CN102570814A - Switching power supply feedback compensation method and digital signal processing device - Google Patents

Switching power supply feedback compensation method and digital signal processing device Download PDF

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CN102570814A
CN102570814A CN2010106019624A CN201010601962A CN102570814A CN 102570814 A CN102570814 A CN 102570814A CN 2010106019624 A CN2010106019624 A CN 2010106019624A CN 201010601962 A CN201010601962 A CN 201010601962A CN 102570814 A CN102570814 A CN 102570814A
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digital signal
signal processing
circuit
power supply
switching power
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郭海鹏
陈皓
杜鹏
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ZTE Corp
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ZTE Corp
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Abstract

The invention provides a switching power supply feedback compensation method and a digital signal processing device. The method comprises the following steps of: configuring the digital signal processing circuit with preset parameters to acquire an output voltage signal of a switching power supply, wherein the preset parameters make that a digital domain transfer function of the digital signal processing circuit is matched with an analog domain transfer function of an analog simulation circuit capable of compensating the switching power supply; and performing compensation processing on the output voltage signal by the digital signal processing circuit. According to the switching power supply feedback compensation method and the digital signal processing device, the feedback compensation analog circuit of the conventional switching power supply is changed into the digital signal processing circuit, repeated welding is not required to be performed on a device during debugging of the compensation circuit, and the complexity of debugging is reduced.

Description

Switching Power Supply feedback compensation method and digital signal processing device
Technical field
The present invention relates to the communications field, in particular to a kind of Switching Power Supply feedback compensation method and digital signal processing device.
Background technology
Mainly comprise error-detecting and switch control two parts in the feedback loop of Switching Power Supply.Wherein, error-detecting is made up of error amplifier and corresponding compensation network, and switching control section is generally pulse width modulation (Pulse Width Modulation the abbreviates PWM as) controller of comparator and saw-toothed wave generator composition.At present the most popularly judge that the most simply the criterion of Switching Power Supply loop stability work is: guarantee that the slope of open-loop gain at the cross-over frequency place is-1, and keep 45 ° phase margin.For open-loop gain is met this requirement, in compensation loop, increase a compensating network usually, the zero limit of transfer function is regulated.Fig. 1 is the circuit diagram according to a kind of compensating circuit of correlation technique, and is as shown in Figure 1, and common compensating network increases resistance-capacitance network and realizes before error amplifier.
Compensating network can be divided into again several kinds dissimilar, be I type compensating network when having only R1, C1, I type compensating network is equivalent to simple integrator, wherein has only one zero limit, and is limited to the zero limit adjustment capability of system.The network that contains R1, R2, C1, C2 is called II type compensating network, and II property compensating network has one zero limit, a zero point and a limit.Complete resistance-capacitance network is called III type compensating network, and the function of III type compensating network is the most powerful, but the calculating of transfer function is also the most complicated.
The s territory transfer function that III type network obtains after through Laplace transform is:
GIAN TYPEIII = R 1 + R 3 R 1 × C 1 × R 3 × ( s + 1 R 2 × C 2 ) × ( s + 1 ( R 1 + R 3 ) × C 3 ) s × ( s + C 1 + C 2 R 2 × C 1 × C 2 ) × ( s + 1 R 3 × C 3 )
Can find out and contain one zero limit, two limits and two zero points in the III type compensating network, be the strongest to the regulating action of loop.Can also through configuration resistance and electric capacity it be adjusted into II type or I type compensating network according to the actual needs of circuit simultaneously.
In the side circuit design, calculate one group of theoretical resistance and capacitance according to loop transfer function earlier usually, adjust according to actual conditions then, revise resistance and the concrete parameter of electric capacity.Do like this with regard to need in the middle of the debugging of the later stage of circuit, carrying out repeatedly dismounting and welding usually, increased the complexity of debugging device.When switching frequency or input voltage variation, be guarantee loop stable, loop transfer function also needs to change thereupon, so also need adjust the parameter of network.And the side circuit plate of each switching circuit possibly bring different parasitic parameters because of the difference of placement-and-routing, thereby makes one group of stable loop parameter possibly in next circuit board, become unstable.
Summary of the invention
The present invention aims to provide a kind of Switching Power Supply feedback compensation method and digital signal processing device, high, the debugging back systematic function problem of unstable of debugging complexity when carrying out the power supply feedback compensation to solve in the correlation technique through analog circuit.
One aspect of the present invention provides a kind of Switching Power Supply feedback compensation method; Comprise: the digital signal processing circuit of configuration parameter preset obtains the output voltage signal of said Switching Power Supply; Wherein, said parameter preset makes the analog domain transfer function of numeric field transfer function and the analog compensation circuit that can compensate said Switching Power Supply of said digital signal processing circuit be complementary; Said digital signal processing circuit compensates processing to said output voltage signal.
Further, said parameter preset is confirmed in the following manner: convert the analog domain transfer function of said analog compensation circuit to corresponding numeric field transfer function; Confirm to make the said numeric field transfer function of said digital signal processing circuit and the identical parameter of numeric field transfer function that is converted to; With said definite parameter as said parameter preset.
Further, convert the analog domain transfer function of said analog compensation circuit to corresponding numeric field transfer function through preset algorithm, wherein, it is one of following that said preset algorithm comprises: not political reform of impulse response, Bilinear transformation method.
Further, also comprise: communication interface circuit receives from the modification of host computer and/or debug command; Said communication interface circuit is sent to said digital signal processing circuit with said modification and/or debug command; Said digital signal processing circuit is according to said modification and/or debug command, and the said parameter preset of configuration is made amendment and/or debugged.
Further, said digital signal processing circuit compensates to handle to said output voltage signal and comprises: said digital signal processing circuit carries out error to said output voltage signal and amplifies; Output voltage signal after said digital signal processing circuit amplifies said error through the numeric field transfer function of said digital signal processing circuit compensates processing.
Further; After said digital signal processing circuit compensates processing to said output voltage signal; Also comprise: said digital signal processing circuit generates the switch driving circuit that switch controlling signal is sent to said Switching Power Supply according to the result of said compensation deals; Said switch driving circuit is controlled the switch motion of the main switch of said Switching Power Supply according to said switch controlling signal.
Further, the said output voltage signal that obtains of said digital signal processing circuit be output voltage signal that said Switching Power Supply generates sample through analog/digital A/D sample circuit and quantize after the discrete digital signal that obtains.
Another aspect of the present invention provides a kind of digital signal processing device; Comprise: the compensating module of configuration parameter preset; Be used for the output voltage signal that obtains from Switching Power Supply is compensated processing; Wherein, said parameter preset makes the analog domain transfer function of numeric field transfer function and the analog compensation circuit that can compensate said Switching Power Supply of said compensating module be complementary.
Further, said digital signal processing device also comprises: the error amplification module is used for that said output voltage signal is carried out error and amplifies; Output voltage signal after said compensating module is used for numeric field transfer function through said compensating module said error amplification module error is amplified compensates processing.
Further, this device also comprises: receiver module is used to receive modification and/or the debug command from communication interface circuit; Configuration module is used for according to said modification and/or debug command, and the said parameter preset that disposes on the said compensating module is made amendment and/or debugged.
Further; This device also comprises: the control signal generating module; Be used for result according to said compensation deals; Generate the switch driving circuit that switch controlling signal is sent to said Switching Power Supply, so that said switch driving circuit is controlled the switch motion of the main switch of said Switching Power Supply according to said switch controlling signal.
Through the present invention; Make the analog domain transfer function of numeric field transfer function and the analog compensation circuit that can compensate Switching Power Supply of digital signal processing circuit be complementary; And digital signal processing circuit compensates the output voltage signal of Switching Power Supply; Solved the high problem of debugging complexity when carrying out the power supply feedback compensation through analog circuit; Change the feedback compensation analog circuit of conventional switch power supply into digital signal processing circuit, need not device is carried out welding repeatedly during the compensating circuit debugging, reduced the complexity of debugging.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the circuit diagram according to a kind of compensating circuit of correlation technique;
Fig. 2 is the flow chart according to the Switching Power Supply feedback compensation method of the embodiment of the invention;
Fig. 3 is the structured flowchart according to the digital signal processing device of the embodiment of the invention;
Fig. 4 is the preferred structure block diagram one according to the digital signal processing device of the embodiment of the invention;
Fig. 5 is the preferred structure block diagram two according to the digital signal processing device of the embodiment of the invention;
Fig. 6 is the preferred structure block diagram three according to the digital signal processing device of the embodiment of the invention;
Fig. 7 is the frequency response simulation curve sketch map according to the filter of embodiment 2;
Fig. 8 is the frequency response simulation curve sketch map according to the digital filter of embodiment 2;
Fig. 9 is the realization circuit diagram according to the digitlization compensating network of embodiment 3;
Figure 10 is the flow chart according to the main program in the digital processing unit of embodiment 3.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Fig. 2 is that this method comprises according to the flow chart of the Switching Power Supply feedback compensation method of the embodiment of the invention:
Step S202; The digital signal processing circuit of configuration parameter preset obtains the output voltage signal of Switching Power Supply; Wherein, parameter preset makes the analog domain transfer function of numeric field transfer function and the analog compensation circuit that can compensate Switching Power Supply of digital signal processing circuit be complementary;
Step S204, digital signal processing circuit compensates processing to output voltage signal.
Through above method; Make the analog domain transfer function of numeric field transfer function and the analog compensation circuit that can compensate Switching Power Supply of digital signal processing circuit be complementary; And digital signal processing circuit compensates the output voltage signal of Switching Power Supply; Solved the high problem of debugging complexity when carrying out the power supply feedback compensation through analog circuit; Change the feedback compensation analog circuit of conventional switch power supply into digital signal processing circuit, need not device is carried out welding repeatedly during the compensating circuit debugging, reduced the complexity of debugging; And, digital circuit for the requirement of placement-and-routing far below analog circuit, thereby further improve the efficient and the reliability of circuit design.
In practical application; Can confirm the parameter preset of digital signal processing circuit according to the analog circuit that is used for Switching Power Supply is compensated; For example, parameter preset can be confirmed in the following manner: convert the analog domain transfer function of analog compensation circuit to corresponding numeric field transfer function; Confirm to make the numeric field transfer function of digital signal processing circuit and the identical parameter of numeric field transfer function that is converted to; With the parameter of confirming as parameter preset.This definite mode is easy to realize, and can obtains the parameter preset of digital signal processing circuit more exactly.
In practical implementation, can convert the analog domain transfer function of analog compensation circuit to corresponding numeric field transfer function through preset algorithm, wherein, it is one of following that preset algorithm includes but not limited to: not political reform of impulse response, Bilinear transformation method.
For the ease of the technical staff parameter preset of digital signal processing circuit is debugged and/or revised; A communication interface circuit can be set; After it receives the modification and/or debug command from host computer; To revise and/or debug command is sent to digital signal processing circuit, digital signal processing circuit is according to revising and/or debug command, and the parameter preset of configuration is made amendment and/or debugged.In this way, can times without number the parameter of digital signal processing circuit be adjusted and optimize, thereby make its performance reach optimum, realize compensation effect preferably.In addition, this digitlization feedback compensation loop method for designing can also be carried out certain directive function to existing analog switched power supply feedback control loop.After in the debugging of digitlization power circuit, obtaining the parameter of one group of stable digital feedback compensation loop equation; Can carry out conversion to its transfer function through host computer; Derivation according to transfer function obtains one group of corresponding analog circuit transfer function; Then obtain parameters such as resistance that corresponding analog circuit needs, electric capacity, this can instruct Design of Simulating Circuits work to a certain extent.
In order to simplify circuit design; Can also the process that error is amplified also be put into digital signal processing circuit handles; Digital signal processing circuit carries out after error amplifies output voltage signal, and the output voltage signal after through the numeric field transfer function of digital signal processing circuit error being amplified compensates processing.
Mode as other a kind of preferred simplification circuit design; Can the generation of switch controlling signal also be put in the digital signal processing circuit and realize; Promptly after digital signal processing circuit compensates processing to output voltage signal; Digital signal processing circuit generates the switch driving circuit that switch controlling signal is sent to Switching Power Supply according to the result of compensation deals; Follow-up switch driving circuit is according to the switch motion of the main switch of switch controlling signal control switching.
Need to prove that these the two kinds modes of simplifying circuit design also can be used simultaneously, thereby make digital signal processing circuit bear Processing tasks as much as possible, farthest simplify circuit design.
Preferably; The output voltage signal that digital signal processing circuit obtains can for the output voltage signal that Switching Power Supply generates sample through analog/digital (Analogical/Digital abbreviates A/D as) sample circuit and quantize after the discrete digital signal that obtains.
Fig. 3 is the structured flowchart according to the digital signal processing device of the embodiment of the invention; As shown in Figure 3; This digital signal processing device comprises: the compensating module 32 of configuration parameter preset; Be used for the output voltage signal that obtains from Switching Power Supply is compensated processing, wherein, parameter preset makes the analog domain transfer function of numeric field transfer function and the analog compensation circuit that can compensate Switching Power Supply of compensating module 32 be complementary.
Fig. 4 is the preferred structure block diagram one according to the digital signal processing device of the embodiment of the invention, and is as shown in Figure 4, and this digital signal processing device also comprises: error amplification module 42 is used for that output voltage signal is carried out error and amplifies; Output voltage signal after compensating module 32 is used for numeric field transfer function through compensating module 32 error amplification module error is amplified compensates processing.
Fig. 5 is the preferred structure block diagram two according to the digital signal processing device of the embodiment of the invention; As shown in Figure 5; On the basis of Fig. 3, this digital signal processing device can also comprise: receiver module 52 is used to receive modification and/or the debug command from communication interface circuit; Configuration module 54 is used for according to revising and/or debug command, and the parameter preset of configuration on the compensating module 32 is made amendment and/or debugged.
Fig. 6 is the preferred structure block diagram three according to the digital signal processing device of the embodiment of the invention; As shown in Figure 6; On the basis of Fig. 3, can also comprise: control signal generating module 62 is used for the result according to compensation deals 32; Generate the switch driving circuit that switch controlling signal is sent to Switching Power Supply, so that switch driving circuit is according to the switch motion of the main switch of switch controlling signal control switching.
The embodiment 1-3 that below describes combines the technical scheme of above-mentioned a plurality of preferred embodiments.
Embodiment 1
Present embodiment provides a kind of digital feedback compensating circuit that can be through PC control, so that the problem that solves that the circuit debugging that traditional compensating circuit exists is complicated, can not revise behind the circuit production.The digitizing solution of the feedback compensation loop of present embodiment is divided into realizes circuit and compensation method, comprising: A/D sample circuit, digital signal processing circuit, communication interface circuit, switch driving circuit, and corresponding compensation circuit digital method.Wherein:
The function of A/D sample circuit is to gather the output voltage signal of power supply, and this analog voltage signal is quantified as discrete digital signal;
Digital signal processing circuit is accomplished the function of error amplifier, compensating network, switch controlling signal generation;
The result that switch driving circuit is exported according to digital signal processing circuit drives main switch and carries out switch motion;
Communication interface circuit is used for realizing the communication of power supply and host computer (for example, PC etc.), can make amendment to power supply feedback network, output voltage, switching frequency etc. and debugs through host computer;
The compensating circuit digitizing solution uses corresponding calculation method with the translation of transfer function of the analog circuit transfer function as numeric field, and calculates the input parameter value of corresponding program, is used to realize the digital compensation network.
Can not revise behind present compensating circuit debugging complicacy, the circuit production, for solving a little problems, in the above scheme, the error amplification of loop and compensating network, ON-OFF control circuit can use digital signal processor to realize.After changing feedback control circuit into digital circuit, can debug network transfer function, need not again circuit to be changed through revising the control program parameter of moving in the processor; Significantly reduced the complexity of debug circuit; And adopt digital circuit to realize compensating network, need not add analogue device, simplified design; Requirement to placement-and-routing is lower; When applicable situation or circuit parameter change, only need to revise the steady operation that operation program in the digital processing unit just can guarantee loop, improve the applicability of Switching Power Supply efficiency of design and circuit greatly.
Embodiment 2
The compensating network of error amplifying circuit can be regarded as the filter that a RC forms, and the method that analog filter is converted into digital filter includes but not limited to: not political reform of impulse response and Bilinear transformation method.Below describe respectively:
(1) not political reform of impulse response is the unit impact response function with the unit impact response sequence imitation analog filter of digital filter, thereby realizes the method for corresponding digital filter.This method need ask the Laplace inverse transformation to obtain the impulse response of analog filter s territory transfer function, and sampling obtains the impulse response of digital filter then, obtains digital filter parameter through the z conversion again.
The advantage of this method is that the time domain of analog filter is approached well; Be suitable for the linear phase On Digitalization of Analog Filters; Shortcoming is because time domain sample can produce the frequency response aliasing effect; So not political reform of impulse response needs earlier analog filter to be limit band, otherwise the filter that obtains will cause distortion because of aliasing effect.
(2) not political reform of impulse response meeting causes the aliased distortion of frequency response, and its reason is that the mapping from the s plane to z-plane is the multivalued mappings relation.In order to overcome this shortcoming, can adopt Bilinear transformation method to carry out Design of Digital Filter.Bilinear transformation method is the frequency response a kind of transform method similar with the frequency response of analog filter that makes digital filter; In order to overcome this shortcoming of multivalued mappings; At first will be with in s flat compressed to the horizontal stripe band; Carry out conversion through the s plane of standard to the transformation relation of z-plane again, thereby eliminate aliasing effect.
If the RC parameter of one group of III type compensating network is R1=1.6K, C1=1.5nF, R2=12K, C2=22pF, R3=22.1, C3=680pF, then corresponding s territory transfer function is:
G ( s ) TYPEIII = 3.058 × 10 7 × s 2 + 1.436 × 10 14 × s + 1.05 × 10 20 s 3 + 7.039 × 10 7 × s 2 + 2.558 × 10 14 × s
Fig. 7 is the frequency response simulation curve sketch map according to the filter of embodiment 2.Wherein, the amplitude-response curve in the frequency response of last figure expression analog circuit transfer function, figure below is represented the phase response curve in the frequency response.
Use the matlab coding to be through the z territory transfer function that Bilinear transformation method obtains:
G ( z ) TYPEIII = 0.2123 - 0.1084 × z - 1 - 0.2008 × z - 2 + 0.12 × z - 3 1 - 0.9322 × z - 1 - 0.5729 × z - 2 - 0.5051 × z - 3
After obtaining z territory transfer function, can obtain the concrete parameter value of filter through corresponding coefficient.According to the result of above-mentioned conversion, the input-output time-domain difference equation that obtains is:
y ( n ) = Σ k = 0 3 b k x ( n - k ) + Σ k = 1 3 a k y ( n - k )
Wherein:
b 0＝02123，b 1＝-0.1084，b 2＝-0.2008，b 3＝0.12
a 1＝-0.9322，a 2＝-0.5729，a 3＝-0.5051
Fig. 8 is the frequency response simulation curve sketch map according to the digital filter of embodiment 2.Wherein, the amplitude-response curve in the frequency response of last chart registration word transfer function, figure below is represented the phase response curve in the frequency response.
Can find out that in conjunction with Fig. 7 and Fig. 8 the frequency response curve of this digital filter and analog filter is close, can play the effect of compensating network, make loop stability work.
Embodiment 3
Fig. 9 is the realization circuit diagram according to the digitlization compensating network of embodiment 3, comprising main power circuit 901, FEEDBACK CONTROL primary processor 902, A/D sample circuit 903, PWM drive circuit 904 and host computer 905.
Can select single-chip microcomputer, DSP, FPGA etc. to carry out computing in the digital feedback control circuit as primary processor 902.The characteristics of single-chip microcomputer are to be simple and easy to usefulness, and rich interface is low in energy consumption, but arithmetic speed is relatively slow; The characteristics of DSP are that arithmetic speed is very fast, because its particular structural, be suitable for the digital signal processing algorithm of realizing that multiply-add operation is more, but program development are comparatively complicated; The characteristics of FPGA are to have hardware to realize logic fully, and multiplex arithmetric executed in parallel fully, and are therefore fastest, be suitable for needing realizing the algorithm of a large amount of parallel processings, but power consumption and cost are higher relatively, and communication interface complicacy comparatively.In the algorithm of digital feedback control, because many multiply-add operations are arranged, and rate request is higher, has to communicate with host computer, and it is the most suitable therefore to select for use dsp processor to realize.Can select to realize as primary processor like the processor of the low-power consumption high-performance such as TMS320VC5416 (160MIPS arithmetic speed) of Ti company.
The parameter of A/D sample circuit need be confirmed according to the factors such as switching frequency of Switching Power Supply.According to Nyquist's theorem can know when the A/D sampling rate reach signal frequency (being the switching frequency of Switching Power Supply here) more than 2 times the time, can guarantee that aliased distortion does not take place the frequency spectrum of sampled signal.Usually, when the A/D sample frequency reach signal frequency more than 10 times the time, can obtain best treatment effect.The frequency of supposing Switching Power Supply is when 200KHz, and can select sample rate is the A/D change-over circuit (like AD9220 etc.) of 2MSPS (Sample Per Second), satisfies the requirement of optimum sampling speed.
Communication interface can be used for communicating by letter of host computer 905 and control circuit, through host computer compensating network parameter or output voltage etc. is adjusted, and is convenient to the debugging of power supply.Therefore the rate request of the communications interface control module 110 in the control circuit is not high, can adopt simple UART serial communication interface or I2C interface to realize.When Switching Power Supply loop job insecurity, can on host computer, make amendment and emulation to the feedback compensation network, amended parameter is sent to the parameter before the replacement in the processor through communication interface.Equally, parameters such as the switching frequency of circuit and output voltage also can be used as program parameter and are stored in the primary processor,, when parameter need change, send command adapted thereto by host computer and make amendment and get final product because upgrading or other reasons when circuit.If the disposal ability of processor is enough, can also increase current acquisition control, functions such as temperature acquisition send to host computer through communication interface, realize the functions such as working condition monitoring of FEEDBACK CONTROL and power supply simultaneously.
Pwm control circuit in the conventional switch power supply is also realized with program in digital processing unit, is only externally kept PWM drive circuit 904.Usage counter is as saw-toothed wave generator in processor, when the count value of counter reaches the output valve of error amplification procedure, triggers the saltus step of PWM output.108 control precision of PWM control module is by the number of counter bits decision of processor.
Program in the primary processor mainly is made up of program initialization module 1001, compensation operation module 1002, PWM computing module 1003, communicator program 1005, A/D data acquisition subprogram 1007, PWM control subprogram 1009.Figure 10 is the flow chart according to the main program in the digital processing unit of embodiment 3, and is shown in figure 10:
Program initialization module 1001 is the initialization data internal memory at first, with parameter list write memory assigned address, and count initialized device, A/D control port and I2C communication interface; A/D data acquisition subprogram 1007 is carried out the data field that data acquisition and sampled result are put into internal memory according to the sample rate control A/D change-over circuit of setting, and supplies compensation operation module 1002 to use; Compensation operation module 1002 reads the A/D sampled result from datarams, and carries out multiply-add operation according to the difierence equation and the relevant parameter of digital compensation network, the output operation result; PWM computing module 1003 calculates the duty ratio of corresponding PWM control according to the result of error compensation network operations and the reference value of output voltage; PWM control subprogram 1009 is exported corresponding PWM waveform according to the result of PWM computing module, controls the switching tube action in the main power circuit through pwm driver; Communicator program 1005 is responsible for and the communicating by letter of host computer, and when host computer sends when instructing, according to difference equation parameter list in the instruction modification internal memory or output voltage reference value, operation program carries out computing according to new parameter next time when carrying out.
From above description; Can find out, in the scheme that the embodiment of the invention provides, use transform domain method and digital computing method the resistance in the analog circuit, capacitance to be transformed into the parameter value of corresponding digital filter; Make compensating circuit to realize through the mode of digital filter; When the characteristic that has guaranteed compensating network can satisfy the demands, can make amendment to parameter neatly through host computer, satisfy the demand of different application occasion; Both improve the applicability of Switching Power Supply, and made power supply that bigger upgrading and extending space have been arranged again.
Obviously; It is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize that they can concentrate on the single calculation element with the general calculation device; Perhaps be distributed on the network that a plurality of calculation element forms; Alternatively, they can be realized with the executable program code of calculation element, carried out by calculation element thereby can they be stored in the storage device; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (11)

1. a Switching Power Supply feedback compensation method is characterized in that, comprising:
The digital signal processing circuit of configuration parameter preset obtains the output voltage signal of said Switching Power Supply; Wherein, said parameter preset makes the analog domain transfer function of numeric field transfer function and the analog compensation circuit that can compensate said Switching Power Supply of said digital signal processing circuit be complementary;
Said digital signal processing circuit compensates processing to said output voltage signal.
2. method according to claim 1 is characterized in that, said parameter preset is confirmed in the following manner:
Convert the analog domain transfer function of said analog compensation circuit to corresponding numeric field transfer function;
Confirm to make the said numeric field transfer function of said digital signal processing circuit and the identical parameter of numeric field transfer function that is converted to;
With said definite parameter as said parameter preset.
3. method according to claim 2; It is characterized in that; Convert the analog domain transfer function of said analog compensation circuit to corresponding numeric field transfer function through preset algorithm, wherein, it is one of following that said preset algorithm comprises: not political reform of impulse response, Bilinear transformation method.
4. method according to claim 1 is characterized in that, also comprises:
Communication interface circuit receives from the modification of host computer and/or debug command;
Said communication interface circuit is sent to said digital signal processing circuit with said modification and/or debug command;
Said digital signal processing circuit is according to said modification and/or debug command, and the said parameter preset of configuration is made amendment and/or debugged.
5. method according to claim 1 is characterized in that, said digital signal processing circuit compensates to handle to said output voltage signal and comprises:
Said digital signal processing circuit carries out error to said output voltage signal and amplifies;
Output voltage signal after said digital signal processing circuit amplifies said error through the numeric field transfer function of said digital signal processing circuit compensates processing.
6. method according to claim 1 is characterized in that, after said digital signal processing circuit compensates processing to said output voltage signal, also comprises:
Said digital signal processing circuit generates the switch driving circuit that switch controlling signal is sent to said Switching Power Supply according to the result of said compensation deals;
Said switch driving circuit is controlled the switch motion of the main switch of said Switching Power Supply according to said switch controlling signal.
7. method according to claim 1; It is characterized in that, the said output voltage signal that said digital signal processing circuit obtains be output voltage signal that said Switching Power Supply generates sample through analog/digital A/D sample circuit and quantize after the discrete digital signal that obtains.
8. a digital signal processing device is characterized in that, comprising:
The compensating module of configuration parameter preset; Be used for the output voltage signal that obtains from Switching Power Supply is compensated processing; Wherein, said parameter preset makes the analog domain transfer function of numeric field transfer function and the analog compensation circuit that can compensate said Switching Power Supply of said compensating module be complementary.
9. digital signal processing device according to claim 8 is characterized in that,
Said digital signal processing device also comprises: the error amplification module is used for that said output voltage signal is carried out error and amplifies;
Output voltage signal after said compensating module is used for numeric field transfer function through said compensating module said error amplification module error is amplified compensates processing.
10. digital signal processing device according to claim 8 is characterized in that, also comprises:
Receiver module is used to receive modification and/or the debug command from communication interface circuit;
Configuration module is used for according to said modification and/or debug command, and the said parameter preset that disposes on the said compensating module is made amendment and/or debugged.
11. digital signal processing device according to claim 8 is characterized in that, also comprises:
The control signal generating module; Be used for result according to said compensation deals; Generate the switch driving circuit that switch controlling signal is sent to said Switching Power Supply, so that said switch driving circuit is controlled the switch motion of the main switch of said Switching Power Supply according to said switch controlling signal.
CN2010106019624A 2010-12-22 2010-12-22 Switching power supply feedback compensation method and digital signal processing device Pending CN102570814A (en)

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CN104052486A (en) * 2013-03-12 2014-09-17 Ls产电株式会社 Method for setting offset gain of analog output module
CN105305824A (en) * 2015-11-13 2016-02-03 苏州扬佛自动化设备有限公司 Voltage boosting conversion circuit of switching power supply
CN105305851A (en) * 2015-11-13 2016-02-03 苏州扬佛自动化设备有限公司 Voltage reduction control method of switching power supply
CN105429256A (en) * 2015-11-13 2016-03-23 苏州扬佛自动化设备有限公司 Voltage boost control method of switching power supply
CN109768695A (en) * 2019-01-02 2019-05-17 海的电子科技(苏州)有限公司 Voltage and current compensation correction system and its working method based on FPGA
CN110632864A (en) * 2018-06-22 2019-12-31 罗斯蒙特公司 Analog circuit time constant compensation method for digital transmitter using analog output
CN111917304A (en) * 2020-08-10 2020-11-10 北京新雷能科技股份有限公司 Digital power supply
CN114895962A (en) * 2022-03-24 2022-08-12 扬州万方科技股份有限公司 Signal acquisition compensation method and device based on microprocessor
CN115097899A (en) * 2022-06-07 2022-09-23 北京大华无线电仪器有限责任公司 High-response power waveform simulation method
US11962239B2 (en) 2021-10-28 2024-04-16 Upi Semiconductor Corp. Control circuit of power converter and control method thereof

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CN101156123A (en) * 2005-04-04 2008-04-02 大动力公司 Digital pulse width modulation controller with preset filter coefficients

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104052486A (en) * 2013-03-12 2014-09-17 Ls产电株式会社 Method for setting offset gain of analog output module
CN104052486B (en) * 2013-03-12 2017-07-25 Ls产电株式会社 For the method for the offset gain for setting analog output module
CN105305824A (en) * 2015-11-13 2016-02-03 苏州扬佛自动化设备有限公司 Voltage boosting conversion circuit of switching power supply
CN105305851A (en) * 2015-11-13 2016-02-03 苏州扬佛自动化设备有限公司 Voltage reduction control method of switching power supply
CN105429256A (en) * 2015-11-13 2016-03-23 苏州扬佛自动化设备有限公司 Voltage boost control method of switching power supply
CN110632864A (en) * 2018-06-22 2019-12-31 罗斯蒙特公司 Analog circuit time constant compensation method for digital transmitter using analog output
CN109768695A (en) * 2019-01-02 2019-05-17 海的电子科技(苏州)有限公司 Voltage and current compensation correction system and its working method based on FPGA
CN111917304A (en) * 2020-08-10 2020-11-10 北京新雷能科技股份有限公司 Digital power supply
US11962239B2 (en) 2021-10-28 2024-04-16 Upi Semiconductor Corp. Control circuit of power converter and control method thereof
CN114895962A (en) * 2022-03-24 2022-08-12 扬州万方科技股份有限公司 Signal acquisition compensation method and device based on microprocessor
CN114895962B (en) * 2022-03-24 2024-02-06 扬州万方科技股份有限公司 Signal acquisition compensation method and device based on microprocessor
CN115097899A (en) * 2022-06-07 2022-09-23 北京大华无线电仪器有限责任公司 High-response power waveform simulation method
CN115097899B (en) * 2022-06-07 2023-11-07 北京大华无线电仪器有限责任公司 High-response power supply waveform simulation method

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Application publication date: 20120711