TWI764346B - Voltage conversion circuit and control method thereof - Google Patents
Voltage conversion circuit and control method thereofInfo
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- TWI764346B TWI764346B TW109137686A TW109137686A TWI764346B TW I764346 B TWI764346 B TW I764346B TW 109137686 A TW109137686 A TW 109137686A TW 109137686 A TW109137686 A TW 109137686A TW I764346 B TWI764346 B TW I764346B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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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]
- G09G3/3208—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] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—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] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/06—Two-wire systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
- G09G2310/0259—Details of the generation of driving signals with use of an analog or digital ramp generator in the column driver or in the pixel circuit
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
Description
本發明係與電壓轉換有關，尤其是關於一種電壓轉換電路及其控制方法。The present invention relates to voltage conversion, in particular to a voltage conversion circuit and a control method thereof.
一般而言，由於主動矩陣有機發光二極體(Active-Matrix Organic Light-Emitting Diode, AMOLED)顯示面板需要正極性與負極性的電源，故常採用單電感雙極性輸出(Single-Inductor Bipolar Output, SIBO)直流-直流電壓轉換器，其具有單一個輸出電感並可將輸入電壓轉換為極性相反的兩個輸出電壓。Generally speaking, since Active-Matrix Organic Light-Emitting Diode (AMOLED) display panels require positive and negative power supplies, a single-inductor bipolar output (SIBO) is often used. ) DC-DC voltage converter that has a single output inductor and converts an input voltage to two output voltages of opposite polarity.
若傳統的SIBO直流-直流電壓轉換器採用有序功率分配控制(Ordered Power Distributive Control, OPDC)的時序控制方式於每一週期均提供電荷給所有的輸出，雖可大幅提高效率，但亦容易產生交越變動效應(Cross regulation effect)，因而導致其電壓轉換效能變差，亟待進一步加以解決。If the traditional SIBO DC-DC voltage converter adopts the sequential control method of ordered power distribution control (OPDC) to provide charge to all outputs in each cycle, although the efficiency can be greatly improved, it is also easy to generate The cross regulation effect, which leads to the deterioration of the voltage conversion performance, needs to be solved urgently.
有鑑於此，本發明提出一種電壓轉換電路及其控制方法，以有效解決先前技術所遭遇到之上述問題。In view of this, the present invention provides a voltage conversion circuit and a control method thereof to effectively solve the above-mentioned problems encountered in the prior art.
依據本發明之一具體實施例為一種電壓轉換電路。於此實施例中，電壓轉換電路包括輸出電感且接收輸入電壓並分別輸出極性相反的第一輸出電壓及第二輸出電壓。電壓轉換電路還包括第一誤差放大器、第二誤差放大器、誤差加總(Error summing)模組、脈寬調變產生模組、控制模組、第一開關、第二開關、第三開關、第四開關及第五開關。第一誤差放大器用以分別接收第一回授電壓及第一參考電壓並輸出第一誤差訊號，其中第一回授電壓與第一輸出電壓有關。第二誤差放大器用以分別接收第二回授電壓及第二參考電壓並輸出第二誤差訊號，其中第二回授電壓與第二輸出電壓有關。誤差加總模組分別耦接第一誤差放大器及第二誤差放大器，用以分別接收第一誤差訊號及第二誤差訊號，並根據第一誤差訊號與第二誤差訊號分別產生第一誤差調變訊號及第二誤差調變訊號。脈寬調變產生模組耦接誤差加總模組，用以分別接收第一誤差調變訊號、第二誤差調變訊號及鋸齒訊號並根據第一誤差調變訊號、第二誤差調變訊號及鋸齒訊號分別產生第一脈寬調變訊號及第二脈寬調變訊號。控制模組耦接脈寬調變產生模組，用以分別接收第一脈寬調變訊號與第二脈寬調變訊號並據以分別產生第一控制訊號及第二控制訊號。第一開關耦接於輸入電壓與輸出電感之第一端之間，且其操作係受控於第一控制訊號。第二開關耦接於輸出電感之第二端與接地端之間，且其操作係受控於第二控制訊號。第三開關耦接於第二輸出電壓與輸出電感之第一端之間，且其操作係受控於第二控制訊號。第四開關耦接於第一輸出電壓與輸出電感之第二端之間，且其操作係受控於第一控制訊號。第五開關耦接於輸出電感之第一端與接地端之間，且其操作係受控於第二控制訊號。According to an embodiment of the present invention, a voltage conversion circuit is provided. In this embodiment, the voltage conversion circuit includes an output inductor, receives an input voltage, and outputs a first output voltage and a second output voltage with opposite polarities, respectively. The voltage conversion circuit further includes a first error amplifier, a second error amplifier, an error summing module, a pulse width modulation generation module, a control module, a first switch, a second switch, a third switch, a first switch Four switches and fifth switches. The first error amplifier is used for respectively receiving the first feedback voltage and the first reference voltage and outputting a first error signal, wherein the first feedback voltage is related to the first output voltage. The second error amplifier is used for respectively receiving the second feedback voltage and the second reference voltage and outputting a second error signal, wherein the second feedback voltage is related to the second output voltage. The error summation module is respectively coupled to the first error amplifier and the second error amplifier for receiving the first error signal and the second error signal respectively, and generating the first error modulation according to the first error signal and the second error signal respectively signal and the second error modulation signal. The pulse width modulation generation module is coupled to the error summation module for receiving the first error modulation signal, the second error modulation signal and the sawtooth signal respectively, and according to the first error modulation signal and the second error modulation signal and the sawtooth signal to generate a first PWM signal and a second PWM signal respectively. The control module is coupled to the PWM generating module, and is used for respectively receiving the first PWM signal and the second PWM signal and generating the first control signal and the second control signal accordingly. The first switch is coupled between the input voltage and the first end of the output inductor, and its operation is controlled by the first control signal. The second switch is coupled between the second terminal of the output inductor and the ground terminal, and its operation is controlled by the second control signal. The third switch is coupled between the second output voltage and the first end of the output inductor, and its operation is controlled by the second control signal. The fourth switch is coupled between the first output voltage and the second end of the output inductor, and its operation is controlled by the first control signal. The fifth switch is coupled between the first terminal of the output inductor and the ground terminal, and its operation is controlled by the second control signal.
於一實施例中，第一誤差調變訊號係用來決定充電期間長度，以得到最大輸入電荷量。In one embodiment, the first error modulation signal is used to determine the length of the charging period so as to obtain the maximum input charge.
於一實施例中，第二誤差調變訊號係用來決定切換至另一輸出之切換時間，以維持電荷守恆。In one embodiment, the second error modulation signal is used to determine the switching time of switching to another output to maintain charge conservation.
於一實施例中，脈寬調變產生模組還接收零電流感測訊號並輸出零電流電壓訊號至控制模組，且零電流電壓訊號係用來決定輸出電感是否進入零電流狀態。In one embodiment, the PWM generation module further receives the zero current sensing signal and outputs the zero current voltage signal to the control module, and the zero current voltage signal is used to determine whether the output inductor enters the zero current state.
於一實施例中，電壓轉換電路還包括零電流感測模組，耦接至輸出電感之第二端與第四開關之間且耦接脈寬調變產生模組，用以感測輸出電感之第二端與第四開關之間的電流是否為零，以提供零電流感測訊號至脈寬調變產生模組，其中控制模組根據零電流電壓訊號調整第一控制訊號與第二控制訊號。In one embodiment, the voltage conversion circuit further includes a zero current sensing module, which is coupled between the second end of the output inductor and the fourth switch and is coupled to the pulse width modulation generating module for sensing the output inductor Whether the current between the second end and the fourth switch is zero, so as to provide a zero current sensing signal to the PWM generation module, wherein the control module adjusts the first control signal and the second control signal according to the zero current voltage signal signal.
於一實施例中，電壓轉換電路還包括第一分壓電阻及第二分壓電阻，串接於第一輸出電壓與接地端之間，第一誤差放大器之輸入端耦接至第一分壓電阻與第二分壓電阻之間，以接收第一回授電壓；以及第三分壓電阻及第四分壓電阻，串接於第二輸出電壓與預設電壓之間，第二誤差放大器之輸入端耦接至第三分壓電阻與第四分壓電阻之間，以接收第二回授電壓。In one embodiment, the voltage conversion circuit further includes a first voltage dividing resistor and a second voltage dividing resistor, which are connected in series between the first output voltage and the ground terminal, and the input terminal of the first error amplifier is coupled to the first voltage dividing terminal. between the resistor and the second voltage dividing resistor to receive the first feedback voltage; and the third voltage dividing resistor and the fourth voltage dividing resistor are connected in series between the second output voltage and the preset voltage, and the second error amplifier The input terminal is coupled between the third voltage dividing resistor and the fourth voltage dividing resistor to receive the second feedback voltage.
於一實施例中，電壓轉換電路還包括合成模組，耦接脈寬調變產生模組，用以分別接收電流感測訊號及斜波訊號並據以產生鋸齒訊號至脈寬調變產生模組。In one embodiment, the voltage conversion circuit further includes a synthesis module coupled to the PWM generation module for respectively receiving the current sensing signal and the ramp signal and generating the sawtooth signal to the PWM generation module accordingly. Group.
於一實施例中，電壓轉換電路還包括斜波產生模組，耦接合成模組，用以接收時脈訊號並根據時脈訊號產生斜波訊號至合成模組；以及電流感測模組，耦接至輸出電感之第二端與第二開關之間且耦接合成模組，用以感測輸出電感之第二端與第二開關之間的電流並據以產生電流感測訊號至合成模組。In one embodiment, the voltage conversion circuit further includes a ramp wave generating module coupled to the synthesis module for receiving the clock signal and generating the ramp wave signal to the synthesis module according to the clock signal; and a current sensing module, It is coupled between the second end of the output inductor and the second switch and is coupled to a synthesis module for sensing the current between the second end of the output inductor and the second switch and generates a current sensing signal to the synthesis module module.
於一實施例中，電壓轉換電路還包括第一輸出電容，其一端耦接至第四開關與第一輸出電壓之間且其另一端耦接接地端；第一輸出電流源，其一端耦接至第四開關與第一輸出電壓之間且其另一端耦接接地端；第一輸出電流源，其一端耦接至第四開關與第一輸出電壓之間且其另一端耦接接地端；第二輸出電容，其一端耦接至第三開關與第二輸出電壓之間且其另一端耦接接地端；以及第二輸出電流源，其一端耦接至第三開關與第二輸出電壓之間且其另一端耦接接地端。In one embodiment, the voltage conversion circuit further includes a first output capacitor, one end of which is coupled between the fourth switch and the first output voltage and the other end of which is coupled to the ground terminal; a first output current source, one end of which is coupled to the ground between the fourth switch and the first output voltage and the other end of which is coupled to the ground terminal; the first output current source, one end of which is coupled between the fourth switch and the first output voltage and the other end of which is coupled to the ground terminal; a second output capacitor, one end of which is coupled between the third switch and the second output voltage and the other end of which is coupled to the ground; and a second output current source, one end of which is coupled between the third switch and the second output voltage and the other end is coupled to the ground.
於一實施例中，誤差加總模組包括第一電壓-電流轉換單元，耦接第一誤差放大器，用以將第一誤差訊號轉換為第一電流訊號；第二電壓-電流轉換單元，耦接第二誤差放大器，用以將第二誤差訊號轉換為第二電流訊號；第一電阻單元，其第一端分別耦接第一電壓-電流轉換單元及第二電壓-電流轉換單元之輸出端且其第二端耦接至接地端，第一電流訊號與第二電流訊號合成為第一加總電流流經第一電阻單元，以產生第一誤差調變訊號。In one embodiment, the error summation module includes a first voltage-current conversion unit, coupled to the first error amplifier, for converting the first error signal into a first current signal; and a second voltage-current conversion unit, coupled to connected to a second error amplifier for converting the second error signal into a second current signal; the first resistance unit, the first end of which is respectively coupled to the output ends of the first voltage-current conversion unit and the second voltage-current conversion unit And the second end thereof is coupled to the ground end, the first current signal and the second current signal are combined into a first summed current and flow through the first resistor unit to generate a first error modulation signal.
於一實施例中，誤差加總模組還包括解碼單元(Decoder)，用以根據輸入電壓及第一輸出電壓/第二輸出電壓產生倍率常數；電流鏡單元(Current mirror)，分別耦接第一電壓-電流轉換單元、第二電壓-電流轉換單元及解碼單元，用以根據第一電流訊號、第二電流訊號及倍率常數產生第二加總電流；以及第二電阻單元，耦接於電流鏡單元與接地端之間，第二加總電流流經第二電阻單元，以產生第二誤差調變訊號。In one embodiment, the error summing module further includes a decoding unit (Decoder) for generating a magnification constant according to the input voltage and the first output voltage/second output voltage; and a current mirror unit (Current mirror), respectively coupled to the first output voltage. a voltage-current conversion unit, a second voltage-current conversion unit and a decoding unit for generating a second summed current according to the first current signal, the second current signal and the rate constant; and a second resistance unit coupled to the current Between the mirror unit and the ground terminal, the second summed current flows through the second resistor unit to generate a second error modulation signal.
於一實施例中，電壓轉換電路係為單電感雙極性輸出(Single-Inductor Bipolar Output, SIBO)直流-直流電壓轉換器(DC-DC converter)且其採用有序功率分配控制(Ordered Power Distributive Control, OPDC)的時序控制方式。In one embodiment, the voltage conversion circuit is a single-inductor bipolar output (SIBO) DC-DC converter and adopts an ordered power distribution control (Ordered Power Distributive Control) , OPDC) timing control method.
依據本發明之另一具體實施例為一種電壓轉換電路控制方法。於此實施例中，電壓轉換電路控制方法用以控制包括輸出電感的電壓轉換電路接收輸入電壓並分別輸出極性相反的第一輸出電壓及第二輸出電壓。電壓轉換電路控制方法包括下列步驟：(a)根據第一回授電壓及第一參考電壓提供第一誤差訊號，其中第一回授電壓與第一輸出電壓有關；(b)根據第二回授電壓及第二參考電壓提供第二誤差訊號，其中第二回授電壓與第二輸出電壓有關；(c)根據第一誤差訊號與第二誤差訊號分別提供第一誤差調變訊號及第二誤差調變訊號；(d)根據第一誤差調變訊號、第二誤差調變訊號及鋸齒訊號分別提供第一脈寬調變訊號及第二脈寬調變訊號；(e)根據第一脈寬調變訊號與第二脈寬調變訊號分別提供第一控制訊號及第二控制訊號；(f)透過第一控制訊號分別控制耦接於輸入電壓與輸出電感之第一端之間的第一開關以及耦接於第一輸出電壓與輸出電感之第二端之間的第四開關；以及(g)透過第二控制訊號分別控制耦接於輸出電感之第二端與接地端之間的第二開關、耦接於第二輸出電壓與輸出電感之第一端之間的第三開關以及耦接於輸出電感之第一端與接地端之間的第五開關。Another specific embodiment according to the present invention is a control method of a voltage conversion circuit. In this embodiment, the voltage conversion circuit control method is used to control the voltage conversion circuit including the output inductor to receive the input voltage and respectively output the first output voltage and the second output voltage with opposite polarities. The voltage conversion circuit control method includes the following steps: (a) providing a first error signal according to a first feedback voltage and a first reference voltage, wherein the first feedback voltage is related to the first output voltage; (b) according to the second feedback The voltage and the second reference voltage provide a second error signal, wherein the second feedback voltage is related to the second output voltage; (c) respectively provide a first error modulation signal and a second error signal according to the first error signal and the second error signal modulate the signal; (d) respectively provide a first pulse width modulation signal and a second pulse width modulation signal according to the first error modulation signal, the second error modulation signal and the sawtooth signal; (e) according to the first pulse width The modulation signal and the second pulse width modulation signal respectively provide the first control signal and the second control signal; (f) respectively control the first control signal coupled between the input voltage and the first end of the output inductor through the first control signal a switch and a fourth switch coupled between the first output voltage and the second terminal of the output inductor; and (g) respectively controlling the first switch coupled between the second terminal of the output inductor and the ground terminal through the second control signal Two switches, a third switch coupled between the second output voltage and the first terminal of the output inductor, and a fifth switch coupled between the first terminal of the output inductor and the ground terminal.
相較於先前技術，根據本發明之電壓轉換電路及其控制方法可透過誤差加總模組根據與第一/第二輸出電壓有關的第一/第二回授電壓來調整第一/第二脈寬調變訊號，有效降低採用有序功率分配控制(Ordered Power Distributive Control, OPDC)的時序控制方式的單電感多輸出(Single Inductor Multiple Output, SIMO)電壓轉換電路的交越變動效應(Cross regulation effect)，以提升其電壓轉換效能。Compared with the prior art, the voltage conversion circuit and the control method thereof according to the present invention can adjust the first/second voltage according to the first/second feedback voltage related to the first/second output voltage through the error summation module The PWM signal can effectively reduce the cross regulation effect (Single Inductor Multiple Output, SIMO) voltage conversion circuit that adopts the sequential control method of Ordered Power Distributive Control (OPDC). effect) to improve its voltage conversion performance.
關於本發明之優點與精神可以藉由以下的發明詳述及所附圖式得到進一步的瞭解。The advantages and spirit of the present invention can be further understood from the following detailed description of the invention and the accompanying drawings.
現在將詳細參考本發明的示範性實施例，並在附圖中說明所述示範性實施例的實例。在圖式及實施方式中所使用相同或類似標號的元件/構件是用來代表相同或類似部分。Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Elements/components using the same or similar numbers in the drawings and the embodiments are intended to represent the same or similar parts.
依據本發明之一具體實施例為一種電壓轉換電路。於此實施例中，電壓轉換電路可以是單電感多輸出(Single Inductor Multiple Output, SIMO)直流-直流電壓轉換器(DC-DC converter)，例如具有單一個輸出電感並可將輸入電壓轉換為極性相反的兩個輸出電壓的單電感雙極性輸出(Single-Inductor Bipolar Output, SIBO)直流-直流電壓轉換器且其採用有序功率分配控制(Ordered Power Distributive Control, OPDC)的時序控制方式，其可應用於顯示面板，例如主動矩陣有機發光二極體(Active-Matrix Organic Light-Emitting Diode, AMOLED)顯示面板，但不以此為限。According to an embodiment of the present invention, a voltage conversion circuit is provided. In this embodiment, the voltage conversion circuit may be a single inductor multiple output (Single Inductor Multiple Output, SIMO) DC-DC converter (DC-DC converter), for example, having a single output inductor and converting the input voltage to polarity The single-inductor bipolar output (Single-Inductor Bipolar Output, SIBO) DC-DC voltage converter with two opposite output voltages adopts the sequential control method of Ordered Power Distributive Control (OPDC), which can be Applied to display panels, such as Active-Matrix Organic Light-Emitting Diode (AMOLED) display panels, but not limited to this.
請參照圖1，圖1繪示此實施例中之電壓轉換電路1的示意圖。如圖1所示，電壓轉換電路1包括輸出電感L且接收輸入電壓VIN並分別輸出極性相反的第一輸出電壓VOP及第二輸出電壓VON。電壓轉換電路1還包括第一誤差放大器11、第二誤差放大器12、誤差加總(Error summing)模組13、零電流感測模組14、斜波產生模組15、電流感測模組16、合成模組17、脈寬調變產生模組18、控制模組19、第一開關M1、第二開關M2、第三開關M3、第四開關M4、第五開關M5、第一分壓電阻RP1、第二分壓電阻RP2、第三分壓電阻RN1、第四分壓電阻RN2、第一輸出電容COP、第一輸出電流源IOP、第一輸出電流源IOP、第二輸出電容CON及第二輸出電流源ION，但不以此為限。Please refer to FIG. 1 , which is a schematic diagram of the voltage conversion circuit 1 in this embodiment. As shown in FIG. 1 , the voltage conversion circuit 1 includes an output inductor L, receives an input voltage VIN, and outputs a first output voltage VOP and a second output voltage VON with opposite polarities, respectively. The voltage conversion circuit 1 further includes a
第一誤差放大器11分別接收第一回授電壓VFP及參考電壓VREF2並輸出第一誤差訊號VEP，其中第一回授電壓VFP與第一輸出電壓VOP有關。第二誤差放大器12用以分別接收第二回授電壓VFN及參考電壓VREF3並輸出第二誤差訊號VEN，其中第二回授電壓VFN與第二輸出電壓VON有關。The
誤差加總模組13分別耦接第一誤差放大器11及第二誤差放大器12，用以分別接收第一誤差訊號VEP及第二誤差訊號VEN，並根據第一誤差訊號VEP與第二誤差訊號VEN分別產生第一誤差調變訊號VESUM1及第二誤差調變訊號VESUM2。The
脈寬調變產生模組18耦接誤差加總模組13，用以分別接收第一誤差調變訊號VESUM1、第二誤差調變訊號VESUM2及鋸齒訊號VSAW並根據第一誤差調變訊號VESUM1、第二誤差調變訊號VESUM2及鋸齒訊號VSAW分別產生第一脈寬調變訊號VPWM1及第二脈寬調變訊號VPWM2。The pulse width
控制模組19耦接脈寬調變產生模組18，用以分別接收第一脈寬調變訊號VPWM1與第二脈寬調變訊號VPWM2並據以分別產生第一控制訊號VGP及第二控制訊號VGN。The
第一開關M1耦接於輸入電壓VIN與輸出電感L之第一端之間，且其操作係受控於第一控制訊號VGP。第二開關M2耦接於輸出電感L之第二端與接地端之間，且其操作係受控於第二控制訊號VGN。第三開關M3耦接於第二輸出電壓VON與輸出電感L之第一端之間，且其操作係受控於第二控制訊號VGN。第四開關M4耦接於第一輸出電壓VOP與輸出電感L之第二端之間，且其操作係受控於第一控制訊號VGP。第五開關M5耦接於輸出電感L之第一端與接地端之間，且其操作係受控於第二控制訊號VGN。The first switch M1 is coupled between the input voltage VIN and the first end of the output inductor L, and its operation is controlled by the first control signal VGP. The second switch M2 is coupled between the second terminal of the output inductor L and the ground terminal, and its operation is controlled by the second control signal VGN. The third switch M3 is coupled between the second output voltage VON and the first end of the output inductor L, and its operation is controlled by the second control signal VGN. The fourth switch M4 is coupled between the first output voltage VOP and the second end of the output inductor L, and its operation is controlled by the first control signal VGP. The fifth switch M5 is coupled between the first terminal of the output inductor L and the ground terminal, and its operation is controlled by the second control signal VGN.
零電流感測模組14耦接至輸出電感L之第二端與第四開關M4之間且耦接脈寬調變產生模組18，用以感測輸出電感L之第二端與第四開關M4之間的電流是否為零，以提供零電流感測訊號IZC至脈寬調變產生模組18。脈寬調變產生模組18接收零電流感測訊號IZC並輸出零電流電壓訊號VZC至控制模組19，其中零電流電壓訊號VZC係用來決定輸出電感L是否進入零電流狀態。控制模組19根據零電流電壓訊號VZC調整第一控制訊號VGP與第二控制訊號VGN。The zero
斜波產生模組15耦接合成模組17，用以接收時脈訊號VCLK並根據時脈訊號VCLK產生斜波訊號VSL至合成模組17。電流感測模組16耦接至輸出電感L之第二端與第二開關M2之間且耦接合成模組17，用以感測輸出電感L之第二端與第二開關M2之間的電流並據以產生電流感測訊號VCS至合成模組17。合成模組17耦接脈寬調變產生模組18，用以分別接收電流感測訊號VCS及斜波訊號VSL並據以產生鋸齒訊號VSAW至脈寬調變產生模組18。The ramp
第一分壓電阻RP1及第二分壓電阻RP2串接於第一輸出電壓VOP與接地端GND之間，第一誤差放大器11之輸入端-耦接至第一分壓電阻RP1與第二分壓電阻RP2之間，以接收第一回授電壓VFP。第三分壓電阻RN1及第四分壓電阻RN2串接於第二輸出電壓VON與預設電壓VREF1之間，第二誤差放大器12之輸入端+耦接至第三分壓電阻RN1與第四分壓電阻RN2之間，以接收第二回授電壓VFN。The first voltage dividing resistor RP1 and the second voltage dividing resistor RP2 are connected in series between the first output voltage VOP and the ground terminal GND, and the input terminal of the first error amplifier 11 - is coupled to the first voltage dividing resistor RP1 and the second voltage dividing resistor between the piezoresistor RP2 to receive the first feedback voltage VFP. The third voltage dividing resistor RN1 and the fourth voltage dividing resistor RN2 are connected in series between the second output voltage VON and the preset voltage VREF1, and the input terminal + of the
第一輸出電容COP的一端耦接至第四開關M4與第一輸出電壓VOP之間且其另一端耦接接地端GND。第一輸出電流源IOP的一端耦接至第四開關M4與第一輸出電壓VOP之間且其另一端耦接接地端GND。第一輸出電流源IOP的一端耦接至第四開關M4與第一輸出電壓VOP之間且其另一端耦接接地端GND。第二輸出電容CON的一端耦接至第三開關M3與第二輸出電壓VON之間且其另一端耦接接地端GND。第二輸出電流源ION的一端耦接至第三開關M3與第二輸出電壓VON之間且其另一端耦接接地端GND。One end of the first output capacitor COP is coupled between the fourth switch M4 and the first output voltage VOP and the other end thereof is coupled to the ground GND. One end of the first output current source IOP is coupled between the fourth switch M4 and the first output voltage VOP and the other end thereof is coupled to the ground GND. One end of the first output current source IOP is coupled between the fourth switch M4 and the first output voltage VOP and the other end thereof is coupled to the ground GND. One end of the second output capacitor CON is coupled between the third switch M3 and the second output voltage VON and the other end thereof is coupled to the ground GND. One end of the second output current source ION is coupled between the third switch M3 and the second output voltage VON and the other end is coupled to the ground GND.
需特別說明的是，誤差加總模組13所提供的第一誤差調變訊號VESUM1係用來決定充電期間長度，以得到最大輸入電荷量。誤差加總模組13所提供的第二誤差調變訊號VESUM2係用來決定切換至另一輸出之切換時間，以維持電荷守恆。It should be noted that the first error modulation signal VESUM1 provided by the
請參照圖2A。圖2A繪示誤差加總模組13之一實施例。如圖2A所示，誤差加總模組13包括第一電壓-電流轉換單元(V-I converter)130、第二電壓-電流轉換單元131、解碼單元(Decoder)132、電流鏡單元(Current mirror)133、第一電阻單元R及第二電阻單元R。第一電壓-電流轉換單元130耦接第一誤差放大器11，用以將第一誤差訊號VEP轉換為第一電流訊號IEP。第二電壓-電流轉換單元131耦接第二誤差放大器12，用以將第二誤差訊號VEN轉換為第二電流訊號IEN。第一電阻單元R的第一端分別耦接第一電壓-電流轉換單元130及第二電壓-電流轉換單元131之輸出端且其第二端耦接至接地端GND。第一電流訊號IEP與第二電流訊號IEN合成為第一加總電流ISUM1流經第一電阻單元R，以產生第一誤差調變訊號VESUM1。Please refer to FIG. 2A. FIG. 2A shows an embodiment of the
解碼單元132用以根據輸入電壓VIN及第一輸出電壓VOP/第二輸出電壓VON產生倍率常數K。電流鏡單元133分別耦接第一電壓-電流轉換單元130、第二電壓-電流轉換單元131及解碼單元132，用以根據第一電流訊號IEP、第二電流訊號IEN及倍率常數K產生第二加總電流ISUM2。第二電阻單元R耦接於電流鏡單元133與接地端GND之間。第二加總電流ISUM2流經第二電阻單元R，以產生第二誤差調變訊號VESUM2。The
請參照圖2B。圖2B繪示第一電壓-電流轉換單元130之一實施例。如圖2B所示，第一電壓-電流轉換單元130包括電壓隨耦器1301、開關1302、電流鏡1303及電阻R。開關1302與電阻R串接於電流鏡1303與接地端GND之間。電壓隨耦器1301的輸入端+接收第一誤差訊號VEP且其輸入端-耦接至開關1302與電阻R之間。電壓隨耦器1301的輸出端耦接至開關1302的閘極。電流鏡1303包括開關SW1~SW2。開關SW1與SW2的閘極彼此耦接。開關SW1耦接開關1302。開關SW2輸出第一電流訊號IEP。Please refer to FIG. 2B. FIG. 2B shows an embodiment of the first voltage-
請參照圖3。圖3繪示電壓轉換電路中之各訊號的時序圖。如圖3所示，週期T係由時間t3至t11，可分為四段期間D1T~D4T。Please refer to Figure 3. FIG. 3 is a timing diagram of each signal in the voltage conversion circuit. As shown in FIG. 3 , the period T is from time t3 to t11 and can be divided into four periods D1T to D4T.
於時間t3之前(亦即週期T之前)的期間，電感電流IL維持於零，電感電壓VL維持於零，鋸齒訊號VSAW從時間t1開始下降並於時間t3降至低電壓位準C，時脈訊號VCLK維持於高位準，第一脈寬調變訊號VPWM1於時間t2由高位準下降至低位準，第二脈寬調變訊號VPWM2於時間t1由高位準下降至低位準，零電流電壓訊號VZC維持於低位準。During the period before time t3 (that is, before the period T), the inductor current IL is maintained at zero, the inductor voltage VL is maintained at zero, the sawtooth signal VSAW starts to decrease from time t1 and falls to the low voltage level C at time t3, and the clock pulse The signal VCLK is maintained at a high level, the first PWM signal VPWM1 drops from a high level to a low level at time t2, the second PWM signal VPWM2 drops from a high level to a low level at time t1, and the zero-current voltage signal VZC maintain a low level.
於時間t3至t4的期間D1T，電感電流IL從零上升至電流峰值IPEAK，電感電壓VL於時間t3上升至輸入電壓VIN並維持於輸入電壓VIN至時間t4，鋸齒訊號VSAW於時間t3開始從低電壓位準C開始上升且其上升斜率高於原來的斜波訊號VSL的上升斜率，鋸齒訊號VSAW於時間t4上升至第一誤差調變訊號VESUM1，時脈訊號VCLK於時間t3從高位準下降至低位準並維持於低位準，第一脈寬調變訊號VPWM1與第二脈寬調變訊號VPWM2均維持於低位準，零電流電壓訊號VZC維持於低位準。During the period D1T from time t3 to t4, the inductor current IL rises from zero to the current peak value IPEAK, the inductor voltage VL rises to the input voltage VIN at time t3 and remains at the input voltage VIN until time t4, the sawtooth signal VSAW starts from low at time t3 The voltage level C starts to rise and its rising slope is higher than the rising slope of the original ramp signal VSL, the sawtooth signal VSAW rises to the first error modulation signal VESUM1 at time t4, and the clock signal VCLK drops from high level to The low level is maintained at a low level, the first pulse width modulation signal VPWM1 and the second pulse width modulation signal VPWM2 are maintained at a low level, and the zero-current voltage signal VZC is maintained at a low level.
於時間t4至t5的期間D2T，電感電流IL從電流峰值IPEAK下降至電流值IOPDC，電感電壓VL於時間t4從輸入電壓VIN下降至第二輸出電壓VON並維持於第二輸出電壓VON至時間t5，鋸齒訊號VSAW於時間t4的第一誤差調變訊號VESUM1持續上升而於時間t5上升至第二誤差調變訊號VESUM2，時脈訊號VCLK維持於低位準，第一脈寬調變訊號VPWM1於時間t4由低位準上升至高位準並維持於高位準，第二脈寬調變訊號VPWM2維持於低位準，零電流電壓訊號VZC維持於低位準。During the period D2T from time t4 to t5, the inductor current IL decreases from the current peak value IPEAK to the current value IOPDC, and the inductor voltage VL decreases from the input voltage VIN to the second output voltage VON at time t4 and remains at the second output voltage VON until time t5 , the first error modulation signal VESUM1 of the sawtooth signal VSAW continues to rise at time t4 and rises to the second error modulation signal VESUM2 at time t5, the clock signal VCLK remains at a low level, and the first pulse width modulation signal VPWM1 is at time t5. t4 rises from a low level to a high level and is maintained at a high level, the second pulse width modulation signal VPWM2 is maintained at a low level, and the zero-current voltage signal VZC is maintained at a low level.
於時間t5至t7的期間D3T，電感電流IL從電流值IOPDC下降至零，電感電壓VL於時間t5從第二輸出電壓VON下降至負的第一輸出電壓-VOP並維持於負的第一輸出電壓-VOP至時間t7，鋸齒訊號VSAW於時間t5會先稍微下降後再以原來的斜波訊號VSL的斜率上升至第一誤差訊號VEP，時脈訊號VCLK維持於低位準，第一脈寬調變訊號VPWM1維持於高位準，第二脈寬調變訊號VPWM2於時間t5先短暫地由低位準上升至高位準再降回低位準並於時間t6從低位準上升至高位準並維持於高位準至時間t7，零電流電壓訊號VZC維持於低位準。During the period D3T from time t5 to t7, the inductor current IL drops from the current value IOPDC to zero, and the inductor voltage VL drops from the second output voltage VON to the negative first output voltage -VOP at time t5 and remains at the negative first output From the voltage -VOP to time t7, the sawtooth signal VSAW will drop slightly at time t5 and then rise to the first error signal VEP at the slope of the original ramp signal VSL, the clock signal VCLK is maintained at a low level, and the first pulse width modulation The variable signal VPWM1 remains at a high level, and the second PWM signal VPWM2 briefly rises from a low level to a high level at time t5 and then falls back to a low level, and rises from a low level to a high level at time t6 and remains at a high level Until time t7, the zero-current voltage signal VZC is maintained at a low level.
於時間t7至t11的期間D4T，電感電流IL維持於零，電感電壓VL維持於零，鋸齒訊號VSAW於時間t7至t8先持續上升並於時間t8開始下降直至時間t11降至低電壓位準C，時脈訊號VCLK於時間t7至t8維持於低位準並於時間t8上升至高位準並維持於高位準直至時間t11，第一脈寬調變訊號VPWM1於時間t7至t10維持於高位準並於時間t10下降至低位準並維持於低位準直至時間t11，第二脈寬調變訊號VPWM2於時間t7至t9維持於高位準並於時間t9下降至低位準並維持於低位準直至時間t11，零電流電壓訊號VZC於時間t7先短暫地由低位準上升至高位準再降回低位準並維持於低位準直至時間t11。During the period D4T from time t7 to t11, the inductor current IL is maintained at zero, the inductor voltage VL is maintained at zero, the sawtooth signal VSAW continues to rise from time t7 to t8 and starts to decrease at time t8 until time t11 falls to the low voltage level C , the clock signal VCLK is maintained at a low level from time t7 to t8 and rises to a high level at time t8 and remains at a high level until time t11, the first PWM signal VPWM1 is maintained at a high level from time t7 to t10 and is at a high level at time t11. The time t10 drops to a low level and remains at a low level until time t11, the second PWM signal VPWM2 maintains a high level from time t7 to t9 and drops to a low level at time t9 and remains at a low level until time t11, zero The current and voltage signal VZC briefly rises from a low level to a high level at time t7 and then falls back to a low level and remains at a low level until time t11 .
需說明的是，鋸齒訊號VSAW從時間t3開始上升並於時間t4達到誤差加總模組13所提供的第一誤差調變訊號VESUM1(亦即對輸出電感L充電的上限)，此時即可決定充電期間長度為時間t3至t4，以得到最大輸入電荷量。接著，鋸齒訊號VSAW從時間t4繼續上升並於時間t5達到誤差加總模組13所提供的第二誤差調變訊號VESUM2(亦即對輸出電感L放電時之電荷守恆點)，此時即可決定從一輸出(例如第二輸出電壓VON)切換至另一輸出(負的第一輸出電壓-VOP)之切換時間為時間t5，藉以維持電荷守恆。It should be noted that the sawtooth signal VSAW starts to rise from time t3 and reaches the first error modulation signal VESUM1 provided by the
依據本發明之另一具體實施例為一種電壓轉換電路控制方法。於此實施例中，電壓轉換電路控制方法用以控制包括輸出電感的電壓轉換電路接收輸入電壓並分別輸出極性相反的第一輸出電壓及第二輸出電壓。電壓轉換電路可以是單電感多輸出(Single Inductor Multiple Output, SIMO)直流-直流電壓轉換器(DC-DC converter)，例如單電感雙極性輸出(Single-Inductor Bipolar Output, SIBO)直流-直流電壓轉換器且其採用有序功率分配控制(Ordered Power Distributive Control, OPDC)的時序控制方式，其可應用於顯示面板，例如主動矩陣有機發光二極體(Active-Matrix Organic Light-Emitting Diode, AMOLED)顯示面板，但不以此為限。Another specific embodiment according to the present invention is a control method of a voltage conversion circuit. In this embodiment, the voltage conversion circuit control method is used to control the voltage conversion circuit including the output inductor to receive the input voltage and respectively output the first output voltage and the second output voltage with opposite polarities. The voltage conversion circuit may be a single-inductor multiple-output (Single Inductor Multiple Output, SIMO) DC-DC converter (DC-DC converter), such as a single-inductor bipolar output (Single-Inductor Bipolar Output, SIBO) DC-DC voltage converter The device adopts the sequential control method of Ordered Power Distributive Control (OPDC), which can be applied to display panels, such as Active-Matrix Organic Light-Emitting Diode (AMOLED) display panel, but not limited to this.
請參照圖4，圖4繪示此實施例中之電壓轉換電路控制方法的流程圖。如圖4所示，電壓轉換電路控制方法包括下列步驟：Please refer to FIG. 4 . FIG. 4 is a flowchart illustrating a control method of the voltage conversion circuit in this embodiment. As shown in Figure 4, the control method of the voltage conversion circuit includes the following steps:
步驟S10：根據第一回授電壓及第一參考電壓提供第一誤差訊號並根據第二回授電壓及第二參考電壓提供第二誤差訊號，其中第一回授電壓與第一輸出電壓有關且第二回授電壓與第二輸出電壓有關；Step S10: Provide a first error signal according to the first feedback voltage and the first reference voltage and provide a second error signal according to the second feedback voltage and the second reference voltage, wherein the first feedback voltage is related to the first output voltage and The second feedback voltage is related to the second output voltage;
步驟S12：根據第一誤差訊號與第二誤差訊號分別提供第一誤差調變訊號及第二誤差調變訊號；Step S12: respectively providing a first error modulation signal and a second error modulation signal according to the first error signal and the second error signal;
步驟S14：以第一誤差調變訊號為上限對輸出電感充電；以及Step S14 : charging the output inductor with the first error modulation signal as the upper limit; and
步驟S16：以第二誤差調變訊號為第一輸出電壓與第二輸出電壓的電荷守恆點對輸出電感放電。Step S16: Discharge the output inductor by using the second error modulation signal as the charge conservation point of the first output voltage and the second output voltage.
於實際應用中，電壓轉換電路控制方法還可包括：根據第一誤差調變訊號、第二誤差調變訊號及鋸齒訊號分別提供第一脈寬調變訊號及第二脈寬調變訊號；根據第一脈寬調變訊號與第二脈寬調變訊號分別提供第一控制訊號及第二控制訊號；透過第一控制訊號分別控制耦接於輸入電壓與輸出電感之第一端之間的第一開關以及耦接於第一輸出電壓與輸出電感之第二端之間的第四開關；透過第二控制訊號分別控制耦接於輸出電感之第二端與接地端之間的第二開關、耦接於第二輸出電壓與輸出電感之第一端之間的第三開關以及耦接於輸出電感之第一端與接地端之間的第五開關。In practical applications, the voltage conversion circuit control method may further include: providing the first pulse width modulation signal and the second pulse width modulation signal according to the first error modulation signal, the second error modulation signal and the sawtooth signal, respectively; The first pulse width modulation signal and the second pulse width modulation signal respectively provide the first control signal and the second control signal; the first control signal is respectively used to control the first control signal coupled between the input voltage and the first end of the output inductor. a switch and a fourth switch coupled between the first output voltage and the second terminal of the output inductor; the second switch coupled between the second terminal of the output inductor and the ground terminal are respectively controlled by the second control signal, The third switch is coupled between the second output voltage and the first terminal of the output inductor, and the fifth switch is coupled between the first terminal of the output inductor and the ground terminal.
接著，請參照圖5。圖5繪示圖4中之步驟S12包括步驟S120~S126的流程圖。如圖5所示，步驟S12包括：Next, please refer to FIG. 5 . FIG. 5 is a flowchart showing that step S12 in FIG. 4 includes steps S120 - S126 . As shown in Figure 5, step S12 includes:
步驟S120：分別將第一誤差訊號及第二誤差訊號轉換為第一電流訊號及第二電流訊號；Step S120 : respectively converting the first error signal and the second error signal into a first current signal and a second current signal;
步驟S122：根據第一電流訊號與第二電流訊號產生第一加總電流流經第一電阻單元，以產生第一誤差調變訊號；Step S122: generating a first summed current to flow through the first resistor unit according to the first current signal and the second current signal to generate a first error modulation signal;
步驟S124：根據輸入電壓及第一輸出電壓/第二輸出電壓產生倍率常數；以及Step S124 : generating a rate constant according to the input voltage and the first output voltage/second output voltage; and
步驟S126：根據第一電流訊號、第二電流訊號及倍率常數產生第二加總電流流經第二電阻單元，以產生第二誤差調變訊號。Step S126: Generate a second summed current to flow through the second resistor unit according to the first current signal, the second current signal and the rate constant to generate a second error modulation signal.
相較於先前技術，根據本發明之電壓轉換電路及其控制方法可透過誤差加總模組根據與第一/第二輸出電壓有關的第一/第二回授電壓來調整第一/第二脈寬調變訊號，有效降低採用有序功率分配控制(Ordered Power Distributive Control, OPDC)的時序控制方式的單電感多輸出(Single Inductor Multiple Output, SIMO)電壓轉換電路的交越變動效應(Cross regulation effect)，以提升其電壓轉換效能。Compared with the prior art, the voltage conversion circuit and the control method thereof according to the present invention can adjust the first/second voltage according to the first/second feedback voltage related to the first/second output voltage through the error summation module The PWM signal can effectively reduce the cross regulation effect (Single Inductor Multiple Output, SIMO) voltage conversion circuit that adopts the sequential control method of Ordered Power Distributive Control (OPDC). effect) to improve its voltage conversion performance.
S10~S16:步驟 S120~S126:步驟 1:電壓轉換電路 L:輸出電感 IL:電感電流 VL:電感電壓 VIN:輸入電壓 VOP:第一輸出電壓 VON:第二輸出電壓 11:第一誤差放大器 12:第二誤差放大器 13:誤差加總模組 14:零電流感測模組 15:斜波產生模組 16:電流感測模組 17:合成模組 18:脈寬調變產生模組 19:控制模組 130:第一電壓-電流轉換單元 131:第二電壓-電流轉換單元 132:解碼單元 133:電流鏡單元 1301:電壓隨耦器 1302:開關 1303:電流鏡 M1:第一開關 M2:第二開關 M3:第三開關 M4:第四開關 M5:第五開關 RP1:第一分壓電阻 RP2:第二分壓電阻 RN1:第三分壓電阻 RN2:第四分壓電阻 COP:第一輸出電容 IOP:第一輸出電流源 CON:第二輸出電容 ION:第二輸出電流源 VCLK:時脈訊號 VREF1:參考電壓 VREF2:參考電壓 VREF3:參考電壓 VFP:第一回授電壓 VFN:第二回授電壓 VEP:第一誤差訊號 VEN:第二誤差訊號 VESUM1:第一誤差調變訊號 VESUM2:第二誤差調變訊號 VSAW:鋸齒訊號 IZC:零電流感測訊號 VZC:零電流電壓訊號 VPWM1:第一脈寬調變訊號 VPWM2:第二脈寬調變訊號 VGP:第一控制訊號 VGN:第二控制訊號 VSL:斜波訊號 VCS:電流感測訊號 R:電阻 GND:接地端 IEP:第一電流訊號 IEN:第二電流訊號 ISUM1:第一加總電流 ISUM2:第二加總電流 K:倍率常數 SW1~SW2:開關 t1~t11:時間 T:週期 IPEAK:電流峰值 IOPDC:電流值 D1T~D4T:期間 C:低電壓位準S10~S16: Steps S120~S126: Steps 1: Voltage conversion circuit L: output inductance IL: inductor current VL: inductor voltage VIN: input voltage VOP: first output voltage VON: The second output voltage 11: First Error Amplifier 12: Second Error Amplifier 13: Error summation module 14: Zero current sensing module 15: Ramp wave generation module 16: Current sensing module 17: Synthesis module 18: PWM generation module 19: Control Module 130: the first voltage-current conversion unit 131: The second voltage-current conversion unit 132: decoding unit 133: Current mirror unit 1301: Voltage follower 1302: Switch 1303: Current Mirror M1: first switch M2: Second switch M3: The third switch M4: Fourth switch M5: Fifth switch RP1: The first voltage divider resistor RP2: Second divider resistor RN1: The third voltage divider resistor RN2: Fourth divider resistor COP: first output capacitor IOP: first output current source CON: Second output capacitor ION: Second output current source VCLK: clock signal VREF1: Reference voltage VREF2: Reference voltage VREF3: Reference voltage VFP: The first feedback voltage VFN: The second feedback voltage VEP: first error signal VEN: Second error signal VESUM1: The first error modulation signal VESUM2: The second error modulation signal VSAW: Sawtooth signal IZC: Zero current sensing signal VZC: zero current voltage signal VPWM1: The first pulse width modulation signal VPWM2: The second pulse width modulation signal VGP: the first control signal VGN: the second control signal VSL: ramp signal VCS: current sense signal R: resistance GND: ground terminal IEP: The first current signal IEN: Second current signal ISUM1: The first summed current ISUM2: The second summed current K: rate constant SW1~SW2: switch t1~t11: time T: period IPEAK: current peak IOPDC: current value D1T~D4T: Period C: low voltage level
本發明所附圖式說明如下： 圖1繪示根據本發明之一較佳具體實施例中之電壓轉換電路的示意圖。 圖2A繪示誤差加總模組之一實施例。 圖2B繪示第一電壓-電流轉換單元之一實施例。 圖3繪示電壓轉換電路中之各訊號的時序圖。 圖4繪示根據本發明之另一較佳具體實施例中之電壓轉換電路控制方法的流程圖。 圖5繪示圖4中之步驟S12包括步驟S120~S126的流程圖。The accompanying drawings of the present invention are described as follows: FIG. 1 is a schematic diagram of a voltage conversion circuit according to a preferred embodiment of the present invention. FIG. 2A shows an embodiment of an error summation module. FIG. 2B illustrates an embodiment of the first voltage-current conversion unit. FIG. 3 is a timing diagram of each signal in the voltage conversion circuit. FIG. 4 is a flowchart illustrating a control method of a voltage conversion circuit according to another preferred embodiment of the present invention. FIG. 5 is a flowchart showing that step S12 in FIG. 4 includes steps S120 - S126 .
S10~S16:步驟 S10~S16: Steps
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201136120A (en) * | 2010-04-09 | 2011-10-16 | Alpha & Omega Semiconductor Cayman Ltd | Power supply conversion system for reducing cross regulation effect and power supply control method |
| TW201228207A (en) * | 2010-12-30 | 2012-07-01 | Realtek Semiconductor Corp | SIDO power converter and driving method thereof |
| US8823352B2 (en) * | 2011-07-11 | 2014-09-02 | Linear Technology Corporation | Switching power supply having separate AC and DC current sensing paths |
| TW201931346A (en) * | 2018-01-12 | 2019-08-01 | 博發電子股份有限公司 | SIBO buck-boost converter and control method thereof |
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| US9093899B2 (en) * | 2013-09-30 | 2015-07-28 | Micrel, Inc. | Timer based PFM exit control method for a boost regulator |
| US9231472B2 (en) * | 2014-04-11 | 2016-01-05 | Infineon Technologies Austria Ag | System and method for a switched-mode power supply |
-
2020
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201136120A (en) * | 2010-04-09 | 2011-10-16 | Alpha & Omega Semiconductor Cayman Ltd | Power supply conversion system for reducing cross regulation effect and power supply control method |
| TW201228207A (en) * | 2010-12-30 | 2012-07-01 | Realtek Semiconductor Corp | SIDO power converter and driving method thereof |
| US8823352B2 (en) * | 2011-07-11 | 2014-09-02 | Linear Technology Corporation | Switching power supply having separate AC and DC current sensing paths |
| TW201931346A (en) * | 2018-01-12 | 2019-08-01 | 博發電子股份有限公司 | SIBO buck-boost converter and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TW202118211A (en) | 2021-05-01 |
| CN112751481A (en) | 2021-05-04 |
| CN112751481B (en) | 2024-01-26 |
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