CN207150798U - Stereo set - Google Patents
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- CN207150798U CN207150798U CN201720506454.5U CN201720506454U CN207150798U CN 207150798 U CN207150798 U CN 207150798U CN 201720506454 U CN201720506454 U CN 201720506454U CN 207150798 U CN207150798 U CN 207150798U
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Abstract
The utility model discloses a kind of stereo set, including adapter, isolation circuit, battery, first switch circuit, control circuit and power amplification circuit, the output end of adapter and the input of isolation circuit connect, the power end interconnection of the output end of isolation circuit, the output end of first switch circuit and power amplification circuit, the input of first switch circuit is connected with battery, and the controlled end of first switch circuit and the control terminal of control circuit connect；Wherein, adapter is used to the alternating current of power network input being converted to direct current and exports the first power supply to power amplification circuit；Control circuit is used to be controlled first switch circuit, so that battery passes through first switch circuit output second source to power amplification circuit；Isolation circuit is inputted to adapter for isolating second source.The utility model technology has the characteristics of cost is low.
Description
Technical field
Stereo set technical field is the utility model is related to, more particularly to a kind of stereo set.
Background technology
Stereo set, generally comprise power module and power amplifier module.Power amplifier module is used for the audio of input
Signal carries out power amplification processing and exported, to promote sound horn；Power module is used to provide work to power amplifier module
Power supply.Wherein, power module includes adapter and battery.
At present, or the stereo set of in the market is individually for power amplifier module power supply using adapter, or using electricity
Pond is individually for power amplifier module power supply so that stereo set needs the higher adapter of peak power, and cost is higher.
Utility model content
Main purpose of the present utility model is to provide a kind of stereo set, it is intended to reduces the peak value of adapter in stereo set
Power, so as to reduce the cost of stereo set.
To achieve the above object, the utility model proposes stereo set include adapter, isolation circuit, battery, first
On-off circuit, control circuit and power amplification circuit, the output end of the adapter are connected with the input of the isolation circuit,
The power end interconnection of the output end of the isolation circuit, the output end of the first switch circuit and the power amplification circuit,
The input of the first switch circuit is connected with the battery, controlled end and the control circuit of the first switch circuit
Control terminal connection；Wherein, the adapter, the alternating current for power network to be inputted are converted to direct current and export the first power supply
To the power amplification circuit；The control circuit, for being controlled to the first switch circuit, so that the battery leads to
The first switch circuit output second source is crossed to the power amplification circuit；The isolation circuit, for isolating described
Two power inputs are to the adapter.
Preferably, the isolation circuit includes the first diode, and the anode of first diode is the isolation circuit
Input, the negative electrode of first diode is the output end of the isolation circuit.
Preferably, the first switch circuit includes the first transistor, second transistor, the first electric capacity, the second electric capacity, the
One resistance, second resistance, 3rd resistor and the 4th resistance, the input of the first transistor, the first of first electric capacity
The interconnection of the first end of end and the first resistor, its connecting node are the input of the first switch circuit, and described first is brilliant
The output end of body pipe is connected with the second end of second electric capacity, and its connecting node is the output end of the first switch circuit,
Second end of first electric capacity, the first end of second electric capacity, the second end of the first resistor and the second resistance
First end interconnection, the second end of the second resistance is connected with the input of the second transistor, the second transistor
Controlled end, the 3rd resistor first end and the 4th resistance first end interconnection, the output of the second transistor
End and the second end of the 3rd resistor are grounded, and the second end of the 4th resistance is the controlled of the first switch circuit
End.
Preferably, the control circuit includes control chip, accessory power supply, the 17th resistance, the 4th diode and button
Switch, the control chip control the control terminal that pin is the control circuit, the chip select pin of the control chip, the described tenth
The anode of second end of seven resistance and the 4th diode interconnects, negative electrode and the key switch of the 4th diode
First end is connected, and the second end ground connection of the key switch, the first end of the 17th resistance is connected with the accessory power supply.
Preferably, the stereo set also includes booster circuit, and the input of the booster circuit is connected with the battery,
The output end of the booster circuit is connected with the input of the first switch circuit, the power end of the booster circuit with it is described
Battery is connected, and the controlled end of the booster circuit is connected with the Enable Pin of the control circuit.
Preferably, it is defeated to include the first inductance, third transistor, the second diode, the 3rd electric capacity and PWM for the booster circuit
Go out unit, the first end of first inductance is the input of the booster circuit, the second end of first inductance, described the
The anode of the input of three transistors and second diode interconnects, negative electrode and the 3rd electric capacity of second diode
Positive pole connection, its connecting node be the booster circuit output end, the output end of the third transistor and the described 3rd
The negative pole of electric capacity is grounded, and the controlled end of the third transistor is connected with the output end of the PWM output units, the PWM
The power end of output unit be the booster circuit power end, the controlled end of the PWM output units for it is described boosting electricity
The controlled end on road.
Preferably, the PWM output units include boost chip, the 5th resistance, the 6th resistance, the 7th resistance, the 8th electricity
Resistance, the 9th resistance, the tenth resistance, the 11st resistance, the 12nd resistance, the 13rd resistance, the 14th resistance, the 20th resistance,
21st resistance, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity, the tenth electric capacity and
13rd electric capacity, the supply pin of the boost chip through the 4th capacity earth, the output pin of the boost chip with it is described
The first end connection of 5th resistance, the second end of the 5th resistance are connected with the first end of the 6th resistance, and it connects section
Put the output end for the PWM output units, the over-current detection pin of the boost chip, the first end of the 7th resistance and institute
State the first end interconnection of the 6th electric capacity, the current detecting pin of the boost chip, the first end of the 8th resistance and described the
The first end interconnection of seven electric capacity, the second end of the 6th resistance, the second end of the 7th resistance, the of the 8th resistance
Two ends, the first end of the 9th resistance, the interconnection of the output end of the first end of the tenth resistance and the third transistor, institute
State the input pin of boost chip, the first end of the 9th electric capacity, the first end of the tenth electric capacity and the 14th resistance
The interconnection of the second end, the first end of the 14th resistance is the power end of the PWM output units, and the boost chip makes
Can pin, the second end of the 20th resistance, the first end of the 21st resistance and the first end of the 13rd electric capacity
Interconnection, the first end of the 20th resistance are the controlled end of the PWM output units, and the synchronous pin of the boost chip is through institute
State the 8th capacity earth, the feedback pin of the boost chip, the second end of the 11st resistance and the 12nd resistance
First end is interconnected, and the first end of the 11st resistance is connected with the positive pole of the 3rd electric capacity, the compensation of the boost chip
Pin is the first grounding leg of the boost chip, the second grounding leg, described through the 13rd resistance and the 5th capacity earth
Second end of the 9th electric capacity, the second end of the tenth electric capacity, the second end of the 21st resistance, the 13rd electric capacity
The second end, the second end of the 6th electric capacity, the second end of the 7th electric capacity, the second end, described of the 9th resistance
Second end of the tenth resistance and the second end of the 12nd resistance are grounded.
Preferably, the stereo set also includes reduction voltage circuit, and the first input end of the reduction voltage circuit is adapted to described
Device is connected, and the second input of the reduction voltage circuit is connected with the battery, and the output end of the reduction voltage circuit, which is used to export, is
System power supply.
Preferably, the stereo set also includes second switch circuit, the input of the second switch circuit with it is described
Battery is connected, and the controlled end of the second switch circuit is connected with the switch terminal of the control circuit, the second switch circuit
Output end, the booster circuit power end and the reduction voltage circuit the second input interconnection.
Preferably, the second switch circuit includes the 4th transistor, the 15th resistance, the 16th resistance, the 11st electricity
Hold, the 12nd electric capacity and the 3rd diode, the first end of the 15th resistance, the first end of the 11st electric capacity and described
The input interconnection of 4th transistor, its connecting node are the input of the second switch circuit, the 4th transistor
Output end be the second switch circuit output end, the second end of the 15th resistance, the second of the 11st electric capacity
The interconnection of the first end of end and the 16th resistance, the second end of the 16th resistance, the first end of the 12nd electric capacity
And the anode interconnection of the 3rd diode, the minus earth of the 3rd diode.
The exchange that power network inputs is converted to direct current by using adapter and exports the by technical solutions of the utility model
One power supply is controlled to power amplification circuit control circuit to first switch circuit, so that battery is defeated by first switch circuit
Go out second source to power amplification circuit, realize in the stereo set course of work, adapter and battery are simultaneously power amplification
Circuit is powered.Compared with the existing technical scheme individually powered using adapter, the peak value of the technical program adapter output
Power is smaller, and cost is relatively low.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.
Fig. 1 is the high-level schematic functional block diagram of the embodiment of the utility model stereo set one；
Fig. 2 is the high-level schematic functional block diagram of another embodiment of the utility model stereo set；
Fig. 3 is the electrical block diagram of the another embodiment of the utility model stereo set.
Drawing reference numeral explanation：
Realization, functional characteristics and the advantage of the utility model purpose will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only part of the embodiment of the present utility model, rather than all
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belong to the scope of the utility model protection.
It is to be appreciated that the description for being related to " first ", " second " etc. in the utility model is only used for describing purpose, and can not
It is interpreted as indicating or implies its relative importance or imply the quantity of the technical characteristic indicated by indicating.Thus, define " the
One ", at least one this feature can be expressed or be implicitly included to the feature of " second ".In addition, the skill between each embodiment
Art scheme can be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, when technical scheme
With reference to occurring conflicting or will be understood that the combination of this technical scheme is not present when can not realize, also not in the utility model
It is required that protection domain within.
The utility model proposes a kind of stereo set, the stereo set can be used for playing audio signal, such as, TV
Machine, audio amplifier, etc..
Referring to Fig. 1, in one embodiment, above-mentioned stereo set includes adapter 10, isolation circuit 20, battery 40, the
One on-off circuit 50, control circuit 60 and power amplification circuit 30, the output end of adapter 10 and the input of isolation circuit 20
Connection, the power end interconnection of the output end of isolation circuit 20, the output end of first switch circuit 50 and power amplification circuit 30, the
The input of one on-off circuit 50 is connected with battery 40, and the controlled end of first switch circuit 50 connects with the control terminal of control circuit 60
Connect.
Wherein, adapter 10 is used to the alternating current of power network input is converted into direct current and exports the first power supply to power to put
Big circuit 30.Control circuit 60 is used to be controlled first switch circuit 50, so that battery 40 passes through first switch circuit 50
Second source is exported to power amplification circuit 30.Isolation circuit 20 is inputted to adapter 10 for isolating second source.
Specifically, in the playback equipment course of work, control circuit 60 control the input of first switch circuit 50 with it is defeated
Go out end connection, so that the power supply of battery 40 is exported to power amplification circuit 30 by first switch circuit 50.At the same time, adapter
The alternating current of power network input is converted into direct current by 10, and by the direct current electricity output to power amplification circuit 30.
Because in this stereo set course of work, adapter 10 and battery 40 are powered for power amplification circuit 30 simultaneously.
Therefore, compared with the existing technical scheme individually powered using adapter 10, the peak value of the output of the technical program adapter 10
Power is smaller, and cost is relatively low.
It should be noted that in the present embodiment, battery 40 is chosen as rechargeable battery 40 or non-rechargeable battery 40.Work as electricity
When pond 40 is rechargeable battery 40, stereo set may also include charging circuit 70.Specifically, referring to Fig. 2, the charging circuit 70
Input is connected with adapter 10, and the output end of the charging circuit 70 is connected with battery 40.In this way, battery 40 is reusable,
And in charging without departing from stereo set, environment friendly convenient.
Referring to Fig. 3, optional, the anode that isolation circuit 20 includes the first diode D1, the first diode D1 is isolation
The input of circuit 20, the first diode D1 negative electrode are the output end of isolation circuit 20.Here, the first diode D1 is because having
One-way conduction characteristic and can prevent above-mentioned second source from being exported by adapter 10.
Optionally, first switch circuit 50 includes the first transistor Q1, second transistor Q2, the first electric capacity C1, the second electricity
Hold C2, first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4, the first transistor Q1 input, the first electricity
Hold C1 first end and first resistor R1 first end interconnection, its connecting node be first switch circuit 50 input, first
Transistor Q1 output end is connected with the second electric capacity C2 the second end, and its connecting node is the output end of first switch circuit 50,
First electric capacity C1 the second end, the second electric capacity C2 first end, first resistor R1 the second end and second resistance R2 first end
Interconnection, second resistance R2 the second end are connected with second transistor Q2 input, second transistor Q2 controlled end, the 3rd electricity
Hinder R3 first end and the 4th resistance R4 first end interconnection, second transistor Q2 output end and 3rd resistor R3 the second end
It is grounded, the 4th resistance R4 the second end is the controlled end of first switch circuit 50.
Here, the first transistor Q1 is chosen as P-MOS pipes, and the grid of the P-MOS pipes is the controlled of the first transistor Q1
End, the source electrode of the P-MOS pipes are the first transistor Q1 input, and the drain electrode of the P-MOS pipes is the first transistor Q1 output
End.Second transistor Q2 is chosen as NPN type triode, and the base stage of the NPN type triode is second transistor Q2 controlled end,
The current collection of the NPN type triode extremely second transistor Q2 input, the transmitting extremely second transistor of the NPN type triode
Q2 output end.
Specifically, when the controlled end of first switch circuit 50 receives high level signal, second transistor Q2 conductings, the
One transistor Q1 turns on because obtaining sourcing current, and the input of first switch circuit 50 connects with output end.When first switch electricity
When the controlled end on road 50 receives low level signal, second transistor Q2 cut-offs, the first transistor Q1 cut-offs, first switch circuit
50 input does not connect with output end.
Optionally, control circuit 60 includes control chip U2, accessory power supply VDD, the 17th resistance R17, the 4th diode
D4 and key switch K, control chip U2 control pin CTR be control circuit 60 control terminal, control chip U2 chip select pin V,
17th resistance R17 the second end and the 4th diode D4 anode interconnection, the 4th diode D4 negative electrode is with key switch K's
First end is connected, and key switch K the second end ground connection, the 17th resistance R17 first end is connected with accessory power supply VDD.
Specifically, when key switch K is in closure state, control chip U2 chip select pin V passes through the 4th diode D4
And key switch K ground connection, control chip U2 work.When key switch K is off, control chip U2 chip select pin V
Accessory power supply VDD is connect by the 17th resistance R17, control chip U2 does not work.
Further, stereo set also includes booster circuit 100, and the input of booster circuit 100 is connected with battery 40, rises
The output end of volt circuit 100 is connected with the input of first switch circuit 50, and power end and the battery 40 of booster circuit 100 connect
Connect, the controlled end of booster circuit 100 is connected with the Enable Pin of control circuit 60.Here, booster circuit 100 can make the defeated of battery 40
Exported after going out the boosted processing of power supply, further reduce the peak power that adapter 10 exports, set so as to further reduce sound equipment
Standby cost.Wherein, control chip U2 enabled pin EN is the Enable Pin of control circuit 60.
Optionally, booster circuit 100 includes the first inductance L1, third transistor Q3, the second diode D2, the 3rd electric capacity C3
And PWM output units 110, the first inductance L1 first end are the input of booster circuit 100, the first inductance L1 the second end,
Third transistor Q3 input and the second diode D2 anode interconnect, the second diode D2 negative electrode and the 3rd electric capacity C3's
Positive pole connects, and its connecting node is the output end of booster circuit 100, and third transistor Q3 output end and the 3rd electric capacity C3's is negative
Extremely it is grounded, third transistor Q3 controlled end is connected with the output end of PWM output units 110, the electricity of PWM output units 110
Source is the power end of booster circuit 100, and the controlled end of PWM output units 110 is the controlled end of booster circuit 100.
Here, third transistor Q3 is chosen as N-MOS pipes, and the grid of the N-MOS pipes is the controlled of third transistor Q3
End, the drain electrode of the N-MOS pipes is third transistor Q3 input, and the source electrode of the N-MOS pipes is third transistor Q3 output
End.Wherein, N-MOS pipes are built-in with parasitic diode, and the anode of the parasitic diode is connected with the source electrode of N-MOS pipes, and this is posted
The negative electrode of raw diode is connected with the drain electrode of N-MOS pipes.
Specifically, when PWM output units 110 export high level signal, the first transistor Q1 conductings, battery 40, first
Inductance L1 and the first transistor Q1 forms current loop, the first inductance L1 energy storage, the 3rd electric capacity C3 electric discharges, maintains booster circuit
100 output.When PWM output units 110 export low level signal, the first transistor Q1 cut-offs, battery 40, the first inductance
L1, the second diode D2 and the 3rd electric capacity C3 form current loop, the energy that the first inductance L1 releases store before this, the 3rd electric capacity
C3 charges, and booster circuit 100 externally exports.In whole process, the voltage fallen in the 3rd electric capacity C3 positive poles is inductance induced voltage
With the voltage sum of battery 40, higher than the voltage of battery 40.Also, the dutycycle for the PWM ripples that PWM output units 110 export is bigger, rise
The voltage that volt circuit 100 exports is higher.
Optionally, PWM output units 110 include boost chip U1, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7,
8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 11st resistance R11, the 12nd resistance R12, the 13rd resistance R13,
14th resistance R14, the 20th resistance R20, the 21st resistance R21, the 4th electric capacity C4, the 5th electric capacity C5, the 6th electric capacity C6,
7th electric capacity C7, the 8th electric capacity C8, the 9th electric capacity C9, the tenth electric capacity C10 and the 13rd electric capacity C13, boost chip U1 power supply
Pin VCC is grounded through the 4th electric capacity C4, and boost chip U1 output pin GATE is connected with the 5th resistance R5 first end, the 5th resistance
R5 the second end is connected with the 6th resistance R6 first end, and its connecting node is the output end of PWM output units 110, and boost core
Piece U1 over-current detection pin CS, the 7th resistance R7 first end and the 6th electric capacity C6 first end interconnection, boost chip U1 electricity
Stream detection pin ISEN, the 8th resistance R8 first end and the 7th electric capacity C7 first end interconnection, the 6th resistance R6 the second end, the
Seven resistance R7 the second end, the 8th resistance R8 the second end, the 9th resistance R9 first end, the tenth resistance R10 first end and
Third transistor Q3 output end interconnection, boost chip U1 input pin VIN, the 9th electric capacity C9 first end, the tenth electric capacity C10
First end and the 14th resistance R14 the interconnection of the second end, the 14th resistance R14 first end is the electricity of PWM output units 110
Source, boost chip U1 enabled pin EN, the 20th resistance R20 the second end, the 21st resistance R21 first end and the tenth
Three electric capacity C13 first end interconnection, the 20th resistance R20 first end are the controlled end of PWM output units 110, boost chip
U1 synchronous pin SS is grounded through the 8th electric capacity C8, boost chip U1 feedback pin FB, the 11st resistance R11 the second end and the tenth
Two resistance R12 first end interconnection, the 11st resistance R11 first end are connected with the 3rd electric capacity C3 positive pole, boost chip U1
Compensation pin COMP be grounded through the 13rd resistance R13 and the 5th electric capacity C5, boost chip U1 the first grounding leg SGND, second connect
Lower margin GND, the 9th electric capacity C9 the second end, the tenth electric capacity C10 the second end, the 21st resistance R21 the second end, the 13rd
Electric capacity C13 the second end, the 6th electric capacity C6 the second end, the 7th electric capacity C7 the second end, the 9th resistance R9 the second end, the tenth
Resistance R10 the second end and the 12nd resistance R12 the second end are grounded.
It is noted that this booster circuit 100 is disturbed to work in order to suppress external signal, here, booster circuit 100 is also
Including multiple filter capacitors, respectively the 14th electric capacity C14, the 15th electric capacity C15, the 16th electric capacity C16, the 17th electric capacity
C17, the 18th electric capacity C18 and the 19th electric capacity C19.Specifically, the 14th electric capacity C14 first end, the 15th electric capacity C15
The negative electrode interconnection of first end, the 16th electric capacity C16 first end, the 3rd electric capacity C3 positive pole and the second diode D2, the 14th
Electric capacity C14 the second end, the 15th electric capacity C15 the second end and the 16th electric capacity C16 the second end is grounded.17th electric capacity
C17 first end, the 18th electric capacity C18 first end, the 19th electric capacity C19 positive pole and the first inductance L1 first end are mutual
Even, the 17th electric capacity C17 the second end, the 18th electric capacity C18 the second end and the 19th electric capacity C19 negative pole are grounded.
Further, stereo set also includes reduction voltage circuit 90, and the first input end of reduction voltage circuit 90 is connected with adapter,
Second input of reduction voltage circuit 90 is connected with battery 40, and the output end of reduction voltage circuit 90 is used for output system power supply.
This, system power supply power supply can be used for being other power units power supply in stereo set, strengthen the adaptability of stereo set.
Optionally, reduction voltage circuit 90 includes the 5th diode D5, the 6th diode D6 and converter (figure does not mark), and the 5th
Diode D5 anode is the first input end of reduction voltage circuit 90, and the 6th diode D6 anode is second defeated for reduction voltage circuit 90
Enter end, the input interconnection of the 5th diode D5 negative electrode, the 6th diode D6 negative electrode and converter, the output end of converter
For the output end of reduction voltage circuit 90.Wherein, converter is chosen as BUCK converters, and the topological structure of converter is not limited herein
System.
Further, stereo set also includes second switch circuit 80, input and the battery 40 of second switch circuit 80
Connection, the controlled end of second switch circuit 80 are connected with the switch terminal of control circuit 60, the output end of second switch circuit 80, are risen
The second input interconnection of the power end and reduction voltage circuit 90 of volt circuit 100.Wherein, control chip U2 switching pin SW is control
The switch terminal of circuit 60.
Optionally, second switch circuit 80 includes the 4th transistor Q4, the 15th resistance R15, the 16th resistance R16, the
11 electric capacity C11, the 12nd electric capacity C12 and the 3rd diode D3, the 15th resistance R15 first end, the 11st electric capacity C11
First end and the 4th transistor Q4 input interconnect, its connecting node be second switch circuit 80 input, the 4th crystal
Pipe Q4 output end is the output end of second switch circuit 80, the 15th resistance R15 the second end, the of the 11st electric capacity C11
Two ends and the 16th resistance R16 first end interconnect, the 16th resistance R16 the second end, the 12nd electric capacity C12 first end and
3rd diode D3 anode interconnection, the 3rd diode D3 negative electrode are connected with key switch K first end, key switch K's
Second end is grounded.
Here, the 4th transistor Q4 is chosen as P-MOS pipes, and the grid of the P-MOS pipes is the controlled of the 4th transistor Q4
End, the source electrode of the P-MOS pipes are the 4th transistor Q4 input, and the drain electrode of P-MOS pipes is the 4th transistor Q4 output end.
Here, the 5th transistor Q5 is chosen as NPN type triode, and the base stage of the NPN type triode is the 5th transistor
Q5 controlled end, current collection extremely the 5th transistor Q5 input of the NPN type triode, the emitter stage of the NPN type triode
For the 5th transistor Q5 output end.
Specifically, when the 5th transistor Q5 base stage receives high level signal, the 5th transistor Q5 conductings, the 4th is brilliant
Body pipe Q4 is turned on because obtaining sourcing current, and the power supply of battery 40 can be exported by second switch circuit 80；When the 5th transistor Q5's
When base stage receives low level signal, the 5th transistor Q5 cut-offs, the 4th transistor Q4 cut-offs, the voltage of battery 40 can not be by the
Two on-off circuits 80 export.Wherein, when the 5th transistor Q5 is switched to cut-off state by off-state, the 12nd electric capacity C12
Absorbable spike energy between 5th transistor Q5 inputs and output end, the 3rd diode D3 can be to being applied to the 12nd electricity
The voltage for holding C12 both ends carries out clamper, with protection circuit.
Hereinafter, with reference to Fig. 1 to Fig. 3, the operation principle of the utility model stereo set is illustrated：
When key switch K is off：Only adapter 10 is that power amplification circuit 30 is powered.
When button is in closure state：
On the one hand, control chip U2 chip select pin V is grounded by the 4th diode D4, control chip U2 work, and at it
Pin CTR output control signals are controlled, so that the input of first switch circuit 50 connects with output end；Pin EN outputs are enabled at it
Enable signal, so that boost chip U1 is to be launched.
At the same time, the 4th transistor Q4 is turned on, and the power supply of battery 40 is exported to PWM by second switch circuit 80 and exports list
Boost chip U1 in 110, PWM of member output units 110 starts because obtaining power supply, and booster circuit 100 is defeated by battery 40
Go out power supply and carry out boosting processing, and exported by first switch circuit 50 to power amplification circuit 30.
On the other hand, adapter 10 is that power amplification circuit 30 is powered by isolation circuit 20.
Finally, stereo set steady operation.
Preferred embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model,
Every equivalent structure change under inventive concept of the present utility model, made using the utility model specification and accompanying drawing content
Change, or directly/be used in other related technical areas indirectly and be included in scope of patent protection of the present utility model.
Claims (10)
1. a kind of stereo set, it is characterised in that including adapter, isolation circuit, battery, first switch circuit, control circuit
And power amplification circuit, the output end of the adapter are connected with the input of the isolation circuit, the isolation circuit it is defeated
Go out the power end interconnection of end, the output end of the first switch circuit and the power amplification circuit, the first switch circuit
Input be connected with the battery, the controlled end of the first switch circuit is connected with the control terminal of the control circuit；Its
In,
The adapter, the alternating current for power network to be inputted are converted to direct current and export the first power supply to the power amplification
Circuit；
The control circuit, for being controlled to the first switch circuit, so that the battery passes through the first switch
Circuit output second source is to the power amplification circuit；
The isolation circuit, inputted for isolating the second source to the adapter.
2. stereo set as claimed in claim 1, it is characterised in that the isolation circuit includes the first diode, and described
The anode of one diode is the input of the isolation circuit, and the negative electrode of first diode is the output of the isolation circuit
End.
3. stereo set as claimed in claim 1, it is characterised in that the first switch circuit includes the first transistor, the
Two-transistor, the first electric capacity, the second electric capacity, first resistor, second resistance, 3rd resistor and the 4th resistance, the first crystal
The first end interconnection of the input of pipe, the first end of first electric capacity and the first resistor, its connecting node are described the
The input of one on-off circuit, the output end of the first transistor are connected with the second end of second electric capacity, and it connects section
Point is the output end of the first switch circuit, the second end of first electric capacity, the first end of second electric capacity, described the
Second end of one resistance and the first end interconnection of the second resistance, the second end and the second transistor of the second resistance
Input connection, the controlled end of the second transistor, the first of the first end of the 3rd resistor and the 4th resistance
Second end of end interconnection, the output end of the second transistor and the 3rd resistor is grounded, and the second of the 4th resistance
Hold as the controlled end of the first switch circuit.
4. stereo set as claimed in claim 1, it is characterised in that the control circuit include control chip, accessory power supply,
17th resistance, the 4th diode and key switch, the control chip control the control terminal that pin is the control circuit, institute
The anode for stating the chip select pin of control chip, the second end of the 17th resistance and the 4th diode interconnects, and the described 4th
The negative electrode of diode is connected with the first end of the key switch, the second end ground connection of the key switch, the 17th electricity
The first end of resistance is connected with the accessory power supply.
5. stereo set as claimed in claim 1, it is characterised in that the stereo set also includes booster circuit, the liter
The input of volt circuit is connected with the battery, and the output end of the booster circuit and the input of the first switch circuit connect
Connect, the power end of the booster circuit is connected with the battery, and the controlled end of the booster circuit makes with the control circuit
Can end connection.
6. stereo set as claimed in claim 5, it is characterised in that the booster circuit includes the first inductance, the 3rd crystal
Pipe, the second diode, the 3rd electric capacity and PWM output units, the first end of first inductance are the input of the booster circuit
End, the anode interconnection at the second end of first inductance, the input of the third transistor and second diode are described
The negative electrode of second diode is connected with the positive pole of the 3rd electric capacity, its connecting node be the booster circuit output end, institute
State the output end of third transistor and the negative pole of the 3rd electric capacity be grounded, the controlled end of the third transistor with it is described
The output end connection of PWM output units, the power ends of the PWM output units are the power end of the booster circuit, the PWM
The controlled end for the booster circuit of the controlled end of output unit.
7. stereo set as claimed in claim 6, it is characterised in that the PWM output units include boost chip, the 5th electricity
Resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11st resistance, the 12nd resistance, the 13rd
Resistance, the 14th resistance, the 20th resistance, the 21st resistance, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity,
8th electric capacity, the 9th electric capacity, the tenth electric capacity and the 13rd electric capacity,
The supply pin of the boost chip is through the 4th capacity earth, the output pin of the boost chip and the 5th resistance
First end connection, the second end of the 5th resistance is connected with the first end of the 6th resistance, and its connecting node is described
The output end of PWM output units, the over-current detection pin of the boost chip, the first end of the 7th resistance and the 6th electricity
The first end interconnection of appearance, the current detecting pin of the boost chip, the first end of the 8th resistance and the 7th electric capacity
First end interconnects, the second end of the 6th resistance, the second end of the 7th resistance, the second end of the 8th resistance, institute
State the output end interconnection of the first end of the 9th resistance, the first end of the tenth resistance and the third transistor, the boosting
The input pin of chip, the first end of the 9th electric capacity, the second of the first end of the tenth electric capacity and the 14th resistance
End interconnection, the first end of the 14th resistance are the power end of the PWM output units, the enabled pin of the boost chip,
The first end interconnection at the second end of the 20th resistance, the first end of the 21st resistance and the 13rd electric capacity,
The first end of 20th resistance is the controlled end of the PWM output units, and the synchronous pin of the boost chip is through described the
Eight capacity earths, feed back pin, the second end of the 11st resistance and the 12nd resistance the first of the boost chip
End interconnection, the first end of the 11st resistance are connected with the positive pole of the 3rd electric capacity, the compensation pin warp of the boost chip
13rd resistance and the 5th capacity earth, the first grounding leg of the boost chip, the second grounding leg, the described 9th
Second end of electric capacity, the second end of the tenth electric capacity, the second end of the 21st resistance, the of the 13rd electric capacity
Two ends, the second end of the 6th electric capacity, the second end of the 7th electric capacity, the second end of the 9th resistance, the described tenth
Second end of resistance and the second end of the 12nd resistance are grounded.
8. stereo set as claimed in claim 1, it is characterised in that the stereo set also includes reduction voltage circuit, the drop
The first input end of volt circuit is connected with the adapter, and the second input of the reduction voltage circuit is connected with the battery, institute
The output end for stating reduction voltage circuit is used for output system power supply.
9. the stereo set as described in claim 5-7 any one, it is characterised in that the stereo set also includes decompression electricity
Road, the first input end of the reduction voltage circuit are connected with the adapter, the second input and the electricity of the reduction voltage circuit
Pond connects, and the output end of the reduction voltage circuit is used for output system power supply；
The stereo set also includes second switch circuit, and the input of the second switch circuit is connected with the battery, institute
The controlled end for stating second switch circuit is connected with the switch terminal of the control circuit, the output end of the second switch circuit, institute
State the second input interconnection of the power end and the reduction voltage circuit of booster circuit.
10. stereo set as claimed in claim 9, it is characterised in that the second switch circuit includes the 4th transistor, the
15 resistance, the 16th resistance, the 11st electric capacity, the 12nd electric capacity and the 3rd diode, the first end of the 15th resistance,
The first end of 11st electric capacity and the input interconnection of the 4th transistor, its connecting node are second switch electricity
The input on road, the output end of the 4th transistor are the output end of the second switch circuit, the 15th resistance
The first end interconnection at the second end, the second end of the 11st electric capacity and the 16th resistance, the of the 16th resistance
The anode interconnection at two ends, the first end of the 12nd electric capacity and the 3rd diode, the negative electrode of the 3rd diode connect
Ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720506454.5U CN207150798U (en) | 2017-05-08 | 2017-05-08 | Stereo set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720506454.5U CN207150798U (en) | 2017-05-08 | 2017-05-08 | Stereo set |
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| Publication Number | Publication Date |
|---|---|
| CN207150798U true CN207150798U (en) | 2018-03-27 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720506454.5U Expired - Fee Related CN207150798U (en) | 2017-05-08 | 2017-05-08 | Stereo set |
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| Country | Link |
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| CN (1) | CN207150798U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109286873A (en) * | 2018-11-13 | 2019-01-29 | 合肥工业大学 | A kind of plasma sound equipment |
| CN110602770A (en) * | 2019-08-22 | 2019-12-20 | 维沃移动通信有限公司 | Power supply management circuit, terminal equipment and power supply management method |
| CN110907711A (en) * | 2019-11-20 | 2020-03-24 | 武汉鸿志高测电气技术有限公司 | Nuclear phase and phasing device and method |
| CN111725857A (en) * | 2019-03-21 | 2020-09-29 | 东莞新能安科技有限公司 | Switch drive circuit and battery control circuit |
-
2017
- 2017-05-08 CN CN201720506454.5U patent/CN207150798U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109286873A (en) * | 2018-11-13 | 2019-01-29 | 合肥工业大学 | A kind of plasma sound equipment |
| CN111725857A (en) * | 2019-03-21 | 2020-09-29 | 东莞新能安科技有限公司 | Switch drive circuit and battery control circuit |
| CN111725857B (en) * | 2019-03-21 | 2022-02-15 | 东莞新能安科技有限公司 | Switch drive circuit and battery control circuit |
| US11996723B2 (en) | 2019-03-21 | 2024-05-28 | Dongguan Nvt Technology Limited | Driving circuit for switch and battery control circuit using the same |
| CN110602770A (en) * | 2019-08-22 | 2019-12-20 | 维沃移动通信有限公司 | Power supply management circuit, terminal equipment and power supply management method |
| CN110907711A (en) * | 2019-11-20 | 2020-03-24 | 武汉鸿志高测电气技术有限公司 | Nuclear phase and phasing device and method |
| CN110907711B (en) * | 2019-11-20 | 2022-08-12 | 武汉鸿志高测电气技术有限公司 | Nuclear phase and phasing device and method |
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Granted publication date: 20180327 Termination date: 20210508 |