CN205846775U - A kind of power supply provides circuit, is powered equipment and power-supply management system - Google Patents
A kind of power supply provides circuit, is powered equipment and power-supply management system Download PDFInfo
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- CN205846775U CN205846775U CN201620668243.7U CN201620668243U CN205846775U CN 205846775 U CN205846775 U CN 205846775U CN 201620668243 U CN201620668243 U CN 201620668243U CN 205846775 U CN205846775 U CN 205846775U
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Abstract
This application provides a kind of power supply and circuit is provided, it is powered equipment and power-supply management system, described power supply provides the programming Control end PG of circuit to be connected with the described Comm end being powered equipment, described power supply provide circuit be described in be powered equipment and power, described power supply provides circuit to be received from the described compensated information being powered equipment by power supply common port, utilize described compensated information that reference voltage is compensated, and based on the reference voltage calibration after compensating be supplied to described in be powered the voltage of feeder ear of equipment, wherein said compensated information is to be obtained according to the difference of feeder ear voltage Yu target voltage by the described equipment that is powered.Use power management scheme provided herein, without be powered on equipment for each power supply provide circuit be separately provided extra feedback voltage end, only need one to connect end and can support the accurate power supply of multiple service area, reduce cost, reduce the area of printed circuit board (PCB), beneficially device miniaturization simultaneously.
Description
Technical field
The application relates to power circuit technical field, and particularly relating to a kind of power supply provides circuit, is powered equipment and power supply
Management system.
Background technology
Fig. 1 shows the structural representation of electric power management circuit in prior art, as it can be seen, described electric power management circuit
Including being powered chip (application processor), power supply chip (DC-to-DC converter DCDC1～DCDC6).Described power management
Circuit may insure that the supply voltage being powered circuit is more accurate, the dead resistance not caused by encapsulation, circuit board trace
Impact.
But existing scheme there is a disadvantage that, being powered chip (such as: application processor) needs more pin, for
Each service area is required for an extra feedback voltage pin (FB1, FB2, FB3, FB4, FB5, FB6 as in Fig. 1)
Voltage Feedback a little will be powered in power management chip.As a example by shown in Fig. 1, the power domain that is powered described in Fig. 1 is 6
Individual, so needing extra 6 chip pin.Chip pin number is the biggest, and packaging cost is the highest.Additionally chip package is the biggest,
The area taking printed circuit board (PCB) is the biggest, is unfavorable for miniaturization.
Prior art deficiency is:
Existing power supply Managed Solution needs more pin, cause relatively costly, printed circuit board area is relatively big, be unfavorable for
Miniaturization.
Summary of the invention
The embodiment of the present application proposes a kind of power supply and provides circuit, is powered equipment and power-supply management system, existing to solve
Have power management scheme in technology to need more pin, cause relatively costly, printed circuit board area is relatively big, it is small-sized to be unfavorable for
The technical problem changed.
First aspect, the embodiment of the present application provides a kind of power supply and provides circuit, and described power supply provides the programming of circuit
Controlling end to be connected with the power supply common port being powered equipment, described power supply provides circuit to export electricity to the feeder ear being powered equipment
Pressure is powered equipment and powers described in being, described power supply provides circuit to be received from the described equipment that is powered by power supply common port
Compensated information, utilizes described compensated information to compensate reference voltage, and is supplied to based on the reference voltage calibration after compensating
The voltage of the described feeder ear being powered equipment, wherein said compensated information is according to feeder ear voltage by the described equipment that is powered
Obtain with the difference of target voltage.
Second aspect, the embodiment of the present application provides one and is powered equipment, including: it is powered chip, power supply public
End and several feeder ears, described in be powered chip by described feeder ear from corresponding power supply provide circuit obtain power supply, institute
State and be powered chip according to the difference output compensated information of feeder ear voltage and target voltage and by the transmission of power supply common port extremely
Corresponding power supply provides circuit.
3rd aspect, the embodiment of the present application provides a kind of power-supply management system, it is characterised in that include on several
State power supply circuit is provided and above-mentioned is powered equipment.
Have the beneficial effect that:
The power supply provided due to the embodiment of the present application provides circuit, is powered equipment and power-supply management system, each
Power supply provides the programming Control end of circuit all can be connected with the power supply common port being powered equipment, described in be powered equipment permissible
The address providing circuit according to power supply provides circuit output compensated information, described electricity by described power supply common port to each power supply
Source provides circuit that described compensated information can be utilized to compensate reference voltage and defeated based on the reference voltage calibration after compensating
Go out voltage, power accurately for the described equipment that is powered, therefore, use the power management scheme that the embodiment of the present application is provided,
Without be powered on equipment for each power supply provide circuit be separately provided extra feedback voltage end, it is only necessary to one connect end
(i.e. power supply common port) can support the accurate power supply of multiple service area, reduces cost, reduces printed circuit board (PCB) simultaneously
Area, beneficially device miniaturization.
Accompanying drawing explanation
The specific embodiment of the application is described below with reference to accompanying drawings, wherein:
Fig. 1 shows that in prior art, power supply provides the structural representation of circuit；
Fig. 2 shows that in the embodiment of the present application, power supply provides the structural representation one of circuit；
Fig. 3 shows that in the embodiment of the present application, power supply provides the structural representation two of circuit；
Fig. 4 shows that in the embodiment of the present application, power supply provides the structural representation three of circuit；
Fig. 5 shows that in the embodiment of the present application, power supply provides the structural representation four of circuit；
Fig. 6 shows that in the embodiment of the present application, power supply provides the structural representation five of circuit；
Fig. 7 shows the structural representation one being powered chip in the embodiment of the present application；
Fig. 8 shows the structural representation two being powered chip in the embodiment of the present application；
Fig. 9 shows the structural representation one of power-supply management system in the embodiment of the present application；
Figure 10 shows the structural representation two of power-supply management system in the embodiment of the present application；
Figure 11 shows the structural representation three of power-supply management system in the embodiment of the present application；
Figure 12 shows the structural representation of application processor in the embodiment of the present application；
Figure 13 shows the structural representation four of power-supply management system in the embodiment of the present application.
Detailed description of the invention
Technical scheme and advantage in order to make the application are clearer, below in conjunction with exemplary to the application of accompanying drawing
Embodiment is described in more detail, it is clear that described embodiment be only the application a part of embodiment rather than
All embodiments exhaustive.And in the case of not conflicting, the embodiment in this explanation and the feature in embodiment can be mutual
Combine.
For the deficiencies in the prior art, present applicant proposes a kind of power supply provides circuit, is powered equipment and power management
System, it is only necessary to one connects end, supports the accurate power supply of multiple voltage domain (or claiming power domain, service area).
The power supply proposed the application below in conjunction with specific embodiment provides circuit, is powered equipment and power management system
System illustrates.
Embodiment one,
Fig. 2 shows that in the embodiment of the present application, power supply provides the structural representation one of circuit, as it can be seen, power supply provides electricity
The programming Control end on road is connected with the power supply common port being powered equipment, and described power supply provides circuit to the power supply being powered equipment
End output voltage is powered equipment and powers described in being, described power supply is provided circuit to be received by power supply common port and supplied from described
The compensated information of electricity equipment, utilizes described compensated information to compensate reference voltage, and based on the reference voltage school after compensating
Standard is powered the voltage of feeder ear of equipment described in being supplied to, and wherein said compensated information is according to confession by the described equipment that is powered
The difference of electricity terminal voltage and target voltage obtains.
When being embodied as, one is powered equipment and circuit can be provided to be powered equipment to described by one or more power supplys
Being powered, it is public with the described power supply being powered equipment that each power supply provides circuit all can draw a programming Control end PG
End Comm be connected, described in be powered equipment can according to each power supply provide circuit proprietary address by described Comm end to phase
The power supply answered provides circuit to send programming control signal (including compensated information), and described power supply provides circuit by comparing feedback electricity
Reference voltage after pressure and compensation to the described feeder ear VDD output voltage being powered equipment be described in be powered equipment and power.
The power supply provided due to the embodiment of the present application provides circuit, and each power supply provides the programming Control end PG of circuit
All can be connected with the Comm end being powered equipment, described in be powered equipment by described Comm end to each power supply provide circuit
Sending compensated information, described power supply provides circuit to calibrate output voltage based on the reference voltage after compensating, to being powered equipment
Feeder ear VDD output voltage, powers for the described equipment that is powered, and therefore, the power supply using the embodiment of the present application to be provided provides
Circuit, the most how many power supplys provide circuit, all can be connected to the Comm end of the equipment that is powered, be described be powered equipment pair
Power supply provides the output voltage of circuit to compensate, calibrate, and each power supply provides circuit only to need individually to take the equipment of being powered
One connection end carrys out output voltage and can realize the accurate power supply of multiple service area, reduces cost, reduces printing electricity simultaneously
The area of road plate, beneficially device miniaturization.
When being embodied as, described in be powered equipment can be according to the difference of feeder ear vdd voltage and target voltage and confession
Electricity electric current is determined compensation resistance information and is sent to corresponding power supply offer circuit by Comm end；Described power supply offer circuit can
Voltage is compensated, by described compensation voltage and described reference voltage to produce according to described compensation resistance information and output current information
Superposition, as the reference voltage after compensating.
When being embodied as, the embodiment of the present application can compensate circuit by built-in voltage in each power supply provides circuit, supports
The voltage that the ghost effect that disappears causes is inaccurate.Compensation principle is: first compensation resistance is set to zero, by being powered equipment Inspection
It is powered the voltage of a VDD and the difference of target voltage, and measures supply current, calculate dead resistance (dead resistance with this
Equal to (target voltage-supply terminals voltage)/supply current), and it is converted into digital signal, will mark parasitism by Comm end
The digital signal (i.e. mark compensates resistance information) of resistance is delivered to power supply to be provided in circuit, and power supply provides circuit according to compensating electricity
Resistance information produces compensation voltage (compensation resistance is multiplied with output electric current and i.e. compensates voltage) with output current information, will compensate electricity
Laminated is added on reference voltage.
Fig. 3 shows that in the embodiment of the present application, power supply provides the structural representation two of circuit, as it can be seen, described power supply carries
Error amplifier EA, comparator PWMC, agitator OSC, logic circuit, power switch, average voltage mould is may include that for circuit
Block AVG, voltage compensating circuit and adder, described power switch respectively with input supply terminal V, earth terminal G, output switching terminal LX
Being connected with the outfan of logic circuit, the input of described AVG is connected with LX and defeated according to the voltage at described output switching terminal
Going out feedback voltage, the input of described voltage compensating circuit is connected with programming Control end, output switching terminal respectively, and described voltage is mended
Repay circuit output compensate voltage VCOM to adder, described compensation voltage VCOM is added by described adder with reference voltage Ref
Produce output voltage VA to EA, described EA and compare feedback voltage output error amplification the signal EAO, described EAO of VA Yu AVG output
Described power switch is controlled through comparator PWMC output pulse width modulated signal PWMO to logic circuit.
In enforcement, described voltage compensating circuit may include that the first current sampling circuit ISEN1, programmable resistance RPROG
And multiplier, described RPROG input is connected with programming Control end and regulates output according to the compensated information of programming Control end
Resistance Res, the input of described ISEN1 is connected with output switching terminal and the average electricity of electric current output of average described output switching terminal
Stream signal IS, the resistance Res of average current signal IS with the RPROG output that ISEN1 is exported by described multiplier are multiplied to export and mend
Repay voltage VCOM to change to adder, the value of described compensation voltage VCOM with the change of compensated information.
Both by the electric current of MPX1 and MNX1 that sample, and can be added by the first current sampling circuit ISEN1, produces electricity
Inducing current, can produce the average output current of DCDC after average, and reason is average current the putting down equal to DCDC of inductance
All export electric current.
RPROG module is the programmable resistance by PG Digital Signals, can then will first by PG digital signal decoding
Serial digital signal becomes multi-bit parallel digital signal, and the resistance being controlled resistance by switch is realized.
Average current signal IS is multiplied by multiplier with resistance Res, produces and compensates voltage VCOM, and adder is by reference voltage
Ref (equal to the target voltage of converter output voltage) is added an input electricity of generation error amplifier with compensating voltage VCOM
Pressure, error amplifier compares VA voltage and feedback voltage (i.e. the output voltage of transducer), and produces error amplification signal EAO,
EAO produces pulse-width signal PWMO through comparator PWMC, through logic circuit rear drive power switch.
In Fig. 3, feedback loop can be modulated FB voltage (i.e. the output voltage of transducer) and be equal to VA (after overcompensation
Fresh target voltage).
The embodiment of the present application passes through average voltage modules A VG, and according to LX voltage, AVG module can produce the voltage of LX and put down
Average LXAV is as the feedback voltage of feedback loop.
In enforcement, described power supply provides circuit to may include that error amplifier EA, comparator PWMC, agitator OSC, patrol
Collecting circuit, power switch, voltage compensating circuit and adder, described voltage compensating circuit is connected with programming Control end and exports benefit
Repaying voltage VCOM to adder, described compensation voltage VCOM and reference voltage Ref is added generation output voltage by described adder
VA to EA, described EA compare the feedback voltage output error of VA Yu FB and amplify signal EAO, described EAO through comparator PWMC output
Pulse-width signal PWMO controls described power switch to logic circuit.
In enforcement, described voltage compensating circuit may include that current supplying circuit CurGen, programmable resistance RPROG and
Multiplier, described programming Control end is connected with the input of RPROG and CurGen respectively, and described RPROG is according to programming Control end
Compensated information regulation output resistance Res, described CurGen according to obtain sample rate current output average current signal IS, institute
State the resistance Res of average current signal IS with the RPROG output that CurGen exports by the multiplier output that is multiplied and compensate voltage VCOM
To adder, the value of described compensation voltage VCOM changes with the change of compensated information.
Fig. 4 shows that in the embodiment of the present application, power supply provides the structural representation three of circuit, as it can be seen, described power supply core
Sheet eliminates average voltage modules A VG, using the feedback voltage of FB end as the feedback voltage of feedback loop.
In enforcement, the sample rate current of described CurGen can be that internal second current sampling circuit ISEN2 sampled power is opened
The electric current closed is averaged and obtains, or, the sample rate current of described CurGen can be at the current data to PG transmission
The electric current that reason obtains.
When being embodied as, the sample rate current that described CurGen provides can be led to by internal second current sampling circuit ISEN2
The electric current of over-sampling power switch produces inductive current, then process is average thus exports average output current IS, i.e. internal sample
Obtain sample rate current；The sample rate current that described CurGen provides may not be internal sample, but by PG digital signal
Decoding obtains, i.e. also include the current information being quantized in PG end output signal.Described CurGen can be made up of two parts: one
The current data of PG transmission is decoded being converted to parallel data by part；Another part passes through digital-to-analogue conversion according to parallel data
Device is changed into current signal.
General in order to save power consumption, what sample rate current typically took small percentage is sampled electric current, and such as 1/1000, use simultaneously
Programmable resistance in analog parasitic resistance uses corresponding magnification ratio, such as 1000 times, so maintains and compensates voltage and post
Raw ohmic drop is consistent.
Fig. 5 shows that in the embodiment of the present application, power supply provides the structural representation four of circuit, and Fig. 6 shows that the application implements
In example, power supply provides the structural representation five of circuit, as it can be seen,
In enforcement, described power supply provides circuit may further include: phase compensating circuit, described phase compensating circuit
First end is connected with the outfan of EA, the second end ground connection of described phase compensating circuit.
In the embodiment of the present application, phase compensating circuit can be increased to compensate the phase place of feedback loop, make negative feedback loop
Road has sufficiently large phase margin, and such feedback loop can be stablized, it is to avoid loop oscillation.
In enforcement, described phase compensating circuit may include that phase compensation resistance R6 and electric capacity C6, first end of described R6
The first end as described phase compensating circuit is connected with the outfan of EA, the first end phase of second end of described R6 and described C6
Even, second end of described C6 is as the second end ground connection of described phase compensating circuit.
In enforcement, described power switch may include that the first switch MPX1 and second switch MNX1, described first switch
First end is connected with V, and the first end of described second switch is connected with G, and described first switch is connected with the 3rd end of second switch
And it being connected to LX, the second end of described first switch is connected with the first outfan of logic circuit, the second of described second switch
End is connected with the second outfan of logic circuit.
When being embodied as, two power switch can be a PMOS switch and a nmos switch, and LX is two power
The common port that switch connects, the switching signal of LX is produced DC voltage, is powered for being powered equipment after inductance and capacitor filtering.
The sample rate current that described CurGen provides can be opened by sampling first by internal second current sampling circuit ISEN2
Close and the electric current of second switch being added, produce inductive current, then through average thus export average output current IS, i.e. internal
Sampling obtains sample rate current.
In enforcement, described earth terminal ground connection, first end of described input supply terminal and the first electric capacity C1 is connected, described C1's
Second end ground connection, described output switching terminal is connected with first end of inductance L1, second end of described L1 respectively be powered equipment
Feeder ear and the second electric capacity C2 the first end be connected, the second end ground connection of described C2.
When being embodied as, in described power supply offer circuit, C1, C2, L1 can be outside power supply chips, described input supply terminal
V, output switching terminal LX, earth terminal G, programming Control end PG, feedback signal terminal FB can be the input of described power supply chip respectively
Power pin V, switch output pin LX, ground pin G, programming Control pin PG, feedback signal pin FB, described power supply provides
Remaining components and parts of circuit all can be integrated in power supply chip.
Embodiment two,
Based on same inventive concept, the embodiment of the present application provides one and is powered equipment, described in be powered equipment permissible
Including: be powered chip, power supply common port and several feeder ears, described in be powered chip by described feeder ear from accordingly
Power supply provides circuit to obtain power supply, described in be powered the chip difference output compensated information according to feeder ear voltage and target voltage
And sent to corresponding power supply offer circuit by power supply common port.
What the embodiment of the present application was provided is powered equipment, can be that each power supply provides circuit to provide only an end and obtain
Power taking source, it is not necessary to provide circuit to be separately provided a feedback voltage end for each power supply again, decreases the quantity that end takies, and
In order to obtain power supply accurately, a power supply common port only need to be provided to provide circuit to share, by described power supply for all power supplys
Common port provides electronic feedback compensated information for corresponding power supply, in order to corresponding power supply provides circuit to calibrate according to compensated information
Output voltage, preferably powers for being powered equipment.
Fig. 7 shows the structural representation one being powered chip in the embodiment of the present application, as it can be seen, described in be powered core
Sheet may include that analog-digital converter ADC, digital processing circuit Digital and is powered circuit Load, and described Digital passes through
Comm end provides circuit transmission to be set to the signal of zero by compensating resistance to power supply, and is adopted by control signal Ctrl notice ADC
Sample be powered voltage VS, described ADC the VS sampled is compared with target voltage output compensate voltage to Digital, described
Digital determines compensation resistance according to compensation voltage and sample rate current and provides circuit by the output of Comm end to power supply.
Fig. 8 shows the structural representation two being powered chip in the embodiment of the present application, as it can be seen, described in be powered core
Sheet may further include: two inputs of current sampling resistor R7 and the 3rd current sampling circuit ISEN3, described ISEN3
Being respectively connecting to the two ends of R7, the sample rate current obtained is exported the first end conduct to Digital, described R7 by described ISEN3
Being powered the feeder ear of equipment, second end of described R7 is connected with Load and ADC respectively.
Embodiment three,
Based on same inventive concept, the embodiment of the present application additionally provides a kind of power-supply management system, is powered including above-mentioned
Equipment and several power supplys provide circuit, several power supplys described provide circuit can be all described in be powered equipment and power, institute
Stating the equipment of being powered can provide the address of circuit to provide circuit to send compensated information to corresponding power supply according to power supply, in order to institute
Stating power supply provides circuit to calibrate output voltage according to described compensated information, powers accurately for the described equipment that is powered.
Fig. 9 shows the structural representation one of power-supply management system in the embodiment of the present application, as it can be seen, described ground end G
Ground connection, first end of described input supply terminal V with C1 is connected, the other end ground connection of described C1, described output switching terminal LX and L1
The first end be connected, second end of described L1 the first end with feeder ear VDD and C2 being powered equipment respectively is connected, described C2
The second end ground connection.
When being embodied as, each power supply provide circuit can a corresponding feeder ear VDD being powered equipment, each power supply
There is provided circuit all can be connected with the Comm end being powered equipment, each power supply offer circuit can have oneself proprietary address with
Just distinguish.
Figure 10 shows the structural representation two of power-supply management system in the embodiment of the present application, as it can be seen, described ground end G
Ground connection, first end of described input supply terminal V with C1 is connected, the other end ground connection of described C1, described output switching terminal LX and L1
The first end be connected, second end of described L1 the first end with feeder ear VDD and C2 being powered chip respectively is connected, described C2
The second end ground connection；Described FB is connected with the described feeder ear VDD being powered chip.
Electric capacity C1 purpose is stable input voltage, L1 and C2 constitutes low pass filter and filter the switching signal of LX node for connecing
The voltage stabilizing output signal of nearly direct current, LX signal is between input voltage and ground.
The embodiment of the present application considers from precision, and owing to inductance is usually present dead resistance, load current is in this dead resistance
On can produce voltage drop, cause vdd voltage to be less than the average voltage level of LX, therefore, the embodiment of the present application is in order to avoid parasitic electricity
The voltage error that resistance causes, provides circuit can increase a FB end, with the feeder ear VDD phase being powered equipment at each power supply
Even, it is used for feeding back supply terminals voltage.
The power-supply management system that the embodiment of the present application is provided, the programming Control end of each power supply offer circuit is the most permissible
Be connected with the power supply common port being powered equipment, described in be powered equipment and the address of circuit can be provided by described according to power supply
Power supply common port provides circuit output compensated information to each power supply, and described power supply provides circuit can utilize described compensated information
Reference voltage is compensated and based on the reference voltage calibration output voltage after compensating, supplies accurately for the described equipment that is powered
Electricity, therefore, uses the power-supply management system that the embodiment of the present application is provided, it is not necessary to carry for each power supply being powered on equipment
It is separately provided extra feedback voltage end, it is only necessary to an end (i.e. power supply common port) can support the essence of multiple service area for circuit
Really power supply, reduces cost, reduces the area of printed circuit board (PCB), beneficially device miniaturization simultaneously.
Embodiment four,
The embodiment of the present application as a example by adjusting and voltage-reduction switch DC-to-DC converter DCDC, described in be powered equipment for application
Processor, 6 power supplys provide circuit to be powered described application processor, are described as follows:
Figure 11 shows the structural representation one of power-supply management system in the embodiment of the present application, as it can be seen, each power supply
Passage all by independent switching mode DC-to-DC converter chip power supply, each DC-to-DC converter comprise four end: V,
G、FB、LX、PG.Wherein, V is input supply terminal, G be hold, FB is feedback signal terminal, and LX is output switching terminal, PG for programming
Control end.DCDC, according to comparing feedback voltage FB and internal reference voltage, produces error amplification signal, and produces dutycycle accordingly
Control signal controls two power switch.
In order to compensate the sag issue that metal routing on printed circuit board (PCB), encapsulation gold thread etc. cause, the application implements
In example in each switching DC-DC converter built-in voltage compensating circuit, offset voltage that ghost effect causes not
Accurately.The compensation principle of the embodiment of the present application is, first compensation resistance is set to zero, is powered a little by application processor detection
The difference of voltage and target voltage, and measure supply current, with this calculate dead resistance (dead resistance equal to (target voltage-
Supply terminals voltage)/supply current), and it is converted into digital signal.And by Comm end by the numeral letter of mark dead resistance
Number (i.e. mark compensate for resistance information) is delivered in DC-to-DC converter, and DC-to-DC converter is according to compensating resistance information
Produce compensation voltage (compensation resistance is multiplied with output electric current and i.e. compensates voltage) with output current information, voltage superposition will be compensated
On reference voltage, now the voltage ratio desired value of inductance L11 and electric capacity C12 junction is high, equal to desired value and compensation voltage
Sum, after dead resistance, the voltage of actual power point is equal to target voltage.As a example by DCDC1, electric capacity C11 purpose is steady
Determining input voltage, L11 and C12 constitutes low pass filter and the switching signal of LX node is filtered as the voltage stabilizing output letter close to direct current
Number, LX signal is between input voltage and ground.
Figure 12 shows the structural representation of application processor in the embodiment of the present application, as it can be seen, may include that electric current
Sampling resistor (is typically formed by metal routing, it is not necessary to specialized designs, can pass through from die terminals to the gold being powered between circuit
Belong to cabling formed), analog-digital converter ADC, current sampling circuit ISEN3, digital processing circuit Digital, application processor AP,
It is powered circuit Load (be powered circuit Load and be likely to the part into application processor AP or other functional circuit) etc..
Digital processing circuit Digital first passes through Comm notice DC to DC converter and compensation resistance is set to zero, and
By control signal Ctrl notice ADC sampling now be powered voltage VS (such as: when Ctrl signal is high level, ADC enters
Row sampling；When Ctrl signal is low level, ADC does not samples), analog-digital converter ADC is powered point voltage VS by sample
Compare with target voltage, calculate required compensation voltage, export to digital processing circuit Digital.Digital processing electricity
Road Digital, according to compensating information of voltage and current sample information, is calculated and compensates resistance, and exported to direct current by Comm signal
In direct current transducer DCDC, in the specific implementation, current sample information can also be exported to DC to DC converter by Digital
In DCDC.
Figure 13 shows the structural representation two of power-supply management system in the embodiment of the present application, as it can be seen, with Figure 11 phase
Ratio, can save the FB end of DC to DC converter DCDCn.
Its principle is: the average voltage of LX can approximate reflection DCDC output voltage values, and LX is through inductance L11 and electric capacity
After C12 filtering, the output voltage of generation is that VDD powers, the filter effect of inductance capacitance i.e. average voltage.
But considering from precision, there is also error between average voltage level and the VDD of LX, reason is that inductance is usually present and posts
Raw resistance, load current can produce voltage drop in this dead resistance, causes vdd voltage to be less than the average voltage level of LX.And lead to
Cross the compensation principle of the embodiment of the present application, the voltage error that dead resistance causes can be offset.Compared with Figure 11, it is only necessary to mending
The additional electric pressure drop that when repaying voltage, many increases inductance parasitic resistance causes.
Owing to the embodiment of the present application has average voltage modules A VG, described AVG can be directly connected to power supply and provide circuit
Output switching terminal, is averaged the electric current of output switching terminal thus exports average current signal so that need not be further added by one
It is outer through inductance L1 and the filtered electric current of electric capacity C1 that individual FB end obtains chip.The embodiment of the present application is by replacing FB with LX signal
Signal, can save FB end.The encapsulation that less end causes DC to DC converter is less, takies printed circuit board (PCB) less, favorably
In portable set miniaturization.More small package also causes chip manufacturing cost lower.
In the embodiment of the present application, digital communication can transmit information to use single bus mode.Such as: at application processor
Middle design weak pull-up (can be realized by resistance or current source), designs strong pull-down in DC to DC converter and application processor,
DC to DC converter is by time drop-down for this node, and DC to DC converter can transmit signal to application processor；When answering use
During reason device strong pull-down, application processor can transmit signal to DC to DC converter.
During corresponding multiple DC to DC converter, each DC to DC converter can distribute a proprietary address, so
When application processor transmission digital signal, transport addresses information simultaneously, then corresponding DC to DC converter may know that by phase
Should control, such as: when arranging compensation resistance values for DCDC1, other DCDC2～DCDC6 can automatically ignore, be not responding to.
Although having been described for the preferred embodiment of the application, but those skilled in the art once know basic creation
Property concept, then can make other change and amendment to these embodiments.So, claims are intended to be construed to include excellent
Select embodiment and fall into all changes and the amendment of the application scope.
Claims (14)
1. a power supply provides circuit, it is characterised in that described power supply provides the programming Control end of circuit and is powered equipment
Power supply common port be connected, described power supply provide circuit to the feeder ear output voltage being powered equipment be described in be powered equipment supply
Electricity, described power supply is provided circuit to be received from the described compensated information being powered equipment by power supply common port, utilizes described benefit
Reference voltage is compensated by information of repaying, and based on the reference voltage calibration after compensating be supplied to described in be powered the power supply of equipment
The voltage of end, wherein said compensated information is to be obtained according to the difference of feeder ear voltage with target voltage by the described equipment that is powered
's.
2. power supply as claimed in claim 1 provides circuit, it is characterised in that comprising: error amplifier EA, comparator
PWMC, agitator OSC, logic circuit, power switch, average voltage modules A VG, voltage compensating circuit and adder, described merit
Rate switch outfan with input supply terminal, earth terminal, output switching terminal and logic circuit respectively is connected, the input of described AVG
End is connected with output switching terminal and the voltage of average described output switching terminal exports feedback voltage, described voltage compensating circuit defeated
Entering end to be connected with programming Control end, output switching terminal respectively, described voltage compensating circuit output compensation voltage is to adder, described
Described compensation voltage is added generation output voltage VA to EA, described EA and compares VA Yu AVG output by adder with reference voltage
Feedback voltage output error amplifies signal EAO, described EAO through comparator PWMC output pulse width modulated signal PWMO to logic circuit
Control described power switch.
3. power supply as claimed in claim 2 provides circuit, it is characterised in that described voltage compensating circuit includes: the first electric current
Sample circuit ISEN1, programmable resistance RPROG and multiplier, described RPROG regulates defeated according to the compensated information of programming Control end
The resistance Res gone out, the input of described ISEN1 is connected with output switching terminal and the electric current output of average described output switching terminal is flat
All current signal IS, the resistance Res that described average current signal IS with RPROG exports is multiplied to export and compensates electricity by described multiplier
Pressure VCOM changes to adder, the value of described compensation voltage VCOM with the change of compensated information.
4. power supply as claimed in claim 1 provides circuit, it is characterised in that comprising: error amplifier EA, comparator
PWMC, agitator OSC, logic circuit, power switch, voltage compensating circuit and adder, described voltage compensating circuit and programming
Control end be connected and export compensation voltage to adder, described adder described compensation voltage is added with reference voltage produce defeated
Go out the feedback voltage output error amplification signal EAO that voltage VA to EA, described EA compare VA and feedback signal terminal, described feedback letter
The feedback voltage of number end is powered the feeder ear voltage of equipment described in being, described EAO is through comparator PWMC output pulse width modulation letter
Number PWMO controls described power switch to logic circuit.
5. power supply as claimed in claim 4 provides circuit, it is characterised in that described voltage compensating circuit includes: electric current provides
Circuit CurGen, programmable resistance RPROG and multiplier, described programming Control end respectively with the input of RPROG and CurGen
Being connected, described RPROG regulates the resistance Res, described CurGen of output according to acquisition according to the compensated information of programming Control end
Sample rate current output average current signal IS, average current signal IS Yu the RPROG output that CurGen is exported by described multiplier
The resistance Res output that is multiplied compensate voltage VCOM to adder, the value of described compensation voltage VCOM with compensated information change and
Change.
6. power supply as claimed in claim 5 provides circuit, it is characterised in that the sample rate current of described CurGen is internal second
The electric current of current sampling circuit ISEN2 sampled power switch is averaged and obtains, or, the sample rate current of described CurGen is right
The current data of programming Control end transmission carries out processing the electric current obtained.
7. the power supply as described in claim 2 or 4 provides circuit, it is characterised in that described power supply provides circuit to farther include:
Phase compensating circuit, the first end of described phase compensating circuit is connected with the outfan of EA, the second of described phase compensating circuit
End ground connection.
8. power supply as claimed in claim 7 provides circuit, it is characterised in that described phase compensating circuit includes: phase compensation
First end of resistance R6 and electric capacity C6, described R6 is connected with the outfan of EA as the first end of described phase compensating circuit, institute
First end of the second end and described C6 of stating R6 is connected, and second end of described C6 is as the second termination of described phase compensating circuit
Ground.
9. the power supply as described in claim 2 or 4 provides circuit, it is characterised in that described power switch includes the first switch
MPX1 and second switch MNX1, the first end of described first switch is connected with input supply terminal, the first end of described second switch
Being connected with ground end, described first switch is connected with the 3rd end of second switch and is connected to output switching terminal, described first switch
The second end be connected with the first outfan of logic circuit, the second end of described second switch and the second outfan of logic circuit
It is connected.
10. power supply as claimed in claim 9 provides circuit, it is characterised in that described ground end ground connection, described input supply terminal and
First end of the first electric capacity C1 is connected, the second end ground connection of described C1, and described output switching terminal is connected with first end of inductance L1,
Second end of described L1 the first end with the feeder ear being powered equipment and the second electric capacity C2 respectively is connected, second end of described C2
Ground connection.
11. 1 kinds are powered equipment, it is characterised in that including: be powered chip, power supply common port and several feeder ears, institute
State and be powered chip by described feeder ear from corresponding power supply offer circuit acquisition power supply, and according to feeder ear voltage and target
The difference output compensated information of voltage is sent to corresponding power supply offer circuit by power supply common port.
12. are powered equipment as claimed in claim 11, it is characterised in that described in be powered chip and include: analog-digital converter
ADC, digital processing circuit Digital and be powered circuit Load, described Digital provides circuit to send out by Comm end to power supply
Send and be set to the signal of zero by compensating resistance, and be powered voltage VS, described ADC by the notice ADC sampling of control signal Ctrl
The VS sampled comparing with target voltage output and compensates voltage to Digital, described Digital is according to compensating voltage and adopting
Sample electric current determines compensation resistance and provides circuit by the output of Comm end to power supply.
13. are powered equipment as claimed in claim 12, it is characterised in that described in be powered chip and farther include: electric current
Two inputs of sampling resistor R7 and the 3rd current sampling circuit ISEN3, described ISEN3 are respectively connecting to the two ends of R7, institute
State ISEN3 by the first end of the sample rate current obtained output to Digital, described R7 as being powered the feeder ear of equipment, institute
The second end stating R7 is connected with Load and ADC respectively.
14. 1 kinds of power-supply management systems, it is characterised in that include that several power supplys as described in claim 1 to 10 is arbitrary carry
For circuit and it is powered equipment as described in claim 11 to 13 is arbitrary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620668243.7U CN205846775U (en) | 2016-06-29 | 2016-06-29 | A kind of power supply provides circuit, is powered equipment and power-supply management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620668243.7U CN205846775U (en) | 2016-06-29 | 2016-06-29 | A kind of power supply provides circuit, is powered equipment and power-supply management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205846775U true CN205846775U (en) | 2016-12-28 |
Family
ID=57622100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620668243.7U Withdrawn - After Issue CN205846775U (en) | 2016-06-29 | 2016-06-29 | A kind of power supply provides circuit, is powered equipment and power-supply management system |
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| Country | Link |
|---|---|
| CN (1) | CN205846775U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410886A (en) * | 2016-06-29 | 2017-02-15 | 无锡中感微电子股份有限公司 | Power supply supplying circuits, powered equipment and power supply management system |
-
2016
- 2016-06-29 CN CN201620668243.7U patent/CN205846775U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410886A (en) * | 2016-06-29 | 2017-02-15 | 无锡中感微电子股份有限公司 | Power supply supplying circuits, powered equipment and power supply management system |
| CN106410886B (en) * | 2016-06-29 | 2019-07-19 | 无锡中感微电子股份有限公司 | A kind of power supply provides circuit, is powered equipment and power-supply management system |
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