CN1841907A - Polyphase power supply converter - Google Patents
Polyphase power supply converter Download PDFInfo
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- CN1841907A CN1841907A CN 200510062489 CN200510062489A CN1841907A CN 1841907 A CN1841907 A CN 1841907A CN 200510062489 CN200510062489 CN 200510062489 CN 200510062489 A CN200510062489 A CN 200510062489A CN 1841907 A CN1841907 A CN 1841907A
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Abstract
The invention relates to a multi-phase power converser which comprises a phase control circuit and a plurality of synchronous rectifying hypertension channels, wherein the phase control circuit outputs a plurality of PWM signals to the synchronous rectifying hypertension channels so that it can provide the power needed by the load; the phase control circuit comprises an error amplifier used to compare the reference voltage with the voltage aiming size of the power and output the corresponding error voltage signal, a PWM amplifier used to compare the error voltage signal with the voltage aiming size of the triangle wave signal and output the corresponding aiming PWM signal, a phase converser used to input the aiming PWM signal and dose phase conversing and output the delay PWM signal, wherein the aiming PWM signal and the delay signal are as complex PWM signal.
Description
Technical field
The invention relates to a kind of multi-phase power supply inverter.
Background technology
In the application of computer because the operating voltage of electronic component is to be direct current, so need to use power supply changeover device with the direct current (for example: 12 volts) with the accurate position of high voltage be converted to accurate of low-voltage on make voltage (for example: 1.525 volts).Owing to part electronic components such as for example central processing unit need consume a large amount of electric power, and, generally be to use the three phase mains transducer to provide this central processing unit required electric power in order to reduce the manufacturing cost of motherboard.The three phase mains transducer is except having preferable radiating effect and reduce output/input current and the ripple of voltage, and can improve frequency range and reduce the use amount of Da Rong value electric capacity, reaches to reduce power supply changeover device and take up space.
Yet, use the three phase mains transducer with the time as the power supply unit of central processing unit, it may suffer following shortcoming: if three current channels on make voltage and when inconsistent, to provide most electric current by current channel with maximum operating voltage, the three phase mains transducer is damaged, more can cause the power consumption that exceeds the quata.For avoiding the problems referred to above, in United States Patent (USP) notification number US RE38,454E, denomination of invention: Multi-phase converter with balancedcurrents, disclose a kind of four-way multi-phase power supply inverter 10, as shown in Figure 1, four-way multi-phase power supply inverter 10 has control circuit 14 and four synchronous rectification buck channel (synchronous-rectified buck channel) 18a-d, control circuit 14 is exported independently pulse wave length modulation (PWM) signal respectively to synchronous rectification buck channel 18a-d, to adjust the magnitude of current that synchronous rectification buck channel 18a-d is provided, so that provide load 12 (for example: required electric power central processing unit), and have the current balance type function.Yet, as shown in Figure 2, control circuit 14 has wrong amplifier, complex adder, divider, plural compensating circuit, reaches plural PWM amplifier, not only internal circuit complexity, and the effect of its current balance type no all roses, still can't overcome the shortcoming of known three phase mains transducer.
Summary of the invention
For avoiding the shortcoming of known three phase mains transducer, the objective of the invention is to, disclose a kind of multi-phase power supply inverter, it has the little and simple advantage of circuit structure of power consumption.
A kind of phase converter of the present invention is in order to importing a benchmark pwm signal, and after carrying out a phase transition, postpones pwm signal to export one, it is characterized in that this phase converter comprises:
One frequency generator is to produce a high-frequency signal;
One-period sampler, be according to this high-frequency signal counting the cycle of this benchmark pwm signal, and output one-period number of samples;
One buffer is to store a delay data; And
One control unit is with after this benchmark pwm signal is carried out this phase transition, to export this delay pwm signal according to this periodic sampling number and this delay data.
Wherein, this delay data is to be a phase value.
A kind of phase-control circuit of the present invention, be according to a feedback voltage to export a benchmark pwm signal and complex delay pwm signal, it is characterized in that this phase-control circuit comprises:
One wrong amplifier is in order to comparing the voltage quasi position of a reference voltage and this feedback voltage, and exports the wrong voltage signal of a correspondence;
One PWM amplifier is in order to comparing the voltage quasi position of this a wrong voltage signal and a triangular signal, and exports this benchmark pwm signal; And
The plural number phase converter is that this benchmark pwm signal is carried out phase transition, postpones pwm signal to export these respectively.
Wherein, each these phase converter also comprises:
One frequency generator is to produce a high-frequency signal;
One-period sampler, be according to this high-frequency signal counting the cycle of this benchmark pwm signal, and output one-period number of samples;
One buffer is to store a delay data; And
One control unit is with after this benchmark pwm signal is carried out this phase transition, to export this delay pwm signal according to this periodic sampling number and this delay data.
Wherein, this delay data is to be a phase value.
A kind of multi-phase power supply inverter of the present invention, it comprises a phase-control circuit and plural synchronous rectification buck channel, this phase-control circuit is exported plural pwm signal respectively to these synchronous rectification buck channel, make these synchronous rectification buck channel provide a load a required electric power, it is characterized in that this phase-control circuit comprises:
One wrong amplifier is the size in order to the voltage quasi position of comparing a reference voltage and this electric power, and exports a corresponding wrong voltage signal;
One PWM amplifier is the size in order to the voltage quasi position of comparing this a wrong voltage signal and a triangular signal, and exports a corresponding benchmark pwm signal;
One phase converter is in order to importing this benchmark pwm signal, and after carrying out a phase transition, output one postpones pwm signal, and wherein, this benchmark pwm signal and this delay pwm signal are as these pwm signals.
Wherein, this phase converter is to comprise:
One frequency generator is to produce a high-frequency signal;
One-period sampler, be according to this high-frequency signal counting the cycle of this benchmark pwm signal, and output one-period number of samples;
One buffer is to store a delay data; And
One control unit is with after this benchmark pwm signal is carried out this phase transition, to export this delay pwm signal according to this periodic sampling number and this delay data.
Wherein, this delay data is to be a phase value.
Wherein, this load is to be a central processing unit.
Description of drawings
For further specifying concrete technology contents of the present invention, below in conjunction with embodiment and accompanying drawing describes in detail as after, wherein:
Fig. 1 is the functional block diagram of known four-way polyphase voltage converter.
Fig. 2 is the functional block diagram of known control circuit.
Fig. 3 is the functional block diagram of multi-phase power supply inverter of the present invention.
Fig. 4 is the functional block diagram of phase-control circuit of the present invention.
Fig. 5 is the functional block diagram of phase converter.
Fig. 6 is the sequential chart of the pwm signal exported of phase-control circuit of the present invention.
Embodiment
Multi-phase power supply inverter of the present invention is output one a benchmark pwm signal, and by the technology of phase transition, produce the complex delay pwm signal of the pairing out of phase of this benchmark pwm signal again, to export plural synchronous rectification buck channel respectively to, to control the magnitude of current that plural synchronous rectification buck channel is provided.Because all postpone pwm signal and all stem from this benchmark pwm signal, difference on the phase place is only arranged, therefore, the magnitude of current that each synchronous rectification buck channel is provided is for identical, so can overcome the shortcoming of known three phase mains transducer and known four-way multi-phase power supply inverter.
In this embodiment, multi-phase power supply inverter of the present invention is to be four phase power supply changeover devices, but the number of phases that multi-phase power supply inverter of the present invention provided is to decide according to user's actual demand, but not as limit.As shown in Figure 3, the present invention's four phase power supply changeover devices 20 are similar to the structure of known four-way multi-phase power supply inverter 10, it does not exist together is to substitute known control circuit 14 with phase-control circuit 24 of the present invention, and adjust the magnitude of current that synchronous rectification buck channel 18a-d are provided with phase-control circuit of the present invention 24, to provide load 12 (for example: required electric power central processing unit).As shown in Figure 4, phase-control circuit 24 of the present invention is to comprise: mistake amplifier 26, PWM amplifier 28, phase converter 30,32 and 34, wherein, phase converter 30,32 and 34 is to be the identical electronic component of circuit.Mistake amplifier 26 is in order to comparison reference voltage REF and feedback voltage V
OUTThe size of both voltage quasi positions is if reference voltage REF is greater than feedback voltage V
OUTThen wrong amplifier 26 is wrong voltage signals of the accurate position of output HIGH voltage; If reference voltage REF be less than/equal feedback voltage V
OUTThen wrong amplifier 26 is wrong voltage signals of the accurate position of output LOW voltage.Wherein, the wrong voltage signal is the positive input terminal that inputs to PWM amplifier 28, triangular signal is the negative input end that inputs to PWM amplifier 28, PWM amplifier 28 is the sizes in order to comparison wrong voltage signal and both voltage quasi positions of triangular signal, and PWM amplifier 28 is first pulse wave length modulating signal PWM1 of the accurate position of output HIGH voltage if the wrong voltage signal is greater than triangular signal; If the wrong voltage signal be less than/equal triangular signal then the first pulse wave length modulating signal PWM1 of the PWM amplifier 28 accurate position that is output LOW voltages.Phase converter 30, phase converter 32, and phase converter 34 be to postpone first pulse wave length modulating signal PWM1 to four/one, 2/4ths, and cycle time of 3/4ths respectively, or postpone the phase places that 270 degree are spent, reached to 90 degree, 180, to export the second pulse wave length modulating signal PWM2, the 3rd pulse wave length modulating signal PWM3, to reach the 4th pulse wave length modulating signal PWM4.By in above-mentioned as can be known, the first pulse wave length modulating signal PWM1, the second pulse wave length modulating signal PWM2, the 3rd pulse wave length modulating signal PWM3, and the 4th pulse wave length modulating signal PWM4 difference on the phase place is only arranged each other, all the other characteristic electrons are all similar.
As shown in Figure 5, phase converter 30 comprises: periodic sampling device 40, frequency generator 42, controller 44, and buffer 46 form.Wherein, buffer 46 is to store the delay data, be phase converter 30 should postpone phase value (for example: 90 degree), periodic quantity (for example: 1/4th) or time value (for example: 100uS), frequency generator 42 is in order to produce high-frequency signal, for example: the high-frequency signal of 100KHz, and the output high-frequency signal is to periodic sampling device 40.Periodic sampling device 40 is in order to the cycle of the first pulse wave length modulating signal PWM1 is taken a sample, and output periodic sampling number is to controller 44, and the assumption period number of samples is 16.Controller 44 reads the stored delay data of buffer 46, and calculate the first pulse wave length modulating signal PWM1 time that should postpone, for example: 4 periodic sampling numbers, then in 4 periodic sampling numbers after pairing time of delay, again the first pulse wave length modulating signal PWM1 is exported and become the second pulse wave length modulating signal PWM2.Wherein the function mode of phase converter 32 and phase converter 34 is to above-mentioned similar, and it does not exist together and only is the delay data that buffer 46 is stored, so explain no longer in detail.Thus, can learn the first pulse wave length modulating signal PWM1, the second pulse wave length modulating signal PWM2, the 3rd pulse wave length modulating signal PWM3, and the sequential chart of the 4th pulse wave length modulating signal PWM4, as shown in Figure 6.
Because the cycle of the first pulse wave length modulating signal PWM1 is for fixing, and four phase power supply changeover devices 20 will be adjusted the ratio of the duty cycle (duty cyclc) of the first pulse wave length modulating signal PWM1 along with the difference of load, and phase converter 30, phase converter 32, and phase converter 34 only postpone the first pulse wave length modulating signal PWM1 respectively, so the magnitude of current that each synchronous rectification buck channel 18a-d is provided is equal, so can overcome the shortcoming of known four-way multi-phase power supply inverter 10.In addition, well imagine ground, multi-phase power supply inverter of the present invention also can be multi-phase power supply inverters such as three phase mains transducer or six phase power supply changeover devices, the user only need change the purpose that buffer 46 stored delay data can reach polyphase source conversion, so do not exceed with the power supply changeover device of four phases.
The foregoing description only is to give an example for convenience of description, and the interest field that the present invention advocated should be as the criterion so that claim is described certainly, but not only limits to the foregoing description.
Claims (9)
1. phase converter is in order to importing a benchmark pwm signal, and after carrying out a phase transition, postpones pwm signal to export one, it is characterized in that this phase converter comprises:
One frequency generator is to produce a high-frequency signal;
One-period sampler, be according to this high-frequency signal counting the cycle of this benchmark pwm signal, and output one-period number of samples;
One buffer is to store a delay data; And
One control unit is with after this benchmark pwm signal is carried out this phase transition, to export this delay pwm signal according to this periodic sampling number and this delay data.
2. phase converter as claimed in claim 1 is characterized in that, wherein, this delay data is to be a phase value.
3. phase-control circuit, be according to a feedback voltage to export a benchmark pwm signal and complex delay pwm signal, it is characterized in that this phase-control circuit comprises:
One wrong amplifier is in order to comparing the voltage quasi position of a reference voltage and this feedback voltage, and exports the wrong voltage signal of a correspondence;
One PWM amplifier is in order to comparing the voltage quasi position of this a wrong voltage signal and a triangular signal, and exports this benchmark pwm signal; And
The plural number phase converter is that this benchmark pwm signal is carried out phase transition, postpones pwm signal to export these respectively.
4. phase-control circuit as claimed in claim 3 is characterized in that, wherein, each these phase converter also comprises:
One frequency generator is to produce a high-frequency signal;
One-period sampler, be according to this high-frequency signal counting the cycle of this benchmark pwm signal, and output one-period number of samples;
One buffer is to store a delay data; And
One control unit is with after this benchmark pwm signal is carried out this phase transition, to export this delay pwm signal according to this periodic sampling number and this delay data.
5. phase converter as claimed in claim 4 is characterized in that, wherein, this delay data is to be a phase value.
6. multi-phase power supply inverter, it comprises a phase-control circuit and plural synchronous rectification buck channel, this phase-control circuit is exported plural pwm signal respectively to these synchronous rectification buck channel, make these synchronous rectification buck channel provide a load a required electric power, it is characterized in that this phase-control circuit comprises:
One wrong amplifier is the size in order to the voltage quasi position of comparing a reference voltage and this electric power, and exports a corresponding wrong voltage signal;
One PWM amplifier is the size in order to the voltage quasi position of comparing this a wrong voltage signal and a triangular signal, and exports a corresponding benchmark pwm signal;
One phase converter is in order to importing this benchmark pwm signal, and after carrying out a phase transition, output one postpones pwm signal, and wherein, this benchmark pwm signal and this delay pwm signal are as these pwm signals.
7. multi-phase power supply inverter as claimed in claim 6 is characterized in that, wherein, this phase converter is to comprise:
One frequency generator is to produce a high-frequency signal;
One-period sampler, be according to this high-frequency signal counting the cycle of this benchmark pwm signal, and output one-period number of samples;
One buffer is to store a delay data; And
One control unit is with after this benchmark pwm signal is carried out this phase transition, to export this delay pwm signal according to this periodic sampling number and this delay data.
8. phase converter as claimed in claim 7 is characterized in that, wherein, this delay data is to be a phase value.
9. phase converter as claimed in claim 6 is characterized in that, wherein, this load is to be a central processing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510062489 CN1841907A (en) | 2005-03-29 | 2005-03-29 | Polyphase power supply converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510062489 CN1841907A (en) | 2005-03-29 | 2005-03-29 | Polyphase power supply converter |
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| CN1841907A true CN1841907A (en) | 2006-10-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578785A (en) * | 2009-06-16 | 2015-04-29 | 英特赛尔美国股份有限公司 | Way out of balance (WOB) current correction for use with multi-phase DC-DC converter |
| CN107465404A (en) * | 2016-06-02 | 2017-12-12 | 三星电机株式会社 | Polyphase source and the method to being calibrated for the sawtooth signal of single comparator |
| CN112737334A (en) * | 2020-12-29 | 2021-04-30 | 思瑞浦微电子科技（苏州）股份有限公司 | Multiphase DCDC control system and multiphase DCDC conversion circuit |
| CN113302827A (en) * | 2019-04-18 | 2021-08-24 | 华为技术有限公司 | Multiphase signal control circuit and method |
-
2005
- 2005-03-29 CN CN 200510062489 patent/CN1841907A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578785A (en) * | 2009-06-16 | 2015-04-29 | 英特赛尔美国股份有限公司 | Way out of balance (WOB) current correction for use with multi-phase DC-DC converter |
| CN104578785B (en) * | 2009-06-16 | 2018-02-13 | 英特赛尔美国股份有限公司 | Extraordinary unbalance (WOB) current correction used for multiphase DC DC converters |
| CN107465404A (en) * | 2016-06-02 | 2017-12-12 | 三星电机株式会社 | Polyphase source and the method to being calibrated for the sawtooth signal of single comparator |
| CN113302827A (en) * | 2019-04-18 | 2021-08-24 | 华为技术有限公司 | Multiphase signal control circuit and method |
| US11558042B2 (en) | 2019-04-18 | 2023-01-17 | Huawei Technologies Co., Ltd. | Multi-phase signal control circuit and method |
| CN113302827B (en) * | 2019-04-18 | 2023-03-03 | 华为技术有限公司 | Multiphase signal control circuit and method |
| CN112737334A (en) * | 2020-12-29 | 2021-04-30 | 思瑞浦微电子科技（苏州）股份有限公司 | Multiphase DCDC control system and multiphase DCDC conversion circuit |
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Open date: 20061004 |