CN108736715A - Buck DC-DC converter - Google Patents
Buck DC-DC converter Download PDFInfo
- Publication number
- CN108736715A CN108736715A CN201810706781.4A CN201810706781A CN108736715A CN 108736715 A CN108736715 A CN 108736715A CN 201810706781 A CN201810706781 A CN 201810706781A CN 108736715 A CN108736715 A CN 108736715A
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- capacitance
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- 239000004065 semiconductor Substances 0.000 claims abstract description 23
- 230000005611 electricity Effects 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A kind of buck DC-DC converter, including resistance R1, capacitance C1, diode D2, diode D1, N-type metal-oxide-semiconductor M1, inductance L1, capacitance Co and 1 controller, conventional power supply control chip can be used in the controller, the effect of the resistance R1 is to ensure that the voltage vC1 of capacitance C1 is more than input voltage Vi, when N-type metal-oxide-semiconductor M1 ends, diode D1 conductings, DC power supply Vi provide electric energy, capacitance C1 energy storage to capacitance C1 and load Z simultaneously；When N-type metal-oxide-semiconductor M1 is connected, diode D1 cut-offs, DC power supply Vi and capacitance C1 provide electric energy for load Z jointly, and capacitance C1 releases energy.The present invention realizes that output and input electric current continuous and output and input voltage same polarity, has expanded the type of DC-DC converter.
Description
Technical field
The present invention relates to DC-DC (DC-DC) converter, especially one kind, to output and input electric current continuous and input
With the buck DC-DC converter of output voltage same polarity, the direct current that basic unit sets up multi input and multi output can be used as
Source system, such as：DC power supplier parallel system, LED array drive system, distributed photovoltaic power generation system etc..
Background technology
The existing basic DC-DC converter with buck functionality includes Buck converters, One Buck-Boost converter body, Cuk
Converter, Sepic converters and Zeta converters.As listed in table 1, in the case where not considering output capacitance, above-mentioned this 5 kinds tools
There is the basic DC-DC converter of buck functionality to be all unsatisfactory for " it is continuous and output and input voltage homopolarity outputting and inputting electric current
The requirement of property ".
Table 1.
Invention content
To overcome the existing basic DC-DC converter with buck functionality to be all unsatisfactory for " it is continuous outputting and inputting electric current
And output and input voltage same polarity " desired deficiency, the present invention provides a kind of buck DC-DC converter, it is therefore intended that real
It is continuous and output and input voltage same polarity now to output and input electric current, expands the type of DC-DC converter.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of buck DC-DC converter, including resistance R1, capacitance C1, diode D2, diode D1, N-type metal-oxide-semiconductor M1,
Inductance L1, capacitance Co and 1 controller, the controller have port vg, and one end of capacitance C1 is simultaneously with DC power supply Vi's
Anode is connected with the drain electrode of N-type metal-oxide-semiconductor M1, the other end of capacitance C1 simultaneously with one end of resistance R1 and the anode phase of diode D1
Even, the cathode of diode D1 is connected with one end of the source electrode of N-type metal-oxide-semiconductor M1 and inductance L1 simultaneously, and the other end of inductance L1 is simultaneously
Be connected with one end of capacitance Co and the one end for loading Z, the other end of capacitance Co simultaneously with load the other end of Z, diode D2
Anode is connected with the negative terminal of DC power supply Vi, and the cathode of diode D2 is connected with the other end of resistance R1, the door of N-type metal-oxide-semiconductor M1
Pole is connected with the port vg of controller.
Further, the controller is power supply control chip.Conventional power supply control chip can be used in the controller.By
Controller determines the working condition of N-type metal-oxide-semiconductor M1.
The effect of the resistance R1 is to ensure that the voltage vC1 of capacitance C1 is more than input voltage Vi.Ignore leading for diode D2
Logical pressure drop, works as vC1>When Vi, diode D2 conductings, the electric current for flowing through resistance R1 is more than 0.
The steady operation process of the buck DC-DC converter：When N-type metal-oxide-semiconductor M1 ends, diode D1 conductings,
DC power supply Vi provides electric energy, capacitance C1 energy storage to capacitance C1 and load Z simultaneously；When N-type metal-oxide-semiconductor M1 is connected, diode D1
Cut-off, DC power supply Vi and capacitance C1 provide electric energy for load Z jointly, and capacitance C1 releases energy.
The present invention technical concept be：Addition is made of C1, R1 and D2 on the basis of Buck converter circuit topologys
Branch, it is always that load Z provides electric energy to enable DC power supply Vi, that is, realizes continuous input current, and maintain output current company
The continuous and constant operating characteristic of output voltage polarity.Meanwhile carrying out energy storage within a work period using capacitance C1 and releasing energy,
Efficient decompression transformation can be achieved.
Beneficial effects of the present invention are mainly manifested in：The buck DC-DC converter circuit structure is simple, only includes 1
A controllable type device can be used conventional power supply control chip and form applicable controller；With high efficiency, output and input electricity
Stream is continuous, output is consistent with input voltage polarity, operating characteristics of the output voltage Vo less than or equal to input voltage Vi.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention.
Fig. 2 is the simulation work oscillogram of the present invention.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.
With reference to figure 1 and Fig. 2, a kind of buck DC-DC converter, including resistance R1, capacitance C1, diode D2, diode
D1, N-type metal-oxide-semiconductor M1, inductance L1, capacitance Co and 1 controller, the controller have port vg, and one end of capacitance C1 is simultaneously
Be connected with the drain electrode of the anode of DC power supply Vi and N-type metal-oxide-semiconductor M1, the other end of capacitance C1 simultaneously with one end of resistance R1 and two
The anode of pole pipe D1 is connected, and the cathode of diode D1 is connected with one end of the source electrode of N-type metal-oxide-semiconductor M1 and inductance L1 simultaneously, inductance
The other end of L1 is connected with one end of one end of capacitance Co and load Z simultaneously, and the other end of capacitance Co is another with load Z simultaneously
End, diode D2 anode be connected with the negative terminal of DC power supply Vi, the cathode of diode D2 is connected with the other end of resistance R1, N
The gate pole of type metal-oxide-semiconductor M1 is connected with the port vg of controller.
Further, the controller is power supply control chip.Conventional power supply control chip can be used in the controller,
Such as：The combination of UC3842 and IR2110.The working condition of N-type metal-oxide-semiconductor M1 is determined by controller.
The effect of the resistance R1 is to ensure that the voltage vC1 of capacitance C1 is more than input voltage Vi.Ignore the conduction voltage drop of D2,
Work as vC1>When Vi, D2 conductings, the electric current for flowing through resistance R1 is more than 0.
When the present embodiment is in continuous conduction mode, steady operation process includes following 2 stages.
Stage 1：The M1 cut-offs of N-type metal-oxide-semiconductor, diode D1 conductings, diode D2 conductings, DC power supply Vi, capacitance C1, two poles
Pipe D1, inductance L1, capacitance Co, load Z constitute a circuit, diode D2, resistance R1, diode D1, inductance L1, capacitance Co,
Load Z constitutes another circuit, capacitance C1 energy storage, and output current io (does not consider to flow through inductance L1's in the case of capacitance Co
Electric current) linear decline, the electric current for flowing through resistance R1 is only a part of io.
Stage 2：N-type metal-oxide-semiconductor M1 conducting, diode D1 cut-offs, diode D2 conductings, DC power supply Vi, N-type metal-oxide-semiconductor M1,
Inductance L1, capacitance Co, load Z constitute a circuit, capacitance C1, N-type metal-oxide-semiconductor M1, inductance L1, capacitance Co, load Z, diode
D2, resistance R1 constitute another circuit, and capacitance C1 releases energy, and output current io (does not consider to flow through inductance in the case of capacitance Co
The electric current of L1) linear rise, the electric current for flowing through resistance R1 is only a part of io.
Fig. 2 is the simulation work oscillogram of the present embodiment.As shown in Figure 2, the input current ii of the present embodiment is continuous, output
Electric current io is continuous, and the voltage vC1 of capacitance C1 is more than input voltage Vi, and output voltage Vo is less than input voltage Vi, Vo and Vi homopolarity
Property.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
The concrete form for being not construed as being only limitted to embodiment and being stated of range, protection scope of the present invention is also and in this field skill
Art personnel according to present inventive concept it is conceivable that equivalent technologies mean.
Claims (2)
1. a kind of buck DC-DC converter, it is characterised in that：The buck DC-DC converter includes resistance R1, capacitance
C1, diode D2, diode D1, N-type metal-oxide-semiconductor M1, inductance L1, capacitance Co and 1 controller, the controller have port
One end of vg, capacitance C1 are connected with the drain electrode of the anode of DC power supply Vi and N-type metal-oxide-semiconductor M1 simultaneously, and the other end of capacitance C1 is same
When be connected with the anode of one end of resistance R1 and diode D1, the cathode of the diode D1 source electrode and electricity with N-type metal-oxide-semiconductor M1 simultaneously
The one end for feeling L1 is connected, and the other end of inductance L1 is connected with one end of one end of capacitance Co and load Z simultaneously, and capacitance Co's is another
End is connected with the other end, the anode of diode D2 and the negative terminal of DC power supply Vi of load Z simultaneously, cathode and the electricity of diode D2
The other end for hindering R1 is connected, and the gate pole of N-type metal-oxide-semiconductor M1 is connected with the port vg of controller.
2. buck DC-DC converter as described in claim 1, it is characterised in that：The controller is power supply control chip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810706781.4A CN108736715A (en) | 2018-07-02 | 2018-07-02 | Buck DC-DC converter |
| CN201910386720.9A CN110112911A (en) | 2018-07-02 | 2019-05-10 | The buck DC-DC converter of the series-parallel switching working mode of capacitor containing resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810706781.4A CN108736715A (en) | 2018-07-02 | 2018-07-02 | Buck DC-DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108736715A true CN108736715A (en) | 2018-11-02 |
Family
ID=63925624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810706781.4A Withdrawn CN108736715A (en) | 2018-07-02 | 2018-07-02 | Buck DC-DC converter |
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| Country | Link |
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| CN (1) | CN108736715A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109391152A (en) * | 2018-11-12 | 2019-02-26 | 浙江工业大学 | Cascade buck-boost type DC-DC converter |
| CN109391151A (en) * | 2018-11-12 | 2019-02-26 | 浙江工业大学 | Cascade step-up dc-dc converter |
| CN109391141A (en) * | 2018-11-12 | 2019-02-26 | 浙江工业大学 | The continuous step-up dc-dc converter of input and output electric current |
| CN109391145A (en) * | 2018-11-12 | 2019-02-26 | 浙江工业大学 | Cascade buck DC-DC converter |
| CN109510463A (en) * | 2018-11-12 | 2019-03-22 | 浙江工业大学 | The continuous buck DC-DC converter of input and output electric current |
-
2018
- 2018-07-02 CN CN201810706781.4A patent/CN108736715A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109391152A (en) * | 2018-11-12 | 2019-02-26 | 浙江工业大学 | Cascade buck-boost type DC-DC converter |
| CN109391151A (en) * | 2018-11-12 | 2019-02-26 | 浙江工业大学 | Cascade step-up dc-dc converter |
| CN109391141A (en) * | 2018-11-12 | 2019-02-26 | 浙江工业大学 | The continuous step-up dc-dc converter of input and output electric current |
| CN109391145A (en) * | 2018-11-12 | 2019-02-26 | 浙江工业大学 | Cascade buck DC-DC converter |
| CN109510463A (en) * | 2018-11-12 | 2019-03-22 | 浙江工业大学 | The continuous buck DC-DC converter of input and output electric current |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181102 |
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| WW01 | Invention patent application withdrawn after publication |