CN1504851A - Multichannel pulsewave width modulating converter with balanced current - Google Patents
Multichannel pulsewave width modulating converter with balanced current Download PDFInfo
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Abstract
A multiple channel pulse wave width modification converter having balanced current, comprising an error amplifier for comparing the reference voltage needed by the standard output with the average output voltage of the converter and for controlling the major conversion channels and a plurality of paralleling conversion channels, the major conversion channels are arranged to control the pulse wave width regulator and power switch from the output signal of the error amplifier to produce power supply output, while the paralleling conversion channels are used for correcting the output signal of the error amplifier, controlling the pulse wave width regulator and power switch, thus producing power supply output having balanced current.
Description
(1) technical field
The relevant a kind of power supply changeover device of the present invention is particularly relevant for a kind of hyperchannel pulse wave width modulation converter with balanced balanced current.
(2) background technology
Along with the demand of computer of new generation to high speed, high electric current, the electric current demand of the microprocessor (Microprocessor) of especially up-to-date PC (PC) has surpassed 60 amperes (A), so the current requirements of DC-DC converter is also more and more higher.Therefore, the framework of multichannel parallel converter just often is cited.Wherein, the multichannel converter of heterogeneous formula form more because the peptizaiton of current ripple (Ripple) of input and output, and can adopt less, more cheap filter capacitor.
The parallel converter of hyperchannel is to utilize several pulse wave width modulations with identical output voltage (Pulse-width Modulated) ALT-CH alternate channel, with its output terminal parallel connection, provides higher output current.In several passages,, make one or more passages can bear to disproportion higher load because inevasible a little asymmetric between each passage.What is more, if each passage is for having synchronous rectification (Synchronous rectified) form of suction (Sinking) and supply (Sourcing) current capacity, huge idle current, just may flow into the low passage of voltage from the high passage of voltage, cause extra power consumption, and the uneven work of the power component that causes each passage undertakes, thus power component specified tolerance specification just need be improved, thereby increased the cost of converter.And if be responsible for all loads by the passage of minority, and not only cause heat to concentrate, its life-span also can shorten, because the increase of working temperature, just the mean lifetime of assembly can reduce.Therefore, in the parallel converter of hyperchannel, must possess the system that each channel current of energy balance is arranged, each ALT-CH alternate channel all be worked under the same conditions, to avoid above-mentioned problem.
Known multichannel converter, for example, United States Patent (USP) the 6th, 285 discloses in No. 571, utilizes the preceding average voltage of inductance (Inductance) that detects each passage, with pulse wave width modulation device (the Pulse-width Modulator that adjusts each passage; PWM) work period (Duty Cycle), and then reduce the difference of average voltage before the inductance of each passage, to reduce the unbalanced electric current of each interchannel.Though this method can make the preceding error voltage of the inductance of each passage reduce, but because of the switching frequency of multichannel converter more drives increase, cause employed inductance numerical value that the trend of more driving minimizing is arranged, and its equivalent DC series induction by current resistance also more drives small, therefore as long as bias voltage (Offset) a little just can cause very big out-of-balance current.For example, the bias voltage of 15 millivolts (mV), the inductance DC current inductive reactance divided by 3 milliohms (milliohm) equals 5 amperes electric current, and it will be flowed to the passage of low-voltage by high-tension passage.
Another United States Patent (USP) the 6th, 278, the heterogeneous formula converter that is disclosed in No. 263, to detect the size of current of each passage, it is utilize channel current to flow through a voltage signal that induction by current resistance produces, obtaining to be proportional to the channel current signal of channel current sized passageways, and via with average behind the channel current signal plus of each passage, to obtain the average channel current signal.The current balance type loop, convenient channel current signal with each passage is the difference signal of average channel current signal therewith, revises the work period of each passage PWM, so that the current difference of each passage is dwindled.Though the method can effectively reduce the imbalance of channel current, because of its current balance type loop is to use the average channel current signal, therefore, when the service aisle number had change, the circuit of this part also need cooperate change.For example, converter ic (Converter IC) often is made in the control circuit of a plurality of passages on the same IC, selects the service aisle of right quantity to operate according to need by the user.
As shown in fig. 1, be the parallel direct current transducer of known hyperchannel, detect the signal value of the VISEN1 of the channel current size that obtains being proportional to this passage when current detector 110, again with the VISEN2 that current detector obtained of other passages and the signal of VISEN3, after adding circuit 102 additions, average in addition by ratio circuit 103 again, it obtains an average channel current signal.With a passage wherein is example, this average channel current signal compares with VISEN1 through subtraction circuit 104 again, obtain a difference signal, carry out suitable amplification in filtering through compensating circuit 105, the signal subtraction of being exported at subtraction circuit 106 and error amplifier 101 obtains once the error amplifier output signal of revising, in the input pulse wave width modulation device 107 and cooperate the input of a triangular wave, working cycle with power controlling switch 108, make the power supply output of the pulse wave form of acquisition, it exports load 111 to after inductance 109 and electric capacity 112 filtering and through current detector 110, provide load 111 required electric current.Aforesaid, the channel current size of each ALT-CH alternate channel is measured in known converter utilization, be benchmark again with mean value, adjust the channel current size of each passage, but when the service aisle quantity of required use changes, the circuit of this converter just need be revised its averaging circuit, could obtain suitable average channel current value.How can provide multichannel power supply changeover device, the simple and easy and effective passage that is dispensed to each parallel running that load current is average, real is the important developing direction of multichannel power supply changeover device.
(3) summary of the invention
In above-mentioned background of invention, because the electric current demand of new PC microprocessor increases day by day, so need to provide the converter of big electric current.How can provide multichannel power supply changeover device, simply and effectively with load current average be dispensed to each ALT-CH alternate channel, and can the needs when using adjust the quantity of ALT-CH alternate channel, provide important contribution to multichannel power supply changeover device.
One of purpose of the present invention provides a kind of converter with output current of each ALT-CH alternate channel of balance, with burning voltage output and each channel current output of balance.
Another object of the present invention provides a kind of not only can the use in the single phase poaer supply conversion, also can use the power supply changeover device with balanced balanced current function in the polyphase source conversion.
According to above-described purpose, the invention provides a kind of hyperchannel pulse wave width modulation converter with balanced balanced current, comprise an error amplifier, utilize the reference voltage of standard output to compare with the average output voltage of converter, output translator voltage differences signal is to control main ALT-CH alternate channel and a plurality of ALT-CH alternate channel in parallel.And main ALT-CH alternate channel is by main thoroughfare pulse wave width modulation device, the power cycle of control main thoroughfare power switch, produce the pulse wave power supply output of main thoroughfare, via main thoroughfare inductance and capacitor filtering, and by main thoroughfare induction by current resistance, deliver to power output end, and main thoroughfare differential circuit, be connected in the two ends of main thoroughfare induction by current resistance, both end voltage with this main thoroughfare induction by current resistance is input, obtains the main thoroughfare current signal that is directly proportional with the channel current size of this main ALT-CH alternate channel.And ALT-CH alternate channel in parallel is by second subtraction circuit, export second difference signal, give parallel port pulse wave width modulation device, produce parallel port pulse wave width modulation signal, with the work period of control parallel port power switch, produce parallel port pulse wave power supply, again through parallel port inductance and capacitor filtering, and, export power output end to by parallel port induction by current resistance.And parallel port differential circuit, this moment is from the voltage signal at parallel port induction by current resistance two ends, obtain the parallel port current signal that is directly proportional with the size of current of ALT-CH alternate channel in parallel, be sent to first subtraction circuit, the difference that compares parallel port current signal and main thoroughfare current signal, do suitable amplification and filtering through compensating circuit again, deliver to second subtraction circuit, control parallel port pulse wave width modulation device in order to revise by the transducer voltage difference signal of error amplifier output.Converter of the present invention not only can be the single-phase type converter, also can be heterogeneous formula converter, and each ALT-CH alternate channel in parallel, all has the function that needs unlatching or close according to using.
For clearer understanding purpose of the present invention, characteristics and advantage, preferred embodiment of the present invention is elaborated below in conjunction with accompanying drawing.
(4) description of drawings
Fig. 1 is known hyperchannel parallel port formula direct current transducer; And
Fig. 2 is the hyperchannel pulse wave width modulation converter with balanced balanced current of the present invention.
(5) embodiment
By in the background of invention as can be known, the electric current demand of up-to-date PC microprocessor has surpassed 60 amperes, so needs can provide the DC-DC converter of big electric current.The framework of hyperchannel converter in parallel is because the peptizaiton of the current ripple of input and output can adopt less, more cheap filter capacitor.But known converter is because inevasible asymmetrical voltage makes one or more passages can bear to disproportion load, form extra power consumption, make power component specified tolerance specification must be improved, thereby increased cost, and also can shorten its life-span.And, select the service aisle of right quantity to operate according to need by the user because converter IC often needs the control circuit of a plurality of passages is made on the same IC.And known channel current balanced loop, when the service aisle number had change, the essential cooperation of circuit changed.How can provide multichannel power supply changeover device, the simple and easy and effective passage that is dispensed to each parallel running that load current is average provides important contribution in fact to multichannel power supply changeover device.
Converter of the present invention is to utilize one group of main ALT-CH alternate channel and a plurality of ALT-CH alternate channel in parallel to constitute, wherein the output current of each ALT-CH alternate channel in parallel is all compared with the output current of main ALT-CH alternate channel, has identical output current to control the output current of each ALT-CH alternate channel in parallel, to make the ALT-CH alternate channel that reaches whole.Control whole output voltage via error amplifier again, and reach the purpose of burning voltage output and balanced balanced current, it not only can use in the single phase poaer supply conversion, also can use at polyphase source and change.Consult Fig. 2, be the hyperchannel pulse wave width modulation converter with balanced balanced current of the present invention as shown in FIG..Below will utilize the converter of the present invention of four ALT-CH alternate channels to be illustrated its principle of work with this preferred embodiment.The main ALT-CH alternate channel of converter of the present invention is by pulse wave width modulation device 201, power switch 205, inductance 209, electric capacity 231, induction by current resistance 213 and differential circuit 217 constitute, and its main work is by pulse wave width modulation device 201 comparator input signals and a standard triangular wave, produce the work period of control signal with power controlling switch 205, form power supply output pulse wave, through inductance 209 and electric capacity 231 filtering, export load 232 to again.Differential circuit 217 detects the voltage differences signal of the both sides of induction by current resistance 213, and acquisition one is proportional to the output signal VISEN1 of size of current.
Be example with single ALT-CH alternate channel in parallel again, it is by two subtraction circuits 221,222, compensating circuit 227, and pulse wave width modulation device 202, power switch 206, inductance 210, electric capacity 231, induction by current resistance 214 and differential circuit 218 constitute.ALT-CH alternate channel in parallel and main ALT-CH alternate channel different are that pulse wave width modulation device 202 and 201 resulting input signals are also inequality.Except the input of a standard triangular wave, input signal at main ALT-CH alternate channel, it is the input signal of directly being used as pulse wave width modulation device 201 by the difference signal that difference obtained that error amplifier 230 is relatively exported average voltage and reference voltage VREF, and at the input signal of the pulse wave width modulation device 202 of ALT-CH alternate channel in parallel, then be to subtract each other the difference value that is obtained through subtraction circuit 222 with VISEN1 by the signal VISEN2 of induction by current resistance 214 and the differential circuit 218 measured size of current that are proportional to this ALT-CH alternate channel in parallel that obtain, provide suitable amplification and filtering through a compensating circuit 227 again, deliver to subtraction circuit 221 and subtract each other the signal that is obtained with the difference signal that error amplifier 230 is exported.So this parallel port possesses the ability that can be subjected to the channel current difference signal to adjust the output current size is arranged, work as V
ISEN1＞V
ISEN2The time, this ALT-CH alternate channel in parallel will be revised the work period (Duty cycle) that increases pulse wave width modulation device 202, and the channel current of this parallel port is increased, and work as V
ISEN1＜V
ISEN2The time, will revise the work period that reduces pulse wave width modulation device 202, output current is reduced.Make the output current of each ALT-CH alternate channel in parallel and the output current of main ALT-CH alternate channel reach unanimity so see through circuit of the present invention, and reach the purpose of the output current of each passage of balance.In addition because error amplifier 230 is relatively exported the difference signal that difference obtained of average voltage and reference voltage, add when logical all in pulse wave width modulation device 201,202 input so that influence work period of its output signal, when average output voltage is lower than V
REFThe time, all output currents of each passage thereby be required to improve, this has improved whole output voltage, when average output voltage is higher than V
REFThe time, all output currents of each passage thereby be required to reduce, thus whole output voltage reduced.Identical, by pulse wave width modulation device 203,204, power switch 207,208, inductance 211,212, electric capacity 231, induction by current resistance 215,216, differential circuit 219,220, subtraction circuit 223,224,225,226 and two other ALT-CH alternate channel in parallel of being constituted of compensating circuit 228,229 also have identical functions and characteristic.So hyperchannel pulse wave width modulation converter with balanced balanced current of the present invention, be to have the function that regulated output voltage and balanced balanced current are provided, and because it does not need to use the signal of passage average current, with standard as balanced balanced current, so when output ALT-CH alternate channel number changes, for example by four ALT-CH alternate channels in the foregoing description, when changing into two ALT-CH alternate channels, the circuit of converter of the present invention, only need close wherein two ALT-CH alternate channels in parallel, do not need to revise or increase circuit, get final product work, use converter of the present invention to provide simple and easy and effective operating circuit reality.And because main ALT-CH alternate channel, need not subtraction circuit and compensating circuit, so also more known converter more reduces on the cost of integral body.
Hyperchannel pulse wave width modulation converter with balanced balanced current of the present invention, be to use induction by current resistance and differential circuit to obtain the signal that is directly proportional with the ALT-CH alternate channel electric current, and compare with the channel current signal of main ALT-CH alternate channel, with the work period of the PWM that adjusts passage, the electric current of each passage is reached unanimity, but it is the resistance of an actual polyphone that this induction by current resistance might not need, when it also can utilize the power switch conducting, electric current passes through the pressure drop of its conducting resistance and gets, differential circuit will obtain the size of channel current from the both sides of conducting resistance this moment, and power supply output pulse wave, through inductance and capacitor filtering, the output of formation direct supply, it does not break away from spirit of the present invention.
Understand as the person skilled in the art, the above only is preferred embodiment of the present invention, is not in order to limit claim of the present invention; All other do not break away from the equivalence of being finished under the disclosed spirit and changes or replacement, all should be included in the following claim institute limited range.
Claims (19)
1. hyperchannel pulse wave width modulation converter with balanced balanced current is characterized in that this converter comprises at least:
One power output end is the power supply output interface for this converter, and an average output voltage signal is provided;
One error amplifier is input with a reference voltage signal and this average output voltage signal, and relatively the difference of this reference voltage signal and this average output voltage signal produces transducer voltage difference signal output;
One main ALT-CH alternate channel is connected between this error amplifier and this power output end, is input with this transducer voltage difference signal, exports a main thoroughfare and outputs current to this power output end and export a main thoroughfare current signal; And
At least one ALT-CH alternate channel in parallel, be connected between this error amplifier and this power output end, this parallel connection ALT-CH alternate channel also connects this main ALT-CH alternate channel, to receive this main thoroughfare current signal, produce one first difference signal with this main thoroughfare current signal with the difference of the road current signal of UNICOM in the lump of this ALT-CH alternate channel in parallel, this first difference signal is subtracted each other generation one second difference signal with this transducer voltage difference signal again, adjust the road output current of UNICOM in the lump of this parallel connection ALT-CH alternate channel with this second difference signal, export this parallel port and output current to this power output end, and measure this parallel port output current to produce this parallel port current signal.
2. converter as claimed in claim 1 is characterized in that, described main ALT-CH alternate channel also comprises:
One pulse wave width modulation device is input with this transducer voltage difference signal, produces pulse wave width modulation signal output;
One power switch is connected in this pulse wave width modulation device, is input with this pulse wave width modulation signal, controls the work period of this power switch, to produce pulse wave power supply output;
One filter element comprises an inductance and an electric capacity, and this filter element is connected in this power switch, with this pulse wave power filter, forms this main thoroughfare output current;
One induction by current resistance is installed on the output current path of this main ALT-CH alternate channel; And
One differential circuit is connected in the two ends of this induction by current resistance, is input with the both end voltage of this induction by current resistance, this main thoroughfare current signal that obtains being directly proportional with this main thoroughfare output current.
3. converter as claimed in claim 2 is characterized in that described pulse wave width modulation device also comprises the input of a standard triangular wave.
4. converter as claimed in claim 2, it is characterized in that, described main ALT-CH alternate channel, comprise that also an a kind of conducting resistance of utilizing this power switch replaces the circuit of this induction by current resistance, wherein this differential circuit is connected in the two ends of this conducting resistance, obtain this main thoroughfare current signal, and this filter element with this pulse wave power filter after, form this main thoroughfare output current and export this power output end to.
5. converter as claimed in claim 1 is characterized in that, described ALT-CH alternate channel in parallel also comprises:
One second subtraction circuit is exported this second difference signal;
One pulse wave width modulation device connects this second subtraction circuit, is input with this second difference signal, produces pulse wave width modulation signal output;
One power switch is connected in this pulse wave width modulation device, is input with this pulse wave width modulation signal, controls the work period of this power switch, to produce pulse wave power supply output;
One filter element comprises an inductance and an electric capacity, and this filter element is connected in this power switch, with this pulse wave power filter, forms this parallel port output current;
One induction by current resistance is installed on the output current path of this parallel connection ALT-CH alternate channel;
One differential circuit is connected in the two ends of this induction by current resistance, is input with the both end voltage of this induction by current resistance, this parallel port current signal that obtains being directly proportional with this parallel port output current; And
One first subtraction circuit, connecting this differential circuit and this main ALT-CH alternate channel, is input with this parallel port current signal and this main thoroughfare current signal, relatively the difference of this parallel port current signal and this main thoroughfare current signal, export this first difference signal
This second subtraction circuit wherein is to be input with this first difference signal and this transducer voltage difference signal, this second difference signal of output behind the comparing difference.
6. converter as claimed in claim 5 is characterized in that described pulse wave width modulation device also comprises the input of a standard triangular wave.
7. converter as claimed in claim 5, it is characterized in that, described ALT-CH alternate channel in parallel, comprise that also an a kind of conducting resistance of utilizing this power switch replaces the circuit of this induction by current resistance, this differential circuit wherein is connected in the two ends of this conducting resistance, obtains this parallel port current signal, and this filter element with this pulse wave power filter after, form this parallel port output current and export this power output end to.
8. converter as claimed in claim 5, it is characterized in that, described ALT-CH alternate channel in parallel also comprises, one compensating circuit is in order to provide the function of amplification and filtering, between this first subtraction circuit and this second subtraction circuit, with this first difference signal is input, produces a compensation back first difference signal, exports this second subtraction circuit to.
9. converter as claimed in claim 1 is characterized in that, described reference voltage signal is the voltage request for this converter output.
10. converter as claimed in claim 1 is characterized in that, described converter is a single-phase type or heterogeneous formula converter.
11. converter as claimed in claim 1 is characterized in that, described ALT-CH alternate channel in parallel has the function that needs unlatching or close according to using.
12. the hyperchannel pulse wave width modulation converter with balanced balanced current, this converter comprises at least:
One power output end is the power supply output interface for this converter, and an average output voltage signal is provided;
One error amplifier is input with a reference voltage signal and this average output voltage signal, and relatively the difference of this reference voltage signal and this average output voltage signal produces transducer voltage difference signal output;
One main ALT-CH alternate channel is connected between this error amplifier and this power output end, and this main ALT-CH alternate channel comprises
One main thoroughfare pulse wave width modulation device is input with this transducer voltage difference signal, produces a main thoroughfare pulse wave width modulation signal output,
One main thoroughfare power switch is connected in this main thoroughfare pulse wave width modulation device, is input with this main thoroughfare pulse wave width modulation signal, controls the work period of this main thoroughfare power switch, export to produce a main thoroughfare pulse wave power supply,
One main thoroughfare filter element comprises a main thoroughfare inductance and a main thoroughfare electric capacity, is connected in this main thoroughfare power switch, with this main thoroughfare pulse wave power filter, forms a main ALT-CH alternate channel output current,
One main thoroughfare induction by current resistance is installed on the output current path of this main ALT-CH alternate channel, and
One main thoroughfare differential circuit is connected in the two ends of this main thoroughfare induction by current resistance, is input with the both end voltage of this main thoroughfare induction by current resistance, a main thoroughfare current signal that obtains being directly proportional with this main thoroughfare output current; And
At least one ALT-CH alternate channel in parallel, be connected between this error amplifier and this power output end, this parallel connection ALT-CH alternate channel also connects this main ALT-CH alternate channel, to receive this main thoroughfare current signal, produce one first difference signal with this main thoroughfare current signal with the difference of the road current signal of UNICOM in the lump of this ALT-CH alternate channel in parallel, this first difference signal is subtracted each other generation one second difference signal with this transducer voltage difference signal again, adjust the road output current of UNICOM in the lump of this parallel connection ALT-CH alternate channel with this second difference signal, and export this power output end to, measure this parallel port output current to produce this parallel port current signal, feed back this parallel port current signal to this parallel connection ALT-CH alternate channel, each should comprise by the parallel connection ALT-CH alternate channel:
One second subtraction circuit is exported this second difference signal;
Pulse bandwidth modulator in UNICOM road connects this second subtraction circuit in the lump, is input with this second difference signal, produces UNICOM road pulse bandwidth modulating signal output in the lump;
UNICOM road power switch is connected in this parallel port pulse wave width modulation device in the lump, is input with this parallel port pulse wave width modulation signal, controls the work period of this parallel port power switch, produces UNICOM road pulse wave power supply output in the lump;
UNICOM road filter element in the lump, be by UNICOM road inductance in the lump and and in the lump UNICOM road electric capacity constituted, be connected in this parallel port power switch, with this parallel port pulse wave power filter, form this parallel port output current;
Induction by current resistance in UNICOM road is installed on the output current path of this parallel connection ALT-CH alternate channel in the lump;
UNICOM road differential circuit in the lump is connected in the two ends of this parallel port induction by current resistance, is input with the both end voltage of this parallel port induction by current resistance, obtains the road current signal of UNICOM in the lump that is directly proportional with this parallel port output current;
One first subtraction circuit, connecting this parallel port differential circuit and this main thoroughfare differential circuit, is input with this parallel port current signal and this main thoroughfare current signal, relatively the difference of this parallel port current signal and this main thoroughfare current signal, export this first difference signal, and
One compensating circuit, in order to the function of amplification and filtering to be provided, this compensating circuit connects this first subtraction circuit, is input with this first difference signal, produces compensating signal output;
This second subtraction circuit wherein is to be input with this compensating signal and this transducer voltage difference signal, this second difference signal of output behind the comparing difference.
13. converter as claimed in claim 13 is characterized in that, described reference voltage signal is the voltage request for this converter output.
14. converter as claimed in claim 13 is characterized in that, described main thoroughfare pulse wave width modulation device also comprises the input of a standard triangular wave.
15. converter as claimed in claim 13 is characterized in that, described parallel port pulse wave width modulation device also comprises the input of a standard triangular wave.
16. converter as claimed in claim 13, it is characterized in that, described main ALT-CH alternate channel, comprise that also an a kind of main thoroughfare conducting resistance of utilizing this main thoroughfare power switch replaces the circuit of this main thoroughfare induction by current resistance, this main thoroughfare differential circuit wherein, be connected in the two ends of this main thoroughfare conducting resistance, obtain this main thoroughfare current signal, and this main thoroughfare filter element, behind this main thoroughfare pulse wave power filter, form this main thoroughfare output current, export this power output end to.
17. converter as claimed in claim 13, it is characterized in that, described ALT-CH alternate channel in parallel, comprise that also a kind of road conducting resistance of UNICOM in the lump of utilizing this parallel port power switch replaces the circuit of this parallel port induction by current resistance, this parallel port differential circuit wherein, be connected in the two ends of this parallel port conducting resistance, obtain this parallel port current signal, and this parallel port filter element, behind this parallel port pulse wave power filter, form this parallel port output current, export this power output end to.
18. converter as claimed in claim 13 is characterized in that, described converter is a single-phase type or heterogeneous formula converter.
19. converter as claimed in claim 13 is characterized in that, described ALT-CH alternate channel in parallel has the function that needs unlatching or close according to using.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021526478A CN100419614C (en) | 2002-11-28 | 2002-11-28 | Multichannel pulsewave width modulating converter with balanced current |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021526478A CN100419614C (en) | 2002-11-28 | 2002-11-28 | Multichannel pulsewave width modulating converter with balanced current |
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| CN1504851A true CN1504851A (en) | 2004-06-16 |
| CN100419614C CN100419614C (en) | 2008-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021526478A Expired - Fee Related CN100419614C (en) | 2002-11-28 | 2002-11-28 | Multichannel pulsewave width modulating converter with balanced current |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372207C (en) * | 2005-06-07 | 2008-02-27 | 台达电子工业股份有限公司 | Parallel power supply combined with active dropout current sharing circuit |
| CN100423424C (en) * | 2005-01-19 | 2008-10-01 | 富士通株式会社 | Multiphase DC-DC converter |
| CN1976190B (en) * | 2005-11-28 | 2011-05-11 | 半导体元件工业有限责任公司 | Multi-phase power supply controller and method therefor |
| WO2015106681A1 (en) * | 2014-01-14 | 2015-07-23 | Mediatek Inc. | Voltage converter |
| CN107749714A (en) * | 2017-10-24 | 2018-03-02 | 北京科诺伟业科技股份有限公司 | A kind of three-phase crisscross parallel two-way DC converter current-sharing control method |
| CN109154851A (en) * | 2016-05-19 | 2019-01-04 | 高通股份有限公司 | power supply with feedback |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6052607B2 (en) * | 1979-05-10 | 1985-11-20 | ヤマハ株式会社 | amplifier |
| CN2296593Y (en) * | 1996-04-22 | 1998-11-04 | 张朝铭 | Intelligent no power-off device |
| US6278263B1 (en) * | 1999-09-01 | 2001-08-21 | Intersil Corporation | Multi-phase converter with balanced currents |
| JP2001078466A (en) * | 1999-09-09 | 2001-03-23 | Mitsubishi Heavy Ind Ltd | Voltage-type pwm inverter and method for converting electric power |
| US6285571B1 (en) * | 2000-03-03 | 2001-09-04 | Linfinity Microelectronics | Method and apparatus for an efficient multiphase switching regulator |
| CN2475211Y (en) * | 2001-02-16 | 2002-01-30 | 亚力电机股份有限公司 | Over-current protector |
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- 2002-11-28 CN CNB021526478A patent/CN100419614C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100423424C (en) * | 2005-01-19 | 2008-10-01 | 富士通株式会社 | Multiphase DC-DC converter |
| CN100372207C (en) * | 2005-06-07 | 2008-02-27 | 台达电子工业股份有限公司 | Parallel power supply combined with active dropout current sharing circuit |
| CN1976190B (en) * | 2005-11-28 | 2011-05-11 | 半导体元件工业有限责任公司 | Multi-phase power supply controller and method therefor |
| WO2015106681A1 (en) * | 2014-01-14 | 2015-07-23 | Mediatek Inc. | Voltage converter |
| US9735681B2 (en) | 2014-01-14 | 2017-08-15 | Mediatek Inc. | Voltage converter |
| CN109154851A (en) * | 2016-05-19 | 2019-01-04 | 高通股份有限公司 | power supply with feedback |
| CN107749714A (en) * | 2017-10-24 | 2018-03-02 | 北京科诺伟业科技股份有限公司 | A kind of three-phase crisscross parallel two-way DC converter current-sharing control method |
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| Publication number | Publication date |
|---|---|
| CN100419614C (en) | 2008-09-17 |
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