CN107863882A - Buck converter BUCK circuits - Google Patents
Buck converter BUCK circuits Download PDFInfo
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- CN107863882A CN107863882A CN201711236356.5A CN201711236356A CN107863882A CN 107863882 A CN107863882 A CN 107863882A CN 201711236356 A CN201711236356 A CN 201711236356A CN 107863882 A CN107863882 A CN 107863882A
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- gate
- buck
- diode
- controlled switch
- inductor
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
- H02M3/1586—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
Abstract
The present invention provides a kind of buck converter BUCK circuits, belongs to field of switch power.BUCK circuits include：First BUCK units, including the first gate-controlled switch, the first diode and the first inductor, the first end of first inductor is connected by the positive pole of the first gate-controlled switch and power supply, second end of the first inductor is connected with output end, the negative pole of first diode is connected with the first end of the first inductor, and the positive pole of the first diode and the negative pole of power supply connect；2nd BUCK units, including the second gate-controlled switch, the second diode and the second inductor, the first end of second inductor is connected by the positive pole of the second gate-controlled switch and power supply, second end of the second inductor is connected with output end, the negative pole of second diode is connected with the first end of the second inductor, and the positive pole of the second diode and the negative pole of power supply connect；Feedback unit, for gathering the voltage signal of output end, corresponding feedback signal is fed back according to voltage signal；Processor, for generating the first pwm signal and the second pwm signal.
Description
Technical field
The present invention relates to field of switch power, more particularly to a kind of buck converter BUCK circuits.
Background technology
Switching Power Supply is essential in modern people's life, can be seen in new-energy automobile, space flight, military domain
The use of Switching Power Supply.With the further development of switch power technology, to the power density of power supply product, volume, performance, can
New requirement is proposed in terms of by property and cost, national and major tissue promulgates a series of regulations to constrain Switching Power Supply city in succession
Field, such as power supply product must pass through EMI tests and safety standard certification etc..
It is well known that BUCK topological structures can simply apply to Switching Power Supply on a large scale, especially in, the electricity of low-power
In the system of source, although single channel BUCK circuits have numerous advantages, because use range has limitation, it is impossible to applied to high-power
Circuit system in.With the increase of power, switch stress becomes big in single channel BUCK power supplys, output stability is deteriorated, EMI increases
Add, current ripples increase a series of problems, such as occur so that people have to the other more complicated structures of selection.
The content of the invention
The purpose of embodiment of the present invention is to provide a kind of buck converter BUCK circuits, and the BUCK circuits pass through two-way list
The parallel operation of level BUCK converters, makes the current stress of switching tube diminish, and carries out Interleaved control to double switch pipe so that defeated
Go out current switch ripple to significantly reduce, while can also expand the use range of BUCK circuits.
To achieve these goals, embodiment of the present invention provides a kind of BUCK circuits, and the BUCK circuits can include：
First BUCK units, including the first gate-controlled switch, the first diode and the first inductor, the first of the first inductor
End is connected by the positive pole of the first gate-controlled switch and power supply, and the second end of the first inductor is connected with output end, the first diode
Negative pole be connected with the first end of the first inductor, the negative pole of the positive pole of the first diode and power supply connects；
2nd BUCK units, including the second gate-controlled switch, the second diode and the second inductor, the first of the second inductor
End is connected by the positive pole of the second gate-controlled switch and power supply, and the second end of the second inductor is connected with output end, the second diode
Negative pole be connected with the first end of the second inductor, the negative pole of the positive pole of the second diode and power supply connects；
Feedback unit, it is connected with output end, is fed back accordingly for gathering the voltage signal of output end, and according to voltage signal
Feedback signal；
Processor, the feedback signal generation for being exported according to feedback unit are respectively used to adjust the first gate-controlled switch and the
The first PWM (Pulse Width Modulation, the pulse width modulation) signals of two gate-controlled switches and the second pwm signal.
Optionally, can be generated when accessing the power supply so that first gate-controlled switch and second gate-controlled switch
First initial p WM signals of alternate conduction and the second initial p WM signals.
Alternatively, the BUCK circuits may further include：Current sampler, for gathering the input current of power supply；Place
Reason device is additionally operable to：Judge whether the input current is more than the maximum allowable input current of BUCK circuits according to input current；Sentencing
In the case that disconnected input current is more than maximum allowable input current, the first gate-controlled switch and second gate-controlled switch are disconnected.
Alternatively, feedback unit can include comparator, and the normal phase input end of the comparator is connected with output end, comparator
Inverting input be used for receive default ramp signal, the output end of comparator is connected with processor, the output end of comparator
For exporting the 3rd pwm signal to processor.
Alternatively, processor can be further used for by the 3rd pwm signal and default first square-wave signal carry out with it is non-
Computing, to generate the first pwm signal；And the 3rd pwm signal and default second square-wave signal are subjected to NAND operation, with life
Into second pwm signal.
Alternatively, feedback unit can also include：First driving power, the 3rd diode and the 4th diode, the 3rd
The negative pole of diode is connected with the first driving power, and the positive pole of the 3rd diode and the output end of comparator connect, and the four or two
The negative pole of pole pipe is connected with the positive pole of the 3rd diode, the plus earth of the 4th diode.
Alternatively, current sampler can be transformer.
Alternatively, capacitor can be connected between the positive pole of output end and the negative pole of output end.
Alternatively, processor can be microprocessor.
Alternatively, the first gate-controlled switch and second gate-controlled switch can be FET.
Pass through above-mentioned technical proposal, the BUCK circuits make switching tube by the parallel operation of two-way single-stage BUCK converters
Current stress diminish, to double switch pipe carry out Interleaved control so that output current switch ripple significantly reduces, while also can
Enough expand the use range of BUCK circuits.
The further feature and advantage of embodiment of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is that embodiment of the present invention is further understood for providing, and a part for constitution instruction, with
Following embodiment is used to explain embodiment of the present invention together, but does not form the limit to embodiment of the present invention
System.In the accompanying drawings：
Fig. 1 is the structural representation of BUCK circuits according to an embodiment of the present invention；
Fig. 2 is the structural representation of BUCK circuits according to an embodiment of the present invention；
Fig. 3 is the structural representation of feedback unit according to an embodiment of the present invention；And
Fig. 4 is each pwm signal according to an embodiment of the present invention and by the first inductor and the second inductor
The corresponding timing diagram of electric current.
Description of reference numerals
1st, feedback unit 2, processor
3rd, current sampler 4, comparator
L1, the first inductor L2, the second inductor
D1, the first diode D2, the second diode
D3, the 3rd diode D4, the 4th diode
K1, the first gate-controlled switch K2, the second gate-controlled switch
S1, the first driving power C1, capacitor
Embodiment
The embodiment of embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that
Embodiment described herein is merely to illustrate and explain the present invention embodiment, is not intended to limit the invention implementation
Mode.
Fig. 1 is the structural representation of BUCK circuits according to an embodiment of the present invention, in the figure, the BUCK circuits
It can include：
First BUCK units, the first BUCK units can include the first gate-controlled switch K1, the first diode D1 and first
Inductor L1, first inductor L1 first end are connected by the positive pole of the first gate-controlled switch K1 and power supply, the first inductor
L1 the second end is connected with output end, and the first diode D1 negative pole is connected with the first inductor L1 first end, the one or two pole
Pipe D1 positive pole and the negative pole of power supply connect.
2nd BUCK units, including the second gate-controlled switch K2, the second diode D2 and the second inductor L2, second inductance
Device L2 first end is connected by the positive pole of the second gate-controlled switch K2 and power supply, and the second inductor L2 the second end and output end connect
Connect, the second diode D2 negative pole is connected with the second inductor L2 first end, the second diode D2 positive pole and bearing for power supply
Pole connects.
Feedback unit 1, is connected with output end, is fed back for gathering the voltage signal of output end, and according to the voltage signal
Corresponding feedback signal；
Processor 2, the feedback signal generation for being exported according to feedback unit 1 are respectively used to adjust the first gate-controlled switch K1
With the second gate-controlled switch K2 the first pwm signal and the second pwm signal.
In this embodiment, the negative pole of the power supply can be grounded.
The processor 2 can be general processor, application specific processor, conventional processors, digital signal processor (DSP),
Multi-microprocessor, the one or more microprocessors associated with DSP core, controller, microcontroller, application specific integrated circuit
(ASIC), field programmable gate array (FPGA) circuit, the integrated circuit (IC) of any other type, state machine etc..In addition, should
Processor 2 can also select the power supply chip such as model L6559, TL494, SG3525.
In this embodiment, the processor 2 can be further used for generating first when the BUCK circuits access power supply
Initial p WM signals and the second initial p WM signals.The first initial p WM signals can be used for controlling leading for the first gate-controlled switch K1
On and off is opened, and the second initial p WM signals can be used for the conducting and disconnection for controlling the second gate-controlled switch K2.Preferably
In, the phase difference half period (i.e. 180 °) of the first initial p WM signals and the second initial p WM signals, then, in the BUCK
When circuit works, the first gate-controlled switch K1 and the second gate-controlled switch K2 will alternate conductions so that the first gate-controlled switch K1 and
Second gate-controlled switch K2 current stress reduces, and improve the first gate-controlled switch K1 and the second gate-controlled switch K2 uses the longevity
Life.Meanwhile reduce the current switch ripple of the electric current of output end output.
In an embodiment of the invention, the BUCK circuits can also include current sampler 3.As shown in Fig. 2 should
Current sampler 3 is connected between the first gate-controlled switch K1 and the positive pole of power supply, for gathering the input current size of power supply.
In the embodiment, the processor 2 can be further used for：Judge whether the input current is big according to the size of the input current
In the maximum allowable input current of the BUCK circuits；In the case where judging that the input current is more than maximum allowable input current,
Disconnect the first gate-controlled switch K1 and the second gate-controlled switch K2 so that the BUCK circuits enter protection protected mode, avoid damage electricity
Road device.In this embodiment, the current sampler 3 can be transformer, and a coil of the transformer is connected to power supply
Positive pole and the first gate-controlled switch K1 between, another coil of the mutual inductor can be connected with processor 2.
In an embodiment of the invention, feedback unit 1 can include comparator 4.As shown in figure 3, the comparator 4
Normal phase input end can be connected with the output end of BUCK circuits, the inverting input of the comparator 4 be used to receiving it is default tiltedly
Ripple signal.In this embodiment, the ramp signal can be sent by ramp signal generator or directly passed through
Processor 2 produces, and is inputted by the inverting input.The comparator 4 is by by the voltage signal of the output end of BUCK circuits
Compared with ramp signal, the 3rd pwm signal is generated, and the 3rd pwm signal is sent to place by the output end of the comparator 4
Manage device 2.
In an embodiment of the invention, the processor 2 believes the 3rd PWM after the 3rd pwm signal is received
Number carry out NAND operation with the first square-wave signal of the 3rd pwm signal same frequency with default, the first pwm signal of generation is to repair
Just it is originally used for controlling the first gate-controlled switch K1 the first initial p WM signals.The processor 2 is additionally operable to receiving the 3rd PWM
After signal, the 3rd pwm signal is carried out and non-fortune with default with the second square-wave signal of the 3rd pwm signal same frequency
Calculate, the second pwm signal of generation is originally used for the second gate-controlled switch K1 of control the second initial p WM signals to correct.In the implementation
In mode, the phase of first square-wave signal and the second square-wave signal can be opposite (180 ° of phase difference).The present invention's
In one example, processor 2 can be by the way that the signal amplitude for adjusting the ramp signal to be adjusted to the duty of the 3rd pwm signal
Than to adjust the dutycycle of the first pwm signal and the second pwm signal, so as to control the power output of the BUCK circuits.In the reality
Apply in mode, capacitor C1 can be connected between the positive pole and negative pole of the output end of the BUCK circuits, capacitor C1 is used for
Filter out the AC signal of positive and negative interpolar.
In an embodiment of the invention, as shown in figure 3, feedback unit can also include：First driving power S1,
3rd diode D3 and the 4th diode D4, the 3rd diode D3 negative pole are connected with the first driving power S1, the three or two pole
Pipe D3 positive pole is connected with the output end of comparator 4, and the 4th diode D4 negative pole is connected with the 3rd diode D3 positive pole,
4th diode D4 plus earth.
Although showing the specific component and circuit structure of feedback unit 1 in Fig. 3, those skilled in the art can be with
Understand, Fig. 3 is illustrated that the example of feedback unit 1, therefore feedback unit 1 is not limited to the specific example shown in Fig. 3.
When the BUCK circuits access power supply, direct current enters circuit by current sampler 3 (transformer).Processor 2
It is connected with the current sampler 3, for judging whether the electric current is more than the BUCK circuits most according to the size of current of the power supply
It is big to allow input current.
In the case where the electric current is less than maximum allowable input current, processor 2 is generated for controlling the first gate-controlled switch
K1 the first initial p WM signals and the second initial p WM signals for controlling the second gate-controlled switch K2.First initial p WM believes
Number and the second initial p WM signals phase difference half period, the first gate-controlled switch K1 and the second gate-controlled switch K2 alternate conductions.
In this embodiment, the mode of the alternate conduction can be：
When the first initial p WM signals are high level, the second initial p WM signals are low level.Now, the first gate-controlled switch
K1 is turned on, and power supply is powered by the first inductor L1 to output end.
When the first initial p WM signal outputs are low level, due to the presence of the dutycycle of pwm signal, now, at the beginning of second
The output of beginning pwm signal is temporarily low level.Now, the first gate-controlled switch K1 and the second gate-controlled switch K2 disconnects, now, first
Inductor L1 starts afterflow.
When the second initial p WM signals are high level, the first initial p WM signals are low level.Now, the first gate-controlled switch
K1 disconnects, the second gate-controlled switch K2 conductings.Power supply is powered by the second inductor L2 to output end.
When the second initial p WM signals are low level, due to the presence of the dutycycle of pwm signal, the first initial p WM signals
It is temporarily low level.Now, the second gate-controlled switch K2 and the first gate-controlled switch K1 armies disconnect, and the second inductor L2 starts afterflow.
Fig. 4 shows the first initial p WM signals (PWM1), the second initial p WM signals (PWM2), by the first inductor
Sequential relationship between L1 and the electric current for passing through the second inductor L2.
The signal of output end (in this embodiment, should by feedback unit 1 by comparator 4 and default ramp signal
Ramp signal can be staff according to the rated power of electrical appliance in processor 2 it is default) be compared, according to comparison
As a result the 3rd pwm signal is generated.Processor 2 is believed by the 3rd pwm signal and with the first square wave of the 3rd pwm signal same frequency
Number NAND operation is carried out, the first pwm signal of generation is to correct first initial p WM signal (in this embodiment, correcting modes
Can directly replace)；Processor 2 differs half week by the 3rd pwm signal and with the first square-wave signal same frequency and phase
The second square-wave signal of phase carries out NAND operation, generates the second pwm signal to correct the second initial p WM signals.
Pass through above-mentioned technical proposal, the technique effect of the BUCK circuits are as follows：
1st, output current is distinguished by two BUCK units so that the working frequency of the circuit improves compared with the prior art
One times, also accordingly reduce half in the current switch ripple of the electric current of output end.
2nd, it is cross-linked, can not only be applied to during application of the prior art by two BUCK units
The application field of BUCK circuits, additionally it is possible to be applied to by improving the power grade of circuit in other high power circuits.
The optional embodiment of example of the present invention is described in detail above in association with accompanying drawing, still, embodiment of the present invention is not
The detail being limited in above-mentioned embodiment, can be to of the invention real in the range of the technology design of embodiment of the present invention
The technical scheme for applying mode carries out a variety of simple variants, and these simple variants belong to the protection domain of embodiment of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, embodiment of the present invention
Various combinations of possible ways are no longer separately illustrated.
It will be appreciated by those skilled in the art that realize that all or part of step in above-mentioned embodiment method is to lead to
Program is crossed to instruct the hardware of correlation to complete, the program storage is in the storage medium, including some instructions are causing
One (can be single-chip microcomputer, chip etc.) or processor (processor) perform each embodiment methods described of the application
All or part of step.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
In addition, can also be combined between a variety of embodiments of embodiment of the present invention, as long as its
Without prejudice to the thought of embodiment of the present invention, it should equally be considered as embodiment of the present invention disclosure of that.
Claims (10)
1. a kind of buck converter BUCK circuits, it is characterised in that the buck converter BUCK circuits include：
First BUCK units, including the first gate-controlled switch, the first diode and the first inductor, the first of first inductor
End is connected by the positive pole of first gate-controlled switch and power supply, and the second end of first inductor is connected with output end, institute
The negative pole for stating the first diode is connected with the first end of first inductor, positive pole and the power supply of first diode
Negative pole connection；
2nd BUCK units, including the second gate-controlled switch, the second diode and the second inductor, the first of second inductor
End is connected by second gate-controlled switch with the positive pole of the power supply, the second end and the output end of second inductor
Connection, the negative pole of second diode is connected with the first end of second inductor, the positive pole of second diode and
The negative pole connection of the power supply；
Feedback unit, it is connected with the output end, for gathering the voltage signal of the output end, and according to the voltage signal
Feed back corresponding feedback signal；
Processor, the feedback signal generation for being exported according to the feedback unit are respectively used to adjust first gate-controlled switch
With the first pulse width modulation (PWM) signal of second gate-controlled switch and the second pwm signal.
2. BUCK circuits according to claim 1, it is characterised in that generation causes described first when accessing the power supply
The the first initial p WM signals and the second initial p WM signals of gate-controlled switch and the second gate-controlled switch alternate conduction.
3. BUCK circuits according to claim 1, it is characterised in that further comprise：Current sampler, for gathering
State the input current of power supply；
The processor is additionally operable to：
Judge whether the input current is more than the maximum allowable input current of the BUCK circuits according to the input current；
In the case where judging that the input current is more than the maximum allowable input current, disconnect first gate-controlled switch and
Second gate-controlled switch.
4. buck converter BUCK circuits according to claim 1, it is characterised in that the feedback unit includes comparing
Device, the normal phase input end of the comparator are connected with the output end, and the inverting input of the comparator is default for receiving
Ramp signal, the output end of the comparator is connected with the processor, and the output end of the comparator is used for the place
Manage device and export the 3rd pwm signal.
5. buck converter BUCK circuits according to claim 4, it is characterised in that the processor be further used for by
3rd pwm signal carries out NAND operation with default first square-wave signal, to generate first pwm signal；And will
3rd pwm signal carries out NAND operation with default second square-wave signal, to generate second pwm signal.
6. buck converter BUCK circuits according to claim 4, it is characterised in that the feedback unit also includes：The
One driving power, the 3rd diode and the 4th diode, the negative pole of the 3rd diode are connected with first driving power,
The positive pole of 3rd diode is connected with the output end of the comparator, the negative pole and the described 3rd 2 of the 4th diode
The positive pole connection of pole pipe, the plus earth of the 4th diode.
7. buck converter BUCK circuits according to claim 3, it is characterised in that the current sampler is mutual inductance
Device.
8. buck according to claim 1 becomes BUCK circuits, it is characterised in that the positive pole of the output end and described defeated
Go out between the negative pole at end and be connected with capacitor.
9. buck converter BUCK circuits according to claim 1, it is characterised in that the processor is microprocessor.
10. buck converter BUCK circuits according to claim 1, it is characterised in that first gate-controlled switch and institute
It is FET to state the second gate-controlled switch.
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|---|---|---|---|
| CN201711236356.5A CN107863882A (en) | 2017-11-30 | 2017-11-30 | Buck converter BUCK circuits |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711236356.5A CN107863882A (en) | 2017-11-30 | 2017-11-30 | Buck converter BUCK circuits |
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| CN107863882A true CN107863882A (en) | 2018-03-30 |
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| CN109462335A (en) * | 2018-12-20 | 2019-03-12 | 江苏万帮德和新能源科技股份有限公司 | Crisscross parallel Buck power control circuit and its control method |
| CN111130327A (en) * | 2019-12-31 | 2020-05-08 | 洛阳隆盛科技有限责任公司 | Low-ripple direct-current voltage reduction circuit and voltage reduction method |
| CN112260536A (en) * | 2020-09-18 | 2021-01-22 | 中国电子科技集团公司第十八研究所 | High-specific-power Buck circuit applied to satellite power supply |
| US11190101B2 (en) | 2018-10-30 | 2021-11-30 | Lear Corporation | System and method for balancing current of converter phases |
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| US11190101B2 (en) | 2018-10-30 | 2021-11-30 | Lear Corporation | System and method for balancing current of converter phases |
| CN109462335A (en) * | 2018-12-20 | 2019-03-12 | 江苏万帮德和新能源科技股份有限公司 | Crisscross parallel Buck power control circuit and its control method |
| CN111130327A (en) * | 2019-12-31 | 2020-05-08 | 洛阳隆盛科技有限责任公司 | Low-ripple direct-current voltage reduction circuit and voltage reduction method |
| CN112260536A (en) * | 2020-09-18 | 2021-01-22 | 中国电子科技集团公司第十八研究所 | High-specific-power Buck circuit applied to satellite power supply |
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