa #L This is a typical liquid crystal display application, which requires a device that reduces the current to mA amps = Γ input power, and the switch mode must be guaranteed when the device is used. It will not be affected by the introduction of miscellaneous. [New content] It is aimed at providing a control device for a switch mode power supply system or a pfL analog dog original controller for the Qing mode power supply (SMPS). As an example, the present invention is used to reduce the input power of a switching power supply system that reads the _B display. However, this novel 1 has a wider range of applications. I master /, there is a new type - provide a kind of _ gas secret. : variable surface; power gate off transistor; open _ original controller; photoelectric surface combiner; error amplifier power car switch control of the wheel voltage sampling network, according to _ type _ load output M366243 and reduce Η ^ sample ratio ' When the load is in the power saving mode, the switching power supply outputs a lower voltage to lower the input power of the switching power supply. The Chinese version of the _ voltage from the output voltage of the current output voltage to the output voltage switching process in the power-saving mode of the return load current from her jump, due to feedback network voltage: reference = change or output voltage overshoot The effect 'causes the inverting input of the error amplifier «transmission λ is much larger. Therefore, there is no switching device in the process of powering down. The Vcc power supply of the middle controller is all from the Vcc capacitor. Switching power supply control 4 voltage switching or load current switching process still f consumes hundreds of microamps of power ♦ Vcc power will drop. The novel also provides a control of the switching power supply controller. 2 Vee drops to - the side value of the electric weave to the power supply controller of the power supply controller W provides the positive method of the door, with the county __ red dumping load switching period :] Ten power supplies. Including: high-voltage transistor 1 is connected to the rectified input line light, current-limiting or miscellaneous _ miscellaneous _ power controller 跋 mosquito slant provides m does not provide current under its gambling condition; current limiting circuit, Xukou To the emitter and base of the still piezoelectric crystal and the power supply terminal of the switching power supply controller, the height is high: = the emitter current of the body exceeds a certain value, and then the base current is adjusted to make the emitter electric: Bao Xi Er' The bias circuit 'stealing to the collector and base of the high voltage transistor, the power supply terminal of the switching power supply controller = high «crystal control circuit' when the output of the transistor control circuit is the first state makes the dust The transistor is turned on, and the high voltage transistor is turned off when the output of the high-voltage transistor control circuit is in the second state; the high-voltage transistor control circuit 'turns to the switching power supply controller power supply voltage when the switching power supply controller The power supply is lower than the minimum operating voltage, or the switching power supply controller is in a non-guaranteed manner and the power supply is lower than - a dare _, so that the high (four) crystal conduction 'charges the capacitor connected to the power supply terminal of the switching power supply controller. Controller failure mode signal, used to indicate whether the controller is in failure mode. According to an embodiment, the present invention provides a circuit implementation for reducing the switching mode w when the load current is light. In the implementation of the financial, the New Zealand is in the positive "current current level 5 M366243 segment, from the negative regret (four) output voltage sampling control to the low potential of the Lin, the balance of the puncture mode power supply county, the wrong big n re-read the human end and surplus The resistor divider network operates according to the normal output voltage state. In this state, the ratio of the error amplification to the inverting input terminal voltage REF to the output voltage is K1. During the load current reduction to the milliampere level, The output voltage sampling control signal generated by the load is high shouting, and the switching mode power supply output voltage and the error amplification H anti-compensation resistor divider work in the state of generating the "touch voltage". In this state, the ratio of the voltage 赃 of the inverting input terminal of the error amplifier to the output voltage is the coefficient K2. Compared to the situation where the system is under normal load, Magic &Magic; Therefore, the output voltage is less than the output voltage of the normal load X mode, and the voltages of the other output windings are correspondingly reduced. As a result, the power consumption of the open circuit type is reduced. According to the other-real complement, the present invention provides a circuit realization of the falling side _ type electric_standby power consumption. Including three resistors and series resistors to form a sub-piezoelectric _ road, the age to the output voltage and the sub-edge between the 'near the $ voltage and the singularity difference to enlarge the recording end; by deleting § the transistor constitutes the measured off 'electricity The source and the bottom of the crystal are adjacent to the secondary side and the voltage divider resistor network is close to the secondary miscellaneous head. The free side of the transistor has a heterogeneous switch control. Gao Zhi said that he is doing the state of Zheng Weiwei. At this time, the voltage divider resistor is switched to the electric (C) voltage; in this state, the error amplifier reverses the input voltage REF and the voltage of the wheel. The ratio is K1. The low potential indicates that the load is in the power-saving operating state. At this time, the output voltage of the piezoelectric _ mosquito mosquito _ power saving reading is divided. In this state, the ratio of the voltage at the inverting input of the error amplifier to the output voltage is the coefficient K2. Compared with the situation where the system is under normal load, it is illusory. Therefore, the output voltage v(4) is smaller than the fine voltage ν_ in the normal load mode of operation. _, the voltage of the other output windings also decreases accordingly. Wire, which reduces the power consumption of the power-off gambler. During the implementation of the 'in the turn-off voltage switching or (four) the sudden decrease in current, when the switch mode power supply control Vie «down to -_ set value, the high-performance crystal provides * capacitor charging test, and in Vee Dragon The over-the-counter verification value is the same as the charging current. The switch mode M366243 generates a == signal through the - detail comparator and the voltage divider resistor to detect the voltage signal at the % terminal. / VC: After the cake is below a certain threshold, the output is lower than (4). Day, control obstacle reduction ^ means no signal Vfault indicates that the system is not in failure mode (
Vfault ，_高_體通過_給I。綠，由於高 壓電曰曰體的充電，Vee電容上的電壓上升，使電壓_ 之上， 開關模式魏㈣H將高壓電晶體酬。偏df㈣於控削最小工作電 ，細〇 ’從而保證開關模式電源控制器在負載電流或·突變時保持正 书工作。Vfault, _high_body passes _ to I. Green, due to the charging of the high-voltage piezoelectric body, the voltage on the Vee capacitor rises, making the voltage _ above, the switching mode Wei (four) H will pay for the high-voltage transistor. The partial df (4) is used to control the minimum working power and fine ’ to ensure that the switch mode power supply controller maintains the book operation during load current or sudden change.
T本新型，當練電流減小而處㈣電模式時，由於關模式電源 2出電壓崎低，降低了纽的輸人功率；同時高壓電晶體在輪出電壓切 2程巾娜W «關-定健產生充電概，健了關模式電源 在輸出電壓切換過程中的正常工作。 【實施方式】 如圖1所示，傳統的副邊調節開關模式電源系統包括交流輸入整流橋 6卜據波電容62產生整流後的輸入賴Vin ;變壓器7〇 ;副邊繞組整流二 極體Μ和據波電容75 ;輔助繞組整流二極體65和渡波電容私；開關= 控制器10 ;功率開關電晶體68 ;原邊電流取樣電阻69 ;分壓電阻u〇、12〇 所組成的輸出電壓採樣網路；誤差放A|| ;錄67。關電源控制器 10具有電源端VCC、回饋端COMP、輸出端〇υτ、電流採樣端CS 壓啟動端HV。 呵 系統上電後’ Vin通過片外電阻76經HV端及控制器内部電路向據波 電谷64充電。當濾波電容64電壓超過啟動電壓Vst後，OUT端開始輸出 開關脈衝’將原邊繞組71中的能量轉移到副邊繞組78和輔助繞組72 ;此 時内部電路切斷HV端向濾波電容64的充電路徑’濾波電容64的能量由 輔助繞组72提供。誤差放大器108將ref端的v〇ut採樣信號與内建的參 考電壓比較’將誤差信號放大後通過光耦67傳送到開關電源控制器1〇的 M366243 ::;r 如圖 不的得統«式m⑽輸出龍制植。對 的應用，如充電器或適配器，固錄出電遷㈣宜的。對於其他的應用，、‘， 磁㈣電源’固定輸出龍關模式賴、在液晶顯示器處於節電 =睡目f式）日_坏峨Μ耗，瞻晶咖處於節電 、j’，，「所需制電流為毫安培級，所f要的電壓低於正常工作時的數 祕採用餘濟的方法最大幅度地降侧義源在負載u處於節電模式時 的輸入功率，就是本新型的目的。 圖2展示了本新型的基本原理。除了將分壓電阻m改為一可變電阻 ⑵之外’圖中元件標號與圖丄一致。與傳統的開關模式電源相比，本新型 =新之處在於將負載12產__信號㈤哪）連_輸出電壓 綠網路’使得雜謂F到VGUt的鍾比在節電工料和正常工作時不 ^ ’節電工作時REF/V〇ut之值大於正常工作時刪⑽的值，從而使節 電工作時編降低。由於變壓器7〇的交叉叙合，開關電源控制器ι〇的電 源電壓W也相應降低’在同樣的負載12電流與開關電源控制器1〇工作 電流的情況下，副邊繞組78與_繞組72輸_功率同時下降，達到了 降低開關《、輸人功率的目的。實際纽例如液晶顯示器在處於節電工作 模式時，系統的輸出電壓只需要維持最小的工作電流，此電流錢安培級。 圖3展示了本新型的—個實施例。除圖2中可變電阻i2i改為兩支電 阻U5與116串聯夕卜，圖中元件標號與圖2 一致。負載12產生的節電控制 信號（Vsleepl)耦合到電阻115與116的公共節點。在本例中，信 號具有兩錄態：副邊地（_)與高阻態。Vsleepl為地電位時，v〇ut/j姬 等於（謂糊15)，系統輸出正常工作龍；純制為高阻態時， Vom/REF等於[l+Rii〇/(R115+R1i6)] ’系統輸出較低的工作電壓。 M366243 圖4展示了本新型的另一個實施例。除在圖中增加開關丨17外， 本圖中元件標號與圖3 —致。NMOS開關117與電阻110並聯，負載12產 生的節電控制信號（Vsleep2)耦合到_〇8開關117的閘極◊在本例中， Vsleep2信號具有兩個狀態：高電位與副邊&(GND)。Vsleep2為高電位時， NMOS開關1Π導通，忽略其導通電阻，v〇u雜F等於（1+Rn〇/Rii5)， 系統輸出正常工作電壓；Vsleep2為地電位時，v〇ut/R£F等於 [1+R110/(R115+R116)] ’系統輸出較低的工作電壓。T this new type, when the current is reduced (4) electric mode, because the off mode power supply 2 output voltage is low, reducing the input power of the New Zealand; while the high voltage transistor is in the turn-off voltage cut 2 strokes towel W « Off-Dingjian generates charging overview, and the closed mode power supply works normally during the output voltage switching process. [Embodiment] As shown in FIG. 1, the conventional secondary side regulation switch mode power supply system includes an AC input rectifier bridge 6 and a wave capacitor 62 to generate a rectified input input Vin; a transformer 7 〇; a secondary winding rectifying diode Μ And wave capacitor 75; auxiliary winding rectifier diode 65 and wave capacitor private; switch = controller 10; power switch transistor 68; primary current sampling resistor 69; voltage divider resistor u〇, 12〇 output voltage Sampling network; error placed A||; recorded 67. The power controller 10 has a power terminal VCC, a feedback terminal COMP, an output terminal 〇υτ, and a current sampling terminal CS voltage starting terminal HV. After the system is powered up, Vin is charged to the wave valley 64 via the HV terminal and the internal circuit of the controller through the off-chip resistor 76. When the voltage of the filter capacitor 64 exceeds the startup voltage Vst, the OUT terminal starts to output the switching pulse 'transfers the energy in the primary winding 71 to the secondary winding 78 and the auxiliary winding 72; at this time, the internal circuit cuts off the HV terminal toward the filter capacitor 64. The energy of the charging path 'filter capacitor 64 is provided by the auxiliary winding 72. The error amplifier 108 compares the v〇ut sampling signal of the ref terminal with the built-in reference voltage. 'Amplifies the error signal and transmits it to the switching power supply controller 1 through the optocoupler 67. M366243 :::r m (10) output dragon planting. For applications such as chargers or adapters, it is advisable to record the relocation (four). For other applications, ', magnetic (four) power supply 'fixed output dragon off mode, in the liquid crystal display is in power saving = sleepy f type) day _ bad consumption, Zhanjing coffee is in power saving, j',, "required The current is measured in milliamperes, and the voltage required by f is lower than that of the normal operation. The method of using Yuji to reduce the input power of the source when the load u is in the power saving mode is the purpose of the present invention. 2 shows the basic principle of the new model. In addition to changing the voltage dividing resistor m to a variable resistor (2), the component numbers in the figure are the same as those in the figure. Compared with the traditional switch mode power supply, the new type = new Will load 12 produce __ signal (five) which) _ output voltage green network 'make the miscellaneous F to VGUt clock than in the electrical materials and normal work time ^ 'power saving work REF / V 〇ut value is greater than normal work When the value of (10) is deleted, the programming is reduced when the power saving operation is completed. Due to the cross-combination of the transformer 7〇, the power supply voltage W of the switching power supply controller 相应 is also reduced accordingly 'in the same load 12 current and the switching power supply controller 1〇 In the case of operating current, The side winding 78 and the _ winding 72 are simultaneously reduced in power, which achieves the purpose of reducing the switch "and the input power. Actually, for example, when the liquid crystal display is in the power saving mode, the output voltage of the system only needs to maintain a minimum operating current. The current is in the form of an amperage. Figure 3 shows an embodiment of the present invention. In addition to the variable resistor i2i in Figure 2, the two resistors U5 and 116 are connected in series, and the components in the figure are identical to those in Figure 2. The load 12 is generated. The power save control signal (Vsleepl) is coupled to the common node of resistors 115 and 116. In this example, the signal has two recorded states: the secondary side (_) and the high impedance state. When Vsleepl is the ground potential, v〇ut/j Equal to (say paste 15), the system outputs a normal working dragon; when purely high impedance, Vom/REF is equal to [l+Rii〇/(R115+R1i6)] 'the system outputs a lower operating voltage. M366243 Figure 4 shows Another embodiment of the present invention, except that the switch 丨17 is added to the figure, the component numbers in this figure are the same as those in Fig. 3. The NMOS switch 117 is connected in parallel with the resistor 110, and the power saving control signal (Vsleep2) generated by the load 12 is coupled to _〇8 switch 117 gate ◊ in this example The Vsleep2 signal has two states: high potential and secondary side & (GND). When Vsleep2 is high, the NMOS switch 1 turns on, ignoring its on-resistance, v〇u is equal to F (1+Rn〇/Rii5), the system Output normal operating voltage; when Vsleep2 is ground, v〇ut/R£F is equal to [1+R110/(R115+R116)] 'the system output lower operating voltage.
圖3與圖4僅僅是示例，不應被視為是對於本新型的範圍的任何限制。 本領域的技術人員可m«到其他的變形、改變以及替代方式。 圖5是圖2中的_模式電源（SMps)控的原_。如圖所示， 81為達林頓連接的高壓電晶體，82為高壓電晶體81的偏置電路，％ =電晶體81的限流電路，84為高壓電晶體81導通與關斷控制電路。高 電曰日體81通制外餘76雜合到紐後的輸人線龍^、限流電路 ϋ TtlTm V ° ^ i t 1壓CC低於某—設定值Vh〇ld時高壓電晶體81導通提供電流， 、’在，、他情況下高壓電晶體81騎，不提供電流。 的電^電合™電晶體81 _與基極和開_、控制器 的射103和丽⑶電晶體104組成。當高壓電晶體81 大：=;::， 81 10 輸出魏電位時高壓電晶體81關斷。胃U斷控制電路84的 Μ電曰曰體81導通與騎控制電路84’輕合到開關電源控制器電 9 M366243 源電壓Vcc由人壓鎖定（uylo)比較器％、電源電壓維持比較器97， 刀壓電阻94、96、98以及邏輯閘1〇1、1〇2組成。當開關電源控制器⑺電 源電壓Vcc低於最低工作電壓Vuvl〇，或者開關電源控制器ι〇處於非保護 模式而且獅f壓Vee低於轉链VhQid時，稍麟㈣電路84使 祕電晶體81導通，為開關魏控制器1()電源所連接的濾波電容科充電。 開關電源控制器10故障模式信號Vfault，用於指示開關電源控制器⑺ 是否處於故障模式，例如輸出端短路，開關電源控制器10過熱等異常情況。 圖6為圖5所示系統與電财主要節點的電驗形。系統上電後，VIn P幵1始上升系統處於啟麵段，欠壓鎖定（WL〇)比較器％翻轉電壓為 vst ’在Vcc低於Vst階段，欠壓鎖定比較器93的輸出·ie為低電位， OUT端輸出低電位，功率開關電晶體68截止。同時顧〇s電晶體99截止， ^及端呈高阻態，偏置電路82中的PM〇s電晶體％截止，*通過片内 同壓電阻90為同壓電晶體81提供基極電流，該電流被放大後作為I濾 波電容64的充電電流。當Vcc電壓超過*後，欠壓鎖定比較器％的翻 轉電壓變·關電源控制器1G電源最低工倾壓Vuvl。，輸出恤此變為 高電位’ OUT端輸出脈衝信號’蘭〇s電晶體料通，偏置電路幻使高 塵電晶體81的基極電堡等於或小於射極電壓，高壓電晶體81截止，* 的供電由辅助敝72來實現。當關電源控制㈣處於雜障模式(偏【 為低電位）時’系統正常工作模式與節能模式的跳變或者負載丨2的跳變可 能使得Vcc電壓下降，當Vcc低於…灿電壓時，電源魏維持比較器 輸出低電位’ NMOS電晶體99騎’高壓電晶體81導通，施通過高麼電 晶體81為Vcc遽波電容&充電，使Vcc電壓維持在外咖附近，高於最 小工作電壓制❶，使系統正常工作模式與節能模式的跳變或者負載Η的 跳變不會使Vcc低於Vuvlo而導致系統進入重新開機狀態。 當開關電源系統出現異常情況，例如輸出端短路，開關電源控制器ι〇 過熱等’開關躲控制器10進入故障模式，Vfault信號變為高電位，㈣ M366243 端輸出為低電位。這種情況下Vcc下降到低於外也時高壓電晶體8i也不 會導通，因為邏輯F甲1 101遮罩了 Vcc電源電壓維持比較胃97的輸出。當 Vcc下降_關電雜㈣1G最低卫作電壓制。之下時，欠壓鎖定 (UVLO)比較器93輸出端Enable變為低電位，欠壓鎖定（UVL〇)比較 器93的翻轉電壓變為啟動電壓Vst，純進人重新開機狀態。 雖然本新赌合上述的實蘭進行描述，但是侧顯本卿不限於這 些實施例。本領賴技術人員可以剌種觀變、變化和_實現而不脫 離本新型的設計原理4新型的_應當由權利要求限定H錄上面是針 對開關模式電源祕_邊控輪觀構進行描述，但是本也可被用 於原邊控制關_式電源祕。因而本新躺贿細並不被上述實施 例所限’而應献符合t請專利範圍提_創新性特徵的最大範圍。 【圓式簡單說明】 圖卜是傳統_邊靖_模式電獅統的示意框圖； 圖2 ’是應用本新型關關模式電源的簡化框圖； 圖3 ’是本新型的一個實施例； 圖4，是本新型的另一個實施例； 圖5，是朗本新翻_模式電源控彻的簡化框圖； 圖6 ’是_本新型的㈣模式電源控彻關鍵節點的波形圖。 【主要元件符號說明】 10...... „ 12...... •開關電源控制器 61 ·. •負載 62...... i流輸入整流橋 64 ·..... ..濾波電容 65...... •濾波電容 67...... .補助繞組整流二極體 11 •功率開關電晶體 •原邊電流取樣電阻 *變壓器 •原邊繞組 •輔助繞組 •副邊繞組整流二極體 •濾波電容 •片外電阻 副邊繞組 •高壓電晶體 •偏置電路 •限流電路 •導通與關斷控制電路 •片内高壓電阻 •電流源 • PMOS電晶體 •欠壓鎖定比較器 •分壓電阻 .PMOS電晶體 •分壓電阻 •電源電壓維持比較器 •分壓電阻 • NMOS電晶體 ••邏輯閘 ••邏輯閘 ••限流電阻 12 M366243 104..............NMOS電晶體 108..............誤差放大器 110..............分壓電阻 115 ..............電阻 116 ..............電阻 117 ..............NMOS 開關 120 ..............分壓電阻 121 ..............可變電阻3 and 4 are merely examples and should not be considered as limiting the scope of the novel. Those skilled in the art can m« to other variations, modifications, and alternatives. Figure 5 is the original _ of the _ mode power supply (SMps) control of Figure 2. As shown, 81 is a Darlington connected high voltage transistor, 82 is a bias circuit of the high voltage transistor 81, % = a current limiting circuit of the transistor 81, and 84 is a high voltage transistor 81 turned on and off. Control circuit. High-powered 曰 曰 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 Turning on provides current, 'in, in his case, high voltage transistor 81 rides, no current is supplied. The electro-conducting TM transistor 81 is composed of a base and an open_, a controller 103, and a MN (104) transistor 104. When the high voltage transistor 81 is large: =;::, 81 10, the high voltage transistor 81 is turned off when the Wei potential is output. The electric body 81 of the gastric U-break control circuit 84 is turned on and the riding control circuit 84' is lightly coupled to the switching power supply controller. 9 M366243 The source voltage Vcc is locked by the human pressure (uylo) comparator, the power supply voltage is maintained by the comparator 97. , the knife resistors 94, 96, 98 and the logic gates 1〇1, 1〇2. When the switching power supply controller (7) power supply voltage Vcc is lower than the minimum operating voltage Vuvl〇, or the switching power supply controller 〇 is in the unprotected mode and the lion f pressure Vee is lower than the chain VhQid, the slightly lin (four) circuit 84 makes the secret crystal 81 Turn on, charge the filter capacitor connected to the power supply of the switch controller 1 (). The switching power supply controller 10 fault mode signal Vfault is used to indicate whether the switching power supply controller (7) is in a fault mode, such as an output terminal short circuit, and the switching power supply controller 10 is overheated and the like. FIG. 6 is a pictogram of the system shown in FIG. 5 and the main node of the electricity. After the system is powered on, VIn P幵1 starts to rise and the system is in the open section. The undervoltage lockout (WL〇) comparator % flip voltage is vst'. When Vcc is lower than Vst, the output of the undervoltage lockout comparator 93 is Low potential, the OUT terminal outputs a low potential, and the power switch transistor 68 is turned off. At the same time, the 99 电 transistor 99 is turned off, the ^ and the end are in a high-resistance state, and the PM 〇s transistor in the bias circuit 82 is turned off, and the base current is supplied to the same piezoelectric crystal 81 through the on-chip same-voltage resistor 90. This current is amplified to be the charging current of the I filter capacitor 64. When the Vcc voltage exceeds *, the undervoltage lockout comparator % turns over the voltage and turns off the power supply controller 1G power supply minimum tilt voltage Vuvl. The output shirt becomes a high potential 'OUT terminal output pulse signal' Lancome s transistor material pass, the bias circuit imaginary high dust crystal 81 base electric castle is equal to or less than the emitter voltage, high voltage transistor 81 By the end, the power supply of * is realized by the auxiliary port 72. When the power control (4) is in the noise barrier mode (when [bias], the transition of the system normal operation mode and the energy-saving mode or the jump of the load 丨2 may cause the Vcc voltage to drop, when Vcc is lower than...can, The power supply maintains the comparator output low potential ' NMOS transistor 99 rides 'high voltage transistor 81 is turned on, applies high transistor 81 for Vcc chopper capacitor & charging, so that Vcc voltage is maintained near the outside, higher than the minimum work The voltage system makes the system's normal working mode and energy-saving mode jump or the load Η jump will not make Vcc lower than Vuvlo and cause the system to enter the restart state. When the switching power supply system has an abnormal condition, such as a short circuit at the output terminal, the switching power supply controller 过热 过热 superheats, etc., the switch enters the fault mode, the Vfault signal goes high, and (4) the output of the M366243 terminal is low. In this case, the high voltage transistor 8i is not turned on when Vcc falls below the outside because the logic F1 101 masks the Vcc supply voltage to maintain the output of the stomach 97. When Vcc drops _ off the power (four) 1G minimum guard voltage system. Below, the output of the undervoltage lockout (UVLO) comparator 93 becomes low, and the inversion voltage of the undervoltage lockout (UVL〇) comparator 93 becomes the startup voltage Vst, which is purely turned back on. Although this new bet is described in connection with the above-mentioned real, it is not limited to these embodiments. The technical staff can make observations, changes and implementations without departing from the design principle of the new type. 4 New type should be defined by the claims. The above description is for the switch mode power supply _ side control wheel view, but This can also be used for the primary side control _ type power secret. Therefore, the new bribe is not limited by the above-mentioned embodiments, and the maximum scope of the innovative features of the patent scope is met. [Circular Simple Description] Figure Bu is a schematic block diagram of the traditional _Bianjing_mode electric lion system; Figure 2' is a simplified block diagram of the application of the new mode power supply; Figure 3' is an embodiment of the present invention; Figure 4 is another embodiment of the present invention; Figure 5 is a simplified block diagram of the Ronben's new _ mode power control; Figure 6 ' is a waveform diagram of the new (four) mode power control key node. [Main component symbol description] 10... „ 12... • Switching power supply controller 61 ·. • Load 62... i-stream input rectifier bridge 64 ·..... ..Filter Capacitor 65... •Filter Capacitor 67....Support Winding Rectifier Diode 11 •Power Switching Transistor •Primary Current Sampling Resistor*Transformer •Primary Winding •Auxiliary Winding • Secondary winding rectifier diode • Filter capacitor • Off-chip resistor secondary winding • High voltage transistor • Bias circuit • Current limiting circuit • On and off control circuit • On-chip high voltage resistor • Current source • PMOS transistor • Undervoltage Lockout Comparator • Divider Resistor. PMOS Transistor • Divider Resistor • Supply Voltage Hold Comparator • Divider Resistor • NMOS Transistor • • Logic Gate • Logic Gate • Current Limiting Resistor 12 M366243 104... ........... NMOS transistor 108.............. error amplifier 110..............dividing resistor 115 ..............resistance 116 ..............resistance 117 ............. NMOS switch 120 . .............Divider resistor 121 ..............Variable resistor
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