TWI232071B - Non-linear loading boost circuit - Google Patents

Non-linear loading boost circuit Download PDF

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Publication number
TWI232071B
TWI232071B TW092127389A TW92127389A TWI232071B TW I232071 B TWI232071 B TW I232071B TW 092127389 A TW092127389 A TW 092127389A TW 92127389 A TW92127389 A TW 92127389A TW I232071 B TWI232071 B TW I232071B
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Taiwan
Prior art keywords
voltage
linear load
emitting diode
patent application
electrically coupled
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TW092127389A
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Chinese (zh)
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TW200514478A (en
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Joshru Lee
Andre Yu
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Beyond Innovation Tech Co Ltd
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Priority to TW092127389A priority Critical patent/TWI232071B/en
Priority to JP2003410794A priority patent/JP3970839B2/en
Priority to KR10-2003-0090053A priority patent/KR100528259B1/en
Publication of TW200514478A publication Critical patent/TW200514478A/en
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Publication of TWI232071B publication Critical patent/TWI232071B/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0252—Improving the response speed
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/025—Reduction of instantaneous peaks of current

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Dc-Dc Converters (AREA)

Abstract

A non-linear loading boost circuit, it comprises a non-linear loading, a feedback voltage detector, a pulse width modulation controlling circuit and a power switch. The feedback voltage detector of the non-linear loading boost circuit accords the feedback voltage that transmits from the non-linear loading to compare with the pre-reference voltage in the adaptable triangle generator. And the adaptable triangle generator can adjust the amplitude of the outputting triangle in continuity or discontinuity.

Description

1232071 五、發明說明（1) 發明所屬之技術領域 本發明是有關於一種升壓電路，且特別是有關於一種 能由可調式三角波產生器根據於升壓電路上所測得之回授 電壓之變動，而輸出不同振幅之三角波，以改變脈波調變 控制電路輸出之脈波信號之寬度的升壓電路。 先前技術 在電子科技突飛猛進的今曰，發光二極體（Light Emitting Diode，簡稱LED)因具有體積小（組合多樣化 )、反應速度快（可在高頻下操作）、發熱量低（沒有熱 輻射）、耗電量低（以低電壓、低電流即可啟動）、壽命 長（可使用達1萬小時以上）、環保（耐震、耐衝擊不容 易破、廢棄物可回收，沒有污染）、易開發成為輕薄短小 之產品等優點。同時，發光二極體亦沒有白熾燈泡高耗 電、易碎及日光燈廢棄物含汞污染的問題等缺點。所以， 發光二極體已經逐漸取代原有的照明設備而成為照明市場 的一大潛力商品。 傳統的發光二極體可直接使用直流電壓，如電池等驅 動二極體發光，或者利用升壓電路將電壓升高，再驅動多 顆串聯的二極體發光。但發光二極體在使用時，電流與電 壓間的特性並不是完全的成線性關係，而是當電源供給之 電壓高於一特定電壓時，發光二極體才會出現較大的導通 電流而開始發光。 請參照第5圖，其繪示習知一種發光二極體升壓電路 圖。在習知之發光二極體升壓電路中500，其包括脈波調1232071 V. Description of the invention (1) The technical field to which the invention belongs The present invention relates to a step-up circuit, and more particularly to a method that can be used by an adjustable triangle wave generator to measure the feedback voltage on the step-up circuit. A boost circuit that outputs triangular waves of different amplitudes to change the width of the pulse wave signal output by the pulse wave modulation control circuit. With the advancement of the previous technology in electronic technology, the light emitting diode (Light Emitting Diode, LED for short) has a small size (combination and diversification), fast response speed (operable at high frequency), low heat generation (no heat Radiation), low power consumption (starting with low voltage and low current), long life (can be used for more than 10,000 hours), environmental protection (shock resistance, impact resistance is not easy to break, waste can be recycled, no pollution), Easy to develop into thin and light products. At the same time, light-emitting diodes do not have the disadvantages of high power consumption, fragility, and mercury pollution from fluorescent lamp waste. Therefore, light-emitting diodes have gradually replaced the original lighting equipment and become a large potential commodity in the lighting market. Traditional light-emitting diodes can directly use a DC voltage, such as a battery, to drive the diode to emit light, or use a booster circuit to increase the voltage and then drive multiple diodes in series to emit light. However, when the light-emitting diode is in use, the characteristics between current and voltage are not completely linear, but when the voltage supplied by the power supply is higher than a specific voltage, the light-emitting diode will have a large on-current. Began to glow. Please refer to FIG. 5, which shows a conventional booster circuit diagram of a light emitting diode. In the conventional light-emitting diode boost circuit 500, which includes pulse wave modulation

11956twf.ptd 第6頁 1232071 五、發明說明（2) 變控制（Pulse Width Modulation ，簡稱PWM)電路510 、 功率開關5 3 0、發光二極體模組5 4 0、電阻5 5 0、電感5 6 0、 整流二極體570與電容576。在習知之發光二極體升壓電路 5 0 0中，其係將電壓源所供給之較低的電壓經過升壓後， 轉換成可驅動多顆發光二極體5 4 2串聯而成之發光二極體 模組540的高電壓。 在習知之發光二極體升壓電路中5 0 0 ，功率開關5 3 〇係 由脈波調變控制電路5 1 0所發出驅動訊號來控制是否導 ' 通。當功率開關5 3 0被導通時，由電壓源至電感5 6 〇與功率 開關5 3 0將形成一充電路徑，而電壓源供給之電壓所代表 的電能將被以電流形式儲存於電感5 6 0之内。反之，當功 率開關5 3 0被關閉時，由電感5 6 0、整流二極體5 7 0、^光 二極體模組540與電谷576將形成一迴路，所以儲存在電咸 5 6 0内之電流將經由整流二極體5 7 0流至電容5 7 6與發光二^ 極體模組5 4 0中’完成了整個升壓的過程。 由此可知’能否順利完成升壓的步驟則如上所述，係 由脈波調變控制電路5 1 〇發出之控制訊號來控制功率開關” 5 3 0之導通或關閉。在脈波調變控制電路5 1 0中，其包括固 定式三角波產生器512、誤差放大器514、比較器516、泉 考電壓產生器518與驅動電路5 2〇，而誤差放大器514之^ 端搞接至電阻5 5 〇之其中一端，並根據流過電阻5 5 0之電、 流，得到一回授電壓，而誤差放大器5 1 4之正端則耦接至 參考電壓產生器518。當誤差放大器514得到回授電壓後， 則將其與參考電壓作運算，然後輸出所產生之誤差輸出信11956twf.ptd Page 6 1232071 V. Description of the Invention (2) Pulse Width Modulation (PWM) circuit 510, power switch 5 3 0, light emitting diode module 5 4 0, resistance 5 5 0, inductance 5 6 0. Rectifying diode 570 and capacitor 576. In the conventional light-emitting diode boosting circuit 500, it converts the lower voltage supplied by the voltage source into a light-emitting diode which can drive a plurality of light-emitting diodes 5 4 2 in series after being boosted. High voltage of the diode module 540. In the conventional light-emitting diode boost circuit 500, the power switch 5300 is controlled by the drive signal issued by the pulse-wave modulation control circuit 5100. When the power switch 5 3 0 is turned on, a charging path is formed from the voltage source to the inductor 5 6 0 and the power switch 5 3 0, and the electric energy represented by the voltage supplied by the voltage source will be stored in the inductor 5 6 in the form of current. Within 0. Conversely, when the power switch 5 3 0 is turned off, the inductor 5 6 0, the rectifying diode 5 7 0, the photodiode module 540 and the electric valley 576 will form a loop, so it is stored in the electric salt 5 6 0 The internal current will flow through the rectifying diode 5 7 0 to the capacitor 5 7 6 and the light emitting diode module 5 4 0 to complete the entire step-up process. It can be known from the above that the steps of whether the boost can be successfully completed are as described above. The control signal from the pulse wave modulation control circuit 5 10 is used to control the power switch "5 30" to be turned on or off. In the pulse wave modulation The control circuit 5 1 0 includes a fixed triangular wave generator 512, an error amplifier 514, a comparator 516, a spring voltage generator 518, and a driving circuit 5 2. The ^ terminal of the error amplifier 514 is connected to the resistor 5 5. One end of 〇, and a feedback voltage is obtained according to the electricity and current flowing through the resistor 5 50, and the positive terminal of the error amplifier 5 1 4 is coupled to the reference voltage generator 518. When the error amplifier 514 receives a feedback After the voltage, it is calculated with the reference voltage, and then the error output signal is output.

11956twf.ptd 第7頁 1232071 五、發明說明（3) 號（如第6圖之604所示）至比較器516之正端。接著，比 較器5 1 6則將固定式三角波產生器5 1 2所輪出之三角波（妒 第6圖之6 0 2所示）與誤差輸出信號（如第6圖之6 0 4所米） 作運算。最後，由驅動電路5 2 0將脈波輪出信號轉換為軀 動訊號（第6圖之6 〇 6所示之脈波輸出信號）後輸出至切換 開關5 3 0。而由於習知係使用固定式三角波產生器5 1 2所輸 出之固定振幅的三角波，所以其需要較長的時間才能達到 驅動發光二極體模組5 4 0所需之驅動電壓，而且無法即時 針對驅動電壓的突然改變，來調整功率開關5 3 〇的導通或 關閉。 綜合以上所述，習知之發光二極體升壓電路具有下列 缺點： (1 )習知之發光二極體升壓電路，由於發光二極體 元件的非線性特性，所以習知的升壓電路需要較長的時間 才能達到操作發光二極體的電壓。 (2 )習知之發光二極體升壓電路，由於發光二極體 元件的非線性特性’所以習知的升壓電路在穩態操作時需 要特別注意因小幅電壓變動所造成較大之電流變化，而改 變二極體發光亮度的問題。 (3 )習知之發光二極體升壓電路的靈敏度較高時， 雖然可以利用時間常數的設定而擁有較佳暫態響應，但卻 會造成暫態過多的超越量及大幅降低系統穩態的穩定度。 (4 )習知之發光二極體升壓電路的靈敏度較低時， 雖然可以利用時間常數的設定來增加系統穩態的穩定度，11956twf.ptd Page 7 1232071 V. Description of the invention (3) (shown as 604 in Fig. 6) to the positive terminal of the comparator 516. Next, the comparator 5 1 6 compares the triangular wave (shown in Fig. 6 6 2) with the error output signal (as shown in Fig. 6 6 0 4) Operation. Finally, the driving circuit 5 2 0 converts the pulse wave output signal into a body signal (pulse output signal shown in FIG. 6 6) and outputs it to the switch 5 3 0. Since the conventional system uses a fixed-amplitude triangular wave output from a fixed triangular wave generator 5 1 2, it takes a long time to reach the driving voltage required to drive the light-emitting diode module 5 4 0, and it cannot be performed in real time. In response to a sudden change in the driving voltage, the on or off of the power switch 5 3 0 is adjusted. To sum up, the conventional light-emitting diode booster circuit has the following disadvantages: (1) The conventional light-emitting diode booster circuit requires the conventional booster circuit due to the non-linear characteristics of the light-emitting diode element. It takes a long time to reach the voltage to operate the light emitting diode. (2) The conventional light-emitting diode boost circuit, due to the non-linear characteristics of the light-emitting diode element, so the conventional boost circuit needs to pay special attention to large current changes caused by small voltage fluctuations during steady-state operation. While changing the brightness of the diode. (3) When the sensitivity of the conventional light-emitting diode boost circuit is high, although the time constant setting can be used to have a better transient response, it will cause excessive transient transients and greatly reduce the system's steady state. stability. (4) When the sensitivity of the conventional light-emitting diode boost circuit is low, although the time constant setting can be used to increase the stability of the system's steady state,

11956twf.ptd 頁 1232071 五、發明說明（4) 但卻會換來較差的暫態響應，使得系統到達穩態的時間會 因此加長。 (5 )習知之發光二極體升壓電路，由於脈波寬度是 由回授的信號（電壓）和參考電壓產生的誤差所調變，因 此回授信號的雜訊會直接對脈波寬度產生影響。 發明内容 因此本發明的目的就是在提供一種非線性負載升壓電 路，其係利用回授電壓檢測器根據非線性負載傳來之電流 所產生的回授電壓，於脈波調變控制電路中之可調式三角 波產生器以預設之參考電壓與回授電壓作比較後，以連續 性或分段性方式調整所輸出之三角波之振幅，以減少達到 穩態所需的時間。 本發明提出一種非線性負載升壓電路，此非線性負載 升壓電路電性耦接至電流源，且包括非線性負載、回授電 壓檢測器、脈波調變控制電路與功率開關。此非線性負載 係使電流源供給之電流從非線性負載之輸入端流向非線性 負載之輸出端，以完成升壓。其次，回授電壓檢測器則根 據非線性負載傳來之電流產生回授電壓，並輸出至脈波調 變控制電路。最後，脈波調變控制電路中之可調式三角波 產生器以預設之參考電壓與回授電壓作比較後，以選擇性 地輸出包括第一振幅、第二振幅與第三振幅其中之一的三 角波。同時，誤差信號產生器則在比較回授電壓與參考電 壓後，輸出誤差信號。接著，比較器於比較誤差信號與三 角波後，輸出控制訊號。最後，由驅動電路將控制訊號轉11956twf.ptd Page 1232071 V. Description of the Invention (4) However, it will get a poor transient response, so that the system will take longer to reach steady state. (5) The conventional light-emitting diode boost circuit, because the pulse width is modulated by the error caused by the feedback signal (voltage) and the reference voltage, so the noise of the feedback signal will directly generate the pulse width influences. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a non-linear load boosting circuit, which uses a feedback voltage detector to generate a feedback voltage based on a current transmitted by a non-linear load in a pulse wave modulation control circuit. The adjustable triangle wave generator compares the preset reference voltage with the feedback voltage and adjusts the amplitude of the triangle wave output in a continuous or segmented manner to reduce the time required to reach steady state. The invention provides a non-linear load booster circuit. The non-linear load booster circuit is electrically coupled to a current source, and includes a non-linear load, a feedback voltage detector, a pulse wave modulation control circuit, and a power switch. This non-linear load causes the current supplied by the current source to flow from the input of the non-linear load to the output of the non-linear load to complete the boost. Secondly, the feedback voltage detector generates a feedback voltage based on the current from the non-linear load and outputs it to the pulse wave modulation control circuit. Finally, the adjustable triangle wave generator in the pulse wave modulation control circuit compares the preset reference voltage with the feedback voltage to selectively output one of the first amplitude, the second amplitude, and the third amplitude. Triangle wave. At the same time, the error signal generator outputs the error signal after comparing the feedback voltage with the reference voltage. Then, the comparator outputs the control signal after comparing the error signal with the triangular wave. Finally, the control signal is transferred by the drive circuit.

11956twf.ptd 第9頁 1232071 五、發明說明（5) 換為決定是否導通功率開關之驅動訊號後輸出。其中，當 功率開關被關閉時，電流源供給電流給非線性負載；反 之，當功率開關被導通時，電流源停止供給電流給非線性 負載。 依照本發明的較佳實施例所述，上述之可調式三角波 產生器包括根據參考電壓與回授電壓決定非線性負載升壓 電路目前之工作狀態。其中，當回授電壓與參考電壓之差 值超過暫態電壓時，非線性負載升壓電路工作在啟始狀 態，且可調式三角波產生器係輸出包括第一振幅的三角 波。當回授電壓與參考電壓之差值低於暫態電壓時，非線 性負載升壓電路工作在暫態狀態，且可調式三角波產生器 係輸出包括第二振幅的三角波。當回授電壓大致等於參考 電壓時，非線性負載升壓電路工作在穩定狀態，且可調式 三角波產生器係輸出包括第三振幅的三角波。 依照本發明的較佳實施例所述，上述之第一振幅小於 第二振幅，且第二振幅小於第三振幅。 依照本發明的較佳實施例所述，上述之電流源包括儲 存元件，其係在功率開關被關閉時，以電流形式儲存電壓 源供給之電能，並於功率開關被導通時，釋出電流。 依照本發明的較佳實施例所述，上述之非線性負載升 壓電路更包括電容，其在功率開關被導通時儲存一儲存電 壓，並於功率開關被關閉時，釋出儲存電壓，供給驅動非 線性負載操作所需之電壓。 依照本發明的較佳實施例所述，上述之更包括整流二11956twf.ptd Page 9 1232071 V. Description of the invention (5) Change to output after deciding whether to turn on the drive signal of the power switch. Among them, when the power switch is turned off, the current source supplies current to the non-linear load; otherwise, when the power switch is turned on, the current source stops supplying current to the non-linear load. According to a preferred embodiment of the present invention, the adjustable triangle wave generator includes determining a current working state of a non-linear load boosting circuit according to a reference voltage and a feedback voltage. Among them, when the difference between the feedback voltage and the reference voltage exceeds the transient voltage, the non-linear load booster circuit works in the initial state, and the adjustable triangle wave generator output includes a triangle wave of a first amplitude. When the difference between the feedback voltage and the reference voltage is lower than the transient voltage, the non-linear load booster circuit works in a transient state, and the adjustable triangle wave generator output includes a triangle wave with a second amplitude. When the feedback voltage is approximately equal to the reference voltage, the non-linear load booster circuit works in a stable state, and the adjustable triangle wave generator output includes a triangle wave of a third amplitude. According to a preferred embodiment of the present invention, the first amplitude is smaller than the second amplitude, and the second amplitude is smaller than the third amplitude. According to a preferred embodiment of the present invention, the above-mentioned current source includes a storage element, which stores electric energy supplied by the voltage source in the form of current when the power switch is turned off, and releases current when the power switch is turned on. According to a preferred embodiment of the present invention, the above-mentioned non-linear load boosting circuit further includes a capacitor, which stores a stored voltage when the power switch is turned on, and releases the stored voltage when the power switch is turned off, and supplies the drive Voltage required for non-linear load operation. According to a preferred embodiment of the present invention, the foregoing further includes a rectifier 2

11956twf.ptd 第10頁 1232071 五、發明說明（6) 極體，其為使電流從整流二極體之第一端流向整流二極體 之第二端。 依照本發明的較佳實施例所述，上述之非線性負載為 由一個或一個以上發光二極體組成之發光二極體模組。 本發明因採用可調式三角波產生器，因此可針對回授 電壓與預設之參考電壓之差值，調變出振幅不同之三角 波，以減少電路達到穩態的響應時間。 為讓本發明之上述和其他目的、特徵、和優點能更明 顯易懂，下文特舉一較佳實施例，並配合所附圖式，作詳 細說明如下： 實施方式： 在本實施例中，其最大之技術特徵在於設計一個可調 式三角波產生器，使得脈波調變控制電路能更正確的控制 功率開關，並減少發光二極體升壓電路達到穩態的響應時 請參照第1圖，其繪示依照本發明一較佳實施例的一 種發光二極體升壓電路圖。在第1圖之發光二極體（非線 性負載）升壓電路1 0 0中，其包括脈波調變控制電路1 1 0、 功率開關1 3 0、發光二極體模組1 4 0、回授電壓檢測器 1 5 0、儲存元件1 6 0、整流二極體1 7 0與電容1 7 6。如熟悉此 技藝者可輕易知曉，功率開關1 3 0可以是N型或P型金屬氧 化物半導體場效電晶體，發光二極體模組1 4 0可以是由一 個或多個發光二極體1 4 2組成，回授電壓檢測器1 5 0可以是 電阻，儲存元件1 6 0可以是電感，整流二極體1 7 0可以是蕭11956twf.ptd Page 10 1232071 V. Description of the invention (6) The pole is a current that flows from the first end of the rectifying diode to the second end of the rectifying diode. According to a preferred embodiment of the present invention, the aforementioned non-linear load is a light emitting diode module composed of one or more light emitting diodes. Because the present invention uses an adjustable triangle wave generator, it can modulate triangle waves with different amplitudes according to the difference between the feedback voltage and a preset reference voltage to reduce the response time of the circuit to reach a steady state. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, a preferred embodiment is described below in detail with the accompanying drawings as follows: Implementation: In this embodiment, The biggest technical feature is to design an adjustable triangle wave generator, so that the pulse wave modulation control circuit can control the power switch more accurately, and reduce the steady response of the light-emitting diode boost circuit, please refer to Figure 1. It shows a light-emitting diode boost circuit according to a preferred embodiment of the present invention. The light-emitting diode (non-linear load) booster circuit 100 of FIG. 1 includes a pulse wave modulation control circuit 1 1 0, a power switch 1 3 0, a light-emitting diode module 1 4 0, Feedback voltage detector 150, storage element 160, rectifier diode 170 and capacitor 176. As those skilled in the art can easily know, the power switch 130 can be an N-type or P-type metal oxide semiconductor field effect transistor, and the light-emitting diode module 1 40 can be composed of one or more light-emitting diodes. 1 4 2 composition, the feedback voltage detector 1 50 can be a resistor, the storage element 16 0 can be an inductor, and the rectifying diode 1 7 0 can be Xiao

11956twf.ptd 第11頁 1232071 五、發明說明（7) 特基二極體，但均不以此為限。其中，脈波調變控制電路 110包括可調式三角波產生器112、誤差信號產生器114、 比較器116、參考電壓產生器118與驅動電路丨20。 在本實施例中，其耦接關係為儲存元件丨6 〇之一端電 性耦接至電壓源，另一端電性耦接至整流二極體丨7 〇之輸 入端1 7 2，功率開關1 3 0之第一端1 3 2電性耦接至驅動電路 1 2 0 ，功率開關1 3 0之第二端1 3 4電性耦接至電感1 6 〇，功率 開關1 3 0之第三端1 3 6電性耦接至接地端。發光二極體模組 140之輸入端144電性耦接至整流二極體17〇之輸出端174， 發光二極體模組1 4 0之輸出端1 4 6電性耦接至回授電壓檢測 器1 5 0之第一端1 5 2，回授電壓檢測器丨5 〇之第二端丨5 4則電 性耦接至接地端。電容1 7 6則分別電性耦接至發光二極體 模組140之輸入端144與接地端。參考電壓產生器ns分別 電性轉接至可調式三角波產生器112與誤差信號產生器114 之正端，誤差信號產生器114之負端電性耦接至回授電壓 檢測器1 5 0之第一端1 5 2。可調式三角波產生器丨丨2電性耦 接至回授電壓檢測器150之第一端152與比較器116之負 端’比較器1 1 6之正端電性耦接至誤差信號產生器丨丨*之輸 出端，比較器1 1 6之輸出端電性耦接至驅動電路丨2 〇。 在本實施例中，發光二極體升壓電路丨〇 〇之升壓動作 為功率開關130係由脈波調變控制電路丨1〇發出 來控制是否導通。當功率開關130被導通時，由電壓㉟原/至就 ，存元件160與功率開關130將形成一充電路徑，而電壓源 供給之電能將被以電流形式儲存於儲存元件丨6 〇之内。反11956twf.ptd Page 11 1232071 V. Description of the invention (7) Tiki diodes, but not limited to them. The pulse wave modulation control circuit 110 includes an adjustable triangle wave generator 112, an error signal generator 114, a comparator 116, a reference voltage generator 118, and a driving circuit 20. In this embodiment, the coupling relationship is that one end of the storage element 6 is electrically coupled to the voltage source, and the other end is electrically connected to the input terminal 1 7 2 of the rectifier diode 7 2 and the power switch 1 The first end of 3 0 1 3 2 is electrically coupled to the driving circuit 1 2 0, the second end of the power switch 1 3 0 is electrically coupled to the inductor 1 6 0, and the third end of the power switch 1 3 0 Terminal 1 3 6 is electrically coupled to the ground terminal. The input terminal 144 of the light emitting diode module 140 is electrically coupled to the output terminal 174 of the rectifying diode 170, and the output terminal 1 4 6 of the light emitting diode module 140 is electrically coupled to the feedback voltage. The first terminal 15 2 of the detector 150 and the second terminal 5 4 of the feedback voltage detector 5 50 are electrically coupled to the ground terminal. The capacitor 176 is electrically coupled to the input terminal 144 and the ground terminal of the light emitting diode module 140, respectively. The reference voltage generator ns is electrically transferred to the positive ends of the adjustable triangle wave generator 112 and the error signal generator 114, and the negative terminal of the error signal generator 114 is electrically coupled to the feedback voltage detector 1 50. One end 1 5 2. Adjustable triangle wave generator 丨 2 is electrically coupled to the first terminal 152 of the feedback voltage detector 150 and the negative terminal of the comparator 116 'the positive terminal of the comparator 1 1 6 is electrically coupled to the error signal generator 丨The output terminal of * is electrically coupled to the driving circuit of the comparator 1 16. In this embodiment, the boosting action of the light-emitting diode boosting circuit 丨 00 is that the power switch 130 is issued by the pulse wave modulation control circuit 丨 10 to control whether it is turned on. When the power switch 130 is turned on, the storage element 160 and the power switch 130 will form a charging path from the voltage source to the original, and the electric energy supplied by the voltage source will be stored in the storage element in the form of current. anti-

H956twf .Ptd 第12頁 1232071 五、發明說明（8) 之，當功率開關1 3 0被關閉時，由儲存元件1 6 0、整流二極 體170、發光二極體模組140與電容176將形成一迴路，所 以儲存在儲存元件1 6 0内之電流將經由整流二極體1 7 0流至 電容176與發光二極體模組140中，完成了整個升壓的過 程。 在本實施例中，產生控制功率開關1 3 0之驅動訊號之 動作為脈波調變控制電路1 1 0由回授電壓檢測器1 5 0偵測得 到發光二極體模組1 4 0負載的電流後送回所產生之回授電 壓。送回之回授電壓將輸入至誤差信號產生器114的負 端，而參考電壓產生器118之參考電壓被輸入至誤差信號 產生器114的正端。接著，回授電壓與參考電壓間的誤差 可經由誤差信號產生器1 1 4積分產生誤差信號（誤差積分 信號）。如熟悉此技藝者可輕易知曉，誤差信號產生器 1 1 4可以例如是誤差積分器，以獲得更佳的抗雜訊能力。 請合併參照第1圖與第2 A圖。此第2 A圖是繪示依照本 發明一較佳實施例的一種發光二極體升壓電路之可調式三 角波產生器產生之分段性調變振幅之三角波示意圖。 在本實施例中，可調式三角波產生器1 1 2亦接收由回 授電壓檢測器1 5 0偵測送回的回授電壓，並判斷回授電壓 與參考電壓的差值，以適度的調整可調式三角波產生器 112的所輸出之三角波的振幅。當回授電壓與參考電壓間 的差值很大時（例如是大於一暫態電壓，此暫態電壓可依 不同電路作不同之設定），發光二極體升壓電路100通常 係處於啟始狀態。此時，發光二極體升壓電路1 0 0需要靈H956twf .Ptd Page 121232071 V. Description of the invention (8) When the power switch 130 is turned off, the storage element 160, the rectification diode 170, the light emitting diode module 140 and the capacitor 176 will A loop is formed, so the current stored in the storage element 160 will flow through the rectifier diode 170 to the capacitor 176 and the light emitting diode module 140, completing the entire boosting process. In this embodiment, the action of generating the driving signal for controlling the power switch 1 3 0 is the pulse wave modulation control circuit 1 1 0 and the light-emitting diode module 1 4 0 is detected by the feedback voltage detector 1 5 0. After the current is returned, the generated feedback voltage is returned. The returned feedback voltage is input to the negative terminal of the error signal generator 114, and the reference voltage of the reference voltage generator 118 is input to the positive terminal of the error signal generator 114. Then, the error between the feedback voltage and the reference voltage can be integrated by the error signal generator 1 1 4 to generate an error signal (error integrated signal). As those skilled in the art can easily know, the error signal generator 1 1 4 can be, for example, an error integrator to obtain better anti-noise capability. Please refer to Figure 1 and Figure 2A together. FIG. 2A is a schematic diagram showing a triangular wave with a stepwise modulation amplitude generated by an adjustable triangular wave generator of a light emitting diode boost circuit according to a preferred embodiment of the present invention. In this embodiment, the adjustable triangle wave generator 1 12 also receives the feedback voltage sent back by the feedback voltage detector 1 50, and judges the difference between the feedback voltage and the reference voltage to adjust it appropriately. The amplitude of the triangle wave output from the adjustable triangle wave generator 112. When the difference between the feedback voltage and the reference voltage is large (for example, it is greater than a transient voltage, this transient voltage can be set differently according to different circuits), the light-emitting diode boost circuit 100 is usually at the beginning. status. At this time, the light-emitting diode boost circuit 1 0 0 needs a spirit.

11956twf.ptd 第13頁 1232071 五、發明說明（9) 敏度高的回路時間常數，以加速發光二極體升壓電路1 〇 〇 的暫態響應。因此，可調式三角波產生器1 1 2此時會自動 調整比較器116的高輸入電壓（正端）與低輸入電壓（負 端）及充電與放電電流，調變出振幅較小的三角波（例如 是第2 A圖繪示之第一振幅2 0 2 )。 當回授電壓與參考電壓間的差值逐漸由大減小時，表 示發光二極體升壓電路100處於往參考電壓趨近的暫態狀 態，發光二極體升壓電路1 0 0回路時間常數的靈敏度將由 高逐漸降低，以避免發光二極體升壓電路1 0 0在暫態發生 超越參考電壓值過多的情形。因此，可調式三角波產生器 112此時會自動調整比較器116的高輸入電壓（正端）與低 輸入電壓（負端）及充電與放電電流，以調變出振幅逐漸 增大的三角波（例如是第2 A圖繪示之第二振幅2 0 4 )。 當回授電壓與參考電壓間的差值很接近時，表示發光 二極體升壓電路1 0 0處於接近穩定狀態，此時發光二極體 升壓電路1 0 0需要靈敏度低的回路時間常數，以增加發光 二極體升壓電路1 0 0的穩態穩定度。因此，可調式三角波 產生器1 1 2此時會自動調整比較器1 1 6的高低輸入電壓（正 端）及充電與放電電流，調變出振幅較大的三角波（例如 是第2A圖繪示之第三振幅206)。 在本實施例中，可調式三角波產生器1 1 2產生之三角 波被傳送至比較器1 1 6的負端，而誤差信號被傳送至比較 器1 1 6的正端。最後，比較器1 1 6在比較這二組信號後，輸 出控制訊號至驅動電路1 2 0。驅動電路1 2 0則在將控制訊號11956twf.ptd Page 13 1232071 V. Description of the invention (9) High-sensitivity loop time constant to accelerate the transient response of the light-emitting diode boost circuit 1 00. Therefore, the adjustable triangle wave generator 1 1 2 will now automatically adjust the high input voltage (positive terminal) and low input voltage (negative terminal) and the charging and discharging current of the comparator 116 to modulate a triangular wave with a smaller amplitude (for example, It is the first amplitude 2 0 2 shown in Figure 2A). When the difference between the feedback voltage and the reference voltage gradually decreases from large, it indicates that the light-emitting diode boost circuit 100 is in a transient state approaching the reference voltage, and the light-emitting diode boost circuit 100 loop time constant The sensitivity of the LED will gradually decrease from high to avoid the situation that the light-emitting diode boost circuit 100 exceeds the reference voltage too much in the transient state. Therefore, the adjustable triangle wave generator 112 will automatically adjust the high input voltage (positive terminal) and low input voltage (negative terminal) and the charging and discharging current of the comparator 116 at this time to modulate a triangular wave with a gradually increasing amplitude (for example, It is the second amplitude 2 0 4 shown in Figure 2A). When the difference between the feedback voltage and the reference voltage is very close, it indicates that the light-emitting diode boost circuit 100 is close to a stable state. At this time, the light-emitting diode boost circuit 100 needs a low-sensitivity loop time constant. To increase the steady-state stability of the light-emitting diode boost circuit 100. Therefore, the adjustable triangle wave generator 1 1 2 will automatically adjust the high and low input voltage (positive side) and the charging and discharging current of the comparator 1 16 at this time to modulate a triangle wave with a larger amplitude (for example, shown in Figure 2A) Third amplitude 206). In this embodiment, the triangular wave generated by the adjustable triangular wave generator 1 12 is transmitted to the negative terminal of the comparator 1 16, and the error signal is transmitted to the positive terminal of the comparator 1 16. Finally, the comparator 1 16 outputs the control signal to the driving circuit 120 after comparing the two sets of signals. The driving circuit 1 2 0 is controlling the signal

11956twf.ptd 第14頁 1232071 五、發明說明（ίο) 轉換為驅動訊號後輸出至功率開關1 3 0 請同時參照第2 A圖與第2 B圖，第2 B圖係繪示依照本發 明一較佳實施例的一種發光二極體升壓電路之可調式三角 波產生器產生之連續性調變振幅之三角波示意圖。在第2 A 圖中，其係以分段性方式來調整可調式三角波產生器1 1 2 輸出之三角波的振幅。而在本實施例中，可調式三角波產 生器1 1 2還可以連續性方式來調整輸出之三角波的振幅， 如第2 B圖所示。 接著請參照第3圖，其繪示依照本發明一較佳實施例 的一種發光二極體升壓電路之可調式三角波產生器電路 圖。在本實施例中，僅解說一種可調式三角波產生器之電 路，而在設計人員設計可調式三角波產生器1 1 2時自當不 以此為限。此可調式三角波產生器1 1 2包括第一比較器 302、第二比較器304、反及閘（NAND)306與308、第三比 較器3 1 0、開關3 1 2與3 1 4、充電電流源3 1 6、放電電流源 318與電容3 2 0。 在本實施例中，當處於充電的狀態時，開關3 1 2將被 第三比較器3 1 0關閉，使得充電電流源3 1 6能將電流充至電 容3 2 0。此時，可調式三角波產生器1 1 2所輸出之三角波將 逐漸上昇（振幅變大）。當三角波所代表之電壓值（振幅 )上昇高於第一比較電壓（VH )時，第一比較器3 0 2輸出 之電壓會下降至邏輯0所代表之電位。此時，反及閘306的 輸出電壓會改變而上昇至邏輯1代表之電位。而由於充電 的過程中三角波代表之電位會高於第二比較電壓（VL)，11956twf.ptd Page 141232071 V. Description of the invention (ίο) After being converted into a driving signal, it is output to the power switch 1 3 0 Please refer to Figure 2A and Figure 2B at the same time. Figure 2B is a drawing according to the present invention. A schematic diagram of a triangular wave of a continuous modulation amplitude generated by an adjustable triangular wave generator of a light-emitting diode boost circuit in a preferred embodiment. In Figure 2A, the amplitude of the triangle wave output by the adjustable triangle wave generator 1 1 2 is adjusted in a segmented manner. In this embodiment, the adjustable triangle wave generator 1 12 can also adjust the amplitude of the triangle wave output in a continuous manner, as shown in FIG. 2B. Next, please refer to FIG. 3, which shows a circuit diagram of an adjustable triangle wave generator of a light-emitting diode boost circuit according to a preferred embodiment of the present invention. In this embodiment, only a circuit of an adjustable triangle wave generator is explained, and when a designer designs the adjustable triangle wave generator 1 12, it should not be limited to this. The adjustable triangle wave generator 1 1 2 includes a first comparator 302, a second comparator 304, inverse gates (NAND) 306 and 308, a third comparator 3 1 0, switches 3 1 2 and 3 1 4, and charging. The current source 3 1 6, the discharge current source 318 and the capacitor 3 2 0. In this embodiment, when in the charging state, the switch 3 1 2 will be turned off by the third comparator 3 1 0, so that the charging current source 3 1 6 can charge the current to the capacitor 3 2 0. At this time, the triangle wave output by the adjustable triangle wave generator 1 12 will gradually rise (the amplitude becomes larger). When the voltage value (amplitude) represented by the triangle wave rises higher than the first comparison voltage (VH), the voltage output by the first comparator 302 will drop to the potential represented by logic 0. At this time, the output voltage of the inverse gate 306 will change and rise to the potential represented by logic 1. Because the potential represented by the triangle wave is higher than the second comparison voltage (VL) during charging,

11956twf.ptd 第15頁 1232071 五、發明說明（11) 所以第二比較器3 0 4輸出之電壓會持續維持在邏輯1代表之 電位。此時，反及閘308的二端輸入、反及閘306的輸出及 第二比較器304的輸出均為邏輯1代表之電位的情況下，反 及閘308輸出之電壓會下降至邏輯0代表之電位。因此，第 三比較器310的正端輸入之邏輯1代表之電位將比負端輸入 之邏輯0代表之電位的位準高。第三比較器310輸出之電壓 則會上昇至邏輯1代表之電位，而重新將開關3 1 6打開，並 中斷充電電流源316對電容320的充電，同時完成充電的過 程。 在本實施例中，當處於放電的狀態時，開關3 1 4將被 第三比較器3 1 0關閉，使得放電電流源3 1 8將電流由電容 3 2 0釋出。因此，三角波所代表之電位將逐漸下降。當三 角波代表之電位下降低於第二比較電壓（V L )時，第二比 較器304輸出之電壓會下降至邏輯0代表之電位。此時，反 及閘308的輸出電壓會改變而上昇至邏輯1代表之電位。由 於放電的過程中，三角波代表之電位將低於第一比較電壓 (VH )，第二比較器3 0 4的輸出電壓會持續維持在邏輯1代 表之電位。此時，反及閘306的二端輸入、反及閘308的輸 出及第一比較器3 0 2的輸出均為邏輯1代表之電位的情況 下，反及閘306的輸出電壓會下降至邏輯0代表之電位。因 此，第三比較器310的正端輸入之邏輯0代表之電位會比負 端輸入之邏輯1代表之電位的位準低，第三比較器310的輸 出會下降至邏輯0代表之電位，並重新將開關3 1 4打開，同 時中斷放電電流源3 1 8對電容3 2 0的放電，以完成放電的過11956twf.ptd Page 15 1232071 V. Description of the invention (11) Therefore, the voltage output by the second comparator 3 0 4 will be maintained at the potential represented by logic 1. At this time, when the two-terminal input of the inverting gate 308, the output of the inverting gate 306, and the output of the second comparator 304 are all potentials represented by logic 1, the voltage of the output of the inverting gate 308 will drop to a logic 0 The potential. Therefore, the potential represented by the logic 1 input to the positive terminal of the third comparator 310 will be higher than the potential represented by the logic 0 input to the negative terminal. The voltage output by the third comparator 310 will rise to the potential represented by logic 1, and the switch 3 16 will be turned on again, and the charging of the capacitor 320 by the charging current source 316 will be interrupted, and the charging process will be completed. In this embodiment, when in the discharging state, the switch 3 1 4 will be closed by the third comparator 3 1 0, so that the discharge current source 3 1 8 releases the current from the capacitor 3 2 0. Therefore, the potential represented by the triangular wave will gradually decrease. When the potential represented by the triangle wave drops below the second comparison voltage (V L), the voltage output by the second comparator 304 will drop to the potential represented by a logic zero. At this time, the output voltage of the anti-gate 308 will change and rise to the potential represented by logic 1. Since the potential represented by the triangular wave will be lower than the first comparison voltage (VH) during the discharge process, the output voltage of the second comparator 304 will continue to be maintained at the potential represented by logic 1. At this time, when the two-terminal input of the inverting gate 306, the output of the inverting gate 308, and the output of the first comparator 302 are all potentials represented by logic 1, the output voltage of the inverting gate 306 will drop to logic 0 represents the potential. Therefore, the potential of the logic 0 represented by the positive input of the third comparator 310 will be lower than the potential of the logic 1 represented by the negative input. Turn the switch 3 1 4 back on, and at the same time interrupt the discharge of the discharge current source 3 1 8 to the capacitor 3 2 0 to complete the discharge.

11956twf.ptd 第16頁 1232071 五、發明說明（12) 程。 在本實施例中，當回授電壓與參考電壓的差距仍大 時，充電電流源3 1 6與放電電流源3 1 8所提供的充電及放電 電流會相對較小（當電壓的差距過大時，有一組最小值）， 第一比較器3 0 2的第一比較電壓V Η會是一組比較低的電 壓，第一比較電壓VH與第二比較電壓VL間的電壓差會相對 較小。此時，可調式三角波產生器1 1 2會產生一組振幅較 小且固定頻率之三角波。 在本實施例中，當回授電壓與參考電壓的差距逐漸接 近時，充電電流源3 1 6與放電電流源3 1 8所提供的充電及放 電電流會隨著逐漸增加，而第一比較器3 0 2的第一比較電 壓VH亦會逐漸上昇，可調式三角波產生器112可因此產生 一組振幅逐漸增加且固定頻率之三角波。 在本實施例中’當回授電壓與參考電壓的差距很接近 時，充電電流源3 1 6與放電電流源3 1 8所提供的充電及放電 電流會接近一最大值，而第一比較器3 0 2的第一比較電壓 VH亦會上昇接近至一最大值。此時，可調式三角波產生器 112可因此產生一組最大振幅且固定頻率之三角波。 接著請參照第4 Α圖與第4 Β圖，其分別繪示繪示依照本 發明一較佳實施例的一種發光二極體升壓電路之誤差信號 產生器電路圖與依照本發明一較佳實施例的另一種發光二 極體升壓電路之誤差信號產生器電路圖。 在本實施例中，當回授信號是電壓型式時，誤差信號 產生器器可以例如是由第4 A圖所繪之以運算放大器11956twf.ptd Page 16 1232071 V. Description of the invention (12) Process. In this embodiment, when the difference between the feedback voltage and the reference voltage is still large, the charging and discharging current provided by the charging current source 3 1 6 and the discharging current source 3 1 8 will be relatively small (when the voltage difference is too large) , There is a set of minimum values), the first comparison voltage V 第一 of the first comparator 3 02 will be a relatively low voltage, and the voltage difference between the first comparison voltage VH and the second comparison voltage VL will be relatively small. At this time, the adjustable triangle wave generator 1 12 will generate a set of triangle waves with small amplitude and fixed frequency. In this embodiment, when the difference between the feedback voltage and the reference voltage is gradually approaching, the charging and discharging currents provided by the charging current source 3 1 6 and the discharging current source 3 1 8 will gradually increase, and the first comparator The first comparison voltage VH of 3 2 will also gradually increase, and the adjustable triangle wave generator 112 can thus generate a set of triangle waves with a gradually increasing amplitude and a fixed frequency. In this embodiment, when the difference between the feedback voltage and the reference voltage is close, the charging and discharging currents provided by the charging current source 3 1 6 and the discharging current source 3 1 8 will approach a maximum value, and the first comparator The first comparison voltage VH of 3 0 2 also rises to a maximum value. At this time, the adjustable triangle wave generator 112 can thus generate a set of triangle waves with a maximum amplitude and a fixed frequency. Next, please refer to FIG. 4A and FIG. 4B, which respectively show a circuit diagram of an error signal generator of a light-emitting diode boost circuit according to a preferred embodiment of the present invention and a preferred implementation according to the present invention. An example of the error signal generator circuit of another LED boost circuit is shown. In this embodiment, when the feedback signal is a voltage type, the error signal generator may be, for example, an operational amplifier as shown in FIG. 4A.

11956twf.ptd 第17頁 1232071 五、發明說明（13) (Operational Amplifier ，簡稱 〇P) 4 0 2 、電阻R 與電容C 所構成。其中，假設參考電壓是Vref，回授電壓是Vfb, 輸出電壓是V 〇，貝ij V 〇可由以下公式求得：11956twf.ptd Page 17 1232071 V. Description of the Invention (13) (Operational Amplifier, 〇P) 4 0 2, resistor R and capacitor C. Among them, it is assumed that the reference voltage is Vref, the feedback voltage is Vfb, the output voltage is V 〇, and ij ij V 〇 can be obtained by the following formula:

Vo = J (Vfl - Vref )dt 在本實施例中，當回授信號是電壓型式時，誤差積分 器可以例如是由第4 B圖所繪之以運算互導放大器 (Operational Transconductance Amplifier ，簡稱OTA )404與電容C所構成。其中，假設參考電壓是Vref，回 授電壓是Vfb，輸出電壓是Vo，則則Vo可由以下公式求 得· ν〇 = __J (Vfb - Vref )dt 其中，在第4A圖與第4B圖中，誤差積分器可以將電壓 型式的回授電壓與參考電壓比較之後的誤差以對時間軸積 分的方式平均之後輸出。 、 f本發明之較佳實施例中，儲存元件丨6 〇係電性耦接 至電壓源。儲存元件丨6 〇在功率開關丨3 〇被關閉時，以電流 形式儲存電壓源供給之電壓，並於功率開關1 3 〇被導通 時，釋出電流。 在本發明之較佳實施例中，電容丨7 6在功率開關丨3 〇被Vo = J (Vfl-Vref) dt In this embodiment, when the feedback signal is a voltage type, the error integrator may be, for example, an Operational Transconductance Amplifier (OTA) ) 404 and capacitor C. Among them, assuming that the reference voltage is Vref, the feedback voltage is Vfb, and the output voltage is Vo, then Vo can be obtained by the following formula: ν〇 = __J (Vfb-Vref) dt where, in Figures 4A and 4B, The error integrator can average the error after comparing the feedback voltage of the voltage type with the reference voltage, and then output it after integrating the time axis. F In a preferred embodiment of the present invention, the storage element 6 is electrically coupled to a voltage source. The storage element 6 stores the voltage supplied by the voltage source in the form of current when the power switch 3 is turned off, and releases the current when the power switch 13 is turned on. In a preferred embodiment of the present invention, the capacitor 丨 7 6 is connected to the power switch 丨 3 〇

11956twf.ptd11956twf.ptd

1232071 五、發明說明（14) 導通時儲存一儲存電壓，並於功率開關1 3 0被關閉時，釋 出儲存電壓，以供給驅動發光二極體模組所需之電能。 綜合以上所述，本發明之非線性負載升壓電路具下列 優點： (1 )本發明之非線性負載升壓電路，係利用可調變 振幅的三角波產生器有效改善非線性負載升壓電路的暫態 響應。 (2 )本發明之非線性負載升壓電路，可依據較佳穩 態響應的條件設定非線性負載升壓電路的時間常數，使非 線性負載升壓電路能同時具備穩態穩定度和優良的暫態響 應。 (3 )本發明之非線性負載升壓電路，可大幅預防非 線性負載升壓電路響應超過系統目標值的發生。 (4 )本發明之非線性負載升壓電路，可減少非線性 負載升壓電路到達穩態的響應時間。 (5 )本發明之非線性負載升壓電路，利用誤差積分 器代替誤差放大器可獲得更佳的抗雜訊能力。 (6 )本發明之非線性負載升壓電路中，整個脈波調 變控制電路中主要的控制元件，可以製作於同一個積體電 Integrated Circuit, 1C)上。 雖然本發明已以一較佳實施例揭露如上，然其並非用 以限定本發明，任何熟習此技藝者，在不脫離本發明之精 神和範圍内，當可作些許之更動與潤飾，因此本發明之保 護範圍當視後附之申請專利範圍所界定者為準。1232071 V. Description of the invention (14) Store a stored voltage when turned on, and release the stored voltage when the power switch 130 is turned off to supply the power required to drive the light-emitting diode module. To sum up, the non-linear load booster circuit of the present invention has the following advantages: (1) The non-linear load booster circuit of the present invention uses a triangular wave generator with adjustable amplitude to effectively improve the performance of the non-linear load booster circuit. Transient response. (2) The non-linear load boost circuit of the present invention can set the time constant of the non-linear load boost circuit according to the conditions of better steady-state response, so that the non-linear load boost circuit can have both steady-state stability and excellent Transient response. (3) The non-linear load boost circuit of the present invention can greatly prevent the non-linear load boost circuit from responding to exceeding the system target value. (4) The non-linear load boosting circuit of the present invention can reduce the response time for the non-linear load boosting circuit to reach a steady state. (5) The non-linear load boosting circuit of the present invention can obtain better anti-noise ability by using an error integrator instead of an error amplifier. (6) In the non-linear load boost circuit of the present invention, the main control elements in the entire pulse wave modulation control circuit can be fabricated on the same integrated circuit (1C). Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes and retouch without departing from the spirit and scope of the present invention. The scope of protection of the invention shall be determined by the scope of the attached patent application.

11956twf.ptd 第19頁 1232071 圖式簡單說明 第1圖是繪示依照本發明一較佳實施例的一種以發光 二極體達成非線性負載升壓電路的電路圖。 第2 A圖是繪示依照本發明一較佳實施例的一種發光二 極體升壓電路之可調式三角波產生器產生之分段性調變振 幅之二角波不意圖。 第2 B圖是繪示依照本發明一較佳實施例的一種發光二 極體升壓電路之可調式三角波產生器產生之連續性調變振 幅之三角波示意圖。 第3圖是繪示依照本發明一較佳實施例的一種發光二 極體升壓電路之可調式三角波產生器電路圖。 第4 A圖是繪示依照本發明一較佳實施例的一種發光二 極體升壓電路之誤差信號產生器電路圖。 第4 B圖是繪示依照本發明一較佳實施例的另一種發光 二極體升壓電路之誤差信號產生器電路圖。 第5圖係習知一種發光二極體升壓電路圖。 第6圖係習知一種發光二極體升壓電路之固定式三角 波產生器之三角波示意圖。 圖式標示說明： 100，500 :發光二極體升壓電路 1 1 0，5 1 0 :脈波調變控制電路 1 1 2 ··可調式三角波產生器 1 1 4 :誤差信號產生器 1 1 6 ，5 1 6 :比較器 118 ，518 :參考電壓產生器11956twf.ptd Page 19 1232071 Brief Description of Drawings Figure 1 is a circuit diagram showing a non-linear load boosting circuit using a light emitting diode according to a preferred embodiment of the present invention. FIG. 2A is a schematic diagram illustrating a two-dimensional angular wave of a segmented modulation amplitude generated by an adjustable triangular wave generator of a light emitting diode boost circuit according to a preferred embodiment of the present invention. FIG. 2B is a schematic diagram illustrating a triangular wave of a continuous modulation amplitude generated by an adjustable triangular wave generator of a light emitting diode boost circuit according to a preferred embodiment of the present invention. FIG. 3 is a circuit diagram of an adjustable triangle wave generator of a light-emitting diode boost circuit according to a preferred embodiment of the present invention. FIG. 4A is a circuit diagram of an error signal generator of a light-emitting diode boost circuit according to a preferred embodiment of the present invention. FIG. 4B is a circuit diagram of an error signal generator of another light-emitting diode boost circuit according to a preferred embodiment of the present invention. Fig. 5 is a conventional booster circuit diagram of a light emitting diode. Fig. 6 is a schematic diagram of a triangular wave of a fixed triangular wave generator of a conventional light-emitting diode boost circuit. Description of diagrams: 100,500: Light-emitting diode boost circuit 1 1 0, 5 1 0: Pulse wave modulation control circuit 1 1 2 ·· Adjustable triangle wave generator 1 1 4: Error signal generator 1 1 6, 5 1 6: Comparators 118, 518: Reference voltage generator

11956twf.ptd 第20頁 1232071 圖式簡單說明 120，520 :驅動電路 1 3 0 ，5 3 0 :功率開關 132 ，1 52 :第一端 1 34 ，154 :第二端 1 36 :第三端 1 4 0，5 4 0 :發光二極體模組 142，542 :發光二極體 1 44，1 72 :輸入端 1 46 ，1 74 :輸出端 1 5 0 :回授電壓檢測器 1 6 0 ··儲存元件 1 7 0，5 7 0 :整流二極體 176 ，320 ，576 ，C :電容 2 0 2 :第一振幅 2 0 4 :第二振幅 2 0 6 :第三振幅 3 0 2 :第一比較器 3 0 4 :第二比較器 3 0 6，3 0 8 :反及閘 3 1 0 :第三比較器 3 1 2 ，3 1 4 :開關 3 1 6 :充電電流源 3 1 8 :放電電流源 4 0 2 :運算放大器11956twf.ptd Page 20 1232071 Brief description of the drawings 120, 520: drive circuit 1 3 0, 5 3 0: power switch 132, 1 52: first end 1 34, 154: second end 1 36: third end 1 4 0, 5 4 0: Light-emitting diode module 142, 542: Light-emitting diode 1 44, 1 72: Input terminal 1 46, 1 74: Output terminal 1 5 0: Feedback voltage detector 1 6 0 · Storage element 17 0, 5 7 0: rectified diodes 176, 320, 576, C: capacitor 2 02: first amplitude 2 0 4: second amplitude 2 0 6: third amplitude 3 0 2: first A comparator 3 0 4: a second comparator 3 0 6, 3 0 8: an inverse gate 3 1 0: a third comparator 3 1 2, 3 1 4: a switch 3 1 6: a charging current source 3 1 8: Discharge current source 4 0 2: Operational amplifier

11956twf.ptd 第21頁 1232071 圖式簡單說明 404 :運算互導放大器 512 :固定式三角波產生器 5 1 4 :誤差放大器 5 5 0 ，R ··電阻 5 6 0 :電感 602 :三角波 6 0 4 :誤差輸出信號 6 0 6 :脈波輸出信號11956twf.ptd Page 21 1232071 Simple description of the diagram 404: Operational transconductance amplifier 512: Fixed triangle wave generator 5 1 4: Error amplifier 5 5 0, R ·· Resistor 5 6 0: Inductance 602: Triangle wave 6 0 4: Error output signal 6 0 6: Pulse output signal

11956twf.ptd 第22頁11956twf.ptd Page 22

Claims (1)

1232071 六、申請專利範圍 1 . 一種非線性負載升壓電路，係電性耦接至一電流 源，包括： 一非線性負載，具有一輸入端與一輸出端，該非線性 負載係電性耦接至該電流源，並使該電流源供給之一電流 從該非線性負載之該輸入端流向該非線性負載之該輸出 端； 一回授電壓檢測器，具有一第一端與一第二端，該回 授電壓檢測器之該第一端電性耦接至該非線性負載之該輸 出端，該回授電壓檢測之該苐二端電性搞接至^一接地 端，用以根據該非線性負載傳來之該電流產生一回授電 壓； 一脈波調變控制電路，電性耦接至該回授電壓檢測器 之該第一端，該脈波調變控制電路包括： 一可調式三角波產生器，係以一參考電壓與該回 授電壓作運算，並輸出根據該非線性負載目前之一工作狀 態而調整振幅大小之一三角波； 一誤差信號產生器，電性耦接至該回授電壓檢測 器，用以對該回授電壓與該參考電壓作運算，並輸出一誤 差信號；以及 一比較器，電性耦接至該可調式三角波產生器與 該誤差信號產生器，用以比較該誤差信號與該三角波電 壓，並輸出一控制訊號； 一驅動電路，電性耦接至該比較器，接收並轉換 該控制訊號，用以輸出一驅動訊號；以及1232071 6. Scope of patent application 1. A non-linear load booster circuit electrically coupled to a current source includes: a non-linear load having an input end and an output end, the non-linear load is electrically coupled To the current source and causing the current source to supply a current flowing from the input terminal of the non-linear load to the output terminal of the non-linear load; a feedback voltage detector having a first terminal and a second terminal, the The first terminal of the feedback voltage detector is electrically coupled to the output terminal of the non-linear load, and the second terminal of the feedback voltage detector is electrically connected to a ground terminal for transmitting the voltage according to the non-linear load. The current generates a feedback voltage. A pulse modulation control circuit is electrically coupled to the first end of the feedback voltage detector. The pulse modulation control circuit includes: an adjustable triangle wave generator , Based on a reference voltage and the feedback voltage to calculate, and output a triangle wave whose amplitude is adjusted according to the current working state of the non-linear load; an error signal generator, which is electrically coupled to the A feedback voltage detector for calculating the feedback voltage and the reference voltage and outputting an error signal; and a comparator electrically coupled to the adjustable triangle wave generator and the error signal generator, Comparing the error signal with the triangle wave voltage and outputting a control signal; a driving circuit electrically coupled to the comparator, receiving and converting the control signal for outputting a driving signal; and 11956twf.ptd 第23頁 1232071 六、申請專利範圍 一功率開關，具有一第一端、一第二端與一第三端， 該功率開關之該第一端電性耦接至該驅動電路，該功率開 I關之該第二端電性耦接至該電流源，該功率開關之該第三 端電性耦接至該接地端，該功率開關係根據該驅動訊號決 定導通與否； 其中，當該功率開關被關閉時，該電流源供給該電流 給該非線性負載，反之，當該功率開關被導通時，該電流 源停止供給該電流給該非線性負載。 2.如申請專利範圍第1項所述之非線性負載升壓電 路，其中該非線性負載之該工作狀態包括一啟始狀態、一 暫態狀態與一穩定狀態。 3 .如申請專利範圍第2項所述之非線性負載升壓電 路，其中當該回授電壓與該參考電壓之差值超過預設之一 暫態電壓時，該非線性負載升壓電路工作在該啟始狀態， 且由該可調式三角波產生器輸出包括一第一振幅之該三角 波。 4.如申請專利範圍第3項所述之非線性負載升壓電 路，其中當該回授電壓與該參考電壓之差值低於該暫態電 壓時，該非線性負載升壓電路工作在該暫態狀態，且由該 可調式三角波產生器輸出包括漸進增大振幅之一第二振幅 之該三角波。 5 .如申請專利範圍第2項所述之非線性負載升壓電 路，其中當該回授電壓大致等於該參考電壓時，該非線性 負載升壓電路工作在該穩定狀態，且由該可調式三角波產11956twf.ptd Page 23 1232071 Six. Patent application scope A power switch with a first end, a second end and a third end, the first end of the power switch is electrically coupled to the driving circuit, the The second terminal of the power on / off is electrically coupled to the current source, the third terminal of the power switch is electrically coupled to the ground terminal, and the power on relationship determines whether it is conductive or not according to the driving signal; wherein, When the power switch is turned off, the current source supplies the current to the non-linear load. Conversely, when the power switch is turned on, the current source stops supplying the current to the non-linear load. 2. The non-linear load boosting circuit according to item 1 of the scope of patent application, wherein the working state of the non-linear load includes an initial state, a transient state, and a stable state. 3. The non-linear load booster circuit according to item 2 of the scope of patent application, wherein when the difference between the feedback voltage and the reference voltage exceeds a preset transient voltage, the non-linear load booster circuit works at In the initial state, the triangle wave with a first amplitude is output from the adjustable triangle wave generator. 4. The non-linear load booster circuit as described in item 3 of the scope of patent application, wherein when the difference between the feedback voltage and the reference voltage is lower than the transient voltage, the non-linear load booster circuit works in the temporary load. State and the adjustable triangle wave generator outputs the triangle wave including a second amplitude that gradually increases one of the amplitudes. 5. The non-linear load booster circuit according to item 2 of the scope of patent application, wherein when the feedback voltage is approximately equal to the reference voltage, the non-linear load booster circuit works in the stable state and is controlled by the adjustable triangle wave Produce 11956twf.ptd 第24頁 1232071 六、申請專利範圍 生器輸出包括一第三振幅之該三角波。 6 .如申請專利範圍第1項所述之非線性負載升壓電 路，其中該脈波調變控制電路更包括一參考電壓產生器， 電性耦接至該可調式三角波產生器與該誤差信號產生器， 用以提供該參考電壓。 7 .如申請專利範圍第1項所述之非線性負載升壓電 路，其中該電流源包括一儲存元件，電性搞接至一電壓 源，用以在該功率開關被關閉時，以電流形式儲存該電壓 源供給之電能，並於該功率開關被導通時，釋出該電流。 8 .如申請專利範圍第1項所述之非線性負載升壓電 路，更包括一電容，電性耦接至該非線性負載之該第一端 與該接地端，用以於該功率開關被導通時儲存一儲存電 壓，並於該功率開關被關閉時，釋出該儲存電壓，以供給 驅動該非線性負載所需之電能。 9 .如申請專利範圍第1項所述之非線性負載升壓電 路，更包括一整流二極體，具有一第一端與一第二端，該 整流二極體之該第一端電性耦接至該電流源，該整流二極 體電性耦接至該非線性負載之該第一端，用以使該電流係 從該整流二極體之該第一端流向該整流二極體之該第二 端。 I 0 .如申請專利範圍第9項所述之非線性負載升壓電 路，其中該整流二極體包括蕭特基二極體。 II .如申請專利範圍第1項所述之非線性負載升壓電 路，其中該非線性負載係為發光二極體。11956twf.ptd Page 24 1232071 6. Scope of patent application The output of the generator includes the triangular wave with a third amplitude. 6. The non-linear load boosting circuit according to item 1 of the scope of patent application, wherein the pulse wave modulation control circuit further includes a reference voltage generator electrically coupled to the adjustable triangle wave generator and the error signal. A generator for providing the reference voltage. 7. The non-linear load boosting circuit according to item 1 of the scope of patent application, wherein the current source includes a storage element electrically connected to a voltage source, and is used as a current when the power switch is turned off. The electric energy supplied by the voltage source is stored, and the current is released when the power switch is turned on. 8. The non-linear load boosting circuit as described in item 1 of the scope of patent application, further comprising a capacitor electrically coupled to the first terminal and the ground terminal of the non-linear load for being turned on by the power switch. A stored voltage is stored at times, and when the power switch is turned off, the stored voltage is released to supply the power required to drive the non-linear load. 9. The non-linear load boosting circuit according to item 1 of the scope of patent application, further comprising a rectifying diode having a first end and a second end, and the first end of the rectifying diode is electrically Coupled to the current source, the rectifying diode is electrically coupled to the first end of the non-linear load, so that the current flows from the first end of the rectifying diode to the rectifying diode The second end. I 0. The non-linear load boosting circuit according to item 9 of the scope of the patent application, wherein the rectifier diode includes a Schottky diode. II. The non-linear load boosting circuit according to item 1 of the scope of patent application, wherein the non-linear load is a light emitting diode. 11956twf.ptd 第25頁 1232071 六、申請專利範圍 1 2 .如申請專利範圍第1項所述之非線性負載升壓電 路，其中該功率開關係為N型金屬氧化物半導體型場效電 晶體。 1 3 .如申請專利範圍第1項所述之非線性負載升壓電 路，其中該功率開關係為p型金屬氧化物半導體型場效電 晶體。 1 4. 一種發光二極體升壓電路，係電性耦接至一電流 源，包括： 一發光二極體模組，具有一輸入端與一輸出端，該發 光二極體模組係電性耦接至該電流源，並使該電流源供給 之一電流從該發光二極體模組之該輸入端流向該發光二極 體模組之該輸出端； 一回授電壓檢測器，具有一第一端與一第二端，該回 授電壓檢測器之該第一端電性耦接至該發光二極體模組之 該輸出端，該回授電壓檢測器之該第二端電性耦接至一接 地端，用以根據該發光二極體模組傳來之該電流產生一回 授電壓； 一脈波調變控制電路，電性耦接至該回授電壓檢測器 之該第一端，該脈波調變控制電路包括： 一可調式三角波產生器，係以一參考電壓與該回 授電壓作運算，並輸出根據該發光二極體模組目前之一工 作狀態而調整振幅大小之一三角波； 一誤差信號產生器，電性耦接至該回授電壓檢測 器，用以對該回授電壓與該參考電壓作運算，並輸出一誤11956twf.ptd Page 25 1232071 6. Scope of patent application 1 2. The non-linear load booster circuit described in item 1 of the scope of patent application, wherein the power on relationship is an N-type metal oxide semiconductor field effect transistor. 13. The non-linear load boosting circuit according to item 1 of the scope of patent application, wherein the power-on relationship is a p-type metal oxide semiconductor field effect transistor. 1 4. A light-emitting diode boost circuit, which is electrically coupled to a current source, includes: a light-emitting diode module having an input terminal and an output terminal. The light-emitting diode module is electrically Is coupled to the current source, and causes a current supplied by the current source to flow from the input terminal of the light emitting diode module to the output terminal of the light emitting diode module; a feedback voltage detector having A first terminal and a second terminal, the first terminal of the feedback voltage detector is electrically coupled to the output terminal of the light emitting diode module, and the second terminal of the feedback voltage detector is electrically connected Is coupled to a ground terminal to generate a feedback voltage according to the current from the light-emitting diode module; a pulse modulation control circuit is electrically coupled to the feedback voltage detector. At the first end, the pulse wave modulation control circuit includes: an adjustable triangle wave generator that calculates a reference voltage and the feedback voltage and outputs an output that is adjusted according to the current working state of the light emitting diode module A triangle wave with an amplitude; an error signal generator, electrical Connected to the feedback voltage detector for the feedback voltage and the reference voltage for the operation, and outputs an error 11956twf.ptd 第26頁 1232071_ 六、申請專利範圍 差信號；以及 一比較器，電性耦 該誤差信號產生器，用以比 輸出一控制訊號； 一驅動電路，電性 該控制訊號，用以輸出一驅 一功率開關，具有一第 該功率開關之該第一端電性 關之該第二端電性耦接至該 端電性耦接至該接地端，該 定導通與否； 其中，當該功率開關被 給該發光二極體模組，以完 被導通時，該電流源停止供 組0 1 5 .如申請專利範圍第1 路，其中該工作狀態包括一 定狀態。 1 6 ·如申請專利範圍第1 路，其中當該回授電壓與該 暫態電壓時，該發光二極體 且由該可調式三角波產生器 波。 1 7.如申請專利範圍第1 與並 器， 生波 產角 波三 角該 三與 調信 可差 該誤 至該 接較 換 轉 並 收 接 器 較及 比以 該； 至號 接訊 m动 ，開 端率 三功 第該 一， 與路 端電 二動 第驅 一該 、至 端接 一耦 三決 第號 該訊 之動 032 區 § M. 開該 率據 功根 該係 ，關 源開 流率 電功 流關 電開模 該率體 給功極 供該二 源當光 流，發 電之該 該反給 ，，流 時壓電 閉升該 關成給 電 壓 升 體 極二 光 發 之 述 所 項 4 態 狀 始 啟 穩 1 與 態 狀 態 暫 壓 升 體 極二 光 發 之 述 所 項 5 之 設 預 過 超 值 差 之 壓 考 參 ，角 態三 狀該 始之 啟幅 該振 在一 作第 工一 路括 電包 壓出 升輸 電 壓 升 體 極二 光 發 之 述 所 項 511956twf.ptd Page 26 1232071_ VI. Patent application range difference signal; and a comparator, which is electrically coupled to the error signal generator to output a control signal, and a drive circuit, which is used to output the control signal. A drive and a power switch having a first end of the power switch, the second end of which is electrically closed, the second end of which is electrically coupled to the end, which is electrically connected to the ground, whether the connection is on or not; wherein, when The power switch is given to the light-emitting diode module, and when it is turned on, the current source is stopped for group 0 1. For example, the first circuit of the patent application range, wherein the working state includes a certain state. 16 · As in the first circuit of the patent application scope, when the feedback voltage and the transient voltage, the light-emitting diode is waved by the adjustable triangle wave generator. 1 7. If the first scope of the patent application and the parallel device, the wave generation angle wave triangle, the three and the communication can be wrong, the error should be transferred to the receiver and the receiver compared to the ratio; , The first rate of three powers and the first, and the roadside electric two-action first drive one, to the end of a coupling three-decision No. of the news of the movement 032 area § M. Open the rate according to the system, Guan Yuankai Flow rate, electric power, current, power off, open the mold, the rate body provides power to the two sources, when the light flow, power generation, the reverse feed, when the current is closed, the voltage is closed, and the voltage rises to the voltage riser body. Item 4: The state of the state starting to stabilize 1 and the state of the state of the temporary pressure rise of the body pole II. The description of the item 5 has a pre-existing value difference. For reference, the angle of the state of the three states should start. The first method includes the electric package to raise the transmission voltage and increase the body voltage. 11956twf.ptd 第27頁 1232071 六、申請專利範圍 路，其中當該回授電壓與該參考電壓之差值低於該暫態電 壓時，該發光二極體升壓電路工作在該暫態狀態，且由該 可調式三角波產生器輸出包括漸進增大振幅之一第二振幅 之該三角波。 1 8 .如申請專利範圍第1 5項所述之發光二極體升壓電 路，其中當該回授電壓大致等於該參考電壓時，該發光二 極體升壓電路工作在該穩定狀態，且由該可調式三角波產 生器輸出包括一第三振幅之該三角波。 1 9 .如申請專利範圍第1 4項所述之發光二極體升壓電 路，其中該脈波調變控制電路更包括一參考電壓產生器， 電性耦接至該可調式三角波產生器與該誤差信號產生器， 用以提供該參考電壓。 2 0 .如申請專利範圍第1 4項所述之發光二極體升壓電 路，其中該電流源包括一儲存元件，電性耦接至一電壓 源，用以在該功率開關被關閉時，以電流形式儲存該電壓 源供給之電能，並於該功率開關被導通時，釋出該電流。 2 1 .如申請專利範圍第1 4項所述之發光二極體升壓電 路，更包括一電容，電性耦接至該發光二極體模組之該第 一端與該接地端，用以於該功率開關被導通時儲存一儲存 電壓，並於該功率開關被關閉時，釋出該儲存電壓，以供 給驅動該發光二極體模組所需之電能。 2 2.如申請專利範圍第1 4項所述之發光二極體升壓電 路，更包括一整流二極體，具有一第一端與一第二端，該 整流二極體之該第一端電性耦接至該電流源，該整流二極11956twf.ptd Page 27 1232071 6. The scope of the patent application, wherein when the difference between the feedback voltage and the reference voltage is lower than the transient voltage, the light-emitting diode boost circuit works in the transient state, And the adjustable triangle wave generator outputs the triangle wave including a second amplitude which gradually increases one of the amplitudes. 18. The light-emitting diode boost circuit according to item 15 of the scope of the patent application, wherein when the feedback voltage is approximately equal to the reference voltage, the light-emitting diode boost circuit works in the stable state, and The adjustable triangle wave generator outputs the triangle wave including a third amplitude. 19. The light-emitting diode boost circuit according to item 14 of the scope of patent application, wherein the pulse wave modulation control circuit further includes a reference voltage generator electrically coupled to the adjustable triangle wave generator and The error signal generator is used to provide the reference voltage. 2 0. The light-emitting diode boost circuit according to item 14 of the scope of patent application, wherein the current source includes a storage element, which is electrically coupled to a voltage source, and is used when the power switch is turned off. The electric energy supplied by the voltage source is stored in the form of current, and the current is released when the power switch is turned on. 2 1. The light-emitting diode boost circuit according to item 14 of the scope of the patent application, further comprising a capacitor, which is electrically coupled to the first terminal and the ground terminal of the light-emitting diode module. Therefore, a stored voltage is stored when the power switch is turned on, and the stored voltage is released when the power switch is turned off, so as to supply electric energy required to drive the light emitting diode module. 2 2. The light-emitting diode boost circuit according to item 14 of the scope of the patent application, further comprising a rectifying diode having a first end and a second end, the first of the rectifying diode being the first The terminal is electrically coupled to the current source, and the rectifying diode 11956twf.ptd 第28頁 1232071_ 六、申請專利範圍 體電性耦接至該發光二極體模組之該第一端，用以使該電 流係從該整流二極體之該第一端流向該整流二極體之該第 二端〇11956twf.ptd page 281232071_ VI. The patent application body is electrically coupled to the first end of the light-emitting diode module, so that the current flows from the first end of the rectifying diode to the The second end of the rectifying diode. 11956twf.ptd 第29頁11956twf.ptd Page 29
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