CN104426373A - Switch power supply voltage regulator - Google Patents
Switch power supply voltage regulator Download PDFInfo
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- CN104426373A CN104426373A CN201310385521.9A CN201310385521A CN104426373A CN 104426373 A CN104426373 A CN 104426373A CN 201310385521 A CN201310385521 A CN 201310385521A CN 104426373 A CN104426373 A CN 104426373A
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- transistor
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- supply voltage
- switch
- power supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/1555—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only for the generation of a regulated current to a load whose impedance is substantially inductive
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a switch power supply voltage regulator comprising a PWM generation circuit generating a pulse width modulation (PWM) signal, an output circuit and a feedback circuit. The feedback circuit provides a feedback signal according to output voltage of the output circuit. The output circuit comprises an electric inductor, multiple up-bridge and down-bridge switches and a driver. The up-bridge and down-bridge switches comprise first transistors and second transistors. When the electric inductor needs to be charged, the corresponding first transistors in the multiple up-bridge and down-bridge switches are selectively conducted by the driver according to the second feedback signal, and conduction time of the conducted first transistors is controlled according to the PWM signal.
Description
Technical field
The present invention relates to a kind of switch power supply voltage regulator.
Background technology
Electric energy passes through a switch power supply voltage regulator supply load usually, e.g., and central processing unit (CPU), memory and controller etc.Described switch power supply voltage regulator is made up of assemblies such as driver, multiple upper bridge switch and inductance usually, and wherein, described multiple upper bridge switch is connected in parallel, and on each, bridge switch is made up of a first transistor and a transistor seconds.Described driver carries out discharge and recharge by the first transistor described in alternate conduction and transistor seconds to described inductance, thinks that described load provides output voltage.
At present, different according to the power of load, the load that load is divided into the light and heavy degrees such as underload and heavy duty different.No matter described load is underload or heavy duty, when needs charge to described inductance, the equal conducting of the first transistor in multiple upper bridge switch described in described driver drives, transistor seconds all end, thus power supply charges to described inductance respectively by the first transistor in described multiple upper bridge switch; When needs discharge to described inductance, the equal conducting of transistor seconds in multiple upper bridge switch described in described driver drives, the first transistor all end, thus described inductance then discharges respectively by the transistor seconds in described multiple upper bridge switch.
But, because described switch power supply voltage regulator is in the process producing above-mentioned output voltage, or drive the equal conducting of the first transistor in described multiple upper bridge switch simultaneously, transistor seconds all ends, or drive the equal conducting of transistor seconds in described multiple upper bridge switch simultaneously, the first transistor all ends, therefore, described switch power supply voltage regulator is not easy to export load current needed for reality respectively for the load of different light and heavy degree.Compared to heavy duty, for underload and middle load, the load current that described switch power supply voltage regulator exports is comparatively large compared to the load current needed for reality, thus the electric energy causing underload and middle load to consume is higher.
Summary of the invention
The technical problem of the load current of corresponding size can not be exported for solving prior art switch power supply voltage regulator according to the size of bearing power, being necessary to provide a kind of switch power supply voltage regulator that can export corresponding size load current according to bearing power size.
For driving a switch power supply voltage regulator for loaded work piece, it comprises: pulse width modulating signal produces circuit, and this pulse-width modulation signal generating circuit produces pulse width modulating signal, output circuit, this output circuit receives this pulse width modulating signal and the supply voltage from a power supply, and is the output voltage of a corresponding size according to this this supply voltage of pulse width modulating signal correspondence adjustment, to drive described loaded work piece, feedback circuit, this feedback circuit exports first according to this output voltage correspondence and feeds back signal to this pulse width modulating signal generation circuit, this pulse width modulating signal produces circuit and adjusts according to this first feedback signal correspondence the pulse width modulating signal exported, to make the output voltage of this output circuit stable output to corresponding load, simultaneously, this feedback circuit exports second of sign bearing power according to this output voltage correspondence further and feeds back signal to this output circuit, the load current of load is exported to according to this second feedback signal correspondence adjustment to make this output circuit.This output circuit comprises: output, and this output exports this output voltage to this load, inductance, this inductance comprises first end and the second end, and this second end is connected with this output, multiple upper bridge switch, on each, bridge switch comprises a first transistor and a transistor seconds, this the first transistor comprises control end, first conduction terminal and the second conduction terminal, this transistor seconds comprises control end, first conduction terminal and the second conduction terminal, first conduction terminal of this first transistor is connected with this power supply, second conduction terminal ground connection of this transistor seconds, second conduction terminal of this first transistor is connected with the first conduction terminal of this transistor seconds, and define an output node therebetween, the output node of each upper bridge switch is connected, this output node is connected with the first end of this inductance, and driver, this driver is all connected with the control end of transistor seconds with the control end of the first transistor in the plurality of upper bridge switch, when needs charge to this inductance, this driver controls the quantity of the first transistor conducting in the plurality of upper bridge switch according to this second feedback signal correspondence, and the ON time of the first transistor of conducting is controlled according to this pulse width modulating signal correspondence, this inductance is charged respectively by the first transistor of conducting to make this supply voltage, when needs discharge to this inductance, this driver controls the quantity of transistor seconds conducting in the plurality of upper bridge switch according to this second feedback signal correspondence, and the ON time of the transistor seconds of conducting is controlled according to this pulse width modulating signal correspondence, discharge respectively by the transistor seconds of conducting to make this inductance.Wherein, when needs charge to this inductance, this driver is according to one or more the first transistor in the plurality of upper bridge switch of this second feedback signal selectivity conducting.
For driving a switch power supply voltage regulator for loaded work piece, it comprises: pulse width modulating signal produces circuit, and this pulse-width modulation signal generating circuit produces pulse width modulating signal, output circuit, this output circuit receives this pulse width modulating signal and the supply voltage from a power supply, and is the output voltage of a corresponding size according to this this supply voltage of pulse width modulating signal correspondence adjustment, to drive described loaded work piece, feedback circuit, this feedback circuit exports first according to this output voltage correspondence and feeds back signal to this pulse width modulating signal generation circuit, this pulse width modulating signal produces circuit and adjusts according to this first feedback signal correspondence the pulse width modulating signal exported, to make the output voltage of this output circuit stable output to corresponding load, simultaneously, this feedback circuit further according to this output voltage correspondence export characterize load weight different second feed back signal to this output circuit, the load current of load is exported to according to this second feedback signal correspondence adjustment to make this output circuit.This output circuit comprises: output, and this output exports this output voltage to this load, inductance, this inductance comprises first end and the second end, and this second end is as this output or go out to hold with this and be connected, multiple upper bridge switch, on each, bridge switch comprises a first transistor and a transistor seconds, this the first transistor comprises control end, first conduction terminal and the second conduction terminal, this transistor seconds comprises control end, first conduction terminal and the second conduction terminal, first conduction terminal of this first transistor is connected with this power supply, second conduction terminal ground connection of this transistor seconds, second conduction terminal of this first transistor is connected with the first conduction terminal of this transistor seconds, and define an output node therebetween, the output node of each upper bridge switch is connected, this output node is connected with the first end of this inductance, wherein, the first transistor of the plurality of upper bridge switch is divided into multiple first switches set, each first switches set comprises at least one the first transistor, the quantity of the first transistor in each first switches set is different from each other, the transistor seconds of the plurality of upper bridge switch is divided into multiple second switch group, each second switch group comprises at least one transistor seconds, the quantity of the transistor seconds in each second switch group is different from each other, driver, this driver is all connected with the control end of transistor seconds with the control end of the first transistor in the plurality of upper bridge switch, when needs charge to this inductance, this driver controls the equal conducting of the first transistor in one first switches set according to this second feedback signal correspondence, and the ON time of the first transistor of conducting is controlled according to this pulse width modulating signal correspondence, this inductance is charged respectively by the first transistor of conducting to make this supply voltage, when needs discharge to this inductance, this driver controls the equal conducting of transistor seconds in a second switch group according to this second feedback signal correspondence, and the ON time of the transistor seconds of conducting is controlled according to this pulse width modulating signal correspondence, discharge respectively by the transistor seconds of conducting to make this inductance.Wherein, when needs charge to this inductance, this driver is according to the whole the first transistors in this second feedback signal selectivity conducting one first switches set.
Because switch power supply voltage regulator of the present invention can come the corresponding the first transistor of selectivity conducting and transistor seconds according to the light and heavy degree of load or bearing power, thus described switch power supply voltage regulator can export the electric current substantially identical with the load current needed for load reality respectively for the light and heavy degree of load or bearing power.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of switch power supply voltage regulator first execution mode of the present invention.
Fig. 2 is the electrical block diagram of switch power supply voltage regulator second execution mode of the present invention.
Main element symbol description
| Switch power supply voltage regulator | 10、20 | Power supply | 100 |
| Pwm signal generation circuit | 11 | Load | 200 |
| Output circuit | 12、22 | Feedback circuit | 13 |
| Driver | 121、221 | Upper bridge switch | 123、223 |
| Inductance | 125、225 | Output | 127、227 |
| Lead-out terminal | 121a、221a | The first transistor | T11、T21 |
| Transistor seconds | T12、T22 | Control end | G11、G12、G21 G22 |
| First conduction terminal | S11、S12 | Second conduction terminal | D11、D12 |
| Output node | N | First switches set | A1 |
| Second switch group | A2 | Second end | a |
| Second end | b | Output voltage | Vout |
| First feedback signal | F11 | Second feedback signal | F12、F22 |
| Load current | I d | Supply voltage | Vin |
| Pwm signal | Spwm |
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1, Fig. 1 is the electrical block diagram of switch power supply voltage regulator first execution mode of the present invention.This switch power supply voltage regulator 10 connects power supply 100 and load 200, regulates for the supply voltage Vin exported this power supply 100, and produces corresponding output voltage Vout and power to load 200.This switch power supply voltage regulator 10 comprises pulse width modulation (Pulse Width Moudle, PWM) signal generating circuit 11, output circuit 12 and feedback circuit 13.This pwm signal generation circuit 11 is for generation of pwm signal Spwm.The pwm signal Spwm correspondence that this output circuit 12 exports according to this pwm signal generation circuit 11 produces output voltage Vout, and provides this output voltage Vout to this load 200.This feedback circuit 13 exports the first feedback signal F11 to this pwm signal generation circuit 11 according to this output voltage Vout correspondence, to control the ON time of the pwm signal Spwm that this pwm signal generation circuit 11 produces or non-conduction time, so control this output circuit 12 all can the output voltage Vout of stable output for the different load 200 of power.Wherein, in the present embodiment, ON time refers to that pwm signal Spwm is in the time of high level, and the non-conduction time refers to that pwm signal Spwm is in the low level time.So, change in present embodiment at other, ON time also can refer to that pwm signal Spwm is in the low level time, but not ON time refers to that pwm signal Spwm is in the time of high level.Simultaneously, this feedback circuit 13 exports the second feedback signal F12 of sign load light and heavy degree to this output circuit 12 according to this output voltage Vout correspondence further, and this output circuit 12 exports to the load current I of load 200 according to the second feedback signal F12 correspondence adjustment
d.
This output circuit 12 comprises driver 121, multiple upper bridge switch 123, inductance 125 and output 127.This driver 121 comprises multiple lead-out terminal 121a.On each, bridge switch 123 comprises an a first transistor T11 and transistor seconds T12.This first transistor T11 comprises control end G11, the first conduction terminal S11 and the second conduction terminal D11.This transistor seconds T12 comprises control end G12, the first conduction terminal S12 and the second conduction terminal D12.The control end G11 of this first transistor T11 is all connected with the lead-out terminal 121a of this driver 121 with the control end G12 of this transistor seconds T12.The first conduction terminal S11 of this first transistor T11 is connected with this power supply 100.The second conduction terminal D12 ground connection of this transistor seconds T12.The second conduction terminal D11 of this first transistor T11 is connected with the first conduction terminal S12 of this transistor seconds T12, and defines an output node N therebetween.The output node N of each upper bridge switch 123 is connected.This inductance 125 comprises first end a and the second end b.This first end a is all connected with the output node N of bridge switch on each 123, and this second end b is connected as this output 127 or with this output 127.In the present embodiment, the first transistor T11 on each in bridge switch 123 and transistor seconds T12 is nmos pass transistor, and correspondingly, this control end G11, G12 are grid, this the first conduction terminal S11, S12 are source electrode, and this second conduction terminal D11, D12 are drain electrode.Change in execution mode at other, the first transistor T11 on each in bridge switch 123 and transistor seconds T12 also can be respectively the combination of PMOS transistor or nmos pass transistor and PMOS transistor, as long as this driver 121 provides corresponding drive singal.
Further, the first transistor T11 of the plurality of upper bridge switch 123 is divided into multiple first switches set A1, and each first switches set A1 comprises at least one the first transistor T11, and the quantity of the first transistor T11 in each first switches set A1 is different from each other.The transistor seconds T12 of the plurality of upper bridge switch 123 is divided into multiple second switch group A2, and each second switch group A2 comprises at least one transistor seconds T12, and the quantity of the transistor seconds T12 in each second switch group A2 is different from each other.For belong to same first or second switch group A1, A2 the control end of transistor be all connected with the same lead-out terminal 121a of this driver 121.In the present embodiment, the plurality of first switches set A1 is identical with the quantity of the plurality of second switch group A2.The quantity of the first transistor T11 in each first switches set A1 is all corresponding identical with the quantity of the transistor seconds T12 in a second switch group A2.For the first switches set A1 and the second switch group A2 with the identical transistor of quantity, preferably, each the first transistor T11 in this first switches set A1 all forms described upper bridge switch 123 with the transistor seconds T12 in this second switch group A2.
Change in execution mode at other, the non-equal correspondence of quantity of the first transistor T11 in each first switches set A1 is identical with the quantity of the transistor seconds T12 in a second switch group A2, that is, the quantity of the first transistor T11 or in each first switches set A1 is all different from the quantity of the transistor seconds T12 in each second switch group A2; Or the quantity of the quantity of the first transistor T11 in a part of first switches set A1 and the transistor seconds T12 in a part of second switch group A2 is corresponding identical respectively, and the quantity of the first transistor T11 in the first switches set A1 of another part is all different from the quantity of the transistor seconds T12 in another part second switch group A2.Be noted that the partitioning standards of the plurality of first switches set A1 and the plurality of second switch group A2 is the light and heavy degree of this load 200, and this process obtains through experiment measuring in advance.At electricity field, usually according to the number of the power of load 200, load 200 is divided into the load that heavy duty, middle load are different from light and heavy degrees such as underloads.Wherein, heavy duty, middle load and underloaded power reduce successively.In addition, between heavy duty and middle load, also can mark off time heavy duty again, load etc. in marking off again between middle load and underload time, to segment load 200.Correspondingly, when to load 200 rough segmentation, as being divided into the load of heavy duty, middle load and underload three kinds of weight types, then it is close or meet multiple loads of predetermined power scope that often kind of load in these three kinds of weight types all can comprise power; When segmenting load 200, the number meeting the load of same weight type tails off, and the number of the even load of each weight type is only one, as long as that is, bearing power difference is then just defined as a kind of load of weight type.Therefore, the quantity of the load 200 that the corresponding light and heavy degree divided is different, corresponding obtain this first switches set A1 and this second switch group A2 quantity and each first switches set A1 and second switch group A2 in the quantity of transistor.
The operation principle of this switch power supply voltage regulator 10 is as follows:
When needs charge to this inductance 125, this driver 121 controls the equal conducting of the first transistor T11 in one first switches set A1 according to this second feedback signal F12 correspondence, and the ON time of the first transistor T11 of conducting is controlled according to this pwm signal Spwm correspondence, this inductance 125 is charged respectively by the first transistor T11 of conducting to make this supply voltage Vin; When needs discharge to this inductance 125, this driver 121 controls the equal conducting of transistor seconds T12 in a second switch group A2 according to this second feedback signal F12 correspondence, and the ON time of the transistor seconds T12 of conducting is controlled according to this pwm signal Spwm correspondence, discharge respectively by the transistor seconds T12 of conducting to make this inductance 125.Wherein, for the load 200 that light and heavy degree is different, this driver 121 controls the first different switches set A1 work according to this second feedback signal F12 correspondence and charges to this inductance 125, and correspondingly controls different second switch group A2 and work and discharge to this inductance 125.
This load 200 is heavier, the first switches set A1 that this driver 121 controls to have the more the first transistor T11 of quantity according to this second feedback signal F12 correspondence works, charges to this inductance 125, and the corresponding second switch group A2 controlling to have the more transistor seconds T12 of quantity works, discharges to this inductance 125; On the contrary, this load 200 is lighter, the first switches set A1 that this driver 121 controls to have the fewer the first transistor T11 of quantity according to this second feedback signal F12 correspondence works, charges to this inductance 125, and the corresponding second switch group A2 controlling to have the fewer transistor seconds T12 of quantity works, discharges to this inductance 125.
For the load 200 that light and heavy degree is identical, this driver 121 controls same first switches set A1 work according to this second feedback signal F12 correspondence, charges to this inductance 125, and the same second switch group A2 of corresponding control works, discharges to this inductance 125.
Because this load 200 is heavier, the quantity of the first transistor T11 of conducting is more, and the first transistor T11 of each conducting is equivalent to be connected to the resistance between this power supply 100 and this inductance 125, and the first transistor T11 of each conducting is parallel connectivity, according to circuit theory, the quantity of the resistance be in parallel is more, then total resistance is less and be less than the resistance of each resistance be in parallel, thus, to should load 200 heavier, the all-in resistance be electrically connected between this power supply 100 and this inductance 125 is less, then export to the load current I of this load 200
dlarger.Similar with the operation principle of the first switches set A1, be concise explanation, the operation principle of this second switch group A2 repeats no more.On the contrary, when this load 200 is lighter, this switch power supply voltage regulator 10 exports to the load current I of this load 200
dless, then closer to the load current needed for this load 200 reality.Therefore the electric energy that this load 200 consumes diminishes.
Refer to Fig. 2, Fig. 2 is the electrical block diagram of switch power supply voltage regulator second execution mode of the present invention.The switch power supply voltage regulator 20 of the second execution mode is substantially identical with the structure of the switch power supply voltage regulator 10 of the first execution mode, the two main distinction is: the control end G21 of the first, the first transistor T21 and the control end G22 of transistor seconds T22 are corresponding to be respectively connected with a lead-out terminal 221a of driver 221; Second, this switch power supply voltage regulator 10 is the conducting quantity controlling the first transistor T11 and transistor seconds T12 according to the light and heavy degree difference of load 200, so, the switch power supply voltage regulator 20 of this two execution mode is the conducting quantity controlling the first transistor T21 and transistor seconds T22 according to load 200 watt level difference, namely, as long as the difference of this load 200 power, namely the conducting quantity that this switch power supply voltage regulator 20 correspondence controls the first transistor T21 and transistor seconds T22 change.In this second embodiment, this driver 221 exports to the load current I of load 200 according to the second feedback signal F22 correspondence adjustment characterizing bearing power
d.
This load 200 power is larger, and when needs charge to this inductance 225, the quantity that this driver 221 controls the first transistor conducting T21 in the plurality of upper bridge switch 223 according to this second feedback signal F22 correspondence is more; When needs discharge to this inductance 225, the quantity that this driver 221 controls transistor seconds conducting T22 in the plurality of upper bridge switch 223 according to this second feedback signal F22 correspondence is more.Otherwise this load 200 power is less, when needs charge to this inductance 225, the quantity that this driver 221 controls the first transistor conducting T21 in the plurality of upper bridge switch 223 according to this second feedback signal F22 correspondence is fewer; When needs discharge to this inductance 225, the quantity that this driver 221 controls transistor seconds conducting T22 in the plurality of upper bridge switch 223 according to this second feedback signal F22 correspondence is fewer.Preferably, this driver 221 alternately controls the first transistor T21 in same upper bridge switch 223 and transistor seconds T22 conducting, carries out discharge and recharge to this inductance 225.
Claims (16)
1. for driving a switch power supply voltage regulator for loaded work piece, it is characterized in that: this switch power supply voltage regulator comprises:
Pulse width modulating signal produces circuit, and this pulse-width modulation signal generating circuit produces pulse width modulating signal;
Output circuit, this output circuit receives this pulse width modulating signal and the supply voltage from a power supply, and is the output voltage of a corresponding size according to this this supply voltage of pulse width modulating signal correspondence adjustment, to drive described loaded work piece;
Feedback circuit, this feedback circuit exports first according to this output voltage correspondence and feeds back signal to this pulse width modulating signal generation circuit, this pulse width modulating signal produces circuit and adjusts according to this first feedback signal correspondence the pulse width modulating signal exported, to make the output voltage of this output circuit stable output to corresponding load, simultaneously, this feedback circuit exports second of sign bearing power according to this output voltage correspondence further and feeds back signal to this output circuit, the load current of load is exported to according to this second feedback signal correspondence adjustment to make this output circuit,
This output circuit comprises:
Output, this output exports this output voltage to this load;
Inductance, this inductance comprises first end and the second end, and this second end is connected with this output;
Multiple upper bridge switch, on each, bridge switch comprises a first transistor and a transistor seconds, this the first transistor comprises control end, first conduction terminal and the second conduction terminal, this transistor seconds comprises control end, first conduction terminal and the second conduction terminal, first conduction terminal of this first transistor is connected with this power supply, second conduction terminal ground connection of this transistor seconds, second conduction terminal of this first transistor is connected with the first conduction terminal of this transistor seconds, and define an output node therebetween, the output node of each upper bridge switch is connected, this output node is connected with the first end of this inductance, and
Driver, this driver is all connected with the control end of transistor seconds with the control end of the first transistor in the plurality of upper bridge switch, when needs charge to this inductance, this driver controls the quantity of the first transistor conducting in the plurality of upper bridge switch according to this second feedback signal correspondence, and the ON time of the first transistor of conducting is controlled according to this pulse width modulating signal correspondence, this inductance is charged respectively by the first transistor of conducting to make this supply voltage; When needs discharge to this inductance, this driver controls the quantity of transistor seconds conducting in the plurality of upper bridge switch according to this second feedback signal correspondence, and the ON time of the transistor seconds of conducting is controlled according to this pulse width modulating signal correspondence, discharge respectively by the transistor seconds of conducting to make this inductance;
Wherein, when needs charge to this inductance, this driver is according to the first transistor corresponding in the plurality of upper bridge switch of this second feedback signal selectivity conducting.
2. switch power supply voltage regulator as claimed in claim 1, is characterized in that: bearing power is different, the quantity that this driver controls the first transistor conducting according to this second feedback signal is different.
3. switch power supply voltage regulator as claimed in claim 2, it is characterized in that: bearing power is larger, the quantity of the first transistor conducting is more.
4. as the switch power supply voltage regulator in claim 1-3 as described in any one claim, it is characterized in that: wherein, when needs discharge to this inductance, this driver is according to transistor seconds corresponding in the plurality of upper bridge switch of this second feedback signal selectivity conducting.
5. switch power supply voltage regulator as claimed in claim 4, is characterized in that: bearing power is different, the quantity that this driver controls transistor seconds conducting according to this second feedback signal is different.
6. switch power supply voltage regulator as claimed in claim 5, it is characterized in that: bearing power is larger, the quantity of this transistor seconds conducting is more.
7. switch power supply voltage regulator as claimed in claim 6, it is characterized in that: for the load that watt level is identical, this inductance is when carrying out charging and discharging, and in the plurality of upper bridge switch, the quantity of the first transistor conducting is identical with the quantity of transistor seconds conducting.
8. switch power supply voltage regulator as claimed in claim 7, is characterized in that: this driver alternately controls the first transistor in same upper bridge switch and transistor seconds conducting, carries out discharge and recharge to this inductance.
9. for driving a switch power supply voltage regulator for loaded work piece, it is characterized in that: this switch power supply voltage regulator comprises:
Pulse width modulating signal produces circuit, and this pulse-width modulation signal generating circuit produces pulse width modulating signal;
Output circuit, this output circuit receives this pulse width modulating signal and the supply voltage from a power supply, and is the output voltage of a corresponding size according to this this supply voltage of pulse width modulating signal correspondence adjustment, to drive described loaded work piece;
Feedback circuit, this feedback circuit exports first according to this output voltage correspondence and feeds back signal to this pulse width modulating signal generation circuit, this pulse width modulating signal produces circuit and adjusts according to this first feedback signal correspondence the pulse width modulating signal exported, to make the output voltage of this output circuit stable output to corresponding load, simultaneously, this feedback circuit further according to this output voltage correspondence export characterize load weight different second feed back signal to this output circuit, the load current of load is exported to according to this second feedback signal correspondence adjustment to make this output circuit,
This output circuit comprises:
Output, this output exports this output voltage to this load;
Inductance, this inductance comprises first end and the second end, and this second end is as this output or go out to hold with this and be connected;
Multiple upper bridge switch, on each, bridge switch comprises a first transistor and a transistor seconds, this the first transistor comprises control end, first conduction terminal and the second conduction terminal, this transistor seconds comprises control end, first conduction terminal and the second conduction terminal, first conduction terminal of this first transistor is connected with this power supply, second conduction terminal ground connection of this transistor seconds, second conduction terminal of this first transistor is connected with the first conduction terminal of this transistor seconds, and define an output node therebetween, the output node of each upper bridge switch is connected, this output node is connected with the first end of this inductance, wherein, the first transistor of the plurality of upper bridge switch is divided into multiple first switches set, each first switches set comprises at least one the first transistor, the quantity of the first transistor in each first switches set is different from each other, the transistor seconds of the plurality of upper bridge switch is divided into multiple second switch group, each second switch group comprises at least one transistor seconds, the quantity of the transistor seconds in each second switch group is different from each other,
Driver, this driver is all connected with the control end of transistor seconds with the control end of the first transistor in the plurality of upper bridge switch, when needs charge to this inductance, this driver controls the equal conducting of the first transistor in one first switches set according to this second feedback signal correspondence, and the ON time of the first transistor of conducting is controlled according to this pulse width modulating signal correspondence, this inductance is charged respectively by the first transistor of conducting to make this supply voltage; When needs discharge to this inductance, this driver controls the equal conducting of transistor seconds in a second switch group according to this second feedback signal correspondence, and the ON time of the transistor seconds of conducting is controlled according to this pulse width modulating signal correspondence, discharge respectively by the transistor seconds of conducting to make this inductance;
Wherein, when needs charge to this inductance, this driver is according to the whole the first transistors in this second feedback signal selectivity conducting one first switches set.
10. switch power supply voltage regulator as claimed in claim 9, is characterized in that: load light and heavy degree is different, and this driver selects the whole the first transistors in different first switches set of conducting according to this second feedback signal.
11. switch power supply voltage regulators as claimed in claim 10, is characterized in that: load is heavier, and this driver selects the first switches set work with the more the first transistors of quantity according to this second feedback signal.
12. as the switch power supply voltage regulator in claim 9-11 as described in any one claim, it is characterized in that: when needs discharge to this inductance, this driver is according to the whole transistor secondses in this second feedback signal selectivity conducting one second switch group.
13. switch power supply voltage regulators as claimed in claim 12, is characterized in that: load light and heavy degree is different, and this driver selects the whole transistor secondses in the different second switch group of conducting according to this second feedback signal.
14. switch power supply voltage regulators as claimed in claim 13, is characterized in that: load is heavier, and this driver selects the second switch group work with the more transistor secondses of quantity according to this second feedback signal.
15. switch power supply voltage regulators as claimed in claim 14, it is characterized in that: for the load that light and heavy degree is identical, this inductance is when carrying out charging and discharging, and this driver selects same first switches set and same second switch group to work according to this second feedback signal.
16. switch power supply voltage regulators as claimed in claim 15, is characterized in that: the plurality of first switches set is identical with the quantity of the plurality of second switch group.
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| CN201310385521.9A CN104426373A (en) | 2013-08-30 | 2013-08-30 | Switch power supply voltage regulator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310385521.9A CN104426373A (en) | 2013-08-30 | 2013-08-30 | Switch power supply voltage regulator |
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| CN101383560A (en) * | 2007-09-05 | 2009-03-11 | 财团法人工业技术研究院 | DC voltage converter |
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| CN102308464A (en) * | 2011-07-06 | 2012-01-04 | 华为技术有限公司 | Method of improving efficiency of DC-DC switching circuit and DC-DC switching circuit control device |
| US20120235653A1 (en) * | 2011-03-17 | 2012-09-20 | Ke-Horng Chen | Zero Current Detecting Circuit and Related Synchronous Switching Power Converter |
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- 2013-08-30 CN CN201310385521.9A patent/CN104426373A/en active Pending
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| CN101383560A (en) * | 2007-09-05 | 2009-03-11 | 财团法人工业技术研究院 | DC voltage converter |
| CN101842970A (en) * | 2007-12-06 | 2010-09-22 | 英特赛尔美国股份有限公司 | System and method for improving inductor current sensing accuracy of a dc/dc voltage regulator |
| CN102047541A (en) * | 2008-06-02 | 2011-05-04 | 株式会社理光 | Current sensing circuit and switching regulator including the same |
| US20120235653A1 (en) * | 2011-03-17 | 2012-09-20 | Ke-Horng Chen | Zero Current Detecting Circuit and Related Synchronous Switching Power Converter |
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