M421669 五、新型說明： 【新型所屬之技術領域】 本創作係關於一種發光二極體驅動電路，尤指一 队 動訊號進行放電之發光二極體驅動電路。 ^啟 【先前技術】 請參見第一圖，為傳統的發光二極體驅動電路之電路八土 如圖所示，一驅動控制器Con控制一轉換電路以驅二： 發光二極職組Ld，_換電路為—直祕直流升壓轉換 路，包含一電感L、一電晶體開關SW1、一二極體D以及上 輸出電容C。一電流偵測電阻Ri耦接發光二極體模組Ld，以 偵測流過發光二極體模組Ld之電流1〇的大小，並^此產生一 回授訊號IFB。驅動控制器Con則根據回授訊號IFB控制轉換 電路中的電晶體開關SW1之導通與截止，以控制轉換電路由 一輸入電源Vin所接收並轉換之電力’以於轉換電路的輸出端 產生一輸出電壓Vo ’使得流過發光二極體模組Ld之電流ι〇 穩定於一預定電流值附近。 驅動控制器Con接收一啟動訊號EN，並根據啟動訊號EN 致能而操作，或者禁能而停止操作。當啟動訊號ΕΝ為高準位 時’驅動控制器Con正常操作，控制電晶體開關SW1的導通 與截止的時間比例，使電流1〇及輪出電壓Vo均維持穩定。而 驅動控制器Con也接收一調光訊號DIM，並根據調光訊號DIM 暫停控制及恢復控制電晶體開關SW1。另外，一調光電晶體 開關SW2耦接於發光二極體模組Ld，驅動控制器Con也同時 根據調光訊號DIM導通、截止調光電晶體開關SW2。當驅動 控制器Con根據調光訊號DIM停止控制電晶體開關SW1 (此 時電晶體開關SW1維持截止）時，調光電晶體開關SW2也同 時戴止，如此發光二極體模組Ld會停止流經電流’以避免此 時耗損輸出電容C儲存之電力而維持輸出電壓Vo之電位。因 4 此當驅動控制器Con根據調光訊號DIM再度恢復控制電晶體 開關SW1時’調光電晶體開關sw2也同時導通，流經發光二 極體模組的電流1〇可立刻幾乎等於預定電流值。 然而，當驅動控制器Con被禁能一段時間後重新致能， 會造成剛致能時發光二極體模組Ld會有階段發光。請參見第 二圖’為第一圖所示之發光二極體驅動電路的訊號波形圖。當 啟動訊號EN轉為低準位時，驅動控制器c〇n被禁能。此時， 調光電晶體開關SW2也會被截止，故輸出電容c所儲存之電 力緊會透過一些漏流路徑緩緩下降。過一段時間後，啟動訊號 EN又轉為尚準位時，驅動控制器c〇n被致能，開始控制電晶 體開關SW1、調光電晶體開關SW2。此時，若輸出電壓v〇 若仍尚於發光二極體模組Ld的發光臨界電壓，則發光二極體 模組Ld將立刻發光。並經一段時間，轉換電路才開始能傳送 足夠的電力來提升輸出電壓V〇，並使流經發光二極體模组 的電流穩定於預定電流值。如第二圖所示，驅動控制器c〇n 被致旎至輸出電壓Vo開始上升之間，會有一段時間範圍a發 光二極體模組維持在某一亮度附近，而後再提升至預定電流值 而提供另-敎的亮度。這樣的航對使时會使誤以為發光 二極體驅動電路有電路異常。 【新型内容】 处鑑於先前技術中的發光二極體驅動電路於重新致能時，可 月b發生階段發光之問題。本創作利用一放電電路，使發光二極 體電路中的驅動控制器被禁能時，釋放發*二極體電^中^轉 換電路所儲存的電力，以降低輸出電壓到發光 J臨界電壓之下。如此，即可避免發光二極體驅動 致能的階段發光情況。 為達上述目的，本創作提供了一種發光二極體驅動電路， 包3一轉換電路'一驅動控制器以及一放電電路。轉換電路係 M421669 輸^電源並進行一電力轉換以於一輸出端提供一 梦，二發光二極體模組發光。驅動控制器接收一啟 &於啟動訊號代表啟動時根據代表發光二極體之狀離之 ;回=^2轉換·進行電力轉換，於啟動訊號代表^ Ϊ山ί轉換電路停止進行電力轉換。放電電路輕接轉換電路之 代表關閉時’進行一電力釋放程序以降低 代表啟動時，定11㈣壓值’於啟動訊號 代表啟動時’停止進行電力釋放程序，其定 於發光二極雜組之-發光臨我M。 純電堡值低 -牛下來的詳細說明皆為示範性質，是為了進 優二 【實施方式】 伽第三圖，為根據本創作之—較佳實施例之-發光二 敗。動電路之電路*意圖。發光二極體轉電 二 J路、-驅動控制器Con以及一放電電路 ，並產生一輸出電厪V(m驅動一發光二極體二原 轉換電路為-直流轉直流升壓轉換電路，包含 晶體開關SW1、—二極體D以及-輸出電 :二二電 制器Con❸控制進行電力轉換。電感L之=，控 細，另一端轉接電晶體開關SW1之 入電源 ，之-第二端接地十控制端體開關 巧據驅動控制器Con的控制進行導通或戴止。^ ^ ’以 ，麵接電感L及電晶體開關SW1的連接點 吐的正 ^ C ’以將輸入電源Vin之電力整流後儲存至輪出電 轉換電路的輸出端提供輸出電壓Vo。 ·、谷C而於 一電流偵測電阻Ri耦接發光二極體模組^ 發光二極體模組Ld之-電流1〇的大小，並=偵測流經 像此產生一回授訊 疏1他。驅勁役w态Con根據回授訊號IFB來判斷發光二極體 模組Ld之電流狀態，以調整電晶體開關swi的導通與截止的 時間比例，而達到調控提供給發光二極體模組Ld的電力大 小，使發光二極體模組Ld能穩定發光。驅動控制器c〇n接收 一啟動訊號EN以及一調光訊號DIM，並根據啟動訊號EN及 調光訊號DIM進行操作。當啟動訊號EN代表啟動時，驅動 控制器Con正常操作，以根據回授訊號IFB、調光訊號dim 來控制轉換電路中的電晶體開關SW1。當啟動訊號EN代表關 閉時’驅動控制器Con停止操作，使轉換電路此時停止進行 電力轉換。一調光電晶體開關SW2耦接發光二極體模組Ld， 根據驅動控制器Con的控制導通或截止乂當驅動控制器c〇n 正常操作時，驅動控制器Con根據調光訊號DIM控制及暫停 控制轉換電路中的電晶體開關SW卜以調整發光二極體模纽 Ld的平均亮度。當電晶體開關SW1截止，停止輸入電源 之電力繼績輸入轉換電路時，驅動控制器c〇n也同時 晶體開關SW2，減，不僅触電容c的電位可贿持而 ^時透過發光二極體模組而敎，而且也可使調光的精確度 问。當然’本創作的驅動控制II C〇n咖授控制不以上 =„限，驅動控制器Con也可以根據代表發光二極體模 回^壓狀11的—回授訊號來取代上述代表電流狀態的 口杈汛諕，來控制轉換電路以提供穩定的輸出電壓Vo。M421669 V. New Description: [New Technology Field] This creation is about a light-emitting diode drive circuit, especially a light-emitting diode drive circuit that discharges a signal. ^启[Previous Technology] Please refer to the first figure, which is the circuit of the traditional LED driving circuit. As shown in the figure, a driving controller Con controls a conversion circuit to drive two: Luminous Erpole Ld, The _ change circuit is a direct DC boost converter circuit, which includes an inductor L, a transistor switch SW1, a diode D, and an upper output capacitor C. A current detecting resistor Ri is coupled to the LED module Ld to detect a current flowing through the LED module Ld and to generate a feedback signal IFB. The driving controller Con controls the on and off of the transistor switch SW1 in the conversion circuit according to the feedback signal IFB to control the power of the conversion circuit received and converted by an input power source Vin to generate an output at the output of the conversion circuit. The voltage Vo' stabilizes the current flowing through the light-emitting diode module Ld to be near a predetermined current value. The drive controller Con receives an activation signal EN and operates according to the enable signal EN, or disables the operation. When the start signal ΕΝ is at the high level, the drive controller Con operates normally, and the ratio of the on and off times of the transistor switch SW1 is controlled to keep the current 1 〇 and the turn-off voltage Vo stable. The driving controller Con also receives a dimming signal DIM, and suspends control and resumes control of the transistor switch SW1 according to the dimming signal DIM. In addition, the dimming crystal switch SW2 is coupled to the LED module Ld, and the driving controller Con also turns on and off the dimming crystal switch SW2 according to the dimming signal DIM. When the driving controller Con stops controlling the transistor switch SW1 according to the dimming signal DIM (when the transistor switch SW1 is kept off), the dimming crystal switch SW2 is also worn at the same time, so that the LED module Ld stops flowing. The current 'to avoid the power stored in the output capacitor C at this time to maintain the potential of the output voltage Vo. Therefore, when the drive controller Con resumes controlling the transistor switch SW1 according to the dimming signal DIM, the dimming crystal switch sw2 is also turned on at the same time, and the current flowing through the LED module can be almost equal to the predetermined current value immediately. . However, when the drive controller Con is disabled for a period of time and then re-enabled, the LED module Ld will have a phase illumination when it is enabled. Please refer to the second figure' for the signal waveform diagram of the LED driver circuit shown in the first figure. When the start signal EN turns to the low level, the drive controller c〇n is disabled. At this time, the dimming crystal switch SW2 is also turned off, so the power stored in the output capacitor c is slowly lowered through some leakage paths. After a period of time, when the start signal EN is turned to the standard position, the drive controller c〇n is enabled to start controlling the transistor switch SW1 and the dimming crystal switch SW2. At this time, if the output voltage v〇 is still at the light-emitting threshold voltage of the light-emitting diode module Ld, the light-emitting diode module Ld will immediately emit light. And after a period of time, the conversion circuit can begin to transmit enough power to boost the output voltage V〇 and stabilize the current flowing through the LED module to a predetermined current value. As shown in the second figure, the drive controller c〇n is turned on until the output voltage Vo starts to rise, and there is a period of time in which the light-emitting diode module is maintained near a certain brightness and then raised to a predetermined current. The value provides a different brightness. Such a navigation pair may cause an error in the circuit of the LED driving circuit. [New content] In view of the re-energization of the light-emitting diode driving circuit in the prior art, the problem of light emission in the stage b may occur. The present invention utilizes a discharge circuit to release the power stored in the diode circuit to reduce the output voltage to the threshold voltage of the light-emitting J when the driving controller in the LED circuit is disabled. under. In this way, the stage illumination of the LED driving can be avoided. In order to achieve the above object, the present invention provides a light emitting diode driving circuit, which includes a conversion circuit 'a driving controller and a discharging circuit. The conversion circuit system M421669 converts the power supply and performs a power conversion to provide a dream at one output, and the two-light diode module emits light. The drive controller receives a start & when the start signal represents startup, according to the representative of the light-emitting diode; back = ^ 2 conversion · power conversion, the start signal represents the ^ Ϊ ί conversion circuit to stop power conversion. When the representative of the discharge circuit is lightly connected to the conversion circuit is turned off, 'A power release procedure is performed to lower the representative start time, and the 11th (fourth) voltage value is 'when the start signal represents the start time' to stop the power release procedure, which is set in the light-emitting diode group - Send me to M. The pure electric castle has a low value - the detailed description of the cattle is exemplary, and is for the purpose of improving the second embodiment. [Embodiment] The third figure of the gamma is a luminosity failure according to the present invention. The circuit of the circuit * intent. The light-emitting diode turns to the second J-channel, the drive controller Con and a discharge circuit, and generates an output power V (m drives a light-emitting diode second original conversion circuit to a DC-to-DC boost conversion circuit, including Crystal switch SW1, - diode D and - output power: two or two electric controllers Con❸ control for power conversion. Inductance L =, fine control, the other end of the transistor switch SW1 into the power supply, the second end The grounding ten control end body switch is turned on or off according to the control of the drive controller Con. ^ ^ ', the surface of the inductor L and the transistor switch SW1 is spitting the positive ^ C ' to input the power of the power supply Vin After rectification, it is stored at the output end of the wheel output switching circuit to provide an output voltage Vo. · Valley C and a current detecting resistor Ri coupled to the LED module ^ LED module Ld - current 1〇 The size, and = detection flow through the generation of a feedback to sparse him. Drive the state w state Con according to the feedback signal IFB to determine the current state of the LED module Ld to adjust the transistor switch swi Ratio of conduction to cutoff time, while achieving regulation provides for illumination The power of the polar body module Ld enables the LED module Ld to stably emit light. The driving controller c〇n receives an activation signal EN and a dimming signal DIM, and performs according to the activation signal EN and the dimming signal DIM. When the start signal EN is activated, the drive controller Con operates normally to control the transistor switch SW1 in the conversion circuit according to the feedback signal IFB and the dimming signal dim. When the start signal EN represents off, the drive controller Con stops the operation, so that the conversion circuit stops power conversion at this time. The adjustable photoelectric crystal switch SW2 is coupled to the LED module Ld, and is turned on or off according to the control of the drive controller Con. When the drive controller c〇n operates normally When the driving controller Con controls and pauses the transistor switch SW in the conversion circuit according to the dimming signal DIM to adjust the average brightness of the LED module Ld. When the transistor switch SW1 is turned off, the power of the input power source is stopped. When the input conversion circuit is used, the drive controller c〇n is also simultaneously turned on the crystal switch SW2, and the potential of the contact capacitor c can be bribed and passed through the LED module.敎, and can also make the accuracy of dimming. Of course, 'the drive control of this creation II C〇n coffee control is not above = limit, the drive controller Con can also be based on the representative of the light-emitting diode die The feedback signal of 11 is replaced by the above-mentioned feedback signal to control the conversion circuit to provide a stable output voltage Vo.
昧放^電路搞接轉換電路之輸出端，於啟動訊號E 行一電力釋放程序以降低輸出端的輸出電壓之 動日士 γ "f或小於一預定箝制電壓值，於啟動訊號EN代表啟 C 電力f放程序。而預定電壓值低於發光二極體 剛轉變成此當啟動訊號EN由代表關閉 電立刻發光。放電 K) 及—放電單元20。罐轉換單元 匕各電曰曰體開關m、電阻R卜串聯於輸入電源—及 M421669 f f於其連接點產生一放電切換訊號sdis。電晶體開 =啟動· EN切換於導通及截止之間。當啟動訊號en ϋ 動)時’電晶體開關mi導通，放電切換訊號 ，使放電單元2〇停止電力釋放程序；當啟動訊 號為低準位(代表關閉)時，電晶體開關Ml截止，放電切 換訊號Sdis為高雜’使放電單元2()啟動電力釋放程序，以 降低輸出賴Vo至預定箝制電壓值或以下。放電單元20包含 -二極體Z卜-電阻R3以及一電晶體開關M2，依序串聯於 轉的f出端及接地之間。電晶體開關M2根據放電_ 訊唬sdls導通與截止。當啟動訊號EN為高準位(代表啟 時二電晶體開關M2被截止，此時放電單元2〇不運作；當啟 動§fl號EN。為低準位(代表關閉〉時，電晶體開關Μ:被導通， 此時放電單元2G軸—導祕彳f，⑽輸㈣雜存的電 釋放’直至二極體Z1不再能導通錢為止。在本實施， -極體Z1為齊納二極體’預絲制電壓值為其雪崩電壓值。 的作用為限流，可使二極體Z1於此時流經的電流 二極體Z1也可以是肖特基二極體或其他等效 上述訊號轉換單元10除了將啟動訊號EN適當地 ，電切換訊號Sdis以控做電單元2〇正確地執行電力釋放 序，並且於輸入電源Vin過低或尚未輸入轉換電路時， 電，路的運作以避免可能的誤動作。訊號轉換單元1〇也可以 同時提供其他的功能。言青參見第四圖，為根據本創作 2施例之訊號讎電路之電路示。在本實施例中$ 轉換電路10a包含-N型雙載子接面電晶體m、一都 ^面電晶體B2、-電阻R4、-二極體Z2以及—輸 二極體Z2以及輸人電容Cin構成輸人啟動單元。P 又載子接面電晶體B2的射極耦接輸入電源Vin， =雙載子接面f晶體B1的集極以產生放電切換訊^施， 而集極輕接電阻R4之一端。N型雙載子接面電晶體抝的射 ，接地，而基極接收啟動訊號EN以據此對應產生放電切換訊 號Sdis控制放電單元2〇中的電晶體開關μ?。電阻R4的另一 端耦接二極體Z2之負端，在本實施例中，二極體Z2為齊納 二極體，其正端接地。輸入電容Cin與二極體Z2並聯。當輸 入電源Vin輸入轉換電路時，透過p型雙載子接面電晶體B2、 ，阻R4將電力儲存於輸入電容Cin，並透過二極體Z2的電壓 $制作用，將輸入電容Cini電壓箝制於一穩定值，以產生一 操作電壓VCC以供驅動控制器c〇n操作所需。 接，，請參見第五圖，為第三圖所示之發光二極體驅動電 路的訊號波形圖。當啟動訊號EN由高準位轉為低準位時，由 於放電，路的電力釋放程序之作用，輸出電壓被降至低於發光 臨界電壓的預定箝制電壓值。.當啟動訊號EN由低準位轉為高 準位時驅動控制器Con被禁能而開始操作，使輸出電壓v〇 由低於發光臨界電壓的準位開始上升直至流經發光二極體模 組的電流1〇到達敢電紐為止。故不會^現如先前技術班 的階段發光之情況。預定箝制電壓值的設定，最低以高於輸入 電源Vin之電壓為佳’以避免電流可以從輸入電源Vin，透過 電感L、二極體D、二極體z卜電阻R3以及電晶體開關M2 ，導通’而造成不必要之功耗◊另外，預定箝制電壓值也可設 疋於低於發光臨界電壓一預定電壓值以上，以避免當轉換電路 ，-啟，所傳送至輸出電容c的能量’即足以將輸出電壓v〇 提升至尚於發光臨界電壓，也可能在產生類似階段發光之現 象。 如上所述，本創作完全符合專利三要件：新穎性、進步性 ^業上的侧性。本創作在上文巾已以較佳實施例揭露，然 見、習本巧技術者應理解的是，該實施例僅用於描繪本創作，而 =解讀為關本創作之麵。應注意的是，舉凡與該實施例 ，效之變化與置換，均應設為涵蓋於本創作之麟内。因此， 本創作之賴範圍當町文之申請專繼圍所界定者為準。 M421669 【圖式簡單說明】 第一圖為傳統的發光二極體驅動電路之電路示意圖。 第二圖為第一圖所示之發光二極體驅動電路的訊號波形 圖。 ^ &第三圖為根據本創作之一較佳實施例之一發光二極體驅 動電路之電路示意圖。 之電S ^ ί根據本創作之另—較佳實施例之訊號轉換電路 第五圖為第三圖所示夕欢、卩 圖。 發光二極體驅動電路的訊號波形 【主要元件符號說明】 先前技術：The output circuit of the switching circuit is connected to the power-on sequence of the start signal E to reduce the output voltage of the output terminal, and the value of the voltage is less than a predetermined clamp voltage. Power f program. The predetermined voltage value is lower than that of the light-emitting diode, which is just turned into this when the start signal EN is turned off by the representative immediately. Discharge K) and - discharge unit 20. The tank conversion unit 匕 each electric body switch m, the resistor Rb is connected in series to the input power source—and the M421669 f f generates a discharge switching signal sdis at its connection point. Transistor On = Start · EN switches between on and off. When the signal is activated, the transistor switch mi is turned on, the discharge switch signal is output, so that the discharge unit 2〇 stops the power release program; when the start signal is low level (representatively closed), the transistor switch M1 is turned off, and the discharge switch is switched. The signal Sdis is high miscellaneous' causes the discharge unit 2() to initiate a power release procedure to reduce the output volt to a predetermined clamp voltage value or below. The discharge unit 20 includes a diode Z-resistor R3 and a transistor switch M2 connected in series between the output terminal of the turn and the ground. The transistor switch M2 is turned on and off according to the discharge _ sdls. When the start signal EN is at a high level (on behalf of the start, the transistor switch M2 is turned off, at this time, the discharge unit 2 〇 does not operate; when the §fl number EN is activated. When the low level (represents off), the transistor switch Μ : is turned on, at this time, the discharge unit 2G axis - guide 彳 f, (10) input (four) miscellaneous electrical release ' until the diode Z1 can no longer lead money. In this implementation, - the polar body Z1 is Zener diode The body 'pre-wire voltage value is the avalanche voltage value. The function is the current limiting, and the current diode Z1 through which the diode Z1 flows may also be a Schottky diode or other equivalent signal. In addition to properly starting the signal EN, the switching unit 10 electrically switches the signal Sdis to control the power unit 2 to correctly perform the power release sequence, and when the input power source Vin is too low or has not been input to the conversion circuit, the operation of the circuit is avoided. Possible misoperations. The signal conversion unit 1〇 can also provide other functions at the same time. See Fig. 4 for the circuit diagram of the signal 雠 circuit according to the embodiment of the present invention. In the embodiment, the conversion circuit 10a includes - N-type double carrier junction transistor m, one face The crystal B2, the resistor R4, the diode Z2, and the diode Z2, and the input capacitor Cin constitute the input start unit. The emitter of the P-connector transistor B2 is coupled to the input power source Vin, = double The collector of the carrier b is the collector of the crystal B1 to generate a discharge switching signal, and the collector is connected to one end of the resistor R4. The N-type bipolar contact transistor is grounded and grounded, and the base receives the start signal EN. In response to this, the discharge switch signal Sdis is used to control the transistor switch μ in the discharge unit 2? The other end of the resistor R4 is coupled to the negative terminal of the diode Z2. In this embodiment, the diode Z2 is Zener. The diode is grounded at its positive terminal. The input capacitor Cin is connected in parallel with the diode Z2. When the input power source Vin is input to the conversion circuit, the power is stored in the input capacitor Cin through the p-type bipolar junction transistor B2 and the resistor R4. And through the voltage of the diode Z2 for manufacturing, the input capacitor Cini voltage is clamped to a stable value to generate an operating voltage VCC for the drive controller c〇n to operate. Connect, see the fifth figure , is the signal waveform diagram of the LED driving circuit shown in the third figure. When the signal EN changes from the high level to the low level, due to the discharge, the power release program of the circuit, the output voltage is reduced to a predetermined clamp voltage lower than the threshold voltage of the illumination. When the start signal EN is turned from the low level When the driving controller Con is disabled at the high level, the operation is started, so that the output voltage v 开始 starts to rise from the level lower than the lighting threshold voltage until the current flowing through the LED module reaches 1 敢 电Therefore, it will not be the case of the lighting of the previous technical class. The setting of the preset clamping voltage value is preferably higher than the voltage of the input power supply Vin to avoid the current can be from the input power source Vin, through the inductance L, the pole The body D, the diode z, the resistor R3, and the transistor switch M2 are turned on to cause unnecessary power consumption. In addition, the predetermined clamp voltage value may be set to be lower than a predetermined threshold value of the light-emitting threshold voltage to avoid When the conversion circuit, -en, the energy delivered to the output capacitor c is sufficient to raise the output voltage v 至 to the illuminating threshold voltage, it may also produce a similar phase of luminescence. As mentioned above, this creation is fully in line with the three requirements of the patent: novelty, progressiveness, and industry side. The present invention has been disclosed in the preferred embodiments, and it should be understood by those skilled in the art that this embodiment is only used to depict the present creation, and that = is interpreted as the face of the creation. It should be noted that the changes and substitutions of the embodiments and the effects of the embodiments should be included in the present invention. Therefore, the scope of this creation is subject to the definition of the application of the township. M421669 [Simple description of the figure] The first picture shows the circuit diagram of the traditional LED driving circuit. The second figure is a signal waveform diagram of the LED driving circuit shown in the first figure. ^ & The third figure is a circuit diagram of a light-emitting diode driving circuit according to a preferred embodiment of the present invention. The signal conversion circuit according to another preferred embodiment of the present invention is shown in the third figure. Signal waveform of the LED driver circuit [Key component symbol description] Prior art:
驅動控制器Con 發光二極體模組Ld 電感L 電晶體開關SW1 二極體D 輸出電容C 電流偵測電阻Ri 電流Ιο 回授訊號IFB 輸入電源Vin 啟動訊號ΕΝ 調光訊號DIM 調光電晶體開關S W2 本創作： 驅動控制器Con M421669 輸入電源Vin 輸出電壓Vo 發光二極體模組Ld 電感L·Drive Controller Con Light Emitting Diode Module Ld Inductance L Transistor Switch SW1 Diode D Output Capacitor C Current Sense Resistor Ri Current Ιο Feedback Signal IFB Input Power Vin Start Signal 调 Dimming Signal DIM Dimming Crystal Switch S W2 This creation: Drive controller Con M421669 Input power Vin output voltage Vo LED module Ld inductor L·
電晶體開關SW1、Ml、M2 二極體D、Z卜Z2 電流偵測電阻Ri 電流Ιο 回授訊號IFB 啟動訊號ΕΝ 調光訊號DIM 調光電晶體開關SW2 訊號轉換單元10 放電單元20 電阻 Rl、R3、R4 放電切換訊號Sdis 訊號轉換電路l〇a N型雙載子接面電晶體B1 P型雙載子接面電晶體B2 輸入電容Cin 操作電壓VCCTransistor Switch SW1, Ml, M2 Diode D, Z Bu Z2 Current Sense Resistor Ri Ιο Feedback Signal IFB Start Signal ΕΝ Dimming Signal DIM Dimming Crystal Switch SW2 Signal Conversion Unit 10 Discharge Unit 20 Resistor Rl, R3 , R4 discharge switching signal Sdis signal conversion circuit l〇a N type double carrier junction transistor B1 P type double carrier junction transistor B2 input capacitance Cin operating voltage VCC
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