CN1988342A

CN1988342A - Multiple phase DC-to-DC power converter with extending circuit

Info

Publication number: CN1988342A
Application number: CN200510132049.3A
Authority: CN
Inventors: 廖哲贤
Original assignee: Giga Byte Technology Co Ltd
Current assignee: Giga Byte Technology Co Ltd
Priority date: 2005-12-01
Filing date: 2005-12-21
Publication date: 2007-06-27
Anticipated expiration: 2025-12-21
Also published as: TW200723657A; TWI307206B; CN100517929C

Abstract

This invention relates to a multi-phase DC to DC supply converter with an expansion circuit including a primary module and an expansion module, in which, the primary module includes an n phase PWM control circuit and n output stage circuits, which regulate an input supply to an output supply controlled by the n phase PWM control circiuits, said expansion module includes n expansion circuits parallel to the output stage circuits one to one, and the expansion circuits and the parallel output stage circuits share the current input by the input supply controlled by the n phase PWM control circuit.

Description

The multiple phase DC-to-DC power converter of tool extension circuit

Technical field

The present invention relates to the technology of multiple phase DC-to-DC power converter aspect.

Background technology

Along with the trend that central processing unit (CPU) arithmetic speed day by day promotes, the needed electric current of this central processing unit is also more and more big.For meeting this demand, give the design of the core power circuit of this central processing unit at present for power supply, adopt the DC-to-DC power converter of heterogeneous formula usually, its basic framework is approximately as shown in Figure 2.

What show in Fig. 2 is a kind of DC-to-DC power converter of four phases, it comprises one or four phase PWM controllers 9, four drivers 8 connect this four phase PWM controller 9, four output-stage circuits 7 connect those drivers 8 respectively one to one, one input 70 connects aforesaid each output-stage circuit 7 for introducing an input power supply Vin, one output 71 connects aforesaid each output-stage circuit 7 and is supplied to a load for drawing an out-put supply Vout, be CPU6, and a voltage monitor 5 bridge joints this output 71 with this four mutually PWM controller 9 between.Wherein, each output-stage circuit 7 comprises that all a high speed diverter switch that is composed in series by a high side electronic switch (mosfet transistor) and a downside electronic switch (mosfet transistor) is to 72, one choke coil, 73 1 ends connect this high speed diverter switch to 72 series connection point, one resistor, 74 1 ends connect the other end of this choke coil 73, and a capacitor 75 1 ends connect the other end of this resistor 74, other end ground connection.

The DC-to-DC power converter of this four phases, mainly be to utilize this four phase PWM controller 9 to order about the running that each driver 8 is controlled each output-stage circuit 7, so that this input power supply Vin is adjusted to this out-put supply Vout that meets this CPU6 demand by each output-stage circuit 7.In more detail, this out-put supply Vout except power supply give this CPU6 make its keep normal operation, and, make this four phase PWM controller 9 import corresponding driver 8 respectively according to the pwm control signal of four outs of phase of magnitude of voltage generation of this out-put supply Vout by feed back to this four phase PWM controller 9 by this voltage monitor 5.Each driver 8 produces a corresponding switching control signal according to receiving pwm control signal respectively and imports corresponding high speed diverter switch respectively to 72, make each high speed diverter switch under the control of the switch-over control signal that is received, carry out the breakdown action in turn of high speed to 72 high and low side electronic switch, utilize opening in turn of this high and low side electronic switch, make that this input power supply Vin can be by this choke coil 73 and 75 chargings of 74 pairs of these capacitors of this resistor, to form this out-put supply Vout.Because arbitrary time point has all wherein that an output-stage circuit 7 operates as before, therefore, this out-put supply Vout stably maintains on the current potential that meets these CPU 6 demands always.

In Taiwan I233996, I232630, I228860, I232022,591867,595077, No. 538586 patent cases and the prior art quoted thereof, also disclose the framework that identical or similar above-mentioned DC-to-DC power converter are arranged.In any case these prior arts not instruction make the bigger electric current of this DC-to-DC power converter supply how under the condition of the number of phases that does not increase DC-to-DC power converter.More detailed it, in case determine the number of phases of this DC-to-DC power converter, also supply with the maximum current of this load and can't improve again with regard to decision.

Summary of the invention

The present invention is a kind of multiple phase DC-to-DC power converter of tool extension circuit, and it comprises a main modular and an enlargement module, and this main modular comprises a n phase pwm control circuit and n output-stage circuit.This enlargement module comprises that n extension circuit is those output-stage circuits in parallel one to one.Wherein:

Those output-stage circuits are under the control of this n phase pwm control circuit an input power supply to be adjusted to an out-put supply that meets a loading demand.

Each extension circuit only is made of an electronic switch, or an electronic switch institute is made of, or fully identical with the output-stage circuit that is in parallel.

In any case, because therefore each extension circuit and the output-stage circuit that is in parallel all can, will be shared by each extension circuit and the output-stage circuit that is in parallel from the electric current that this input power supply is imported jointly at this n synchronous operation under the control of pwm control circuit mutually.This means, does not have the situation of extension circuit with respect to the past, each extension circuit and the output-stage circuit that the is in parallel bigger electric current of can loading jointly.Therefore, when this load need be supplied bigger electric current,, do not need to increase the number of phases fully as long as promote the electric current that this input power supply is imported.

Description of drawings

Fig. 1 is the calcspar that shows preferred embodiment of the present invention.

Fig. 2 is the calcspar that shows the DC-to-DC power converter of prior art.

Embodiment

In Fig. 1 the calcspar that shows a kind of multiple phase DC-to-DC power converter of tool extension circuit, in order to technology contents of the present invention and demand benefit to be described.More detailed it, the multiple phase DC-to-DC power converter of this tool extension circuit comprises a main modular 1 and an enlargement module 2.This main modular 1 comprises a n phase pwm control circuit 10, and n output-stage circuit 11.This n phase pwm control circuit 10 comprises a n phase PWM controller 101, a n driver 102, reaches a voltage monitor 103, only this partly structure and operating principle be with the described four phase PWM controllers 9 of prior art, driver 8, and voltage monitor 5 identical, hold and do not give unnecessary details.

In any case, those output-stage circuits 11 are to connect this n phase pwm control circuit 10 respectively, just an output-stage circuit 11 connects a driver 102, and under the control of this n phase pwm control circuit 10, just under the control of those drivers 102, an input power supply Vin is adjusted to an out-put supply Vout who meets a CPU3 demand.

This enlargement module 2 comprises n extension circuit 20, their those output-stage circuits 11 in parallel one to one.Those extension circuits 20 are under the control of this n phase pwm control circuit 10, just under the control of those drivers 102, with the output-stage circuit that is in parallel share the electric current that this input power supply Vin is imported jointly.

Because the structure and the operating principle of each output-stage circuit 11 are entirely identical to the described output-stage circuit 7 of prior art, that is, it is right that each output-stage circuit 11 includes a high speed diverter switch that is composed in series by a high side electronic switch and a downside electronic switch, one end of one choke coil connects the serial connection point of this high and low side electronic switch, one end of one resistor connects the other end of this choke coil, and an end ground connection of a capacitor, the other end connects the other end of this resistor.Therefore, the concrete formation of each extension circuit 20 can be any one of described several embodiment subsequently.

First embodiment is that each extension circuit 20 only is made of an electronic switch, and this electronic switch is parallel to the high side electronic switch of corresponding output-stage circuit 11.

Second embodiment is that each extension circuit 20 only is made of an electronic switch, and only this electronic switch is parallel to the downside electronic switch of corresponding output-stage circuit 11.

It is right that the 3rd embodiment is that each extension circuit 20 is formed an electronic switch by two electronic switches, and this electronic switch is right to the high speed diverter switch that is parallel to corresponding output-stage circuit 11, and it is right to be same as this high speed diverter switch.

The 4th embodiment is that each extension circuit 20 is to be same as the output-stage circuit 11 that is in parallel.

Because each extension circuit 20 is corresponding output-stage circuits 11 in parallel and be subjected to the control of this n phase pwm control circuit 10 equally, therefore, each extension circuit 20 all can with output-stage circuit 11 synchronous operations that are in parallel.For example, the electronic switch in this first embodiment can be opened synchronously with high side electronic switch.Electronic switch in this second embodiment can be opened synchronously with the downside electronic switch.Electronic switch in the 3rd embodiment to meeting and high speed diverter switch to synchronous unlatching.The high speed diverter switch of the extension circuit 20 in the 4th embodiment is right, can with the high speed diverter switch of output-stage circuit 11 to synchronous unlatching.This means, the electric current that this input power supply Vin is imported all can be flowed through this extension circuit 20 respectively and the output-stage circuit 11 that is in parallel confluxes to this CPU3 again.

Can recognize that from above-mentioned explanation each extension circuit (20) all provides a shunting action, use the electric current that reduces this output-stage circuit (11) of flowing through, this result will make caused loss of on-state resistance (Rdson) and the heating by high side electronic switch in this output-stage circuit (11) and downside electronic switch, and caused by the coil impedance (DRC) of the choke coil in this output-stage circuit (11) and can significantly be reduced living loss and heating.

From another perspective, for the situation that did not have extension circuit 20 with respect to the past, each output-stage circuit 11 of the present invention and the extension circuit 20 that the is in parallel bigger electric current of obviously can loading jointly.This expression, when this CPU3 need be supplied bigger electric current, the present invention can strengthen the electric current that this input power supply Vin is imported under the situation that does not increase the number of phases, gave this CPU3 with the electric current that supply is bigger.

In addition, as long as make this enlargement module 2 have the function that " connection " reaches " being connected ", other enlargement module 2 just can be more in parallel.In theory, enlargement module 2 the more in parallel, above-mentioned loss and heating will be fallen lowlyer, and the electric current that above-mentioned input power supply Vin is imported will promote highlyer.

In any case, anyone can obtain enough instructions from the explanation of above-mentioned example, and according to and recognize that the present invention has usability and the progressive on the industry really, and the present invention there is no identical in same field or similar techniques discloses formerly and the tool foot has novelty, being that the present invention has really met the patent of invention important document, files an application in the whence in accordance with the law.

Claims

1, a kind of multiple phase DC-to-DC power converter of tool extension circuit, comprise a main modular and an enlargement module, this main modular comprises a n phase pwm control circuit, and n output-stage circuit is individually to connect this n phase pwm control circuit, this enlargement module comprises that n extension circuit is those output-stage circuits in parallel one to one, wherein, those output-stage circuits are under the control of this n phase pwm control circuit an input power supply to be adjusted to an out-put supply, those extension circuits be under the control of this n phase pwm control circuit with the output-stage circuit that is in parallel share the electric current that this input power supply is imported jointly.

2, the multiple phase DC-to-DC power converter of tool extension circuit as claimed in claim 1, wherein each output-stage circuit comprises:

One high speed diverter switch is right, comprises a high side electronic switch and a downside electronic switch, and this two be to be in series, and opens in turn under the control of this n phase pwm control circuit;

One choke coil is the series connection point that an end connects this high and low side electronic switch;

One resistor is the other end that an end connects this choke coil; And

One capacitor is the other end that an end connects this resistor, other end ground connection.

3, the multiple phase DC-to-DC power converter of tool extension circuit as claimed in claim 2, wherein each extension circuit comprises:

One electronic switch is to be parallel to this high side electronic switch and unlatching synchronous with it.

4, the multiple phase DC-to-DC power converter of tool extension circuit as claimed in claim 2, wherein each extension circuit comprises:

One electronic switch is to be parallel to this downside electronic switch and unlatching synchronous with it.

5, the multiple phase DC-to-DC power converter of tool extension circuit as claimed in claim 2, wherein each extension circuit comprises:

One electronic switch is right, is that to be parallel to this high speed diverter switch right, and it is right to be same as this high speed diverter switch.

6, the multiple phase DC-to-DC power converter of tool extension circuit as claimed in claim 2, wherein each extension circuit is to be same as the output-stage circuit that is in parallel.