TWI812530B - Single inductor bipolar outputs (sibo) power converter - Google Patents

Single inductor bipolar outputs (sibo) power converter Download PDF

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TWI812530B
TWI812530B TW111141671A TW111141671A TWI812530B TW I812530 B TWI812530 B TW I812530B TW 111141671 A TW111141671 A TW 111141671A TW 111141671 A TW111141671 A TW 111141671A TW I812530 B TWI812530 B TW I812530B
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switch
sibo
power converter
phase
output voltage
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TW111141671A
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Chinese (zh)
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TW202347942A (en
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林信翔
曾培凱
嚴祥銘
許順維
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瑞鼎科技股份有限公司
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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
    • H02M3/158—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 including plural semiconductor devices as final control devices for a single load
    • 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
    • H02M1/0048—Circuits or arrangements for reducing losses
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

A single inductor bipolar outputs (SIBO) power converter includes an inductor and a first switch to a fifth switch. The inductor has a first terminal and a second terminal and an inductor current flows through the inductor. The first switch is coupled between an input voltage and the first terminal. The second switch is coupled between the first terminal and a second output voltage. The third switch is coupled between the second terminal and a first output voltage. The fourth switch is coupled between the second terminal and a ground terminal. The fifth switch is coupled between the first terminal and ground terminal. When SIBO power converter operates in a specific phase, the second switch and third switch are turned-on and the first switch, fourth switch and fifth switch are turned-off, so the first output voltage and second output voltage discharge simultaneously to reduce a peak value of inductor current.

Description

單電感雙極性輸出電源轉換器Single Inductor Bipolar Output Power Converter

本發明係與電源轉換器有關，特別是關於一種單電感雙極性輸出(SIBO)電源轉換器。 This invention relates to power converters, and more particularly to a single inductor bipolar output (SIBO) power converter.

一般而言，單電感雙極性輸出(SIBO)電源轉換器的系統導通功耗是將全部開關的方均根電流的平方(IRMS 2)乘以導通電阻(Ron)後加總而得。由於傳統的SIBO電源轉換器操作時難以降低其電感電流的峰值，因而造成傳統的單電感雙極性輸出電源轉換器的系統導通功耗無法降低，最終導致傳統的單電感雙極性輸出電源轉換器的重載效率不佳，有待進一步加以改善。 Generally speaking, the system on-state power dissipation of a single-inductor bipolar output (SIBO) power converter is the sum of the root-mean-square currents squared (I RMS 2 ) of all switches multiplied by the on-resistance (Ron). Since it is difficult to reduce the peak value of the inductor current of the traditional SIBO power converter during operation, the system conduction power consumption of the traditional single inductor bipolar output power converter cannot be reduced, which ultimately leads to the failure of the traditional single inductor bipolar output power converter. The reloading efficiency is poor and needs to be further improved.

因此，本發明提出一種單電感雙極性輸出電源轉換器，藉以有效解決先前技術所遭遇到之上述問題。 Therefore, the present invention proposes a single-inductor bipolar output power converter to effectively solve the above-mentioned problems encountered in the prior art.

根據本發明之一較佳具體實施例為一種單電感雙極性輸出電源轉換器。於此實施例中，SIBO電源轉換器包括電感、第一開關、第二開關、第三開關、第四開關及第五開關。電感具有第一端及第二端且電感電流流經電感。第一開關耦接於輸入電壓與第一端之間。第二開關耦接於第一端與第二輸出電壓之間。第三開關耦接於第二端與第一輸出電壓。第四開關耦接於第二端與接地端之間。第五開關耦 接於第一端與接地端之間。其中，當SIBO電源轉換器操作於特定相位下時，第二開關與第三開關導通且第一開關、第四開關及第五開關不導通，致使第一輸出電壓與第二輸出電壓同時放電而降低電感電流的峰值。 A preferred embodiment according to the present invention is a single-inductor bipolar output power converter. In this embodiment, the SIBO power converter includes an inductor, a first switch, a second switch, a third switch, a fourth switch and a fifth switch. The inductor has a first end and a second end and an inductor current flows through the inductor. The first switch is coupled between the input voltage and the first terminal. The second switch is coupled between the first terminal and the second output voltage. The third switch is coupled between the second terminal and the first output voltage. The fourth switch is coupled between the second terminal and the ground terminal. Fifth switch coupling Connected between the first terminal and the ground terminal. When the SIBO power converter operates in a specific phase, the second switch and the third switch are turned on and the first switch, the fourth switch and the fifth switch are not turned on, causing the first output voltage and the second output voltage to discharge at the same time. Reduce the peak value of the inductor current.

於一實施例中，SIBO電源轉換器還包括彼此串接的第一電容及第二電容。第一電容耦接於第一輸出電壓與接地端之間且第二電容耦接於接地端與第二輸出電壓之間。 In one embodiment, the SIBO power converter further includes a first capacitor and a second capacitor connected in series with each other. The first capacitor is coupled between the first output voltage and the ground terminal and the second capacitor is coupled between the ground terminal and the second output voltage.

於一實施例中，當SIBO電源轉換器操作於第一相位下時，第一開關及第四開關導通且第二開關、第三開關及第五開關不導通，以進行對電感充電。 In one embodiment, when the SIBO power converter operates in the first phase, the first switch and the fourth switch are turned on and the second switch, the third switch and the fifth switch are turned off to charge the inductor.

於一實施例中，當SIBO電源轉換器操作於第二相位下時，第二開關及第四開關導通且第一開關、第三開關及第五開關不導通，致使第二輸出電壓放電。 In one embodiment, when the SIBO power converter operates in the second phase, the second switch and the fourth switch are turned on and the first switch, the third switch and the fifth switch are not turned on, causing the second output voltage to be discharged.

於一實施例中，SIBO電源轉換器依序操作於特定相位及第二相位。 In one embodiment, the SIBO power converter operates in the specific phase and the second phase sequentially.

於一實施例中，當SIBO電源轉換器操作於第三相位下時，第三開關及第五開關導通且第一開關、第二開關及第四開關不導通。 In one embodiment, when the SIBO power converter operates in the third phase, the third switch and the fifth switch are turned on and the first switch, the second switch and the fourth switch are not turned on.

於一實施例中，SIBO電源轉換器依序操作於特定相位及第三相位。 In one embodiment, the SIBO power converter operates in the specific phase and the third phase sequentially.

於一實施例中，當SIBO電源轉換器操作於第四相位下時，第一開關及第三開關導通且第二開關、第四開關及第五開關不導通，致使第一輸出電壓放電。 In one embodiment, when the SIBO power converter operates in the fourth phase, the first switch and the third switch are turned on and the second switch, the fourth switch and the fifth switch are not turned on, causing the first output voltage to be discharged.

於一實施例中，SIBO電源轉換器係依序操作於第四相位及特定相位。 In one embodiment, the SIBO power converter operates in the fourth phase and the specific phase sequentially.

於一實施例中，當SIBO電源轉換器操作於第五相位下時，第四開關導通且第一開關、第二開關、第三開關及第五開關不導通。 In one embodiment, when the SIBO power converter operates in the fifth phase, the fourth switch is turned on and the first switch, the second switch, the third switch and the fifth switch are not turned on.

於一實施例中，當SIBO電源轉換器操作於第六相位下時，第五開關導通且第一開關、第二開關、第三開關及第四開關不導通。 In one embodiment, when the SIBO power converter operates in the sixth phase, the fifth switch is turned on and the first switch, the second switch, the third switch and the fourth switch are not turned on.

根據本發明之另一較佳具體實施例亦為一種單電感雙極性輸出電源轉換器。於此實施例中，SIBO電源轉換器包括電感、第一開關、第二開關、第三開關、充電泵及第五開關。電感具有第一端及第二端且電感電流流經電感。第一開關耦接於輸入電壓與第一端之間。第二開關耦接於第一端與第二輸出電壓之間。第三開關耦接於第二端與第一輸出電壓之間。充電泵包括飛跨電容、第四開關、第六開關、第七開關及第八開關。第四開關與第七開關串接於第二端與接地端之間且第六開關與第八開關串接於輸入電壓與接地端之間。飛跨電容之一端耦接至第六開關與第八開關之間且飛跨電容之另一端耦接至第四開關與第七開關之間。第五開關耦接於第一端與接地端之間。其中，當SIBO電源轉換器操作於特定相位下時，第二開關、第四開關與 第八開關導通且第一開關、第三開關、第五開關、第六開關及第七開關不導通，致使第二輸出電壓因電感與飛跨電容同時放電而降低電感電流的峰值。 Another preferred embodiment according to the present invention is also a single-inductor bipolar output power converter. In this embodiment, the SIBO power converter includes an inductor, a first switch, a second switch, a third switch, a charge pump and a fifth switch. The inductor has a first end and a second end and an inductor current flows through the inductor. The first switch is coupled between the input voltage and the first terminal. The second switch is coupled between the first terminal and the second output voltage. The third switch is coupled between the second terminal and the first output voltage. The charge pump includes a flying capacitor, a fourth switch, a sixth switch, a seventh switch and an eighth switch. The fourth switch and the seventh switch are connected in series between the second terminal and the ground terminal, and the sixth switch and the eighth switch are connected in series between the input voltage and the ground terminal. One end of the flying capacitor is coupled between the sixth switch and the eighth switch, and the other end of the flying capacitor is coupled between the fourth switch and the seventh switch. The fifth switch is coupled between the first terminal and the ground terminal. Among them, when the SIBO power converter operates in a specific phase, the second switch, the fourth switch and The eighth switch is turned on and the first switch, the third switch, the fifth switch, the sixth switch and the seventh switch are not turned on, causing the second output voltage to reduce the peak value of the inductor current due to simultaneous discharge of the inductor and the flying capacitor.

於一實施例中，SIBO電源轉換器還包括彼此串接的第一電容及第二電容。第一電容耦接於第一輸出電壓與接地端之間且第二電容耦接於接地端與第二輸出電壓之間。 In one embodiment, the SIBO power converter further includes a first capacitor and a second capacitor connected in series with each other. The first capacitor is coupled between the first output voltage and the ground terminal and the second capacitor is coupled between the ground terminal and the second output voltage.

於一實施例中，當SIBO電源轉換器操作於第一相位下時，第一開關、第四開關、第六開關及第七開關導通且第二開關、第三開關、第五開關及第八開關不導通，使得電感與飛跨電容儲能。 In one embodiment, when the SIBO power converter operates in the first phase, the first switch, the fourth switch, the sixth switch and the seventh switch are turned on and the second switch, the third switch, the fifth switch and the eighth switch are turned on. The switch is non-conductive, allowing the inductor and flying capacitor to store energy.

於一實施例中，SIBO電源轉換器係依序操作於第一相位及特定相位。 In one embodiment, the SIBO power converter operates in the first phase and the specific phase sequentially.

於一實施例中，當SIBO電源轉換器操作於第二相位下時，第二開關、第四開關、第六開關及第七開關導通且第一開關、第三開關、第五開關及第八開關不導通，致使第二輸出電壓放電且飛跨電容儲能。 In one embodiment, when the SIBO power converter operates in the second phase, the second switch, the fourth switch, the sixth switch and the seventh switch are turned on and the first switch, the third switch, the fifth switch and the eighth switch are turned on. The switch does not conduct, causing the second output voltage to discharge and the flying capacitor to store energy.

於一實施例中，當SIBO電源轉換器操作於第三相位下時，第三開關、第五開關、第六開關及第七開關導通且第一開關、第二開關、第四開關及第八開關不導通，致使電感對第一輸出電壓充電且飛跨電容儲能。 In one embodiment, when the SIBO power converter operates in the third phase, the third switch, the fifth switch, the sixth switch and the seventh switch are turned on and the first switch, the second switch, the fourth switch and the eighth switch are turned on. The switch is non-conductive, causing the inductor to charge the first output voltage and store energy across the flying capacitor.

於一實施例中，當SIBO電源轉換器操作於第四相位下時，第一開關、第三開關、第六開關及第七開關導通且第二開關、第 四開關、第五開關及第八開關不導通，致使電感對第一輸出電壓充電且飛跨電容儲能。 In one embodiment, when the SIBO power converter operates in the fourth phase, the first switch, the third switch, the sixth switch and the seventh switch are turned on and the second switch, the third switch and the seventh switch are turned on. The fourth switch, the fifth switch and the eighth switch are not conductive, causing the inductor to charge the first output voltage and store energy across the flying capacitor.

於一實施例中，SIBO電源轉換器係依序操作於第四相位及特定相位。 In one embodiment, the SIBO power converter operates in the fourth phase and the specific phase sequentially.

於一實施例中，當SIBO電源轉換器操作於第五相位下時，第二開關、第三開關、第六開關及第七開關導通且第一開關、第四開關、第五開關及第八開關不導通，致使第一輸出電壓及第二輸出電壓充/放電且飛跨電容儲能。 In one embodiment, when the SIBO power converter operates in the fifth phase, the second switch, the third switch, the sixth switch and the seventh switch are turned on and the first switch, the fourth switch, the fifth switch and the eighth switch are turned on. The switch is not conductive, causing the first output voltage and the second output voltage to charge/discharge and the flying capacitor stores energy.

相較於先前技術，本發明所揭露的SIBO電源轉換器係透過在特定相位下第一輸出電壓與第二輸出電壓同時放電或第二輸出電壓與飛跨電容同時放電來使電感電流的峰值下降，連帶使得系統導通功耗變小，藉以有效提升SIBO電源轉換器的重載效率。 Compared with the prior art, the SIBO power converter disclosed in the present invention reduces the peak value of the inductor current by simultaneously discharging the first output voltage and the second output voltage or the second output voltage and the flying capacitor at a specific phase. , which also makes the system conduction power consumption smaller, thereby effectively improving the heavy-load efficiency of the SIBO power converter.

1:SIBO電源轉換器 1:SIBO power converter

L:電感 L: inductance

IL:電感電流 IL: inductor current

S1~S5:第一開關~第五開關 S1~S5: first switch~fifth switch

COP:第一電容 COP: first capacitor

CON:第二電容 CON: second capacitor

VOP:第一輸出電壓 VOP: first output voltage

VON:第二輸出電壓 VON: second output voltage

LXN:第一端 LXN: first end

LXP:第二端 LXP: Second end

GND:接地端 GND: ground terminal

Ph A:第一相位 Ph A: first phase

Ph B:第二相位 Ph B: Second phase

Ph C:第三相位 Ph C: third phase

Ph D:第四相位 Ph D:Fourth Phase

Ph E:特定相位 Ph E: specific phase

Ph ZC:第五相位 Ph ZC: fifth phase

Ph ZC2:第六相位 Ph ZC2: Sixth Phase

VESUM:電流值 VESUM: current value

VEP:電流峰值 VEP: current peak value

5:SIBO電源轉換器 5:SIBO power converter

S6~S8:第六開關~第八開關 S6~S8: The sixth switch~the eighth switch

CP:充電泵 CP: charge pump

Cfly:飛跨電容 Cfly: flying capacitor

Ph Bc:特定相位 Ph Bc: specific phase

T1~T5:第一導通時間~第五導通時間 T1~T5: first conduction time~fifth conduction time

T1’~T4’:第一導通時間~第四導通時間 T1’~T4’: first conduction time~fourth conduction time

VESUM1:電流值 VESUM1: current value

VESUM2:電流值 VESUM2: current value

B1:面積 B1:Area

B2:面積 B2:Area

D1:面積 D1: Area

D2:面積 D2: Area

E:面積 E: area

IL1:電流值 IL1: current value

IL2:電流值 IL2: current value

圖1繪示本發明的一較佳具體實施例中的SIBO電源轉換器的示意圖。 FIG. 1 is a schematic diagram of a SIBO power converter in a preferred embodiment of the present invention.

圖2A至圖2G分別繪示圖1中的SIBO電源轉換器操作於不同相位下的示意圖。 FIGS. 2A to 2G respectively illustrate schematic diagrams of the SIBO power converter in FIG. 1 operating in different phases.

圖3繪示當圖1中的SIBO電源轉換器依序操作於第一相位、第四相位、特定相位及第二相位下時的電感電流及其第一開關至第五開關導通與否的時序圖。 Figure 3 illustrates the inductor current and the timing of whether the first to fifth switches are turned on when the SIBO power converter in Figure 1 operates sequentially in the first phase, the fourth phase, the specific phase and the second phase. Figure.

圖4繪示圖3與傳統SIBO電源轉換器依序操作於第一相位、第四相位及第二相位下時的電感電流及其第一開關至第五開關導通與否的時序圖之比較。 FIG. 4 shows a comparison of the inductor current and the timing diagram of whether the first to fifth switches are turned on when the conventional SIBO power converter is sequentially operated in the first phase, the fourth phase and the second phase in FIG. 3 .

圖5繪示本發明的另一較佳具體實施例中的SIBO電源轉換器的示意圖。 FIG. 5 is a schematic diagram of a SIBO power converter in another preferred embodiment of the present invention.

圖6A至圖6F分別繪示圖5中的SIBO電源轉換器操作於不同相位下的示意圖。 6A to 6F respectively illustrate schematic diagrams of the SIBO power converter in FIG. 5 operating in different phases.

圖7繪示SIBO電源轉換器依序操作於第一相位、特定相位、第四相位及第三相位下時的電感電流的時序圖與傳統SIBO電源轉換器依序操作於第一相位、第四相位及第二相位下時的電感電流的時序圖之比較。 Figure 7 shows the timing diagram of the inductor current when the SIBO power converter operates in the first phase, the specific phase, the fourth phase and the third phase in sequence, and the traditional SIBO power converter operates in the first phase, the fourth phase in sequence. Comparison of the timing diagrams of the inductor current in the first phase and the second phase.

圖8繪示SIBO電源轉換器依序操作於第一相位、特定相位、第四相位及第五相位下時的電感電流的時序圖與傳統SIBO電源轉換器依序操作於第一相位、第四相位及第二相位下時的電感電流的時序圖之比較。 Figure 8 shows the timing diagram of the inductor current when the SIBO power converter operates in the first phase, the specific phase, the fourth phase and the fifth phase in sequence, and the traditional SIBO power converter operates in the first phase, the fourth phase in sequence. Comparison of the timing diagrams of the inductor current in the first phase and the second phase.

圖9繪示SIBO電源轉換器依序操作於第一相位、第四相位、特定相位及第二相位下時的電感電流的時序圖與傳統SIBO電源轉換器依序操作於第一相位、第四相位及第二相位下時的電感電流的時序圖之比較。 Figure 9 shows the timing diagram of the inductor current when the SIBO power converter operates in the first phase, the fourth phase, the specific phase and the second phase in sequence, and the traditional SIBO power converter operates in the first phase, the fourth phase in sequence. Comparison of the timing diagrams of the inductor current in the first phase and the second phase.

圖10繪示SIBO電源轉換器依序操作於第一相位、第四相位、特定相位及第五相位下時的電感電流的時序圖與傳統SIBO電源轉換器依 序操作於第一相位、第四相位及第二相位下時的電感電流的時序圖之比較。 Figure 10 shows the timing diagram of the inductor current when the SIBO power converter operates sequentially in the first phase, the fourth phase, the specific phase and the fifth phase, and the timing diagram of the traditional SIBO power converter. Comparison of the timing diagrams of the inductor current when the sequence operates in the first phase, the fourth phase and the second phase.

圖11繪示當SIBO電源轉換器依序操作於第一相位、特定相位、第四相位及第三相位下時其第一開關至第八開關導通與否的時序圖。 FIG. 11 illustrates a timing diagram of whether the first to eighth switches of the SIBO power converter are turned on or off when the SIBO power converter operates in the first phase, the specific phase, the fourth phase and the third phase in sequence.

圖12繪示當SIBO電源轉換器依序操作於第一相位、特定相位、第四相位及第五相位下時其第一開關至第八開關導通與否的時序圖。 FIG. 12 illustrates a timing diagram of whether the first to eighth switches of the SIBO power converter are turned on or off when the SIBO power converter operates in the first phase, the specific phase, the fourth phase and the fifth phase in sequence.

圖13繪示當SIBO電源轉換器依序操作於第一相位、第四相位、特定相位及第二相位下時其第一開關至第八開關導通與否的時序圖。 FIG. 13 illustrates a timing diagram of whether the first to eighth switches of the SIBO power converter are turned on when they operate in the first phase, the fourth phase, the specific phase and the second phase in sequence.

圖14繪示當SIBO電源轉換器依序操作於第一相位、第四相位、特定相位及第五相位下時其第一開關至第八開關導通與否的時序圖。 FIG. 14 illustrates a timing diagram of whether the first to eighth switches of the SIBO power converter are turned on or off when the SIBO power converter operates in the first phase, the fourth phase, the specific phase and the fifth phase in sequence.

根據本發明之一較佳具體實施例為一種單電感雙極性輸出(SIBO)電源轉換器。於此實施例中，SIBO電源轉換器包括單一電感並分別輸出第一輸出電壓及第二輸出電壓，且SIBO電源轉換器具有五開關結構，但不以此為限。 A preferred embodiment according to the present invention is a single inductor bipolar output (SIBO) power converter. In this embodiment, the SIBO power converter includes a single inductor and outputs the first output voltage and the second output voltage respectively, and the SIBO power converter has a five-switch structure, but is not limited to this.

請參照圖1，圖1繪示此實施例中的SIBO電源轉換器1的示意圖。如圖1所示，SIBO電源轉換器1包括電感L、第一開關S1、第二開關S2、第三開關S3、第四開關S4、第五開關S5、第一電容COP及第二電容CON。電感L具有第一端LXN及第二端LXP且電感電流IL流經電感L。第一開關S1耦接於輸入電壓VIN與第一端LXN之間。第二開關S2耦接於第一端LXN與第二輸出電壓VON之間。第三開關S3耦接於第二端LXP與第一輸出電壓VOP之間。第四開關S4耦接於第二端LXP與接地端 GND之間。第五開關S5耦接於第一端LXN與接地端GND之間。第一電容COP及第二電容CON彼此串接。第一電容COP耦接於第一輸出電壓VOP與接地端GND之間且第二電容CON耦接於接地端GND與第二輸出電壓VON之間。 Please refer to FIG. 1 , which is a schematic diagram of the SIBO power converter 1 in this embodiment. As shown in Figure 1, the SIBO power converter 1 includes an inductor L, a first switch S1, a second switch S2, a third switch S3, a fourth switch S4, a fifth switch S5, a first capacitor COP and a second capacitor CON. The inductor L has a first terminal LXN and a second terminal LXP, and the inductor current IL flows through the inductor L. The first switch S1 is coupled between the input voltage VIN and the first terminal LXN. The second switch S2 is coupled between the first terminal LXN and the second output voltage VON. The third switch S3 is coupled between the second terminal LXP and the first output voltage VOP. The fourth switch S4 is coupled between the second terminal LXP and the ground terminal. between GND. The fifth switch S5 is coupled between the first terminal LXN and the ground terminal GND. The first capacitor COP and the second capacitor CON are connected in series with each other. The first capacitor COP is coupled between the first output voltage VOP and the ground terminal GND, and the second capacitor CON is coupled between the ground terminal GND and the second output voltage VON.

需說明的是，當此實施例中的SIBO電源轉換器1操作於特定相位(例如圖2E所示的Ph E)下時，第二開關S2與第三開關S3導通且第一開關S1、第四開關S4及第五開關S5不導通，致使第一輸出電壓VOP與第二輸出電壓VON同時放電而降低電感電流IL的峰值，但不以此為限。 It should be noted that when the SIBO power converter 1 in this embodiment operates in a specific phase (such as Ph E shown in FIG. 2E), the second switch S2 and the third switch S3 are turned on and the first switch S1 and the third switch S3 are turned on. The fourth switch S4 and the fifth switch S5 are not conductive, causing the first output voltage VOP and the second output voltage VON to be discharged at the same time, thereby reducing the peak value of the inductor current IL, but it is not limited to this.

請參照圖2A至圖2G，圖2A至圖2G分別繪示圖1中的SIBO電源轉換器1操作於不同相位下的示意圖。 Please refer to FIGS. 2A to 2G , which respectively illustrate schematic diagrams of the SIBO power converter 1 in FIG. 1 operating in different phases.

如圖2A所示，當SIBO電源轉換器1操作於第一相位Ph A下時，第一開關S1及第四開關S4導通且第二開關S2、第三開關S3及第五開關S5不導通，形成了從輸入電壓VIN經第一開關S1、電感L、第四開關S4至接地端GND的導通路徑，藉以進行對電感L充電。 As shown in Figure 2A, when the SIBO power converter 1 operates in the first phase Ph A, the first switch S1 and the fourth switch S4 are turned on and the second switch S2, the third switch S3 and the fifth switch S5 are not turned on. A conductive path is formed from the input voltage VIN through the first switch S1, the inductor L, and the fourth switch S4 to the ground terminal GND, thereby charging the inductor L.

如圖2B所示，當SIBO電源轉換器1操作於第二相位Ph B下時，第二開關S2及第四開關S4導通且第一開關S1、第三開關S3及第五開關S5不導通，形成了從第二輸出電壓VON、第二開關S2、電感L、第四開關S4至接地端GND的導通路徑，致使第二輸出電壓VON放電。 As shown in Figure 2B, when the SIBO power converter 1 operates in the second phase Ph B, the second switch S2 and the fourth switch S4 are turned on and the first switch S1, the third switch S3 and the fifth switch S5 are not turned on. A conduction path is formed from the second output voltage VON, the second switch S2, the inductor L, the fourth switch S4 to the ground terminal GND, causing the second output voltage VON to discharge.

如圖2C所示，當SIBO電源轉換器1操作於第三相位Ph C下時，第三開關S3及第五開關S5導通且第一開關S1、第二開關S2及第 四開關S4不導通，形成了從接地端GND、第五開關S5、電感L、第三開關S3至第一輸出電壓VOP的導通路徑。 As shown in FIG. 2C , when the SIBO power converter 1 operates in the third phase Ph C, the third switch S3 and the fifth switch S5 are turned on, and the first switch S1 , the second switch S2 and the fifth switch S5 are turned on. The fourth switch S4 is non-conductive, forming a conductive path from the ground terminal GND, the fifth switch S5, the inductor L, the third switch S3 to the first output voltage VOP.

如圖2D所示，當SIBO電源轉換器1操作於第四相位Ph D下時，第一開關S1及第三開關S3導通且第二開關S2、第四開關S4及第五開關S5不導通，形成了從輸入電壓VIN經第一開關S1、電感L、第三開關S3至第一輸出電壓VOP的導通路徑，致使輸入電壓VIN對第一輸出電壓VOP放電。 As shown in Figure 2D, when the SIBO power converter 1 operates in the fourth phase Ph D, the first switch S1 and the third switch S3 are turned on and the second switch S2, the fourth switch S4 and the fifth switch S5 are not turned on. A conduction path is formed from the input voltage VIN to the first output voltage VOP through the first switch S1, the inductor L, and the third switch S3, causing the input voltage VIN to discharge the first output voltage VOP.

如圖2E所示，當SIBO電源轉換器1操作於特定相位Ph E下時，第二開關S2與第三開關S3導通且第一開關S1、第四開關S4及第五開關S5不導通，形成了從第二輸出電壓VON、第二開關S2、電感L、第三開關S3至第一輸出電壓VOP的導通路徑，致使第一輸出電壓VOP與第二輸出電壓VON同時放電，藉以降低流經電感L的電感電流IL的峰值，但不以此為限。 As shown in Figure 2E, when the SIBO power converter 1 operates at a specific phase Ph E, the second switch S2 and the third switch S3 are turned on and the first switch S1, the fourth switch S4 and the fifth switch S5 are not turned on, forming The conduction path from the second output voltage VON, the second switch S2, the inductor L, the third switch S3 to the first output voltage VOP is established, causing the first output voltage VOP and the second output voltage VON to discharge at the same time, thereby reducing the flow through the inductance The peak value of the inductor current IL of L, but is not limited to this.

如圖2F所示，當SIBO電源轉換器1操作於第五相位Ph ZC下時，第四開關S4導通且第一開關S1、第二開關S2、第三開關S3及第五開關S5不導通，形成了從電感L、第四開關S4至接地端GND的導通路徑，藉以進行電感L的第一端LXN浮接(Floating)以及電感L的第二端LXP接地。 As shown in Figure 2F, when the SIBO power converter 1 operates in the fifth phase Ph ZC, the fourth switch S4 is turned on and the first switch S1, the second switch S2, the third switch S3 and the fifth switch S5 are not turned on. A conductive path is formed from the inductor L, the fourth switch S4 to the ground terminal GND, whereby the first end LXN of the inductor L is floating and the second end LXP of the inductor L is grounded.

如圖2G所示，當SIBO電源轉換器1操作於第六相位Ph ZC2下時，第五開關S5導通且第一開關S1、第二開關S2、第三開關S3及第四開關S4不導通，形成了從電感L、第五開關S5至接地端GND的導通 路徑，藉以進行電感L的第一端LXN接地以及電感L的第二端LXP浮接(Floating)。 As shown in Figure 2G, when the SIBO power converter 1 operates in the sixth phase Ph ZC2, the fifth switch S5 is turned on and the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 are not turned on. A conduction is formed from the inductor L, the fifth switch S5 to the ground terminal GND. path, whereby the first terminal LXN of the inductor L is grounded and the second terminal LXP of the inductor L is floating.

於實際應用中，SIBO電源轉換器1可依序操作於特定相位Ph E及第二相位Ph B、或依序操作於特定相位Ph E及第三相位Ph C、或依序操作於第四相位Ph D及特定相位Ph E，但不以此為限。 In practical applications, the SIBO power converter 1 can operate in the specific phase Ph E and the second phase Ph B in sequence, or in the specific phase Ph E and the third phase Ph C in sequence, or in the fourth phase in sequence. Ph D and specific phase Ph E, but not limited to this.

請參照圖3，圖3繪示當圖1中的SIBO電源轉換器1依序操作於第一相位Ph A、第四相位Ph D、特定相位Ph E及第二相位Ph B下時的電感電流IL及其第一開關S1至第五開關S5導通與否的時序圖。 Please refer to Figure 3. Figure 3 illustrates the inductor current when the SIBO power converter 1 in Figure 1 operates sequentially in the first phase Ph A, the fourth phase Ph D, the specific phase Ph E and the second phase Ph B. Timing diagram of whether IL and its first switch S1 to fifth switch S5 are on or off.

如圖3所示，在第一導通時間T1內，SIBO電源轉換器1操作於第一相位Ph A下，第一開關S1及第四開關S4導通且第二開關S2、第三開關S3及第五開關S5不導通，藉以由輸入電壓VIN對電感L充電，使得在第一導通時間T1結束時的電感電流等於電流值IL1。需說明的是，第一導通時間T1係由電流值VESUM和鋸齒波信號SAW1決定，但不以此為限。 As shown in Figure 3, during the first conduction time T1, the SIBO power converter 1 operates in the first phase Ph A, the first switch S1 and the fourth switch S4 are turned on, and the second switch S2, the third switch S3 and the third switch S4 are turned on. The fifth switch S5 is non-conductive, thereby charging the inductor L with the input voltage VIN, so that the inductor current at the end of the first conduction time T1 is equal to the current value IL1. It should be noted that the first conduction time T1 is determined by the current value VESUM and the sawtooth wave signal SAW1, but is not limited thereto.

在第二導通時間T2內，SIBO電源轉換器1操作於第四相位Ph D下，第一開關S1及第三開關S3導通且第二開關S2、第四開關S4及第五開關S5不導通，若輸入電壓VIN>第一輸出電壓VOP，則輸入電壓VI對電感L充電，使得在第二導通時間T2結束時的電感電流等於電流值IL2。需說明的是，第二導通時間T2係由電流峰值VEP和鋸齒波信號SAW2決定，但不以此為限。電感電流IL在第二導通時間T2內增大的斜率會小於在第一導通時間T1內增大的斜率。 During the second conduction time T2, the SIBO power converter 1 operates in the fourth phase Ph D, the first switch S1 and the third switch S3 are conductive and the second switch S2, the fourth switch S4 and the fifth switch S5 are not conductive, If the input voltage VIN > the first output voltage VOP, the input voltage VI charges the inductor L, so that the inductor current at the end of the second on-time T2 is equal to the current value IL2. It should be noted that the second conduction time T2 is determined by the current peak value VEP and the sawtooth wave signal SAW2, but is not limited thereto. The slope of the increase of the inductor current IL during the second conduction time T2 will be smaller than the slope of the increase during the first conduction time T1.

在第三導通時間T3內，SIBO電源轉換器1操作於特定相位Ph E，第二開關S2與第三開關S3導通且第一開關S1、第四開關S4及第五開關S5不導通，藉以讓第一輸出電壓VOP與第二輸出電壓VON同時放電，使得電感電流IL在第三導通時間T3內從電流值IL2往下降。 During the third conduction time T3, the SIBO power converter 1 operates in the specific phase Ph E, the second switch S2 and the third switch S3 are conductive and the first switch S1, the fourth switch S4 and the fifth switch S5 are not conductive, thereby allowing The first output voltage VOP and the second output voltage VON are discharged simultaneously, so that the inductor current IL decreases from the current value IL2 during the third conduction time T3.

在第四導通時間T4內，SIBO電源轉換器1操作於第二相位Ph B下，第二開關S2及第四開關S4導通且第一開關S1、第三開關S3及第五開關S5不導通，藉以讓第二輸出電壓VON放電，使得電感電流IL在第四導通時間T4內持續往下降至零。 During the fourth conduction time T4, the SIBO power converter 1 operates in the second phase Ph B, the second switch S2 and the fourth switch S4 are conductive and the first switch S1, the third switch S3 and the fifth switch S5 are not conductive, Thereby, the second output voltage VON is discharged, so that the inductor current IL continues to decrease to zero during the fourth on-time T4.

接著，圖4繪示圖3與傳統SIBO電源轉換器依序操作於第一相位Ph A、第四相位Ph D及第二相位Ph B下時的電感電流IL的時序圖之比較。 Next, FIG. 4 shows a comparison of the timing diagrams of the inductor current IL in FIG. 3 and that of the conventional SIBO power converter when the first phase Ph A, the fourth phase Ph D and the second phase Ph B are sequentially operated.

如圖4所示，由於傳統SIBO電源轉換器在第二導通時間T2內操作於第四相位Ph D且在第三導通時間T3內操作於第二相位Ph B，而本發明的SIBO電源轉換器1在第二導通時間T2’內操作於第四相位Ph D、在第三導通時間T3’內操作於特定相位Ph E及在第四導通時間T4’內操作於第二相位Ph B，本發明的SIBO電源轉換器1在第二導通時間T2’內操作於第四相位Ph D下時的電感電流IL與時間圍成的面積D2加上其在第三導通時間T3’內操作於特定相位Ph E下時的電感電流IL與時間圍成的面積E會等於傳統SIBO電源轉換器在第二導通時間T2內操作於第四相位Ph D下時的電感電流IL與時間圍成的面積D1，並且本發明的SIBO電源轉換器1在第三導通時間T3’內操作於特定相位Ph E下時的電感電流IL與時間圍成的面積E加上其在第四導通時間T4’內操作於第 二相位Ph B下時的電感電流IL與時間圍成的面積B2會等於傳統SIBO電源轉換器在第三導通時間T3內操作於第二相位Ph B下時的電感電流IL與時間圍成的面積B1。 As shown in Figure 4, since the conventional SIBO power converter operates in the fourth phase Ph D during the second conduction time T2 and operates in the second phase Ph B during the third conduction time T3, the SIBO power converter of the present invention 1. Operate at the fourth phase Ph D during the second conduction time T2', operate at the specific phase Ph E during the third conduction time T3', and operate at the second phase Ph B during the fourth conduction time T4'. The present invention When the SIBO power converter 1 operates in the fourth phase Ph D during the second conduction time T2', the area D2 enclosed by the inductor current IL and time plus when it operates in the specific phase Ph during the third conduction time T3' The area E enclosed by the inductor current IL and time when E is equal to the area D1 enclosed by the inductor current IL and time when the traditional SIBO power converter operates in the fourth phase Ph D during the second on-time T2, and When the SIBO power converter 1 of the present invention operates at a specific phase Ph E during the third conduction time T3', the area E enclosed by the inductor current IL and time plus it operates at the third conduction time T4' The area B2 enclosed by the inductor current IL and time during the second phase Ph B will be equal to the area enclosed by the inductor current IL and time when the traditional SIBO power converter operates under the second phase Ph B during the third on-time T3. B1.

本發明的SIBO電源轉換器1的電感電流IL在第二導通時間T2’內操作於第四相位Ph D下所達到的電感電流IL的峰值IL2明顯低於傳統SIBO電源轉換器在第二導通時間T2內操作於第四相位Ph D下所達到的電感電流IL的峰值IL1，且兩者之差值為△IL。 The inductor current IL of the SIBO power converter 1 of the present invention operates in the fourth phase Ph D during the second conduction time T2', and the peak value IL2 of the inductor current IL reached is significantly lower than that of the traditional SIBO power converter during the second conduction time. The peak value IL1 of the inductor current IL reached when operating in the fourth phase Ph D in T2, and the difference between the two is △IL.

請參照圖5，圖5繪示本發明的另一較佳具體實施例中的SIBO電源轉換器5的示意圖。如圖5所示，SIBO電源轉換器5包括電感L、第一開關S1、第二開關S2、第三開關S3、充電泵CP、第五開關S5、第一電容COP及第二電容CON。電感L具有第一端LXN及第二端LXP且電感電流IL流經電感L。第一開關S1耦接於輸入電壓VIN與第一端LXN之間。第二開關S2耦接於第一端LXN與第二輸出電壓VON之間。第三開關S3耦接於第二端LXP與第一輸出電壓VOP之間。 Please refer to FIG. 5 , which is a schematic diagram of the SIBO power converter 5 in another preferred embodiment of the present invention. As shown in Figure 5, the SIBO power converter 5 includes an inductor L, a first switch S1, a second switch S2, a third switch S3, a charge pump CP, a fifth switch S5, a first capacitor COP and a second capacitor CON. The inductor L has a first terminal LXN and a second terminal LXP, and the inductor current IL flows through the inductor L. The first switch S1 is coupled between the input voltage VIN and the first terminal LXN. The second switch S2 is coupled between the first terminal LXN and the second output voltage VON. The third switch S3 is coupled between the second terminal LXP and the first output voltage VOP.

充電泵CP包括飛跨電容Cfly、第四開關S4、第六開關S6、第七開關S7及第八開關S8。第四開關S4與第七開關S7串接於第二端LXP與接地端GND之間且第六開關S6與第八開關S8串接於輸入電壓VIN與接地端GND之間。飛跨電容Cfly之一端耦接至第六開關S6與第八開關S8之間且飛跨電容Cfly之另一端耦接至第四開關S4與第七開關S7之間。第五開關S5耦接於第一端LXN與接地端GND之間。第一電容COP及第二電容CON彼此串接。第一電容COP耦接於第一輸出電壓VOP與接 地端GND之間且第二電容CON耦接於接地端GND與第二輸出電壓VON之間。 The charge pump CP includes a flying capacitor Cfly, a fourth switch S4, a sixth switch S6, a seventh switch S7 and an eighth switch S8. The fourth switch S4 and the seventh switch S7 are connected in series between the second terminal LXP and the ground terminal GND, and the sixth switch S6 and the eighth switch S8 are connected in series between the input voltage VIN and the ground terminal GND. One end of the flying capacitor Cfly is coupled between the sixth switch S6 and the eighth switch S8 and the other end of the flying capacitor Cfly is coupled between the fourth switch S4 and the seventh switch S7. The fifth switch S5 is coupled between the first terminal LXN and the ground terminal GND. The first capacitor COP and the second capacitor CON are connected in series with each other. The first capacitor COP is coupled between the first output voltage VOP and the between the ground terminal GND and the second capacitor CON is coupled between the ground terminal GND and the second output voltage VON.

需說明的是，當SIBO電源轉換器5操作於特定相位Ph Bc下時，第二開關S2、第四開關S4與第八開關S8導通且第一開關S1、第三開關S3、第五開關S5、第六開關S6及第七開關S7不導通，致使第二輸出電壓VON與飛跨電容Cfly同時放電而降低電感電流IL的峰值。 It should be noted that when the SIBO power converter 5 operates in a specific phase Ph Bc, the second switch S2, the fourth switch S4 and the eighth switch S8 are turned on and the first switch S1, the third switch S3 and the fifth switch S5 , the sixth switch S6 and the seventh switch S7 are not conductive, causing the second output voltage VON and the flying capacitor Cfly to be discharged at the same time, thereby reducing the peak value of the inductor current IL.

請參照圖6A至圖6F，圖6A至圖6F分別繪示圖5中的SIBO電源轉換器5操作於不同相位下的示意圖。 Please refer to FIGS. 6A to 6F , which respectively illustrate schematic diagrams of the SIBO power converter 5 in FIG. 5 operating in different phases.

如圖6A所示，當SIBO電源轉換器5操作於第一相位Ph A下時，第一開關S1、第四開關S4、第六開關S6及第七開關S7導通且第二開關S2、第三開關S3、第五開關S5及第八開關S8不導通，形成從輸入電壓VIN經第一開關S1、電感L、第四開關S4、第七開關S7至接地端GND的導通路徑以及從輸入電壓VIN經第六開關S6、飛跨電容Cfly、第七開關S7至接地端GND的導通路徑，使得電感L與飛跨電容Cfly儲能。 As shown in FIG. 6A , when the SIBO power converter 5 operates in the first phase Ph A, the first switch S1 , the fourth switch S4 , the sixth switch S6 and the seventh switch S7 are turned on and the second switch S2 and the third switch S7 are turned on. The switch S3, the fifth switch S5 and the eighth switch S8 are non-conductive, forming a conductive path from the input voltage VIN through the first switch S1, the inductor L, the fourth switch S4 and the seventh switch S7 to the ground terminal GND and from the input voltage VIN The conductive path through the sixth switch S6, the flying capacitor Cfly, and the seventh switch S7 to the ground terminal GND allows the inductor L and the flying capacitor Cfly to store energy.

如圖6B所示，當SIBO電源轉換器5操作於第二相位Ph B下時，第二開關S2、第四開關S4、第六開關S6及第七開關S7導通且第一開關S1、第三開關S3、第五開關S5及第八開關S8不導通，形成從第二輸出電壓VON經第二開關S2、電感L、第四開關S4、第七開關S7至接地端GND的導通路徑以及從輸入電壓VIN經第六開關S6、飛跨電容Cfly、第七開關S7至接地端GND的導通路徑，致使第二輸出電壓VON放電且飛跨電容Cfly儲能。 As shown in FIG. 6B , when the SIBO power converter 5 operates in the second phase Ph B, the second switch S2 , the fourth switch S4 , the sixth switch S6 and the seventh switch S7 are turned on and the first switch S1 and the third switch S7 are turned on. The switch S3, the fifth switch S5 and the eighth switch S8 are non-conductive, forming a conductive path from the second output voltage VON through the second switch S2, the inductor L, the fourth switch S4 and the seventh switch S7 to the ground terminal GND and from the input The voltage VIN passes through the conduction path of the sixth switch S6, the flying capacitor Cfly, and the seventh switch S7 to the ground terminal GND, causing the second output voltage VON to be discharged and the flying capacitor Cfly to store energy.

如圖6C所示，當SIBO電源轉換器5操作於第三相位Ph C下時，第三開關S3、第五開關S5、第六開關S6及第七開關S7導通且第一開關S1、第二開關S2、第四開關S4及第八開關S8不導通，形成從接地端GND經第五開關S5、電感L、第三開關S3至第一輸出電壓VOP的導通路徑以及從輸入電壓VIN經第六開關S6、飛跨電容Cfly、第七開關S7至接地端GND的導通路徑，致使電感L對第一輸出電壓VOP充電且飛跨電容Cfly儲能。 As shown in FIG. 6C , when the SIBO power converter 5 operates in the third phase Ph C, the third switch S3 , the fifth switch S5 , the sixth switch S6 and the seventh switch S7 are turned on and the first switch S1 and the second switch S7 are turned on. The switch S2, the fourth switch S4 and the eighth switch S8 are non-conductive, forming a conductive path from the ground terminal GND through the fifth switch S5, the inductor L, the third switch S3 to the first output voltage VOP and from the input voltage VIN through the sixth The conduction path between the switch S6, the flying capacitor Cfly, and the seventh switch S7 and the ground terminal GND causes the inductor L to charge the first output voltage VOP and the flying capacitor Cfly to store energy.

如圖6D所示，當SIBO電源轉換器5操作於第四相位Ph D下時，第一開關S1、第三開關S3、第六開關S6及第七開關S7導通且第二開關S2、第四開關S4、第五開關S5及第八開關S8不導通，形成從輸入電壓VIN經第一開關S1、電感L、第三開關S3至第一輸出電壓VOP的導通路徑以及從輸入電壓VIN經第六開關S6、飛跨電容Cfly、第七開關S7至接地端GND的導通路徑，致使電感L對第一輸出電壓VOP充電且飛跨電容Cfly儲能。 As shown in FIG. 6D , when the SIBO power converter 5 operates in the fourth phase Ph D, the first switch S1 , the third switch S3 , the sixth switch S6 and the seventh switch S7 are turned on and the second switch S2 and the fourth switch S7 are turned on. The switch S4, the fifth switch S5 and the eighth switch S8 are non-conductive, forming a conductive path from the input voltage VIN through the first switch S1, the inductor L, the third switch S3 to the first output voltage VOP and from the input voltage VIN through the sixth The conduction path between the switch S6, the flying capacitor Cfly, and the seventh switch S7 and the ground terminal GND causes the inductor L to charge the first output voltage VOP and the flying capacitor Cfly to store energy.

如圖6E所示，當SIBO電源轉換器5操作於第五相位Ph E下時，第二開關S2、第三開關S3、第六開關S6及第七開關S7導通且第一開關S1、第四開關S4、第五開關S5及第八開關S8不導通，形成從第二輸出電壓VON經第二開關S2、電感L、第三開關S3至第一輸出電壓VOP的導通路徑以及從輸入電壓VIN經第六開關S6、飛跨電容Cfly、第七開關S7至接地端GND的導通路徑，致使第一輸出電壓VOP及第二輸出電壓VON充/放電且飛跨電容Cfly儲能。 As shown in FIG. 6E , when the SIBO power converter 5 operates in the fifth phase Ph E, the second switch S2 , the third switch S3 , the sixth switch S6 and the seventh switch S7 are turned on and the first switch S1 and the fourth switch S7 are turned on. The switch S4, the fifth switch S5 and the eighth switch S8 are non-conductive, forming a conductive path from the second output voltage VON to the first output voltage VOP through the second switch S2, the inductor L and the third switch S3 and from the input voltage VIN through The conduction path between the sixth switch S6, the flying capacitor Cfly, and the seventh switch S7 and the ground terminal GND causes the first output voltage VOP and the second output voltage VON to charge/discharge and the flying capacitor Cfly stores energy.

如圖6F所示，當SIBO電源轉換器5操作於特定相位Ph Bc下時，第二開關S2、第四開關S4與第八開關S8導通且第一開關S1、第三開關S3、第五開關S5、第六開關S6及第七開關S7不導通，形成從第二輸出電壓VON經第二開關S2、電感L、第四開關S4、飛跨電容Cfly、第八開關S8至接地端GND的導通路徑，致使第二輸出電壓VON與飛跨電容Cfly同時放電而降低電感電流IL的峰值。 As shown in FIG. 6F, when the SIBO power converter 5 operates at a specific phase Ph Bc, the second switch S2, the fourth switch S4 and the eighth switch S8 are turned on and the first switch S1, the third switch S3 and the fifth switch are turned on. S5, the sixth switch S6 and the seventh switch S7 are not conductive, forming conduction from the second output voltage VON through the second switch S2, the inductor L, the fourth switch S4, the flying capacitor Cfly, the eighth switch S8 to the ground terminal GND. path, causing the second output voltage VON and the flying capacitor Cfly to discharge simultaneously, thereby reducing the peak value of the inductor current IL.

Figure 111141671-A0305-02-0017-1
Figure 111141671-A0305-02-0017-1

請參照表1，表1分別列出不同相位的說明及電感跨壓。舉例而言，在第一相位Ph A下，電感L與飛跨電容Cfly儲能且電感跨壓 =輸入電壓VIN>0；在第二相位Ph B下，第二輸出電壓VON放電且飛跨電容Cfly儲能，電感跨壓=第二輸出電壓VON<0；其餘可依此類推，於此不另行贅述。 Please refer to Table 1, which lists the descriptions of different phases and the inductor cross-voltage. For example, in the first phase Ph A, the inductor L and the flying capacitor Cfly store energy and the voltage across the inductor =Input voltage VIN>0; in the second phase Ph B, the second output voltage VON is discharged and the flying capacitor Cfly stores energy, the inductor cross voltage = the second output voltage VON<0; the rest can be deduced in the same way, and will not be used here. More details to come.

Figure 111141671-A0305-02-0018-2
Figure 111141671-A0305-02-0018-2

請參照表2，表2分別列出不同的相位順序可能組合。舉例而言，第一種相位順序可能組合是SIBO電源轉換器5在第一導通時間T1至第四導通時間T4下分別操作於第一相位Ph A、特定相位Ph Bc、第四相位Ph D及第三相位Ph C；第二種相位順序可能組合是SIBO電源轉換器5在第一導通時間T1至第四導通時間T4下分別操作於第一相位Ph A、特定相位Ph Bc、第四相位Ph D及第五相位Ph E；其餘可依此類推，於此不另行贅述。 Please refer to Table 2, which lists different possible combinations of phase sequences. For example, the first possible combination of phase sequences is that the SIBO power converter 5 operates in the first phase Ph A, the specific phase Ph Bc, the fourth phase Ph D and The third phase Ph C; the second possible combination of phase sequences is that the SIBO power converter 5 operates in the first phase Ph A, the specific phase Ph Bc, and the fourth phase Ph during the first conduction time T1 to the fourth conduction time T4 respectively. D and the fifth phase Ph E; the rest can be deduced in this way and will not be described again here.

請參照圖7，圖7繪示SIBO電源轉換器依序操作於第一相位Ph A、特定相位Ph Bc、第四相位Ph D及第三相位Ph C下時的電感電流IL的時序圖與傳統SIBO電源轉換器依序操作於第一相位Ph A、第四相位Ph D及第二相位Ph B下時的電感電流IL的時序圖之比較。 Please refer to Figure 7. Figure 7 illustrates the timing diagram of the inductor current IL when the SIBO power converter operates sequentially in the first phase Ph A, the specific phase Ph Bc, the fourth phase Ph D and the third phase Ph C and the traditional Comparison of the timing diagrams of the inductor current IL when the SIBO power converter operates sequentially in the first phase Ph A, the fourth phase Ph D and the second phase Ph B.

如圖7所示，SIBO電源轉換器依序操作於第一相位Ph A、特定相位Ph Bc、第四相位Ph D及第三相位Ph C下時的電感電流IL的峰值明顯小於傳統SIBO電源轉換器依序操作於第一相位Ph A、第四相位Ph D及第二相位Ph B下時的電感電流IL的峰值，代表SIBO電源轉換器依序操作於第一相位Ph A、特定相位Ph Bc、第四相位Ph D及第三相位Ph C下有助於降低電感電流的峰值，連帶使得系統導通功耗變小，故能有效提升SIBO電源轉換器的重載效率。 As shown in Figure 7, when the SIBO power converter operates sequentially in the first phase Ph A, the specific phase Ph Bc, the fourth phase Ph D, and the third phase Ph C, the peak value of the inductor current IL is significantly smaller than that of the traditional SIBO power converter. The peak value of the inductor current IL when the device operates in the first phase Ph A, the fourth phase Ph D and the second phase Ph B in sequence, which represents the SIBO power converter operating in the first phase Ph A and the specific phase Ph Bc in sequence. , the fourth phase Ph D and the third phase Ph C help to reduce the peak value of the inductor current, which also reduces the system conduction power consumption, so it can effectively improve the heavy-load efficiency of the SIBO power converter.

同理，如圖8所示，SIBO電源轉換器依序操作於第一相位Ph A、特定相位Ph Bc、第四相位Ph D及第五相位Ph E下時的電感電流IL的峰值明顯小於傳統SIBO電源轉換器依序操作於第一相位Ph A、第四相位Ph D及第二相位Ph B下時的電感電流IL的峰值，代表SIBO電源轉換器依序操作於第一相位Ph A、特定相位Ph Bc、第四相位Ph D及第五相位Ph E下有助於降低電感電流的峰值，連帶使得系統導通功耗變小，故能有效提升SIBO電源轉換器的重載效率。 Similarly, as shown in Figure 8, when the SIBO power converter operates sequentially in the first phase Ph A, the specific phase Ph Bc, the fourth phase Ph D and the fifth phase Ph E, the peak value of the inductor current IL is significantly smaller than that of the traditional The peak value of the inductor current IL when the SIBO power converter sequentially operates in the first phase Ph A, the fourth phase Ph D and the second phase Ph B represents that the SIBO power converter sequentially operates in the first phase Ph A, a specific The phase Ph Bc, the fourth phase Ph D and the fifth phase Ph E help to reduce the peak value of the inductor current, which also reduces the system conduction power consumption, so it can effectively improve the heavy-load efficiency of the SIBO power converter.

同理，如圖9所示，SIBO電源轉換器依序操作於第一相位Ph A、第四相位Ph D、特定相位Ph Bc及第二相位Ph B下時的電感電流IL的峰值明顯小於傳統SIBO電源轉換器依序操作於第一相位Ph A、第四相位Ph D及第二相位Ph B下時的電感電流IL的峰值，連帶使得系統導通功耗變小，故能有效提升SIBO電源轉換器的重載效率。 Similarly, as shown in Figure 9, when the SIBO power converter operates sequentially in the first phase Ph A, the fourth phase Ph D, the specific phase Ph Bc and the second phase Ph B, the peak value of the inductor current IL is significantly smaller than that of the traditional The peak value of the inductor current IL when the SIBO power converter operates sequentially in the first phase Ph A, the fourth phase Ph D and the second phase Ph B, which in turn makes the system conduction power consumption smaller, so it can effectively improve SIBO power conversion. The overload efficiency of the processor.

同理，如圖10所示，SIBO電源轉換器依序操作於第一相位Ph A、第四相位Ph D、特定相位Ph Bc及第五相位Ph E下時的電感電流IL的峰值明顯小於傳統SIBO電源轉換器依序操作於第一相位Ph A、 第四相位Ph D及第二相位Ph B下時的電感電流IL的峰值，連帶使得系統導通功耗變小，故能有效提升SIBO電源轉換器的重載效率。 Similarly, as shown in Figure 10, when the SIBO power converter operates sequentially in the first phase Ph A, the fourth phase Ph D, the specific phase Ph Bc and the fifth phase Ph E, the peak value of the inductor current IL is significantly smaller than that of the traditional The SIBO power converter operates in the first phase Ph A, The peak value of the inductor current IL in the fourth phase Ph D and the second phase Ph B also reduces the system conduction power consumption, so it can effectively improve the heavy-load efficiency of the SIBO power converter.

請參照圖11，圖11繪示當SIBO電源轉換器5依序操作於第一相位Ph A、特定相位Ph Bc、第四相位Ph D及第三相位Ph C下時其第一開關S1至第八開關S8導通與否的時序圖。 Please refer to FIG. 11. FIG. 11 illustrates that when the SIBO power converter 5 operates in the first phase Ph A, the specific phase Ph Bc, the fourth phase Ph D and the third phase Ph C, the first switch S1 to the third phase are sequentially operated. Timing diagram of eight switches S8 turning on or off.

如圖11所示，於第一導通時間T1內，SIBO電源轉換器5操作於第一相位Ph A下，第一開關S1、第四開關S4、第六開關S6及第七開關S7導通且第二開關S2、第三開關S3、第五開關S5及第八開關S8不導通，藉以讓電感L與飛跨電容Cfly儲能。 As shown in Figure 11, during the first conduction time T1, the SIBO power converter 5 operates in the first phase Ph A, the first switch S1, the fourth switch S4, the sixth switch S6 and the seventh switch S7 are turned on and the The second switch S2, the third switch S3, the fifth switch S5 and the eighth switch S8 are non-conductive, thereby allowing the inductor L and the flying capacitor Cfly to store energy.

於第二導通時間T2內，SIBO電源轉換器5操作於特定相位Ph Bc下，第二開關S2、第四開關S4與第八開關S8導通且第一開關S1、第三開關S3、第五開關S5、第六開關S6及第七開關S7不導通，致使第二輸出電壓VON與飛跨電容Cfly同時放電，藉以降低電感電流IL的峰值。 During the second conduction time T2, the SIBO power converter 5 operates in a specific phase Ph Bc, the second switch S2, the fourth switch S4 and the eighth switch S8 are turned on and the first switch S1, the third switch S3 and the fifth switch are turned on. S5, the sixth switch S6 and the seventh switch S7 are not conductive, causing the second output voltage VON and the flying capacitor Cfly to be discharged simultaneously, thereby reducing the peak value of the inductor current IL.

於第三導通時間T3(常數)內，SIBO電源轉換器5操作於第四相位Ph D下，第一開關S1、第三開關S3、第六開關S6及第七開關S7導通且第二開關S2、第四開關S4、第五開關S5及第八開關S8不導通，致使電感L對第一輸出電壓VOP充電且飛跨電容Cfly儲能。 During the third conduction time T3 (constant), the SIBO power converter 5 operates in the fourth phase Ph D, the first switch S1, the third switch S3, the sixth switch S6 and the seventh switch S7 are turned on and the second switch S2 , the fourth switch S4, the fifth switch S5 and the eighth switch S8 are not conductive, causing the inductor L to charge the first output voltage VOP and the flying capacitor Cfly to store energy.

於第四導通時間T4內，SIBO電源轉換器操作於第三相位Ph C下，第三開關S3、第五開關S5、第六開關S6及第七開關S7導通且第一開關S1、第二開關S2、第四開關S4及第八開關S8不導通，致使電感L對第一輸出電壓VOP充電且飛跨電容Cfly儲能。 During the fourth conduction time T4, the SIBO power converter operates in the third phase Ph C, the third switch S3, the fifth switch S5, the sixth switch S6 and the seventh switch S7 are turned on and the first switch S1 and the second switch S2, the fourth switch S4 and the eighth switch S8 are not conductive, causing the inductor L to charge the first output voltage VOP and the flying capacitor Cfly to store energy.

於第五導通時間T5內，SIBO電源轉換器操作於第六相位Ph ZC下，第四開關S4、第六開關S6及第七開關S7導通且第一開關S1、第二開關S2、第三開關S3、第五開關S5及第八開關S8不導通，藉以讓電感L及飛跨電容Cfly同時放電。 During the fifth conduction time T5, the SIBO power converter operates in the sixth phase Ph ZC, the fourth switch S4, the sixth switch S6 and the seventh switch S7 are turned on and the first switch S1, the second switch S2 and the third switch S3, the fifth switch S5 and the eighth switch S8 are not conductive, thereby allowing the inductor L and the flying capacitor Cfly to discharge at the same time.

請參照圖12，圖12繪示當SIBO電源轉換器5依序操作於第一相位Ph A、特定相位Ph Bc、第四相位Ph D及第五相位Ph E下時其第一開關S1至第八開關S8導通與否的時序圖。 Please refer to Figure 12. Figure 12 illustrates that when the SIBO power converter 5 operates sequentially in the first phase Ph A, the specific phase Ph Bc, the fourth phase Ph D and the fifth phase Ph E, its first switches S1 to Timing diagram of eight switches S8 turning on or off.

如圖12所示，於第一導通時間T1內，SIBO電源轉換器5操作於第一相位Ph A下，第一開關S1、第四開關S4、第六開關S6及第七開關S7導通且第二開關S2、第三開關S3、第五開關S5及第八開關S8不導通，藉以讓電感L與飛跨電容Cfly儲能。 As shown in Figure 12, during the first conduction time T1, the SIBO power converter 5 operates in the first phase Ph A, the first switch S1, the fourth switch S4, the sixth switch S6 and the seventh switch S7 are turned on and the The second switch S2, the third switch S3, the fifth switch S5 and the eighth switch S8 are non-conductive, thereby allowing the inductor L and the flying capacitor Cfly to store energy.

於第二導通時間T2內，SIBO電源轉換器5操作於特定相位Ph Bc下，第二開關S2、第四開關S4與第八開關S8導通且第一開關S1、第三開關S3、第五開關S5、第六開關S6及第七開關S7不導通，致使第二輸出電壓VON與飛跨電容Cfly同時放電，藉以降低電感電流IL的峰值。 During the second conduction time T2, the SIBO power converter 5 operates in a specific phase Ph Bc, the second switch S2, the fourth switch S4 and the eighth switch S8 are turned on and the first switch S1, the third switch S3 and the fifth switch are turned on. S5, the sixth switch S6 and the seventh switch S7 are not conductive, causing the second output voltage VON and the flying capacitor Cfly to be discharged simultaneously, thereby reducing the peak value of the inductor current IL.

於第三導通時間T3(常數)內，SIBO電源轉換器5操作於第四相位Ph D下，第一開關S1、第三開關S3、第六開關S6及第七開關S7導通且第二開關S2、第四開關S4、第五開關S5及第八開關S8不導通，致使電感L對第一輸出電壓VOP充電且飛跨電容Cfly儲能。 During the third conduction time T3 (constant), the SIBO power converter 5 operates in the fourth phase Ph D, the first switch S1, the third switch S3, the sixth switch S6 and the seventh switch S7 are turned on and the second switch S2 , the fourth switch S4, the fifth switch S5 and the eighth switch S8 are not conductive, causing the inductor L to charge the first output voltage VOP and the flying capacitor Cfly to store energy.

於第四導通時間T4內，SIBO電源轉換器操作於第五相位Ph E下，第二開關S2、第三開關S3、第六開關S6及第七開關S7導通且第 一開關S1、第四開關S4、第五開關S5及第八開關S8不導通，藉以讓第一輸出電壓VOP及第二輸出電壓VON充/放電且飛跨電容Cfly儲能。 During the fourth on-time T4, the SIBO power converter operates in the fifth phase Ph E, the second switch S2, the third switch S3, the sixth switch S6 and the seventh switch S7 are turned on and the The first switch S1, the fourth switch S4, the fifth switch S5 and the eighth switch S8 are non-conductive, so that the first output voltage VOP and the second output voltage VON are charged/discharged and the flying capacitor Cfly stores energy.

於第五導通時間T5內，SIBO電源轉換器操作於第六相位Ph ZC下，第四開關S4、第六開關S6及第七開關S7導通且第一開關S1、第二開關S2、第三開關S3、第五開關S5及第八開關S8不導通，致使電感L及飛跨電容Cfly充電。 During the fifth conduction time T5, the SIBO power converter operates in the sixth phase Ph ZC, the fourth switch S4, the sixth switch S6 and the seventh switch S7 are turned on and the first switch S1, the second switch S2 and the third switch S3, the fifth switch S5 and the eighth switch S8 are not conductive, causing the inductor L and the flying capacitor Cfly to charge.

請參照圖13，圖13繪示當SIBO電源轉換器5依序操作於第一相位Ph A、第四相位Ph D、特定相位Ph Bc及第二相位Ph B下時其第一開關S1至第八開關S8導通與否的時序圖。 Please refer to FIG. 13. FIG. 13 illustrates that when the SIBO power converter 5 operates sequentially in the first phase Ph A, the fourth phase Ph D, the specific phase Ph Bc and the second phase Ph B, the first switch S1 to the second switch S1 are operated in sequence. Timing diagram of eight switches S8 turning on or off.

如圖13所示，於第一導通時間T1內，SIBO電源轉換器5操作於第一相位Ph A下，第一開關S1、第四開關S4、第六開關S6及第七開關S7導通且第二開關S2、第三開關S3、第五開關S5及第八開關S8不導通，藉以讓電感L與飛跨電容Cfly儲能。 As shown in Figure 13, during the first conduction time T1, the SIBO power converter 5 operates in the first phase Ph A, the first switch S1, the fourth switch S4, the sixth switch S6 and the seventh switch S7 are turned on and the The second switch S2, the third switch S3, the fifth switch S5 and the eighth switch S8 are non-conductive, thereby allowing the inductor L and the flying capacitor Cfly to store energy.

於第二導通時間T2內，SIBO電源轉換器5操作於第四相位Ph D下，第一開關S1、第三開關S3、第六開關S6及第七開關S7導通且第二開關S2、第四開關S4、第五開關S5及第八開關S8不導通，致使電感L對第一輸出電壓VOP充電且飛跨電容Cfly儲能。 During the second conduction time T2, the SIBO power converter 5 operates in the fourth phase Ph D, the first switch S1, the third switch S3, the sixth switch S6 and the seventh switch S7 are turned on and the second switch S2 and the fourth switch S7 are turned on. The switch S4, the fifth switch S5 and the eighth switch S8 are not conductive, causing the inductor L to charge the first output voltage VOP and the flying capacitor Cfly to store energy.

於第三導通時間T3(常數)內，SIBO電源轉換器5操作於特定相位Ph Bc下，第二開關S2、第四開關S4與第八開關S8導通且第一開關S1、第三開關S3、第五開關S5、第六開關S6及第七開關S7不導通，致使第二輸出電壓VON與飛跨電容Cfly同時放電，藉以降低電感電流IL的峰值。 During the third conduction time T3 (constant), the SIBO power converter 5 operates under a specific phase Ph Bc, the second switch S2, the fourth switch S4 and the eighth switch S8 are conductive and the first switch S1, the third switch S3, The fifth switch S5, the sixth switch S6 and the seventh switch S7 are not conductive, causing the second output voltage VON and the flying capacitor Cfly to be discharged simultaneously, thereby reducing the peak value of the inductor current IL.

於第四導通時間T4內，SIBO電源轉換器操作於第二相位Ph B下，第二開關S2、第四開關S4、第六開關S6及第七開關S7導通且第一開關S1、第三開關S3、第五開關S5及第八開關S8不導通，致使第二輸出電壓VON放電且飛跨電容Cfly儲能。 During the fourth conduction time T4, the SIBO power converter operates in the second phase Ph B, the second switch S2, the fourth switch S4, the sixth switch S6 and the seventh switch S7 are turned on and the first switch S1 and the third switch S3, the fifth switch S5 and the eighth switch S8 are not conductive, causing the second output voltage VON to be discharged and the flying capacitor Cfly to store energy.

於第五導通時間T5內，SIBO電源轉換器操作於第六相位Ph ZC下，第四開關S4、第六開關S6及第七開關S7導通且第一開關S1、第二開關S2、第三開關S3、第五開關S5及第八開關S8不導通，致使電感L浮接(Floating)及飛跨電容Cfly充電。 During the fifth conduction time T5, the SIBO power converter operates in the sixth phase Ph ZC, the fourth switch S4, the sixth switch S6 and the seventh switch S7 are turned on and the first switch S1, the second switch S2 and the third switch S3, the fifth switch S5 and the eighth switch S8 are not conductive, causing the inductor L to float and the flying capacitor Cfly to charge.

請參照圖14，圖14繪示當SIBO電源轉換器5依序操作於第一相位Ph A、第四相位Ph D、特定相位Ph Bc及第五相位Ph E下時其第一開關S1至第八開關S8導通與否的時序圖。 Please refer to Figure 14. Figure 14 illustrates that when the SIBO power converter 5 operates sequentially in the first phase Ph A, the fourth phase Ph D, the specific phase Ph Bc and the fifth phase Ph E, its first switches S1 to Timing diagram of eight switches S8 turning on or off.

如圖14所示，於第一導通時間T1內，SIBO電源轉換器5操作於第一相位Ph A下，第一開關S1、第四開關S4、第六開關S6及第七開關S7導通且第二開關S2、第三開關S3、第五開關S5及第八開關S8不導通，藉以讓電感L與飛跨電容Cfly儲能。 As shown in Figure 14, during the first conduction time T1, the SIBO power converter 5 operates in the first phase Ph A, the first switch S1, the fourth switch S4, the sixth switch S6 and the seventh switch S7 are turned on and the The second switch S2, the third switch S3, the fifth switch S5 and the eighth switch S8 are non-conductive, thereby allowing the inductor L and the flying capacitor Cfly to store energy.

於第二導通時間T2內，SIBO電源轉換器5操作於第四相位Ph D下，第一開關S1、第三開關S3、第六開關S6及第七開關S7導通且第二開關S2、第四開關S4、第五開關S5及第八開關S8不導通，致使電感L對第一輸出電壓VOP充電且飛跨電容Cfly儲能。 During the second conduction time T2, the SIBO power converter 5 operates in the fourth phase Ph D, the first switch S1, the third switch S3, the sixth switch S6 and the seventh switch S7 are turned on and the second switch S2 and the fourth switch S7 are turned on. The switch S4, the fifth switch S5 and the eighth switch S8 are not conductive, causing the inductor L to charge the first output voltage VOP and the flying capacitor Cfly to store energy.

於第三導通時間T3(常數)內，SIBO電源轉換器5操作於特定相位Ph Bc下，第二開關S2、第四開關S4與第八開關S8導通且第一開關S1、第三開關S3、第五開關S5、第六開關S6及第七開關S7不導通， 致使第二輸出電壓VON與飛跨電容Cfly同時放電而降低電感電流IL的峰值。 During the third conduction time T3 (constant), the SIBO power converter 5 operates under a specific phase Ph Bc, the second switch S2, the fourth switch S4 and the eighth switch S8 are conductive and the first switch S1, the third switch S3, The fifth switch S5, the sixth switch S6 and the seventh switch S7 are not conductive, As a result, the second output voltage VON and the flying capacitor Cfly are simultaneously discharged, thereby reducing the peak value of the inductor current IL.

於第四導通時間T4內，SIBO電源轉換器操作於第五相位Ph E下，第二開關S2、第三開關S3、第六開關S6及第七開關S7導通且第一開關S1、第四開關S4、第五開關S5及第八開關S8不導通，致使第一輸出電壓VOP及第二輸出電壓VON充/放電且飛跨電容Cfly儲能。 During the fourth conduction time T4, the SIBO power converter operates in the fifth phase Ph E, the second switch S2, the third switch S3, the sixth switch S6 and the seventh switch S7 are turned on and the first switch S1 and the fourth switch are turned on. S4, the fifth switch S5 and the eighth switch S8 are not conductive, causing the first output voltage VOP and the second output voltage VON to charge/discharge and the flying capacitor Cfly stores energy.

於第五導通時間T5內，SIBO電源轉換器操作於第六相位Ph ZC下，第四開關S4、第六開關S6及第七開關S7導通且第一開關S1、第二開關S2、第三開關S3、第五開關S5及第八開關S8不導通，致使電感L及飛跨電容Cfly同時放電。 During the fifth conduction time T5, the SIBO power converter operates in the sixth phase Ph ZC, the fourth switch S4, the sixth switch S6 and the seventh switch S7 are turned on and the first switch S1, the second switch S2 and the third switch S3, the fifth switch S5 and the eighth switch S8 are not conductive, causing the inductor L and the flying capacitor Cfly to discharge at the same time.

相較於先前技術，本發明所揭露的SIBO電源轉換器係透過在特定相位下第一輸出電壓與第二輸出電壓同時放電或第二輸出電壓與飛跨電容同時放電來使電感電流的峰值下降，連帶使得系統導通功耗變小，藉以有效提升SIBO電源轉換器的重載效率。 Compared with the prior art, the SIBO power converter disclosed in the present invention reduces the peak value of the inductor current by simultaneously discharging the first output voltage and the second output voltage or the second output voltage and the flying capacitor at a specific phase. , which also makes the system conduction power consumption smaller, thereby effectively improving the heavy-load efficiency of the SIBO power converter.

1:SIBO電源轉換器 1:SIBO power converter

L:電感 L: inductance

IL:電感電流 IL: inductor current

S1~S5:第一開關~第五開關 S1~S5: first switch~fifth switch

COP:第一電容 COP: first capacitor

CON:第二電容 CON: second capacitor

VOP:第一輸出電壓 VOP: first output voltage

VON:第二輸出電壓 VON: second output voltage

LXN:第一端 LXN: first end

LXP:第二端 LXP: Second end

GND:接地端 GND: ground terminal

Claims (20)

一種單電感雙極性輸出(Single Inductor Bipolar Outputs，SIBO)電源轉換器，包括： 一電感，具有一第一端及一第二端且一電感電流流經該電感； 一第一開關，耦接於一輸入電壓與該第一端之間； 一第二開關，耦接於該第一端與一第二輸出電壓之間； 一第三開關，耦接於該第二端與一第一輸出電壓； 一第四開關，耦接於該第二端與一接地端之間；以及 一第五開關，耦接於該第一端與該接地端之間； 其中，當該SIBO電源轉換器操作於一特定相位下時，該第二開關與該第三開關導通且該第一開關、該第四開關及該第五開關不導通，致使該第一輸出電壓與該第二輸出電壓同時放電而降低該電感電流的峰值。 A single inductor bipolar output (SIBO) power converter, including: An inductor having a first end and a second end and an inductor current flowing through the inductor; a first switch coupled between an input voltage and the first terminal; a second switch coupled between the first terminal and a second output voltage; a third switch coupled between the second terminal and a first output voltage; a fourth switch coupled between the second terminal and a ground terminal; and a fifth switch coupled between the first terminal and the ground terminal; Wherein, when the SIBO power converter operates in a specific phase, the second switch and the third switch are turned on and the first switch, the fourth switch and the fifth switch are not turned on, resulting in the first output voltage Discharging simultaneously with the second output voltage reduces the peak value of the inductor current. 如請求項1所述的SIBO電源轉換器，還包括彼此串接的一第一電容及一第二電容，該第一電容耦接於該第一輸出電壓與該接地端之間且該第二電容耦接於該接地端與該第二輸出電壓之間。The SIBO power converter of claim 1 further includes a first capacitor and a second capacitor connected in series with each other, the first capacitor is coupled between the first output voltage and the ground terminal, and the second capacitor The capacitor is coupled between the ground terminal and the second output voltage. 如請求項1所述的SIBO電源轉換器，其中當該SIBO電源轉換器操作於一第一相位下時，該第一開關及該第四開關導通且該第二開關、該第三開關及該第五開關不導通，以進行對電感充電。The SIBO power converter as claimed in claim 1, wherein when the SIBO power converter operates in a first phase, the first switch and the fourth switch are turned on and the second switch, the third switch and the The fifth switch is not conductive to charge the inductor. 如請求項1所述的SIBO電源轉換器，其中當該SIBO電源轉換器操作於一第二相位下時，該第二開關及該第四開關導通且該第一開關、該第三開關及該第五開關不導通，致使該第二輸出電壓放電。The SIBO power converter as claimed in claim 1, wherein when the SIBO power converter operates in a second phase, the second switch and the fourth switch are turned on and the first switch, the third switch and the The fifth switch is non-conductive, causing the second output voltage to discharge. 如請求項4所述的SIBO電源轉換器，其中該SIBO電源轉換器依序操作於該特定相位及該第二相位。The SIBO power converter of claim 4, wherein the SIBO power converter operates in the specific phase and the second phase in sequence. 如請求項1所述的SIBO電源轉換器，其中當該SIBO電源轉換器操作於一第三相位下時，該第三開關及該第五開關導通且該第一開關、該第二開關及該第四開關不導通。The SIBO power converter as claimed in claim 1, wherein when the SIBO power converter operates in a third phase, the third switch and the fifth switch are turned on and the first switch, the second switch and the The fourth switch is not conducting. 如請求項6所述的SIBO電源轉換器，其中該SIBO電源轉換器依序操作於該特定相位及該第三相位。The SIBO power converter of claim 6, wherein the SIBO power converter operates in the specific phase and the third phase in sequence. 如請求項1所述的SIBO電源轉換器，其中當該SIBO電源轉換器操作於一第四相位下時，該第一開關及該第三開關導通且該第二開關、該第四開關及該第五開關不導通，致使該第一輸出電壓放電。The SIBO power converter as claimed in claim 1, wherein when the SIBO power converter operates in a fourth phase, the first switch and the third switch are turned on and the second switch, the fourth switch and the The fifth switch is non-conductive, causing the first output voltage to discharge. 如請求項8所述的SIBO電源轉換器，其中該SIBO電源轉換器係依序操作於該第四相位及該特定相位。The SIBO power converter of claim 8, wherein the SIBO power converter operates in the fourth phase and the specific phase in sequence. 如請求項1所述的SIBO電源轉換器，其中當該SIBO電源轉換器操作於一第五相位下時，該第四開關導通且該第一開關、該第二開關、該第三開關及該第五開關不導通。The SIBO power converter as claimed in claim 1, wherein when the SIBO power converter operates in a fifth phase, the fourth switch is turned on and the first switch, the second switch, the third switch and the The fifth switch is not conducting. 如請求項1所述的SIBO電源轉換器，其中當該SIBO電源轉換器操作於一第六相位下時，該第五開關導通且該第一開關、該第二開關、該第三開關及該第四開關不導通。The SIBO power converter as claimed in claim 1, wherein when the SIBO power converter operates in a sixth phase, the fifth switch is turned on and the first switch, the second switch, the third switch and the The fourth switch is not conducting. 一種單電感雙極性輸出(SIBO)電源轉換器，包括： 一電感，具有一第一端及一第二端且一電感電流流經該電感； 一第一開關，耦接於一輸入電壓與該第一端之間； 一第二開關，耦接於該第一端與一第二輸出電壓之間； 一第三開關，耦接於該第二端與一第一輸出電壓之間； 一充電泵，包括一飛跨電容、一第四開關、一第六開關、一第七開關及一第八開關，該第四開關與該第七開關串接於該第二端與一接地端之間且該第六開關與該第八開關串接於該輸入電壓與該接地端之間，該飛跨電容之一端耦接至該第六開關與該第八開關之間且該飛跨電容之另一端耦接至該第四開關與該第七開關之間；以及 一第五開關，耦接於該第一端與該接地端之間； 其中，當該SIBO電源轉換器操作於一特定相位下時，該第二開關、該第四開關與該第八開關導通且該第一開關、該第三開關、該第五開關、該第六開關及該第七開關不導通，致使該第二輸出電壓因電感與該飛跨電容同時放電而降低該電感電流的峰值。 A single inductor bipolar output (SIBO) power converter including: An inductor having a first end and a second end and an inductor current flowing through the inductor; a first switch coupled between an input voltage and the first terminal; a second switch coupled between the first terminal and a second output voltage; a third switch coupled between the second terminal and a first output voltage; A charge pump includes a flying capacitor, a fourth switch, a sixth switch, a seventh switch and an eighth switch. The fourth switch and the seventh switch are connected in series to the second terminal and a ground terminal. between the sixth switch and the eighth switch in series between the input voltage and the ground terminal, one end of the flying capacitor is coupled between the sixth switch and the eighth switch, and the flying capacitor The other end is coupled between the fourth switch and the seventh switch; and a fifth switch coupled between the first terminal and the ground terminal; Wherein, when the SIBO power converter operates in a specific phase, the second switch, the fourth switch and the eighth switch are turned on and the first switch, the third switch, the fifth switch, the sixth switch The switch and the seventh switch are not conductive, causing the second output voltage to reduce the peak value of the inductor current due to simultaneous discharge of the inductor and the flying capacitor. 如請求項12所述的SIBO電源轉換器，還包括彼此串接的一第一電容及一第二電容，該第一電容耦接於該第一輸出電壓與該接地端之間且該第二電容耦接於該接地端與該第二輸出電壓之間。The SIBO power converter of claim 12 further includes a first capacitor and a second capacitor connected in series with each other, the first capacitor is coupled between the first output voltage and the ground terminal, and the second capacitor is The capacitor is coupled between the ground terminal and the second output voltage. 如請求項12所述的SIBO電源轉換器，其中當該SIBO電源轉換器操作於一第一相位下時，該第一開關、該第四開關、該第六開關及該第七開關導通且該第二開關、該第三開關、該第五開關及該第八開關不導通，使得該電感與該飛跨電容儲能。The SIBO power converter of claim 12, wherein when the SIBO power converter operates in a first phase, the first switch, the fourth switch, the sixth switch and the seventh switch are turned on and the The second switch, the third switch, the fifth switch and the eighth switch are not conductive, so that the inductor and the flying capacitor store energy. 如請求項14所述的SIBO電源轉換器，其中該SIBO電源轉換器係依序操作於該第一相位及該特定相位。The SIBO power converter of claim 14, wherein the SIBO power converter operates in the first phase and the specific phase in sequence. 如請求項12所述的SIBO電源轉換器，其中當該SIBO電源轉換器操作於一第二相位下時，該第二開關、該第四開關、該第六開關及該第七開關導通且該第一開關、該第三開關、該第五開關及該第八開關不導通，致使該第二輸出電壓放電且該飛跨電容儲能。The SIBO power converter of claim 12, wherein when the SIBO power converter operates in a second phase, the second switch, the fourth switch, the sixth switch and the seventh switch are turned on and the The first switch, the third switch, the fifth switch and the eighth switch are not conductive, causing the second output voltage to discharge and the flying capacitor to store energy. 如請求項12所述的SIBO電源轉換器，其中當該SIBO電源轉換器操作於一第三相位下時，該第三開關、該第五開關、該第六開關及該第七開關導通且該第一開關、該第二開關、該第四開關及該第八開關不導通，致使該電感對該第一輸出電壓充電且該飛跨電容儲能。The SIBO power converter of claim 12, wherein when the SIBO power converter operates in a third phase, the third switch, the fifth switch, the sixth switch and the seventh switch are turned on and the The first switch, the second switch, the fourth switch and the eighth switch are not conductive, causing the inductor to charge the first output voltage and the flying capacitor to store energy. 如請求項12所述的SIBO電源轉換器，其中當該SIBO電源轉換器操作於一第四相位下時，該第一開關、該第三開關、該第六開關及該第七開關導通且該第二開關、該第四開關、該第五開關及該第八開關不導通，致使該電感對該第一輸出電壓充電且該飛跨電容儲能。The SIBO power converter of claim 12, wherein when the SIBO power converter operates in a fourth phase, the first switch, the third switch, the sixth switch and the seventh switch are turned on and the The second switch, the fourth switch, the fifth switch and the eighth switch are not conductive, causing the inductor to charge the first output voltage and the flying capacitor to store energy. 如請求項18所述的SIBO電源轉換器，其中該SIBO電源轉換器係依序操作於該第四相位及該特定相位。The SIBO power converter of claim 18, wherein the SIBO power converter operates in the fourth phase and the specific phase sequentially. 如請求項12所述的SIBO電源轉換器，其中當該SIBO電源轉換器操作於一第五相位下時，該第二開關、該第三開關、該第六開關及該第七開關導通且該第一開關、該第四開關、該第五開關及該第八開關不導通，致使該第一輸出電壓及該第二輸出電壓充/放電且該飛跨電容儲能。The SIBO power converter of claim 12, wherein when the SIBO power converter operates in a fifth phase, the second switch, the third switch, the sixth switch and the seventh switch are turned on and the The first switch, the fourth switch, the fifth switch and the eighth switch are not conductive, causing the first output voltage and the second output voltage to charge/discharge and the flying capacitor stores energy.
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