CN205757213U - A kind of buck realizes circuit - Google Patents
A kind of buck realizes circuit Download PDFInfo
- Publication number
- CN205757213U CN205757213U CN201620666450.9U CN201620666450U CN205757213U CN 205757213 U CN205757213 U CN 205757213U CN 201620666450 U CN201620666450 U CN 201620666450U CN 205757213 U CN205757213 U CN 205757213U
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- oxide
- metal
- semiconductor
- signal
- electric capacity
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Abstract
This utility model relates to electronic cigarette field, particularly relates to a kind of buck and realizes circuit, and circuit includes: the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, inductance L, electric capacity Cin, electric capacity Cout, metal-oxide-semiconductor driving chip U1 and controller chip U2, this utility model just can complete the DC DC conversion of voltage only with two metal-oxide-semiconductors, metal-oxide-semiconductor driving chip U1, the voltage that controller chip U2 feeds back according to sampling resistor R1 and sampling resistor R2, by the output of HD signal and the dutycycle driving square wave of LD signal output of control and regulation metal-oxide-semiconductor driving chip U1, it is achieved boosting that output circuit is stable and buck functionality.
Description
Technical field
This utility model relates to electronic cigarette field, particularly relates to a kind of buck and realizes circuit.
Background technology
It is BUCK circuit and the knot of BOOST circuit that the high-power buck that power circuit in electronic cigarette is conventional realizes circuit
Close, use two-way MOS to drive, it is achieved four MOS combine the step-up/step-down circuit of inductance.This traditional circuit realiration is more multiple
Miscellaneous, device is more, and the electronic cigarette occasion strict at some volume requirements is limited greatly, and traditional circuit is in lifting
It is difficulty with seamlessly transitting on pressure switching point.
Utility model content
The purpose of this utility model is to provide a kind of simple and practical ground buck to realize circuit, it is intended to solve existing electronics
The problem that in cigarette, circuit is complicated, device is more.
This utility model provides a kind of buck and realizes circuit, including: the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, inductance
L, electric capacity Cin, electric capacity Cout, metal-oxide-semiconductor driving chip U1 and controller chip U2；
The drain electrode of the first metal-oxide-semiconductor Q1 and electric capacity CinOne end connect, and be connected to input power V togetherin；
The source electrode of the first metal-oxide-semiconductor Q1 is connected with one end of inductance L, the other end of inductance L and electric capacity CinThe other end connect,
And ground connection together；
The drain electrode of the second metal-oxide-semiconductor Q2 is connected with the source electrode of the first metal-oxide-semiconductor Q1, the source electrode of the second metal-oxide-semiconductor Q2 and electric capacity Cout's
One end connects, electric capacity CoutThe other end be connected with the other end of described inductance L, and ground connection together；
Metal-oxide-semiconductor driving chip U1 includes the input of PWM_IN signal, the output of HD signal, the output of LD signal, and described HD signal is defeated
Going out the grid with the first metal-oxide-semiconductor Q1 to be connected, the output of LD signal is connected with the grid of the second metal-oxide-semiconductor Q2；
Controller chip U2 includes pwm signal output, AD/COMP voltage sample processing unit and REF reference voltage list
Unit, the pwm signal output of controller chip U2 inputs with the PWM_IN signal of described metal-oxide-semiconductor driving chip U1 and is connected.
Further, circuit also includes sampling resistor R1, sampling resistor R2, and sampling resistor R1 connects with sampling resistor R2,
And with electric capacity CoutParallel connection, the junction point of sampling resistor R1 and sampling resistor R2 is connected to the AD/COMP voltage of controller chip U2
Sample processing unit.
The beneficial effects of the utility model:
1. this utility model just can complete the DC-DC of voltage only with two metal-oxide-semiconductors, a metal-oxide-semiconductor driving chip U1
Conversion.
2.MOS pipe driving chip U1 arranges the output of HD signal and LD signal is output as the pwm signal that two-way is complementary, thus real
Show the charging and discharging of whole circuit.
3. the voltage that controller chip U2 feeds back according to sampling resistor R1 and sampling resistor R2, by control and regulation metal-oxide-semiconductor
The HD signal output of driving chip U1 and the dutycycle driving square wave of LD signal output, it is achieved the stable boosting of output circuit and
Buck functionality.
The dutycycle of 4.MOS pipe driving chip U1 two-way pwm signal determines the ratio between output voltage and input voltage
Example relation, this utility model is achieved that the smooth buck transition of circuit by the dutycycle of simple adjustment two-way pwm signal.
Accompanying drawing explanation
A kind of buck in Fig. 1 this utility model one embodiment realizes the circuit diagram of circuit.
The square waveform schematic diagram of the metal-oxide-semiconductor driving chip U1 two-way pwm signal in Fig. 2 this utility model one embodiment.
A kind of buck in another embodiment of Fig. 3 this utility model realizes the circuit diagram of circuit.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the accompanying drawings and specifically
This utility model is described in further detail by embodiment.
A kind of buck in Fig. 1 this utility model one embodiment realizes the circuit diagram of circuit.With reference to Fig. 1, this practicality is new
Type embodiment provides a kind of buck and realizes circuit, including: the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, inductance L, electric capacity Cin, electricity
Hold Cout, metal-oxide-semiconductor driving chip U1 and controller chip U2；The drain electrode of the first metal-oxide-semiconductor Q1 and electric capacity CinOne end connect, and
It is connected to input power V togetherin；
The source electrode of the first metal-oxide-semiconductor Q1 is connected with one end of inductance L, the other end of inductance L and electric capacity CinThe other end connect,
And ground connection together；
The drain electrode of the second metal-oxide-semiconductor Q2 is connected with the source electrode of the first metal-oxide-semiconductor Q1, the source electrode of the second metal-oxide-semiconductor Q2 and electric capacity Cout's
One end connects, electric capacity CoutThe other end be connected with the other end of described inductance L, and ground connection together；
Metal-oxide-semiconductor driving chip U1 includes the input of PWM_IN signal, the output of HD signal, the output of LD signal, and described HD signal is defeated
Going out the grid with the first metal-oxide-semiconductor Q1 to be connected, the output of LD signal is connected with the grid of the second metal-oxide-semiconductor Q2；
Controller chip U2 uses pulse width modulator or Micro-processor MCV, and controller chip U2 includes that pwm signal is defeated
Go out, AD/COMP voltage sample processing unit and REF reference voltage unit, the pwm signal of controller chip U2 exports with described
The PWM_IN signal input of metal-oxide-semiconductor driving chip U1 connects, for controlling the pwm signal output of metal-oxide-semiconductor driving chip U1, REF
The effect of reference voltage unit is, the reference voltage level changing REF reference voltage unit just can change output voltage values.
Circuit also includes sampling resistor R1, sampling resistor R2, and sampling resistor R1 connects with sampling resistor R2, and and electric capacity
CoutParallel connection, the junction point of sampling resistor R1 and sampling resistor R2 is connected to the AD/COMP voltage sample of controller chip U2 and processes
Unit, controller chip U2 is by using resistance R1 to use the voltage in circuit with sampling resistor R2, thus controls to adjust
Save the dutycycle of two-way pwm signal square wave, output voltage can have been realized and change the most smoothly or output voltage is by height
To low stable change.
This utility model circuit realiration principle
This utility model embodiment is to realize the electric source topology of step-up/step-down circuit simply, electric capacity C in circuitin, a MOS
Pipe Q1, inductance L constitute the input circuit of circuit, inductance L, the second metal-oxide-semiconductor Q2, electric capacity C in circuitoutThe output constituting circuit is returned
Road, during energy conversion, controls the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 alternate conduction；When the first metal-oxide-semiconductor Q1 opens
Between section, second metal-oxide-semiconductor Q2 close, in output loop rely on electric capacity COUTPowering load, in input circuit, inductance L stores energy
Amount, electric current flows through inductance L from top to bottom, now inductance both end voltage be upper just (+) under negative (-)；When the first metal-oxide-semiconductor Q1 closes,
Second metal-oxide-semiconductor is opened simultaneously, and the charging input circuit of inductance L is cut off, and inductance L stops energy storage, in order to maintain inductance L electric current
Direction is constant, the voltage instantaneous at inductance two ends reversely under just (+) upper negative (-), output loop conducting simultaneously, inductance L energy discharges
Give load and output capacitance COUT.When the dutycycle driving square wave of the first metal-oxide-semiconductor Q1 is less than 50%, inductance L energy storage time
Short, discharge time is long, output voltage VoutWill be less than input voltage Vin；When the driving duty cycle square wave of the first metal-oxide-semiconductor Q1 is 50%
Time, inductance L energy storage and the time that releases energy are equal, output voltage VoutWill be equal to input voltage Vin；When driving of the first metal-oxide-semiconductor Q1
When dynamic duty cycle square wave is more than 50%, inductance L energy storage time is more than release time, output voltage VoutMore than from input voltage Vin。
Thus the dutycycle driving square wave regulating two metal-oxide-semiconductors can realize output voltage and changes the most smoothly or export
Voltage changes the most smoothly.Q1, Q2 are that the occasion of metal-oxide-semiconductor needs the PWM in two-way direction to be driven, thus realize
Synchronization lifting volt circuit, now power circuit efficiency comparison is high.
The square waveform schematic diagram of the metal-oxide-semiconductor driving chip U1 two-way pwm signal in Fig. 2 this utility model one embodiment.Ginseng
Examining Fig. 2, metal-oxide-semiconductor driving chip U1 and include the output of HD signal, the output of LD signal, two-way pwm signal is complementary square waveform signal,
Can drive the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 alternate conduction respectively, then control the dutycycle of two-way pwm signal square wave well,
Output voltage can be realized change the most smoothly or output voltage changes the most smoothly.
A kind of buck in another embodiment of Fig. 3 this utility model realizes the circuit diagram of circuit.Electricity with reference to Fig. 3, Fig. 3
Road figure is on the basis of the circuit diagram of Fig. 1, diode D1 instead of the second metal-oxide-semiconductor Q2 so that circuit diagram further simple,
Practicality, the annexation of other elements in circuit is consistent with the annexation in Fig. 1, and the principle that realizes of circuit with above-mentioned is also
Unanimously, it is not further described.
It will be apparent to those skilled in the art that can technical scheme as described above and design, make other various
Corresponding change and deformation, and all these change and deformation all should belong to the protection of this utility model claim
Within the scope of.
Claims (2)
1. a buck realizes circuit, it is characterised in that including: the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, inductance L, electric capacity
Cin, electric capacity Cout, metal-oxide-semiconductor driving chip U1, controller chip U2；The drain electrode of described first metal-oxide-semiconductor Q1 and electric capacity CinOne end
Connect, and be connected to input power V togetherin；
The source electrode of described first metal-oxide-semiconductor Q1 is connected with one end of described inductance L, the other end of described inductance L and electric capacity CinAnother
One end connects, and ground connection together；
The drain electrode of described second metal-oxide-semiconductor Q2 is connected with the source electrode of described first metal-oxide-semiconductor Q1, the source electrode of described second metal-oxide-semiconductor Q2 with
Described electric capacity CoutOne end connect, described electric capacity CoutThe other end be connected with the other end of described inductance L, and ground connection together；
Described metal-oxide-semiconductor driving chip U1 includes the input of PWM_IN signal, the output of HD signal, the output of LD signal, and described HD signal is defeated
Going out the grid with described first metal-oxide-semiconductor Q1 to be connected, the output of described LD signal is connected with the grid of described second metal-oxide-semiconductor Q2；
Described controller chip U2 includes pwm signal output, AD/COMP voltage sample processing unit and REF reference voltage list
Unit, the pwm signal output of described controller chip U2 inputs with the PWM_IN signal of described metal-oxide-semiconductor driving chip U1 and is connected.
A kind of buck the most according to claim 1 realizes circuit, it is characterised in that circuit also include sampling resistor R1,
Sampling resistor R2, described sampling resistor R1 connect with described sampling resistor R2, and with described electric capacity CoutParallel connection, described sampling electricity
The junction point of resistance R1 and described sampling resistor R2 is connected to the AD/COMP voltage sample processing unit of described controller chip U2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620666450.9U CN205757213U (en) | 2016-06-28 | 2016-06-28 | A kind of buck realizes circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620666450.9U CN205757213U (en) | 2016-06-28 | 2016-06-28 | A kind of buck realizes circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205757213U true CN205757213U (en) | 2016-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620666450.9U Expired - Fee Related CN205757213U (en) | 2016-06-28 | 2016-06-28 | A kind of buck realizes circuit |
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| Country | Link |
|---|---|
| CN (1) | CN205757213U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107095343A (en) * | 2017-05-24 | 2017-08-29 | 惠州市新泓威科技有限公司 | The heating means of electronic smoking set |
-
2016
- 2016-06-28 CN CN201620666450.9U patent/CN205757213U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107095343A (en) * | 2017-05-24 | 2017-08-29 | 惠州市新泓威科技有限公司 | The heating means of electronic smoking set |
| CN107095343B (en) * | 2017-05-24 | 2020-05-12 | 惠州市新泓威科技有限公司 | Heating method of electronic smoking set |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20170628 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |