CN105915053A - Voltage stabilizing circuit wide in power supply input - Google Patents
Voltage stabilizing circuit wide in power supply input Download PDFInfo
- Publication number
- CN105915053A CN105915053A CN201610417305.1A CN201610417305A CN105915053A CN 105915053 A CN105915053 A CN 105915053A CN 201610417305 A CN201610417305 A CN 201610417305A CN 105915053 A CN105915053 A CN 105915053A
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- Prior art keywords
- circuit
- voltage
- input
- voltage stabilizing
- balanced circuit
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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
- H02M3/1563—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 without using an external clock
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a voltage stabilizing circuit wide in power supply input. The voltage stabilizing circuit comprises a first voltage stabilizing circuit, wherein the first voltage stabilizing circuit is coupled with an external power supply, and a first preset value is set; and a second voltage stabilizing circuit, wherein the second voltage stabilizing circuit is coupled with the external power supply and comprises a first unidirectional conduction element, and the cathode of the first unidirectional conduction element is coupled with the output end of the first voltage stabilizing circuit. When an input voltage is higher than the first preset value, the input voltage is output through the first voltage stabilizing circuit in a stabilized manner, the first unidirectional conduction element is in a reverse blocking state, and the second voltage stabilizing circuit stops working; and when the input voltage is lower than the first preset value, the first unidirectional conduction element is switched on, the input voltage is output by the second voltage stabilizing circuit, and the first voltage stabilizing circuit stops working. The invention provides the voltage stabilizing circuit wide in power supply input, voltage reduction and stabilization are well realized in different voltage ranges, the working state is stabilized, and the range of the input voltage is expanded to 12 V- 400 V.
Description
Technical field
The present invention relates to mu balanced circuit technical field, the mu balanced circuit inputted particularly to a kind of wide power.
Background technology
In most control circuit, always custom has used some decompression voltage regulators, as controller inside electricity
Source uses, such as, need to use 12V voltage step-down to 5V voltage, then conventional occupation mode is generally
LDO (low dropout regulator, low pressure difference linear voltage regulator) circuit blood pressure lowering or employing DC-DC blood pressure lowering；
And have employed LDO reduction voltage circuit, if in the case of input voltage and output voltage pressure drop ratio are relatively big, can lead
Causing LDO chip power excessive, caloric value is too high, is easily caused chip and burns or occur that the situation of instability occurs.
The when of so using LDO blood pressure lowering, it will usually fin is installed on chip LDO chip is dispelled the heat, to protect
Card chip steady operation.
And have employed DC-DC reduction voltage circuit, although reduce heating and the power problems of LDO, but on market
DC-DC chip typically power and could can only power at below 40V, too high voltages input, easily burn chip,
Subsequent conditioning circuit can be burnt simultaneously, cause controller to lose function.
Switching Power Supply design is usually and uses AC to power, and after AC rectifying and wave-filtering, carries out single-ended flyback circuit and sets
Meter, but which then needs to use single-end flyback converters to change main devices as voltage, but such change
Depressor volume typically can be bigger, requires very much the layout of power supply, the most such circuit mode, it is necessary to include height
Low pressure isolation circuit.Circuit although it is so can be used in the range of high pressure 100-400V and carry out voltage stabilizing, but
It is directed to design in the voltage voltage stabilizing of below 100V just have no idea.
Summary of the invention
The present invention provides the mu balanced circuit that a kind of wide power inputs, and well compensate for, in different voltage ranges, accomplishing
Lowering and stabilizing blood pressure, steady-working state, in the range of can extending to 12V-400V by input voltage range.
For solving the problems referred to above, the embodiment of the present invention provides the mu balanced circuit of a kind of wide power input, including:
First mu balanced circuit, couples external power source, sets the first preset value；
Second mu balanced circuit, couples external power source, including the first one-way conduction element, described first one-way conduction element
Negative pole couples described first mu balanced circuit output；
DC-DC change-over circuit, couples outfan and the output of described second mu balanced circuit of described first mu balanced circuit
End, exports the voltage step-down after the first mu balanced circuit and described second mu balanced circuit voltage stabilizing；
When input voltage is higher than the first preset value, input voltage exports through the first mu balanced circuit voltage stabilizing, and described first is single
Reversely ending to breakover element, the second mu balanced circuit quits work；When input voltage is less than the first preset value, described
First one-way conduction element conductive, input voltage exports through the second voltage of voltage regulation circuit, and the first mu balanced circuit quits work.
As a kind of embodiment, described first mu balanced circuit includes the first field effect transistor and PWM controller, described
First field effect transistor drain electrode couples voltage input, and grid couples described PWM controller, and source electrode couples DC-DC and turns
Changing circuit, described PWM controller one end couples described first field effect transistor output.
As a kind of embodiment, described first mu balanced circuit also includes energy-storage travelling wave tube and the first sample circuit, described storage
Can couple described first field effect transistor source electrode in element one end, the other end couples DC-DC change-over circuit, and described first adopts
Sample circuit on one side couples energy-storage travelling wave tube output, and the other end couples PWM controller.
As a kind of embodiment, described second mu balanced circuit includes the second field effect transistor and voltage stabilizing element, described second
Field effect transistor drain electrode couples voltage and inputs and couple grid by resistance, and grid passes through described voltage stabilizing element ground connection, source electrode
Couple described first one-way conduction element positive pole.
As a kind of embodiment, the outfan of described energy-storage travelling wave tube is also associated with the first filter circuit.
As a kind of embodiment, the source electrode of described second field effect transistor is also associated with the second filter circuit.
As a kind of embodiment, described first sample circuit includes the first resistance and second resistance of series connection, described the
The connection node of one resistance and the second resistance couples described PWM controller.
As a kind of embodiment, described first mu balanced circuit also includes the second one-way conduction element, described second unidirectional
Breakover element positive pole couples the output of described energy-storage travelling wave tube, and negative pole couples described DC-DC change-over circuit.
As a kind of embodiment, described DC-DC change-over circuit includes DC-DC chip and the second sample circuit,
Described DC-DC chip couples described first mu balanced circuit and described second mu balanced circuit, described second sample circuit one
End couples the output of described DC-DC change-over circuit, and the other end couples described DC-DC chip.
The present invention having the beneficial effects that compared to prior art: by have changed traditional PWM controller circuit,
Being selected first to be carried out voltage stabilizing by that circuit by PWM controller and the second field effect transistor Q2,60V-400V voltage is defeated
Fashionable, there is PWM controller circuit first to carry out voltage stabilizing, when inputting less than 60V voltage, by the second field effect transistor Q2
Carrying out voltage stabilizing, the voltage after voltage stabilizing is given DC-DC change-over circuit and is carried out small voltage lowering and stabilizing blood pressure, obtains all devices
The voltage of demand selects.
Accompanying drawing explanation
Fig. 1 is the frame construction drawing of the mu balanced circuit of the wide power input of the present invention.
Accompanying drawing marks: 1, the first mu balanced circuit；11, the first sample circuit；2, the second mu balanced circuit；3、DC-DC
Change-over circuit；31, the second sample circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing, to the present invention, above-mentioned and other technical characteristic and advantage are clearly and completely described,
Obviously, described embodiment is only the section Example of the present invention rather than whole embodiment.
As it is shown in figure 1, the mu balanced circuit of a kind of wide power input, including first mu balanced circuit the 1, second mu balanced circuit
2 and DC-DC change-over circuits 3, the outfan of the first mu balanced circuit 1 and the second mu balanced circuit 2 all couples DC-DC
Which mu balanced circuit pair the input of change-over circuit 3, selected first by by the size of the first preset value and input voltage
It carries out voltage stabilizing and inputs to DC-DC change-over circuit 3.
First mu balanced circuit 1 include the first field effect transistor Q1, PWM controller, energy-storage travelling wave tube, the first filter circuit,
Second one-way conduction element and the first sample circuit 11.First field effect transistor Q1 drain electrode couples external power source VD, grid
Pole couples PWM controller, and source electrode couples energy-storage travelling wave tube.First sample circuit 11 one end couples the defeated of energy-storage travelling wave tube
Going out end, the first sample circuit 11 includes the first resistance R1 and the second resistance R2, the first resistance R1 and the of series connection
The connection node of two resistance R2 couples PWM controller.The positive pole of the second one-way conduction element couples energy-storage travelling wave tube
Outfan, negative pole couples the input of DC-DC change-over circuit 3.In the present embodiment, the first filter circuit includes
Filter capacitor C1.In the present embodiment, above-mentioned energy-storage travelling wave tube uses inductance L1, the second one-way conduction element to use
Diode D2.First preset value size by which kind of PWM controller chip of sampling is determined, PWM controller chip
Threshold value be the first preset value.
Second mu balanced circuit 2 includes the second field effect transistor Q2, voltage stabilizing element, the second filter circuit, first unidirectional
Logical element, the second field effect transistor Q2 drain electrode couples external power source VD and couples its grid, grid by resistance R3
By voltage stabilizing element ground connection, source electrode couples the first one-way conduction element positive pole, and the first one-way conduction element negative pole couples
DC-DC change-over circuit 3 inputs.Being also associated with filter circuit, in the present embodiment, the second filter circuit includes filter
Ripple electric capacity C3, filter capacitor C3 couple the source electrode of the second field effect transistor.Above-mentioned voltage stabilizing element uses Zener diode
D3, the first one-way conduction element uses diode D1.The output voltage size of the second mu balanced circuit 2 depends on using
Great Zener diode.
DC-DC change-over circuit 3 includes DC-DC chip, energy-storage travelling wave tube, the second sample circuit 31, DC-DC core
Sheet couples the first mu balanced circuit 1 and output of the second mu balanced circuit 2, and the output of DC-DC chip couples energy-storage travelling wave tube,
Energy-storage travelling wave tube outfan is coupled with the second sample circuit 31, and the second sample circuit 31 includes the 4th resistance R4 and the 5th
Resistance R5, the connection node of the 4th resistance R4 and the 5th resistance R5 couples DC-DC chip.Energy-storage travelling wave tube exports
End is additionally provided with filter circuit, and it includes filter capacitor C4.Above-mentioned energy-storage travelling wave tube uses inductance L2.
In sum, as shown in A point in Fig. 1, the size of its voltage depend on PWM controller chip type and
The size of Zener diode.
In the present invention, with the threshold value of PWM controller chip as 60V, the threshold value of Zener diode D3 is 20V
As a example by carry out following elaboration.
VD voltage is input to the drain electrode (D pole) of the first field effect transistor Q1 and the second field effect transistor Q2, when VD electricity
When pressure is higher than 60V, PWM controller can normally work, and the first field effect transistor Q1 is in PWM controller control
State so that the first field effect transistor Q1 is on off state, inductance L1 plays energy storage effect.When the first field effect
During pipe Q1 conducting, inductance L1 starts energy storage, output voltage simultaneously, when the first field effect transistor Q1 cut-off, and inductance
L1 starts to release energy, and provides electric energy for subsequent conditioning circuit.The electric energy that inductance L1 exports is filtered by filter capacitor C1
Ripple.Resistance R1 and R2 carries out B point voltage collection simultaneously, controls the PWM waveform of PWM controller output,
Make to export B point voltage and reach stable, circuit sets B point voltage as 20V, or according to regulating R1 and R2
It is adjusted, the highest can not operate 36V.Now B point voltage is transferred to A point, then A by diode D1
Point voltage is 19.3V.A point voltage is transported to follow-up DC-DC circuit to start normally to work, by regulation resistance
R4 and resistance R5 stablizes VCC magnitude of voltage；
When VD voltage is higher than 60V, by resistance R3 and Zener diode D3, by the grid of the second field effect transistor Q2
Pole (G pole) voltage stabilization is at 20V, and the most now the second field effect transistor Q2 turns on, but leading due to field effect transistor
Logical characteristic, source electrode (S pole) voltage of the second field effect transistor Q2 is grid (G pole) voltage, but can be less than grid
Pole tension about 2V, so the source voltage of the second field effect transistor Q2 is 18V.Owing to now A point voltage is
19.3V, so diode D3 is in cut-off state, the second field effect transistor Q2 does not consume electric current, to protect second
Field effect transistor Q2.
When VD voltage is less than 60V, PWM controller, owing to cannot work under the lowest voltage, is therefore led
Having caused the first field effect transistor Q1 cut-off not work, most 0V, diode D1 are ended by B point voltage.Now due to
Field effect the second field effect transistor Q2 is constantly in conducting state, and the grid voltage of the second field effect transistor Q2 remains
20V, so the source voltage of field effect the second field effect transistor Q2 remains 18V, 18V voltage by diode D3
Be transferred to A point, then A point voltage is down to 17.3V from 19.3V, due to the fluctuation of this voltage, after not interfering with
Continuous DC-DC change-over circuit 3 works, so VCC magnitude of voltage still will not change, still can be stable defeated
Go out magnitude of voltage.
When VD voltage is less than 20V, Zener diode D3 is unable to reach voltage stabilizing condition, the second field effect transistor Q2
Grid voltage will decline, but due to the on state characteristic of field effect transistor, the source voltage of the second field effect transistor Q2
Also will decline, as long as VCC voltage is low more than A point voltage, then DC-DC change-over circuit 3 can be by A point electricity
Pressure is converted to VCC voltage, ensures VCC voltage stabilization simultaneously.
By have changed traditional PWM controller circuit, PWM controller and the second field effect transistor Q2 select
Select and first which circuit to carry out voltage stabilizing by, during the input of 60V-400V voltage, have PWM controller circuit first to carry out voltage stabilizing,
When inputting less than 60V voltage, the second field effect transistor Q2 carrying out voltage stabilizing, the voltage after voltage stabilizing is given DC-DC and is turned
Changing circuit 3 and carry out small voltage lowering and stabilizing blood pressure, the voltage obtaining all devices demand selects.
Particular embodiments described above, has been carried out further the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, it will be appreciated that the foregoing is only the specific embodiment of the present invention, be not intended to limit the present invention
Protection domain.Particularly point out, to those skilled in the art, all within the spirit and principles in the present invention,
Any modification, equivalent substitution and improvement etc. done, should be included within the scope of the present invention.
Claims (9)
1. the mu balanced circuit of a wide power input, it is characterised in that including:
First mu balanced circuit, couples external power source, sets the first preset value；
Second mu balanced circuit, couples external power source, including the first one-way conduction element, described first one-way conduction element
Negative pole couples described first mu balanced circuit output；
DC-DC change-over circuit, couples outfan and the output of described second mu balanced circuit of described first mu balanced circuit
End, exports the voltage step-down after the first mu balanced circuit and described second mu balanced circuit voltage stabilizing；
When input voltage is higher than the first preset value, input voltage exports through the first mu balanced circuit voltage stabilizing, and described first is single
Reversely ending to breakover element, the second mu balanced circuit quits work；When input voltage is less than the first preset value, described
First one-way conduction element conductive, input voltage exports through the second voltage of voltage regulation circuit, and the first mu balanced circuit quits work.
The mu balanced circuit of wide power the most according to claim 1 input, it is characterised in that described first voltage stabilizing
Circuit includes that the first field effect transistor and PWM controller, described first field effect transistor drain electrode couple voltage input, grid
Coupling described PWM controller, source electrode couples DC-DC change-over circuit, and described PWM controller one end couples institute
State the first field effect transistor output.
The mu balanced circuit of wide power the most according to claim 2 input, it is characterised in that described first voltage stabilizing
Circuit also includes that energy-storage travelling wave tube and the first sample circuit, described energy-storage travelling wave tube one end couple described first field effect transistor source
Pole, the other end couples DC-DC change-over circuit, and described first sample circuit one end couples energy-storage travelling wave tube output, another
End couples PWM controller.
The mu balanced circuit of wide power the most according to claim 1 input, it is characterised in that described second voltage stabilizing
Circuit includes that the second field effect transistor and voltage stabilizing element, described second field effect transistor drain electrode couple voltage and input and pass through resistance
Coupling grid, grid passes through described voltage stabilizing element ground connection, and source electrode couples described first one-way conduction element positive pole.
The mu balanced circuit of wide power the most according to claim 3 input, it is characterised in that described energy-storage travelling wave tube
Outfan be also associated with the first filter circuit.
The mu balanced circuit of wide power the most according to claim 4 input, it is characterised in that described second effect
The source electrode of pipe should be also associated with the second filter circuit.
The mu balanced circuit of wide power the most according to claim 3 input, it is characterised in that described first sampling
Circuit includes the first resistance and second resistance of series connection, and the connection node of described first resistance and the second resistance couples described
PWM controller.
The mu balanced circuit of wide power the most according to claim 3 input, it is characterised in that described first voltage stabilizing
Circuit also includes that the second one-way conduction element, described second one-way conduction element positive pole couple the output of described energy-storage travelling wave tube,
Negative pole couples described DC-DC change-over circuit.
The mu balanced circuit of wide power the most according to claim 1 input, it is characterised in that described DC-DC
Change-over circuit includes that DC-DC chip and the second sample circuit, described DC-DC chip couple described first voltage stabilizing electricity
Road and described second mu balanced circuit, described second sample circuit one end couples the output of described DC-DC change-over circuit, separately
One end couples described DC-DC chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610417305.1A CN105915053B (en) | 2016-06-12 | 2016-06-12 | A kind of voltage regulator circuit of wide power input |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610417305.1A CN105915053B (en) | 2016-06-12 | 2016-06-12 | A kind of voltage regulator circuit of wide power input |
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| Publication Number | Publication Date |
|---|---|
| CN105915053A true CN105915053A (en) | 2016-08-31 |
| CN105915053B CN105915053B (en) | 2019-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610417305.1A Active CN105915053B (en) | 2016-06-12 | 2016-06-12 | A kind of voltage regulator circuit of wide power input |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101252313A (en) * | 2007-12-17 | 2008-08-27 | 福建师范大学 | Self-adapting power supply voltage converter |
| CN101562403A (en) * | 2008-04-17 | 2009-10-21 | 深圳市思达仪表有限公司 | Single-phase electronic type electric energy meter electric source |
| JP2013038882A (en) * | 2011-08-05 | 2013-02-21 | Panasonic Corp | Control method for two-converter type power supply unit and power supply unit |
| CN205693560U (en) * | 2016-06-12 | 2016-11-16 | 浙江方大智控科技有限公司 | A kind of mu balanced circuit of wide power input |
-
2016
- 2016-06-12 CN CN201610417305.1A patent/CN105915053B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101252313A (en) * | 2007-12-17 | 2008-08-27 | 福建师范大学 | Self-adapting power supply voltage converter |
| CN101562403A (en) * | 2008-04-17 | 2009-10-21 | 深圳市思达仪表有限公司 | Single-phase electronic type electric energy meter electric source |
| JP2013038882A (en) * | 2011-08-05 | 2013-02-21 | Panasonic Corp | Control method for two-converter type power supply unit and power supply unit |
| CN205693560U (en) * | 2016-06-12 | 2016-11-16 | 浙江方大智控科技有限公司 | A kind of mu balanced circuit of wide power input |
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| Publication number | Publication date |
|---|---|
| CN105915053B (en) | 2019-02-26 |
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Effective date of registration: 20221213 Address after: 310000 room 901, digital entertainment building, No. 98, Wenyi West Road, Xihu District, Hangzhou City, Zhejiang Province Patentee after: ZHEJIANG FONDA CONTROL TECHNOLOGY Co.,Ltd. Patentee after: Guangdong Fanglian Intelligent Control Technology Co.,Ltd. Address before: 6/F, Building 1, Digital Entertainment Industrial Park, No. 75, Wenyi West Road, Xihu District, Hangzhou, Zhejiang, 310000 Patentee before: ZHEJIANG FONDA CONTROL TECHNOLOGY Co.,Ltd. |
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