M412573 五、新型說明： 【新型所屬之技術領域】 本新型涉及電路領域，更具舰涉及—麟型發光二極體（[則驅 動電路。 【先前技術】 在^球此源紐缺、環保意識不斷提高的背景下’世界各國都在大力發 展綠色巧卿。:LED卿作為節能環健略性新興產業，受湖家和各 度重視’正在快速發展。目前LED技術已趨成熟，由於其具有 =效率=、使料命長料點，在到領域上取代傳_白熾燈已刻不 有的燈杯、燈管等小功率㈣用開關電源配置中，普遍存在 二的批二ί:精f低’印刷板尺寸大等缺點。低功率因數導致電力栅 擔；另 —’棘利用率低，傳輸損耗大等問題，加重電力柵袼負 方面，书奴精度低會影響LED的使用壽命。 【新型内容】 馨於以上所述的問題，本新型提供 電流精度的LED驅動電路。 两1之具有π功率因數和尚 該新型LED驅動電路包括 數校正電路、返樹電路、㈣電路整輸電路、功率因 動電路，其中，交流輸人整 ^/慮波電路、吸收電路以及驅 連接’輸出端與功率ϋ數校正電路_^波電路的輸人端與交流電源相 路的第一輸入端與交流輸入整流和電磁;擾數校正電 二輸入端與驅動電路_端相連接，輸出端相連接，第 接，吸收電路的輸入端與功率因數校正電輸入端相連 驶開關電路的第-輸人端相連接，返路接’輪出端與返 的輸出端相連接，第二輸入端與驅動端與吸收電路 遽波電路的輸入端相連接，控制電路 」出―連接’輪出端與輪出 端以及返驰開關電路的輸出端相 2端與功率因數校正電路的輸出 輪出端與驅動電路的輪入端相連 3 t輸j波電路的輸入端與返馳開關電路的輸出端相連接，輸出端用作 來驅動電路的輸出，其中，交流輸人整流和電磁干觀波電路對 因數源的彳5號進行輸人整流和電磁干賊波’並將信號提供給功率 動功糊數&正電路根據經由驅動電路、來自控制電路的驅 /淑讀輸人整流和電磁干_波電路提供來的信號進行功率因數 開關電供電路的第一輸入端，返驶 輪屮心+Α收路的域進订變壓處並將變壓後的信號提供給 和喻Γ/輸出遽波電路對從返驰開關電路輸出的信號進行輸出整流 雷從而得到作為發光二鋪驅動電路的輸出信號的驅動電流，控制 k驅動電路分驗制神賊校正電路和返·關電路。 邱本Γίί服了财麟的缺陷而提供了—備高辨隨、高電流 ϋ桿準。等伽的LED鶴電路，該LED鶴電路能解合各種安裝 【實施方式】 詳細描述本新型各個方面的特徵和示例性實施例。下面的描述 4 v、體細-’讀提供對本新型的全面理解。但是，對於本孰知 術領域之人來說顯㈣見的是，本新型可以在不需要這些具體㈣ 細即的情況下實施。下面對實施例的描述健是為了通過示出本 .示例來提供對本新型更清楚的理解。本新型絕不限於下面所提出的 具體Ϊ置’岐在不麟柄型雜神哺提下賤了_缝或部 件的任何修改、替換和改進。 圖1不出了根據本新型之一個實施例的發光二極體卿^驅動電路的結 =圖。該新型電路是基於降壓結構開關電路開發的。如圖ι所示，該咖 包括AC輸人整流和電磁干擾（EMI)驗電路卜功率因數校正 =、返馳開關電路3、控制電路4、輸出濾波電路5、吸收電路6和驅 '路7 d LED.H動電路包括兩個電源輸人端（與交流電源ac連接） 和一個電源輸出端（輸出提供給LED的電流）。 & AC輸入整流和_滤波電路】整合了 ac輸入整流和砸驗的功 月。如圖1所示，其-端連接到交流電源，另—端連接到功率因數校正電 M412573 的驅二S行據經由驅動電路7來自控制電路4 路3。吸收電路6 _ μ 作’並通過吸收電路6提供給返馳開關電 護_的令㈣“功率因數校正電路2的輸出信號中的上尖辛，保 /聽物半導體場效應電M(M0SFET)，同時還有-定的Μ、 信號經二返馳式開關操作，將經過功率因數校正的 流和遽波，《其波電路5對該信號進行輪出整 模濾==路1包括:保險絲_，共 ==險絲(_阻)咖連二:並與= 電容㈣=^^^過細⑽整流並經遽波 二極路2包括:升壓電感器U '開關卿卿、續流 白㈣ 〜、波電合C2等。功率因數校正電路2根據經由驅動電路7、來 二，=4 _動信號對從AC輸入整流和EMJ遽波電路ι提供來的信 唬進仃功率因數校正，並將結果通過吸收電路6提供給返驰開關電路3。 返·關電路3包括：變藶器η'開關Μ〇· φ、原電流取樣電 P 1 £麼器丁1的原側（又稱為初級側）接收通過吸收電路6、來自功率 因數校正電路2的信號’並通過變壓器Ή的變壓在次級側產生輸出信號。 輸出信號被輸Μ輸城波電路5，輸域波電路5包括輸終流二極體 D3、輪出舰電容C6等’时對魏_關電路3輸出的信號進行整流和 輸出遽波’從而產生LED驅動電流。原電流取樣電阻R1對在變壓器T1的 原邊側的輸入電流進行取樣，從而通過控制電路4對功率因數校正電路2 的輸出產生作用，從而實現返馳式開關操作。 控制電路4的主要器件由一顆PWM (脈寬調變）控制晶片m和必要 的週邊輔助元件組成。該控制晶片總共包含6只功能接腳，在圖1中分別 標為A-F。下面具體描述每個接腳。 接腳A : GND接腳’用作晶片的基準接地； 5 M412573 、動接腳’如圖1所示’它經過驅動電路7 (下面將描 达）與功率因數枚正電路2中開關mosfetqi 關MOSFETQ2相連，用於驅動M〇SFET; 路3中的開 R6i^L門二:原電流取樣輸入接腳’通過電流採樣補償電阻 R6與1驰開關電路3中的原電流取樣電阻R1、m〇sf 接腳D . INV接腳，它是輔助繞組·採樣輪人接腳 分壓電阻R4與返驰開關電路3中1^輔助、I且 的退磁時間； 中的变壓裔T1相連’用於檢測變壓器T1 接腳E : C〇MP接腳，它是環_償設置接腳； 接腳F : VDD供電接腳，额供電触 相連，用於晶片㈣電路供電。 *另二^圖1所不’控制電路4還包括：啟動電阻112、R3，供電境组 接:濾波電容C3，環路補償電阻C4，輔助繞= 私樣刀昼電阻R4、RS，電流採樣補償電阻处 电变 J=6=E：^A咖㈣，_=在_ " 兩點之間’吸收電路6和驅動電路7的造妓古 式根統要求可以變化，如下面的圖2和圖3:的連接方 不同連接^式了根據本新型之—個實施例的咖驅動電路中吸收電路6的 阻和左側起的第一種連接方式中，吸收電路6通過一電 連接到A。 阻電谷並聯電路的一端，而並聯電路的另一端 在從左側起的第二種連拉 cm)和-普通f 電路6通過—瞬變㈣二極體 二極體的負極相連，Tvs B之間’其中該丁vs的負極和該 幻止極連接到A，二極體的正極連接到β。 6 M412573 省去=ί!第:種連接方式中’與第三種連接方式的不同之處在於 广 電谷，即，僅採用TVS和電阻的並聯，其餘相同。 省去了 ΐΐΞΐΓΓ種連接方式中，與第三種連接方式的不同之處在於 丄的電阻’即，僅採用TVS和電容的並聯，其餘相同。 在從左側起的第六種連接方式中"及路 另-電阻和—二極體串聯而連接在A和广之二^ 正極連接到B。 j 極體的 第七種連接方式中’與第六種連接方式的不同之處在於 不同根據本新狀-個實施_哪媒動電財蝴電=的 和料接方式+ ’购料7α_電㈣喊連接在c 在從上側起的第二種連接方式中，驅動電路7以—二極體盥 麦與另—電阻的並聯形式連接在c和D以及ε和f之間，其中-極體的負極連接到C、E，正極通辦聯的電阻連接到D、F。其中一 於串=上Γ麵第三種連接方式中，與第二種連接方式的不同之處僅在 接=的極體和電阻的位置被交換，即二極體的負極通過串聯 接到C、E，正極連接到D、F。 聯形喊連接方式中’驅動電路7以—二極體與電阻的並 β ^E#〇F"Fb1 * — r，’根據本新㈣實施_ LED_電路克服了現有技術的缺 功率因數、高電流精度、低成本等優點，並且能夠符合各種 枯游:已經參考本新型的具體實施例來描述了本新型，但是本熟知該項 而xi/之人均瞭解’可以對這些具體實施例進行各祕改、纟且合和變更， =脫_權利要求或其等同物限定的本新型的精神和範圍。此外，附 、任何l輪頭應當被認為僅是示例性的，而不是限継的除非另 7 不清楚時，元件或者步 述中可以更好地理解本 M412573 有具體指示。當術語被預見為使分離或組合的能力 驟的組合也將被認為是已經記載了的。 【圖式簡單說明】 從下面結合附圖對本新型的具體實施方式的描 新型，其中：M412573 V. New type description: [New technical field] This new type involves the field of circuit, and it is more involved in the ship-infrared type light-emitting diode ([the drive circuit. [Prior technology] in the ball, this source is lacking, environmental awareness Under the background of continuous improvement, 'the countries all over the world are vigorously developing green and brilliant..: LED Qing as a new energy-saving and emerging industry, which is being developed rapidly by the lake and each degree. The LED technology has matured because of its = Efficiency =, make the material life longer, in the field to replace the _ incandescent lamp has been indispensable for the light cup, lamp and other small power (four) with switching power supply configuration, there are two batches of two ί: fine f Low 'printing board size and other shortcomings. Low power factor leads to power grid load; another - 'low ripple utilization, large transmission loss and other issues, adding to the power grid negative, book book accuracy will affect the LED's service life. New content] Xinxin provides the current precision LED driver circuit. The two have π power factor and the new LED driver circuit includes digital correction circuit, return circuit, (4) The circuit is a whole circuit and a power-driven circuit, wherein the AC input and the input circuit and the absorption circuit and the drive connection are connected to the output terminal and the power supply correction circuit. The first input terminal and the AC input rectification and electromagnetic; the scrambling correction electric two-input terminal is connected with the driving circuit _ terminal, the output end is connected, the first connection, the input end of the absorbing circuit is connected with the power factor correction electric input terminal, and the switch circuit is connected The first-input terminal is connected, the return-connecting terminal is connected to the returning output terminal, and the second input terminal is connected to the driving terminal and the input end of the absorbing circuit chopper circuit, and the control circuit is "connected" The output end of the output terminal of the power-off correction circuit and the input end of the drive circuit are connected to the input end and the flyback switch circuit of the 3 t input j wave circuit. The output terminals are connected, and the output terminal is used as an output of the driving circuit, wherein the AC input rectification and the electromagnetic dry-view circuit perform input rectification and electromagnetic dry thief wave on the 源5 of the factor source and provide the signal to The power dynamics paste & positive circuit is based on the signal supplied from the drive circuit, the drive input from the control circuit, and the electromagnetic dry-wave circuit, the first input end of the power factor switch power supply circuit is returned. The rim heart + Α 的 的 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进 进The driving current of the output signal of the driving circuit, the control k driving circuit is divided into the thief correction circuit and the return circuit. Qiu Benqi ίί served the defect of Cailin and provided the high-definition, high-current mast. The LED crane circuit can be used to disassemble various installations. [Embodiment] The features and exemplary embodiments of various aspects of the present invention are described in detail. The following description 4 v, body-to-read provides a comprehensive view of the present invention. understanding. However, it is apparent to those skilled in the art of the art (4) that the present invention can be implemented without the need for these specific details. The following description of the embodiments is provided to provide a clearer understanding of the present invention. The present invention is by no means limited to the specific arrangements set forth below. Any modification, replacement, and improvement of the sew or component may be made without the stalking. 1 is a diagram showing a junction of a light-emitting diode driving circuit according to an embodiment of the present invention. The new circuit is based on a buck structure switching circuit. As shown in FIG. 1 , the coffee includes AC input rectification and electromagnetic interference (EMI) inspection circuit power factor correction =, flyback switch circuit 3, control circuit 4, output filter circuit 5, absorption circuit 6 and drive 'road 7 d LED.H dynamic circuit consists of two power input terminals (connected to AC power ac) and a power output (output current supplied to the LED). & AC input rectification and _filter circuit] integrates the power of ac input rectification and verification. As shown in Fig. 1, the terminal end is connected to the alternating current power source, and the other end is connected to the power factor correction circuit M412573 from the control circuit 4 via the drive circuit 7. The absorbing circuit 6 _ μ is 'and supplied to the flyback switch _ by the absorbing circuit 6 (4) "The upper symplectic in the output signal of the power factor correction circuit 2, the NAND/sense semiconductor field effect electric M (M0SFET) At the same time, there is a certain Μ, the signal is operated by the two-return type switch, and the power factor corrected flow and chopping will be performed. "The wave circuit 5 performs the round-out filter for the signal. == Road 1 includes: fuse _, total == dangerous wire (_ resistance) coffee even two: and with = capacitor (four) = ^ ^ ^ too fine (10) rectified and chopped two-pole road 2 includes: boost inductor U 'switch Qingqing, continuous flow white (4) ~, wave C2, etc. The power factor correction circuit 2 according to the drive circuit 7, the second, = 4 _ dynamic signal pair from the AC input rectification and EMJ chopper circuit ι to provide power factor correction, And the result is supplied to the flyback switch circuit 3 through the absorption circuit 6. The return/close circuit 3 includes: a transformer η' switch Μ〇·φ, a primary current sampling electric P 1 For the primary side) receiving the signal 'passing from the power factor correction circuit 2 through the absorption circuit 6, and passing the transformer Ή on the secondary side The output signal is output to the urban wave circuit 5, and the transmission domain circuit 5 includes the finalizing diode D3, the wheeled capacitor C6, etc., and rectifies and outputs the signal output from the Wei_off circuit 3. The chopper 'generates the LED drive current. The original current sampling resistor R1 samples the input current on the primary side of the transformer T1, thereby effecting the output of the power factor correction circuit 2 through the control circuit 4, thereby implementing the flyback switch. The main components of the control circuit 4 consist of a PWM (Pulse Width Modulation) control chip m and the necessary peripheral auxiliary components. The control chip contains a total of six functional pins, which are labeled AF in Figure 1. Describe each pin in detail. Pin A: GND pin ' serves as the reference ground for the chip; 5 M412573, moving pin ' as shown in Figure 1 'It passes through the drive circuit 7 (described below) and power factor Positive circuit 2 switch mosfetqi off MOSFETQ2 connected to drive M〇SFET; circuit 3 open R6i^L gate 2: original current sampling input pin 'pass current sampling compensation resistor R6 and 1 in the switch circuit 3 Current sampling R1, m〇sf pin D. INV pin, which is the auxiliary winding · sampling wheel human pin voltage dividing resistor R4 and flyback switch circuit 3 1 ^ auxiliary, I and the demagnetization time; Connected 'used to detect transformer T1 pin E: C〇MP pin, it is the ring _ replenishment pin; pin F: VDD power pin, the balance power contact, for the chip (four) circuit power supply. ^ Figure 1 does not control circuit 4 also includes: start resistors 112, R3, power supply group: filter capacitor C3, loop compensation resistor C4, auxiliary winding = private sample resistor R4, RS, current sampling compensation resistor Electrical change J=6=E:^A coffee (four), _= between _ " between the two points 'the absorption circuit 6 and the drive circuit 7 can be changed, as shown in Figure 2 and Figure 3 below: The connecting side is differently connected. In the first connection mode of the absorbing circuit 6 and the left side in the coffee driving circuit according to the embodiment of the present invention, the absorbing circuit 6 is electrically connected to A through an electric connection. One end of the parallel circuit of the resistance valley, and the other end of the parallel circuit is connected to the negative pole of the transient (four) diode diode through the second connection of the second circuit from the left side, Tvs B Wherein the negative electrode of the Ding vs. and the phantom stop are connected to A, and the positive electrode of the diode is connected to β. 6 M412573 omits = ί! No.: The connection method is different from the third connection method in the radio and electricity valley, that is, only the parallel connection of TVS and resistors is used, and the rest are the same. In the connection mode, the difference from the third connection method is that the resistance of the ’ is that only the parallel connection of the TVS and the capacitor is used, and the others are the same. In the sixth connection mode from the left side, "and the other-resistance and -diode are connected in series and connected to the positive electrode of A and Guangzhi^. j The seventh connection method of the polar body is different from the sixth connection method in that it is different according to the new one - an implementation _ which media power electricity and electricity = the material connection method + 'purchasing material 7α_ Electric (4) shouting connection c In the second connection from the upper side, the drive circuit 7 is connected between c and D and ε and f in parallel with the diode and the other resistor, wherein the pole The negative electrode of the body is connected to C and E, and the resistor connected to the positive electrode is connected to D and F. In the third connection mode of the string=upper plane, the difference from the second connection mode is only exchanged at the position of the pole body and the resistor of the connection = the anode of the diode is connected to the C through the series. , E, the positive pole is connected to D, F. In the joint mode, the drive circuit 7 is combined with the diode and the resistor β ^E#〇F"Fb1 * — r, 'According to this new (four) implementation _ LED_ circuit overcomes the power shortage factor and high in the prior art The advantages of current accuracy, low cost, etc., and the ability to comply with various stalks: The present invention has been described with reference to the specific embodiments of the present invention, but it is well known to those skilled in the art and the knowledge of the specific embodiments can be The spirit and scope of the novel, as defined by the appended claims, or the equivalents thereof. In addition, any l-rounder should be considered as merely exemplary, and not limiting, unless otherwise unclear, the component or step can be better understood in this M412573 with specific instructions. Combinations of terms that are foreseen to be separated or combined are also considered to have been documented. BRIEF DESCRIPTION OF THE DRAWINGS A novel embodiment of the present invention will be described below with reference to the accompanying drawings, in which:
了了個實施例的LED驅動電路的結構框圖； 同連實施例的LED驅動電路中吸收電路6 了根據本新型-個實施 的不 同連接方式 的不 【主要元件符號說明】 (電磁干擾）據波電路The block diagram of the LED driving circuit of an embodiment; the absorbing circuit 6 of the LED driving circuit of the same embodiment has no [main component symbol description] (electromagnetic interference) according to different implementations of the present invention. Wave circuit
1 AC輸入整流和EMI 2 功率因數校正電路 3 返馳開關電路 4 控制電路 5 輸出濾波電路 6 吸收電路1 AC input rectification and EMI 2 power factor correction circuit 3 flyback switch circuit 4 control circuit 5 output filter circuit 6 absorption circuit
7 驅動電路 87 drive circuit 8