200941905 九、發明說明： 【發明所屬之技術領域】 本發明係關於切換式f _換||，狀其係_切換式電源 轉換器之切換信號頻率控制。 【先前技術】 〇 人們對於>肖費性電子產品在體積、重量與電力消耗上的要求 越來越嚴苛，這也使得體積小、重量輕、轉換效率高_換式電 源轉換器比起線性整流器更為受歡迎。第丨圖係f知切換式電源 轉換器的示意圖。切換式電源轉換n卿包含開關sw、儲能電感 L。、二極體D、穩壓電紅與切換信號產生器11()。切換信號產生 器11〇比較負載&的跨壓V2與一參考電壓I以產生一切換信號 控制開關SW的導通或關閉，當開關sw導通時，二極體d關閉， 第一電源％對航賊L充電’即儲能電感L儲存第—電源之能 量，另一方面’當開關SW關閉日寺，儲存在儲能電感£上之電流 U吏二極體D導通，並以第二電源％之形式對穩壓電容C與負載 L供電帛電源v〗與第二電源％之比例會與開關sw導通時 Z與關_找例錢，_城信號之工作(场論） 7 ’假設第—電源V1為源，當負载&固定而切換信 與第二電源V2之比例關係 以’則第二絲V2為—定值’然而在實際應用上，負載Rl 時改變’當負載&改變為一較大的負载而消耗較多能量 ’’第-電之電舰可能也隨之賴，為了使第二電源％ 200941905 維持在一定值’切換信號產生電路U〇依據參考電壓與第二電 源V2改變切換信號之工作週期，以使更多能量得自第一電源％ 傳遞至負載RL，而讓第二電源得維持在一定值。這樣的切換信號 產生方式即為習知的脈波寬度調變(pulse width modulation)方式。 然而，當負載RL變為一較小的負載而消耗較少能量時，切換 城產生電路110亦隨著降低切換信號的脈波寬度，以使較少的 ❹说置自第-電源V,傳遞至負載Rl，然而切換信號產生電路11〇 能夠產生的最窄脈波寬度仍有一定限制，當切換信號產生電路训 已經提供其最窄脈波寬度之切換信號時，仍會使得過多能量傳遞 至負載RL ’此時切換信號產生電路將增加每個脈波間的間距(降低 切換信號之頻率），即變成以習知的脈波頻率調變㈣sefrequency modulahon)方式產生切換信號，以求更進一步地降低傳遞至負載 Rl之能量’使第二電源％得維持在—定值。 、 ❹ ==波頻率調變方式產生的切換信號可能隨著第二電源 2,負載RL ’而成為影響負載運作之電源雜訊，例 = = 換信號之頻Μ2·—間時二 ^=者有可能會聽到源自該切換信號之切換雜訊 【發明内容】 為避免上述問題，本發明的 y 、之—係提供一種藉由控制輸 200941905 入儲能几件之電流大小，以避免切換信號落入某特定頻率之切換 式電源轉換器與其操作方法。 、 依據本發明之一實施例，其提供一種切換式電源轉換器。該 切換式電源轉換器係依據一切換信號將一第一電源轉換為一第二 電源，其包含一儲能元件與一電流控制器。該儲能元件儲存該第 —電源之一能量並以該第二電源之形式釋放該能量；以及該電流 〇控制ϋ麵性連接於該雛元件，而用以依據該切換信號選擇性 地使該第-電_接至該職元件，以及依據該切換信號之一切 換頻率來調整自該第一電源輸入該儲能元件之一電流值。 依據本發明之-實施例，其提供一種操作上述切換式電源轉 換器之方法。該方法包含利用一儲能元件儲存該第一電源之一能 量並以該第二電源之形式釋放該能量；依據該切換信號選擇性地 ◎使該第-電源搞接至該儲能元件；以及依據該切換信號之一切換 頻率來調整自該第-電源輸人該儲能耕之—電流值。 【實施方式】 第2圖係依據本發明之—實關之切換式電轉換器的示意 圖。切換式電源轉換器200包含電流控制器22〇、儲能電感l、: 極體D、穩壓電容C與切換信號產生器彻。請注細，為求簡 潔’第2圖中僅顯示與本發明有關之電路元件。此外，第2圖所 不之切換式電轉魅的電路結構僅作為範舰明之用，不應將 200941905 本發明侷限於此電路結構，熟悉此項技藝者當可在本發明之教導 之下將儲能電感置換為其他儲能元件(例如儲能電容），或者結合降 壓式轉換器(buck converter)、昇壓式轉換器(boost converter)、返驰 式轉換器(flyback C0nverter)等各種習知切換式直流電源轉換器而 設計出各種切換式電源轉換器，上述各種變化型亦屬於本發明之 範,之内。 Ο 第3圖係依據本發明之一實施例之操作一切換式電源轉換器 的方法流程圖。操作一切換式電源轉換器之方法包含複數個步 驟’分列於下： ，领310.利用一儲成元件儲存第一電源之一能量並以第二電源之 形式釋放該能量。 步驛320 ··依據切換信號選擇性地使該第一電源耦接至該儲能元 Q 件。 步騍330:依據該切換信號之一切換頻率來調整自該第一電源輸入 該儲能元件之一電流值。 —假若可達成實質上相同的結果’上述方法的各步驟不 一定要依所示的次序執行，且不需連續，亦即，可以插入 其他步驟’或可交換、省略上述之任何步驟。上述步驟（亦200941905 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a switching type f_chang||, which is a switching signal frequency control of a switching type power converter. [Prior Art] The demand for volume, weight and power consumption of 肖 费 性 电子 电子 电子 越来越 越来越 越来越 越来越 越来越 越来越 越来越 越来越 越来越 越来越 越来越 越来越 越来越 越来越 肖 肖 肖 肖 肖 肖 肖 肖 肖 肖 肖 肖 肖 肖 肖 肖 肖 肖 肖 肖Linear rectifiers are more popular. The figure is a schematic diagram of the switched power converter. The switching power supply conversion includes a switch sw and a storage inductor L. , diode D, regulated red and switching signal generator 11 (). The switching signal generator 11 〇 compares the voltage across the load & V2 with a reference voltage I to generate a switching signal to control the opening or closing of the switch SW. When the switch sw is turned on, the diode d is turned off, and the first power source is n-paired. The thief L charges 'that is, the energy storage inductor L stores the first - the energy of the power supply, on the other hand 'when the switch SW closes the day temple, the current stored in the energy storage inductor £ U 吏 diode D is turned on, and the second power source is % The form of the voltage regulator capacitor C and the load L power supply 帛 power v〗 and the second power source% ratio will be connected with the switch sw when Z and off _ find the case, _ city signal work (field theory) 7 'assumed the first The power source V1 is the source. When the load & fixed, the ratio of the switching signal to the second power source V2 is 'the second wire V2 is set to a value'. However, in practical applications, the load R1 changes when 'load & change to A large load consumes more energy. 'The electric-electric ship of the first-electricity may also depend on it, in order to maintain the second power supply %200941905 at a certain value'. The switching signal generating circuit U〇 is based on the reference voltage and the second power source V2. Change the duty cycle of the switching signal to make more energy % From the first power transfer to the load RL, and a second power source so obtained is maintained at a constant value. Such a switching signal generation method is a conventional pulse width modulation method. However, when the load RL becomes a small load and consumes less energy, the switching city generating circuit 110 also reduces the pulse width of the switching signal so that less ❹ is placed from the first power source V, Up to the load R1, however, the narrowest pulse width that the switching signal generating circuit 11 can generate still has a certain limit. When the switching signal generating circuit has provided the switching signal of the narrowest pulse width, the excess energy is still transmitted to Load RL 'At this time, the switching signal generating circuit will increase the spacing between each pulse (reducing the frequency of the switching signal), that is, the switching signal is generated by the conventional pulse frequency modulation (4) sefrequency modulahon) to further reduce the signal The energy delivered to the load R1 'maintains the second power source % at a constant value. ❹ == The switching signal generated by the wave frequency modulation mode may become the power supply noise affecting the load operation with the second power supply 2 and the load RL ', for example, = the frequency of the signal change · 2 · - when the two ^ = It is possible to hear switching noise originating from the switching signal. [Invention] In order to avoid the above problem, the y of the present invention provides a current for controlling the number of currents stored in the 200941905 to avoid switching signals. Switching power converters that fall into a particular frequency and how they operate. According to an embodiment of the invention, a switching power converter is provided. The switching power converter converts a first power source into a second power source according to a switching signal, and includes an energy storage component and a current controller. The energy storage component stores energy of the first power source and releases the energy in the form of the second power source; and the current switch is connected to the element to selectively enable the switch signal according to the switching signal The first-electrode is connected to the component, and the switching current is switched according to one of the switching signals to adjust a current value of the one of the energy storage components from the first power source. In accordance with an embodiment of the present invention, a method of operating the above described switched power converter is provided. The method includes using an energy storage component to store energy of one of the first power sources and releasing the energy in the form of the second power source; selectively: aligning the first power source to the energy storage component according to the switching signal; And switching the frequency according to one of the switching signals to adjust the current value of the energy storage from the first power source. [Embodiment] Fig. 2 is a schematic view of a switching type electric converter according to the present invention. The switching power converter 200 includes a current controller 22, a storage inductor 1, a polar body D, a voltage stabilizing capacitor C, and a switching signal generator. Please note that for the sake of simplicity, only the circuit components related to the present invention are shown in FIG. In addition, the circuit structure of the switching type electric singularity shown in FIG. 2 is only used as Fan Jianming, and the invention of 200941905 should not be limited to this circuit structure, and those skilled in the art can store under the teaching of the present invention. Various inductors can be replaced by other energy storage components (such as storage capacitors), or combined with buck converters, boost converters, flyback converters, etc. Switched DC power converters are used to design various switching power converters, and the above various variations are also within the scope of the present invention. Figure 3 is a flow chart of a method of operating a switched power converter in accordance with an embodiment of the present invention. The method of operating a switched power converter includes a plurality of steps 'divided into the lower:, a collar 310. A storage component is used to store one of the first power sources and release the energy in the form of a second power source. Step 320: selectively coupling the first power source to the energy storage element Q according to the switching signal. Step 330: Adjust a current value of one of the energy storage elements from the first power source according to one of the switching signals. - substantially the same result can be achieved. The steps of the above method are not necessarily performed in the order shown, and need not be continuous, i.e., other steps can be inserted or any of the above steps can be exchanged or omitted. The above steps (also
即第3圖所示之步驟）的各種變化均應視為落在本發明的範 疇之内。 X 200941905 切換式電源轉換器200依據一切換信號Ssw將一第一電源Vl 轉換為電壓值不同於第一電源v i之一第二電源％。在此實施例 中’第一電源V!與第二電源v2為電壓值不同之直流電源，而依 據步驟310，儲能電感L係儲存第一電源¥1之一能量並以第二電 源V2之形式釋放能量。切換信號產生器21〇係依據一參考電壓 vref與第二電源、v2以脈波頻率調變之方式纟生切換信號s s w。電 ❹流控制g 22(H系電性連接於儲能電感L與切換信號Ssw產生器 210，而依據步驟320，電流控制器22〇係用以依據切換信號Ssw 選擇性地使第-電源辆接至儲能電感[，建立第一電源^與儲能 電感L之間的電性連接路徑，使儲能賴L得以儲存第-電源％ 之能量。 ❹ 如前所述’當負載rl改變時，為使第二電源％維持在一定 值，切換信號產生器210會改變切換信號Ssw之頻率，以改變谓 量’然㈣了避免切換信號Ssw紅某叫 疋的頻率細而造成切換雜訊影響其他電關正常運作， ::號:w落入某些特定的頻率範圍前即改變自第一電源义輸: 件之電流大小，赠變傳遞自第—電源'之 電源％仍得維持在-定值。依據步驟33G，電流控 ^ 據切換信號Ssw之-切換頻率來調整自第,輪= =電流1l之值。熟悉此項技藝者當可設計出各種 流控制器220，以下任舉二鱗 ㈣種州態樣之! 200941905 第4圖係本發明切換式電源轉換器之一 器内部結構的示专圖。枝、、i > 實知例與其電流控制 第4圖揭露了 以思到’第4圖與第2圖不同之處在於 揭路了電源控制器220的内部結構，因此 第2圖相同之處於此不再 為求祕，與 不再^述本實關中，電源控制器220包 ^ 22、解多工器224與複數個開關哪、SW2、 ❺ 2 4圖中開關之數目與連接方式僅作為範例說明之用，不 ^視為本發明之限制，熟悉此項技藝者當可依其需要設計出不同 數目、連接方式之複數個開關。 為了避免切換信號之頻率落人某些特定的頻率細而影響其 他電路的正常運作，頻率檢測器222係依據切換信號Ssw之切換 頻率產生-開關麵信號Sc來控制解多工器224輸出切換信號 Ssw至適當的開關。例如，開關SWh SW2、SW3分別具有導通 電阻IU、R2、R3 (R1>R2>R3)，而當頻率檢測器222檢測到切 換頻率係大於2GKHz且小於1()()ΚΗζ時，則頻率檢測器222輸出 開關選擇信號Sc至解多工器224，使解多工器224輸出切換信號 Ssw控制開關SW2的導通與關閉，當開關SW2導通時，則第一電 源V!透過開關SW2儲存能量至儲能電感l，而當開關SW2關閉 時，儲能電感L以第二電源v2之形式釋放能量。 假設負載RL逐漸改變為一輕負載，為使第二電源％維持在 一定值，切換信號產生器210逐漸降低切換信號Ssw之切換頻率 200941905 以減少傳遞自第-電源％之能量，當頻率檢測器m檢測到切換 頻率即將低於20KHZ時’則頻率檢測器222輸出開關選擇信號心 至解多工器224 ’以使解多工器224輸出切換信號Ssw選擇性地控 制開關SW1的導通或關閉，貝"一電源％可在開關撕的導通 時，透過開關SW1儲存能量至儲能電感L。由於開關哪之導 通電阻R1大於開關SW2之料電阻幻，所簡使得流入儲能電 感L之電流iL減少’從而減少了傳遞自第—電源％之能量，故切 ❹換頻率將不再降低，而第二電源仍轉在—定值。類似地，當負 載RL改變為-重負載’為避免切換頻率大於1〇〇ΚΗζ，將改以導 通電阻較小之MSW3·性地紐連接第—電源Vi與儲能電 感L。為了增雜量職鱗，亦可同時導通複數侧咖如開 關W3 ,、SW2)以減關整體的等效阻抗，降低消耗在開關上 的能量。 ❹ 第5 ®係本發_換式《轉換H之另-實施編其賴控 制器内部結構的示意圖。請注意到第5圖與第4圖不同之處在於 第"圖揭路了另一種實現電源控制器22〇的内部結構，因此，為 求_，。與第4 _同之處於此將不再f述。在此實施例中，電 器220包3頻率檢測器226、電壓調整器228與開關sw。 ，率檢測盗226係依據切換信號Ssw之切換頻率產生一電壓調整 °’而電壓σ周正器228係電性連接於頻率檢測器與開關sw， 據糖膽信號Sv調整切換信號、之賴值，以產生一 - <切換錢Ssw，來輕該關之導通阻抗，而_㈣係用 200941905 電性連接 以依據調整後切換信號ssw，來選擇性地將該第一電源v 至該儲能電感L·。 1 在此實施例中，為了避免切換信號‘之切換頻 特定範圍秘他電路正常運作，係·具有仰賴值的； 整後切換Mssw，來控制開關sw導通時的導通阻抗，以藉 ❹That is, various changes in the steps shown in Fig. 3 should be considered to fall within the scope of the present invention. X 200941905 The switching power converter 200 converts a first power source V1 into a voltage value different from the second power source % of the first power source v i according to a switching signal Ssw. In this embodiment, the first power source V! and the second power source v2 are DC power sources having different voltage values, and according to step 310, the energy storage inductor L stores one energy of the first power source ¥1 and is the second power source V2. Form releases energy. The switching signal generator 21 generates the switching signal s s w according to a reference voltage vref and the second power source and v2 are modulated by the pulse frequency. The electric turbulence control g 22 (H is electrically connected to the energy storage inductor L and the switching signal Ssw generator 210, and according to step 320, the current controller 22 is configured to selectively enable the first power supply according to the switching signal Ssw Connected to the energy storage inductor [, establish an electrical connection path between the first power source ^ and the energy storage inductor L, so that the energy storage L can store the energy of the first power source. ❹ As described above, when the load rl changes In order to maintain the second power source % at a certain value, the switching signal generator 210 changes the frequency of the switching signal Ssw to change the denominator. (4) to avoid the switching signal Ssw red, the frequency of the call is small, and the switching noise is affected. Other electrical switches operate normally, ::No.: w changes to the current power range before falling into certain frequency ranges: the current magnitude of the device, the weight transfer from the first-power supply is still maintained at - According to step 33G, the current control switch signal Ssw is switched to the frequency to adjust the value from the first wheel == current 1l. Those skilled in the art can design various flow controllers 220, the following two Scale (four) state of the state! 200941905 Figure 4 is the invention A diagram of the internal structure of a power converter. Branch, i > The example of its implementation and its current control Figure 4 reveals that the difference between Figure 4 and Figure 2 is that the power is removed. The internal structure of the controller 220, so the second figure is the same, and is no longer a secret. In the actual description, the power controller 220 includes 22, the multiplexer 224 and the plurality of switches, SW2. The number and connection of the switches in the figures are for illustrative purposes only and are not to be considered as limiting the invention. Those skilled in the art can design a plurality of switches of different numbers and connections according to their needs. In order to prevent the frequency of the switching signal from falling to some specific frequency and affecting the normal operation of other circuits, the frequency detector 222 generates the switching surface signal Sc according to the switching frequency of the switching signal Ssw to control the output switching signal of the demultiplexer 224. Ssw to the appropriate switch. For example, the switches SWh SW2, SW3 have on-resistances IU, R2, R3 (R1 > R2 > R3), respectively, and when the frequency detector 222 detects that the switching frequency is greater than 2GKHz and less than 1 () () Frequency The detector 222 outputs the switch selection signal Sc to the demultiplexer 224, so that the demultiplexer 224 outputs the switching signal Ssw to control the on and off of the switch SW2. When the switch SW2 is turned on, the first power source V! stores the energy through the switch SW2. To the energy storage inductor l, when the switch SW2 is turned off, the energy storage inductor L releases energy in the form of the second power source v2. Assuming that the load RL is gradually changed to a light load, in order to maintain the second power source % at a certain value, the switching signal The generator 210 gradually reduces the switching frequency 200941905 of the switching signal Ssw to reduce the energy transmitted from the first-power source. When the frequency detector m detects that the switching frequency is about 20KHZ, then the frequency detector 222 outputs the switch selection signal to the solution. The multiplexer 224' selectively controls the switch multiplexer 224 to output the switching signal Ssw to turn on or off the switch SW1. The power source % can store energy to the storage inductor through the switch SW1 when the switch is turned on. L. Since the on-resistance R1 of the switch is greater than the material resistance of the switch SW2, the current iL flowing into the storage inductor L is reduced, thereby reducing the energy transmitted from the first-power source, so the switching frequency is no longer reduced. The second power source is still at the constant value. Similarly, when the load RL is changed to a -heavy load', in order to avoid the switching frequency being greater than 1 〇〇ΚΗζ, the MSW3·synthesis with a small on-resistance is connected to the first power source Vi and the energy storage inductor L. In order to increase the amount of job scales, it is also possible to turn on multiple side parties such as switch W3, SW2) to reduce the overall equivalent impedance and reduce the energy consumed on the switch. ❹ The 5th series is a schematic diagram of the internal structure of the controller. Please note that the difference between Fig. 5 and Fig. 4 lies in the fact that the internal structure of the power controller 22 is realized, and therefore, for _. The same as the 4th _ will not be described here. In this embodiment, the device 220 includes a frequency detector 226, a voltage regulator 228, and a switch sw. The rate detection 226 system generates a voltage adjustment according to the switching frequency of the switching signal Ssw, and the voltage σ week positive device 228 is electrically connected to the frequency detector and the switch sw, and adjusts the switching signal according to the sugar bile signal Sv. To generate a - < switch money Ssw, to light off the on-resistance, and _ (four) is electrically connected with 200941905 to selectively convert the first power supply v to the storage inductor according to the adjusted switching signal ssw L·. 1 In this embodiment, in order to avoid the switching signal ‘the switching frequency specific range, the other circuit is in normal operation, the system has the dependent value; the whole switch Mssw to control the on-impedance when the switch sw is turned on, so as to borrow
Vl的能量大小。開關SW可為f知的場:電晶 接面電晶體(BJT)或任何可利用開關電壓大小改變 1通阻抗之關元件。第6圖係具有不同電龜的調整後切換 W ‘的波形圖。例如’當切換頻率係大於20KHZ小於刚版 時，頻率檢測器226係輸出$ 對切—壓 210原本輪出之切換信號‘相刀同換 ❹ 觀時，瞒於 薄228針祕# Μ頓5周整信號SV使賴調整 切換域Ssw進行電壓調整，使電麵整器挪輸料The energy level of Vl. The switch SW can be a known field: a dielectric junction transistor (BJT) or any related component that can change the pass-through impedance by the magnitude of the switching voltage. Figure 6 is a waveform diagram of the adjusted switching W ′ with different electric turtles. For example, when the switching frequency is greater than 20KHZ and less than the rigid version, the frequency detector 226 outputs the switching signal of the original cut-off of the cut-and-pressure 210, and the knives are the same. The whole cycle signal SV causes the adjustment switching domain Ssw to perform voltage adjustment, so that the electric surface finisher moves the material
Ssw，，(〇V^2-8V) * ^ sw 0 说、有“電壓之切換信€Sswi，的控制，因 低的導通阻抗，使得第-鹤Vi彳扣 ^有較 切換頻率將不再提高。類似地，當負載R ^的此量，如此一來’ :率即將低於一頻率檢二 使電_整_對切換信號Ssw進行魏域SV 228輸出嫌解麵— 13 200941905 關sw因糾具有較低電壓之切換信號w的控制，因而在導通 時具有較高的導雜抗’使料—電源Vi僅傳遞較少的能量，如 此-來’切換頻率將不再降低。請注意到，上述之導通電壓值 (2.5V、2.8V、2.3V)僅料範例說明之用，不應視為本發明之限制， 熟悉此項技藝者當得依各種_之特性設計出各種不同的導通電 壓值。 〇 此夕卜H員技藝者亦可結合利用控制複數個開關之技術 (如對應第4圖之實施例)以及利用控制開關導通電壓之技術(如對 應第5圖之實施例)-起改變傳遞自第—電源之能量，以避免切換 頻率落入不適當的頻率範圍，於此不再贅述。 綜上所述’依據本發明實施例所提供之裝置與方法，可利用 調整自第-電源輸人儲能元件之電流大小改變傳遞自第一電源之 〇能量，以使得切換式魏轉換_切_林會落人紐特定頻 率範圍而影響其他電路的正常運作。 以上所述僅林㈣之實齡卜凡依本㈣申料利範圍所 做之均等變化與修饰，皆應屬本發明之涵蓋範圍。 【圖式簡單說明】 第1圖係習知切換式電源轉換器的示意圖。 第2圖係依據本發明切換式電源轉換器之—實施例的示意圖。 200941905 第3圖係依據本發明之一實施例之操作一切換式電源轉換器的方 法流程圖。 第4圖係本發明切換式電源轉換器之一實施例與其電流控制器内 部結構的示意圖。 第5圖係本發_赋電雜換H之另—實施例與其電流控制器 内部結構的示意圖。 第6圖係具有不同電壓值之調整後切換信號的波形圖。 〇 【主要元件符號說明】 100、200 切換式電源轉換器 110 ' 210 切換信號產生器 220 ί電流控制器 222 > 226 頻率檢測器 224 解多工器 228 電壓調整器Ssw,,(〇V^2-8V) * ^ sw 0 Say, there is "voltage switching letter SSwi, the control, due to the low on-resistance, so that the first - crane Vi彳 buckle ^ has a switching frequency will no longer Raise. Similarly, when this amount of load R ^, so that ': rate is about to be lower than a frequency check two make electricity _ whole _ to the switching signal Ssw to carry out the Wei domain SV 228 output suspicion surface - 13 200941905 Correcting the control of the switching signal w with a lower voltage, and thus having a higher conductance resistance when turned on, the material-power supply Vi only transmits less energy, so that the 'switching frequency will no longer decrease. Please note The above-mentioned on-voltage values (2.5V, 2.8V, 2.3V) are for illustrative purposes only and should not be considered as limitations of the present invention. Those skilled in the art will be able to design various conduction according to various characteristics. Voltage value. 〇 H H H 员 员 员 员 H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H Change the energy transmitted from the first - power source to avoid switching frequency falling into inappropriate frequency The scope and details are not described herein. In summary, the apparatus and method provided by the embodiment of the present invention can change the energy transmitted from the first power source by adjusting the magnitude of the current from the first-power input energy storage component. In order to make the switching type Wei conversion_cut_forest will fall into the specific frequency range of the new one, it will affect the normal operation of other circuits. The above is only the average change and modification of the forest (4) real life Bufan Yiben (4) BRIEF DESCRIPTION OF THE DRAWINGS [Brief Description of the Drawings] Fig. 1 is a schematic diagram of a conventional switching power converter. Fig. 2 is a schematic diagram of an embodiment of a switching power converter according to the present invention. 3 is a flow chart of a method for operating a switched power converter according to an embodiment of the present invention. Fig. 4 is a schematic diagram showing an embodiment of a switched power converter of the present invention and an internal structure of the current controller thereof. The figure is a schematic diagram of the internal structure of the embodiment and its current controller. Fig. 6 is a waveform diagram of the adjusted switching signal with different voltage values. REFERENCE SIGNS 100, 200 to the switching element power converter 110 'switches 210 signal generator 220 ί current controller 222 > 226 224 demultiplexer frequency detector voltage regulator 228