CN209627235U - Voltage conversion circuit and electronic device - Google Patents
Voltage conversion circuit and electronic device Download PDFInfo
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- CN209627235U CN209627235U CN201920397251.6U CN201920397251U CN209627235U CN 209627235 U CN209627235 U CN 209627235U CN 201920397251 U CN201920397251 U CN 201920397251U CN 209627235 U CN209627235 U CN 209627235U
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Abstract
The utility model relates to technical field of integrated circuits, a kind of voltage conversion circuit and electronic device are disclosed.The voltage conversion circuit includes boost module, control module and feedback module.The input terminal of boost module is for connecting power supply, and the output end of boost module is for connecting load, and then the output voltage that will be boosted from the received input voltage of power supply into output to load；The input terminal of control module is for connecting power supply, using using input voltage as operating voltage, the control terminal of the output end connection boost module of control module controls signal to provide to boost module；Feedback module is connected between the output end of boost module and the input terminal of control module, and then output voltage is fed back to the input terminal of control module, for compensating the operating voltage of control module.By the above-mentioned means, the utility model can improve the stability of voltage conversion circuit work and improve the electricity utilization rate of power supply.
Description
Technical field
The utility model relates to technical field of integrated circuits, fill more particularly to a kind of voltage conversion circuit and electronics
It sets.
Background technique
In current electronic device, the operating voltage for the load that integrated circuit is connected in electronic device is usually above electricity
Voltage provided by the power supply of sub-device, this just needs to be mentioned the power supply of electronic device using the booster circuit in electronic device
Operating voltage of the voltage increase of confession to needed for loading.
However, voltage provided by the power supply of electronic device can disappearing with electricity in the use process of electronic device
It consumes and reduces, and will affect voltage provided by power supply when curent change at load, cause booster circuit cannot normal work
Make and the electricity utilization rate of power supply is relatively low.
Utility model content
In view of this, the utility model is mainly solving the technical problems that provide a kind of voltage conversion circuit and electronics dress
It sets, the stability of voltage conversion circuit work can be improved and improves the electricity utilization rate of power supply.
In order to solve the above technical problems, the technical solution that the utility model uses is: providing a kind of voltage conversion electricity
Road, the voltage conversion circuit include boost module, control module and feedback module.The input terminal of boost module is for connecting electricity
Source, the output end of boost module will boost from the received input voltage of power supply into output to load for connecting load
Output voltage；The input terminal of control module is for connecting power supply, using using input voltage as operating voltage, control module it is defeated
Outlet connects the control terminal of boost module, to provide control signal to boost module；Feedback module is connected to the defeated of boost module
Between outlet and the input terminal of control module, and then output voltage is fed back to the input terminal of control module, for compensating control
The operating voltage of module.
In an embodiment of the utility model, feedback module includes the first one-way conduction element, the first one-way conduction member
The output end of the input terminal connection boost module of part, the input terminal of the output end link control module of the first one-way conduction element,
First one-way conduction element is used to limit the one-way conduction of the input terminal from the output end of boost module to control module.
In an embodiment of the utility model, the first one-way conduction element is diode.
In an embodiment of the utility model, feedback module includes voltage-stablizer, the input terminal connection boosting mould of voltage-stablizer
The output end of block, the input terminal of the output end link control module of voltage-stablizer, voltage-stablizer is for output voltage to be converted into making a reservation for
Constant voltage after feed back to the input terminal of control module.
In an embodiment of the utility model, voltage conversion circuit further comprises isolation module, isolation module connection
Between power supply and the input terminal of control module, for limiting the one-way conduction of the input terminal from power supply to control module.
In an embodiment of the utility model, isolation module includes the second one-way conduction element, the second one-way conduction member
The input terminal of part is for connecting power supply, and the input terminal of the output end link control module of the second one-way conduction element, second is unidirectional
Breakover element is used to limit the one-way conduction of the input terminal from power supply to control module.
In an embodiment of the utility model, control module includes pwm generator, to provide to boost module
Pulse-width signal.
In an embodiment of the utility model, boost module includes the first energy-storage travelling wave tube, switch and the second energy storage member
Part.The input terminal of first energy-storage travelling wave tube is used to connect the anode of power supply；The output end of the control terminal link control module of switch, is opened
The first connecting pin closed connects the output end of the first energy-storage travelling wave tube, and the second connection end of switch is used to connect the cathode of power supply, opens
It closes and is connected and disconnects under the control of pulse-width signal, so that the first energy-storage travelling wave tube stores electric energy in switch conduction, and
Electric energy is discharged when switching and disconnecting；The anode of second energy-storage travelling wave tube is connect with the output end of the first energy-storage travelling wave tube, the second energy storage member
For connecting with the cathode of power supply, load is parallel between the anode and cathode of the second energy-storage travelling wave tube the cathode of part.
In an embodiment of the utility model, the first energy-storage travelling wave tube is inductance, and the second energy-storage travelling wave tube is capacitor, and boost mould
Block further includes third one-way conduction element, and the input terminal of third one-way conduction element connects the output end of the first energy-storage travelling wave tube, the
The output end of three one-way conduction elements connects the anode of the second energy-storage travelling wave tube, and third one-way conduction element is for limiting from the first storage
Can element output end to boost module output end one-way conduction.
In order to solve the above technical problems, another technical solution that the utility model uses is: a kind of electronic device is provided,
The electronic device includes the voltage conversion circuit illustrated such as above-described embodiment.
The beneficial effects of the utility model are: being different from the prior art, the utility model provides a kind of voltage conversion circuit,
Feedback module in the voltage conversion circuit will export to the output voltage of load the input terminal for feeding back to control module, for mending
Repay the operating voltage of control module.I.e. on the basis of power supply provides operating voltage to control module, feedback module is to being applied to
The operating voltage of control module compensates, and power supply and feedback module participate in providing operating voltage to control module jointly.So
One, at least when the operating voltage that power supply is provided to control module is lower than the minimum operating voltage that control module works normally,
Feedback module can compensate the operating voltage for being applied to control module, control module be worked normally, in turn
So that voltage conversion circuit works normally, to improve the stability of voltage conversion circuit work.Also, due to the electricity of feedback module
Press compensation function so that the power supply of lower remaining capacity still can driving voltage conversion circuit work normally, to improve
The electricity utilization rate of power supply.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.Wherein:
Fig. 1 is the structural schematic diagram of the utility model voltage conversion circuit first embodiment；
Fig. 2 is the structural schematic diagram of the utility model voltage conversion circuit second embodiment；
Fig. 3 is the structural schematic diagram of the utility model voltage conversion circuit 3rd embodiment；
Fig. 4 is the structural schematic diagram of one embodiment of the utility model electronic device.
Specific embodiment
It is understandable to enable the above objects, features, and advantages of the utility model to become apparent, with reference to the accompanying drawing, to this
The specific embodiment of utility model is described in detail.It is understood that specific embodiment described herein is only used for
Explanation the utility model, rather than the restriction to the utility model.It also should be noted that for ease of description, in attached drawing
Illustrate only part relevant to the utility model rather than entire infrastructure.Based on the embodiments of the present invention, this field is general
Logical technical staff all other embodiment obtained without making creative work belongs to the utility model guarantor
The range of shield.
Term " first ", " second " in the utility model etc. are for distinguishing different objects, rather than for describing spy
Fixed sequence.In addition, term " includes " and " having " and their any deformations, it is intended that cover and non-exclusive include.Such as
The process, method, system, product or equipment for containing a series of steps or units are not limited to listed step or list
Member, but optionally further comprising the step of not listing or unit, or optionally further comprising for these process, methods, product
Or other step or units that equipment is intrinsic.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
It is contained at least one embodiment of the utility model., which there is the phrase, in each position in the description to be each meant
Identical embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art are explicit
Ground and implicitly understand, embodiment described herein can be combined with other embodiments.
Referring to Fig. 1, Fig. 1 is the structural schematic diagram of the utility model voltage conversion circuit first embodiment.
For solve booster circuit work in the prior art stability is poor and the lower skill of utilization rate of electric quantity of power supply
Art problem, an embodiment of the utility model provide a kind of voltage conversion circuit 1, which includes boost module
11, control module 12 and feedback module 13.The input terminal of boost module 11 is for connecting power supply 2, the output end of boost module 11
For connecting load 3, and then the output voltage that will be boosted from the received input voltage of power supply 2 at output to load 3；Control module
12 input terminal is for connecting power supply 2, using using the input voltage as operating voltage, the output end of control module 12, which connects, to be risen
The control terminal of die block 11, to provide control signal to boost module 11；Feedback module 13 is connected to the output of boost module 11
It holds between the input terminal of control module 12, and then the output voltage is fed back to the input terminal of control module 12, for compensating
The operating voltage of control module 12.It is described in detail below.
Fig. 2 is the structural schematic diagram of the utility model voltage conversion circuit second embodiment referring to FIG. 1-2,.
In one embodiment, voltage conversion circuit 1 includes boost module 11.The input terminal of boost module 11 is for connecting electricity
Source 2, the output end of boost module 11 is for connecting load 3.Power supply 2 is used to provide the electricity for driving load 3 to work normally to load 3
Pressure.For the electronic device of the loudspeaker forms such as sound equipment, earphone, load 3 is variation (related with volume etc.).
When electronic device exports the audio-frequency information of larger volume, the electric current that load 3 is flowed through in voltage conversion circuit 1 is larger, accordingly
The operating voltage that load 3 works normally is with regard to larger, it will usually be greater than operating voltage provided by power supply 2.It can for proof load 3
It works normally, it is necessary to the output voltage that boost module 11 will boost from the received input voltage of power supply 2 at output to load 3.
It is understood that the voltage of voltage conversion circuit 1 is input to for power supply 2 from the received input voltage of power supply 2.Wherein, power supply 2
Voltage conversion circuit 1 is not affiliated with load 3.
Voltage conversion circuit 1 further includes control module 12.The input terminal of control module 12 is for connecting power supply 2, to utilize
The input voltage that power supply 2 provides drives control module 12 to work as operating voltage.The output end of control module 12 connects boosting
The control terminal of module 11, to provide control signal to boost module 11, control signal will be from for controlling that boost module 11 completes
The boosting of the received input voltage of power supply 2 is at output to the work for the output voltage for loading 3.
For the electronic device for loudspeaker forms such as sound equipment, earphones, load 3 is variation.Work as electricity
When sub-device exports the audio-frequency information of larger volume, the electric current that load 3 is flowed through in voltage conversion circuit 1 is larger, i.e., voltage is converted
Electric current in circuit 1 is larger, and the pressure drop that this is allowed for inside power supply 2 is larger, and input voltage provided by power supply 2 is smaller, very
Required minimum operating voltage is worked normally to control module 12 is likely less than, causes 12 cisco unity malfunction of control module, into
And lead to entire 1 delay machine of voltage conversion circuit, the output voltage of voltage conversion circuit 1 output to load 3 is abnormal even without output,
The entire power supply system of electronic device can collapse, and work is abnormal.
In view of this, the voltage conversion circuit 1 of the present embodiment further includes feedback module 13.Feedback module 13 is connected to boosting
Between the output end of module 11 and the input terminal of control module 12, and then the output voltage of output to load 3 is fed back into control
The input terminal of module 12, and the output voltage is still also used to that load 3 is driven to work normally.In this way, at least prominent in load 3
So increase, the operating voltage that power supply 2 is provided to control module 12 is lower than the minimum operating voltage that control module 12 works normally
In the case of, the above-mentioned output voltage of the input terminal of the fed back to control module 12 of feedback module 13 (is exported to the output of load 3
Voltage) operating voltage for being applied to control module 12 can be compensated so that the operating voltage of control module 12 compensate to
Not less than the minimum operating voltage that it is worked normally, that is, control module 12 is enabled to work normally, so that voltage is converted
Circuit 1 works normally, and avoids 1 delay machine of voltage conversion circuit, to improve the stability of the work of voltage conversion circuit 1.That is,
Power supply 2 and feedback module 13 participate in providing operating voltage to control module 12 jointly.At least provided in power supply 2 to control module 12
Operating voltage lower than the minimum operating voltage that control module 12 works normally when, feedback module 13 can be to being applied to control mould
The operating voltage of block 12 compensates.Also, due to the voltage compensating function of feedback module 13, so that the electricity of lower remaining capacity
Source 2 (being not enough to provide the operating voltage of the normal work of control module 12 in traditional design) still being capable of driving voltage conversion circuit
1 works normally, to improve the electricity utilization rate of power supply 2.
Even if it should be noted that being not less than control module 12 just in the operating voltage that power supply 2 is provided to control module 12
When the minimum operating voltage often to work, feedback module 13 will export to the output voltage of load 3 and feed back to control module 12
Input terminal.
Please continue to refer to Fig. 1-2.In one embodiment, feedback module 13 includes the first one-way conduction element 131.First is single
To the output end of the input terminal of breakover element 131 connection boost module 11, the output end of the first one-way conduction element 131 connects control
The input terminal of molding block 12.First one-way conduction element 131 is for limiting from the output end of boost module 11 to control module 12
Input terminal one-way conduction, i.e., only allow electric current from the input terminal for flowing to control module 12 from the output end of boost module 11,
Do not allow reverse direction current flow, to prevent current flowing backwards.The design of first one-way conduction element 131 only allows electric current from from liter
The output end of die block 11 flow to the input terminal of control module 12, and electric current is not allowed to flow to boosting from the input terminal of control module 12
The output end of module 11, the electric current for preventing power supply 2 to be supplied to control module 12 flow to boost module 11 by feedback module 13
Output end influences the normal work of control module 12.
Preferably, the first one-way conduction element 131 can be diode etc..Using the characteristic of the one-way conduction of diode,
The one-way conduction for limiting the input terminal from the output end of boost module 11 to control module 12, prevents current flowing backwards.Diode is made
For the first one-way conduction element 131, cost is relatively low, advantageously reduces the design cost of voltage conversion circuit 1.Wherein about two
The structure and working principle of pole pipe belong to the understanding scope of those skilled in the art, and details are not described herein again.
Please continue to refer to Fig. 1-2.In one embodiment, voltage conversion circuit 1 further comprises isolation module 14.Isolation mode
Block 14 is connected between power supply 2 and the input terminal of control module 12, for limiting from power supply 2 to the input terminal of control module 12
One-way conduction, also for preventing current flowing backwards.Specifically, isolation module 14 is designed for preventing from boost module 11
The current flowing backwards of output end make the electric current from 11 output end of boost module flow through control module 12 to power supply 2, with electricity
Source 2 participates in that control module 12 is driven to work normally jointly, realizes the voltage compensating function of feedback module 13.
Further, isolation module 14 includes the second one-way conduction element 141.The input of second one-way conduction element 141
End is for connecting power supply 2, to receive the input voltage from power supply 2.The output end of second one-way conduction element 141 connects control
The input terminal of module 12, the output end of feedback module 13 are connected to the output end and control module of the second one-way conduction element 141
Between 12 input terminal.Second one-way conduction element 141 is used to limit unidirectionally leading from power supply 2 to the input terminal of control module 12
It is logical, i.e., only electric current is allowed to flow to the input terminal of control module 12 from power supply 2, does not allow reverse direction current flow, to prevent electric current anti-
It fills.
Preferably, the second one-way conduction element 141 can be diode etc..Using the characteristic of the one-way conduction of diode,
It limits from power supply 2 to the one-way conduction of the input terminal of control module 12, prevents current flowing backwards.Diode is as the second one-way conduction
Cost is relatively low for element 141, advantageously reduces the design cost of voltage conversion circuit 1.
Please continue to refer to Fig. 1-2.In one embodiment, control module 12 includes 121 (PWM of pwm generator
CONTROL).Pwm generator 121 is used to provide pulse-width signal (control as described above to boost module 11
Signal), pulse-width signal is completed will to boost from the received input voltage of power supply 2 into output to negative for controlling boost module 11
Carry the work of 3 output voltage.
Boost module 11 includes the first energy-storage travelling wave tube 111 and switch 112.The input terminal of first energy-storage travelling wave tube 111 is for connecting
Connect the anode of power supply 2.The output end of 1123 link control module 12 of control terminal of switch 112, the first connecting pin of switch 112
The output end of 1121 the first energy-storage travelling wave tubes 111 of connection, the second connection end 1122 of switch 112 are used to connect the cathode of power supply 2, open
It closes 112 to be connected and disconnect under the control of pulse-width signal, so that the first energy-storage travelling wave tube 111 is deposited when switch 112 is connected
Storage energy, and electric energy is discharged when switch 112 disconnects.Wherein, switch 112 can manage (Metal-oxide-semicondutor field for mos
Effect transistor) etc., the grid of switch 112 is its control terminal 1123, and the source of switch 112, drain electrode are its first connecting pin
1121, second connection end 1122.Wherein, the first connecting pin 1121 can be source electrode or the drain electrode of switch 112, second connection end
1122 be the source electrode or drain electrode different from the first connecting pin 1121, such as the first connecting pin 1121 is the source electrode of switch 112
When, second connection end 1122 is the drain electrode of switch 112.Pulse-width signal includes high level signal and low level signal, when
When the 1123 input high level signal of control terminal of switch 112, the first connecting pin 1121 of switch 112 and second connection end 1122 are led
Logical, i.e., switch 112 is connected, and is directly back to the negative of power supply 2 by switch 112 by the electric current of the first energy-storage travelling wave tube 111 at this time
Pole, and without load 3, the first energy-storage travelling wave tube 111 stores electric energy；When the 1123 input low level signal of control terminal of switch 112
When, the first connecting pin 1121 of switch 112 and second connection end 1122 disconnect, i.e., switch 112 disconnects, at this time the first energy-storage travelling wave tube
111 release electric energy, are superimposed and are acted on the electric energy of power supply 2 load 3, achieve the purpose that boosting, i.e., will be received from power supply 2
Input voltage boosting is at output to the output voltage of load 3.
Boost module 11 further includes the second energy-storage travelling wave tube 113.Anode and the first energy-storage travelling wave tube of second energy-storage travelling wave tube 113
111 output end connection, for the cathode of the second energy-storage travelling wave tube 113 for connecting with the cathode of power supply 2, load 3 is parallel to the second storage
Between the anode and cathode of energy element 113.Since load 3 and the second energy-storage travelling wave tube 113 are parallel relationship, the electricity at 3 both ends is loaded
Pressure is equal to the voltage at 113 both ends of the second energy-storage travelling wave tube.Second energy-storage travelling wave tube 113 is for storing from power supply 2 and the first energy storage member
The electric energy of part 111 simultaneously acts on load 3, being capable of steady operation with proof load 3.
Further, the first energy-storage travelling wave tube 111 can be inductance, can convert electrical energy into magnetic energy and store,
Achieve the effect that energy storage.Second energy-storage travelling wave tube 113 can be capacitor, in parallel with load 3, come from power supply 2 and first for storing
The electric energy of energy-storage travelling wave tube 111 simultaneously acts on load 3, being capable of steady operation with proof load 3.
Boost module 11 further includes third one-way conduction element 114.The input terminal connection the of third one-way conduction element 114
The output end of one energy-storage travelling wave tube 111, the output end of third one-way conduction element 114 connect the anode of the second energy-storage travelling wave tube 113.The
Three one-way conduction elements 114 are used to limit the unidirectional of the output end from the output end of the first energy-storage travelling wave tube 111 to boost module 11
Conducting, is equally used for preventing current flowing backwards, only electric current is allowed to flow to boost module 11 from the output end of the first energy-storage travelling wave tube 111
Output end does not allow electric current from the positive reverse flow of the second energy-storage travelling wave tube 113, so that the second energy-storage travelling wave tube 113 was stored
Electric energy acts only on load 3,3 steady operation of proof load.
Third one-way conduction element 114 can be as the first one-way conduction element 131, the second one-way conduction element 141
For diode etc..Using the characteristic of the one-way conduction of diode, limit from the output end of the first energy-storage travelling wave tube 111 to the second energy storage
The one-way conduction of the anode of element 113, prevents current flowing backwards.Cost is relatively low as third one-way conduction element 114 for diode,
Advantageously reduce the design cost of voltage conversion circuit 1.
The working principle of voltage conversion circuit 1 is illustrated in general below:
Pwm generator 121 receives operating voltage from power supply 2 and feedback module 13 and exports the pulsewidth tune of high level
Signal processed is connected switch 112, passes through the electric current of the first energy-storage travelling wave tube 111 without overload 3, but straight by switch 112
It takes back and flow to 2 cathode of power supply, the first energy-storage travelling wave tube 111 stores electric energy at this time.Then, pwm generator 121 exports low electricity
Flat pulse-width signal disconnects switch 112, and the first energy-storage travelling wave tube 111 discharges electric energy, the first energy-storage travelling wave tube 111 and electricity at this time
The electric energy in source 2 is superimposed and acts on load 3, and boosting, to the output voltage of load 3, achievees the purpose that boosting at output.Meanwhile by
In the voltage compensating function of feedback module 13, it can also guarantee the input terminal input of control module 12 when 3 electric currents of load are larger
Enough operating voltages prevent 1 delay machine of voltage conversion circuit, to improve the stability of the work of voltage conversion circuit 1；And it is lower
The power supply 2 of remaining capacity still can drive control module 12 work normally, to improve the electricity utilization rate of power supply 2.
In conclusion the feedback module in voltage conversion circuit provided by the utility model will be exported to the output of load
Voltage Feedback to control module input terminal, for compensating the operating voltage of control module.Provided in power supply to control module
On the basis of operating voltage, feedback module compensates the operating voltage for being applied to control module, and power supply and feedback module are total
It is same to participate in providing operating voltage to control module.In this way, at least be lower than in power supply to the operating voltage that control module provides
When the minimum operating voltage that control module works normally, feedback module can mend the operating voltage for being applied to control module
It repays, control module is worked normally, so that voltage conversion circuit works normally, to improve voltage conversion circuit work
The stability of work.Also, due to the voltage compensating function of feedback module, so that the power supply of lower remaining capacity can still drive
Voltage conversion circuit works normally, to improve the electricity utilization rate of power supply.
Referring to Fig. 3, Fig. 3 is the structural schematic diagram of the utility model voltage conversion circuit 3rd embodiment.
In one embodiment, voltage conversion circuit 1 includes boost module 11, control module 12 and feedback module 13.Boosting
The input terminal of module 11 will be received for connecting power supply 2, the output end of boost module 11 for connecting load 3 from power supply 2
Input voltage boosting at output to load 3 output voltage.The input terminal of control module 12 is for connecting power supply 2, to utilize
Input voltage is as operating voltage, the control terminal of the output end connection boost module 11 of control module 12, with to boost module 11
Control signal is provided.Feedback module 13 is connected between the output end of boost module 11 and the input terminal of control module 12, in turn
Output voltage is fed back to the input terminal of control module 12.
The present embodiment and above-described embodiment the difference is that, feedback module 13 may include voltage-stablizer 132.Voltage-stablizer
The output end of 132 input terminal connection boost module 11, the input terminal of the output end link control module 12 of voltage-stablizer 132.Surely
While depressor 132 is used to limit the one-way conduction of the input terminal from the output end of boost module 11 to control module 12, it is used for
It is converted into the output voltage of output to load 3 to feed back to the input terminal of control module 12 after scheduled constant voltage.
For the one-way conductions element such as diode, while voltage-stablizer 132 has one-way conduction function, also
Has the function that the output voltage of output to load 3 is converted into scheduled constant voltage.Voltage-stablizer 132 can be according to practical electricity
Road needs, and adjusts the voltage compensation quantity of feedback module 13, so that the operating voltage that the input terminal of control module 12 inputs is in control
Within the scope of the normal working voltage of molding block 12, guarantees that control module 12 works normally, avoid the operating voltage of control module 12
It is too high or too low.Simultaneously as there are certain pressure drop and output extremely loads 3 for the one-way conductions such as diode element itself
Output voltage be not be steady state value, therefore the feedback module 13 being made of the one-way conductions element such as diode its output
Voltage is not stable.And voltage-stablizer 132 can export scheduled constant voltage, the voltage of output is stable.
Referring to Fig. 4, Fig. 4 is the structural schematic diagram of one embodiment of the utility model electronic device.
In one embodiment, electronic device includes voltage conversion circuit 1.Further, electronic device further includes 2 He of power supply
Load 3.Voltage conversion circuit 1 is used for the output voltage from the boosting of the received input voltage of power supply 2 at output to load 3.Its
In, voltage conversion circuit 1 is by the voltage conversion circuit illustrated in above-described embodiment, and details are not described herein again.Electronic device can
Think the electronic device of the loudspeaker forms such as sound equipment, earphone, it is not limited here.
The foregoing is merely the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
It is equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, directly or indirectly uses
In other related technical areas, it is also included in the patent protection scope of the utility model.
Claims (10)
1. a kind of voltage conversion circuit, which is characterized in that the voltage conversion circuit includes:
Boost module, for the input terminal of the boost module for connecting power supply, the output end of the boost module is negative for connecting
The output voltage that carries, and then will boost from the received input voltage of the power supply into output to the load；
Control module, the input terminal of the control module is for connecting the power supply, using the input voltage as work
Voltage, the output end of the control module connect the control terminal of the boost module, to provide control letter to the boost module
Number；
Feedback module, the feedback module be connected to the boost module output end and the control module input terminal it
Between, and then the output voltage is fed back to the input terminal of the control module, for compensating the work electricity of the control module
Pressure.
2. voltage conversion circuit according to claim 1, which is characterized in that the feedback module includes the first one-way conduction
Element, the input terminal of the first one-way conduction element connect the output end of the boost module, the first one-way conduction member
The output end of part connects the input terminal of the control module, and the first one-way conduction element is for limiting from the boost module
Output end to the control module input terminal one-way conduction.
3. voltage conversion circuit according to claim 2, which is characterized in that the first one-way conduction element is two poles
Pipe.
4. voltage conversion circuit according to claim 1, which is characterized in that the feedback module includes voltage-stablizer, described
The input terminal of voltage-stablizer connects the output end of the boost module, and the output end of the voltage-stablizer connects the defeated of the control module
Enter end, the output voltage for being converted into feeding back to the defeated of the control module after scheduled constant voltage by the voltage-stablizer
Enter end.
5. voltage conversion circuit according to claim 1, which is characterized in that the voltage conversion circuit further comprise every
From module, the isolation module is connected between the power supply and the input terminal of the control module, for limiting from the electricity
Source to the control module input terminal one-way conduction.
6. voltage conversion circuit according to claim 5, which is characterized in that the isolation module includes the second one-way conduction
Element, the input terminal of the second one-way conduction element is for connecting the power supply, the output of the second one-way conduction element
End connects the input terminal of the control module, and the second one-way conduction element is for limiting from the power supply to the control mould
The one-way conduction of the input terminal of block.
7. voltage conversion circuit according to claim 1, which is characterized in that the control module includes pulsewidth modulation
Device, to provide pulse-width signal to the boost module.
8. voltage conversion circuit according to claim 7, which is characterized in that the boost module includes:
First energy-storage travelling wave tube, the input terminal of first energy-storage travelling wave tube are used to connect the anode of the power supply；
Switch, the control terminal of the switch connect the output end of the control module, and the first connecting pin of the switch connects institute
The output end of the first energy-storage travelling wave tube is stated, the second connection end of the switch is used to connect the cathode of the power supply, and the switch exists
It is connected and disconnects under the control of the pulse-width signal, so that first energy-storage travelling wave tube is stored in the switch conduction
Electric energy, and electric energy is discharged when the switch disconnects；
The anode of second energy-storage travelling wave tube, second energy-storage travelling wave tube is connect with the output end of first energy-storage travelling wave tube, and described the
The cathode of two energy-storage travelling wave tubes is described to load the anode for being parallel to second energy-storage travelling wave tube for connecting with the cathode of the power supply
Between cathode.
9. voltage conversion circuit according to claim 8, which is characterized in that first energy-storage travelling wave tube is inductance, described
Second energy-storage travelling wave tube is capacitor, and the boost module further includes third one-way conduction element, the third one-way conduction element
Input terminal connects the output end of first energy-storage travelling wave tube, the output end connection of the third one-way conduction element second storage
The anode of energy element, the third one-way conduction element is for limiting from the output end of first energy-storage travelling wave tube to the boosting
The one-way conduction of the output end of module.
10. a kind of electronic device, which is characterized in that the electronic device includes voltage as described in any one of claim 1 to 9
Conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920397251.6U CN209627235U (en) | 2019-03-26 | 2019-03-26 | Voltage conversion circuit and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920397251.6U CN209627235U (en) | 2019-03-26 | 2019-03-26 | Voltage conversion circuit and electronic device |
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| CN209627235U true CN209627235U (en) | 2019-11-12 |
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| CN201920397251.6U Active CN209627235U (en) | 2019-03-26 | 2019-03-26 | Voltage conversion circuit and electronic device |
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| CN (1) | CN209627235U (en) |
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