M414048 五、新型說明： 【新型所屬之技術領域】 本新型涉及一種調光驅動電路，尤其是具有返驰開關結構以提供高效 率及保護功能的穩定電源並驅動發光二極體。 【先前技術】 發光二極體(LED)由於具有發光效率高、使用壽命長的優點，因而在節 能環保的風潮下，傳統照明領域已逐漸利用LED取代已被廣泛使用的白熾 燈。M414048 V. New description: [New technical field] The present invention relates to a dimming driving circuit, in particular to a stable power supply having a flyback switch structure to provide high efficiency and protection functions and to drive the light emitting diode. [Prior Art] Due to the advantages of high luminous efficiency and long service life, LEDs have gradually replaced LEDs with widely used incandescent lamps in the field of energy saving.
雖然LED的驅動技術已發展得相當成熟，並具備了市場廣泛推廣的基 礎，但是在建置及置換的成本考慮下，LED要取代白熾燈便還需直接面對 相容於現有調光器的問題。以目前比較常見的·調光器為例，是使用交流輸 入的前沿相切方式，也即一般用於驅動如白熾燈的純電阻負載。然而，現 有技術的缺點在於，當連接容性負載時，相切瞬間產生的電壓對輸入電容 充電與線路巾的電齡形成職，造成開關的織作，使輸人交流電壓波 形不敎’因而聽鶴纟統的輸丨產生LED賴或異音的舰，甚至嚴 重時可能永久損壞純H件，而使調光II無法正常工作。 此外’現有的LED驅動刷電棘置普遍存在功相數低，電流精度 低等缺點，其中低功率因數會導致電力栅格中的證波能量變大，加重電力 柵格負擔’另-方面，電流精度低會大幅影響LED的使用壽命。 要一種電返驰式可調光發光二極體驅動電路，能提高功率因 數並改。電〜精度，以解決上述現有技術的問題。 【新型内容】 包括的在於提供一種返馳式可調光發光二極體驅動電路， 晶片控制、返驰開關單元、輪出濾波單元、回饋採樣單元、 制，輪出_元進行*;皮並=:=== 3 M414048 體(LED) ’，_娜單元連接錢輪出電源⑽行_雜，過沖吸收單元Although the driving technology of LED has developed quite maturely and has the basis of extensive market promotion, in terms of the cost of construction and replacement, LEDs need to directly replace the existing dimmers in order to replace incandescent lamps. problem. Taking the more common dimmers as an example, it is a front-end tangent method using an AC input, that is, a purely resistive load that is generally used to drive an incandescent lamp. However, the disadvantage of the prior art is that when the capacitive load is connected, the voltage generated by the tangent moment charges the input capacitor and the battery age of the line towel, causing the switch to be woven, so that the input AC voltage waveform is not ambiguous. The cranes of the cranes produce LEDs or abnormal sounds. Even in severe cases, they may permanently damage the pure H parts, and the dimming II will not work properly. In addition, the existing LED driver brush has a disadvantages such as low number of work phases and low current accuracy. The low power factor causes the power of the proof wave in the power grid to increase, which increases the burden of the power grid. Low current accuracy can significantly affect the life of the LED. An electric flyback type dimmable light emitting diode driving circuit can be used to improve the power factor and change. Electrical ~ precision to solve the above problems of the prior art. [New content] includes providing a flyback type dimmable light emitting diode driving circuit, a wafer control, a flyback switching unit, a wheel-out filtering unit, a feedback sampling unit, a system, and a round-out_element; =:=== 3 M414048 Body (LED) ', _ Na unit connection money wheel power supply (10) line _ miscellaneous, overshoot absorption unit
购㈣酬咖開關單元 -伴可調光魏二極體驅動電路中，該輸人整·'波單元包括-後级ΐ容:!接電阻、一變阻器、一共模驗電感、-前級電容、 -^電橋以及—輸入遽波電容，該保險絲的—端連接該第娃，胁r、險絲的另—端連接該變阻11的—端以及該前級電容的一 連接ϊ變ΐ-ϊ電阻的r端連ί該第二交流端，該輪入串接電阻的另一端 丘模二雷^另―端以及該前級電容的另—端’該前級電容並聯連接該 二肺访每# 一極體、帛一一極體、-第三二極體以及-第四 極體的一負極連接該第二二極體的-正極以及該後級電 该第三二極體的—負極連接該第四二極體的—正極以及該後級 ==1端，而該第一二極體的—正極、該第三二極體的—正極以及該 L/ΐ 的-端連接綠接地，該第二二極_—_以及該第四二 體的—負極連接該第一信號以及該輸入濾波電容的另一端。 馳鐵^觀式可調光發光二極體驅動電路中，該返馳關單元包括一返 姑二丄器、—電晶體以及一採樣電阻，該返触變壓器連接該第一信號、該 U虎。玄第二輔助信號、該第四信號、該第五信號、該系統接地以及 系，接地，且該職懸闕ϋ連接該第―信號、該第四信號、 五信號以及該另一系統接地，而該返馳變壓器的一第二側連接該第三 ^娩、該第三輔助信號以及該系統接地，該電晶體為一金屬氧化物半導體 場^應電晶體_舰丁），且該電晶體的一及極連接該第四信號，該電晶體 的閘極連接該第九信號，該電晶體的一源極以及該採樣電阻的一端連接 該第六信號，且該採樣電阻的另一端連接該系統接地。 調 第 另 f該返驰式可調光發光二極體驅動電路中，該輸出濾波單元包括—輪 出整流二極體、一第一濾波電容、一電流檢測電阻以及一第二濾波電容， X輪出整流二極體的一正極連接該第三信號，該輸出整流二極體的一負 、、該第—濾波電容的一端以及該第二濾波電容的一端連接該直流輪出電 源的第一直流輸出端，該第一濾波電容的另一端以及該電流檢測電阻的一 4 M414048Purchase (four) remuneration coffee switch unit - with dimmable Wei dipole drive circuit, the input integral · 'wave unit includes - after the level of capacitance:! Connected resistor, a varistor, a total modulo inductance, - pre-capacitor , -^ bridge and - input chopper capacitor, the end of the fuse is connected to the first arm, the other end of the shunt, the dangerous wire is connected to the end of the varistor 11 and a connection of the preamplifier is changed. The r end of the ϊ resistor is connected to the second AC terminal, and the other end of the turn-in series resistor is connected to the other end of the capacitor and the other end of the preamplifier. The preamplifier is connected in parallel to the two lungs. Interviewing a negative electrode of each of the first diode, the third diode, and the fourth pole, and the anode of the second diode, and the third electrode of the second diode a negative electrode connected to the positive electrode of the fourth diode and the rear stage ==1 end, and the positive electrode of the first diode, the positive electrode of the third diode, and the end of the L/ΐ connection Green ground, the second diode ___ and the negative electrode of the fourth body are connected to the first signal and the other end of the input filter capacitor. In the Chi-Twist-type dimmable light-emitting diode driving circuit, the fly-back unit includes a returning diode, a transistor, and a sampling resistor, and the returning transformer connects the first signal, the U-tube . a second auxiliary signal, the fourth signal, the fifth signal, the grounding of the system, and a grounding, and the first suspension connects the first signal, the fourth signal, the fifth signal, and the other system ground, And a second side of the flyback transformer is connected to the third feeding, the third auxiliary signal, and the system is grounded, the transistor is a metal oxide semiconductor field, and the transistor is The first and the poles are connected to the fourth signal, the gate of the transistor is connected to the ninth signal, a source of the transistor and one end of the sampling resistor are connected to the sixth signal, and the other end of the sampling resistor is connected to the System grounding. In the flyback type dimmable light emitting diode driving circuit, the output filtering unit includes a wheel rectifying diode, a first filter capacitor, a current detecting resistor and a second filter capacitor, X A positive electrode of the rectifying diode is connected to the third signal, a negative of the output rectifying diode, one end of the first filtering capacitor, and one end of the second filtering capacitor are connected to the first of the DC power supply a DC output terminal, the other end of the first filter capacitor and a current detecting resistor of 4 M414048
端連接該系統接地，該電流檢測電阻的—端 該流輪出電源的第二直流輸出端。 一慮波 饋二發ίΓ體驅動電路中’該回饋採樣單元包括一 光耗合限流電阻一光齡林、-第-分壓電阻、-第 ::二―第一回饋電阻、一第一回饋電容、-第二回饋電阻、-! 一電流檢測電阻、一第三濾波電容以及-發射極電阻，該回 有—電流控制端…電壓感測端、—電源輸人端 '一電源輸 端以及—電壓控綱，用輯電壓和電流進行採樣控制， ^電阻的-端連接該第-直流輸出電源，該第—分壓電阻的另一 ==回饋電容的另—端連接該回饋控制晶片的電源輸出端，該電流檢 測電阻的-端連接該_測晶片的電壓感測端，該電流檢測電阻的另一 ΐί接=統接地，該第二回饋電阻的—端連接該回饋控侃片的電源輸 出知’遠第二回饋電阻的另-端連接該第二回饋電容的—端，而該第二淚 波電容的另—端連接該第二直流輸出端以及該回饋控U的電流控制“ 端，該光齡元件包含_祕合電晶體及—發光二_，該細合電晶體 的-集_連接賴電極信號’該線合電晶體的—發射極以及該發射極 電阻的-端連接該第七信號，該發射極電阻的另—端連接該系統接地，而 I»光二極_-正極連接該絲合限流電阻的—端，該雜合限流電阻 的另-端以及該第三·電容的-端連接該回饋控制晶片的電源輸入端， 而該第三紐電容的另-端連接該系統接地，該發光二極體的—負極、該 第-濾、波電容的_端以及該第二滤波電阻的—猶麵_控制晶片的電 源輸出端’該第二舰電闕另-端連接該第二紐電容的_端，而該第 二滤波電容的另-端連接細雜制“的電源輸人端以及該第二直流輸 出端。 電容的一端連接 回 該 曰a 在該返馳式可調光發光二極體驅動電路中，該晶片控制單元包括一控 制aa片、一電源濾、波電谷、一整流二極體、一感測電阻、一感測電容、一 第一電阻、一第二電阻、一第三電阻、一苐四電阻、一第五電阻、一第六 電阻以及一比較電谷，該控制晶片為具有脈寬調制pW]yQ功能的控制晶 5 片並具有-回饋端、一比較端、一多工端、一感測端、一電源端、一驅 =端、-接地端以及-檢測端，該第—電阻的—端連接該第—信號，該第 -電阻的另-端連接該第二電阻的—端以及該控制晶片的多工端，該感測 電阻的-端連接該第六信號，該感測電阻的另_端以及該感測電容的—端 連接該控制晶片的-感測端，該感測電容的另__端連接該另—系統接地， 該控制晶片的魏端連觀集電極信號，雜制晶片的接地猶接該另一 系統接地，該控制晶片的驅動端連接該第八信號，該第六電阻的一端以及 該整流二極體的一正極連接該第五信號，該第六電阻的另一端連接該控制 晶片的檢測端，該整流二極體的一負極端連接該電源濾波電容的一端，該 電源濾波電容的另一端連接該系統接地，該第三電阻的一端以及該第四電 阻的一端連接該第七信號，而該第三電阻的另一端連接該另一系統接地， 該第四電阻的另一端以及該比較電容的一端連接該控制晶片的回饋端，而 該比較電容的另一端連接該第五電阻的一端，且該第五電阻的另一端連接 該控制晶片的比較端。 在該返馳式可調光發光二極體驅動電路中，該過沖吸收單元包括一穩 壓二極體，該穩壓二極體的一正極連接該第一信號且該穩壓二極體的一負 極連接該第四信號；或該過沖吸收單元包括一過沖吸收電阻、一過沖吸收 電容以及一過沖吸收二極體，該過沖吸收電阻的一端以及該過沖吸收電容 的一端連接該第一信號，該過沖吸收電阻的另一端以及該過沖吸收電容的 另一端連接該過沖吸收二極體的一負極，該過沖吸收二極體的一正極連接 該第四信號；或該過沖吸收單元包括一穩壓二極體以及一過沖吸收二極 體，該穩壓二極體的一正極連接該第一信號’該穩壓二極體的一負極連接 該過沖吸收二極體的一負極，該過沖吸收二極體的一正極連接該第四信 號；或該過沖吸收單元包括一穩壓二極體、一過沖吸收電阻、一過沖吸收 電容以及一過沖吸收二極體，該穩壓二極體的一正極、該過沖吸收電阻的 一端以及該過沖吸收電容的一端連接該第一信號，該穩壓二極體的一負 極、該過沖吸收電阻的另一端以及該過沖吸收電容的另一端連接該過沖吸 收二極體的一負極，該過沖吸收二極體的一正極連接該第四信號；或該過 沖吸收單元包括一穩壓二極體、一過沖吸收電阻以及一過沖吸收二極體， 該穩壓二極體的一正極以及該過沖吸收電阻的一端連接該第一信號，該穩 M414048 壓二極體的一負極以及該過沖吸收電阻的另—端連接該過沖吸收二極體的 一負極，該過沖吸收二極體的一正極連接該第四信號；或該過沖吸收單元 包括一穩壓二極體、一過沖吸收電容以及一過沖吸收二極體，該穩壓二極 體的一正極以及該過沖吸收電容的一端連接該第一信號，該穩壓二極體的 一負極以及該過沖吸收電容的另一端連接該過沖吸收二極體的一負極，該 過沖吸收二極體的一正極連接該第四信號；或該過沖吸收單元包括一過沖 吸收電阻、一過沖吸收電容、另一過沖吸收電阻以及一過沖吸收二極體， 該過沖吸收電阻的一端以及該過沖吸收電容的一端連接該第一信號，該過 沖吸收電阻的另一端以及該過沖吸收電容的另一端連接該另一過沖吸收電 阻的一端，該另一過沖吸收電阻的另一端連接該過沖吸收二極體的一負 極，該過沖吸收二極體的一正極連接該第四信號；或該過沖吸收單元包括 一過沖吸收電阻、一過沖吸收電容、另一過沖吸收電阻以及一過沖吸收二 極體，該過沖吸收電阻的一端以及該過沖吸收電容的一端連接該第一信 號，該過沖吸收電阻的另一端以及該過沖吸收電容的另一端連接該過沖吸 唛二極體的一負極，該過沖吸收二極體的一正極連接該另一過沖吸收電阻 的一端’該另一過沖吸收電阻的另一端連接該第四信號。 在該返馳式可調光發光二極體驅動電路中，該驅動單元包括一驅動電 阻，該驅動電阻的一端連接該第八信號，且該驅動電阻的另一端連接該第 九信號；或該驅動單元包括一驅動電阻、另一驅動電阻以及一驅動二極體， 該驅動電阻的一端連接該第八信號，且該驅動電阻的另一端連接該第九信 號，该驅動二極體的一負極連接該第八信號，該驅動二極體的一正極連接 該另一驅動電阻的一端，該另一驅動電阻的一另一端連接該第九信號；或 該驅動單元包括一驅動電阻、另一驅動電阻以及一驅動二極體，該驅動電 阻的一端連接該第八信號，且該驅動電阻的另一端連接該第九信號，該另 一驅動電阻的一端連接該第八信號，該另一驅動電阻的另一端連接該驅動 二極體的一負極，該驅動二極體的一正極連接該第九信號；或該驅動單元 包括一驅動電阻以及一驅動二極體，該驅動電阻的一端以及該驅動二極體 的一負極連接該第八信號，且該驅動電阻的另一端以及該驅動二極體的一 正極連接該第九信號。 7 g414048 :在該返馳式可調光發光二極體驅動電路中，該調光控制單元包括一第 調，電ρ且第二調光電阻、一第三調光電阻、一第四調光電阻、一第 -調，電晶體、—第二調光電晶體、—第—調光二極體、—第二調光二極 ，、一第了調光電容以及一第二調光電容，且該第一調光電晶體為_電 03^而第一調光電晶體為M〇SFET，該第一調光電阻的一端連接該第一 信號，該第一調光電阻的另一端連接該第一調光二極體的一正極、該第二 調光電阻的一端以及該第一調光電晶體的一基極，該第二調光電阻的另一 端以及該第—調光電晶體的一集電極連接該另一系統接地，該第一調光二 極體的負極連接該第一調光電晶體的一發射極、該第一調光電容的一 端、該，二調光二極體的一負極以及該第二調光電晶體的一閘極。該第一 • 調光電容的另一端、該第二調光二極體的一正極、該第二調光電晶體的一 源極以及該第四調光電_ —端連接該另-祕接地，且該第二調光電晶 體的一汲極以及該第四調光電阻的另一端連接該另一系統接地，該第三調 光電阻的-端連接該第_信號’該第三調光電阻的另—猶接該第二調光 電容的一端，而該第二調光電容的另一端連接該另一系統接地。 本返驰式可調光發光一極體驅動電路具備高功率因數、高電流精度、 尚效率的特點，並符合安全標準，適用於各類LED驅動電源同時支援交 流輸入的三極體流開關(TRIAC)調光功能。 【實施方式】 Φ 以下將對本新型以示範性實施的方式做更詳細的說明，以使熟悉本領 域技術之人在研讀本說明書後能據以實施。 參考圖1 ’圖1為本新型返馳式可調光發光二極體驅動電路的示意圖。 如圖1所示，本新型的返馳式可調光發光二極體驅動電路丨包括輸入整流 濾波單元10、返驰開關單元20、輸出濾波單元30、回饋採樣單元40、晶 片控制單元50、過沖吸收單元60、驅動單元7〇以及調光控制單元8〇，用 以將交流輸入電源VAC轉換成直流輸出電源v0，進而供電給外部的至少 一 LED (圖中未示）。 交流輸入電源VAC具有第一交流端VAc+以及第二交流端VAC_，而直 流輸出電源vo具有第一直流輸出端vo+以及第二直流輪出端v〇_。 8 M414048 -信經整細波後轉換成第 生第H V3、第：輔^妹^ J 進行返驰開關控制，並產 Ϊ^ Μ信號V4、第五信號V5以及第六 二tr:==3〇連接第三信號％以及第三輔助信號V3Y以進 订遽波’並產生直4轉源直流輸出電源v〇供電給外部的咖。 回饋採樣單元40連接錢如獅ν〇科五魏v5⑽行回The terminal is connected to the ground of the system, and the current detecting resistor is connected to the second DC output terminal of the power supply. In the driving circuit, the feedback sampling unit includes a light-consuming current limiting resistor, a light-aged forest, a first-divider resistor, a -:: two first feedback resistor, a first Feedback capacitor, - second feedback resistor, -! A current sense resistor, a third filter capacitor and - emitter resistor, the back has - current control terminal ... voltage sensing terminal, - power input terminal - a power supply terminal And - the voltage control, the voltage and current are used for sampling control, the - terminal of the resistor is connected to the first-DC output power, and the other end of the first-dividing resistor is connected to the feedback control chip. The power output end of the current detecting resistor is connected to the voltage sensing end of the _ test chip, and the other end of the current detecting resistor is connected to the ground, and the end of the second feedback resistor is connected to the feedback control chip The power supply output knows that the other end of the second second feedback resistor is connected to the end of the second feedback capacitor, and the other end of the second tear wave capacitor is connected to the second DC output terminal and the current control of the feedback control U "End, the light age component contains _ secret crystal a body--light-emitting diode _, the fused-electrode signal of the fused-electrode--the emitter-emitter of the fused-electrode and the terminal of the emitter resistor are connected to the seventh signal, and the emitter resistor is further The end is connected to the ground of the system, and the I»optical diode _- positive pole is connected to the end of the wire current limiting resistor, and the other end of the hybrid current limiting resistor and the end of the third capacitor are connected to the feedback control chip a power input end, and the other end of the third capacitor is connected to the ground of the system, the negative pole of the light emitting diode, the _ terminal of the first filter, the wave capacitor, and the second filter resistor Controlling the power output end of the chip, the second power supply is connected to the other end of the second capacitor, and the other end of the second filter capacitor is connected to the fine power supply input terminal and the second DC output. One end of the capacitor is connected back to the 曰a. In the flyback dimmable light emitting diode driving circuit, the wafer control unit includes a control aa chip, a power filter, a wave valley, a rectifying diode, and a sense Measuring the resistance, a sensing capacitance, a first resistance, a second resistance, a third resistance, a fourth resistance, a fifth resistance, a sixth resistance, and a comparison electric valley, the control wafer has a pulse width Modulating the pW]yQ function of the control crystal 5 chip and having a - feedback terminal, a comparison terminal, a multiplex terminal, a sensing terminal, a power terminal, a driver = terminal, a ground terminal, and a detection terminal, the first The other end of the resistor is connected to the first signal, the other end of the first resistor is connected to the end of the second resistor and the multiplex end of the control chip, and the end of the sensing resistor is connected to the sixth signal, the sense The other end of the measuring resistor and the end of the sensing capacitor are connected to the sensing terminal of the control chip, and the other terminal of the sensing capacitor is connected to the other system ground, and the Wei end of the control chip is connected to the collector signal. The ground of the miscellaneous wafer is connected to the ground of the other system, and the drive of the control chip The end is connected to the eighth signal, and one end of the sixth resistor and a positive pole of the rectifying diode are connected to the fifth signal, and the other end of the sixth resistor is connected to the detecting end of the control chip, and one of the rectifying diodes The negative end is connected to one end of the power filter capacitor, and the other end of the power filter capacitor is connected to the ground of the system. One end of the third resistor and one end of the fourth resistor are connected to the seventh signal, and the other end of the third resistor is connected. The other system is grounded, the other end of the fourth resistor and one end of the comparison capacitor are connected to the feedback end of the control chip, and the other end of the comparison capacitor is connected to one end of the fifth resistor, and the other end of the fifth resistor A comparison end of the control wafer is connected. In the flyback dimmable light emitting diode driving circuit, the overshoot absorption unit includes a voltage stabilizing diode, and a positive electrode of the voltage stabilizing diode is connected to the first signal and the voltage stabilizing diode a negative electrode connected to the fourth signal; or the overshoot absorption unit includes an overshoot absorption resistor, an overshoot absorption capacitor, and an overshoot absorption diode, one end of the overshoot absorption resistor and the overshoot absorption capacitor The first signal is connected to one end, the other end of the overshoot absorption resistor and the other end of the overshoot absorption capacitor are connected to a negative electrode of the overshoot absorption diode, and a positive connection of the overshoot absorption diode is connected to the fourth a signal; or the overshoot absorbing unit includes a voltage stabilizing diode and an overshoot absorbing diode, wherein a positive pole of the stabilizing diode is coupled to the first signal, and a negative electrode of the stabilizing diode is coupled to the signal Overshooting a negative electrode of the diode, the positive electrode of the overshoot absorption diode is connected to the fourth signal; or the overshoot absorption unit comprises a voltage stabilizing diode, an overshoot absorption resistor, and an overshoot absorption Capacitor and an overshoot absorbing diode, a positive pole of the voltage stabilizing diode, one end of the overshoot absorbing resistor, and one end of the overshoot absorbing capacitor are connected to the first signal, a negative pole of the stabilizing diode, the other end of the overshoot absorbing resistor, and the The other end of the overshoot absorbing capacitor is connected to a negative electrode of the overshoot absorbing diode, and a positive electrode of the overshoot absorbing diode is connected to the fourth signal; or the overshoot absorbing unit comprises a voltage stabilizing diode, An overshoot absorption resistor and an overshoot absorption diode, a positive pole of the voltage regulator diode and one end of the overshoot absorption resistor are connected to the first signal, a negative pole of the stable M414048 voltage diode and the overshoot The other end of the absorbing resistor is connected to a negative electrode of the over-absorption absorbing diode, and a positive electrode of the over-absorption absorbing diode is connected to the fourth signal; or the over-shooting absorbing unit comprises a voltage stabilizing diode a snubber capacitor and an overshoot absorbing diode, a positive pole of the stabilizing diode and one end of the overshoot absorbing capacitor are connected to the first signal, a negative pole of the stabilizing diode and the overshoot absorbing capacitor The other end of the connection a negative electrode of the diode, the positive electrode of the overshoot absorption diode is connected to the fourth signal; or the overshoot absorption unit includes an overshoot absorption resistor, an overshoot absorption capacitor, another overshoot absorption resistor, and a Overshooting the absorption diode, one end of the overshoot absorption resistor and one end of the overshoot absorption capacitor are connected to the first signal, and the other end of the overshoot absorption resistor and the other end of the overshoot absorption capacitor are connected to the other One end of the absorption resistor, the other end of the other overshoot absorption resistor is connected to a negative electrode of the overshoot absorption diode, and a positive electrode of the overshoot absorption diode is connected to the fourth signal; or the overshoot absorption unit An overshoot absorption resistor, an overshoot absorption capacitor, another overshoot absorption resistor, and an overshoot absorption diode, one end of the overshoot absorption resistor and one end of the overshoot absorption capacitor are connected to the first signal, The other end of the overshoot absorption resistor and the other end of the overshoot absorption capacitor are connected to a negative electrode of the overshoot suction diode, and a positive electrode of the overshoot absorption diode is connected to one of the other overshoot absorption resistors. The other end of the other overshoot absorbing resistor is coupled to the fourth signal. In the flyback type dimmable light emitting diode driving circuit, the driving unit includes a driving resistor, one end of the driving resistor is connected to the eighth signal, and the other end of the driving resistor is connected to the ninth signal; or The driving unit includes a driving resistor, another driving resistor and a driving diode, one end of the driving resistor is connected to the eighth signal, and the other end of the driving resistor is connected to the ninth signal, and a negative electrode of the driving diode Connecting the eighth signal, a positive pole of the driving diode is connected to one end of the other driving resistor, and the other end of the other driving resistor is connected to the ninth signal; or the driving unit includes a driving resistor and another driving a resistor and a driving diode, one end of the driving resistor is connected to the eighth signal, and the other end of the driving resistor is connected to the ninth signal, and one end of the other driving resistor is connected to the eighth signal, the other driving resistor The other end of the driving diode is connected to a negative pole of the driving diode, and a positive pole of the driving diode is connected to the ninth signal; or the driving unit comprises a driving resistor and a driving The second diode is connected to one end of the driving resistor and a negative terminal of the driving diode, and the other end of the driving resistor and a positive electrode of the driving diode are connected to the ninth signal. 7 g414048: In the flyback dimmable light emitting diode driving circuit, the dimming control unit includes a first adjustment, an electric ρ and a second dimming resistor, a third dimming resistor, and a fourth dimming a resistor, a first-tone, a transistor, a second dimming crystal, a first dimming diode, a second dimming dipole, a first dimming capacitor, and a second dimming capacitor, and The first dimming crystal is an M〇SFET, and the first dimming resistor is connected to the first signal, and the other end of the first dimming resistor is connected to the first tune. a positive electrode of the photodiode, one end of the second dimming resistor, and a base of the first dimming crystal, the other end of the second dimming resistor and a collector of the first dimming crystal are connected The other system is grounded, the negative electrode of the first dimming diode is connected to an emitter of the first dimming crystal, one end of the first dimming capacitor, a negative electrode of the dimming diode, and the first A gate of a dimming optoelectronic crystal. The other end of the first dimming capacitor, a positive pole of the second dimming diode, a source of the second dimming crystal, and the fourth dimming photo terminal are connected to the other ground, and One drain of the second dimming crystal and the other end of the fourth dimming resistor are connected to the other system ground, and the end of the third dimming resistor is connected to the third signal of the third dimming resistor - is connected to one end of the second dimming capacitor, and the other end of the second dimming capacitor is connected to the other system ground. The flyback dimmable light-emitting one-pole driving circuit has the characteristics of high power factor, high current precision, and high efficiency, and meets safety standards, and is suitable for various types of LED driving power sources and supports three-phase flow switching of AC input ( TRIAC) dimming function. [Embodiment] Φ Hereinafter, the present invention will be described in more detail in an exemplary manner, so that those skilled in the art can implement the present invention after studying the present specification. Referring to FIG. 1 ', FIG. 1 is a schematic diagram of a novel flyback type dimmable light emitting diode driving circuit. As shown in FIG. 1 , the flyback dimmable light emitting diode driving circuit of the present invention includes an input rectifying and filtering unit 10, a flyback switching unit 20, an output filtering unit 30, a feedback sampling unit 40, a wafer control unit 50, The overshoot absorption unit 60, the driving unit 7A, and the dimming control unit 8A are configured to convert the AC input power source VAC into a DC output power source v0, thereby supplying power to at least one LED (not shown). The AC input power source VAC has a first AC terminal VAc+ and a second AC terminal VAC_, and the DC output power source vo has a first DC output terminal vo+ and a second DC wheel output terminal v〇_. 8 M414048 - The letter is converted into the first H V3, the first: the second ^ ^ ^ J to perform the flyback switch control, and produce the Ϊ ^ Μ signal V4, the fifth signal V5 and the sixth two tr: == 3 〇 Connect the third signal % and the third auxiliary signal V3Y to subscribe to the chopping 'and generate a straight 4 source DC output power v〇 to supply the external coffee. The feedback sampling unit 40 is connected to the money lion 〇 〇 五 五 Wei v5 (10) line back
樣，並產生第七錢V7，而晶片控制單元5〇連接第一信號νι '第五作號 V5、第六信號V6以及紅信號V7，並控制及產生第人信號v8，且由第二 信號VI及第五信號V5產生集電極信號vc，並傳送至回饋採樣單元4〇。 過沖吸收單元60的-料接第_信號V1，過沖魏單元6㈣另一端連接 第四信號V4，用以進行過沖吸收控制。驅動單元7()的—端連接第八信號 V8，且驅動單元7G的另端連接第九信號V9，而第九信號V9進一步連° 接並驅動返馳開關單元20。調光控制單元80連接第一信號V1，以進行調 光控制。 此外，一系統接地連接返驰開關單元20、輸出濾波單元3〇、回饋採樣 單元40以及晶片控制單元5〇，而另一系統接地連接反輸入整流濾波單元 10、返馳開關單元20、回饋採樣單元40、晶片控制單元5〇以及調光控制 單元80。 參考圖2 ’圖2為本新型輸入整流濾波單元的示意圖，其中輸入整流渡 波單元10包括保險絲FUSE、輸入串接電阻R1X、變阻器MOV、共模濾 波電感L1、前級電容CX1、後級電容CX2、整流電橋BD1以及輸入濾波 電容C1。保險絲FUSE的一端連接第一交流端VAC+，保險絲FUSE的另 一端連接變阻器MOV的一端以及前級電容CX1的一端。輸入串接電阻R1X 的一端連接第二交流端VAC-，輸入串接電阻R1X的另一端連接EMI濾波 器MOV的另一端以及前級電容CX1的另一端。前級電容CX1並聯連接共 模濾波電感L1的一側，而所述後級電容CX2並聯連接所述共模濾波電感 L1的另一側。 整流電橋BD1包括第一二極體DB1、第二二極體DB2、第三二極體 DB3以及第四二極體DB4，其中第一二極體DB1的負極連接第二二極體 DB2的正極以及後級電容CX2的一端，第三二極體DB3的負極連接第四 9 M414048 二極體DB4的正極以及後級電容CX2的另一端，而第一二極體DB1的正 極、第二二極體DB3的正極以及輸入濾波電容ci的一端連接系統接地， 第二二極體DB2的負極以及第四二極體DB4的負極連接第一信號νι以及 輸入濾波電容C1的另一端。 參考圖3，圖3為本新型返馳開關單元的示意圖，其中返驰開關單元 20包括返馳變壓器T、電晶體Qi以及採樣電阻RS，其中返馳變壓器τ連 接第-信號V；l、第三信號V3、第三輔助錢ν3γ、第四信號V4、第五信 號V5、系統接地以及另一系統接地，且返驰變壓器τ的第一側連接第一信 號VI第四號V4、第五>(吕號V5以及另一系統接地，而返馳變壓器τ的 第二側連接第三信號V3、第三輔助信號V3Y以及系統接地。f晶體Q1為 MOSFET’且電晶體Q1的汲極連接第四信號V4,電晶體Q1的間極連接第 九信號V9 ’電晶體Q1的源極以及採樣電阻RS的一端連接第六信號v6， 且採樣電阻RS的另一端連接系統接地。 參考圖4 ’圖4為本新型輸出遽波單元的示意圖，其中輸出淚波單元 3〇包括輸出整流二極體D3X、第一渡波電容C3X、電流檢測電阻腿以 及第二滤波電容C3Y’且輸出整流二極體服的正極連接第三信號V3， 輸出整流二極體D3X的負極、第—渡波電容⑽的—端以及第三氣皮電容 C3Y的-端連接直流輸出電源v〇的第一直流輸出端v〇+，第一遽波電容 C3X的另-_及電流檢測電阻⑽的—端連接系統接地1流檢測電阻 R3X的$ 以及第慮波電容C3Y的另—端連接直流輸出電源vq的第 二直流輸出端VO·。此外，可針對不同的輸出紋波要求而進—步增加π型 濾波電路或共模濾波電路。 參考圖5，圖5為本新型回饋採樣單元的示意圖，其中回饋採樣單元 40包括回饋控制晶片UC、光麵合限流電阻RTL、光揭合元件TL、第一分 壓電阻R41、第—刀壓電阻R42、第—回饋電阻R43、第—回饋電容⑽、 第二回饋電阻R44、第二回饋電容㈤、限流電阻R45、第三滤波電容⑶ 以及發射極電阻R46。 回饋控制晶片uc具有電流控制端ICTRL、電麼感測端VSENSE、電 源輸入端vcc、電源輸出端νουτ、接地端GN〇以及電壓控制端vctrl， 用以對電壓和電流進行採樣控制。 M.414U46 R41二2電ί”的一端連接第一直流輪出電源_，第一分壓電阻 接回饋控制晶片UC的電餘制戚vrTm③ ㈣阻似3的知連 接第-回饋電容C41=:第CdT=-_R43的另-端連 a α υΓ 第回饋電谷C41的另一端連接回饋控制 Β日片UC的電源輸出端VOUT。 的—端連接回饋控制晶片Uc的電壓感測端VSENSE， 二曰片uc 連接系統接地。第二回饋電阻R44的-端連接回饋 ===端νουτ’第二回饋電阻R44的另-端連接第二 w貝、义Γ #、端’而第二回饋電容C42的另一端連接第二直流輪出端 V0-以及回饋控制晶片uc的電流控制端ICTRL。And generating a seventh money V7, and the wafer control unit 5 is connected to the first signal ν 'the fifth number V5, the sixth signal V6 and the red signal V7, and controls and generates the first person signal v8, and is controlled by the second signal The VI and the fifth signal V5 generate a collector signal vc and transmit it to the feedback sampling unit 4〇. The overshoot absorption unit 60 is connected to the first signal V1, and the other end of the overshoot Wei unit 6 (four) is connected to the fourth signal V4 for overshoot absorption control. The - terminal of the driving unit 7() is connected to the eighth signal V8, and the other end of the driving unit 7G is connected to the ninth signal V9, and the ninth signal V9 is further connected to and drives the flyback switching unit 20. The dimming control unit 80 is connected to the first signal V1 for dimming control. In addition, a system ground is connected to the flyback switch unit 20, the output filter unit 3, the feedback sampling unit 40, and the wafer control unit 5, while the other system is grounded to the reverse input rectification filter unit 10, the flyback switch unit 20, and the feedback sampling. The unit 40, the wafer control unit 5A, and the dimming control unit 80. 2 is a schematic diagram of a novel input rectification filtering unit, wherein the input rectification wave unit 10 includes a fuse FUSE, an input series resistor R1X, a varistor MOV, a common mode filter inductor L1, a pre-capacitor CX1, and a post-capacitor CX2. The rectifier bridge BD1 and the input filter capacitor C1. One end of the fuse FUSE is connected to the first AC terminal VAC+, and the other end of the fuse FUSE is connected to one end of the varistor MOV and one end of the pre-capacitor CX1. One end of the input series resistor R1X is connected to the second AC terminal VAC-, and the other end of the input series resistor R1X is connected to the other end of the EMI filter MOV and the other end of the pre-capacitor CX1. The front capacitor CX1 is connected in parallel to one side of the common mode filter inductor L1, and the rear capacitor CX2 is connected in parallel to the other side of the common mode filter inductor L1. The rectifier bridge BD1 includes a first diode DB1, a second diode DB2, a third diode DB3, and a fourth diode DB4, wherein the cathode of the first diode DB1 is connected to the second diode DB2. One end of the positive electrode and the rear-stage capacitor CX2, and the negative electrode of the third diode DB3 is connected to the positive terminal of the fourth 9 M414048 diode DB4 and the other end of the second-stage capacitor CX2, and the positive electrode of the first diode DB1, the second two The anode of the pole body DB3 and one end of the input filter capacitor ci are connected to the system ground, and the cathode of the second diode DB2 and the cathode of the fourth diode DB4 are connected to the first signal νι and the other end of the input filter capacitor C1. Referring to FIG. 3, FIG. 3 is a schematic diagram of a novel flyback switch unit, wherein the flyback switch unit 20 includes a flyback transformer T, a transistor Qi, and a sampling resistor RS, wherein the flyback transformer τ is connected to the first signal V; The three signals V3, the third auxiliary money ν3 γ, the fourth signal V4, the fifth signal V5, the system ground, and the other system are grounded, and the first side of the flyback transformer τ is connected to the first signal VI, the fourth number V4, the fifth > (Lv V5 and another system are grounded, and the second side of the flyback transformer τ is connected to the third signal V3, the third auxiliary signal V3Y, and the system ground. The f crystal Q1 is the MOSFET' and the gate of the transistor Q1 is connected. The fourth signal V4, the interpole of the transistor Q1 is connected to the ninth signal V9. The source of the transistor Q1 and one end of the sampling resistor RS are connected to the sixth signal v6, and the other end of the sampling resistor RS is connected to the system ground. 4 is a schematic diagram of the output chopper unit of the present invention, wherein the output tear wave unit 3〇 includes an output rectifying diode D3X, a first wave capacitor C3X, a current detecting resistor leg and a second filter capacitor C3Y′ and an output rectifying diode device Positive connection The three-signal V3, the negative pole of the output rectifying diode D3X, the end of the first-wave capacitor (10), and the end of the third air-capacitance capacitor C3Y are connected to the first DC output terminal v〇+ of the DC output power supply v〇, first The other end of the chopper capacitor C3X and the current detecting resistor (10) are connected to the system ground. The current detecting resistor R3X and the other end of the first wave capacitor C3Y are connected to the second DC output terminal VO· of the DC output power supply vq. In addition, the π-type filter circuit or the common mode filter circuit can be further added for different output ripple requirements. Referring to FIG. 5, FIG. 5 is a schematic diagram of a novel feedback sampling unit, wherein the feedback sampling unit 40 includes a feedback control chip UC. , smooth surface current limiting resistor RTL, light stripping component TL, first voltage dividing resistor R41, first knife resistor R42, first feedback resistor R43, first feedback capacitor (10), second feedback resistor R44, second feedback Capacitor (5), current limiting resistor R45, third filter capacitor (3) and emitter resistor R46. Feedback control chip uc has current control terminal ICTRL, electrical sensing terminal VSENSE, power input terminal vcc, power output terminal νουτ, ground terminal GN〇 And the voltage control terminal vctrl is used for sampling and controlling the voltage and current. One end of the M.414U46 R41 2 2 electric ί" is connected to the first DC wheel power supply _, and the first voltage dividing resistor is connected to the feedback control chip UC.戚VrTm3 (4) Known connection of the 3rd feedback-feedback capacitor C41=: The other end of the CdT=-_R43 a α υΓ The other end of the feedback valley C41 is connected to the feedback control Β The output terminal of the UC is VOUT The - terminal is connected to the voltage sensing terminal VSENSE of the feedback control chip Uc, the second chip uc is connected to the system ground. The second feedback resistor R44 is connected at the end-end feedback === terminal νουτ' the second-side connection of the second feedback resistor R44 The second end of the second feedback capacitor C42 is connected to the second DC output terminal V0- and the current control terminal ICTRL of the feedback control chip uc.
4蕾= TL包含光麵合電晶體及發光二極體，其中光輕合電晶體的 集電極連接集電極信號VC，光輕合電晶體的發射極以及發射極電阻R46 的=連接第七信號V7，發射極電阻R46的另—端連接系統接地，而發光 ΐ、的^極連接綠合㈣電阻RTL H綠合限流電阻RTL的另 -端以及第^驗電容C43的—端連接uc的電源輸入端 :CC’而第:遽波電容C43的另一端連接系統接地。發光二極體的負極、 ;慮波電# C41 @-端以及第二濾波電阻R44的一端連接回饋控制晶片 UC的㈣V〇UT。第二·電阻的另—端連接第二遽波電容 C42的^ ’而第一遽波電容C42的另一端連接回鑛控制晶片沉的電源 輸入端VCC以及第二直流輸出端v〇_。 參考圖6 ’圖6為本新型晶片控制單元的示意圖，其中晶片控制單元 5〇包括控制晶片m、電源濾波電容CV2、整流二極體〇了、感測_R5X、 感測電容C5X、第-電阻尺5卜第二電阻R52、第三電阻R53、第四電阻 R54、第五電阻R55、第六電阻R56以及比較電容C5Y。 控制晶片m為具有脈寬調制(PWM)功能的控制晶片，比如_3八或 類似功能的控制1C，其中控制晶片ui具有回饋端FB、比較端comp、多 工端MULT、感測端CS、電源端VCC、驅動端GATE、接地端GND以及 檢測端ZCD。 第一電阻R51的一端連接第一信號V1，第一電阻R51的另一端連接第 一電阻R52的一端以及控制晶片uj的多工端^感測電阻R5X的一 11 M414048 - 端連接第六信號v6，感測電阻R5X的另一端以及感測電容C5X的一端連 .接控制晶片U1的感測端CS，感測電容C5X的另一端連接另_系統接地。 控制晶片U1的電源端vcc連接集電極信號vc，控制晶片m的接地端 GND連接另一系統接地’控制晶片U1的驅動端GATE連接第八信號v8。 第六電阻R56的一端以及整流二極體〇丁的正極連接第五信號，第 六電阻R56的另一端連接控制晶片U1的檢測端ZCD，整流二^DT的 負極連接電源濾波電容CV2的一端，電源濾波電容CV2的另一端連接系統 接地。第三電阻R53的一端以及第四電阻R54的一端連接第七信號V7，而 第三，阻R53的另一端連接另一系統接地。第四電阻R54的另一端以及比 較電容C5Y的一端連接控制晶片U1的回饋端FB，而比較電容C5Y的另 • 一端連接第五電阻R55的一端，且第五電阻收的另-端連接控制晶片m 的比較端COMP。 因此，調整第二電阻R52可決定系統調光功能的輸出電流，同時第二 電阻R52 了選槪的並聯一顆電容濾波器，以避免某些情況下的干擾。檢 測端ZCD_^平的制以蚊每—個删週期的開始，保證所謂臨界 連續的工作模式。 參考圖7，圖7為本新型過沖吸收單元的示意圖，其中過沖吸收單元 60可包括穩壓二極體TVS，其中穩壓二極體TVS的正極連接第一信號νι 且穩壓二，體Tvs的負極連接第四信號V4 ;或可包括過沖吸收電阻r、過 ^ 冲及收電谷C以及過沖吸收二極體D，其牛過沖吸收電阻R的一端以及過 沖吸收，容C的一端連接第一信號VI，過沖吸收電阻R的另-端以及過沖 吸收電容C的另一端連接過沖吸收二極體D的負極，過沖吸收二極體D的 正極連接第四信號V4 ;或可包括穩壓二極體TVS以及過沖吸收二極體D， 其中穩壓_極體TVS的正極連接第一信號乂丨，穩壓二極體的負極連 接過冲吸收二極體D的負極，過沖吸收二極體D的正極連接第四信號v4 ; 或可包括穩壓二極體TVS、過沖吸收電阻R、過沖吸收電容c以及過沖吸 收-極體D ’其中穩壓二極體Tvs的正極、過沖吸收電阻r的一端以及過 沖吸收電谷c的-端連接第一信號V1，穩壓二極體Tvs的負極、過沖吸 收電阻R的另—端以及過沖吸收電容c的另一端連接過沖吸收二極體D的 負極’過沖吸收二極體D的正極連接第四信號;或可包括穩壓二極體 12 M414048 TVS、過沖吸收電阻R以及過沖吸收二極體D，其中穩壓二極體TVS的正 極以及過沖吸收電阻R的一端連接第一信號VI，穩壓二極體TVs的負極 以及過沖吸收電阻R的另一端連接過沖吸收二極體D的負極，過沖吸收二 極體D的正極連接第四信號V4 ;或可包括穩壓二極體tvS、過沖吸收電容 C以及過沖吸收二極體D，其中穩壓二極體TVS的正極以及過沖吸收電容 C的一端連接第一信號V1，穩壓二極體TVS的負極以及過沖吸收電容匸 的另一端連接過沖吸收二極體D的負極，過沖吸收二極體d的正極連接第 四信號V4 ;或可包括過沖吸收電阻R、過沖吸收電容c、另一過沖吸收電 阻R’以及過沖吸收二極體D，其中過沖吸收電阻r的一端以及過沖吸收電 容C的一端連接第一信號vi，過沖吸收電阻R的另一端以及過沖吸收電容 馨 C的另一端連接另一過沖吸收電阻R’的一端，另一過沖吸收電阻r,的另 一端連接過沖吸收二極體D的負極，過沖吸收二極體D的正極連接第四信 號V4 ;或可包括過沖吸收電阻R、過沖吸收電容c、另一過沖吸收電阻R， 以及過沖吸收二極體D，其中過沖吸收電阻r的—端以及過沖吸收電容c 的一端連接第一信號VI’過沖吸收電阻R的另一端以及過沖吸收電容匸的 另一端連接過沖吸收二極體D的負極，過沖吸收二極體D的正極連接另一 過沖吸收電阻R’的一端，另一過沖吸收電阻R，的另一端連接第四信號 V4。 參考圖8，圖8為本新型驅動單元的示意圖，其中驅動單元7〇可包括 驅動電風RG ’其中驅動電阻RG的一端連接第八信號V8，且驅動電阻RG 的另一端連接第九信號V9 ;或可包括驅動電阻RG、另一驅動電阻尺〇，以 及驅動二極體DG，其中驅動電阻RG的一端連接第八信號V8，且驅動電 阻RG的另-端連接第九信號V9，驅動二極體DG的負極連接第八信號 V8 ’驅動二極體DG的正極連接另-驅動電阻RG，的一端，另—驅動電阻 RG，的另一端連接第九信號V9;或可包括驅動電阻RG、另一驅動電阻rg， 以及驅動二極體DG ’其中驅動電阻RG的一端連接第八信號V8，動 電阻RG的另-端連接第九信號V9，另_驅動電阻RG，的一端連接第八信 號V8，另-驅動電阻RG，的另一端連接驅動二極體DG的負極，驅動二極 體DG的正極連接第九信號V9 ;或可包括驅動電阻RG以及驅動二極體 13 M414048 DG ’其中驅動電阻RG的-端以及驅動二極體DG的負極連接第八信號 V8’且驅動電阻RG的另一端以及驅動二極❹G的正極連接第九信號· 參考圖9 ’圖9為本新型調光控制單元的示意圖，其中調光控制單元 80包括第-調光電阻R8卜第二調光電j!且她、第三調光電阻R83、第四 調光電阻R84、第-調光電晶體Q81、第，光電晶體Q82、第—調光二極 體顧、第二調光二極體D82、第一調光電容⑶以及第二調光電容⑶， 且第-調光電晶體Q8丨為PNP電晶體，第二調光電晶體Q82為Μ〇·τ。 第-調光電阻R8!的-端連接第—信號％，第一調光電阻肌 =接第-調光二極體D81的正極、第二調光電阻_的一端以及第一調 2 的基極。第二調光電阻R82的另—端以及第— 的集電極連接另一系統接地。 ％ 調光二極體D81的負極連接第1光電晶體洲的發射極、第一 =谷Π二第二調光二極體D82的負極以及第二調光電晶_ 的閘極。第一調光電容C81的另一媸、笛_ , x w 一 知第二調光二極體D82的正極、第- 统接ΐ q及第四觀電阻财4的另—端連接另—系 電阻R83的一端連接第-信號νι，第三調光電二 3 - 調光電容C82的—端，而第二調光電容⑽的另—端連 擊電流。例如電當調光器開啟時瞬間輸入回路中的衝 二調光電晶體Q82的狀態為截1 ,===容=低電平1 此外，當調光器開啟-段時間德，笛it第調先電謂4被串在回路中。 和第-調光二極體D81而充電M調光電容C81經第—調光電阻R81 應第四調光電二4祐。2 r接調光電晶體Q82的狀態為開通，則對 上額外的功免系統伽 輪入電屋逐新下降，則當第-調光週期的後半周 低到:定程度時，第一調光電晶體Q81會導二3的轉 綠丘在下-個週期開始的時候，第二調光電晶_是處於截=。， M414048 熟悉本領域技術人員在不偏離如所附申請專利範圍書中所定義的本新 型範圍下，將會想到依據所顯示及說明的實施例而修改及改變。 【圖式簡單說明】 圖1是本新型實施例中返驰式可調光發光二極體驅動電路的示意圖； 圖2是本新型實施例中輸入整流濾波單元的示意圖； 圖3是本新型實施例中返驰開關單元的示意圖； 圖4是本新型實施例中輸出濾波單元的示意圖； 圖5是本新型實施例中回饋採樣單元的示意圖； 圖6是本新型實施例中晶片控制單元的示意圖； • 圖7是本新型實施例中過沖吸收單元的示意圖； 圖8是本新型實施例中驅動單元的示意圖；以及 圖9是本新型實施例中調光控制單元的示意圖。 【主要元件符號說明】 1 返驰式可調光發光二極體驅動電路 10 輸入整流濾波單元 20 返驰開關單元 30 輸出濾波單元 40 回饋採樣單元 50 晶片控制單元 60 過沖吸收單元 70 驅動單元 80 調光控制單元 154 蕾 = TL comprises a smooth surface combined transistor and a light emitting diode, wherein the collector of the light and light transistor is connected to the collector signal VC, the emitter of the light and light transistor and the emitter resistor R46 = the seventh signal V7, the other end of the emitter resistor R46 is connected to the grounding, and the illuminating ΐ, the ohmic connection is green (4), the other end of the RTL H green current limiting resistor RTL and the end of the first capacitor C43 are connected to the uc Power input: CC' and the other end of the chopper capacitor C43 is connected to the system ground. The negative electrode of the light-emitting diode, the waveguide C# @- terminal, and one end of the second filter resistor R44 are connected to the (four) V〇UT of the feedback control chip UC. The other end of the second resistor is connected to the second chopper capacitor C42 and the other end of the first chopper capacitor C42 is connected to the power supply input terminal VCC of the return control wafer sink and the second DC output terminal v〇_. 6 is a schematic diagram of a novel wafer control unit, wherein the wafer control unit 5 includes a control chip m, a power supply filter capacitor CV2, a rectifying diode, a sensing _R5X, a sensing capacitor C5X, a first- The resistor 5 is a second resistor R52, a third resistor R53, a fourth resistor R54, a fifth resistor R55, a sixth resistor R56, and a comparison capacitor C5Y. The control chip m is a control chip with a pulse width modulation (PWM) function, such as a control 1C of _3 or similar function, wherein the control chip ui has a feedback terminal FB, a comparison terminal comp, a multiplex terminal MULT, a sensing terminal CS, Power terminal VCC, driver terminal GATE, ground terminal GND, and detection terminal ZCD. One end of the first resistor R51 is connected to the first signal V1, and the other end of the first resistor R51 is connected to one end of the first resistor R52 and an 11 M414048 of the multiplexer sensing resistor R5X of the control chip uj is connected to the sixth signal v6. The other end of the sensing resistor R5X and one end of the sensing capacitor C5X are connected to the sensing terminal CS of the control chip U1, and the other end of the sensing capacitor C5X is connected to the other system ground. The power supply terminal vcc of the control chip U1 is connected to the collector signal vc, and the ground terminal GND of the control wafer m is connected to the other system ground. The drive terminal GATE of the control wafer U1 is connected to the eighth signal v8. One end of the sixth resistor R56 and the anode of the rectifying diode body are connected to the fifth signal, and the other end of the sixth resistor R56 is connected to the detecting end ZCD of the control wafer U1, and the negative terminal of the rectifying diode is connected to one end of the power supply filter capacitor CV2. The other end of the power filter capacitor CV2 is connected to the system ground. One end of the third resistor R53 and one end of the fourth resistor R54 are connected to the seventh signal V7, and third, the other end of the resistor R53 is connected to the other system ground. The other end of the fourth resistor R54 and one end of the comparison capacitor C5Y are connected to the feedback end FB of the control wafer U1, and the other end of the comparison capacitor C5Y is connected to one end of the fifth resistor R55, and the other end of the fifth resistor is connected to the control chip. The COMP of the comparison end of m. Therefore, adjusting the second resistor R52 determines the output current of the system dimming function, and the second resistor R52 selects a parallel capacitor filter in parallel to avoid interference in some cases. The detection end ZCD_^ is the beginning of each mosquito-cut cycle, ensuring a so-called critical continuous mode of operation. Referring to FIG. 7, FIG. 7 is a schematic diagram of a novel overshoot absorption unit, wherein the overshoot absorption unit 60 may include a regulated diode TVS, wherein the anode of the stabilized diode TVS is connected to the first signal νι and the voltage is stabilized. The negative electrode of the body Tvs is connected to the fourth signal V4; or may include an overshoot absorption resistor r, an overshoot and a charge valley C, and an overshoot absorption diode D, one end of the bull's overshoot absorption resistor R and an overshoot absorption, One end of the capacitor C is connected to the first signal VI, the other end of the overshoot absorption resistor R and the other end of the overshoot absorption capacitor C are connected to the negative pole of the over-absorption absorption diode D, and the positive connection of the over-absorption absorption diode D is Four signals V4; or may include a voltage stabilizing diode TVS and an overshoot absorbing diode D, wherein the positive pole of the voltage regulator _ polar body TVS is connected to the first signal 乂丨, and the negative pole of the voltage regulator diode is connected to the overshoot absorbing two The negative pole of the polar body D, the positive pole of the overshoot absorption diode D is connected to the fourth signal v4; or may include the voltage stabilizing diode TVS, the overshoot absorption resistor R, the overshoot absorption capacitor c, and the overshoot absorption-polar body D 'The positive pole of the regulated diode Tvs, one end of the overshoot absorption resistor r, and the overshoot absorption valley The end of c is connected to the first signal V1, the negative terminal of the voltage regulator diode Tvs, the other end of the overshoot absorption resistor R, and the other end of the overshoot absorption capacitor c are connected to the negative terminal of the overshoot absorption diode D. The positive electrode of the absorbing diode D is connected to the fourth signal; or may include the voltage stabilizing diode 12 M414048 TVS, the overshoot absorbing resistor R and the overshoot absorbing diode D, wherein the positive pole of the voltage stabilizing diode TVS and the overshoot One end of the absorption resistor R is connected to the first signal VI, and the other end of the voltage regulator diode TVs and the other end of the overshoot absorption resistor R are connected to the negative electrode of the absorption absorption diode D, and the positive connection of the overvoltage absorption diode D is Four signals V4; or may include a voltage regulator diode tvS, an overshoot absorption capacitor C, and an overshoot absorption diode D, wherein the anode of the Zener diode TVS and one end of the overshoot absorption capacitor C are connected to the first signal V1 The negative terminal of the stabilized voltage diode TVS and the other end of the overshoot absorption capacitor 连接 are connected to the negative electrode of the over-absorption absorption diode D, and the positive electrode of the over-absorption absorption diode d is connected to the fourth signal V4; or may include overshoot absorption Resistor R, overshoot absorption capacitor c, another overshoot absorption resistor R', and overshoot The diode D is received, wherein one end of the overshoot absorption resistor r and one end of the overshoot absorption capacitor C are connected to the first signal vi, and the other end of the overshoot absorption resistor R and the other end of the overshoot absorption capacitor C are connected to another One end of the absorption resistor R', the other end of the overshoot absorption resistor r, is connected to the negative electrode of the absorption absorption diode D, and the positive electrode of the over-absorption absorption diode D is connected to the fourth signal V4; or may include an overshoot The absorption resistor R, the overshoot absorption capacitor c, another overshoot absorption resistor R, and the overshoot absorption diode D, wherein the end of the overshoot absorption resistor r and the end of the overshoot absorption capacitor c are connected to the first signal VI' The other end of the overshoot absorption resistor R and the other end of the overshoot absorption capacitor 连接 are connected to the negative electrode of the absorption absorption diode D, and the positive electrode of the overshoot absorption diode D is connected to one end of the other overshoot absorption resistor R'. The other end of the overshoot absorbing resistor R is connected to the fourth signal V4. Referring to FIG. 8, FIG. 8 is a schematic diagram of a driving unit of the present invention, wherein the driving unit 7A may include a driving electric wind RG', wherein one end of the driving resistor RG is connected to the eighth signal V8, and the other end of the driving resistor RG is connected to the ninth signal V9. Or may include a driving resistor RG, another driving resistor 〇, and a driving diode DG, wherein one end of the driving resistor RG is connected to the eighth signal V8, and the other end of the driving resistor RG is connected to the ninth signal V9, driving two The anode of the polar body DG is connected to the eighth signal V8', the positive terminal of the driving diode DG is connected to the other end of the driving resistor RG, and the other end of the driving resistor RG is connected to the ninth signal V9; or the driving resistor RG may be included. The other driving resistor rg, and the driving diode DG', wherein one end of the driving resistor RG is connected to the eighth signal V8, the other end of the dynamic resistor RG is connected to the ninth signal V9, and the other end of the driving resistor RG is connected to the eighth signal. V8, the other end of the driving resistor RG, is connected to the negative pole of the driving diode DG, and the anode of the driving diode DG is connected to the ninth signal V9; or may include the driving resistor RG and the driving diode 13 M414048 DG 'where the driving resistance The RG terminal-end and the negative electrode of the driving diode DG are connected to the eighth signal V8' and the other end of the driving resistor RG and the positive electrode of the driving diode GP are connected to the ninth signal. Referring to FIG. 9, FIG. 9 is a novel dimming control unit. Schematic diagram, wherein the dimming control unit 80 includes a first dimming resistor R8, a second dimming j! and her, a third dimming resistor R83, a fourth dimming resistor R84, a dimming crystal Q81, a photoelectric a crystal Q82, a first dimming diode, a second dimming diode D82, a first dimming capacitor (3), and a second dimming capacitor (3), and the first dimming crystal Q8 is a PNP transistor, and a second The photomodulation crystal Q82 is Μ〇·τ. The - terminal of the first dimming resistor R8! is connected to the first signal %, and the first dimming resistor muscle is connected to the positive electrode of the first dimming diode D81, one end of the second dimming resistor _, and the base of the first dimming resistor pole. The other end of the second dimming resistor R82 and the collector of the first are connected to the other system to be grounded. The negative electrode of the dimming diode D81 is connected to the emitter of the first photoelectric crystal, the negative electrode of the first = valley 2 second dimming diode D82, and the gate of the second dimming crystal. The other dimming capacitor C81, flute _, xw knows the positive pole of the second dimming diode D82, the first connection ΐ q and the fourth end of the resistance 4 One end of the R83 is connected to the -signal νι, the third dimming photo 2 - the end of the dimming capacitor C82, and the other end of the second dimming capacitor (10) is connected to the current. For example, when the dimmer is turned on, the state of the dimming photodiode Q82 in the instantaneous input loop is cut, 1 ===capacity = low level 1. In addition, when the dimmer is turned on - the period of time, the flute is adjusted The first electricity is said to be 4 in the loop. And the first-dimming diode D81 and the charging M dimming capacitor C81 through the first-dimming resistor R81 should be the fourth to adjust the photoelectric two. When the state of the 2 r-connected photo-electric crystal Q82 is turned on, the additional power-free system gamma-input is newly decreased, and when the second half of the first dimming period is low: the first dimming crystal Q81 will lead the turn of the green hills of the second 3 at the beginning of the next cycle, the second tone photoelectric crystal _ is at the cut =. Modifications and alterations in accordance with the embodiments shown and described herein will be apparent to those skilled in the art. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a flyback type dimmable light emitting diode driving circuit in the present embodiment; FIG. 2 is a schematic diagram of an input rectifying and filtering unit in the present embodiment; FIG. FIG. 4 is a schematic diagram of an output filtering unit in the new embodiment; FIG. 5 is a schematic diagram of a feedback sampling unit in the new embodiment; FIG. 6 is a schematic diagram of a wafer control unit in the new embodiment; Figure 7 is a schematic view of an overshoot absorption unit in the present embodiment; Figure 8 is a schematic view of a drive unit in the present embodiment; and Figure 9 is a schematic view of a dimming control unit in the present embodiment. [Main component symbol description] 1 flyback type dimmable light emitting diode driving circuit 10 input rectifying and filtering unit 20 flyback switching unit 30 output filtering unit 40 feedback sampling unit 50 wafer control unit 60 overshoot absorption unit 70 drive unit 80 Dimming control unit 15