TWI283808B

TWI283808B - Method and apparatus for power supply having brownout protection

Info

Publication number: TWI283808B
Application number: TW94127933A
Authority: TW
Inventors: Kuang-Chih Shih
Original assignee: System General Corp
Priority date: 2005-08-16
Filing date: 2005-08-16
Publication date: 2007-07-11
Also published as: TW200708928A

Abstract

An apparatus of power supplies having brownout protection and a method thereof are proposed. As brownout condition occurs, the apparatus informs a microprocessor to proceed with the shutdown process timely. The apparatus includes a power factor correction (PFC) circuit; a bus capacitor generating a bus voltage by receiving an input voltage via the PFC circuit; a PWM circuit generating multiple output voltages for the microprocessor; a supervisor circuit generating a power-good signal in response to a proportional bus voltage; a brownout circuit for disabling the boosting operation of the PFC circuit under brownout conditions. While the PFC circuit is disabled, the bus voltage will start to fall. As the proportional bus voltage is lower than a threshold voltage, the supervisor circuit generates the power-good signal. Therefore, the microprocessor can proceed with the shutdown procedure timely.

Description

1283808 九、發明說明：【發明所屬之技術領域】本發明為一種含有功因校正電路的電源供應器之過低電壓保護方法，尤指一種可提供微處理器於輸入電壓過低下，先行完成關機程序之電源供 5 應器及方法。【先前技術】電源供應器係用以提供電子裝置運作時電力來源。當電源出現異常，電子裝置(如主機板)上之微處理器必須有一段時間處理關機程序。當電源供應器在輸入電壓低於保護電壓時，通常會截止其運作以避免毁損。此時 10若微處理器未能及時完成關機處理程序，將造成資料之流失。清參考第-圖’其係u知包含功目校正電路的電源供應器之電路示意圖。以下將透第-圖說明該習知包含功因校正電路的電源供應器在輸入電壓過低時如何進行保護。電源供應器20係透過一個過低電壓偵測電路22〇監控輸入電壓 15 (如經過橋式整流後的電源調整賴ν·)，並在輸人電壓Vin小於保護電壓的狀況下，產生-過低電壓保護訊號Sb〇，使待機電路23〇立即戴止功因校正電路240、轉換電路25〇及監控器細之工作電源& ;因此使得電源供應器2〇之輸出電壓Vc)UT也立即截止，所以微處㈣1G便無法在輸出電壓v0U1^止之前，依據監控器26〇輸出的電源良好訊號v吻先 20 行完成關機程序(如儲存資料）。配合第一圖，第二圖係為習知包含功因校正電路的電源供應器之過低電壓保護時序圖。當過低電壓摘測電路22〇產生過低電壓保護訊號 B〇 (兩 1283808 U hi Ά替換頁準位）時，轉換電路250之工作電源Vcc立即被截止(低準位），使得轉換電路250中的脈波調變訊號sPWM截止(低準位），導致輸出電壓Vwt也相對截止(低準位），同時監控器260之工作電源Vcc也被截止，造成電源良好訊號VPG0也相應截止(低準位）。因為輸出電壓ν〇υτ之截止，使得與電源供應器20耦接之微處理器1〇失去電源而無法先行完成關機程序。配合第一圖，請參考第三圖，為習知包含功因校正電路的電源供應器之過低電壓保護方法流程圖。首先電源供應器2〇利用過低電壓偵測電路 220確認輸入電壓νΙΝ是否小於保護電壓（步驟11〇);若是小於保護電壓，則過低電壓债測電路220產生過低電壓保護訊號Sb〇 (步驟12〇)給待機 10電路230，最後待機電路230將截止功因校正電路240、轉換電路250、與監控器260之工作電源vcc (步驟130)。如上所述，習知包含功因校正電路的電源供應器2〇雖已成為市場的主流’但在輸人賴過低而無法使與其雛的貞鑛持正常運作之前，先提供一延遲時間，使微處理器適時完成處理程序。 15 【發明内容】有鑑於此，本發明提出一種具過低電壓保護系統的電源供應器及過低電壓保羞方法，平日守用以提供麵接之微處理器所需之電壓，並在過低輸入電壓供應下，得以控制-電源良好訊號，使微處·在電源供應器的輸出電壓截止前，可以先行完成關機程序。 2〇本發明一種具過低電壓保護系統的電源供應器，包括有：-功因校正電路，係進行功因校正及對輸人電壓進行昇壓動作；—匯流排電容，係接收該功因校正電路輸出之電壓’並於其兩端形成—隨排電壓；一轉換電終-/ 1283808 路，係轉換該匯流排糕，用以提供一輸出電屡到該微處理器。過低電壓偵測用來停止該功因校正電路的昇一監控器，雜據等_之該嶋_，_峰_数處理益的一電《好訊號使職處顧可先行完綱機程序；— 電路，係於該輸入電壓低於一保護電壓時，壓動作。上述梅繼，她獅_梅^_版賴是否小於預設之保護電壓；若低於預設之保護電壓，.止功因校正電路之昇壓她由於電源供簡的繼會偵測，並判斷該等比例之匯流排電壓疋否小於-臨界訊號；若是小於臨界訊號，則控制該電源良好訊號，以使該微處理器先行完成關機程序。以上的概述與接下來的詳細制皆為示範性f，是為了進—步說明本發明的巾請專利翻。而有關本發_其他目的與優點，將在後續的說明與圖式加以闡述。【實施方式】 15 第四_繪示本發明具過低電壓保齡統之電源供應器的電路方塊圖’電源供應器20a係供應叙接的一微處理@舰所需之工作電壓，並於 -輸入電壓vIN過低下，提供—延遲時間’使該微處理器i〇a可先行完成關機程序。電源供應器20a包括有：-功因校正電路施接收該輸入電壓l (如 20經過橋式整流後的電源調整電壓Vrect)，並進行功因校正及對該輸入電壓 VIN昇壓。功因校正電路240a包含有功因校正控制器（未標示）與功因校正功率電路（未標示）。 1283808 ：10/^43 IL· ;則控制功因校正功率電路作====__敝議晰昇壓動 m隻财丄该功因校正控制器截止昇壓動作；一匯流排雷灾、L排電谷Q接於該功因校正電路240a的輪出端，並於兩形成一匯流排電壓。 5 10 一轉換電路250a連接於該匯流 L徘電办Cb，係根據該匯流排電壓νβης，用以提供-輸出賴ν〇υτ到該微處理器收。一監控益麻與該微處理器10a _，係侧等比例匯流排電壓如細财卿之電糊峨VpGi)，_織峨微處㈣ l〇a之一電源良好訊號VPG0,該電源良好訊叙⑽係可控制該微處理器伽立即進行關機程序（如儲存資料··等）。 -過低賴_電路施連接機功因校正電路麻，係於該輪入電壓VIN低於預設的保護電壓後，經過—個預設時間，將產生—個過低電壓保護城SB0，用來停止該功因校正電路2他的昇壓動作。其中，當該輸入電壓vIN過低，該功因校正電路24加即停止昇壓的工 15作，因此該匯流排電壓VBUS會逐漸衰減，直到與輸入電壓ViN才目同。因此根據匯流排電壓VBUS可確認輸入電壓vIN是否穩定。 S電源轉換δίΐϊ虎Vpgi低於監控器260a設定之一臨界訊號Vth時臣Α» 控器260a即切換電源良好訊號VPG0 (如由高電位切換至低電位），使微户理器10a先行完成關機程序。此外，當匯流排電壓開始下降時，該轉換電 20 路250a之輸出電壓V0UT即開始下降，然而透過轉換電路25〇a之回授將立即令其一脈寬調變訊號SpwM之工作週期逐漸拉寬，以穩定輪出♦芦 V〇ut’由於V〇ut與Vbus之關係為· )正替換頁 ^2838〇8 ^ουτ V〇1283808 IX. Description of the Invention: [Technical Field] The present invention is an over-voltage protection method for a power supply including a power factor correction circuit, and more particularly, a microprocessor can be provided to perform a shutdown first when the input voltage is too low. The power supply of the program is for the 5th device and method. [Prior Art] A power supply is used to provide a source of power when an electronic device operates. When the power supply is abnormal, the microprocessor on the electronic device (such as the motherboard) must have a shutdown program for a period of time. When the power supply is below the protection voltage, the power supply usually shuts down to avoid damage. At this time, if the microprocessor fails to complete the shutdown processing procedure in time, it will result in the loss of data. Referring to Figure-FIG., it is a schematic diagram of a circuit of a power supply including a power correction circuit. The following is a diagram to illustrate how the conventional power supply including the power factor correction circuit protects when the input voltage is too low. The power supply 20 monitors the input voltage 15 through an over-voltage detection circuit 22 (such as the power supply adjustment after the bridge rectification), and generates and passes the input voltage Vin less than the protection voltage. The low voltage protection signal Sb〇 causes the standby circuit 23 to immediately wear the stop function due to the correction circuit 240, the conversion circuit 25〇, and the monitor operating power supply &; thus, the output voltage Vc) of the power supply 2 is also immediately As of cutoff, so the micro (4) 1G can not complete the shutdown procedure (such as storing data) according to the power good signal v of the monitor 26〇 before the output voltage v0U1^. In conjunction with the first figure, the second figure is a low voltage protection timing diagram of a conventional power supply including a power factor correction circuit. When the low voltage circuit 22 has generated the low voltage protection signal B (two 1283808 U hi Ά replacement page level), the operating power Vcc of the conversion circuit 250 is immediately turned off (low level), so that the conversion circuit 250 The pulse modulation signal sPWM cutoff (low level) causes the output voltage Vwt to be relatively off (low level), and the operating power supply Vcc of the monitor 260 is also turned off, causing the power good signal VPG0 to also be cut off (low Level). Because of the cutoff of the output voltage ν 〇υ τ, the microprocessor 1 coupled to the power supply 20 loses power and cannot complete the shutdown procedure first. With reference to the first figure, please refer to the third figure, which is a flow chart of the over-voltage protection method of the power supply including the power factor correction circuit. First, the power supply unit 2 uses the low voltage detecting circuit 220 to confirm whether the input voltage ν 小于 is smaller than the protection voltage (step 11 〇); if it is less than the protection voltage, the excessive low voltage debt detecting circuit 220 generates an excessive low voltage protection signal Sb 〇 ( Step 12:) to the standby 10 circuit 230, and finally the standby circuit 230 will cut off the power factor correction circuit 240, the conversion circuit 250, and the operating power supply vcc of the monitor 260 (step 130). As mentioned above, it is known that the power supply 2 including the power factor correction circuit has become the mainstream of the market, but it provides a delay time before the loser is too low to operate normally. Let the microprocessor complete the processing at the right time. 15 SUMMARY OF THE INVENTION In view of this, the present invention provides a power supply with a low voltage protection system and a method of shoddy over-voltage, which is used to provide the voltage required for the interface microprocessor. Under low input voltage supply, it is possible to control the power good signal, so that the shutdown process can be completed before the output voltage of the power supply is cut off. 2〇 A power supply device with a low voltage protection system includes: a power factor correction circuit for performing power factor correction and boosting an input voltage; and a bus bar capacitor for receiving the power factor The voltage output from the correction circuit is 'formed at its two ends--distributed voltage; a conversion end-/1283808 way is to convert the bus bar cake to provide an output power to the microprocessor. The low voltage detection is used to stop the power-down correction circuit of the monitor, the data, etc. _, _ peak_number processing benefits of a good "good signal to enable the office to complete the program; – The circuit is operated when the input voltage is lower than a protection voltage. The above-mentioned Mei Ji, her lion _ Mei ^ _ version Lai is less than the preset protection voltage; if it is lower than the preset protection voltage, the stop power is corrected by the correction circuit, she is detected by the power supply, and It is determined whether the bus voltage of the proportional ratio is less than a -critical signal; if it is less than the critical signal, the power good signal is controlled to enable the microprocessor to complete the shutdown procedure first. The above summary and the following detailed descriptions are all exemplary f, in order to further illustrate the patent application of the present invention. The other purposes and advantages of this issue will be explained in the following descriptions and drawings. [Embodiment] 15 is a circuit block diagram of a power supply device of the present invention having a low voltage bowling system. The power supply 20a supplies a working voltage required for a micro-processing @ship of the ship. - The input voltage vIN is too low, and the -delay time is provided to enable the microprocessor i〇a to complete the shutdown procedure first. The power supply 20a includes: - a power factor correction circuit receives the input voltage 1 (e.g., a bridge-rectified power supply adjustment voltage Vrect), performs power factor correction, and boosts the input voltage VIN. The power factor correction circuit 240a includes a power factor correction controller (not shown) and a power factor correction power circuit (not shown). 1283808 : 10 / ^ 43 IL · ; Control power factor correction power circuit for ====__ 敝升压升压升压动只只只只只只只只只只只只只只只校正校正校正校正校正校正校正校正校正校正校正校正校正校正校正校正校正校正校正The drain valley Q is connected to the turn-off end of the power factor correction circuit 240a, and forms a busbar voltage at two. 5 10 A conversion circuit 250a is connected to the bus Lb, according to the bus voltage νβης, for providing -output 赖ν〇υτ to the microprocessor. A monitoring Yima and the microprocessor 10a _, the system side is equal to the bus voltage such as the fine clerk's electric paste 峨 VpGi), _ woven 峨 micro (4) l 〇 a one power good signal VPG0, the power good news Xu (10) can control the microprocessor to immediately perform a shutdown procedure (such as storing data, etc.). - too low _ _ circuit to connect the machine power due to the correction circuit 麻, after the wheel VIN is lower than the preset protection voltage, after a preset time, will produce an over-voltage protection city SB0, with The boosting action of the power factor correction circuit 2 is stopped. Wherein, when the input voltage vIN is too low, the power factor correction circuit 24 is added to stop the boosting operation, so the bus bar voltage VBUS is gradually attenuated until it is identical to the input voltage ViN. Therefore, it can be confirmed whether or not the input voltage vIN is stable according to the bus bar voltage VBUS. S power supply conversion δίΐϊ虎 Vpgi lower than the monitor 260a set one of the critical signal Vth when the controller 260a is switching the power good signal VPG0 (such as switching from high potential to low potential), so that the micro-processor 10a completes the shutdown first program. In addition, when the bus voltage starts to decrease, the output voltage VOUT of the switching circuit 20a starts to decrease. However, the feedback through the switching circuit 25〇a will immediately pull the duty cycle of the pulse width modulation signal SpwM. Width, to stabilize the wheel ♦ re-V〇ut' because V〇ut and Vbus are related to ...) is replacing page ^2838〇8 ^ουτ V〇

N xD.C. •…⑴ 其中N為轉換電路250a中之變壓器初級與次級繞組之醜比，Dc· 為脈寬調變訊號SpwM之工作週期。因此當匯流減壓VBUS持續下降，脈寬調變峨s_之卫作週期將達到-最大值，此雜》f壓vBUS辆下降，使·_壓v⑽將開始下降(如衫圖A輯示），射該A點可由電職魅之低輪出保護電N xD.C. • (1) where N is the ugly ratio of the primary and secondary windings of the transformer in the conversion circuit 250a, and Dc· is the duty cycle of the pulse width modulation signal SpwM. Therefore, when the bus decompression VBUS continues to decrease, the pulse width modulation 峨 s _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ), shooting the A point can be turned off by the electric enchantment

壓Voflr來毅，而透過低輸出保言蔓電壓v〇ff進行低輪出保護係為習知技術，在此不再贅述。請參考第五圖’為本卿制的監妓健實施電路示意圖。監控器 10 260a係可姐較贿電M所組成。舉例來說監㈣麻可由磁滞比較器332與電晶體334據以實施。射，磁滞比較器332之負端係接收電源轉換訊號I，其正端係接收臨界訊號Vth，因此當電源轉換訊號I小於臨界訊號VTH日夺，電晶體334將導通，所以電源良好訊號％满皮拉為低準位。 15 由於與電源供應器20a耗接的微處理器伽可能有數個，且其執行速度不-，由於微處王里器的執行速度與其完成嶋呈序所需延遲時間相關，在實際的應用上，監控器260a係可由數個遲滯比較器332與電晶體334 來實現，依據本發明’藉由調整電源轉換訊號—與臨界訊號、之比例來設計延遲時間的長短，在不同的時間控制傳送至各微處理器购的電源 2〇良好訊號VPG0,以因應不同微處理器完成關機程序所需之延遲時間。而電源轉換訊號vPGI係透過擷取正比例於匯流排電壓v邮的一個電壓值來實現0 9 1283808 ♦日修卢)正替換頁The pressure of Voflr is good, and the low-round protection by the low-output warning voltage v〇ff is a conventional technique, and will not be described here. Please refer to the fifth figure 'The schematic diagram of the implementation of the control system of the Qing Dynasty. The monitor 10 260a is composed of a sister and a bribe. For example, the monitor (four) hemp can be implemented by the hysteresis comparator 332 and the transistor 334. The negative terminal of the hysteresis comparator 332 receives the power conversion signal I, and the positive terminal receives the critical signal Vth. Therefore, when the power conversion signal I is smaller than the critical signal VTH, the transistor 334 will be turned on, so the power good signal is %. Full Pila is low. 15 Since there may be several microprocessor gammas that are consumed by the power supply 20a, and the execution speed is not -, since the execution speed of the micro-master is related to the delay time required for completing the sequel, in practical applications The monitor 260a can be implemented by a plurality of hysteresis comparators 332 and a transistor 334. According to the present invention, the delay time is designed by adjusting the ratio of the power conversion signal to the threshold signal, and the control is transmitted to the time at different times. Each microprocessor purchases a power supply 2 〇 good signal VPG0 to respond to the delay time required for different microprocessors to complete the shutdown procedure. The power conversion signal vPGI is realized by subtracting a voltage value proportional to the bus voltage v. 0 9 1283808 ♦ 日修卢) replacement page

於預設的臨界訊號νΤΗ時，At the preset critical signal νΤΗ,

vPG0(低準位），通知微處理器10a歧關機程序。另外該轉換電路之一控制訊號SPWM於該匯流排電壓開始往下掉時即開始令其工作週期逐漸加寬’以穩定該輸出電壓νουτ，該控制訊號sPWM的工作週期將於一時間乃因此造成輸擴張到一最大值，然由於該轉換電路250a之輸入持續衰減出電壓V〇ut也開始下降。由第六圖可得知，由電源良好訊號vPGO拉低之時間T1到輸出電壓 ♦ 15 V0UT開始下降之時間丁2之時間差可提供微處理器1〇a完成關機程序的延遲時間Τι。配合第四圖，第七圖係繪示本發明過低電壓保護方法流程圖。此過低電壓保護方法係使用在具有功因校正電路之電源供應器中，係於電源供應器接收的一輪入電壓過低下，用來控制耦接的至少一微處理器先行完成關 20 機程序。該過低電壓保護方法步驟為：首先判斷該電源供應器取得的輸入電壓 VIN是否小於電源供應器預設之保護電壓（步驟210);接著，當輸入電壓 1283808vPG0 (low level), notifies the microprocessor 10a of the shutdown procedure. In addition, one of the conversion circuits controls the signal SPWM to start widening its duty cycle when the bus voltage starts to fall downward to stabilize the output voltage νουτ, and the duty cycle of the control signal sPWM will be caused at a time. The output expands to a maximum value, and since the input of the conversion circuit 250a continues to decay, the voltage V〇ut also begins to decrease. It can be seen from the sixth figure that the time difference from the time T1 when the power good signal vPGO is pulled down to the output voltage ♦ 15 V0UT starts to decrease, and the delay time of the microprocessor 1〇a to complete the shutdown procedure can be provided. With reference to the fourth figure, the seventh figure shows a flow chart of the method for protecting the low voltage of the present invention. The over-voltage protection method is used in a power supply with a power factor correction circuit, and is used to control the coupled at least one microprocessor to complete the shutdown program first when the power supply receives a low turn-on voltage. . The step of the over-voltage protection method is: first determining whether the input voltage VIN obtained by the power supply is less than a preset protection voltage of the power supply (step 210); then, when the input voltage is 1283808

VlN小於保護電壓後，經過一個預設時間，產生一過低電壓保護訊號sB0。接著，停止功因校正電路之昇壓動作，以使一匯流排電壓Vbus開始下降（步驟220)。接著，判斷一等比例於匯流排電壓％仍之電源轉換訊號After VlN is less than the protection voltage, an over-voltage protection signal sB0 is generated after a predetermined time. Next, the boosting action of the power factor correction circuit is stopped to cause a busbar voltage Vbus to begin to drop (step 220). Next, determine the power conversion signal that is equal to the busbar voltage %.

VpGI疋否小於預設的臨界訊號Vth來確認輸入電壓ViN是否過低（步驟 5 230) 〇接著，當該等比例於匯流排電壓Vbus2電源轉換訊號VpGi小於預設的臨界訊號VTH時，切換一電源良好訊號（步驟24〇)當電源良好訊號切換時，微處理器將先行完成關機程序，其中當設定的臨界訊號VTH有數個時’將依序截止各電源良好訊號VpG〇給相應耦接的各微處理器進行關機程 10 序。於前述步驟流程中，在步驟21〇的判斷中若輸入電壓ViN不小於保護電壓時’將重新進行確認步驟。步驟23〇的判斷中當電源轉換訊號I 未小於預设的界訊號νΤΗ時，也將重複做確認判斷的動作。本發明之具過低電魏m的電祕魅及過低電壓彳練方法，係 b可在具有功因校正電路之電源供應器處於過低輸人電壓供應時，藉由適時地控制電敎聽號，碰處理器在電驗顧的輸出龍前，先行元成關機私序，以防止資料於過低輸入電壓下產生遺漏現象。以上所述，僅為本發明最佳之一的具體實施例之詳細說明與圖式，惟 2〇本發明之特徵並不侷限於此，並非用以限制本發明，本發明之所有範圍應以下述之帽專觀圍鱗，凡合於本發”請專鄕社精神與其類似變化之實補，皆聽含於本發.範射，任域悉該項技藝者在本發 1283808 ’年.一 Η曰修(走)正替換頁明之領域内，可輕易思及之變化或修飾皆可涵蓋在以下本案之專利範圍。Whether VpGI is less than the preset critical signal Vth to confirm whether the input voltage ViN is too low (step 5 230). Next, when the ratio of the busbar voltage Vbus2 power conversion signal VpGi is less than the preset critical signal VTH, switch one Power good signal (step 24〇) When the power good signal is switched, the microprocessor will complete the shutdown procedure first. When there are several threshold signals VTH set, the power supply good signal VpG〇 will be sequentially connected to the corresponding coupling. Each microprocessor performs a shutdown sequence. In the foregoing step flow, if the input voltage ViN is not less than the protection voltage in the judgment of step 21A, the confirmation step will be performed again. In the judgment of step 23〇, when the power conversion signal I is not less than the preset boundary signal νΤΗ, the confirmation judgment is repeated. The invention relates to an electric secret and a low voltage training method with low electric power, which can control the electric power in time when the power supply with the power correction circuit is in a low input voltage supply. Listening number, before the processor in the output of the electric inspection, the first step is to shut down the private sequence to prevent the data from missing under the input voltage. The above is only a detailed description of the specific embodiments of the present invention, and is not intended to limit the scope of the present invention. The caps are dedicated to the scales, and all of them are in this hair. Please ask the spirit of the club and its similar changes. All of them are included in this hair. Fan shot, Ren Yuzhi is the artist in this issue of 1283808 'year. A repair (walking) is in the field of replacing the page, and the changes or modifications that can be easily considered can be covered in the patent scope of the following case.

1010

15 12 20 128380815 12 20 1283808

1010

【圖式簡單說明】第-圖為習知包含功因校正電路之電源供應器的電路示意圖；第二圖為習知包含功因校正電路的電源供應器進行過低電壓保護之時序圖；第三圖為習知包含功陳正電路的電源供應器之過低f壓保護方法之方法流程圖；第四圖為本發明具過低電壓保護系統之電源供應器的電路方塊示音圖第五圖為本發明提出的監控器較佳實施電路示意圖；第六圖為本發明進行過低電壓保護之時序圖；及弟七圖為本發明過低電壓保護方法之方法流程圖。【主要元件符號說明】BRIEF DESCRIPTION OF THE DRAWINGS The first figure is a circuit diagram of a conventional power supply including a power factor correction circuit; the second figure is a timing diagram of a conventional power supply including a power factor correction circuit for low voltage protection; The three figures are flow chart of the method for the low-f voltage protection method of the power supply including the power Chen Chen circuit; the fourth figure is the circuit block diagram fifth of the power supply device with the low voltage protection system of the present invention. The figure is a schematic diagram of a preferred implementation circuit of the monitor proposed by the present invention; the sixth diagram is a timing diagram of the low voltage protection of the present invention; and the seventh diagram is a flow chart of the method for the over-voltage protection method of the present invention. [Main component symbol description]

微處理器10 電源供應器20 過低電壓偵測電路220 待機電路230 功因校正電路240 轉換電路250 監控器260 電源供應器20a 微處理器10a 監控器260a 功因校正電路240a 轉換電路250a 過低電壓偵測電路220a 電晶體334 磁滯比較器332 輸出電壓V〇UT 臨界訊號Vjh 匯流排電容CB 電源轉換訊號VPC5I 輸入電壓VIN 13 1283808 匯流排電壓vBUS 脈波調變訊號SpwM 過低電壓保護訊號Sb〇 %月"曰修替換頁Microprocessor 10 power supply 20 low voltage detection circuit 220 standby circuit 230 power factor correction circuit 240 conversion circuit 250 monitor 260 power supply 20a microprocessor 10a monitor 260a power factor correction circuit 240a conversion circuit 250a too low Voltage detection circuit 220a transistor 334 hysteresis comparator 332 output voltage V〇UT critical signal Vjh bus bar capacitor CB power conversion signal VPC5I input voltage VIN 13 1283808 bus voltage vBUS pulse modulation signal SpwM low voltage protection signal Sb 〇%月"曰修换页

昇壓控制訊號SpFC 電源良好訊號VpGO 電源調整電壓VrecT 步驟110 判斷輸入電壓是否小於保護電壓步驟120 產生低電壓保護訊號步驟130 截止工作電源步驟210 確認輸入電壓小於保護電壓步驟220 截止升壓動作步驟230 判斷輸入電壓是否過低步驟240 控制電源良好訊號Step-up control signal SpFC Power good signal VpGO Power adjustment voltage VrecT Step 110 Determine whether the input voltage is less than the protection voltage Step 120 Generate a low voltage protection signal Step 130 Cut off the power supply Step 210 Confirm that the input voltage is less than the protection voltage Step 220 Cut-off boosting action step 230 Determine if the input voltage is too low. Step 240 Control the power good signal.

14 1014 10

Claims

4 4 領讀委員明示张第，隹白所提之修正H藤超出原說明書或圖式.所褐露之範園月_曰修(¥正替換] 一 _ Μ·1··------一h n_-·，___1 mimL ' 十、申請專利範圍： =1具過低電壓保護系統的電源供應器，用以提供至少—微處理器所。之工作賴’亚於輸人電源電壓過低下，控綱微處職先行完成關機程序，包括有：力口枚正電路’接收一輸入電壓，並進行功因校正及昇壓動作； “-匯流排電容，連接於該功因校正電路的輸出端，並根據該功因校電路輪出之該輸入電壓於兩端形成一匯流排電壓V贴； —轉換電路，連接於親輯電容，係根據麵流排賴，用以提供一輪出電壓到該些微處理器； 10 揽控器，連接至该些微處理器，係偵測一等比例之匯流排電壓，用以控制輸出至少一電源良好訊號到該些微處理器；及一過低電壓侧電路，連接於該功因校正電路與該輸人電壓之間，當該輸入_過钉，輸出—過低賴賴訊號—；八中4功因权正電路接收到該過低電壓保護訊號，即停止昇廢 I5工作’當该監控器判斷該等比例之匯流排電壓低於該監控器設定之一臨界訊號時，即控制一電源良好訊號使該些微處理器先行完成關機程序。 2·如申請專利顧第丨項所述之電源供應器，其中該監控器係由—比較器連接一^電晶體組成。 3·如申請專利範圍第2項所述之電源供應器，其中該比較器係為一磁滯比較 20 器。 4·-種過低韻倾方法，其使用在具有功因校正電路之—電源供應器中，於該電源供應器接收的一輸入電壓過低下，用以控制至少一微處理器 154 4 The reading committee member clearly stated that Zhang Di, the amendment proposed by Yu Bai was beyond the original manual or the schema. The Fan Lu of the brown dew _ 曰 repair (¥正换) _ Μ·1··---- --H n_-·,___1 mimL ' X. Patent application scope: =1 Power supply with low voltage protection system to provide at least the microprocessor. The work depends on the input power voltage. Too low, the control micro-department first completes the shutdown procedure, including: The force port positive circuit 'receives an input voltage, and performs power factor correction and boosting action; '--busbar capacitor is connected to the power factor correction circuit The output end, and according to the input voltage of the power circuit, a bus bar voltage V is formed at both ends; a conversion circuit is connected to the capacitor, which is arranged according to the surface flow to provide a round out Voltage to the microprocessors; 10 controllers connected to the microprocessors to detect a proportional bus voltage for controlling at least one power good signal to the microprocessors; and a low voltage a side circuit connected to the power factor correction circuit and Between the input voltage, when the input _ over nail, the output - too low depends on the signal -; the eight-in-four power factor positive circuit receives the over-voltage protection signal, that is, stop the lift I5 work 'When the monitor When it is determined that the bus voltage of the ratio is lower than a threshold signal set by the monitor, controlling a power good signal causes the microprocessors to complete the shutdown procedure first. 2. The power supply as described in the patent application The monitor is composed of a comparator connected to a transistor. 3. The power supply according to claim 2, wherein the comparator is a hysteresis comparator 20. 4·- a low-pitch method for use in a power supply having a power factor correction circuit for controlling at least one microprocessor 15 when an input voltage received by the power supply is too low

Τ~~Ί 曰修(0正替換頁 1283808 先行元成處理程序，包括有下列步驟：確認該輸入電壓是否小於預設之一保護電壓；停止該電源供應器中之昇壓動作；判斷該輸入電壓是否過低；及 5 控m良瓶號，使該錄處萄先行完成關機程序。 5.如申請專概ffi第4項魏之過低魏紐方法，其巾觸職入電壓是否過低之步驟，係透過該電源供應器之一監控器。 • 6.如申請專利範圍第4項所述之過低電壓保護方法，其中控制該電源良好訊號使該些微處理器先行完成關機程序之步驟，係透過該電源供應器之一 & 10控器來控制。 7·如申請專利範圍第4項所述之過低電壓保護方法，其中判斷該輪入電壓是否小於預設之一保護電壓，以及停止電源供應器之昇壓動作之步驟，透過一過低電壓偵測電路來控制。、 15Τ~~Ί 曰修 (0 is replacing page 1283808. The first step is processing, including the following steps: confirm whether the input voltage is less than a preset protection voltage; stop the boosting action in the power supply; determine the input Whether the voltage is too low; and 5 control m bottle number, so that the record is completed first to complete the shutdown process. 5. If you apply for the special ffi item 4 Wei Zhi too low Wei New method, the towel touch voltage is too low The step of passing through the monitor of the power supply. 6. The method of protecting the power supply from the low voltage protection method according to claim 4, wherein the step of controlling the power good signal causes the microprocessor to complete the shutdown procedure first. The method is controlled by one of the power supply & 10 controllers. 7. The method of claim 5, wherein the wheel-in voltage is less than a preset protection voltage, And the step of stopping the boosting action of the power supply is controlled by a low voltage detection circuit.

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