CN206759312U - The direct current energy transformation system that DCDC modules automatically switch - Google Patents
The direct current energy transformation system that DCDC modules automatically switch Download PDFInfo
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- CN206759312U CN206759312U CN201720064429.6U CN201720064429U CN206759312U CN 206759312 U CN206759312 U CN 206759312U CN 201720064429 U CN201720064429 U CN 201720064429U CN 206759312 U CN206759312 U CN 206759312U
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Abstract
Direct current energy transform method and system that a kind of DCDC modules automatically switch include the N number of DCDC modules being arranged in parallel, output voltage detection feedback module and the clock signal module for providing operating clock signals；Control module detects the electric current for being output to external loading, and it is Q that the DCDC module numbers for needing to open are calculated according to load current size, and exports the enabled and opening control signal of Q DCDC module；The operating clock signals CLK of Q DCDC moduleNCycle phase it is same, each operating clock signals CLKNPhase difference is 360 degree divided by Q.Multi-channel DC/DC wired in parallel, exportable larger electric current, also reduce the power consumption of system；Multi-channel DC/DC module is respectively provided with the same chip, has a good parameter consistency feature, and each road current balance characteristic is good；Timesharing soft start and phase shift Time-sharing control, avoid overshoot, reduce the ripple of electric power output voltage, and output characteristics is more stable.
Description
Technical field
The utility model belongs to direct current energy translation circuit and system；More particularly to current-mode has multiple direct currents
The direct current energy transform method and system of energy converter unit.
Background technology
The switch adjuster that prior art is usually used in dc source conversion includes BUCK mode switch adjuster, BOOST moulds
Formula switch adjuster and BUCK-BOOST mode switch adjusters, no matter the switch adjuster of that pattern, generally only all the way
DCDC translation circuits, when output current is larger, its is less efficient, heating is larger, output ripple is also larger, to the saturation of inductance
Current requirements are larger.Prior art only only has a DCDC module in an electrical conversion systems, is needing output current big
When, it is necessary to which inductance saturation current is big, the volume requirement of inductance is also big；Obviously it is no longer appropriate in portable application, by
In limiting, it is necessary to using small inductance for space, the peak point current of small inductor is smaller, is generated heat in heavy load than more serious,
Therefore the power output ratio of single DCDC modules is limited.
In order to improve load capacity, in the utility model by the way of multiple DCDC conversion modules are in parallel, system is improved
The load capacity for entirety of uniting so that system possesses the ability of output high current, also by such multiple DCDC of parallel connection mode
Reduce the power consumption of system；And multi-channel DC/DC module is respectively provided with the same chip, has good parameter consistency feature,
In steady-working state, the current balance characteristic of each road DCDC modules is good；And opened by the way that the timesharing of each DCDC modules is soft
It is dynamic, and phase shift Time-sharing control, the overshoot of output voltage or electric current when being turned on and off multi-channel DC/DC is avoided, and drop
The low ripple of electric power output voltage, output characteristics are more stable.
Because there is provided control module so that the number for the DCDC modules that system can open according to the situation adjust automatically of load
Amount, and after multiple DCDC modules are opened, the electric current between each DCDC modules can obtain good balance, the electric current between each phase
Deviation is small, and uniformity is good, also improves overall power conversion efficiency, heating is small, and the stability and reliability of whole system is good.
Explanation of nouns：
DCDC is English Direct current Direct current abbreviation, and Chinese implication is DC voltage conversion
For DC voltage；Current_mode switching DCDC implication is the direct-current switch power supply converter of current-mode；
DCDC referred to herein is the direct-current switch power supply converter of current-mode, i.e., carries out double close simultaneously using voltage and current
Ring controls, and had both employed feedback voltage and has also used feedback current progress system control；
EA is writing a Chinese character in simplified form for error amplifier, i.e. error amplifier；
OSC is writing a Chinese character in simplified form for oscillator, i.e. oscillator；
MCU is Micro Controller Unit abbreviation, and Chinese is meant that microcontroller；
The implication of BUCK mode switch adjuster in this application is the decompression DC/DC using BUCK REGULATOR modes
Translation circuit；
The implication of BOOST mode switch adjuster in this application is the decompression DC/ using BOOST REGULATOR modes
DC translation circuits；
The implication of BUCK-BOOST mode switch adjuster in this application is the liter using BUCK-BOOST topological structures
It is depressured DC/DC translation circuits；It is the not isolated DC converter that a kind of output voltage can both be less than or be higher than input voltage, but
The polarity of its output voltage is opposite with input voltage.
PWM is English Pulse Width Modulation abbreviation, and Chinese implication is pulse width modulation；Pulsewidth width
Modulation system（PWM）Switching mode mu balanced circuit be in the case where control circuit output frequency is constant, by adjusting its dutycycle, from
And reach the purpose of regulated output voltage.
Utility model content
The technical problems to be solved in the utility model is to avoid above-mentioned the deficiencies in the prior art part and propose a kind of more
The direct current energy transformation system mutually to automatically switch, when needing large load current, start automatically according to load current size necessary
The DCDC modules of quantity, the power consumption for reducing electrical conversion systems reduces heating, and make it that system is more stable, and output ripple is more
It is small.
It is the direct current energy conversion side that a kind of DCDC modules automatically switch to solve the technical scheme that above-mentioned technical problem uses
Method, comprise the following steps：
A：Parallel way sets N number of be used for input direct voltage VinIt is transformed to output voltage VoutDCDC modules, N is
The quantity of the DCDC modules, N spans are 1 to M natural number；It is provided for output voltage VoutDetect and feed back defeated
Go out voltage detecting feedback module and provide operating clock signals CLK for while for N number of DCDC modulesNClock signal module；
B：The output voltage detect feedback module sampling and outputting voltage and with the output voltage reference value V of settingref0Than
Compared with output peak value comparison method signal VC to each DCDC modules；The DCDC modules are according to peak value comparison method signal VC adjustment
Peak point current is exported so as to change output voltage Vout；
C:N number of DCDC modules receive the operating clock signals CLK for coming from the clock signal module output respectivelyN；
D:It is provided for the control module that N number of DCDC modules enable and open control；The control module detection is output to
The electric current ILoad of external loadingsen, and according to the load current ILoad detectedsenSize calculates the DCDC moulds for needing to open
Number of blocks is Q, and exports the enabled and opening control signal of corresponding Q DCDC modules；I.e. described control module is according to load electricity
Flow ILoadsenSize, the DCDC modules of varying number are controlled to be turned on and off；Make Q DCDC module output currents size and
External loading current needs are adapted；
F：The operating clock signals CLK of Q DCDC module of the clock signal module outputNCycle phase it is same, each work
Make clock signal clkNPhase difference is 360 degree divided by Q.
Solve the technical scheme that above-mentioned technical problem uses and can also be the direct current energy that a kind of DCDC modules automatically switch
Transformation system, including：It is N number of be arranged in parallel be used for input direct voltage VinIt is transformed to output voltage VoutDCDC modules, N
For the quantity of the DCDC modules, N spans are 1 to M natural number；For output voltage VoutDetection and the output of feedback
Voltage detecting feedback module；Characterized in that, the direct current energy transformation system also includes, for being simultaneously N number of DCDC modules
Operating clock signals CLK is providedNClock signal module；The control module of control is enabled and opened for N number of DCDC modules；N
Individual DCDC modules receive the operating clock signals CLK for coming from the clock signal module output respectivelyN；The control module inspection
Survey the electric current ILoad for being output to external loadingsen, and according to the load current ILoad detectedsenSize, which calculates, to be needed to open
DCDC module numbers be Q, and export the enabled and opening control signal of corresponding Q DCDC modules；I.e. described control module root
According to load current ILoadsenSize, the DCDC modules of varying number are controlled to be turned on and off；Make Q DCDC modules output electricity
Stream size and external loading current needs are adapted；The work clock letter of Q DCDC module of the clock signal module output
Number CLKNCycle phase it is same, each operating clock signals CLKNPhase difference be 360 degree divided by Q.
External inductors, DCDC modules and the external inductors composition are connected between the SW pins and ground of the DCDC modules
Complete BUCK-BOOST converters, i.e., step-down/up type converter, the step-down/up type converter are that a kind of output voltage both can be low
In the not isolated DC converter that can be also higher than input voltage, but the polarity of its output voltage is opposite with input voltage.
Certain DCDC modules can also be the power converting circuit including other implementations, such as BUCK mode switch
Adjuster either BOOST mode switch adjusters, according to the power converting circuit of different mode, the company of associated electronic components
Connect mode and also have corresponding adjustment, the sequential relationship of corresponding signal also has corresponding change, and the part is prior art, no
Repeated in the utility model.
The original state that the direct current energy transformation system is opened, the work of only the first DCDC modules；When the control mould
The load current ILoad that block detectssenMore than or equal to the threshold value of load current first, the enabled control of control module output
Signal and opening control signal open the 2nd DCDC modules to the 2nd DCDC modules；The first DCDC modules and described
Two DCDC modules obtain respective operating clock signals CLK from the clock signal module1And CLK2；The first DCDC modules
Operating clock signals CLK1With the operating clock signals CLK of the 2nd DCDC modules2Phase difference be 180 degree；When the control
The load current that molding block detects is less than the threshold value of load current first, and the control module output enables control signal and opened
Control signal is opened to the 2nd DCDC modules, closes the 2nd DCDC modules.
When the first DCDC modules and the 2nd DCDC modules all work, when the load that the control module detects
Electric current ILoadsenMore than or equal to the threshold value of load current second, the enabled control signal of control module output controls with unlatching
Signal opens the 3rd dc source modular converter to the 3rd dc source modular converter；The first DCDC modules, described
Two DCDC modules and the 3rd dc source modular converter obtain respective operating clock signals CLK from the clock signal module1、
CLK2And CLK3；The operating clock signals CLK of the first DCDC modules1With the 2nd DCDC module operating clock signals
CLK2Phase difference be 120 degree；The 2nd DCDC module operating clock signals CLK2Obtained with the 3rd dc source modular converter
Clock signal clk3Phase difference be 120 degree；As the load current ILoad that the control module detectssenLess than load electricity
The second threshold value is flowed, the control module output enables control signal and opening control signal to the 3rd dc source modulus of conversion
Block, close the 3rd dc source modular converter.
When the first DCDC modules and the 2nd DCDC modules all work, when the load that the control module detects
Electric current ILoadsenMore than or equal to the threshold value of load current the 3rd, the enabled control signal of control module output controls with unlatching
Signal makes the 3rd dc source modular converter and the 4th to the 3rd dc source modular converter and the 4th dc source modular converter
Dc source modular converter is opened；The first DCDC modules, the 2nd DCDC modules, the 3rd dc source modular converter and
4th dc source modular converter obtains respective operating clock signals CLK from the clock signal module1、CLK2、CLK3With
CLK4；The operating clock signals CLK of the first DCDC modules1With the operating clock signals CLK of the 2nd DCDC modules2's
Phase difference is 90 degree；The operating clock signals CLK of the 2nd DCDC modules2During with the work of the 3rd dc source modular converter
Clock signal CLK3Phase difference be 90 degree；The operating clock signals CLK of the 3rd dc source modular converter3With the 4th direct current
The clock signal clk that power transfer module obtains4Phase difference be 90 degree；When the load current that the control module detects is small
In the threshold value of load current the 3rd, the control module output enables control signal and opening control signal to the 3rd dc source
Modular converter and the 4th dc source modular converter, close the 3rd dc source modular converter and the 4th dc source modular converter
Close.
The control module includes being used for load current ILoadsenSampling and calculate current sampling judge module and be used for
Each DCDC modules are enabled and start the enabled with starting control module of control；Enabled exported with startup control module is used for respectively
The enabled control signal that DCDC modules enable and the soft start for each DCDC modules, the startup control signal of soft closing control arrive
Each DCDC modules；The enabled control signal is low and high level signal；The startup control signal is soft start control signal；Institute
State current sampling judge module and obtain load current signal from external loading；Or the current sampling judge module is from the DCDC
Module obtains load current signal.
The current sampling judge module includes first for load current sampled voltage and input voltage comparison operation
Operational amplifier, current source and first comparator by the control of the first opamp-output signal, the first comparator are used
Contrast computing in reference voltage signal and export enabled control signal and enabled to described with starting control module；Input voltage signal
Inputted from the positive pole of first operational amplifier, negative pole of the load current sampled voltage signal from first operational amplifier
Input；The output of first operational amplifier is used for the size of current for controlling the current source, the current source positive pole and electricity
Input electrical connection is pressed, the current source negative pole passes through resistance eutral grounding；After the current source negative pole is by low-pass filter network
The positive pole of the first comparator is input to, the voltage swing of the negative pole input signal of the first comparator is the first reference electricity
Flow threshold value；First comparator output dc/dc module select signal SEL carries out each DCDC to described enabled and startup control module
The enabled and unlatching control of module.
Described enabled and startup control module includes voltage follower, single-pole double-throw switch (SPDT), time delay network, SP3T
Switch and enabled and soft start logic controller；The single-pole double-throw switch (SPDT) includes A ends, B ends and D ends, and the SP3T is opened
Pass includes E ends, F ends, G ends and H ends；The single-pole double-throw switch (SPDT) and the SP3T switch receive the enabled and soft start
Logic controller controls；The enabled input signal with soft start logic controller includes outside enable signal EN and DCDC moulds
Block selection signal SEL；It is described enabled to include being output to the first DCDC modules and the with the output signal of soft start logic controller
The enabled and opening control signal of two DCDC modules；The amplifier anode input of the voltage follower and the output voltage
The output end electrical connection for detecting feedback module obtains feedback voltage signal；The amplifier anode input of the voltage follower simultaneously
End is electrically connected with the E ends of the SP3T switch, and the E ends of the SP3T switch are used as into the first DCDC modules
Soft start control signal lead-out terminal；When the enabled outside enable signal EN with the input of soft start logic controller has
Effect, and when selection signal SEL be low level, the B ends of the single-pole double-throw switch (SPDT) and D ends electrically connect, the SP3T switch
G ends and H ends electrical connection；The enabled enabled and unlatching that the first DCDC modules are exported with soft start logic controller is controlled
Signal processed, only described first DCDC modules, one DCDC module is for working condition；When the enabled and soft start logic control
The outside enable signal EN of device processed input is effective, and when selection signal SEL is high level, the A ends of the single-pole double-throw switch (SPDT) and D
End electrical connection, the F ends of the SP3T switch and the electrical connection of H ends；Described in the enabled and soft start logic controller output
The enabled and opening control signal of first DCDC modules and the 2nd DCDC modules；The H ends of the SP3T switch are used as
The lead-out terminal of the soft start control signal of the 2nd DCDC modules, export the soft start control letter of the 2nd DCDC modules
Number；It is when the F ends of the SP3T switch and the D terminal voltages of the voltage at H ends and the single-pole double-throw switch (SPDT) are equal, i.e., described
After the completion of 2nd DCDC module soft starts, the H ends of the SP3T switch and the electrical connection of E ends；So that the first DCDC moulds
The lead-out terminal of the soft start control signal of block and the 2nd DCDC modules exports stable voltage signal.
The control module includes microcontroller；The control module detection direct current energy transformation system is output to outer
The load current in portion, the load current size that the control module judges to detect by microcontroller, calculates needs and opens
The DCDC module numbers opened, and export the enabled and opening control signal of corresponding DCDC modules.
Compared with the existing technology compared with the beneficial effects of the utility model are：1st, using multiple DCDC translation circuit modules
Parallel way, the overall load capacity of system is improved, larger electric current can be exported；2nd, pass through such multiple DCDC's of parallel connection
Mode reduces the power consumption of system；3rd, multi-channel DC/DC is respectively provided with the same chip, has good parameter consistency feature,
When steady-working state, the current balance characteristic of each road DCDC modules is good；4th, by the timesharing soft start of each DCDC modules, with
And phase shift Time-sharing control, the overshoot of output voltage or electric current when being turned on and off multi-channel DC/DC is avoided, and reduce
The ripple of electric power output voltage, output characteristics are more stable；5th, the control module set so that system can according to the situation of load from
The quantity for the DCDC modules that dynamic adjustment is opened, and after multiple DCDC modules are opened, the electric current between each DCDC modules can obtain
Balance well, the current deviation between each phase is small, and uniformity is good, also improves overall power conversion efficiency, heating is small, whole
The stability and reliability of individual system is good.
Brief description of the drawings
Fig. 1 is the system block diagram of one of the utility model preferred embodiment；
Fig. 2 is two system block diagram of the utility model preferred embodiment, and two DCDC modules 800 are only provided with figure,
That is the first DCDC modules 801 and the 2nd DCDC modules 802；
Fig. 3 is three system block diagram of the utility model preferred embodiment, and the control module 900 in figure includes microcontroller
MCU；
Fig. 4 is the system block diagram of one of the preferred embodiment of DCDC modules 800, and figure includes load current detection module,
For load current feedback signal and the adder of sawtooth waveforms add operation, for adder output and feedback voltage contrast computing
Comparator, comparator output pwm control signal arrives logic controller, and the output of logic controller inputs through output buffering Buff
To power output metal-oxide-semiconductor, one end of power output metal-oxide-semiconductor electrically connects with input power positive pole, while power output metal-oxide-semiconductor is another
One pin SW is grounded by external inductance；Voltage after the conversion of power output metal-oxide-semiconductor output simultaneously；
Fig. 5 is the timing diagram of coherent signal in Fig. 4, and parenthetic A represents that the signal is electric current after each signal name
Signal, unit are ampere；Parenthetic parenthetic V represents that the signal is voltage signal after each signal name, and unit is volt；
Wherein IL（A）For the external inductive currents of SW；VSW（V）For the voltage signal of SW points；VC（V）It is anti-to be detected from the output voltage
Present the feedback voltage signal that module 700 obtains；PWM（V）For the input control signal of logic controller；CLK（V）To believe from clock
The clock signal that number module 300 obtains；
Fig. 6 is the first DCDC when having two DCDC modules in the direct current energy transformation system that DCDC modules automatically switch
One of the current signal of the external inductance pin of the DCDC modules 802 of module 801 and the 2nd and the timing diagram of voltage signal；Figure
The state of middle presentation is that only the first DCDC modules 801 are in running order, and the 2nd DCDC modules 802 are in the shape do not opened
State；
Fig. 7 is the first DCDC when having two DCDC modules in the direct current energy transformation system that DCDC modules automatically switch
The two of the current signal of the external inductance pin of the DCDC modules 802 of module 801 and the 2nd and the timing diagram of voltage signal；Figure
The state of middle presentation is the state that the first DCDC modules 801 and the 2nd DCDC modules 802 are in unlatching；
Fig. 8 is clock signal when having two DCDC modules in the direct current energy transformation system that DCDC modules automatically switch
The theory diagram of one of the specific embodiment of module 300；Original crystal oscillator unit OSC in figure0Export original clock signal CLK0, it is former
Beginning clock signal clk0By exporting the clock signal clk that two phase differences are 180 degree after trigger and interrelated logic computing1
And CLK2；
Fig. 9 is original clock signal clk in Fig. 80With the clock signal clk that two phase differences are 180 degree1And CLK2When
Order relation figure；
Figure 10 is when having two DCDC modules in the direct current energy transformation system that DCDC modules automatically switch, for loading
Electric current ILoadsenI.e. the first current sampling of one of specific embodiment of current sampling judge module 950 of sampling and calculating judges
The theory diagram of module 951；
Figure 11 is when having two DCDC modules in the direct current energy transformation system that DCDC modules automatically switch, for each
DCDC modules 800 it is enabled and start one of enabled specific embodiment with starting control module 960 of control i.e. first it is enabled with
Start the theory diagram of control module 961；
Figure 12 is the timing diagram of coherent signal in Figure 11；
It is visible in figure, work as SEL（V）When signal is by low uprise, the signal EN2 enabled for the 2nd DCDC modules 802（V）
Uprised by low, become to enable effective state；The soft start control signal VS2 of 2nd DCDC modules 802 simultaneously（V）Also pass through one
Uprised after the section time by low；
Work as SEL（V）When signal is by high step-down, the soft start control signal VS2 of the 2nd DCDC modules 802（V）Also pass through one
By high step-down after the section time, as soft start control signal VS2（V）When being changed into low, the signal enabled for the 2nd DCDC modules 802
EN2（V）Also by high step-down, enabled invalid state is become；The soft-start signal is the ramp voltage that an about 1mS slowly rises
Signal；Signal for soft closing is the ramp voltage signal that an about 1mS slowly declines；
For the convenience of drawing, the change procedure of a straightway, actually VS2 are present only in figure（V）Uprised from low
Can be either that linear process can also be nonlinear index variation or the change of other characteristics from the process of high step-down
Journey；So that the startup of the 2nd DCDC modules 802 or closing process are a process become slowly, rather than the step of logical signal control
Process, the overshoot of caused output voltage or electric current when switching DCDC module numbers to reduce；
Figure 13 is when having three or four DCDC modules in the direct current energy transformation system that DCDC modules automatically switch, to use
In load current ILoadsenI.e. the second electric current of the two of the specific embodiment of sampling and the current sampling judge module 950 calculated takes
The theory diagram of sample judge module 952；
Figure 14 is when having three DCDC modules in the direct current energy transformation system that DCDC modules automatically switch, for each
DCDC modules 800 it is enabled and start enabled two i.e. second with starting the specific embodiment of control module 960 of control it is enabled with
Start the theory diagram of control module 962；
Figure 15 is the timing diagram of coherent signal in Figure 14；Compared to the situation that two DCDC modules are opened in Figure 11, figure
When multiple DCDC modules are opened in 14, the unlatching SECO of modules is soft start successively, switches DCDC moulds to reduce
The overshoot of caused output voltage or electric current during number of blocks；
Figure 16 is four system block diagram of the utility model preferred embodiment.
Embodiment
Embodiment of the present utility model is further described below in conjunction with each accompanying drawing.
The direct current energy transform method that a kind of DCDC modules as shown in Figure 1 automatically switch, comprises the following steps：
A：It is arranged in parallel N number of be used for input direct voltage VinIt is transformed to output voltage VoutDCDC modules 800, N is institute
The quantity of DCDC modules 800 is stated, N spans are 1 to M natural number；It is provided for output voltage VoutDetect and feed back defeated
Go out voltage detecting feedback module 700 and provide operating clock signals CLK for while for N number of DCDC modules 800NClock signal
Module 300；M numerical value can be any one numerical value between 2 to 100, certainly more commonly used M value be 2,3,4,6,
8 and 10；
B：The output voltage detect the sampling and outputting voltage of feedback module 700 and with the output voltage reference value V of settingref0
Compare, output peak value comparison method signal VC to each DCDC modules 800；The DCDC modules 800 are believed according to peak value comparison method
Number VC adjustment output peak point current is so as to changing output voltage Vout；
C:N number of DCDC modules 800 receive to come from the operating clock signals that the clock signal module 300 exports respectively
CLKN；
D:It is provided for the control module 900 that N number of DCDC modules 800 enable and open control；The control module 900 is examined
Survey the electric current ILoad for being output to external loadingsen, and according to the load current ILoad detectedsenSize, which calculates, to be needed to open
The quantity of DCDC modules 800 be Q, and export the enabled and opening control signal of corresponding Q DCDC modules 800；I.e. described control
Module 900 is according to load current ILoadsenSize, the DCDC modules 800 of varying number are controlled to be turned on and off；Make Q
The output current size of DCDC modules 800 and external loading current needs are adapted；Q numerical value is less than or equal to M, can be even number
It can be odd number；
F：The operating clock signals CLK for the Q DCDC module 800 that the clock signal module 300 exportsNCycle phase
Together, each operating clock signals CLKNPhase difference is 360 degree divided by Q.
In the above-mentioned methods, the output electricity after the output voltage detection sampling and outputting voltage of feedback module 700 with setting
Pressure reference value compares, output peak value comparison method signal to each DCDC modules 800；The DCDC modules 800 are according to peak point current
Control signal adjustment exports peak point current so as to change output voltage.Due to by the way of multiple DCDC wired in parallel, effectively
Reduce the power consumption of system so that the system power dissipation of the direct current energy transform method to be automatically switched using this kind of DCDC module is dropped
It is low, when mitigating heavy duty application, the problem of system heat generation is big.
Especially when each DCDC modules are to set multiple DCDC modules on a single die, not only by simultaneously
The mode of connection reduces the power consumption of DCDC modules in itself；The uniformity of the equivalent impedance property of each DCDC modules is good, therefore loads
Electric current can be here divided evenly over each different DCDC modules；Different DCDC moulds are used as using the clock signal of same period
The basis signal of the switch control of block 800, each DCDC modules 800 both can guarantee that the uniformity of work rhythm, and and can passes through clock
The phase difference of signal so that the peak point current of output the different time sections of same period cause peak point current more it is steady and
Weighing apparatus, reduce the ripple of system output voltage.
The direct current energy transformation system that a kind of DCDC modules as shown in Figure 1 automatically switch, including：It is N number of to be arranged in parallel
For by input direct voltage VinIt is transformed to output voltage VoutDCDC modules 800, N be the DCDC modules 800 quantity, N
Span is 1 to M natural number；For output voltage VoutThe output voltage of detection and feedback detection feedback module 700；Institute
Stating direct current energy transformation system also includes, for providing operating clock signals CLK simultaneously for N number of DCDC modules 800NClock letter
Number module 300；The control module 900 of control is enabled and opened for N number of DCDC modules 800；N number of DCDC modules 800 connect respectively
By the operating clock signals CLK for coming from the output of clock signal module 300N；The detection of control module 900 is output to outer
The electric current ILoad of section loadsen, and according to the load current ILoad detectedsenSize calculates the DCDC modules for needing to open
800 quantity are Q, and export the enabled and opening control signal of corresponding Q DCDC modules 800；The i.e. described basis of control module 900
Load current ILoadsenSize, the DCDC modules 800 of varying number are controlled to be turned on and off；Make Q DCDC module 800 defeated
Go out size of current and external loading current needs are adapted；The Q DCDC module 800 that the clock signal module 300 exports
Operating clock signals CLKNCycle phase it is same, each operating clock signals CLKNPhase difference be 360 degree divided by Q.Wherein M numerical value
Can be any one numerical value between 2 to 100, certainly more commonly used M value is 2,3,4,6,8 and 10；Q numerical value is small
Can be that even number can also be odd number in equal to M.
As shown in Fig. 2 external inductors, the DCDC modules are connected between the SW pins and ground of the DCDC modules 800
800 and external inductors form complete BUCK-BOOST converters, i.e. step-down/up type converter, the step-down/up type converter is one
Kind output voltage can both be less than or the not isolated DC converter higher than input voltage, but the polarity of its output voltage and input
Voltage is opposite.For the simplicity of figure in Fig. 1 and Fig. 3, external inductors are eliminated.
As shown in fig. 6, the original state that the direct current energy transformation system is opened, only the first DCDC modules 801 work.
As shown in Fig. 7 to 12, as the load current ILoad that the control module 900 detectssenMore than or equal to load current first
Limit value, the output of control module 900 enable control signal and opening control signal to the 2nd DCDC modules 802, make second
DCDC modules 802 are opened.It is described when the load current that the control module 900 detects is less than the threshold value of load current first
The enabled control signal of the output of control module 900 and opening control signal make the 2nd DCDC modules 802 to the 2nd DCDC modules 802
Close.
As shown in Figure 8-9, the first DCDC modules 801 and the 2nd DCDC modules 802 are from the clock signal mould
Block 300 obtains respective operating clock signals CLK1And CLK2；The operating clock signals CLK of the first DCDC modules 8011With
The operating clock signals CLK of the 2nd DCDC modules 8022Phase difference be 180 degree.
As shown in Figure 13 to 15, when the first DCDC modules 801 and the 2nd DCDC modules 802 all work, work as institute
State the load current ILoad that control module 900 detectssenMore than or equal to the threshold value of load current second, the control module
The enabled control signal of 900 outputs and opening control signal change the 3rd dc source to the 3rd dc source modular converter 803
Module 803 is opened；The first DCDC modules 801, the 2nd DCDC modules 802 and the 3rd dc source modular converter 803
Respective operating clock signals CLK is obtained from the clock signal module 3001、CLK2And CLK3；The first DCDC modules 801
Operating clock signals CLK1With the operating clock signals CLK of the 2nd DCDC modules 8022Phase difference be 120 degree；Described
The operating clock signals CLK of two DCDC modules 8022The clock signal clk obtained with the 3rd dc source modular converter 8033Phase
Difference is 120 degree；As the load current ILoad that the control module 900 detectssenIt is described less than the threshold value of load current second
The enabled control signal of the output of control module 900 and opening control signal make the 3rd direct current to the 3rd dc source modular converter 803
Power transfer module 803 is closed.
In some embodiments unshowned in the accompanying drawings, the first DCDC modules 801 and the 2nd DCDC modules 802
When all working, as the load current ILoad that the control module 900 detectssenMore than or equal to the threshold value of load current the 3rd,
The output of control module 900 enables control signal and opening control signal to the 3rd dc source modular converter 803 and the 4th
Dc source modular converter 804, open the 3rd dc source modular converter 803 and the 4th dc source modular converter 804；Institute
State the first DCDC modules 801, the 2nd DCDC modules 802, the 3rd dc source modular converter 803 and the 4th dc source turn
Mold changing block 804 obtains respective operating clock signals CLK from the clock signal module 3001、CLK2、CLK3And CLK4；It is described
The operating clock signals CLK of first DCDC modules 8011With the operating clock signals CLK of the 2nd DCDC modules 8022Phase
Difference is 90 degree；The operating clock signals CLK of the 2nd DCDC modules 8022With the work of the 3rd dc source modular converter 803
Clock signal clk3Phase difference be 90 degree；The operating clock signals CLK of the 3rd dc source modular converter 8033With the 4th
The clock signal clk that dc source modular converter 804 obtains4Phase difference be 90 degree；Detected when the control module 900
Load current is less than the threshold value of load current the 3rd, and the output of control module 900 enables control signal and opening control signal
To the 3rd dc source modular converter 803 and the 4th dc source modular converter 804, make the 3rd dc source modular converter 803
Closed with the 4th dc source modular converter 804.
As shown in Figures 1 to 3, the control module 900 includes being used for load current ILoadsenSampling and the electric current calculated take
Sample judge module 950 and the enabled and startup control module 960 that control is enabled and started for each DCDC modules 800；It is described to make
The enabled control signal enabled for each DCDC modules 800 can be exported with starting control module 960 and for each DCDC modules 800
Soft start, the startup control signal of soft closing control is to each DCDC modules 800；The enabled control signal is believed for low and high level
Number；The startup control signal is soft start control signal；The current sampling judge module 950 is loaded from external loading
Current signal；Or the current sampling judge module 950 obtains load current signal from the DCDC modules 800.
As shown in Figure 10, the current sampling judge module 950 includes being used for load current sampled voltage and input voltage
First operational amplifier 606 of comparison operation, the current source 607 and first controlled by the output signal of the first operational amplifier 606
Comparator 608, the first comparator 608 is used for reference voltage signal contrast computing and the enabled control signal of output makes described in
Can be with starting control module 960；Input voltage signal is inputted from the positive pole of first operational amplifier 606, and load current is adopted
Sample voltage signal inputs from the negative pole of first operational amplifier 606；The output of first operational amplifier 606 is used to control
The size of current of the current source 607 is made, the positive pole of current source 607 electrically connects with voltage input end, and the current source 607 is negative
Pole passes through resistance eutral grounding；The negative pole of current source 607 is by being input to the first comparator 608 after low-pass filter network
Positive pole, the voltage swing of the negative pole input signal of the first comparator 608 is voltage corresponding to the first reference current threshold value；
The selection signal SEL of 608 output dc/dc module of first comparator 800 carries out each DCDC to described enabled and startup control module 960
The enabled and unlatching control of module 800.
As shown in figure 11, described enabled and startup control module 960 includes voltage follower 601, single-pole double-throw switch (SPDT)
S1, time delay network 605, SP3T switch S2 and enabled and soft start logic controller 602；The single-pole double-throw switch (SPDT) S1 bags
A ends, B ends and D ends are included, the SP3T switch S2 includes E ends, F ends, G ends and H ends；The single-pole double-throw switch (SPDT) S1 and institute
Described enable of SP3T switch S2 receiving is stated to control with soft start logic controller 602；The enabled and soft start logic control
The input signal of device 602 processed includes the outside enable signal EN and selection signal SEL of DCDC modules 800；The enabled and soft start
The output signal of logic controller 602 includes being output to the enabled and unlatching of the first DCDC modules 801 and the 2nd DCDC modules 802
Control signal；The amplifier anode input of the voltage follower 601 is defeated with output voltage detection feedback module 700
Go out end electrical connection and obtain feedback voltage signal；The amplifier anode input of the voltage follower 601 and the hilted broadsword simultaneously
Three throw switch S2 E ends electrical connection, and the E ends of the SP3T switch S2 are used as the soft of the first DCDC modules 801
Start the lead-out terminal of control signal.
When described enabled effective with the outside enable signal EN of the input of soft start logic controller 602, and selection signal SEL
For low level when, the B ends of the single-pole double-throw switch (SPDT) S1 and D ends electrical connection, the G ends of the SP3T switch S2 and H ends electricity
Connection；The enabled enabled and unlatching control letter that the first DCDC modules 801 are exported with soft start logic controller 602
Number, only described first DCDC modules, 801 1 DCDC modules are for working condition.
When described enabled effective with the outside enable signal EN of the input of soft start logic controller 602, and selection signal SEL
For high level when, the A ends of the single-pole double-throw switch (SPDT) S1 and D ends electrical connection, the F ends of the SP3T switch S2 and H ends electricity
Connection；The enabled and soft start logic controller 602 exports the first DCDC modules 801 and the 2nd DCDC modules
802 enabled and opening control signal；The H ends of the SP3T switch S2 are used as the 2nd the soft of DCDC modules 802 and opened
The lead-out terminal of dynamic control signal, export the soft start control signal of the 2nd DCDC modules 802；When the SP3T is opened
When closing S2 F ends and the voltage at H ends and the equal D terminal voltages of the single-pole double-throw switch (SPDT) S1, i.e., described 2nd DCDC modules 802
After the completion of soft start, the H ends of the SP3T switch S2 and the electrical connection of E ends；So that the first DCDC modules 801 and described
The lead-out terminal of the soft start control signal of 2nd DCDC modules 802 exports stable voltage signal.
As shown in figure 3, the control module 900 includes microcontroller；The control module 900 detects direct current energy
Transformation system is output to the load current of outside, the load electricity that the control module 900 judges to detect by microcontroller
Size is flowed, calculates the quantity of DCDC modules 800 for needing to open, and exports the enabled of corresponding DCDC modules 800 and opens control
Signal.
First DCDC modules 801 as shown in Figure 2 include being used for the power input pin with external input power connection
Vin1, for making the power supply output pin Vout of voltage output after voltage transformation1, for controlling the first DCDC modules 801 enabled
Enabled pin EN1, for controlling the soft start voltage controlling switch VS of the soft start of the first DCDC modules 8011, for providing the
The clock signal input pin CLK of the clock signal of one DCDC modules 8011, for controlling the first DCDC modules output peak point current
Voltage control pin VCin1；2nd DCDC modules 802 as shown in Figure 2 include being used for the electricity with external input power connection
Source input pin Vin2, for making the power supply output pin Vout of voltage output after voltage transformation2, for the 2nd DCDC modules
802 enabled enabled pin EN2, for controlling the soft start voltage controlling switch VS of the soft start of the 2nd DCDC modules 8022, it is used for
The clock signal input pin CLK of SMPS2 clock signals is provided2, for controlling the 2nd DCDC modules 802 output peak point current
Voltage control pin VCin2。
The control circuit submodule (90) as shown in Figure 2 enables control signal output including the first DCDC modules 801
Pin EN1, the soft starting control electric of the first DCDC modules 801 pressure output pin VS1；It is defeated that 2nd DCDC modules 802 enable control signal
Go out pin EN2, the soft starting control electric of the 2nd DCDC modules 802 pressure output pin VS2。
The clock signal module 300 as shown in Figure 8 is CLK including two-way clock signal output pin1、CLK2, and point
The first DCDC modules 801 and the 2nd DCDC modules 802, CLK are not connected to1And CLK2Phase difference is 180o, i.e. two-way DCDC's
Phase difference is 180o；By staggering 180 oPhase so that output voltage ripple becomes smaller, and output voltage is more stable.CLK1、
CLK2Divided and produced by a basic clock signal, to ensure that the working frequency of two-way is consistent, so as to reduce two-way
Between state difference, match two-way, especially match the peak point current of two-way.
Output voltage detection feedback module 700 as shown in Figure 2 is using the output voltage sampling value detected as electricity
Feedback signal is pressed to be sent into an error amplifier EA input.The error amplifier EA includes control two-way output peak value electricity
The output current controlling switch VC of stream；An error amplifier EA input is connected with voltage feedback signal, another input
End and default reference voltage Vref0Connection.When output voltage absolute value is than default reference voltage Vref0Hour, the error is put
Big device EA output voltage VC rises so that the output current ability of the first DCDC modules 801 and the 2nd DCDC modules 802 increase
So that output voltage is withdrawn into preset value；Conversely, when output voltage absolute value is more than preset value, VC is reduced, the first DCDC moulds
The output current ability of the DCDC modules 802 of block 801 and the 2nd reduces so that output voltage is withdrawn into preset value.Because two-way shares
Same peak value comparison method signal VC, then the peak point current matching of two-way is preferable, i.e., the inductance peak point current matching of two-way compared with
It is good so that whole system is more stable, more efficient, reliability is higher.
The first DCDC modules 801 are connected with the power input pin of the 2nd DCDC modules 802；The first DCDC moulds
Block 801 is connected with the power supply output pin of the 2nd DCDC modules 802；The output current controlling switch phase of the two-way DCDC modules
The output current controlling switch connection of error amplifier EA described in Lian Bingyu；The enabled pin EN of the first DCDC modules 8011
It is connected with the enabled control signal output pin of the control module 900；The soft start control of the first DCDC modules 801 is drawn
Pin VS1It is connected with the soft starting control electric pressure output pin of the control module 900；The clock of the first DCDC modules 801
Signal input pin CLK1It is connected with the clock signal output pin of the clock signal module 300 and obtains clock signal clk 1.
The enabled pin EN of the 2nd DCDC modules 8022Enabled control signal output with the control module 900 is drawn
Pin connects；The voltage control pin VS of the soft start of 2nd DCDC modules 8022With the soft start control of the control module 900
Voltage output pin connection processed；The clock signal input pin CLK of the 2nd DCDC modules 8022Believe with the clock
The clock signal output pin connection of number module 300 obtains clock signal clk 2；Two-way DCDC modules share same output electricity
Peak control signal is flowed, and the clock signal source of two-way two-way DCDC modules is in same clock-signal generator so that
When two-way DCDC modules work simultaneously, the working condition of two-way matches the system as far as possible, and the output current of two-way is basic
Equal, whole circuit system is in the working condition of a comparison optimization, and efficiency is higher, reliability is preferable.
It is one of the preferred embodiment of DCDC modules theory diagram as shown in Figure 4, it includes adder, comparator, logic
Controller, driving buffer and power tube；Except this kind of implementation, DCDC modules can also be the DCDC of other current-modes
A kind of implementation of module, it is not limited to this theory diagram of DCDC modules.Have per road DCDC modules caused by inside
Inspection stream signal Isense and slope compensation signal Vsaw, adder is Vsum the two analog signal additional combinings, comparator
Vsum and VC are compared, when Vsum is higher than VC, comparator sends the PWM of a high level, if pwm signal is height,
Logic controller exports shutdown signal, closes after the switching tube inside power mos and beats after buffer enhancing of overdriving
Open continued flow tube.Because switching tube is turned off, inspection stream signal Isense is changed into 0 so that pwm signal is changed into low；Due in afterflow shape
State, inductance both ends pressure difference are negative value, and inductive current is gradually reduced.When next time, clock signal is come temporarily, and logic controller is defeated
Go out opening signal, closed after buffer enhancing of overdriving after the continued flow tube inside power mos and open switching tube.Due to
Switching tube is opened, and inductive current is begun to ramp up, while Isense has the inspection stream signal more than 0, when inductive current reaches some
During threshold value（The threshold value is determined by VC, and VC height is influenceed by input voltage, output voltage, load current etc.）,
Vsum reaches VC values, and comparator 502 sends PWM high RSTs, is again switched off opening after the switching tube inside power mos505
Continued flow tube.So circulation forms the automatic DCDC module switch control for adapting to load current change.
It is the enabled theory diagram with soft start control module in specific embodiment as shown in figure 11.It includes computing and put
Big device 601, enable and logic controller 602, switch S1 (603), switch S2604, RC wave filters 605.When enable signal EN is
When high and selection signal SEL is low, i.e., when load is underloading, EN1=1, EN2=0, now only the first DCDC modules 801 work,
2nd DCDC modules 802 do not work.VS1=VC, A point voltage VA=VC；B points voltage is 0, switch S1 selection connection B points, i.e. VD=
0；E points voltage is VE=VC, and F points voltage is that 0, G points voltage is 0, switch S2 selection connection G points, i.e. VS2=VH=0.
When enable signal EN be high and selection signal SEL also redirect for it is high when, i.e., load for it is heavily loaded when, EN1=1, EN2=1；
S1 D point selections connection A points are switched, Simultaneous Switching S2 H point selections connect F points, then VD=VC, VS2=VH=VF.And due to RC
The filtering of wave filter 605 and time-lag action, VF slowly rise, through after a period of time, such as 1ms, VF rise to it is equal with VD,
That is after VH=VF=VD=VA=VC, enabled and logic controller 602, which sends signal, makes switch S2 selection connection E points, i.e. VS2=VH=VE
=VC, soft start are completed；First DCDC modules 801 and the 2nd DCDC modules 802 all enter normal operating conditions.
When EN be high and selection signal SEL from height redirect for it is low when, EN1=1 during original state, EN2=1, switch S1 D points
Selection connection B points, Simultaneous Switching S2 H point selections connect F points, then VD=VB=0, VH=VF.Due to the filtering of RC wave filters 605
And time-lag action, VF slowly decline, through after a period of time, such as 1ms, VF drop to 0, i.e. VF=VD=VB=0.Enable afterwards
Sending signal with logic controller 602 makes switch S2 H point selections be connected G points, i.e. VS2=VH=VG=0, while causes EN2=0,
Soft close is completed.Only have the first DCDC modules 801 to work afterwards, the 2nd DCDC modules 802 do not work.
It is the theory diagram of current sampling judge module in specific embodiment as shown in Figure 10.It includes operational amplifier
606, controlled current source 607 and comparator 608.Operational amplifier 606 is according to VIN and ILoadsenDifference output control signal
Controlled current source 607 is controlled, the electric current of controlled current source flows through resistance Rsen and obtains Vsen after RC filtering again, thus
The voltage Vsen proportional to load current to one.Work as Vsen<During Vref1, chip operation is in light condition, SEL=0；When
Vsen>During Vref1, chip operation is in the state that focuses on, SEL=1.Vref1 is an electricity related to the threshold value of load current first
Pressure value.
It is the OSC of specific embodiment internal frame diagram as shown in Figure 8.Including basic oscillator OSC0701, d type flip flop 702
With two and door.Oscillator OSC0701 continuously send out pulse clock signal CLK0, are obtained after being divided by d type flip flop 702 anti-phase
Two signals exported from Q, QN, this two signal again with CLK0 phases and, the CLK1 and CLK2 needed, during due to being same
Zhong Yuan obtains by frequency dividing, so CLK1 with CLK2 frequencies are identical, phase difference is 180 degree.It is that this practicality is new as shown in Figure 9
The internal signal waveforms figure of OSC modules in type preferred embodiment.
As seen in figs, when system load is light, i.e. Iload<Iref1When, circuit is operated in single-phase transformation output mould
Formula, i.e. an only DCDC modules job.Now, the first DCDC modules 801 have normal switch motion to give inductance L1 discharge and recharges
To provide output current to output end, SW1 points switch between height, and inductance L1 has discharge and recharge.2nd DCDC modules 802 not work
Make, SW2 points are high resistant point, and inductance L2 is without discharge and recharge, IL2=0.
As shown in figs. 2 and 7, when system load is heavy, i.e. Iload>Iref1When, circuit is operated in two-phase transformation output mould
Formula, and the phase difference between two-way DCDC modules is 180 degree.Now, the first DCDC modules 801 and the 2nd DCDC modules 802 be all
There is normal switch motion to each self-inductance discharge and recharge to provide output current to output end, SW1 points switch between height, L1
There is discharge and recharge, SW2 points switch between height, and L2 also has discharge and recharge.
In the power converting circuit application example that a kind of two-phase as shown in Figure 2 automatically switches, the two-way DCDC modules
It is integrated in same integrated circuit.Moreover, two-way DCDC modules and the control module 900 can be integrated in same
In integrated circuit.I.e. in the above-described embodiments, this partial circuit of the two-way DCDC modules and the control module 900 is to do
On the same chip, two-way DCDC modules have actually shared many identical parts, further to reduce chip face
Product.
The other embodiment for the power converting circuit system that a kind of DCDC modules as shown in figs. 1 and 3 automatically switch
In, described how each DCDC modular converters DCDC1, DCDC2 is until DCDCN is each independent integrated circuit.The DCDC turns
It can be commercially available any a voltage changer to change the mold block.Certain described how each DCDC modular converters DCDC1, DCDC2 are always
It can also be all integrated in DCDCN in same chip, common parts, improve the uniformity of circuit characteristic.
In the other embodiment for the power converting circuit that a kind of multiphase as shown in Figure 1 automatically switches, the control
The current sampling judge module 950 of module 900 can be independent inspection stream judge module or be integrated in certain integrated circuit
The submodule of the inside；The load detecting pin of the current sampling judge module 950 of the control module 900 can be integrated in collection
Electric current is directly detected inside into circuit, detection electric current outside integrated circuit can also be connected to.
It is described in the other embodiment for the power converting circuit that a kind of DCDC modules as shown in Figure 1 automatically switch
It is enabled to remove with soft start control module 960, then coordinate extra MCU to control multi-channel DC/DC module coordination to work.Become
As shown in figure 3, detecting load current by current sampling judge module 950 after change, corresponding signal is issued MCU afterwards, then
Each road DCDC modules are controlled by MCU, coordinate the work of each road DCDC modules.
All it is operated in always even in some Application Examples as shown in figure 16, when due to systems most larger negative
It in the case of load, at this moment can remove whole control module 900, the enabled input pin of each road DCDC modules is uniformly connected to be
The enabled input of system is directly connected to power input.Now, due to having shared same VC and same OSC, system
In the case of heavy load being operated in well, the transformation output of efficient stable high reliability is realized.
The direct current energy transform method and system that a kind of DCDC modules involved by the utility model automatically switch include
The N number of DCDC modules being arranged in parallel, output voltage detection feedback module and the clock signal module that operating clock signals are provided；Control
Molding block detects the electric current for being output to external loading, and the DCDC module numbers for needing to open are calculated according to load current size
For Q, and export the enabled and opening control signal of Q DCDC module；The operating clock signals CLK of Q DCDC moduleNCycle
It is identical, each operating clock signals CLKNPhase difference is 360 degree divided by Q.Multi-channel DC/DC wired in parallel, exportable larger electric current,
Also reduce the power consumption of system；Multi-channel DC/DC module is respectively provided with the same chip, has good parameter consistency feature, respectively
Road current balance characteristic is good；Timesharing soft start and phase shift Time-sharing control, avoid overshoot, reduce the line of electric power output voltage
Ripple, output characteristics are more stable.
The power converting circuit system that the DCDC modules that the utility model is related to automatically switch includes：Multichannel is used for will input
Power transfer module DCDC1, DCDC2 ... the DCDCN of voltage transformation output and the control for controlling each DCDC voltage transformation modules
Molding block 900.Control circuit submodule (900) is according to the load current I detectedLoadsenOutput a control signal to DCDC1,
DCDC2 ... DCDCN voltage transformation modules so that in heavy load, using two-way/multi-channel DC/DC modular converter DCDC1,
DCDC2 ... DCDCN take into account the voltage transformation of each road current balance type；In small load or zero load, only using DCDC all the way
Module carries out voltage transformation；Heavy duty Shi Ge road current balance types are taken into account and voltage transformation efficiency high, system heat generation are small, export
Ripple is small, system reliability is high and transforming circuit in itself low in energy consumption during light load, and the output voltage especially suitable for battery becomes
Change in control circuit.
It is another it should be noted that, battery or the zero-potential point that the negative pole in externally fed source is circuit, this reality in the utility model
Potential value with other circuit nodes in new is all the numerical value of the relative zero-potential point；Battery or externally fed source voltage are
The potential difference of its positive pole and negative pole.For convenience, part of module employs one, second-class serial number, these serial numbers
Its position or restriction sequentially are not represented, it is convenient to be intended merely to description.
Embodiment of the present utility model is the foregoing is only, above-described circuit topological structure is only of the present utility model
A kind of specific embodiment, the scope of the claims of the present utility model is not thereby limited, it is every to utilize utility model specification and accompanying drawing
The equivalent structure or equivalent flow conversion that content is made, or other related technical areas are directly or indirectly used in, similarly
It is included in scope of patent protection of the present utility model.
Claims (9)
1. the direct current energy transformation system that a kind of DCDC modules automatically switch, including：
It is N number of be arranged in parallel be used for input direct voltage VinIt is transformed to output voltage VoutDCDC modules（800）, N is described
DCDC modules（800）Quantity, N spans be 1 to M natural number；For output voltage VoutDetection and the output of feedback electricity
Pressure detection feedback module（700）；
Characterized in that, the direct current energy transformation system also includes, for being simultaneously N number of DCDC modules（800）Work is provided
Clock signal clkNClock signal module（300）；For N number of DCDC modules（800）Control module that is enabled and opening control
（900）；N number of DCDC modules（800）Receive to come from the clock signal module respectively（300）The operating clock signals of output
CLKN；
The control module（900）Detection is output to the electric current ILoad of external loadingsen, and according to the load current detected
ILoadsenSize calculates the DCDC modules for needing to open（800）Quantity is Q, and exports corresponding Q DCDC modules（800）'s
Enabled and opening control signal；I.e. described control module（900）According to load current ILoadsenSize, control varying number
DCDC modules（800）Be turned on and off；Make Q DCDC module（800）Output current size and external loading current needs phase
Adapt to；
The clock signal module（300）Q DCDC module of output（800）Operating clock signals CLKNCycle phase it is same, respectively
Operating clock signals CLKNPhase difference be 360 degree divided by Q.
2. the direct current energy transformation system that DCDC modules automatically switch according to claim 1, it is characterised in that：
The DCDC modules（800）SW pins and ground between be connected with external inductors, the DCDC modules（800）And external electrical
Sense forms complete BUCK-BOOST converters, i.e., step-down/up type converter, the step-down/up type converter are a kind of output voltages
Both the not isolated DC converter of input voltage can be less than or be higher than, but the polarity of its output voltage is opposite with input voltage.
3. the direct current energy transformation system that DCDC modules automatically switch according to claim 2, it is characterised in that：
The original state that the direct current energy transformation system is opened, only the first DCDC modules（801）Work；When the control mould
Block（900）The load current ILoad detectedsenMore than or equal to the threshold value of load current first, the control module（900）It is defeated
Go out enabled control signal and opening control signal to the 2nd DCDC modules（802）, make the 2nd DCDC modules（802）Open；
The first DCDC modules（801）With the 2nd DCDC modules（802）From the clock signal module（300）Obtain each
From operating clock signals CLK1And CLK2；The first DCDC modules（801）Operating clock signals CLK1With described second
DCDC modules（802）Operating clock signals CLK2Phase difference be 180 degree；
When the control module（900）The load current detected is less than the threshold value of load current first, the control module
（900）Output enables control signal and opening control signal to the 2nd DCDC modules（802）, make the 2nd DCDC modules（802）Close
Close.
4. the direct current energy transformation system that DCDC modules automatically switch according to claim 3, it is characterised in that：
The first DCDC modules（801）With the 2nd DCDC modules（802）When all working, when the control module（900）
The load current ILoad detectedsenMore than or equal to the threshold value of load current second, the control module（900）The enabled control of output
Signal processed and opening control signal open the 3rd dc source modular converter to the 3rd dc source modular converter；
The first DCDC modules（801）, the 2nd DCDC modules（802）With the 3rd dc source modular converter from it is described when
Clock signaling module（300）Obtain respective operating clock signals CLK1、CLK2And CLK3；The first DCDC modules（801）Work
Make clock signal clk1With the 2nd DCDC modules（802）Operating clock signals CLK2Phase difference be 120 degree；Described second
DCDC modules（802）Operating clock signals CLK2The clock signal clk obtained with the 3rd dc source modular converter3Phase difference
For 120 degree；
When the control module（900）The load current ILoad detectedsenLess than the threshold value of load current second, the control
Module（900）The enabled control signal of output and opening control signal make the 3rd dc source to the 3rd dc source modular converter
Modular converter is closed.
5. the direct current energy transformation system that DCDC modules automatically switch according to claim 4, it is characterised in that：
The first DCDC modules（801）With the 2nd DCDC modules（802）When all working, when the control module（900）
The load current ILoad detectedsenMore than or equal to the threshold value of load current the 3rd, the control module（900）The enabled control of output
Signal processed and opening control signal make the 3rd direct current to the 3rd dc source modular converter and the 4th dc source modular converter
Source modular converter and the 4th dc source modular converter are opened；
The first DCDC modules（801）, the 2nd DCDC modules（802）, the 3rd dc source modular converter and the 4th straight
Power transfer module is flowed from the clock signal module（300）Obtain respective operating clock signals CLK1、CLK2、CLK3With
CLK4；The first DCDC modules（801）Operating clock signals CLK1With the 2nd DCDC modules（802）Work clock
Signal CLK2Phase difference be 90 degree；The 2nd DCDC modules（802）Operating clock signals CLK2Turn with the 3rd dc source
Change the mold the operating clock signals CLK of block3Phase difference be 90 degree；The operating clock signals of the 3rd dc source modular converter
CLK3The clock signal clk obtained with the 4th dc source modular converter4Phase difference be 90 degree；
When the control module（900）The load current detected is less than the threshold value of load current the 3rd, the control module
（900）Output enables control signal and opening control signal to the 3rd dc source modular converter and the 4th dc source modulus of conversion
Block, close the 3rd dc source modular converter and the 4th dc source modular converter.
6. the direct current energy transformation system that DCDC modules automatically switch according to claim 1, it is characterised in that：
The control module（900）Including for load current ILoadsenSampling and the current sampling judge module calculated（950）
With for each DCDC modules（800）It is enabled and startup control enabled with starting control module（960）；
It is described enabled with starting control module（960）Export and be used for each DCDC modules（800）Enabled enabled control signal and use
In each DCDC modules（800）Soft start, the startup control signal of soft closing control is to each DCDC modules（800）；It is described enabled
Control signal is low and high level signal；The startup control signal is soft start control signal；
The current sampling judge module（950）Load current signal is obtained from external loading；Or the current sampling judges mould
Block（950）From the DCDC modules（800）Obtain load current signal.
7. the direct current energy transformation system that DCDC modules automatically switch according to claim 6, it is characterised in that：
The current sampling judge module（950）Including first for load current sampled voltage and input voltage comparison operation
Operational amplifier（606）, by the first operational amplifier（606）The current source of output signal control（607）And first comparator
（608）, the first comparator（608）Computing, which is contrasted, for reference voltage signal and exports enabled control signal is enabled to described
With starting control module（960）；
Input voltage signal is from first operational amplifier（606）Positive pole input, load current sampled voltage signal is from institute
State the first operational amplifier（606）Negative pole input；First operational amplifier（606）Output be used for control the electric current
Source（607）Size of current, the current source（607）Positive pole electrically connects with voltage input end, the current source（607）Negative pole leads to
Cross resistance eutral grounding；The current source（607）Negative pole is by being input to the first comparator after low-pass filter network（608）'s
Positive pole, the first comparator（608）The voltage swing of negative pole input signal be the first reference current threshold value；First compares
Device（608）Output dc/dc module（800）Selection signal SEL is enabled with starting control module to described（960）Carry out each DCDC moulds
Block（800）It is enabled and open control.
8. the direct current energy transformation system that DCDC modules automatically switch according to claim 6, it is characterised in that：
It is described enabled with starting control module（960）Including voltage follower（601）, single-pole double-throw switch (SPDT)（S1）, time delay network
（605）, SP3T switch（S2）With enabled and soft start logic controller（602）；The single-pole double-throw switch (SPDT)（S1）Including A
End, B ends and D ends, the SP3T switch（S2）Including E ends, F ends, G ends and H ends；
The single-pole double-throw switch (SPDT)（S1）With the SP3T switch（S2）Receive the enabled and soft start logic controller
（602）Control；
The enabled and soft start logic controller（602）Input signal include outside enable signal EN and DCDC modules
（800）Selection signal SEL；The enabled and soft start logic controller（602）Output signal include be output to the first DCDC
Module（801）With the 2nd DCDC modules（802）Enabled and opening control signal；
The voltage follower（601）Amplifier anode input and the output voltage detection feedback module（700）It is defeated
Go out end electrical connection and obtain feedback voltage signal；The voltage follower simultaneously（601）Amplifier anode input with it is described
SP3T switch（S2）The electrical connection of E ends, and by the SP3T switch（S2）E ends be used as the first DCDC modules
（801）Soft start control signal lead-out terminal；
When the enabled and soft start logic controller（602）The outside enable signal EN of input is effective, and selection signal SEL is
During low level, the single-pole double-throw switch (SPDT)（S1）B ends and D ends electrical connection, the SP3T switch（S2）G ends and H ends
Electrical connection；The enabled and soft start logic controller（602）Export the first DCDC modules（801）It is enabled and open control
Signal processed, only described first DCDC modules（801）One DCDC module is for working condition；
When the enabled and soft start logic controller（602）The outside enable signal EN of input is effective, and selection signal SEL is
During high level, the single-pole double-throw switch (SPDT)（S1）A ends and D ends electrical connection, the SP3T switch（S2）F ends and H ends
Electrical connection；The enabled and soft start logic controller（602）Export the first DCDC modules（801）With the 2nd DCDC
Module（802）Enabled and opening control signal；The SP3T switch（S2）H ends be used as the 2nd DCDC modules
（802）Soft start control signal lead-out terminal, export the 2nd DCDC modules（802）Soft start control signal；When
The SP3T switch（S2）F ends and H ends voltage and the single-pole double-throw switch (SPDT)（S1）D terminal voltages it is equal when, i.e.,
The 2nd DCDC modules（802）After the completion of soft start, the SP3T switch（S2）H ends and E ends electrical connection；So that institute
State the first DCDC modules（801）With the 2nd DCDC modules（802）The lead-out terminal of soft start control signal export surely
Fixed voltage signal.
9. the direct current energy transformation system that DCDC modules automatically switch according to claim 1, it is characterised in that：
The control module（900）Including microcontroller (Micro Controller Unit)；
The control module（900）Detection direct current energy transformation system is output to the load current of outside, the control module
（900）The load current size for judging to detect by microcontroller, calculate the DCDC modules for needing to open（800）Number
Amount, and export corresponding DCDC modules（800）Enabled and opening control signal.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108471241A (en) * | 2017-02-23 | 2018-08-31 | 纬创资通股份有限公司 | Transformer device and control method thereof |
| US20210376731A1 (en) * | 2020-05-29 | 2021-12-02 | Texas Instruments Incorporated | Daisy chain clock distribution system |
| CN115242059A (en) * | 2022-09-21 | 2022-10-25 | 深圳英集芯科技股份有限公司 | Multi-power-supply parallel current output device and method and electronic equipment |
| CN116048156A (en) * | 2023-01-10 | 2023-05-02 | 江苏三联生物工程股份有限公司 | Bidirectional temperature control system of electrochemiluminescence detection device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471241A (en) * | 2017-02-23 | 2018-08-31 | 纬创资通股份有限公司 | Transformer device and control method thereof |
| CN108471241B (en) * | 2017-02-23 | 2019-08-16 | 纬创资通股份有限公司 | Transformer device and control method thereof |
| US20210376731A1 (en) * | 2020-05-29 | 2021-12-02 | Texas Instruments Incorporated | Daisy chain clock distribution system |
| US11646666B2 (en) * | 2020-05-29 | 2023-05-09 | Texas Instruments Incorporated | Daisy chain clock distribution system |
| CN115242059A (en) * | 2022-09-21 | 2022-10-25 | 深圳英集芯科技股份有限公司 | Multi-power-supply parallel current output device and method and electronic equipment |
| CN116048156A (en) * | 2023-01-10 | 2023-05-02 | 江苏三联生物工程股份有限公司 | Bidirectional temperature control system of electrochemiluminescence detection device |
| CN116048156B (en) * | 2023-01-10 | 2024-01-30 | 江苏三联生物工程股份有限公司 | Bidirectional temperature control system of electrochemiluminescence detection device |
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