CN207853533U - A kind of power supply circuit - Google Patents
A kind of power supply circuit Download PDFInfo
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- CN207853533U CN207853533U CN201820222374.1U CN201820222374U CN207853533U CN 207853533 U CN207853533 U CN 207853533U CN 201820222374 U CN201820222374 U CN 201820222374U CN 207853533 U CN207853533 U CN 207853533U
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- power supply
- voltage
- controllable switch
- load
- circuit
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Abstract
The utility model embodiment discloses a kind of power supply circuit, and for being load supplying, power supply circuit includes power supply, control circuit, controllable switch and regulator circuit；Control circuit is connect with power supply and controllable switch respectively；Controllable switch is connected with power supply and load respectively；Regulator circuit is connected with power supply and load respectively.Pass through the technical solution of application the utility model embodiment, when the voltage of power supply is larger, control circuit controls controllable switch and disconnects, and the voltage of power supply is converted to a smaller input voltage by regulator circuit at this time, to reduce the power consumption of load, reduce the calorific value of load；When the voltage of power supply is smaller, control circuit controls controllable switch conducting, and controllable switch is by regulator circuit short circuit at this time, by power supply directly to load supplying, to reduce the pressure drop of supply voltage, it is ensured that load can work normally.As it can be seen that the voltage range that power supply circuit disclosed in the utility model embodiment can be applicable in is wide, reliability is high.
Description
Technical field
The utility model is related to power electronics field more particularly to a kind of power supply circuits.
Background technology
With the development of power electronic technique, power electronic equipment works with people, the relationship of life is increasingly close, and several
All power electronic equipments all be unable to do without reliable power supply.Especially in electric vehicle field, the reliability of Switching Power Supply is wanted
Ask higher and higher.One of the key factor for influencing reliability is exactly temperature.(Pulse Width Modulation, pulse are wide by PWM
Degree modulation) core devices of the chip as Switching Power Supply, its power consumption how is reduced, and then reduce its temperature, ensures it reliably
Work, becomes the problem of everybody becomes more concerned with.
Influencing PWM chip power consumption, there are two factors, first, the input voltage of chip.I.e. chip is the defeated of acquisition fixed amplitude
Voltage-stablizer is gone out built in voltage, the pressure drop of voltage-stablizer is bigger, and power consumption is bigger, so reducing the bigger core of input voltage of chip
Piece power consumption is bigger.Another is exactly that chip exports energy needed for foot-powered switching tube.
China's electric vehicle low tension battery is generally divided into two kinds of 12V and 24V, and being equivalent to Switching Power Supply, there are two types of input electricity
Pressure.In the prior art, the energy driven according to the level of accumulator and power tube is needed to adjust the resistance value of dropping resistor, and
Reduce the supply voltage of PWM chip by increasing the pressure drop on dropping resistor, to reach reduce PWM chip internal power consumption,
Reduce the purpose of PWM chip fever.
Prior art has the following problems：First, needing the parameter (resistance of dropping resistor of continuous adjustment circuit plate
Value), the complicated for operation and scope of application is small；Second, the reduction chip power-consumption that cannot stablize, for example, it is relatively low when encountering cell voltage,
When driving load is larger, resistance value is improper will to cause PWM chip supply voltage too low without working.
Utility model content
The utility model embodiment proposes a kind of power supply circuit, and the defeated of load can be automatically adjusted in different voltage ranges
Enter voltage, stable reduction load power consumption reduces the calorific value of load.
The utility model embodiment proposes a kind of power supply circuit, for being load supplying, the power supply circuit include power supply,
Control circuit, controllable switch and regulator circuit；The control circuit is connect with the power supply and the controllable switch respectively；
The controllable switch is connected with the power supply and the load respectively；The regulator circuit respectively with the power supply and described
Load connection；Wherein：
When the supply voltage of the power supply is more than preset first voltage threshold value, the control circuit control is described controllable
Switch disconnects, to provide stable input voltage from the regulator circuit to the load；It is small in the supply voltage of the power supply
When preset second voltage threshold value, the control circuit controls the controllable switch conducting, with by the power supply directly to institute
State load supplying.
Its further technical solution is, the control circuit includes first resistor and the first voltage-stabiliser tube, described first
The anode of one end of resistance and the power supply connect, the cathode of the other end of the first resistor and first voltage-stabiliser tube and
The controllable switch connection, the anode of first voltage-stabiliser tube are connect with the cathode of the power supply.
Its further technical solution is, the controllable switch includes input, output end and control terminal, described controllable
The input terminal of switch and the anode of power supply connect, and the output end of the controllable switch is connected with the load, the controllable switch
Control terminal connect with the first resistor.
Its further technical solution is, the regulator circuit includes second resistance and the second voltage-stabiliser tube, described second
The anode of one end of resistance and the power supply connect, the cathode of the other end of the second resistance and second voltage-stabiliser tube and
The load connection, the anode of second voltage-stabiliser tube are connect with the cathode of the power supply.
Its further technical solution is that the control circuit further includes the first capacitance, first capacitance and described the
One voltage-stabiliser tube is connected in parallel.
Its further technical solution is that the regulator circuit further includes the second capacitance, second capacitance and described the
Two voltage-stabiliser tubes are connected in parallel.
Its further technical solution is that the controllable switch is triode.
Its further technical solution is that the controllable switch is metal-oxide-semiconductor.
Its further technical solution is that the load is PWM chip.
Its further technical solution is that the power supply is accumulator.
By the technical solution of application the utility model embodiment, when the voltage of power supply is larger, control circuit control can
Control switch disconnects, and the voltage of power supply is converted to a smaller input voltage by regulator circuit at this time, to reduce load
Power consumption reduces the calorific value of load；When the voltage of power supply is smaller, control circuit controls controllable switch conducting, at this time controllably
Switch is by regulator circuit short circuit, by power supply directly to load supplying, to reduce the pressure drop of supply voltage, it is ensured that load energy
Enough normal works.As it can be seen that the good compatibility for the power supply circuit that the utility model embodiment proposes, the voltage range that can be applicable in
Width, reliability are high；And above procedure is participated in without artificial, and easy to operate, user experience is good.
Description of the drawings
It is required in being described below to embodiment to make in order to illustrate more clearly of the utility model embodiment technical solution
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is some embodiments of the utility model, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of schematic block diagram for power supply circuit that the utility model embodiment proposes；
Fig. 2 is a kind of circuit diagram for power supply circuit that the utility model embodiment proposes.
Reference numeral
10, power supply；20, control circuit；30, controllable switch；40, regulator circuit；50, it loads.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, the technical solution in embodiment is carried out it is clear, complete
Ground describes, and similar reference numerals represent similar component in attached drawing.Obviously, will be described below embodiment is only this practicality
Novel a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without creative efforts belongs to the model of the utility model protection
It encloses.
It should be appreciated that ought use in this specification and in the appended claims, term " comprising " and "comprising" instruction
Described feature, entirety, step, operation, the presence of element and/or component, but one or more of the other feature, whole is not precluded
Body, step, operation, element, component and/or its presence or addition gathered.
It is also understood that specific merely for the sake of describing in this utility model embodiment term used in the description
The purpose of embodiment and be not intended to limit the utility model embodiment.Such as in the utility model embodiment specification and appended power
As used in sharp claim, other situations unless the context is clearly specified, otherwise " one " of singulative, "one"
And "the" is intended to include plural form.
It will be further appreciated that the term that is used in the utility model specification and appended book " and/
Or " refer to one or more of associated item listed any combinations and all possible combinations, and include these groups
It closes.
Referring to Fig. 1, for a kind of schematic block diagram for power supply circuit that the utility model embodiment proposes, which uses
It powers in for 50 (such as PWM chips) of load, as seen from the figure, which includes power supply 10, control circuit 20, controllable switch
30 and regulator circuit 40.Each critical piece is described as follows：
Control circuit 20 is connect with power supply 10 and controllable switch 30 respectively.Control circuit 20 is used for the electricity according to power supply 10
The working condition (controlling controllable switch 30 to be switched on or off) of pressure value control controllable switch 30.Regulator circuit 40 respectively with electricity
50 connection of source 10 and load.Controllable switch 30 is connect with power supply 10 and load 50 respectively.It, can when controllable switch 30 is connected
Switch 30 is controlled by 40 short circuit of regulator circuit, by power supply 10 directly to 50 power supply of load；When controllable switch 30 disconnects, by voltage stabilizing electricity
Road 40 gives load 50 power supply.
The specific work process of control circuit 20 is as follows：It is more than preset first voltage threshold value in the supply voltage of power supply 10
When, control circuit 20 controls controllable switch 30 and disconnects, and provides stable input voltage from regulator circuit 40 to load 50 at this time.It can
See, when the voltage of power supply 10 is larger, it is smaller that the voltage of power supply 10 by regulator circuit 40 can be converted to one by power supply circuit
Input voltage, to reduce load 50 power consumption, reduce load 50 calorific value.
When the supply voltage of the power supply 10 is less than preset second voltage threshold value, control circuit 20 controls controllable switch
30 conductings, controllable switch 30 is by 40 short circuit of regulator circuit at this time, by power supply 10 directly to 50 power supply of load.As it can be seen that in power supply 10
Voltage it is smaller when, power supply circuit by power supply 10 directly to load 50 power supply, to reduce the pressure drop of 10 voltage of power supply, really
Having protected load 50 can work normally.
Technical solution by applying this embodiment, when the voltage of power supply 10 is larger, control circuit 20, which controls, controllably to be opened
It closes 30 to disconnect, the voltage of power supply 10 is converted into a smaller input voltage by regulator circuit 40 at this time, to reduce load
50 power consumption reduces the calorific value of load 50；When the voltage of power supply 10 is smaller, control circuit 20 controls controllable switch 30 and leads
Logical, controllable switch 30 is by 40 short circuit of regulator circuit at this time, by power supply 10 directly to 50 power supply of load, to reduce 10 electricity of power supply
The pressure drop of pressure, it is ensured that load 50 can work normally.As it can be seen that the compatibility for the power supply circuit that the utility model embodiment proposes
Voltage range that is good, being applicable in is wide, and above procedure is participated in without artificial, and easy to operate, user experience is good.
Referring to Fig. 2, in some embodiments, such as the present embodiment, control circuit 20 includes first resistor R1, the first voltage stabilizing
The anode of one end of pipe Z1 and the first capacitance C1, first resistor R1 and power supply 10 is connect, the other end of first resistor R1 and the
The cathode and controllable switch 30 of one voltage-stabiliser tube Z1 connects, and the anode of the first voltage-stabiliser tube Z1 is connect with the cathode of power supply 10.First
Capacitance C1 is connected in parallel with the first voltage-stabiliser tube Z1.
Further, controllable switch 30 is triode Q, or in other embodiments, and controllable switch 30 is metal-oxide-semiconductor
(metal oxide semiconductor, mos field effect transistor).
Controllable switch 30 includes input, output end and control terminal, and the input terminal and power supply 10 of controllable switch 30 are just
Pole connects, and the output end of controllable switch 30 is connect with load 50, and the control terminal of controllable switch 30 is connect with first resistor R1.
It should be noted that the input terminal of triode Q is its collector, the output end of triode Q is its emitter, three poles
The control terminal of pipe Q is its base stage.
The input terminal of metal-oxide-semiconductor drains for it, and the output end of metal-oxide-semiconductor is its source electrode, and the control terminal of metal-oxide-semiconductor is grid.
Further, regulator circuit 40 includes second resistance R2, the second voltage-stabiliser tube Z2 and the second capacitance C2, second resistance
One end of R2 is connect with the anode of power supply 10, and the cathode and load 50 of the other end of second resistance R2 and the second voltage-stabiliser tube Z2 connect
It connects, the anode of the second voltage-stabiliser tube Z2 is connect with the cathode of power supply 10.Second capacitance C2 is connected in parallel with the second voltage-stabiliser tube Z2.
It should be noted that the voltage stabilizing value of the first voltage-stabiliser tube Z1 needs to be less than the voltage stabilizing value of the second voltage-stabiliser tube Z2, such as
In the present embodiment, the voltage stabilizing value of the first voltage-stabiliser tube Z1 is 7.5V, and the voltage stabilizing value of the second voltage-stabiliser tube Z2 is 12V.At this point, in power supply 10
Voltage be more than 12V when, load 50 input voltage be 12V；When the voltage of power supply 10 is less than 7.5V, 50 input electricity is loaded
Pressure is the voltage of power supply 10.
In some embodiments, power supply 10 is accumulator.Load 50 is PWM chip.The voltage of accumulator be 12V or
24V。
Operation principle explanation
Referring to Fig. 2, in embodiment shown in Fig. 2, the voltage stabilizing value of the first voltage-stabiliser tube Z1 is 7.5V, and the second voltage-stabiliser tube Z2's is steady
Pressure value is 12V.When the voltage of power supply 10 is more than 12V, triode Q cut-offs, the second voltage-stabiliser tube Z2 conductings load 50 input electricity
Pressure is 12V.When the voltage of power supply 10 is less than 7.5V, triode Q conductings, power supply 10 directly to 50 power supply of load, loads 50
Input voltage is the voltage of power supply 10.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in some embodiment
Part, may refer to the associated description of other embodiment.
Obviously, those skilled in the art can carry out the utility model various modification and variations without departing from this practicality
Novel spirit and scope.In this way, even these modifications and variations of the present invention belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to include these modifications and variations.
The above is specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
This, any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in various etc.
The modifications or substitutions of effect, these modifications or substitutions should be covered within the scope of the utility model.Therefore, this practicality is new
The protection domain of type should be subject to the protection scope in claims.
Claims (10)
1. a kind of power supply circuit, which is characterized in that for be load supplying, the power supply circuit include power supply, control circuit, can
Control switch and regulator circuit；The control circuit is connect with the power supply and the controllable switch respectively；It is described controllably to open
It closes and is connected respectively with the power supply and the load；The regulator circuit is connected with the power supply and the load respectively；
Wherein：
When the supply voltage of the power supply is more than preset first voltage threshold value, the control circuit controls the controllable switch
It disconnects, to provide stable input voltage from the regulator circuit to the load；It is less than in the supply voltage of the power supply pre-
If second voltage threshold value when, the control circuit controls the controllable switch conducting, with by the power supply directly to described negative
Carry power supply.
2. power supply circuit according to claim 1, which is characterized in that the control circuit includes first resistor and first
Voltage-stabiliser tube, one end of the first resistor are connect with the anode of the power supply, the other end of the first resistor and described first
The cathode of voltage-stabiliser tube and controllable switch connection, the anode of first voltage-stabiliser tube are connect with the cathode of the power supply.
3. power supply circuit according to claim 2, which is characterized in that the controllable switch include input, output end with
And control terminal, the input terminal of the controllable switch and the anode of power supply connect, the output end of the controllable switch and the load
Connection, the control terminal of the controllable switch are connect with the first resistor.
4. power supply circuit according to claim 1, which is characterized in that the regulator circuit includes second resistance and second
Voltage-stabiliser tube, one end of the second resistance are connect with the anode of the power supply, the other end of the second resistance and described second
The cathode of voltage-stabiliser tube and load connection, the anode of second voltage-stabiliser tube are connect with the cathode of the power supply.
5. power supply circuit according to claim 2, which is characterized in that the control circuit further includes the first capacitance, described
First capacitance is connected in parallel with first voltage-stabiliser tube.
6. power supply circuit according to claim 4, which is characterized in that the regulator circuit further includes the second capacitance, described
Second capacitance is connected in parallel with second voltage-stabiliser tube.
7. according to any power supply circuits of claim 1-6, which is characterized in that the controllable switch is triode.
8. power supply circuit according to claim 1, which is characterized in that the controllable switch is metal-oxide-semiconductor.
9. power supply circuit according to claim 7, which is characterized in that the load is PWM chip.
10. power supply circuit according to claim 7, which is characterized in that the power supply is accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820222374.1U CN207853533U (en) | 2018-02-08 | 2018-02-08 | A kind of power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820222374.1U CN207853533U (en) | 2018-02-08 | 2018-02-08 | A kind of power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207853533U true CN207853533U (en) | 2018-09-11 |
Family
ID=63412146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820222374.1U Active CN207853533U (en) | 2018-02-08 | 2018-02-08 | A kind of power supply circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN207853533U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633378A (en) * | 2018-12-28 | 2019-04-16 | 深圳市英威腾电动汽车驱动技术有限公司 | High voltage power distribution circuit and switch adhesion detection method |
| CN113687683A (en) * | 2021-09-06 | 2021-11-23 | 武汉职业技术学院 | Pre-voltage stabilizing circuit |
-
2018
- 2018-02-08 CN CN201820222374.1U patent/CN207853533U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633378A (en) * | 2018-12-28 | 2019-04-16 | 深圳市英威腾电动汽车驱动技术有限公司 | High voltage power distribution circuit and switch adhesion detection method |
| CN113687683A (en) * | 2021-09-06 | 2021-11-23 | 武汉职业技术学院 | Pre-voltage stabilizing circuit |
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