CN101884159B - Multiple-voltage power supply apparatus - Google Patents
Multiple-voltage power supply apparatus Download PDFInfo
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- CN101884159B CN101884159B CN2008801190716A CN200880119071A CN101884159B CN 101884159 B CN101884159 B CN 101884159B CN 2008801190716 A CN2008801190716 A CN 2008801190716A CN 200880119071 A CN200880119071 A CN 200880119071A CN 101884159 B CN101884159 B CN 101884159B
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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
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
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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
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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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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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
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
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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
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
- H02M3/071—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps adapted to generate a negative voltage output from a positive voltage source
Abstract
Provided is a multiple-voltage power supply apparatus which generates multiple power source voltages including a positive output voltage and a negative output voltage by using one input voltage. In the multiple-voltage power supply apparatus, multiple output voltages can be obtained irrespective of the input voltage, and an operating range in the input voltage can be easily widened. In addition, since the regulator is used to generate the positive output voltage, it is possible to obtain a voltage invulnerable to a switching noise.
Description
Technical field
The present invention relates to a kind of supply unit, relate in particular to a kind of multiple-voltage power supply apparatus, it produces the multiple supply voltage that comprises positive output voltage and negative output voltage by utilizing an input voltage.
Background technology
Traditionally, a lot of electronic installations are arranged, wherein Yu Ding positive output voltage source V po and predetermined negative output voltage source Vno are different from positive voltage source Vpo, are respectively required in this charge coupled device (CCD).
Mode according to this, under the situation of positive output voltage source V po that needs to be higher than input voltage respectively and negative output voltage source Vno, use is by the switched voltage circuit that improves or reduce input voltage with coil, thus the predetermined positive output voltage that generation converts from supply voltage.
Traditionally, has the Switching power unit of coil as the DC-DC transducer that produces the voltage that is different from supply voltage.For rising type Switching power unit, switch open/close the electric current that flows through coil, thus obtain high voltage from the DC input voltage, then by diode and electric capacity rectification and level and smooth this high voltage, thereby obtain rising type output voltage.
Fig. 1 represents the structure of traditional multiple-voltage power supply apparatus.
With reference to figure 1, traditional multiple-voltage power supply apparatus comprises that rising type Switching power circuit 10, negative output voltage initialization circuit 20 and negative output voltage produce circuit 30.
In rising type Switching power circuit 10, the nmos pass transistor Q1 that carries out handover operation between power source voltage Vcc and earthed voltage GND is connected serially to inductance L 1.The voltage output of series connection point A is as the positive output voltage Vpo of diode D1 and capacitor C 1.
Input to control circuit Cont corresponding to the detection voltage Vdet of positive output voltage Vpo with from the reference voltage Vref of reference voltage source B 1.Control circuit Cont produces the switching signal that is used for control switch Q1, thus balanced voltage Vdet and the reference voltage Vref of detecting.
By rising type Switching power circuit 10, positive output voltage Vpo equals by improving the predetermined voltage (=Vref x (R1+R2)/R2) that power source voltage Vcc obtained through control.The voltage of tie point A becomes 0 or positive output voltage Vpo, with the unlatching of responding to switch Q1 or close.
In negative output voltage initialization circuit 20, Zener diode ZD1 and ZD2 connect between positive output voltage node Vpo and ground connection GND, thereby obtain predetermined voltage drop Vz.The negative output voltage setting voltage (Vpo-Vz) that is lower than positive output voltage Vpo predetermined voltage Vz is exported from the tie point B between Zener diode and the constant current supply 120.
Negative output voltage produces circuit 30 and produces negative output voltage Vno according to input negative output voltage setting voltage (Vpo-Vz) and switching signal.Negative output voltage setting voltage (Vpo-Vz) is supplied to negative output voltage by buffer BUF and produces circuit 30.Negative output voltage setting voltage (Vpo-Vz) is regulated by the Zener diode of selecting proper number, thereby produces required negative output voltage Vno.
Fig. 2 represents the another kind of structure of traditional multiple-voltage power supply apparatus.
With reference to figure 2, traditional multiple-voltage power supply apparatus comprises that decline type Switching power circuit 10A, negative output voltage initialization circuit 20A and negative output voltage produce circuit 30A.
Decline type Switching power circuit 10A reduces input supply voltage Vcc, with the positive output voltage Vpo of output reduction.
In decline type Switching power circuit 10A, coil L1A opens by the first switch Q1A, promptly is that according to power source voltage Vcc and capacitor C 1A, the PMOS transistor is connected to the output of coil L1A.The charging voltage of capacitor C 1A exports positive output voltage Vpo to.The first switch Q1A, i.e. PMOS transistor and second switch Q2A, promptly nmos pass transistor is complementary switches.
The similar of represented positive output voltage detecting circuit 11 among the structure that positive output voltage detecting circuit 11A has and Fig. 1.Control circuit ContA exports complementary switching signal by the first switch Q1A and second switch Q2A.Control circuit Cont represented among other structures of control circuit ContA and operation and Fig. 1 is similar.
By decline type Switching power circuit 10A, positive output voltage Vpo equals by reducing the predetermined voltage (=Vrefx (R1+R2)/R2) that power source voltage Vcc obtained through control.The voltage of tie point A becomes power source voltage Vcc or 0, with the unlatching that responds the first switch Q1A or close.
In negative output voltage initialization circuit 20A, Zener diode ZD1 and ZD2 connect between power source voltage Vcc and ground connection GND, fall Vz thereby obtain predetermined voltage.The negative output voltage setting voltage (Vcc-Vz) that is lower than power source voltage Vcc predetermined voltage Vz is exported from the tie point B between Zener diode and the constant current supply 120.
Represented negative output voltage produces the similar of circuit 30 among the structure that negative output voltage generation circuit 30A has and Fig. 1.Negative output voltage produces circuit 30A and produces negative output voltage Vno according to input negative output voltage setting voltage (Vcc-Vz) and switching signal.Negative output voltage setting voltage (Vcc-Vz) is supplied to negative output voltage by buffer BUF and produces circuit 30A.Negative output voltage setting voltage (Vcc-Vz) is regulated by the Zener diode of selecting proper number, thereby can produce required negative output voltage Vno.
As a result, the level that has of negative output voltage Vno equals the predetermined voltage Vz that negative output voltage produces circuit 30A.
Described with reference to figure 1 and Fig. 2, in multiple-voltage power supply apparatus, use rising type or decline type Switching power circuit, thereby from input supply voltage Vcc, produce positive output voltage Vpo, then by utilizing the switching signal that produces to produce negative output voltage Vno.
In addition, the predetermined voltage Vz that negative output voltage is produced in the circuit to be produced by buffer is supplied to negative output voltage and produces circuit and produce negative output voltage Vno.
Yet, in traditional supply unit, by utilizing the switching signal that in the circuit that produces positive output voltage Vpo, is produced to produce negative output voltage Vno.Therefore, whether Vpo is higher or lower than power source voltage Vcc according to positive output voltage, and producing the circuit of positive output voltage Vpo and the circuit of generation negative output voltage Vno needs idioadaptation.As a result, traditional supply unit is unsuitable for having the structure of power source voltage Vcc inner width opereating specification.
In addition, because not directly monitoring of negative output voltage Vno, so need be used to produce the circuit of positive output voltage Vpo, producing a voltage is used to utilize predetermined voltage to fall to produce negative output voltage Vno, buffer voltagc, and receive the input switching signal, thus produce negative output voltage Vno.Therefore, be difficult to keep accurate, stable negative output voltage Vno.
In addition, produce the reference voltage that Vz falls in predetermined voltage because power source voltage Vcc or positive output voltage Vpo are used as, its switching noise is passed to negative output voltage Vno.
Therefore, positive output voltage Vpo and the negative output voltage Vno that is produced in the traditional supply unit is unsuitable for the power supply noise devices sensitive.Therefore, in the device that additionally needs this switching noise of removal, have problems.
Summary of the invention
(technical problem that institute's desire solves)
The invention provides a kind of multiple-voltage power supply apparatus,, be suitable for, and in input voltage, have wide opereating specification the power supply noise devices sensitive no matter it can utilize the same circuits of voltage relationship between input voltage and the output voltage.
(technological means of dealing with problems)
According to an aspect of of the present present invention, provide a kind of multiple-voltage power supply apparatus, comprising: decline type Switching power unit, it has the reference voltage Vint that is lower than input voltage vin by utilizing input voltage to produce; First adjuster, it produces the first output voltage V out1 by the level of regulating reference voltage; Rising type Switching power unit, it produces up voltage Vx by increasing reference voltage; The positive output voltage generator, up voltage produces positive output voltage Vpo and enable signal En by utilizing upward for it; And charge pump conversion hysteria power subsystem, it goes up up voltage by utilization and first output voltage produces negative output voltage, with the response enable signal.
According to another aspect of the present invention, provide a kind of multiple-voltage power supply apparatus, comprising: decline type Switching power unit, it is by utilizing input voltage to produce switching signal Sw and having the reference voltage Vint that is lower than input voltage vin; First adjuster, it produces the first output voltage V out1 by the level of regulating reference voltage; Charge pump rising type power subsystem, it is by utilizing switching signal and input voltage to produce up voltage Vx; The positive output voltage generator, up voltage produces positive output voltage Vpo and enable signal En by utilizing upward for it; And charge pump conversion hysteria power subsystem, it is by utilizing the input voltage and first output voltage to produce negative output voltage Vno, with the response enable signal.
Provide a kind of multiple-voltage power supply apparatus more on the one hand according to of the present invention, comprising: decline type Switching power unit, it is by the reference voltage Vint that utilizes input voltage to produce switching signal Sw and have the level that is lower than input voltage vin; First adjuster, it produces the first output voltage V out1 charge pump rising type power subsystem by the level of regulating reference voltage, and it is by utilizing switching signal and input voltage to produce up voltage Vx; The positive output voltage generator, up voltage produces positive output voltage Vpo and enable signal En by utilizing upward for it; And charge pump conversion hysteria power subsystem, it goes up up voltage by utilization and first output voltage produces negative output voltage Vno, with the response enable signal.
According to another aspect of the present invention, provide multiple-voltage power supply apparatus, comprising: decline type Switching power unit, it has the reference voltage Vint that level is lower than input voltage vin by utilizing input voltage to produce; First adjuster, it produces the first output voltage V out1 by the level of regulating reference voltage; Lifting Switching power unit, it produces up voltage Vx by improving input voltage; The positive output voltage generator, up voltage produces positive output voltage Vpo and enable signal En by utilizing upward for it; And charge pump conversion hysteria power subsystem, it is by utilizing the input voltage and first output voltage to produce negative output voltage Vno, with the response enable signal.
According to another aspect of the present invention, provide multiple-voltage power supply apparatus, comprising: decline type Switching power unit, it has the reference voltage Vint that level is lower than input voltage vin by utilizing input voltage to produce; First adjuster, it produces the first output voltage V out1 by the level of regulating reference voltage; Lifting Switching power unit, it is by utilizing input voltage to produce up voltage Vx; Second voltage regulator, up voltage produces positive output voltage Vpo and enable signal En by utilizing upward for it; And charge pump conversion hysteria power subsystem, it goes up up voltage by utilization and first output voltage produces negative output voltage Vno, with the response enable signal.
(effect)
According in the multiple-voltage power supply apparatus of the present invention, input voltage is converted to after the reference voltage, utilizes reference voltage with generation positive output voltage and negative output voltage, thereby no matter can utilize the same circuits structure of voltage relationship between input voltage and the output voltage.Therefore, can relax opereating specification in the input voltage easily.
In addition, according in the multiple-voltage power supply apparatus of the present invention, monitor negative output voltage so that produce negative output voltage, thereby can obtain accurate negative output voltage.
In addition, owing to utilize adjuster producing positive output voltage, so can obtain the voltage that not influenced by switching noise.Therefore, multiple-voltage power supply apparatus is applicable to the power supply noise devices sensitive.
Description of drawings
Fig. 1 represents the structure of traditional multiple-voltage power supply apparatus.
Fig. 2 represents the another kind of structure of traditional multiple-voltage power supply apparatus.
Fig. 3 represents the structure according to the multiple-voltage power supply apparatus of the embodiment of the invention.
Fig. 4 is a circuit diagram, the decline type Switching power unit of represented multiple-voltage power supply apparatus according to the embodiment of the invention in the presentation graphs 3.
Fig. 5 is a circuit diagram, the rising type Switching power unit of represented multiple-voltage power supply apparatus according to the embodiment of the invention in the presentation graphs 3.
Fig. 6 is a circuit diagram, the charge pump conversion hysteria power subsystem of represented multiple-voltage power supply apparatus according to the embodiment of the invention in the presentation graphs 3.
Fig. 7 represents the structure according to the multiple-voltage power supply apparatus of another embodiment of the present invention.
Fig. 8 is a circuit diagram, the represented multiple-voltage power supply apparatus according to the embodiment of the invention in the presentation graphs 7.
Fig. 9 represents the structure according to the multiple-voltage power supply apparatus of another embodiment of the present invention.
Figure 10 is a circuit diagram, the represented multiple-voltage power supply apparatus according to the embodiment of the invention in the presentation graphs 9.
Figure 11 represents the structure according to the multiple-voltage power supply apparatus of another embodiment of the present invention.
Figure 12 represents the structure according to the multiple-voltage power supply apparatus of another embodiment of the present invention.
Figure 13 is a circuit diagram, the lifting Switching power unit of represented multiple-voltage power supply apparatus according to the embodiment of the invention among expression Figure 11 and Figure 12.
Embodiment
Hereinafter, the present invention will be with reference to the appended graphic exemplary embodiment of the present invention of describing in detail.In order preferably to understand the description that the present invention will omit known technology and structure.
Fig. 3 represents the structure according to the multiple-voltage power supply apparatus of the embodiment of the invention.
With reference to figure 3, supply unit comprises decline type Switching power unit 310, first adjuster 320, rising type Switching power unit 330, positive output voltage generator 340 and charge pump conversion hysteria power subsystem 350.
Decline type Switching power unit 310 has the reference voltage Vint that level is lower than input voltage vin by utilizing input voltage to produce.
First adjuster 320 by the switching noise of the reference voltage Vint of the output of removing decline type Switching power unit 310 to produce the first output voltage V out1.One or more first adjusters 320 are provided, thereby can obtain the multiple output voltage V out1, the Vout2... that are wanted easily.
Rising type Switching power unit 330 is by utilizing reference voltage Vint to produce up voltage Vx.
Positive output voltage generator 340 comprises second adjuster 341 and enables square 342.Second adjuster 341 produces positive output voltage Vpo by utilize going up up voltage Vx, and enables square 342 and detect the generation of positive output voltage Vpo to produce enable signal En.
Charge pump conversion hysteria power subsystem 350 goes up up voltage Vx by utilization and the first output voltage V out1 produces negative output voltage Vno, with response enable signal En.
Mean in decline type Switching power unit 310, to have level and be lower than the reference voltage Vint of input voltage vin by utilizing input voltage vin to produce.Positive output voltage Vpo, negative output voltage Vno and the multiple first output voltage V out1 can obtain easily.
Fig. 4 is a circuit diagram, the decline type Switching power unit 310 of represented multiple-voltage power supply apparatus according to the embodiment of the invention in the presentation graphs 3.
With reference to figure 4, decline type Switching power unit 310 has the reference voltage Vint that level is lower than input voltage vin by utilizing input voltage vin to produce.
More specifically, decline type Switching power unit 310 comprises the first switch Q1, its first end loads input voltage vin, the first diode D1, its first end is connected to second end and its second end ground connection of the first switch Q1, first inductance L 1, its first end is commonly connected to second end of the first switch Q1 and first end of the first diode D1, first capacitor C 1, its first end is connected to second end and its second end ground connection of first inductance L 1, the first feedback voltage generator 311, it is by utilizing reference voltage Vint to produce first feedback voltage Vfb 1, and first controller 312, it is by first control signal of utilizing first feedback voltage Vfb 1 to produce to be used to control On/Off first switch.
Decline type Switching power unit 310 has the reference voltage Vint that level is lower than input voltage vin by utilizing input voltage vin to produce.
In decline type Switching power unit 310, first inductance L 1 is promptly opened according to the transistor of input voltage vin through the first switch Q1, and first capacitor C 1 is connected to the output of first inductance L 1.The charging voltage of first capacitor C 1 exports reference voltage Vint to.
The first feedback voltage generator 311 comprises first resistance R 1, and its first end is connected to the output node and second resistance R 2 of reference voltage, and its first end is connected to second end and its second end ground connection of the first transistor.First feedback voltage Vfb 1 is from the common node output of first resistance R 1 and second resistance R 2.
Fig. 5 is a circuit diagram, the rising type Switching power unit 330 of represented multiple-voltage power supply apparatus according to the embodiment of the invention in the presentation graphs 3.
With reference to figure 5, rising type Switching power unit 330 comprises second inductance L 2, its first end loads reference voltage, second switch Q2, its first end is connected to second end and its second end ground connection of second inductance L 2, the second diode D2, its first end is commonly connected to second end of second inductance L 2 and first end of second switch Q2, second capacitor C 2, its first end is connected to second end and its second end ground connection of the second diode D2, the second feedback voltage generator 331, up voltage produces second feedback voltage Vfb 2 by utilizing upward for it, and second controller 332, it is by second control signal of utilizing second feedback voltage to produce to be used to control On/Off second switch Q2.
In rising type Switching power unit 330, second inductance L 2 is promptly opened according to the transistor of reference voltage Vint through second switch Q2, and second capacitor C 2 is connected to the outlet terminal of second inductance L 2.The charging voltage of second capacitor C 2 exports up voltage Vx to.
The second feedback voltage generator 331 comprises the 3rd resistance R 3, and its first terminal is connected to the output node and the 4th resistance R 4 of up voltage, and its first end is connected to second end and its second end ground connection of the 3rd resistance R 3.Second feedback voltage Vfb 2 is from the common node output of the 3rd resistance R 3 and the 4th resistance R 4.
Fig. 6 is a circuit diagram, the charge pump conversion hysteria power subsystem 350 of represented multiple-voltage power supply apparatus according to the embodiment of the invention in the presentation graphs 3.
With reference to figure 6, charge pump conversion hysteria power subsystem comprises driver 353, it is operated between last up voltage and earthed voltage, and its first input end load enable signal En, the 3rd capacitor C 3, its first end is connected to output end of driver, the 3rd diode D3, its first end is connected to second end and its second end ground connection of the 3rd capacitor C 3, the 4th diode D4, its first end is commonly connected to second end and first end of the 3rd diode D3 and the output node that its second end is connected to negative output voltage Vno of the 3rd capacitor C 3, the 4th capacitor C 4, its first end is connected to output node and its second end ground connection of negative output voltage Vno, the 3rd feedback voltage generator 351, it is by utilizing negative output voltage Vno to produce the 3rd feedback voltage Vfb 3, and the 3rd controller 352, it is by second input that utilizes the 3rd feedback voltage Vfb 3 to produce the 3rd control signal and the 3rd control signal is loaded on driver 353.
Charge pump conversion hysteria power subsystem 350 goes up up voltage Vx by utilization and the first output voltage V out1 produces negative output voltage Vno, with response enable signal En.
Charge pump conversion hysteria power subsystem 350 and the combination of charge pump transducer.The 3rd feedback voltage generator 351 is not providing to the situation of charge pump conversion hysteria power subsystem 350, and the last up voltage Vx conversion that is used as driver 353 power supplys is to be output as negative output voltage Vno.
Therefore, the negative output voltage Vno that wants in order to obtain, the 3rd feedback voltage generator 351 and 5 combinations of the 5th resistance R, its first end is connected to the output node of negative output voltage Vno, and the 6th resistance R 6, second end and its second end that its first terminal is connected to the 5th resistance R 5 are connected to the first output voltage V out1.
The 3rd feedback voltage Vfb of exporting from the common node of the 5th resistance R 5 and the 6th resistance R 63 inputs to the 3rd controller 352.The 3rd controller 352 is by utilizing the 3rd feedback voltage Vfb 3 to produce the 3rd control signal Con3 and the 3rd control signal Con3 being loaded on the input of driver 353.
The negative output voltage Vno that is wanted can obtain by regulating the 3rd feedback voltage Vfb 3.Therefore, the negative output voltage Vno that is wanted can regulate easily by changing the 5th resistance R 5, the 6th resistance R 6 and the first output voltage V out1.
Fig. 7 represents the structure according to the multiple-voltage power supply apparatus of another embodiment of the present invention.
Fig. 8 is a circuit diagram, the represented multiple-voltage power supply apparatus according to the embodiment of the invention in the presentation graphs 7.
With reference to figure 7 and Fig. 8, multiple-voltage power supply apparatus comprises decline type Switching power unit 710, first adjuster 720, charge pump rising type power subsystem 730, positive output voltage generator 740 and charge pump conversion hysteria power subsystem 750.
As previously discussed, decline type Switching power unit 710 has the reference voltage Vint that level is lower than input voltage vin by utilizing input voltage vin to produce.
Charge pump rising type power subsystem 730 comprises the 5th diode D5, its first end is connected to input voltage, the 5th capacitor C 5, its first end is connected to the switching signal Sw of decline type Switching power unit 710, and its second end is connected to second end, the 6th diode D6 of the 5th diode D5, its first end is commonly connected to second end and the 6th capacitor C 6 of second end and the 5th diode D5 of the 5th capacitor C 5, and its first end is connected to second end and its second end ground connection of the 6th diode D6.Last up voltage is from the common node output of first end of second end of the 6th diode D6 and the 6th capacitor C 6.
In charge pump rising type power subsystem 730, the reference voltage that the 5th capacitor C 5 is charged comes to 6 chargings of the 6th capacitor C, to produce the last up voltage Vx that rises from input voltage vin according to the switching signal Sw that is produced in the decline type Switching power unit 710.
With reference to figure 3, positive output voltage generator 740 comprises second adjuster 741 and enables square 742.Up voltage Vx produces positive output voltage Vpo to second adjuster 741 by utilizing upward, and enables the generation that square 742 detects positive output voltage Vpo, to produce enable signal En.
Charge pump conversion hysteria power subsystem 750 is according to the aforesaid operations principle, by utilizing the reference voltage Vint and the first output voltage V out1 to produce negative output voltage Vno, with response enable signal En.
Fig. 9 represents the structure according to the multiple-voltage power supply apparatus of another embodiment of the present invention.
Figure 10 is a circuit diagram, the represented multiple-voltage power supply apparatus according to the embodiment of the invention in the presentation graphs 9.
With reference to figure 9 and Figure 10, be similar to multiple-voltage power supply apparatus represented among Fig. 7, multiple-voltage power supply apparatus comprises decline type Switching power unit 710, first adjuster 720, charge pump rising type power subsystem 730, positive output voltage generator 740 and charge pump conversion hysteria power subsystem 750.
The structure of decline type Switching power unit 710, first adjuster 720, charge pump rising type power subsystem 730 and positive output voltage generator 740 and operating principle are identical with content described in Fig. 7 and Fig. 8.
Yet, the charge pump conversion hysteria power subsystem that is different from multiple-voltage power supply apparatus represented among Fig. 7, it uses the reference voltage Vint and the first output voltage V out1, the charge pump conversion hysteria power subsystem 750 of represented multiple-voltage power supply apparatus is by utilizing the last up voltage Vx and the first output voltage V out1 to produce negative output voltage Vno, with response enable signal En among Fig. 9.
Figure 11 represents the structure according to the multiple-voltage power supply apparatus of another embodiment of the present invention.
With reference to Figure 11, multiple-voltage power supply apparatus 700 comprises decline type Switching power unit 710, first adjuster 720, lifting Switching power unit 730, positive output voltage generator 740 and charge pump conversion hysteria power subsystem 750.
The structure of decline type Switching power unit 710, first adjuster 720, positive output voltage generator 740 and charging rising type power subsystem 750 and operating principle are identical with content described in Fig. 7 and Fig. 8.
Yet, being different from multiple-voltage power supply apparatus represented among Fig. 7, it utilizes charge pump rising type power subsystem to increase input voltage vin, and represented multiple-voltage power supply apparatus utilizes lifting type Switching power unit 730 among Figure 11.
Figure 13 is a circuit diagram, the lifting Switching power unit 730 of represented multiple-voltage power supply apparatus according to the embodiment of the invention among expression Figure 11 and Figure 12.
With reference to Figure 13, lifting Switching power unit 730 comprises the 3rd inductance L 3, its first end loads input voltage vin, the 3rd switch Q3, its first end connects second end and its second end ground connection of the 3rd inductance L 3, the 7th capacitor C 7, its first end is commonly connected to second end of the 3rd inductance L 3 and first end of the 3rd switch Q3, the 8th capacitor C 8, its first end is connected in parallel to first end of the 7th capacitor C 7, the 9th resistance R 9, its first end is connected serially to second end of the 8th capacitor C 8 and second end that its second end is connected in parallel to the 7th capacitor C 7, the 7th diode D7, its first end is commonly connected to second end of the 7th capacitor C 7 and second end and its second end ground connection of the 9th resistance R 9, the 4th inductance L 4, its first end is commonly connected to second end and second end of the 9th resistance R 9 and the output node that its second end is connected to up voltage of the 7th capacitor C 7, the 4th feedback voltage generator 731, up voltage produces the 4th feedback voltage Vfb 4 by utilizing upward for it, and the 4th controller 732, it controls the On/Off of the 3rd switch to produce the 4th control signal by utilizing the 4th feedback voltage Vfb 4 to be used to.
Because lifting Switching power unit 730 can obtain stable last up voltage.
Figure 12 represents the structure according to the multiple-voltage power supply apparatus of another embodiment of the present invention.
With reference to Figure 12, be similar to multiple-voltage power supply apparatus represented among Figure 11, this multiple-voltage power supply apparatus 700 comprises decline type Switching power unit 710, first adjuster 720, lifting Switching power unit 730, positive output voltage generator 740 and charge pump conversion hysteria power subsystem 750.
The structure of decline type Switching power unit 710, first adjuster 720, lifting Switching power unit 730 and positive output voltage generator 740 is identical with foregoing with operating principle.
Yet, the charge pump conversion hysteria power subsystem that is different from multiple-voltage power supply apparatus represented among Figure 11, it uses the reference voltage Vint and the first output voltage V out1, the charge pump conversion hysteria power subsystem 750 of represented multiple-voltage power supply apparatus is by utilizing the last up voltage Vx and the first output voltage V out1 to produce negative output voltage Vno, with response enable signal En among Figure 12.
The foregoing description and advantage only do not limit the present invention for example.Description of the invention has explanatory, when not limiting the scope of the invention.All have in that identical invention spirit is following do relevant any modification of the present invention or change, all must be included in the category that the invention is intended to protect.
Claims (30)
1. multiple-voltage power supply apparatus is characterized in that, this multiple-voltage power supply apparatus comprises:
Decline type Switching power unit, it utilizes input voltage vin to produce the reference voltage Vint with the level that is lower than this input voltage;
First adjuster, it produces the first output voltage V out1 by the level of regulating this reference voltage;
Rising type Switching power unit, it produces up voltage Vx by increasing this reference voltage;
The positive output voltage generator, its utilization should be gone up up voltage and be produced positive output voltage Vpo and enable signal En; And
Charge pump conversion hysteria power subsystem, its utilization should go up up voltage and this first output voltage produces negative output voltage Vno, to respond this enable signal.
2. multiple-voltage power supply apparatus as claimed in claim 1 is characterized in that, decline type Switching power unit comprises:
The first switch Q1, its first end loads this input voltage;
The first diode D1, its first end is connected to second end of this first switch, and its second end ground connection;
First inductance L 1, its first end are commonly connected to this second end of this first switch and this first end of this first diode;
First capacitor C 1, its first end are connected to second end and its second end ground connection of this first inductance;
The first feedback voltage generator, it utilizes this reference voltage to produce first feedback voltage Vfb 1; And
First controller, it utilizes this first feedback voltage to produce first control signal, is used to control the On/Off of this first switch.
3. multiple-voltage power supply apparatus as claimed in claim 2,
It is characterized in that this first feedback voltage generator comprises:
First resistance R 1, its first end is connected to the output node of this reference voltage; And
Second resistance R 2, its first end are connected to second end and its second end ground connection of this first resistance, and
Wherein this first feedback voltage is from the common node output of this first resistance and this second resistance.
4. multiple-voltage power supply apparatus as claimed in claim 1 is characterized in that, this rising type Switching power unit comprises:
Second inductance L 2, its first end loads this reference voltage;
Second switch Q2, its first end is connected to second end of this second inductance, and its second end ground connection;
The second diode D2, its first end are commonly connected to this second end of this second inductance and this first end of this second switch;
Second capacitor C 2, its this first end is connected to second end of this second diode, and its second end ground connection;
The second feedback voltage generator, its utilization should be gone up up voltage and be produced second feedback voltage Vfb 2; And
Second controller, it utilizes this second feedback voltage to produce second control signal, is used to control the On/Off of this second switch.
5. multiple-voltage power supply apparatus as claimed in claim 4,
It is characterized in that this second feedback voltage generator comprises:
The 3rd resistance R 3, its first end connects an output node of up voltage on this; And
The 4th resistance R 4, its first end connect second end and its second end ground connection of the 3rd resistance, and
Wherein this second feedback voltage is from the common node output of the 3rd resistance and the 4th resistance.
6. multiple-voltage power supply apparatus as claimed in claim 1 is characterized in that, this charge pump conversion hysteria power subsystem comprises:
Driver, it is operated between up voltage and the earthed voltage on this, and its first input end loads this enable signal;
The 3rd capacitor C 3, its first end connects this output end of driver;
The 3rd diode D3, its first end connects second end of the 3rd electric capacity, and its second end ground connection;
The 4th diode D4, its first end are commonly connected to this second end of the 3rd electric capacity and this first end of the 3rd diode, and its second end is connected to an output node of this negative output voltage;
The 4th capacitor C 4, its first end is connected to this output node of this negative output voltage, and its second end ground connection;
The 3rd feedback voltage generator (351), it is by utilizing this negative output voltage Vno to produce the 3rd feedback voltage Vfb 3; And
The 3rd controller, it is by utilizing the 3rd feedback voltage to produce the 3rd control signal, and the 3rd control signal is supplied to second input of this driver.
7. multiple-voltage power supply apparatus as claimed in claim 6,
It is characterized in that the 3rd feedback voltage generator comprises:
The 5th resistance R 5, its first end is connected to this output node of this negative output voltage; And
The 6th resistance R 6, its first end is connected to second end of the 5th resistance, and its second end is connected to this first output voltage, and
Wherein the 3rd feedback voltage is from the common node output of the 5th resistance and the 6th resistance.
8. multiple-voltage power supply apparatus as claimed in claim 1 is characterized in that, this first adjuster is used to remove one of this reference voltage and switches noise.
9. multiple-voltage power supply apparatus as claimed in claim 8 is characterized in that, comprises at least one first adjuster.
10. multiple-voltage power supply apparatus as claimed in claim 8 is characterized in that, comprises a plurality of first adjusters.
11. multiple-voltage power supply apparatus as claimed in claim 1,
It is characterized in that this positive output voltage generator comprises:
Second adjuster, up voltage produces this positive output voltage by utilizing upward for it; And
Enable square, its generation that detects this positive output voltage to be producing this enable signal,
Wherein this enables the switching noise that square is removed up voltage on this.
12. multiple-voltage power supply apparatus as claimed in claim 2 is characterized in that, this first switch is bipolar transistor or MOS transistor.
13. multiple-voltage power supply apparatus as claimed in claim 4 is characterized in that, this second switch is bipolar transistor or MOS transistor.
14. multiple-voltage power supply apparatus is characterized in that, this multiple-voltage power supply apparatus comprises:
Decline type Switching power unit, it is by the reference voltage Vint that utilizes input voltage vin to produce switching signal Sw and have the level that is lower than this input voltage;
First adjuster, it produces the first output voltage V out1 by the level of regulating this reference voltage;
Charge pump rising type power subsystem, it is by utilizing this switching signal and this input voltage to produce up voltage Vx;
The positive output voltage generator, up voltage produces positive output voltage Vpo and enable signal En by utilizing upward for it; And
Charge pump conversion hysteria power subsystem, it is by utilizing this input voltage and this first output voltage to produce negative output voltage Vno, to respond this enable signal.
15. multiple-voltage power supply apparatus is characterized in that, this multiple-voltage power supply apparatus comprises:
Decline type Switching power unit, it is by the reference voltage Vint that utilizes input voltage vin to produce switching signal Sw and have the level that is lower than this input voltage;
First adjuster, it produces the first output voltage V out1 by the level of regulating this reference voltage;
Charge pump rising type power subsystem, it is by utilizing this switching signal and this input voltage to produce up voltage Vx;
The positive output voltage generator, up voltage produces positive output voltage Vpo and enable signal En by utilizing upward for it; And
Charge pump conversion hysteria power subsystem, up voltage produces negative output voltage Vno with this first output voltage by utilizing upward for it, to respond this enable signal.
16. multiple-voltage power supply apparatus is characterized in that, this multiple-voltage power supply apparatus comprises:
Decline type Switching power unit, it is by the reference voltage Vint that utilizes input voltage vin to produce to have the level that is lower than this input voltage;
First adjuster, it produces the first output voltage V out1 by the level of regulating this reference voltage;
Lifting Switching power unit, it produces up voltage Vx by increasing this input voltage;
The positive output voltage generator, up voltage produces positive output voltage Vpo and enable signal En by utilizing upward for it; And
Charge pump conversion hysteria power subsystem, it is by utilizing this input voltage and this first output voltage to produce negative output voltage Vno, to respond this enable signal.
17. multiple-voltage power supply apparatus is characterized in that, this multiple-voltage power supply apparatus comprises:
Decline type Switching power unit, it is by the reference voltage Vint that utilizes input voltage vin to produce to have the level that is lower than this input voltage;
First adjuster, it produces the first output voltage V out1 by the level of regulating this reference voltage;
Lifting Switching power unit, it is by utilizing this input voltage to produce up voltage Vx;
Second voltage regulator, up voltage produces positive output voltage Vpo and enable signal En by utilizing upward for it; And
Charge pump conversion hysteria power subsystem, it is by utilizing this input voltage and this first output voltage to produce negative output voltage Vno, to respond this enable signal.
18., it is characterized in that this decline type Switching power unit comprises as any described multiple-voltage power supply apparatus in the claim 14 to 17:
The first switch Q1, its first end loads this input voltage;
The first diode D1, its first end are connected to second end and its second end ground connection of this first switch;
First inductance L 1, its first end are commonly connected to this second end of this first switch and this first end of this first diode;
First capacitor C 1, its first end are connected to second end and its second end ground connection of this first inductance;
The first feedback voltage generator, it is by utilizing this reference voltage to produce first feedback voltage Vfb 1; And
First controller, it is by first control signal of utilizing this first feedback voltage to produce to be used to the On/Off of controlling this first switch.
19. multiple-voltage power supply apparatus as claimed in claim 18 is characterized in that, this first feedback voltage generator comprises:
First resistance R 1, its first end is connected to the output node of this reference voltage; And
Second resistance R 2, its first end are connected to second end and its second end ground connection of this first resistance, and
Wherein this first feedback voltage is from the common node output of this first resistance and this second resistance.
20. as claim 14 or 15 described multiple-voltage power supply apparatus,
It is characterized in that this charge pump rising type power subsystem comprises:
The 5th diode D5, its first end is connected to this input voltage;
The 5th capacitor C 5, its first end are connected to the switching signal Sw of this decline type Switching power unit and second end that its second end is connected to the 5th diode;
The 6th diode D6, its first end are commonly connected to this second end of the 5th electric capacity and this second end of the 5th diode; And
The 6th capacitor C 6, its first end are connected to second end and its second end ground connection of the 6th diode, and
Wherein should go up the common node output of up voltage from this first end of this second end of the 6th diode and the 6th electric capacity.
21., it is characterized in that this lifting Switching power unit comprises as claim 16 or 17 described multiple-voltage power supply apparatus:
The 3rd inductance L 3, its first end loads this input voltage;
The 3rd switch Q3, its first end are connected to second end and its second end ground connection of the 3rd inductance;
The 7th capacitor C 7, its first end are commonly connected to this second end of the 3rd inductance and this first end of the 3rd switch;
The 8th capacitor C 8, its first end are connected in parallel to this first end of the 7th electric capacity;
The 9th resistance R 9, its first end is connected serially to second end of the 8th electric capacity, and its second end is connected in parallel to one second end of the 7th electric capacity;
The 7th diode D7, its first end are commonly connected to this second end and its second end ground connection of this second end He the 9th resistance of the 7th electric capacity;
The 4th inductance L 4, its first end are commonly connected to this second end of the 7th electric capacity and this second end of the 9th resistance, and its second end is connected to the output node of up voltage on this,
The 4th feedback voltage generator (731), up voltage produces one the 4th feedback voltage Vfb 4 by utilizing upward for it; And
The 4th controller, it is by utilizing the 4th feedback voltage to produce to be used to one the 4th control signal of controlling the 3rd switch open/close.
22. multiple-voltage power supply apparatus as claimed in claim 21 is characterized in that, the 4th feedback voltage Vfb 4 comprises:
The 7th resistance R 7, its first end is connected to the output node of up voltage on this; And
The 8th resistance R 8, its first end is connected to second end of the 7th resistance, and its second end ground connection, and
Wherein the 4th feedback voltage is exported from the common node of the 7th resistance and the 8th resistance.
23., it is characterized in that this charge pump conversion hysteria power subsystem comprises as claim 14 or 16 described multiple-voltage power supply apparatus:
Driver, it is operated between this input voltage and earthed voltage, and its first input end loads this enable signal;
The 3rd capacitor C 3, its first end is connected to this output end of driver;
The 3rd diode D3, its first end are connected to second end and its second end ground connection of the 3rd electric capacity;
The 4th diode D4, its first end are commonly connected to this second end and this first end of the 3rd diode and the output node that its second end is connected to this negative output voltage of the 3rd electric capacity;
The 4th capacitor C 4, its first end are connected to this output node and this second end ground connection of this negative output voltage;
The 3rd feedback voltage generator, it is by utilizing this negative output voltage Vno to produce the 3rd feedback voltage Vfb 3; And
The 3rd controller, it is by utilizing the 3rd feedback voltage to produce the 3rd control signal, and the 3rd control signal is loaded on second input of this driver.
24. multiple-voltage power supply apparatus as claimed in claim 23 is characterized in that, the 3rd feedback voltage generator comprises:
The 5th resistance R 5, its first end is connected to this output node of this negative output voltage; And
Second end and its second end that the 6th resistance R 6, its first end are connected to the 5th resistance are connected to this first output voltage, and
Wherein the 3rd feedback voltage is from the common node output of the 5th resistance and the 6th resistance.
25., it is characterized in that this charge pump conversion hysteria voltage cell comprises as claim 15 or 17 described multiple-voltage power supply apparatus:
Driver, it is operated between up voltage and the earthed voltage on this, and its first input end loads this enable signal;
The 3rd capacitor C 3, its first end is connected to this output end of driver;
The 3rd diode D3, its first end are connected to second end and its second end ground connection of the 3rd electric capacity;
The 4th diode D4, its first end are commonly connected to this second end of the 3rd electric capacity and this first end of the 3rd diode, and its second end is connected to an output node of this negative output voltage;
The 4th capacitor C 4, its first end are connected to this output node and its second end ground connection of this negative output voltage;
The 3rd feedback voltage generator, it is by utilizing this negative output voltage Vno to produce the 3rd feedback voltage Vfb 3; And
The 3rd controller, it is by utilizing the 3rd feedback voltage to produce the 3rd control signal, and the 3rd control signal is loaded on second input of this driver.
26. multiple-voltage power supply apparatus as claimed in claim 25 is characterized in that, the 3rd feedback voltage generator comprises:
The 5th resistance R 5, its first end is connected to this output node of this negative output voltage; And
Second end and its second end that the 6th resistance R 6, its first end are connected to the 5th resistance are connected to this first output voltage; And
Wherein the 3rd feedback voltage is from the common node output of the 5th resistance and the 6th resistance.
27., it is characterized in that at least one first adjuster is removed the switching noise of this reference voltage as any described multiple-voltage power supply apparatus in the claim 14 to 17.
28., it is characterized in that a plurality of first adjusters are removed the switching noise of this reference voltage as any described multiple-voltage power supply apparatus in the claim 14 to 17.
29., it is characterized in that this positive output voltage generator comprises as any described multiple-voltage power supply apparatus in the claim 14 to 17:
Second adjuster, up voltage produces this positive output voltage by utilizing upward for it; And
Enable square, its generation that detects this positive output voltage to be producing this enable signal,
Wherein this enables the switching noise that square is removed up voltage on this.
30. multiple-voltage power supply apparatus as claimed in claim 18 is characterized in that, this first switch is bipolar transistor or MOS transistor.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070129885A KR100917976B1 (en) | 2007-12-13 | 2007-12-13 | Power supply for multiple output voltages |
| KR10-2007-0129885 | 2007-12-13 | ||
| PCT/KR2008/007375 WO2009075547A2 (en) | 2007-12-13 | 2008-12-12 | Power supply for multiple output voltages |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101884159A CN101884159A (en) | 2010-11-10 |
| CN101884159B true CN101884159B (en) | 2013-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008801190716A Expired - Fee Related CN101884159B (en) | 2007-12-13 | 2008-12-12 | Multiple-voltage power supply apparatus |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR100917976B1 (en) |
| CN (1) | CN101884159B (en) |
| TW (1) | TWI379498B (en) |
| WO (1) | WO2009075547A2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437733B (en) * | 2011-12-01 | 2014-01-22 | 无锡中星微电子有限公司 | Power management circuit |
| KR101306865B1 (en) * | 2012-02-09 | 2013-09-10 | (주)태진기술 | High Voltage IC |
| KR102274958B1 (en) | 2019-04-15 | 2021-07-08 | 주식회사 에스제이솔루션 | Power Supply Unit Using Intellectual Pre-Regulator |
| CN112737290B (en) * | 2020-12-23 | 2022-07-08 | 深圳市航天新源科技有限公司 | High-integration non-isolated positive and negative voltage output multi-port converter circuit |
| CN113765369B (en) * | 2021-09-01 | 2024-01-23 | 深圳市爱协生科技股份有限公司 | Novel voltage conversion circuit for converting positive voltage into negative voltage in complex power domain |
| CN113824315B (en) * | 2021-10-20 | 2024-02-06 | 京东方科技集团股份有限公司 | Power supply generating circuit and display device |
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| US6445623B1 (en) * | 2001-08-22 | 2002-09-03 | Texas Instruments Incorporated | Charge pumps with current sources for regulation |
| CN1371543A (en) * | 1999-06-25 | 2002-09-25 | 伊利诺伊大学评议会 | Dynamically-switched power converter |
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| CN1574591A (en) * | 2003-05-21 | 2005-02-02 | 罗姆股份有限公司 | Power supply for positive and negative output voltages |
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| JPH0727831Y2 (en) * | 1989-10-25 | 1995-06-21 | 富士電機株式会社 | Buck-boost DC-DC converter |
| JPH03278208A (en) * | 1990-03-28 | 1991-12-09 | Seiko Epson Corp | Power supply circuit |
| US5483152A (en) * | 1993-01-12 | 1996-01-09 | United Memories, Inc. | Wide range power supply for integrated circuits |
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2007
- 2007-12-13 KR KR1020070129885A patent/KR100917976B1/en not_active IP Right Cessation
-
2008
- 2008-12-11 TW TW097148227A patent/TWI379498B/en not_active IP Right Cessation
- 2008-12-12 WO PCT/KR2008/007375 patent/WO2009075547A2/en active Application Filing
- 2008-12-12 CN CN2008801190716A patent/CN101884159B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1371543A (en) * | 1999-06-25 | 2002-09-25 | 伊利诺伊大学评议会 | Dynamically-switched power converter |
| US6445623B1 (en) * | 2001-08-22 | 2002-09-03 | Texas Instruments Incorporated | Charge pumps with current sources for regulation |
| US6903535B2 (en) * | 2002-04-16 | 2005-06-07 | Arques Technology, Inc. | Biasing system and method for low voltage DC—DC converters with built-in N-FETs |
| US6756772B2 (en) * | 2002-07-08 | 2004-06-29 | Cogency Semiconductor Inc. | Dual-output direct current voltage converter |
| CN1574591A (en) * | 2003-05-21 | 2005-02-02 | 罗姆股份有限公司 | Power supply for positive and negative output voltages |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2009075547A2 (en) | 2009-06-18 |
| CN101884159A (en) | 2010-11-10 |
| TWI379498B (en) | 2012-12-11 |
| WO2009075547A3 (en) | 2009-09-03 |
| KR100917976B1 (en) | 2009-09-18 |
| KR20090062551A (en) | 2009-06-17 |
| TW200937821A (en) | 2009-09-01 |
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