201215228 六、發明說明： 【發明所屬之技術領域】 本發明係有關一種發光驅動電路，更明確地說，係有關一種具有 動態性負載與提升功率因素(power factor)之發光驅動電路。 【先前技術】 鲁 於先前技術中，當使用一交流電源來作為一發光負載之電源時， 發光驅動電路需要透過一調光電路來調整發光負載發光的亮度。發 光負載，舉例來說，可為複數個串接的發光二極體(LightEmitting Diode, LED) 〇 在調光電路的設計中，皆會設置一雙向交流觸發三極體(tHac)。 請參考第1圖。第1圖係為說明一雙向交流觸發三極體之電流·電壓 特性之示意圖。在第i圖中，Id代表雙向交流觸發三鋪之電流、 鲁Vd代表雙向交流觸發三極體之電壓。因此，由第i圖可看出，雙向 交流觸發三極體之特性係在於導通之後需要持續被供給一維持電流 _ding 以維持該雙向交流觸發三極體的狀態。換句話說， 调光電路需要持續被供給維持電流，以維持運作。然而，當交流電 能經過整流H整流之後職生的雜，若低於發⑽縣體的順向 電壓時法使該發光貞載發光，導致無電流產生而無法提供維 .持電祕調光電路峨魏巾的雙向交_發三鋪），如此造成 調光電路無法運作。因此錢前技術的發光轉電軸，會於整流 201215228 器的輸出端設置一固定的假負載(dummy load)，以使發光驅動電路 於發光負載未能汲取電流時，或者根本沒有設置發光負載時，能持 續提供維持電流給調光電路(調光電路中的雙向交流觸發三極體）。 然而，該假負載會持續耗損交流電源所提供的電能，產生不必要的 浪費，造成使用者的不便。 【發明内容】 本發明提供-種具有動態性負載與提升功率因素之發光驅動電 路。該發光驅動電_來透過—調光電路，接收-交流電源所提供 之-乂流電壓，以驅動—發光負載。該誠電路时控制該交流電 源是否祕發光驅動，以控繼交流電__交流電壓 給該發光驅動電路之時機，來調整該發光負載之亮度。騎光驅動 電路包含-整流器、_動態負載模組，以及—電源轉換電路。該整 "IL器用來整流該交流電騎提供之敍流電壓，以產生一輸入電 壓。該整流器具有-第_輪入端、—第二輸人端、—第一輸出端， 以及▲-第二輸出端。該整流器之該第—輸人端與該第二輸入端用來 2敍流電源所提供之該交流。該整流器之該第—輸出端與 “ -輸出制來產生該輪出職。該動態負植組包含一動態負 = 控制電路’以及-波谷電壓補償電路。該動態負載電路 Μ第—負載電阻’以及—Μ。該第—負載電阻具有-第—端 糾=整流器之該第一輪出端以及-第二端。該開_於該第 第二_之間。該控制電 、亥輸入電壓之一偵測電壓之電位小於一預設電位 201215228 二二二?“將該第—負載電P且之該第二端搞接至該整流器 之5亥第一輸出如。該波谷電壓補償電路包含一第一電六一201215228 VI. Description of the Invention: [Technical Field] The present invention relates to an illumination driving circuit, and more particularly to an illumination driving circuit having a dynamic load and a power factor. [Prior Art] In the prior art, when an AC power source is used as a power source for a light-emitting load, the light-emitting drive circuit needs to adjust the brightness of the light-emitting load through a dimming circuit. The illuminating load, for example, can be a plurality of series connected Light Emitting Diodes (LEDs). In the design of the dimming circuit, a bidirectional AC triac (tHac) is provided. Please refer to Figure 1. Fig. 1 is a schematic view showing the current/voltage characteristics of a bidirectional AC-triggered triode. In the i-th figure, Id represents the current of the two-way AC-triggered three-ply, and Lu Vd represents the voltage of the bi-directional AC-triggered triode. Therefore, as can be seen from the figure i, the bidirectional AC triac is characterized in that it needs to be continuously supplied with a sustain current _ding to maintain the state of the bidirectional AC triac. In other words, the dimming circuit needs to be continuously supplied with a holding current to maintain operation. However, when the alternating current energy is rectified by the rectification H, the miscellaneous life is lower than the forward voltage of the (10) county body, so that the illuminating illuminator emits light, resulting in no current generation and unable to provide a dimension.双向Wei towel's two-way intersection _ hair three shop), this caused the dimming circuit to not work. Therefore, the front-end technology of the illuminating electric shaft will set a fixed dummy load at the output of the rectification 201215228, so that the illuminating drive circuit fails to draw current when the illuminating load fails, or when no illuminating load is set at all. The sustain current can be continuously supplied to the dimming circuit (the bidirectional AC trigger triode in the dimming circuit). However, the dummy load will continue to consume the power provided by the AC power source, resulting in unnecessary waste and causing inconvenience to the user. SUMMARY OF THE INVENTION The present invention provides an illumination driving circuit having a dynamic load and a power boosting factor. The illuminating drive electrically transmits a turbulent voltage supplied by the ac voltage to drive the illuminating load. The circuit controls whether the AC power source is driven by the light source to control the timing of the AC power__AC voltage to the light-emitting drive circuit to adjust the brightness of the light-emitting load. The rider drive circuit includes a rectifier, a dynamic load module, and a power conversion circuit. The whole "IL device is used to rectify the shunt voltage provided by the AC ride to generate an input voltage. The rectifier has a -th wheel input end, a second input end, a first output end, and a ▲-second output end. The first input terminal and the second input terminal of the rectifier are used to describe the communication provided by the power source. The first output terminal of the rectifier is combined with the "-output system to generate the wheel. The dynamic load group includes a dynamic negative = control circuit" and a valley voltage compensation circuit. The dynamic load circuit Μ first - load resistance And - the first load resistor has a - first end correction = the first round of the rectifier and the second end. The opening - between the second _. The control electric, the input voltage of the The potential of a detecting voltage is less than a predetermined potential 201215228 222? "The first-stage load P and the second end are connected to the first output of the rectifier. The valley voltage compensation circuit includes a first electric six-one
極體、一第二二極體、一第三二極體，以及一第二電::：第= 谷具有-第-端透過該動態負載電路叫接至該整流器之該第一輸 以及-第二端用來產生比例於該輪入電壓之職測電壓。該 第--極體具有-負端_至該第_電容之該第二端，以及一正端 =至=流=該第二輸出端。該第二二極體具有-正端輕接至 ’以及一負端。該第三二極體具有， 接至雜-電谷之該第—端，以及—正端雛至該第二二極體之該 負端。該第二電容具有—第—端耦接至該第二二極體之該負端，以 及-第二端雛至該整流器之該第二輸出端。該電源轉換電_接 於該波谷電壓補償電路與該發光負載之間。該電_換電路用來依 據4波合電壓補償電路補償過後之輸人電壓，以驅動該發光負載。 本《月提供種動態負載模組。該動態負^<勸且應用於一發光驅 動電路。該發光驅動電路用來透過—調光電路，接收—交流電源所 提供之-交流f壓，轉動—發光貞載。棚光電_來控繼交 流電源是否耦接域發光驅純路，啸綱技電源提供該交流 電壓給該發光驅動電路之時機，來調整該發光負載之亮度。該發光 驅動電路具有-整流!！ m轉換電路。該整流器用來整流 該交流電_提供之該交流賴，以產生___輸人電壓。該整流器具 有一第一輸入端、一第二輪入端、一第一輸出端，以及一第二輸出 端。該整流器之該第一輸入端與該第二輸入端用來接收該交流電源 201215228 之電壓。該整流11之該第—輸出端與該第二輸出端用 該輪出電壓。該電源轉換電路用來依據該輸入電壓，驅動該 °亥動態負載模組耦接於該電源轉換電路與該整流器之 二ί動負載模組包含一動態負載電路、-控制電路，以及-波 ^㈣償電路。該動態負載電路包含—第一負載電阻，以及一開 以及j ΐ魏阻具有―第―端_至錄流11之該第一輸出端 考夕妨^端°《_墟㈣第—貞m電阻之該第二端與該整流 : 輸之間。趣制電路用來當比例於該輸人電壓之一 雷測電壓之電位小於i設躲時，p姐細關，以_第一負載 電至該ί流器之該第二輸出端。該波谷電壓補償 :路包::第:電容、一第一二極體、一第二二極體、一第三二極 路以耦接至戎第一電容具有一第一端透過該動態負載電 之該第—輸出端，以及-第二端用來產生比例 於該輸入健之該伽㈣。1J ―雷六夕㈣-電壓第—二極體具有一負端輕接至該第 該第二二3 ’以及—正端_至該整流11之該第二輸出端。 山第--極體具有-正端_至該第—電容之該第二端，以及 三二極體具有—負端输至該第—電容之該第—端與該電 2轉換電路，以及-正端_至該第二二極體之該負端。該第二電 各具有-第-端耦接至該第二二極體之該負端，以及—第二端耗接 至該整流器之該第二輸出端與該電源轉換電路。 【實施方式】 請參考第2圖。第2圖係為本發明之具有動態性負載與提升功率 201215228 因素之發光驅動電路200之示意圖。 U刘弟2圖所不，交流電源110 包含二輸出端〇丨與〇2，以輸 囬乂爪電此。發光驅動電路200透過 接收交流電源U〇所提供之交流電壓〜一 負載40,其中發光負载14〇可由複數個串接的發光二鋪來實 施0 調光電路可藉由控制交流電源11〇是否輕接至發光驅動電路 籲·’以控制交流電源110提供交流電壓I給發光驅動電路· 匕寺機來達到5周整發光負載⑽的亮度的目的。調光電路的結構 與工作原理為業界所習知的技術，在第2圖中所示的調光電路別 僅為其中-種實施例，並非限定本發明之範鳴。於第2圖中，交流 f源110提供父流電能給調光電路13〇 ;調光電路㈣再將調整過 後的父流電能提供給本發明之發光驅動電路200。調光電路130調 整交流電能輸人至發光驅動電路珊之責任週期，以據以調整發光 負載140的亮度。調光電路13〇包含電容c3、Q、一電感Li、可變 •電阻Rx、雙向交流觸發二極體_舰〇以及雙向交流觸發三極體 (triac)Xi。可變電阻]^與電容C4控制雙向交流觸發三極體&的導 通角度(firing angle)。雙向交流觸發二極體Dl〇用來將交流輸入電壓 於正負週期的導通角度的對稱性最大化。電容c3與電感Li形成一 低通遽波器以降低雜訊。雙向交流觸發三極體Χι係可視為一開關裝 置專效於兩個反相並聯的石夕控整流器(Silic〇n Controlled Rectifier， SCR) ’並共用一閘極g!。矽控整流器係為一閘極控制元件，於導通 時可視為一二極體。閘極訊號8<31用來導通該矽控整流器，而於導 201215228 通後之電流即用來維持該石夕控整流器導通。因此，該問極訊號& 無法直接將該石夕控整流器關閉，而是直到負載電流下降至零時，該 石夕控整流n才會_。雙向交_發三極體Χι _ __控整流 器但其負魏財向可錢向，且料猶界胁正她負相狀態 :係為相異’而該差異可由雙向交流觸發二極體d⑽接至該雙向 =流觸發三極體Xl之_ Gi讀料通賴，進而最小化。雙向 『流觸發三極體Xl具有—最小栓鎖電流(latehinge_⑽一最小 2持電流(_心_岭栓鎖電流係為當給定—足_閘極脈衝 雙衫_發三極體Xl所要求之最小魏；維㈣流係為維 ^雙向父、發三極體Χι於導通時所要求之最小電流。當電流低 持、持電流時’雙向交流觸發三極體Χι _。检鎖魏通常大於維 的電流°因此’如前所述，當交流電驗過整流H整流之後所產生 备^壓’若低於波谷電壓補償電路230的電壓時，則無法使該發光 打、發光’導致無電流產生而無法提供維持電流給雙向交流觸 顿體X,。 發光驅動電路200包含一整流器21〇、一動態負載模組，以 及一電源轉換電路250。 整流器210用來整流交流電源110所提供之交流電壓VAC，以產 〜輪入電壓〜。整流器21〇包含輸入端L與i2，以及輸出端& 〇4。整流S 210之輪入端L與〗2接收交流電源則所提供之電壓 AC。整流器210之輸出端〇3與〇4產生輸出電壓％。整流器加 201215228 的結構與工作原理為業界所習知的技術，在第2圖中，以二極體d!、 I)2、D3與D4所實施之全波形橋式整流器僅為整流器21〇其中的一 種實施例，並非限定本發明之範疇，且本發明中的整流器21〇也不 限定為全波形橋式整流器。 電源轉換電路250搞接於波谷電壓補償電路230與發光負載mo 之間，用來將輸出電壓V〇或輸出電流1〇轉換為較適合發光負載14〇 鲁所使㈣範圍。舉例來說，電源轉換電路⑽可為—降壓電路或為 定電流輸出電路。 動態負載模組260包含一動態負載電路22〇、一控制電路27〇、 1電流防止電路280、-電壓箝制電路，以及—波谷電壓補償 電路(valley-v〇ltage fining circuit)23〇。a pole body, a second diode, a third diode, and a second electric::: the first valley has a - the first end is connected to the first transmission of the rectifier through the dynamic load circuit and - The second end is used to generate a voltage test voltage proportional to the turn-in voltage. The first pole body has a negative terminal _ to the second end of the _ capacitor, and a positive terminal = to = flow = the second output terminal. The second diode has a - positive end lighted to ' and a negative end. The third diode has a first end connected to the hetero-electric valley, and a positive end to the negative end of the second diode. The second capacitor has a first end coupled to the negative end of the second diode and a second end coupled to the second output of the rectifier. The power conversion circuit is connected between the valley voltage compensation circuit and the light-emitting load. The electric_changing circuit is used to compensate the input voltage according to the 4-wave voltage compensation circuit to drive the luminous load. This month provides a dynamic load module. The dynamic negative is applied to an illumination driving circuit. The illuminating driving circuit is used for transmitting the ac voltage, and rotating-lighting the susceptor through the dimming circuit. The shed photoelectric_to control whether the AC power is coupled to the domain illuminator pure road, the whispering power supply provides the AC voltage to the timing of the illuminating drive circuit to adjust the brightness of the illuminating load. The illuminating drive circuit has - rectification!! m conversion circuit. The rectifier is used to rectify the alternating current provided by the alternating current to generate a ___ input voltage. The rectifier has a first input, a second turn-in end, a first output, and a second output. The first input and the second input of the rectifier are configured to receive the voltage of the AC power supply 201215228. The first output terminal of the rectification 11 and the second output terminal use the wheel voltage. The power conversion circuit is configured to drive the dynamic load module coupled to the power conversion circuit and the rectifier according to the input voltage, and the dynamic load circuit includes a dynamic load circuit, a control circuit, and a wave. (4) Reimbursement of the circuit. The dynamic load circuit includes a first load resistor, and an open and j ΐ Wei resistance having a “first end” to the first output end of the recording stream 11 考 妨 端 end ° “_ ( (4) 贞 电阻 resistance The second end is between the rectification and the input. The fun circuit is used to be proportional to one of the input voltages. When the potential of the lightning voltage is less than i, the p-sister is finely closed, and the first load is connected to the second output of the streamer. The valley voltage compensation: a circuit pack:: a capacitor, a first diode, a second diode, and a third diode to be coupled to the first capacitor and having a first end to transmit the dynamic load The first output terminal and the second terminal are used to generate the gamma (four) proportional to the input. The 1J-Raytheon (4)-voltage first-diode has a negative terminal lightly connected to the second second 3' and the positive terminal to the second output of the rectifier 11. The second phase of the mountain has a positive terminal _ to the second end of the first capacitor, and the third diode has a negative terminal connected to the first terminal of the first capacitor and the electric 2 conversion circuit, and - positive terminal _ to the negative terminal of the second diode. The second power has a -th terminal coupled to the negative terminal of the second diode, and a second terminal is coupled to the second output of the rectifier and the power conversion circuit. [Embodiment] Please refer to Figure 2. Figure 2 is a schematic diagram of the illumination driving circuit 200 having the dynamic load and the boosting power 201215228 of the present invention. U Liu Di 2, the AC power supply 110 contains two output terminals 〇 and 〇 2 to return the claws. The illuminating driving circuit 200 transmits the AC voltage provided by the AC power source U 〜 to a load 40, wherein the illuminating load 14 〇 can be implemented by a plurality of serially connected illuminating devices. 0 The dimming circuit can be controlled by controlling the AC power source 11 〇 Connected to the illuminating drive circuit ??? 'to control the AC power supply 110 to provide the AC voltage I to the illuminating drive circuit · 匕 机 machine to achieve the brightness of the entire luminous load (10) for 5 weeks. The structure and operation principle of the dimming circuit are well known in the art, and the dimming circuit shown in Fig. 2 is merely one of the embodiments, and does not limit the invention. In Fig. 2, the AC f source 110 provides the parental power to the dimming circuit 13A; the dimming circuit (4) provides the adjusted parent current to the illumination driving circuit 200 of the present invention. The dimming circuit 130 adjusts the duty cycle of the AC power input to the illumination driver circuit to adjust the brightness of the illumination load 140. The dimming circuit 13A includes capacitors c3, Q, an inductor Li, a variable resistor Rx, a bidirectional AC trigger diode _ship, and a bidirectional AC triac Xi. The variable resistor]^ and the capacitor C4 control the bidirectional AC trigger triode & the firing angle. The bidirectional AC trigger diode D1〇 is used to maximize the symmetry of the conduction angle of the AC input voltage during positive and negative periods. Capacitor c3 and inductor Li form a low pass chopper to reduce noise. The bidirectional AC-triggered triode Χι can be regarded as a switching device that is dedicated to two inverted parallel-connected Silic〇n Controlled Rectifiers (SCRs) and shares a gate g!. The 矽 control rectifier is a gate control element that can be considered a diode when turned on. The gate signal 8 < 31 is used to turn on the step-controlled rectifier, and the current after the 201215228 is used to maintain the turn-on rectifier. Therefore, the pole signal & cannot directly turn off the rock-controlled rectifier, but until the load current drops to zero, the stone-controlled rectifier will be _. Two-way cross _ hair triode Χ ι _ __ control rectifier but its negative Wei Cai can be money, and the material is threatening her negative phase: the system is different 'and the difference can be triggered by two-way AC diode d (10) Connected to the bidirectional = stream trigger triode Xl _ Gi read material pass, and thus minimized. Two-way "flow trigger triode Xl has - minimum latching current (lateningge_(10) - minimum 2 holding current (_ heart _ ling bolt lock current system is given when - foot _ gate pulse double shirt _ hair triode Xl required The minimum Wei; the dimension (four) flow system is the minimum current required for the dimensioning of the two-way parent and the triad body. When the current is low and the current is held, the two-way AC trigger triode Χι _. The current is greater than the dimension. Therefore, as described above, when the AC voltage is lower than the voltage of the valley voltage compensation circuit 230 after the rectification of the rectification H, the illuminating light cannot be caused to emit light, resulting in no current. The generator circuit 200 includes a rectifier 21〇, a dynamic load module, and a power conversion circuit 250. The rectifier 210 is used to rectify the AC provided by the AC power source 110. The voltage VAC is generated by the round-up voltage. The rectifier 21〇 includes the input terminals L and i2, and the output terminals & 〇 4. The voltage input AC is supplied to the AC input terminal of the rectifier S 210. Output of rectifier 210 〇3 and 〇4 produce output voltage %. The structure and working principle of rectifier plus 201215228 are well-known technologies in the industry. In the second figure, the implementation of diodes d!, I)2, D3 and D4 The waveform bridge rectifier is only one embodiment of the rectifier 21, and does not limit the scope of the present invention, and the rectifier 21〇 in the present invention is not limited to a full-wave bridge rectifier. The power conversion circuit 250 is connected to the valley voltage compensation. The circuit 230 and the illuminating load mo are used to convert the output voltage V 〇 or the output current 〇 to a range suitable for the illuminating load 14 . For example, the power conversion circuit ( 10 ) may be a step-down circuit or The dynamic load module 260 includes a dynamic load circuit 22, a control circuit 27, a current prevention circuit 280, a voltage clamping circuit, and a valley-voltage compensation circuit (valley-v〇ltage fining circuit). ) 23〇.
21〇整流之後，輸入電壓Vjn 。以下將說明波谷電壓補償電 圖。如第3圖所示，經過橋式整流器2 之波形便形成如第3圖中之弦波波形。 路230之工作原理。 IN。輸入電壓VlN在經過 波谷電壓補償電路23〇接收輸入電壓 201215228 ^谷電壓麵電路，的補償之後，成為輸出· %。請_ 第3圖。假設電容Cl與Q之容值相等。波谷電壓麵電路挪^ 運作可分為下列三個階段： 階段 1: 階段 2: V(cl+C2)>VlN>V(cl 丨丨 C2); 階段 3 : v(ei||e2)>ViN ; c . v(C1+C2)^t^ 效之_、W2)表示電^糾並聯時等效 23〇1/雷第4圖係為說明於階段1時波谷電壓補償電路 不意圖。於階段1時(VlN>V_))(高角度），全波 提=::Γ10所輸出的電能會對電容Cl與。進行充電，同時 ===以發光。舉例來說，若_壓After 21 〇 rectification, the input voltage Vjn is input. The valley voltage compensation chart will be explained below. As shown in Fig. 3, the waveform of the bridge rectifier 2 forms a sine wave waveform as shown in Fig. 3. The working principle of the road 230. IN. The input voltage V1N becomes the output % after being compensated by the valley voltage compensation circuit 23 〇 receiving the input voltage 201215228 ^ valley voltage surface circuit. Please _ Figure 3. Assume that the capacitances of Cl and Q are equal. The operation of the valley voltage surface circuit can be divided into the following three phases: Phase 1: Phase 2: V(cl+C2)>VlN>V(cl 丨丨C2); Phase 3: v(ei||e2)> ;ViN ; c . v ( C1 + C2 ) ^ t ^ effect _ , W2 ) means that the equivalent of 23 〇 1 / Ray 4 when the parallel connection is shown in the phase 1 is not intended to be the valley voltage compensation circuit. At stage 1 (VlN > V_)) (high angle), the full wave ==: Γ10 output power will be the capacitance Cl. Charge and === to illuminate. For example, if _ pressure
>v _ 1、2刀別跨有5伏特的電壓，意即Vn^O ☆ ^ΓΓ5^，’則編彡橋式紐1121G騎出之電能會對電 合卜、2、仃充電，同時輸出電能給發光負載140。 23〇 圖係為說明於階段2時波谷電壓補償電路 波形St::時(一 光負載M0以發光。舉㈣輪出的電能僅提供為輸出電流1〇給發 盥c八5；_ 舉例來說，若輸人電壓Vin為7伏特、電容Cl 與C2刀別跨有5伏特的，意即W),>Vin=7> 12 201215228 V(叫丨ο) 5 ’則全波形橋式整流器⑽所輸出之電能僅提供為輪出電 流I。給發光負载140以發光，而電容心私既不充電也不放電。 ❼考第6 11。第6圖係為說明於階段3時波谷電壓補償電路 230 進彳_之_^_ 時(v(ei||G2)>VrN)(鋪度），電容 1 /、2進行放電而提升輸出電壓V。並提供輸出電流L給發 】4〇以發光。舉例來說，若輸人電壓Vjn為3伏特、電容q愈a 賴跨有5伏特的電壓，意即v_)=5>Vin=3，則電容c :=透過二極體〇7與〇9放電以作為輸出電流1〇_ 發光。 的放雷，^知’藉由在輸入電壓VlN在低角度時利用電容Cl與C2 波穴補^ W有效翻輸人龍VlN於波谷時的賴，而產生經過 波。補仏後的輸出電壓V〇。 7圖t為說明經過本發_ 部分)將不會有如社°^^圖°如第7 _*，輸出賴V〇(實線 的情況。 ’'⑥入電壓VlN在低角度時電位極低(虛線部分） 負載電阻，在_獅MW ’ _編路220 Μ 阻R3與1;電二及，S:1。控制電路270包含-提升電 心’以及一電晶體q2。開關sw!可利用一電晶 13 201215228 體Q,實現，在第2圖中以電晶體Qi為N通道金氧半賴π ch_d Metal Oxide Semiconductor，NM〇S)電晶體來作舉例說明，且電晶體 Q2以一(NPN)雙載子接面電晶體(Bip〇lar Juncd〇n τ麵ist〇r，_來 實施。負載電阻R,搞接於整流器210之輸出端〇3與電晶體a之第 一端(汲極)之間；電晶體Q丨之第二端(源極你接於整流器21〇之輸 出端〇4、其控制端(閘極)搞接於電晶體QA第一端(集極）；電晶體 (¾之第二端(射極)耦接於整流器210之輸出端〇4、其第一端(集極） 耦接於提升電阻&、其控制端(基極)耦接於限流電阻^。 在動態負載模組260中，控制電路270肖來控制動態負載電路 220於輸入電壓Vjn處於低電位時，將負載電阻Ri耦接至整流器 210，以讓交流電源no可產生一維持電流讓調光電路13〇維持運 作，且控制動態負載電路220於輸入電壓VlN處於高電位時，移除 負載電阻Ri ’以節省電能。以下將說明控制電路270控制動態負載 電路220之工作原理。於下列說明時，由於負載電阻&遠大於負載 電阻R, ’因此可假設負載電阻r2不存在。>v _ 1, 2 knives across a voltage of 5 volts, meaning Vn ^ O ☆ ^ ΓΓ 5 ^, 'When the bridge type New Zealand 1121G riding power will charge the electricity, 2, 仃 charging, at the same time The electrical energy is output to the illuminating load 140. The diagram is shown in Figure 2 when the valley voltage compensation circuit waveform St:: (a light load M0 to illuminate. The power of the (4) wheel is only provided as the output current 1 〇 to the 盥c 八5; _ Say, if the input voltage Vin is 7 volts, the capacitance Cl and C2 are 5 volts across, that is, W), >Vin=7> 12 201215228 V(called 丨ο) 5 'The full-wave bridge rectifier (10) The outputted electrical energy is only provided as the wheeling current I. The illuminating load 140 is illuminated to emit light, and the capacitor is neither charged nor discharged. Refer to page 6 11. Figure 6 is a diagram illustrating the phase-to-valley voltage compensation circuit 230 when ____ (v(ei||G2)>VrN) (batt), and the capacitors 1 /, 2 are discharged to increase the output. Voltage V. And provide the output current L to send 〇 4 〇 to illuminate. For example, if the input voltage Vjn is 3 volts and the capacitance q is a voltage of 5 volts across, that is, v_)=5>Vin=3, then the capacitance c:= is transmitted through the diodes 〇7 and 〇9. The discharge is illuminated as an output current of 1 〇 _. The demining, ^ knows by generating a passing wave when the input voltage VlN is at a low angle by using the capacitance Cl and the C2 hole to compensate for the effective conversion of the human VlN in the trough. The output voltage V〇 after the compensation. 7 Figure t is a description of the _ part) will not have such a ° ° ^ ^ map ° such as the 7th _ *, the output 赖 V 〇 (solid line situation. ''6 into the voltage VlN at low angles, the potential is very low (dotted line part) load resistance, in _ lion MW ' _ circuit 220 Μ resistance R3 and 1; electric two and S: 1. Control circuit 270 includes - boost core 'and a transistor q2. Switch sw! available An electro-crystal 13 201215228 body Q, realized, in the second figure, the transistor Qi is an N-channel gold oxide π ch_d Metal Oxide Semiconductor, NM〇S) transistor for illustration, and the transistor Q2 is one ( NPN) Bi-carrier junction transistor (Bip〇lar Juncd〇n τ surface ist〇r, _ is implemented. The load resistor R is connected to the output terminal 整流3 of the rectifier 210 and the first end of the transistor a (汲Between the poles; the second end of the transistor Q丨 (the source is connected to the output terminal 〇4 of the rectifier 21〇, and its control terminal (gate) is connected to the first end (collector) of the transistor QA; The second end (emitter) of the crystal (3⁄4) is coupled to the output terminal 〇4 of the rectifier 210, the first end (collector) of the transistor is coupled to the boosting resistor & the control terminal (base) is coupled to the current limiting Resistance ^. In dynamic load In the group 260, the control circuit 270 controls the dynamic load circuit 220 to couple the load resistor Ri to the rectifier 210 when the input voltage Vjn is at a low potential, so that the AC power supply no can generate a sustain current for the dimming circuit 13 to maintain. Operating, and controlling the dynamic load circuit 220 to remove the load resistor Ri' to save power when the input voltage VlN is at a high potential. The control circuit 270 controls the operation of the dynamic load circuit 220. The following description, due to the load resistance & is much larger than the load resistance R, 'so it can be assumed that the load resistor r2 does not exist.
在動態負載模組260中’波谷電壓補償電路230除了用來補償輪 入電壓乂取外，還透過電容c〗之第二端偵測電壓Vdet給控制電路 270。偵測電壓Vdet之波形如第8圖所示。此外，為了方便說明， 在第8圖所示之偵測電壓VDET之波形中，係不考慮二極體D D 8 與Dg之導通電壓。由於輸出電壓V〇為波谷電壓補償電路23〇補償 輸入電壓之波谷所產生之電壓，且由第8圖可看出，偵測電壓 14 201215228 vDET比例於輸出電壓v〇(偵測電壓Vdet之峰值為電壓之峰值 VPEAK的一半）’因此偵測電壓vDET大致比例於輸入電壓。換句 話說，波谷電壓補償電路230提供一比例於輸入電壓VIN之偵測電 壓VDET給控制電路270。 當比例於輸入電壓Vin之偵測電壓VDET之電位高於一預設電位 VPRE時，控制電路270關閉開關SWi，如此，負載電阻&處於浮 接狀態；當_於輸人電壓Vin之偵測電壓Vdet之電位小於預設電 位vPRE時’控制電路270開啟開關SWi，以將負載電阻心之第二 端透過開關sWl _至整流器21G之輸出端〇4。更明確地說，當輸 八電壓ViN位於中角度與高角度時，此時偵測電壓高於電晶體 Q2之臨界電壓VTH(在本實蝴巾，預設電位VpR£特電㉟體仏之 臨界電壓VTH之電位）’而使得電晶體&導通。如此，電晶體α之 控制端(閘極)被電晶體卩2拉至低電位，進而使得電晶體關閉。 因此，此時負載電阻&處於浮接狀態，而不會提供負載，亦不會消 耗任何電能。反之’當輸人電壓Vin位於低角度時，比例於輸入電 壓vIN之制電壓Vdet不足以導通電晶體，因此，電晶體仏關 閉。如此一來，電晶體之控制端(閘極)便可被輸入電壓V取，透 過提升電阻R3 ’提升至高電位，進而使得電晶體Qi開啟。因此， 此時負載電阻R,透過電晶體Qi織至輯，而提供貞載以讓交流 電源110產生所需的維持電流。換句話說，當輸入電壓4在高角 負載電阻!^等效上是不存在的；當輸入電壓、在低角度時， 負載電阻才會存在以作為假負載來汲取電流以讓調光電路】3〇流 15 201215228 ==的維持電流，讓調光電路13G中的雙向交流觸發三極體χ 2持運作。如此-來，貞載電㈣丨不會持續消耗 有 麟讀綠轉，耻 = 此外’在動態負載模組中，逆電流防止電路2_妾於動能 的故置係為了當在階段3(ν(咏2)>Vin)(低角度)時，電 3電電流僅會流至發光貞載⑽，而不會逆向流至整流器21〇的 輸出端。逆電流防止電路280可利用_二極體(如第2圖中的二極體 ⑹實現。電壓箝制電路29㈣來箝制電晶體q之控制端c之電壓 之電位小於—保魏位。如此，#電晶體&不導通時，流至電晶體In the dynamic load module 260, the 'valley voltage compensation circuit 230 detects the voltage Vdet through the second terminal of the capacitor c, in addition to the compensation for the wheel voltage, and the control circuit 270. The waveform of the detection voltage Vdet is as shown in Fig. 8. Further, for convenience of explanation, in the waveform of the detection voltage VDET shown in FIG. 8, the on-voltages of the diodes D D 8 and Dg are not considered. Since the output voltage V〇 is the voltage generated by the valley voltage compensation circuit 23〇 to compensate the valley of the input voltage, and as can be seen from FIG. 8, the detection voltage 14 201215228 vDET is proportional to the output voltage v〇 (the peak value of the detection voltage Vdet) It is half of the voltage peak VPEAK) 'Therefore the detection voltage vDET is roughly proportional to the input voltage. In other words, the valley voltage compensation circuit 230 provides a detection voltage VDET proportional to the input voltage VIN to the control circuit 270. When the potential of the detection voltage VDET of the input voltage Vin is higher than a predetermined potential VPRE, the control circuit 270 turns off the switch SWi, so that the load resistance & is in a floating state; when the _ is detected by the input voltage Vin When the potential of the voltage Vdet is less than the preset potential vPRE, the control circuit 270 turns on the switch SWi to pass the second end of the load resistor core through the switch sW1_ to the output terminal 〇4 of the rectifier 21G. More specifically, when the input voltage ViN is at the middle angle and the high angle, the detection voltage is higher than the threshold voltage VTH of the transistor Q2 (in the real butterfly, the preset potential VpR is the critical value of the body 35 The potential of the voltage VTH)' causes the transistor & Thus, the control terminal (gate) of the transistor α is pulled to a low potential by the transistor 卩2, thereby causing the transistor to be turned off. Therefore, at this time, the load resistance & is in a floating state without providing a load and without consuming any electric energy. On the other hand, when the input voltage Vin is at a low angle, the voltage Vdet proportional to the input voltage vIN is insufficient to conduct the crystal, so that the transistor is turned off. In this way, the control terminal (gate) of the transistor can be taken by the input voltage V and raised to a high potential through the boosting resistor R3', thereby causing the transistor Qi to be turned on. Therefore, at this time, the load resistor R is woven through the transistor Qi to provide a load to allow the AC power source 110 to generate the required sustain current. In other words, when the input voltage 4 is at the high-angle load resistance!^ equivalent, there is no such thing; when the input voltage is at a low angle, the load resistance will exist to draw the current as a dummy load to make the dimming circuit] The turbulence 15 201215228 == the holding current allows the bidirectional AC trigger 调 2 in the dimming circuit 13G to operate. So - come, 贞 贞 ( (4) 丨 will not continue to consume Lin read green turn, shame = In addition 'in the dynamic load module, the reverse current prevention circuit 2_ 妾 kinetic energy is set to be in stage 3 (v (咏2)>Vin) (low angle), the electric current only flows to the illuminating load (10), and does not flow backward to the output of the rectifier 21A. The reverse current preventing circuit 280 can be implemented by using a diode (such as the diode (6) in Fig. 2. The voltage clamping circuit 29 (4) clamps the voltage of the voltage of the control terminal c of the transistor q to be less than - Bao Wei. Thus, # When the transistor & is not conducting, it flows to the transistor
Qi的電，被背納一極體A的崩潰電壓所箝制，而不會造成過高的 電壓來損壞電晶體Ql。如第2圖所示，電壓箝制電路29()可以齊納 一極體(Zener diode)D6 實現。 另外，在動態負載電路22Q中，負載電阻&的設置非為必須。 負載電阻R2之设置係為了在當發光負載j 4 〇所汲取的電流過小時 U即負載過小）’提供乡制貞載以讓雙向交細發三極體 Χι能夠 流通足夠的轉電流。在蝴電路，巾齡流電阻&制來限流 以防止大電流損壞電晶體q2。 細上所述’藉由本發明所提供之發光驅動電路，可根據經整流器 201215228 整流交流電壓後所產生之輸入電壓，動態地產生假負載以提供足夠 的維持電流給調光電路(調光電路中的雙向交流觸發三極體），如此 可避免假負載持續浪費交流電源所提供的電能。此外，在本發明中， 波谷電壓補償電路除了可補償輸入電壓的波谷，以提升功率因素之 外，還可提供比例於輸入電壓之偵測電壓給控制電路’以讓控制電 路可根據偵測電壓控制動態負載電路產生假負載。換句話說，在本 發明中利用波谷電壓補償電路，可省略額外的電壓偵測電路，而節 φ省動態負載模組的成本，如此，帶給使用者更大的便利性。 以上所述僅為本發明之較佳實施例，凡依本發明申請專利範圍 所做之均等變化與修飾，冑應屬本發明之涵蓋範圍。 【圖式簡單說明】 第1圖係為說明-雙向交流觸發三鋪之電流電壓特性之示 為本發明之具有_性負載與提升功率因素之發光㈣電 w 塔之示意圖。 第3圖係為說明交流電 產生之輸入電壓之示意 第4圖、第5圖與第6 作原理之示意圖。 源所提供之f壓經過全波賴式整流器後所 圖。 圖係為說明本發明之波谷賴補償電路之工 第7圖 意圖。 係為說明㈣本發批私麵魏麵叙細傾之示 第8圖為說明波谷補償 電路所提供之偵測賴之示意圖。 201215228 【主要元件符號說明】 110 父流電源 130 調光電路 140 發光負載 200 發光驅動電路 210 整流器 220 動態負載電路 230 波谷電壓補償電路 250 電源轉換電路 260 動態負載模組 270 控制電路 280 逆電流防止電路 290 電壓箝制電路 Vin、V〇、Vac、V〇et、V〇 電壓 Vpeak 峰值 Ii 'I2 輸入端 I〇、Id 電流 Dj ' D2 ' D3 ' D4 ' D5 ' D7 ' Dg ' d9 d6 二極體 齊納二極體 Q、C2、C3、C4 電容 〇l、〇2、〇3、〇4 輸出端Qi's electricity is clamped by the breakdown voltage of the pin A, without causing excessive voltage to damage the transistor Q1. As shown in Fig. 2, the voltage clamping circuit 29() can be implemented by a Zener diode D6. Further, in the dynamic load circuit 22Q, the setting of the load resistance & is not necessary. The load resistor R2 is set so that when the current drawn by the illuminating load j 4 过 is too small, that is, the load is too small), the home-made load is provided to allow the two-way alternating-trimming transistor Φ to be able to circulate sufficient turning current. In the butterfly circuit, the towel current resistor & is used to limit current to prevent large current from damaging the transistor q2. By the above, the illumination driving circuit provided by the present invention can dynamically generate a dummy load according to the input voltage generated by rectifying the AC voltage through the rectifier 201215228 to provide sufficient sustain current to the dimming circuit (in the dimming circuit) The two-way AC trigger triode) prevents the dummy load from consuming the power provided by the AC power source. In addition, in the present invention, the valley voltage compensation circuit can compensate the input voltage to increase the power factor, and can also provide a detection voltage proportional to the input voltage to the control circuit to allow the control circuit to detect the voltage. Control the dynamic load circuit to generate a dummy load. In other words, in the present invention, by using the valley voltage compensation circuit, an additional voltage detecting circuit can be omitted, and the cost of the dynamic load module can be saved, thus giving the user greater convenience. The above are only the preferred embodiments of the present invention, and the equivalent variations and modifications made by the scope of the present invention should be within the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram showing the current-voltage characteristics of the three-way AC-triggered three-strip. The light-emitting (four) electric w-tower having the _-sense load and the boosting power factor of the present invention. Fig. 3 is a schematic diagram showing the input voltage generated by the alternating current, and Fig. 4, Fig. 5 and Fig. 6 are schematic diagrams. The f-voltage provided by the source is shown after passing through the full-wave rectifier. The figure is intended to illustrate the work of the trough-dependent compensation circuit of the present invention. The description is based on (4) the private face of the present invention is shown in detail. Figure 8 is a schematic diagram showing the detection provided by the valley compensation circuit. 201215228 [Main component symbol description] 110 Parental power supply 130 Dimming circuit 140 Luminous load 200 Illumination drive circuit 210 Rectifier 220 Dynamic load circuit 230 Valley voltage compensation circuit 250 Power conversion circuit 260 Dynamic load module 270 Control circuit 280 Reverse current prevention circuit 290 Voltage clamp circuit Vin, V〇, Vac, V〇et, V〇 voltage Vpeak Peak Ii 'I2 Input I〇, Id Current Dj ' D2 ' D3 ' D4 ' D5 ' D7 ' Dg ' d9 d6 Diode Nanodiode Q, C2, C3, C4 Capacitor 〇l, 〇2, 〇3, 〇4 output
18 201215228 R]、R2、R3、R4 電阻 Qi ' Q2 電晶體 Dio 雙向交流觸發二極體 Xi 雙向交流觸發三極體 G, 閘極 Sgi 閘極訊號 Rx 可變電阻 L, 電感 SWi 開關 1918 201215228 R], R2, R3, R4 resistance Qi ' Q2 transistor Dio bidirectional AC trigger diode Xi bidirectional AC trigger G, gate Sgi gate signal Rx variable resistor L, inductor SWi switch 19