201005459 九、發明說明： 【發明所屬之技術領域】 一種升壓緩衝電路架構，是—種應用於電源供應器中的升壓電 路’用以控制該升壓電路調變輪入電力的週期。 【先前技術】201005459 IX. Description of the Invention: [Technical Field of the Invention] A boost snubber circuit architecture is a type of boost circuit used in a power supply to control the period during which the boost circuit modulates the incoming power. [Prior Art]
。如圖1所示，大部份電源供應器（包括AC/DC或DC/DC之轉換 器）皆包含-整流單元1、-升壓電路2 (包含習知之功因校正單元 亦，有升壓之作用）以及-切換式之電力轉換單元3，一輸入電力通 過该整流單元1後，再經由該升壓電路2 (同上，亦包含習知之功因 校正單元）調變該輸人電力之電_達—預設之練位準，之後經由 該電力轉換單元3將升職之輸入電力轉換為一輸出電力，其中該升 廢電路2包含-升壓單元21、-開關元件22以及一升屋控制單元 23 ’該升壓控制單το 23產生-驅動訊號控制該開關元件a的導通或 截止，而該開關元件22的導通或截止決定升壓單元21之充電與放電 的週期，該升壓控制單元23調整該驅動訊號之空佔比（崎她）， 亦即控制該驅動訊號之導_距以調整該開關元件22之導通時間， 進-步控儀升壓單元21之電壓而_職輸人電力調變升壓之目 的；該電力轉換單元3在剛取得該輸入電力後，為了盡快進入可啟動 工作的狀況’該龍電路2之升壓㈣單元23會在同-職中將該 驅動訊號的導通時距調到最大，令該越單元21在最快的時間㈣ 塵到-航之電壓位準（以-般的電源供應器為例，習知的升壓電路 =升制3,以上），如圖2中所示，由於該雜電路2藉由不 斷兩頻的切換錢浙壓·之效果，其工作伽驗技術領域具一 般知識者所熟知’無該升㈣路2在升壓的週射產生高頻且 的驅動訊號，因此該圖所示之波形僅為代表—輪人電力％上 驅動訊號92時距改義示_，圖2上半部所齡為該輸入電力％ 之電壓波形’起初該輸人電力91之電壓與—升壓位準9 距’因而該升壓控制單元23產生之驅動訊號92起初即為最大之^通 時距寬度’以調變該輸人電力在最短的時_升壓至該位準，使 5 201005459 - 該電源供應器進入待機狀態或工作狀態，直到該輸入電力91之電壓 - 前該升壓辦93触鶴減92的導鱗距指絲正常狀態； 然而，當該升壓控制單元23以最大的導通時距驅動該升壓單元21充 電時’該升壓單元21將產生很大之突衝電流（i_h current)，此現 象將傷害電路元件’若非使㈣練高之元件則料造成電路故障， 但耐壓較南之元件成本較高，體積亦較大，不符合電子產品平價化與 小型化之趨勢，因而該升壓電路2於升壓時產生突衝電流之問題亟待 解決。 【發明内容】 籲 有鑑於上述之習知缺失，本發明之目的即在於提供-種抑制突衝 電流（inrush current)的升壓電路架構，使電源供應器在取得一輸入 電力後，該升壓電路提高電壓之週期中抑制突衝電流的產生。 本發明為一種升壓緩衝電路架構，係用於具有一升壓電路以及一 電力轉換單元之電源供應器，該升壓電路取得—輸人電力敝始一升 壓週期’該升壓週期中，該升壓電路將該輸入電力升壓到達一升壓位 準，而後送至該電力轉換單元以產生一輸出電力，而該升壓電路包括 一升壓單元、一升壓控制單元以及一升壓缓衝單元，其中該升壓單元 具有至少-儲能元件’並取得該輸入電力，且該升鮮元連接一開關 ® 70件’該升壓控制單元產生一驅動訊號以驅動該開關元件導通，進而 控制該，單元之充放電，並藉—參考與__細城比較之電愿 差而決定該驅動訊號輸出之時距，而其中該升壓緩衝單元則自該升壓 單元取得該參考電壓與該偵測訊號的電壓差，並調變該參考電壓或該 谓測訊號之大小以決定該侧訊號與該升壓位準之電壓差，進而控制 該驅動訊號輸出之時距；藉由上述電路架構，透過控制侧訊號與該 升壓位準之電堡差，即可避免該制訊號與該升壓位準的電壓差過 大’進-步避免該升壓控制電路產生過大的駆動訊號時距而產生突衝 電流’藉此改善習知升壓電路於升壓週射產生突衝電流之缺失。 【實施方式】 清參閱圖3 ’圖3所示為本發明之電路架構圖，本發明係應用於 6 201005459 具有:升壓電路2以及-電力轉換單元3之電源供應器，其中該電源 供應器係取得—輸人電力，該輸人電力透過-整流單元1後送至該升 壓電路2，該升壓電路2取得一輸入電力後則啟始一升壓週期，該升 壓週期之期職升壓電路2將該輸人電力升_丨達—升壓位準（一般 為380V至400V) ’使該電源供應器進入正常工作或待機狀態，該升 Μ2 jjf力之電壓提升後’才可供後端的電力轉換單元3 接收該到達升壓辦之輸人電力哺換為—輸丨電力；其巾該升壓電 路2包括一升壓單元21、一開關元件22、一升壓控制單元23以及一 升壓緩衝單元25 ’其巾該升壓單元21具有至少-雛元件，並取得 該輸入電力’且該升壓單元^連接__開關元件22 ’而該升壓控制單 元23則產生一驅動訊號驅動該開關元件22切換該輸入電力通過該升 壓單元21之週期而令該升壓單元21儲能升壓，而該升壓控制單元23 係藉一參考電壓（D蚊該升脉準，以及藉-侧訊號（Vfb) 與該參考電壓比較之電壓差而決定該驅動訊號輸出之時距，且該驅動 訊號輸出的時距與該參考電壓及該偵測訊號的電壓差成正比，其中該 參考電壓係連接一參考電壓源24取得，該偵測訊號則自該升壓單元 21取得；其中特別值得注意的是，當該參考電壓與該偵測訊號之差異 愈大時所產生之驅動訊號時距愈大，愈容易產生突衝電流，為抑制突 衝電力的產生，該升壓電路2更包括一升壓緩衝單元25，該升壓緩衝 單元25自該升壓單元21取得該參考電壓與該偵測訊號，並加入一調 變能量調變該參考電壓或該彳貞測訊號之大小，以決定該谓測訊號與該 參考電壓之電壓差，進而控制該驅動訊號輸出之時距；當該升麼電路 2取得該輸入電力時，該升壓緩衝單元25得調變該參考電壓或該伯測 訊號之大小而縮小兩者之電壓差，並令該偵測訊號與該升壓位準之電 壓差具有一壓差上限值，且對應的調整加入該參考電壓或偵測訊號之 調變能量’以符合偵測訊號與該升壓位準之電壓差具有壓差上限值之 要求，該參考電力與該偵測訊號之電壓差可在該壓差上限值以下浮 動，而該參考電力與該偵測訊號之電壓差到達該壓差上限值時，該升 壓緩衝單元25得增減該調變能量以降低該參考電力與該偵測訊號之 7 201005459 電壓差，如此可將驅動訊號時距可控制在一定範圍之内，進而抑制突 衝電流之產生，上述之調變動作中該參考電壓調變之上限值為該升^ 位準，以避免該輸入電力之電壓不斷上升超過該升壓位準；再者，該 升壓緩衝單元25亦可調變該參考電壓或該偵測訊號之大小，令該偵 測訊號與該參考訊號具有固定之電壓差，因而將使該升壓控制單元 產生具有固定時距的驅動訊號，同樣的，該參考電壓調變之上限值為 亥升虔位準，以避免a亥輸入電力之電壓不斷上升超過該升壓位準。. As shown in Figure 1, most power supplies (including AC/DC or DC/DC converters) include - rectifier unit 1, - boost circuit 2 (including the known power factor correction unit, there is boost And the switching power conversion unit 3, after an input power passes through the rectifying unit 1, and then modulates the electric power of the input power via the boosting circuit 2 (i.e., also includes a conventional power factor correcting unit) _达—predetermined practice level, after which the input power of the promotion is converted into an output power via the power conversion unit 3, wherein the ups and down circuit 2 includes a -up unit 21, a switching element 22, and a liter control The boosting control unit το 23 generates a driving signal to control the turning on or off of the switching element a, and the turning on or off of the switching element 22 determines a period of charging and discharging of the boosting unit 21, the boosting control unit 23 adjusting the ratio of the driving signal to the air-to-mass ratio, that is, controlling the driving signal to adjust the conduction time of the switching element 22, and the voltage of the step-in controller step-up unit 21 The purpose of power modulation and boosting; the power After the input unit 3 has just obtained the input power, in order to enter the start-up operation as soon as possible, the boosting (four) unit 23 of the dragon circuit 2 will adjust the conduction time of the driving signal to the maximum in the same position, so that The unit 21 is at the fastest time (4) dust-to-air voltage level (for example, a general power supply, conventional boost circuit = boost 3, above), as shown in Figure 2, due to The hybrid circuit 2 has the effect of switching between two frequencies, and the work of the gamma technique is well known to those skilled in the art. No such rise (four) way 2 generates high frequency and drive signals in the boosted shot. Therefore, the waveform shown in the figure is only representative - the wheel power power % drive signal 92 time interval correction _, the upper half of Fig. 2 is the voltage waveform of the input power % 'initially the input power 91 The voltage and the boost level are 9 distances, and thus the driving signal 92 generated by the boosting control unit 23 is initially the maximum time interval width 'to adjust the input power to the shortest time_boost to the bit Quasi, make 5 201005459 - the power supply goes into standby or working state until the input The voltage of the power source 91 - before the boosting device 93 touches the crane to reduce the scale of the scale from the finger to the normal state; however, when the boost control unit 23 drives the boosting unit 21 to charge at the maximum conduction time, the rise The pressing unit 21 will generate a large surge current (i_h current), which will damage the circuit component. If the component is not high (4), the circuit is faulty, but the voltage is higher than the south component, and the volume is higher. Large, does not meet the trend of electronic product parity and miniaturization, so the problem of the surge current generated by the booster circuit 2 during boosting needs to be solved. SUMMARY OF THE INVENTION In view of the above-mentioned conventional deficiencies, the object of the present invention is to provide a boost circuit structure for suppressing an inrush current, which enables the power supply to obtain an input power. The generation of the surge current is suppressed in the period in which the circuit increases the voltage. The present invention is a boost snubber circuit architecture for a power supply having a booster circuit and a power conversion unit, the booster circuit obtaining - inputting power to initiate a boosting period ' during the boosting period, The boosting circuit boosts the input power to a boosting level and then sends the power to the power converting unit to generate an output power, and the boosting circuit includes a boosting unit, a boosting control unit, and a boosting unit. a buffer unit, wherein the boosting unit has at least an energy storage element ′ and obtains the input power, and the boost unit is connected to a switch® 70 pieces. The boost control unit generates a driving signal to drive the switching element to be turned on. Further controlling the charging and discharging of the unit, and determining the time interval of the driving signal output by referring to the electrical wish ratio compared with the __fine city, wherein the boosting buffer unit obtains the reference voltage from the boosting unit And a voltage difference between the detection signal and the magnitude of the reference signal to determine a voltage difference between the side signal and the boost level, thereby controlling a time interval of the driving signal output With the above circuit structure, the voltage difference between the control signal and the boosting level can be prevented from being excessively large by the control side signal and the boosting level of the boosting level, and the step-up control circuit is prevented from being excessively large. The spurt signal generates a rush current at a time interval, thereby improving the lack of a surge current generated by the conventional boost circuit in the boosting cycle. [Embodiment] Referring to FIG. 3, FIG. 3 is a circuit architecture diagram of the present invention, and the present invention is applied to 6 201005459: a power supply device having a booster circuit 2 and a power conversion unit 3, wherein the power supply device Obtaining and inputting power, the input power is transmitted to the booster circuit 2 through the rectifying unit 1, and the boosting circuit 2 starts an boosting cycle after the input of the input power, and the boosting cycle is started. The boosting circuit 2 raises the input power to the power-up level (generally 380V to 400V) to make the power supply enter the normal working or standby state, and the voltage of the boosting 2 jjf force is increased. The power conversion unit 3 for the back end receives the input power of the arrival boosting device and feeds the power to the power supply. The boosting circuit 2 includes a boosting unit 21, a switching element 22, and a boosting control unit 23. And a boost buffer unit 25', the boosting unit 21 has at least a young component, and the input power is obtained, and the boosting unit is connected to the __switching element 22', and the boosting control unit 23 generates a Driving signal drives the switching element 22 to switch The input power passes through the period of the boosting unit 21 to cause the boosting unit 21 to store and boost, and the boosting control unit 23 borrows a reference voltage (D mosquito and the side signal (Vfb) Comparing the voltage difference with the reference voltage to determine the time interval of the driving signal output, and the time interval of the driving signal output is proportional to the voltage difference between the reference voltage and the detecting signal, wherein the reference voltage is connected to a reference voltage The source 24 is obtained, and the detection signal is obtained from the boosting unit 21; wherein it is particularly noteworthy that the greater the difference between the reference voltage and the detection signal, the larger the driving signal is generated, and the easier it is. The boosting circuit 2 further includes a boosting buffer unit 25, and the boosting buffer unit 25 obtains the reference voltage and the detecting signal from the boosting unit 21, and generates a surge current. Adding a modulation energy to adjust the reference voltage or the size of the signal to determine the voltage difference between the reference signal and the reference voltage, thereby controlling the time interval of the driving signal output; when the circuit 2 is obtained When the power is input, the boost buffer unit 25 adjusts the voltage of the reference voltage or the primary signal to reduce the voltage difference between the two, and makes the voltage difference between the detection signal and the boost level have a pressure difference. The upper limit value, and the corresponding adjustment is added to the reference voltage or the modulation energy of the detection signal to meet the voltage difference difference between the detection signal and the boost level, and the reference power and the detection The voltage difference of the test signal may float below the upper limit of the differential pressure, and when the voltage difference between the reference power and the detection signal reaches the upper limit of the differential pressure, the boost buffer unit 25 may increase or decrease the modulation energy. In order to reduce the voltage difference between the reference power and the detection signal 7 201005459, the driving signal time interval can be controlled within a certain range, thereby suppressing the generation of the kick current, and the reference voltage modulation in the above modulation operation The upper limit value is the level of the rise to prevent the voltage of the input power from rising continuously beyond the boost level; in addition, the boost buffer unit 25 can also modulate the reference voltage or the size of the detection signal. To make the detection signal and The reference signal has a fixed voltage difference, so that the boost control unit generates a driving signal with a fixed time interval. Similarly, the upper limit of the reference voltage modulation is a rising level to avoid a black input. The voltage of the power continuously rises above the boost level.
上述電路架構所產生之波形示意圖請參閱圖4,由於該升壓電路 2藉由不斷高頻的切換而達到升壓調變之效果’其工作原理為該技術 領域具一般知識者所熟知，然而該升壓電路2在升壓的週期中產生高 頻且大量的驅動訊號，因此該圖所示之波形僅為代表該輸入電力= 上升與該驅動訊號82時距改變的示意圖，與實際量測波形有所差 異，先行敘明；如圖中所示，其中可見該輸入電力81在升壓至該升 壓位準時’目断馳鮮;23控綱伽職與該參考訊號的電 壓差，使該驅動訊號82時距是逐步擴大的，並且該升壓控制單元23 可設定在升壓週期中該偵測訊號與該參考訊號的電壓差具有一壓差上 限值，以關該輸人電力81上狀速度，藉此抑做衝電流的產 生’直到該輸入電力81到達該升壓位準後才解決其限制。 上述的電路架構中，升壓控制單元23可透過不同的實施方式達 到限制該偵測訊號與該參考訊號電壓差的目的；該升壓緩衝單元乃 可利用-充放電迴路’該充放電迴路中具有至少__儲能元件，該餘能 凡件接收該參考電麵細訊驗將產生-反f勢做為該調變能量， ^中該儲能元件產生反電勢之絲為職術領財具有—般知識著所 ^知，故不再贅述，因而藉由該儲能元件所形成的調變能量調變該參 考電壓或該細訊號為雜性鱗上升之祕，以抑倾細訊號與 該參考電壓於断壓週射之電壓差；另—種實施之方式亦可利用差 動放大與補7之方式，該升壓緩衝單元Μ可侧至少—比較器以及 該比較器控制之電壓源，透過該比較關斷該細訊號與該參考 訊號的電壓差’簡由該比較H之輸出而令該電壓源提供-電力作為 8 201005459 該調變能量補償偵測訊號與該參考訊號的電壓差；如上所述，該升壓 緩衝單元25的實施方式應為該技術領域具一般知識者所可理解的， 故本發明並不限定該升壓緩衝單元25之實施電路。 雖然本發明以較佳實施例揭露如上，然其並非用以限定本發明， 任何Μ此聽者，在賴縣_之精神和範_，而所作之些許 更，與_ ’魏涵胁本發财，本發敗保護 : 之申請專舰_狀者騎。 d傻附 綜上所述，本發明較習知之創作增進上述功效，Please refer to FIG. 4 for the waveform diagram generated by the above circuit architecture. Since the booster circuit 2 achieves the effect of boost modulation by continuous high frequency switching, the working principle is well known to those skilled in the art. The boosting circuit 2 generates a high frequency and a large number of driving signals during the boosting period. Therefore, the waveform shown in the figure is only a schematic diagram representing the change of the input power = rising and the driving signal 82, and actual measurement. The waveforms are different, and are first described; as shown in the figure, it can be seen that the input power 81 is 'suddenly rushed when boosting to the boosting level; 23 the voltage difference between the control unit and the reference signal makes The driving signal 82 is gradually enlarged, and the boosting control unit 23 can set a voltage difference upper limit value between the detection signal and the reference signal in the boosting period to turn off the input power. The upper speed is 81, thereby suppressing the generation of the rush current until the input power 81 reaches the boost level. In the above circuit structure, the boost control unit 23 can achieve the purpose of limiting the voltage difference between the detection signal and the reference signal through different implementation manners; the boost buffer unit can utilize a charge-discharge circuit in the charge-discharge loop Having at least __ energy storage component, the residual energy receiving the reference electrical surface fine test will generate - anti-f potential as the modulation energy, ^ the energy storage component generates anti-potential wire for the job It has a general knowledge of the knowledge, so it will not be described again. Therefore, the reference voltage or the fine signal is modulated by the modulation energy formed by the energy storage element to prevent the impurity signal from rising. The voltage difference between the reference voltage and the breakdown voltage is another differential manner. The boosting buffer unit can be at least a comparator and a voltage source controlled by the comparator. The voltage difference between the fine signal and the reference signal is turned off by the comparison, and the voltage source is provided by the output of the comparison H. The power is used as 8 201005459. The voltage difference between the modulated energy compensation detection signal and the reference signal As mentioned above, The implementation of the boost buffer unit 25 should be understood by those skilled in the art, and the present invention does not limit the implementation of the boost buffer unit 25. Although the present invention has been disclosed above in the preferred embodiments, it is not intended to limit the present invention, and any of the listeners, in the spirit and scope of Lai County, made some of the more, and _ 'Weihan threatened the fortune , the defeat of the protection: the application of the special ship _ shape ride. d silly attachment In summary, the present invention enhances the above effects by more conventional creations.
Z及進步性之歧創新專利要件，爰依法提出中‘二:新 准本件發明專利申請案，以勵創作，至感德便。 L口凊貝局核 201005459 【圖式簡單說明】 圖1為習知升壓電路之電路架構圖。 圖2為習知輸入電力與驅動訊號的波形示意圖。 圖3為本發明之電路架構圖。 圖4為本發明之輸入電力與驅動訊號的波形示意圖。 【主要元件符號說明】 1 .... •·.整流單元 2 .... • ••升壓電路 21 · · · · • ••升壓單元 22 · · · · •..開關元件 23 · · · · •升壓控制單元 24 .... ...參考電壓源 25 · · · · ...升壓緩衝單元 3 .... .· ·電力轉換單元 81 ' 91 · · .·.輸入電力 82、92 · · •.·驅動訊號 83、93 · · •..升壓位準Z and the progressive differences in patent requirements, 爰 提出 提出 ‘ 二 二 二 二 ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ ‘ L port mussel core 201005459 [Simple diagram of the diagram] Figure 1 is a circuit diagram of a conventional boost circuit. 2 is a schematic diagram of waveforms of conventional input power and driving signals. 3 is a circuit diagram of the present invention. 4 is a waveform diagram of input power and driving signals according to the present invention. [Explanation of main component symbols] 1 .... •·. Rectifier unit 2 .... • •• Boost circuit 21 · · · · • • • Boost unit 22 · · · · • • Switching element 23 · · · · • Boost control unit 24 .... ... reference voltage source 25 · · · · ... boost buffer unit 3 ..... · Power conversion unit 81 ' 91 · · .. Input power 82, 92 · · •.· drive signal 83, 93 · · •.. boost level