CN101202504A - Dc-dc convertor - Google Patents
Dc-dc convertor Download PDFInfo
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- CN101202504A CN101202504A CNA2007101957231A CN200710195723A CN101202504A CN 101202504 A CN101202504 A CN 101202504A CN A2007101957231 A CNA2007101957231 A CN A2007101957231A CN 200710195723 A CN200710195723 A CN 200710195723A CN 101202504 A CN101202504 A CN 101202504A
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Abstract
The invention relates to a DC-DC converter circuit which supplies a plurality of positive voltages and/ negative voltages with high efficiency through an electric single inductor. The circuit is characterized in that the first terminal of the electric inductor is connected with the DC power supply terminal; the second terminal of the electric inductor is connected with the leakage terminal of a N-model MOSFET; the second terminal of the electric inductor is connected with the anode terminal of a first rectifier diode, and a first capacitor for eliminating the ripples is connected with a first output terminal; the source terminal of the N-model MOSFET is connected with the ground (GND); all the anode terminals of n numbers of rectifier diodes are connected with the second terminal of the electric inductor; the cathode terminals of n-1 numbers of rectifier diodes among the n numbers of rectifier diodes beyond the first rectifier diode are connected respectively with the source terminals of n-1 numbers of P-model MOSFET; and each gate leakage terminal of the n-1 numbers of P-model MOSFET is connected respectively with each capacitor for eliminating the ripples and each n-1 numbers of output ends, etc.
Description
Technical field
The present invention provides the DC/DC convertor circuitry of a plurality of positive voltages and/or negative voltage relevant for DC/DC convertor circuitry in particular to using single inductor.
Background technology
In battery-operated type electronic installations such as kneetop computer, mobile phone, LCD device, computer, must be with supply power to the suitable voltage of the circuit of the voltage transformation apparatus for converting of the battery of device.The DC-to-DC converter that is used for voltage transformation has kind miscellaneous.
Among DC-to-DC converter,, therefore can use widely owing to use the DC-to-DC converter of inductor to have the cause that under high efficiency, to export the characteristic of all voltage.In the DC-to-DC converter of using inductor, in the past in order to obtain a plurality of same polarity voltages, individually obtain each voltage method so adopt, as follows: 1) obtain intrasystem ceiling voltage with DC-to-DC converter after, obtain the low-voltage of being desired with LDO adjuster (low-voltage difference adjustor); Or 2) DC-to-DC converter identical with the number of employed voltage in the system is set.
Patent Document 1: the spy opens the 2006-254700 communique.
Summary of the invention
But, above-mentioned 1) method in since the power consumption that produces at adjuster be inevitable so, therefore cause electrical efficiency low.In addition, above-mentioned 2) method in, though 1) the low problem of electrical efficiency alleviated since use a plurality of inductors so, so cost improves.
The objective of the invention is to by using single inductor that a kind of low cost DC-direct current transducer circuit of supplying with the function of a plurality of positive voltages and/or negative voltage with high efficiency that has is provided.
The means that problem solves
Because DC-to-DC converter of the present invention has following formation, therefore can obtain a plurality of positive voltages and/or negative voltage by using single transducer.In addition, be used for flat-panel screens (especially, liquid crystal indicator (LCD)), can seek the low price of LCD etc. by DC-to-DC converter with formation of the present invention.
(1) a kind of DC/DC convertor circuitry comprises: at least 1 inductor; At least 1 N type MOSFET; N rectifier diode; N-1 P type MOSFET; Remove the ripple capacitor for n; N control circuit; And n output; Wherein, n system shows the integer more than 2; The 1st end of described inductor is connected with dc power supply terminal; The 2nd end of described inductor is connected with the drain electrode end of N type MOSFET; The negative electrode of the 1st rectifier diode in the described n rectifier diode is connected with the 1st output in the 1st capacitor in the capacitor and the described n output with described removal ripple; The source terminal of described N type MOSFET is connected with ground connection (GND) end; The 2nd end of the whole and described inductor of the anode tap of a described n rectifier diode is connected; The cathode terminal of n-1 rectifier diode beyond the 1st rectifier diode in the described n rectifier diode is connected with the source terminal of each described n-1 P type MOSFET respectively; Each drain electrode end of described n-1 P type MOSFET is connected respectively with n-1 output beyond capacitor and described the 1st output with described the 1st capacitor n-1 removal ripple in addition; Output with described DC power supply terminal voltage 1 control circuit that is power supply in n is connected with the gate terminal of described N type MOSFET; Be in the DC/DC convertor circuitry that is connected of the output of n-1 control circuit of power supply with voltage with described the 1st output, control each gate terminal of described n-1 P type MOSFET by the voltage that makes described the 1st output than the diverse mode of voltage of other an output end voltage height and a described n output, and export n different direct voltage.
(2), remove ripple for wherein said n and carry out with the time partitioning scheme respectively with the electric power supply of capacitor as (1) described DC/DC convertor circuitry.
(3) as (1) or (2) described DC/DC convertor circuitry, wherein said n is 2, exports 2 different direct voltages.
(4) as appointing in (1) to (3)-described DC/DC convertor circuitry, also comprise: the 2nd P type MOSFET is connected between the 1st end of described dc power supply terminal and described inductor; M rectifier diode; M-1 N type MOSFET; Remove the ripple capacitor for m; M-1 control circuit; And m output; Wherein, m represents the integer more than 2; The anode of the 1st rectifier diode in the rectifier diode of a described m diode is connected with the 1st output in the 1st capacitor in the capacitor and the described m output with described m removal ripple; The 1st end of the whole and described inductor of the cathode terminal of a described m rectifier diode is connected; M-1 rectification beyond the 1st diode in the described m diode is connected with the source terminal of other described m-1 N type MOSFET respectively with the anode tap of diode; Each drain electrode end of described m-1 N type MOSFET is connected respectively with m-1 output beyond capacitor and described the 1st output with described the 1st capacitor m-1 removal ripple in addition; Each gate terminal of described m-1 N type MOSFET and voltage with described the 1st output are that the output of m-1 control circuit of power supply is connected respectively, and be controlled and make that the voltage of described the 1st output is high than the voltage of other m-1 output and a voltage described m output is different fully, with m different direct voltage of bearing of further output.
(5) a kind of DC/DC convertor circuitry comprises: 1 inductor; At least 1 P type MOSFET; M rectifier diode; M-1 N type MOSFET; Remove the ripple capacitor for m; M control circuit; And m output; Wherein, n is the integer of expression more than 2; The source terminal of described P type MOSFET is connected with dc power supply terminal; The 1st end of described inductor is connected with the drain electrode end of described P type MOSFET; The 2nd end of described inductor is connected with ground connection (GND); The anode of the 1st rectifier diode in the described m rectifier diode is connected with the 1st output in the 1st capacitor in the capacitor and the described m output with described removal ripple; The 1st end of the whole and described inductor of the cathode terminal of a described m rectifier diode is connected; The anode tap of m-1 rectifier diode beyond the 1st rectifier diode in the described m rectifier diode is connected with the source terminal of other described m-1 N type MOSFET respectively; Each drain electrode end of described m-1 N type MOSFET is connected respectively with m-1 output beyond capacitor and described the 1st output with described the 1st capacitor m-1 removal ripple in addition; Output with described DC power supply terminal voltage 1 control circuit that is power supply in m is connected with the gate terminal of described P type MOSFET; Be in the DC/DC convertor circuitry that is connected respectively of the output of m-1 control circuit of power supply with voltage with described the 1st output, control each gate terminal of described m-1 N type MOSFET by the voltage that makes described the 1st output than the diverse mode of voltage of other an output end voltage height and a described m output, and export m different direct voltage.
(6), remove ripple for wherein said m and carry out with the time partitioning scheme respectively with the supply of the negative voltage of capacitor as (4) or (5) described DC/DC convertor circuitry.
(7) a kind of flat-panel screens is used as arbitrary described DC/DC convertor circuitry in (1) to (6).
The effect of invention
The present invention can provide a kind of low cost DC-direct current transducer circuit of supplying with the function of a plurality of positive voltages and/or negative voltage with high efficiency that has by using single inductor.In addition, be used for flat-panel screens (especially, liquid crystal indicator (LCD)), can seek the low price of LCD etc. by DC-to-DC converter with formation of the present invention.
For above-mentioned and other purposes of the present invention, feature and advantage can be become apparent, cited below particularlyly go out preferred embodiment, and cooperate appended graphicly, be described in detail below:
Description of drawings
Fig. 1 is the circuit diagram of the DC-to-DC converter of expression embodiments of the invention 1.
Fig. 2 is the circuit diagram of the DC-to-DC converter of expression embodiments of the invention 2.
Fig. 3 is the circuit diagram of the DC-to-DC converter of expression embodiments of the invention 3.
Fig. 4 is the circuit diagram of the DC-to-DC converter of expression embodiments of the invention 4.
The main element symbol description
11 DC power supply
12 inductors
21 outputs
22 outputs
23 outputs
24 outputs
25 outputs
31N type MOSFET
32P type MOSFET
33P type MOSFET
34P type MOSFET
35P type MOSFET
41 rectifier diodes
42 rectifier diodes
43 rectifier diodes
44 rectifier diodes
45 rectifier diodes
51 control circuits
52 control circuits
53 control circuits
54 control circuits
61 remove the ripple capacitor
62 remove the ripple capacitor
63 remove the ripple capacitor
64 remove the ripple capacitor
71 inductors the 2nd end
72 inductors the 1st end
92P type MOSFET
93P type MOSFET
94P type MOSFET
101 rectifier diodes
102 rectifier diodes
103 rectifier diodes
104 rectifier diodes
112 control circuits
113 control circuits
114 control circuits
Embodiment
Describe the concrete example of DC-to-DC converter of the present invention in detail by following embodiment.The present invention does not limit these embodiment.
Embodiment 1
Fig. 1 is the circuit diagram of the DC-to-DC converter of expression embodiments of the invention 1.As shown in Figure 1, the DC-to-DC converter of embodiment 1 by the inductor 12 that is connected with DC power supply 11, switch MOS FET31,32, rectification with Schottky barrier diode (Schottky barrier diode) 41,42, output voltage ripple lower with capacitor 61,62, be used to control described switch MOS FET control circuit 51,52, output voltage error amplifier (not shown), reach 21,22 formations of output.
Constitute according to foregoing circuit, can use single inductor and obtain a plurality of positive voltages by single DC power supply.
This DC/DC convertor circuitry is supplied with the alternatively output 21,22 of output with the time partitioning scheme with electric power from DC power supply 11, at this moment, at output voltage for desired value under the situation for undertension, control signal (figure does not show) from error amplifier is conveyed to described control circuit 51,52, and supply capability.In addition, under output voltage surpasses the situation of desired value, by from the control signal of error amplifier and the driving of switch MOS FET stops.In addition since the operation of above-mentioned voltage control at each output and with the time partitioning scheme individually implement so, therefore supply capability only unilaterally.Control for this circuit of output voltage requires false following 4 kinds of states: 1) to output 21,22 supply capabilities, 2) only to output 21 supply capabilities, 3) only to output 22 supply capabilities, 4) electric power supplies with and stops.
At this, 1), at first, becomes the state of " height " level and P type MOSFET 32 shutoffs in the output of control circuit 52 under the situation of output 21,22 supply capabilities, the output of control circuit 51 becomes " height " level and N type MOSFET 31 conductings, and voltage puts on the two ends of inductor 12.The electric current of inductor 12 in time and proportional increase, afterwards since by control circuit 51 output " low " level N type MOSFET 31 turn-offs so, so the electric current of inductor 12 stops to increase.Afterwards, arbitrary voltage that rises to conducting of inductor both end voltage rectifier diode 41,42.At this moment, the grid voltage of P type MOSFET32 becomes the voltage of output 21, and compared to for the required inductor voltage of output 21 supply capabilities, to the required inductor voltage of output 22 supply capabilities only the Vth of P type MOSFET partly uprise.That is to say, under this state, the 41 first conductings of inductor both end voltage rectifier diode and by inductor and supply capability to output 21.Therefore, P type MOSFET 32 does not reach the voltage of conducting, and not supply capability to output 22.Afterwards, inductor current gets back to 0 on one side to output 21 supply capabilities Yi Bian descend continuously and healthily.
Then, conversion is supplied with operation to the electric power of output 22.At first, the output of control circuit 52 is changed to " low " by " height ", and P type MOSFET 32 is in conducting state, and the output of control circuit 51 becomes " height " level and N type MOSFET 31 conductings, and applies voltage in inductor 12 two ends.The electric current of this inductor 12 in time and proportional increase, afterwards because control circuit 51 outputs " low " and N type MOSFET 31 turn-offs so, so the electric current of inductor 12 stops to increase.Afterwards, the voltage at inductor 12 two ends rises to the voltage of arbitrary conducting of rectifier diode 41,42, and at this moment, the grid of P type MOSFET32 becomes ground connection (GND) voltage, and becomes the conducting state that voltage more than the Vth puts on source electrode.Output 21) voltage is if set the words low than the voltage of output 22 for, because rectifier diode 42 starts earlier, therefore rectifier diode 42 produces ripple because of the voltage of conducting, the voltage of inductor 12 by inductor 12 and supply capability to output 22.That is to say, under this kind state, rectifier diode 42 first conductings, by inductor 12 to output 22 supply capabilities.Therefore, rectifier diode 41 does not reach the voltage of conducting, and not supply capability to output 21.Afterwards, the electric current of inductor 12 gets back to 0 on one side to output 22 supply capabilities Yi Bian descend continuously and healthily.
By repeating above operation, can utilize the time partitioning scheme that output 21 and 22 is carried out electric power and supply with.
Then, 2) only under output 21 is carrying out situation that electric power supplies with, skip above-mentioned 1) later half operation.In addition, 3) only under output 22 is carrying out situation that electric power supplies with, skip above-mentioned 1) later half operation.4) supply with under the situation about stopping at electric power, skip above-mentioned 1) whole operations.That is to say, control circuit 51 outputs " low ", and N type MOSFET 31 is turn-offed.
Embodiment 2
Fig. 2 is the circuit diagram of the DC-to-DC converter of expression embodiments of the invention 2.Embodiment 2 is illustrated in the circuit of embodiment 1 the further example of 3 above voltage condition of output.As shown in Figure 2, in the present embodiment, the voltage of output is set according to 21,22,23,24 order from high side.For example, output 23 is being carried out under the situation that electric power supplies with, the output of this control circuit 53 is being set at " low " level, starting P type MOSFET 33, after the output of control circuit 51 is set at " height " level, start N type MOSFET 31.Afterwards, the electric current of inductor 12 is proportional increase according to the time, and N type MOSFET 31 turn-offs event because control circuit 51 is exported " low " level, so the electric current increase of inductor 12 stops.Afterwards, the voltage at inductor 12 two ends rises to the voltage of arbitrary startup of rectifier diode 41～44.At this, because P type MOSFET 33 starts, can be by rectifier diode 43 and only to output 23 supply capabilities.At this because the voltage of diode 41 and 42 outputs 21 and 22 cause high than the 2nd end 71 of inductor, and since rectifier diode 41 become the reverse blas current potential so, therefore turn-off and be not subjected to electric power and supply with.In addition, the voltage of specific output end 23 is low though the voltage of output 24 becomes, because P type MOSFET 34 turn-offs, therefore also not to output 24 supply capabilities.Below, to the supply of output 22 and 24 also by carrying out with above-mentioned the same order.
Embodiment 3
Fig. 3 is the circuit diagram of the DC-to-DC converter of expression embodiments of the invention 3.Embodiment 3 is illustrated in the circuit of embodiment 2 the further example of the situation of the negative voltage of output more than 3.With embodiment 2 different locating be: append P type MOSFET 35 and control circuit 55 in order to export a plurality of negative voltages at input side, and append rectification diode 101,102,103,104, removal ripple capacitor 64,63,62,61, output 121,122,123,124, control circuit 112,113,114 and P type MOSFET 92,93,94 at outlet side.The operation that the electric power of output 121,122,123,124 is supplied with is identical with embodiment 1.
At first, for output 121 is supplied with negative voltages, the output of control circuit 55 is controlled to be " low " level, makes P type MOSFET 35 conductings.Afterwards, the output of control circuit 51 is controlled to be " height " level, makes N type MOSFET 31 conductings.Therefore, the electric current of inductor in time and proportional increase.Then, in case from control circuit 55 output " height " level, then P type MOSFET 35 turn-offs, and the increase of inductor current stops.At this, because N type MOSFET 31 is former with regard to this conducting, so inductor the 2nd end 71 is fixed in ground connection (GND).Therefore, inductor first voltage commutation is with arbitrary voltage that continues to be reduced to startup of diode.At this moment, the grid voltage of N type MOSFET 92,93,94 becomes the voltage of output 121, and compared to for the required voltage of output 122,123,124 supply capabilities, the amount of Vth of N type MOSTFET that become only low.That is to say that under this state, inductor both end voltage rectifier diode 101 starts earlier and rectification becomes the positive direction bias voltage with diode 101 and be reduced to the voltage of startup.Electric current flow to rectifier diode 101, inductor 12 by N type MOSFET from output 121, and supplies with negative voltage in output 121.Afterwards, inductor current continues to descend rapidly and gets back to 0.In a series of operation,, therefore can not produce adverse current from the electric current of output 21,22,23,24 because rectifier diode 41,42,43,44 becomes the event of reverse blas.
Then, conversion is supplied with operation to the negative voltage of output 122.At first, the output of control circuit 55 is controlled to be " low " level, and starts P type MOSFET 35.Afterwards, the output of control circuit 51 is controlled to be " height " level, and starts N type MOSFET 31.Therefore, inductor current in time and proportional increase.Then, in case from control circuit 55 output " height " level, then P type MOSFET 35 turn-offs, and the increase of inductor current stops.At this, because N type MOSFET 31 is former with regard to this conducting, so inductor the 2nd end 71 is fixed in ground connection (GND).Therefore, inductor first voltage is the arbitrary voltage that continues be reduced to startup of rectification with diode.At this moment, the grid voltage of P type MOSFET 92 becomes ground connection (GND) voltage, and the grid voltage of N type MOSFET 93,94 becomes the voltage of output 121, and compared to for the required voltage of output 123,124 supply capabilities, the amount of Vth of N type MOSTFET that become only low.That is to say that under this state, the inductor both end voltage is that rectifier diode 102 starts earlier and rectification becomes the positive direction bias voltage with diode 102 and be reduced to the voltage of startup.Electric current flow to rectifier diode 102, inductor 12 by N type MOSFET from output 122, and supplies with negative voltage in output 121.Afterwards, inductor current continues to descend rapidly and gets back to 0.In a series of operation,, therefore can not produce adverse current from the electric current of output 121,123,124 because rectifier diode 101,103,104 becomes the event of reverse blas.Below, to the supply of output 22 and 24 also by carrying out with above-mentioned the same order.Below, to the supply of output 123 and 124 also by carrying out with above-mentioned the same order.As previously discussed, can supply with negative voltage in regular turn to output 121,122,123,124.
Fig. 4 is the circuit diagram of the DC-to-DC converter of expression embodiments of the invention 4.Embodiment 4 does not only export the example of the situation of a plurality of negative voltages for exporting positive voltage.As shown in Figure 4, at input side P type MOSFET 35 and control circuit 55 are set, and a plurality of rectifications diode 101,102,103,104, a plurality of removal ripple capacitor 64,63,62,61 and a plurality of output 121,122,123,124, control circuit 112,113,114 and P type MOSFET 92,93,94 are set at outlet side.Be used for to the operation of output 121,122,123,124 supply negative voltages also identical with embodiment 3.
Claims (7)
1. DC/DC convertor circuitry comprises:
At least inductor, the 1st end of wherein said inductor is connected with a direct current power end;
At least 1 N type MOSFET, the source terminal of described N type MOSFET is connected with a ground connection (GND) end, and the 2nd end of described inductor is connected with the drain electrode end of described N type MOSFET;
N rectifier diode, the 2nd end of the whole and described inductor of the anode tap of a described n rectifier diode is connected;
The cathode terminal of n-1 rectifier diode beyond n-1 P type MOSFET, the 1st rectifier diode in the described n rectifier diode is connected with the source terminal of each described n-1 P type MOSFET respectively;
Remove the ripple capacitor for n;
N control circuit is connected with the gate terminal of described N type MOSFET with the output of described DC power supply terminal voltage 1 control circuit that is power supply in n; And
N output, the negative electrode of the 1st rectifier diode in the wherein said n rectifier diode is connected with the 1st output in the 1st capacitor in the capacitor and the described n output with described removal ripple, and each drain electrode end of described n-1 P type MOSFET is connected respectively with n-1 output beyond capacitor and described the 1st output with described the 1st capacitor n-1 removal ripple in addition;
Wherein, n is the integer of expression more than 2; Be in the DC/DC convertor circuitry that is connected of the output of n-1 control circuit of power supply with voltage with described the 1st output, control each gate terminal of described n-1 P type MOSFET by the voltage that makes described the 1st output than the diverse mode of voltage of other an output end voltage height and a described n output, and export n different direct voltage.
2. DC/DC convertor circuitry as claimed in claim 1, a wherein said n ripple are removed with the electric power supply of capacitor and are carried out with the time partitioning scheme respectively.
3. DC/DC convertor circuitry as claimed in claim 1 or 2, wherein said n are 2, export 2 different direct voltages.
4. as appointing in the claim 1 to 3-described DC/DC convertor circuitry, also comprise:
The 2nd P type MOSFET is connected between the 1st end of described dc power supply terminal and described inductor;
M rectifier diode, the 1st end of the whole and described inductor of the cathode terminal of a described m rectifier diode is connected;
M-1 rectification beyond m-1 N type MOSFET, the 1st diode in the wherein said m diode is connected with the source terminal of other described m-1 N type M OSFET respectively with the anode tap of diode;
Remove the ripple capacitor for m;
M-1 control circuit; And
M output, the anode of the 1st rectifier diode in the rectifier diode of a wherein said m diode is connected with the 1st output in the 1st capacitor in the capacitor and the described m output with described m removal ripple, and each drain electrode end of described m-1 N type MOSFET is connected respectively with m-1 output beyond capacitor and described the 1st output with described the 1st capacitor m-1 removal ripple in addition;
Wherein, m shows the integer more than 2; Each gate terminal of described m-1 N type MOSFET and voltage with described the 1st output are that the output of m-1 control circuit of power supply is connected respectively, and be controlled and make that the voltage of described the 1st output is high than the voltage of other m-1 output and a voltage described m output is different fully, with m different direct voltage of bearing of further output.
5. DC/DC convertor circuitry comprises:
1 inductor;
At least 1 P type MOSFET, the source terminal of wherein said P type MOSFET is connected with a direct current power end, and the 1st end of described inductor is connected with the drain electrode end of described P type MOSFET, and the 2nd end of described inductor is connected with ground connection (GND);
M rectifier diode, the 1st end of the whole and described inductor of the cathode terminal of a wherein said m rectifier diode is connected;
The anode tap of m-1 rectifier diode beyond m-1 N type MOSFET, the 1st rectifier diode in the described m rectifier diode is connected with the source terminal of other described m-1 N type MOSFET respectively;
Remove the ripple capacitor for m;
M control circuit is connected with the gate terminal of described P type MOSFET with the output of described DC power supply terminal voltage 1 control circuit that is power supply in m; And
M output, the anode of the 1st rectifier diode in the described m rectifier diode is connected with the 1st output in the 1st capacitor in the capacitor and the described m output with described removal ripple, and m-1 ripple beyond each drain electrode end of described m-1 N type MOSFET and described the 1st capacitor removed with capacitor and described the 1st output m-1 output in addition and be connected respectively;
Wherein, n is the integer of expression more than 2; Be in the DC/DC convertor circuitry that is connected respectively of the output of m-1 control circuit of power supply with voltage with described the 1st output, control each gate terminal of described m-1 N type MOSFET by the voltage that makes described the 1st output than the diverse mode of voltage of other an output end voltage height and a described m output, and export m different direct voltage.
6. as claim 4 or 5 described DC/DC convertor circuitries, remove ripple for wherein said m and carry out with the time partitioning scheme respectively with the supply of the negative voltage of capacitor.
7. a flat-panel screens is used as arbitrary described DC/DC convertor circuitry in the claim 1 to 6.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP335485/06 | 2006-12-13 | ||
| JP2006335485A JP2008148514A (en) | 2006-12-13 | 2006-12-13 | Dcdc converter |
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| Publication Number | Publication Date |
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| CN101202504A true CN101202504A (en) | 2008-06-18 |
| CN101202504B CN101202504B (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007101957231A Expired - Fee Related CN101202504B (en) | 2006-12-13 | 2007-12-13 | Dc-dc convertor |
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| JP (1) | JP2008148514A (en) |
| CN (1) | CN101202504B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101950541A (en) * | 2010-07-12 | 2011-01-19 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN102340242A (en) * | 2010-07-20 | 2012-02-01 | 文科泰克控股公司 | DC/DC converter circuit and method for controlling DC/DC converter circuit |
| CN102751868A (en) * | 2011-07-07 | 2012-10-24 | 矽创电子股份有限公司 | Voltage converter |
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| US8049411B2 (en) | 2008-06-05 | 2011-11-01 | Idemitsu Kosan Co., Ltd. | Material for organic electroluminescence device and organic electroluminescence device using the same |
| KR101013153B1 (en) | 2009-06-18 | 2011-02-10 | 주식회사 룩센테크놀러지 | Single inductor dc voltage converting circuit |
| JP2012210063A (en) * | 2011-03-29 | 2012-10-25 | Yamaha Corp | Voltage conversion circuit |
| KR101585872B1 (en) * | 2014-03-28 | 2016-01-22 | 주식회사 이노와이어리스 | universal power suppply apparatus for system on chip |
| JP2018007386A (en) | 2016-06-30 | 2018-01-11 | 株式会社東芝 | Dc-dc converter and electric power supply |
| KR102006023B1 (en) * | 2016-12-02 | 2019-10-02 | 에스케이하이닉스 주식회사 | Apparatus for testing a semiconductor device |
| JP6936993B2 (en) * | 2020-02-21 | 2021-09-22 | 株式会社三英社製作所 | Power conversion circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3560597B2 (en) * | 2001-09-12 | 2004-09-02 | 松下電器産業株式会社 | Multi-output DC-DC converter |
| JP4252269B2 (en) * | 2002-08-29 | 2009-04-08 | パナソニック株式会社 | Multi-output DC-DC converter |
| JP4397617B2 (en) * | 2003-04-01 | 2010-01-13 | パナソニック株式会社 | Multi-output DC-DC converter |
| JP2005117886A (en) * | 2003-09-19 | 2005-04-28 | Matsushita Electric Ind Co Ltd | Multiple-output dc-dc converter |
| KR20060108617A (en) * | 2003-10-21 | 2006-10-18 | 코닌클리즈케 필립스 일렉트로닉스 엔.브이. | Voltage converter |
| JP2006149107A (en) * | 2004-11-19 | 2006-06-08 | Matsushita Electric Ind Co Ltd | Multi-output power supply circuit |
| CN1841898A (en) * | 2005-03-31 | 2006-10-04 | 三美电机株式会社 | Multi-output type DC/DC converter and its control method |
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2006
- 2006-12-13 JP JP2006335485A patent/JP2008148514A/en active Pending
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2007
- 2007-12-13 CN CN2007101957231A patent/CN101202504B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950541A (en) * | 2010-07-12 | 2011-01-19 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN101950541B (en) * | 2010-07-12 | 2013-03-27 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| US8912729B2 (en) | 2010-07-12 | 2014-12-16 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module and an LCD thereof |
| CN102340242A (en) * | 2010-07-20 | 2012-02-01 | 文科泰克控股公司 | DC/DC converter circuit and method for controlling DC/DC converter circuit |
| CN102751868A (en) * | 2011-07-07 | 2012-10-24 | 矽创电子股份有限公司 | Voltage converter |
| CN102751868B (en) * | 2011-07-07 | 2015-05-13 | 矽创电子股份有限公司 | Voltage converter |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008148514A (en) | 2008-06-26 |
| CN101202504B (en) | 2012-07-04 |
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