CN208210264U - Duplicate supply formula Bluetooth audio device power supply device - Google Patents

Duplicate supply formula Bluetooth audio device power supply device Download PDF

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Publication number
CN208210264U
CN208210264U CN201820824107.1U CN201820824107U CN208210264U CN 208210264 U CN208210264 U CN 208210264U CN 201820824107 U CN201820824107 U CN 201820824107U CN 208210264 U CN208210264 U CN 208210264U
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resistance
voltage
power supply
output end
triode
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蒋春华
张玮
黄小哲
赖文利
李冬冬
刘卫平
苟建波
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Chongqing Hua Weixu Electronics Co Ltd
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Chongqing Hua Weixu Electronics Co Ltd
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Abstract

A kind of duplicate supply formula Bluetooth audio device power supply device provided by the utility model, including input unit, input terminal are electrically connected by attaching plug with city;Voltage transformation module, the connection of the output end of its input terminal and input unit, switch module is set between the firewire of attaching plug and input unit, isolation detection module, its input terminal is connected to the output end of input unit, the connection of the input terminal of second output terminal and voltage transformation module, switch control module, it is disconnected for receiving the voltage detection signal of isolation detection module output and controlling switch module when the output voltage of input unit is greater than the set value, the charging and discharging lithium battery manages circuit, it is connect with lithium battery, its charging input end is connected to the first output end of isolation detection module, the power input of its output end connection cell switch control circuit of powering;Cell switch control circuit, its control signal is connected to the first output end of isolation detection module, its output end of powering is connected to the external power supply end Vm of isolation detection module, can be realized it is multiple between alternating current and stereo set power supply is isolated, so that it is guaranteed that the electrical safety of stereo set.

Description

Duplicate supply formula Bluetooth audio device power supply device
Technical field
The utility model relates to a kind of field of audio more particularly to a kind of duplicate supply formula Bluetooth audio device power supply devices.
Background technique
Sound equipment is increasingly liked by the life & amusement of modern as a kind of audio-visual devices;And with the hair of technology Exhibition, there has been proposed wireless acoustics, that is to say, that the side of traditional wired connection is no longer bound between sound equipment and audiogenic device Formula, can be by existing wireless transport module, for example uses the transmission of bluetooth module realization audio data;Existing bluetooth sound It rings in use, on the one hand power supply will be powered for bluetooth module, to be on the other hand powered for loudspeaker, although existing Some equipment is powered using various power supply adaptors, but there are the following problems: existing power supply device exists The insufficient situation of stability, although there are many Switching Power Supplies at present, circuit structure is complicated, higher cost, still, if not Using Switching Power Supply, then stability cannot reach requirement;Secondly, will appear fever phenomenon during power work, it is existing In technology, user generallys use hand to contact perception and judge current temperature status, and this mode can only find that power supply scalds one's hand, but Which type of it is unable under accurate judgement Current Temperatures that influence generated on power supply and power supply unit, so that power source life contracts Short, moreover, user is known with feel, there is also security risks;Again, existing Bluetooth audio device is during the work time only with exchange It is powered after electric rectification, after mains failure, Bluetooth audio device cannot then work completely, to influence the use of user, especially It is in important meeting occasion.
Therefore, in order to solve the above-mentioned technical problem, continue to propose a kind of new Bluetooth audio device power supply device.
Utility model content
In view of this, can be realized the purpose of the utility model is to provide a kind of duplicate supply formula Bluetooth audio device power supply device It is multiple between alternating current and stereo set that power supply is isolated, so that it is guaranteed that the electrical safety of stereo set, and can be realized self-test The effect of survey, the automatically cutting off power source in the state that voltage fluctuation is larger work as city to realize the protection to power supply itself circuit When electricity powers off for some reason, spare lithium battery can be automatically switched to and be powered, after the power supply of city power recovery, can automatically switched To mains-supplied state, so as to guarantee that Bluetooth audio device being capable of continuous service;Moreover, can be carried out to the operating temperature of itself Detection, and alarming when the temperature is excessively high, to be conducive to that user is helped to be made whether power-off judgement, and structure is simple, system It makes conveniently, stability is high, low in cost.
A kind of duplicate supply formula Bluetooth audio device power supply device provided by the utility model, including input unit, voltage transformation list Member, power supply protection unit, temperature alarming unit, lithium battery, charging and discharging lithium battery manage circuit and supply for controlling lithium battery The cell switch control circuit of electricity;
Input unit, input terminal is electrically connected by attaching plug with city, for 220V alternating current to be converted to direct current simultaneously It exports to voltage transformation module;
The output end of voltage transformation module, input terminal and input unit connects, the direct current for exporting input unit Electricity is converted to 12V and 5V direct current supply Bluetooth audio device equipment;
Power supply protection unit includes switch module, isolation detection module and switch control module:
The switch module is set between the firewire of attaching plug and input unit, for controlling attaching plug and input The on-off of supply access between unit;
The isolation detection module, input terminal are connected to the output end of input unit, second output terminal and voltage transformation The input terminal of unit connects, and the direct current for exporting input unit, which is electrically isolated, to be exported to voltage transformation module, and for detecting The output voltage and voltage sense signal of input unit;
The switch control module, for receiving the voltage detection signal of isolation detection module output and working as input unit Output voltage when being greater than the set value control switch module disconnect;
The temperature alarming unit, for detect entire power supply device work when temperature and temperature be more than setting value when Alarm;
The charging and discharging lithium battery manages circuit, connect with lithium battery, is managed for the charge and discharge to lithium battery, Its charging input end is connected to the first output end of isolation detection module, power supply output end connection cell switch control circuit Power input;
The cell switch control circuit, control signal are connected to the first output end of isolation detection module, supply Electricity output end is connected to the external power supply end Vm of isolation detection module, the confession powered for controlling lithium battery to voltage transformation module Electric pathway.
Further, the input unit includes isolating transformer T1, two-way Transient Suppression Diode TVS1 and rectified current Road REC;
The both ends of the armature winding of the isolating transformer T1 are connect with the firewire of attaching plug and zero curve contact respectively, every The both ends of secondary windings from transformer T1 are connected to the positive input terminal and negative input end of rectification circuit REC, the rectification The positive output end of circuit REC is connect with the input terminal of isolation detection module, the negative output terminal ground connection of rectification circuit REC;Two-way wink The both ends of state inhibition diode TVS1 are connected to the both ends of the secondary windings of isolating transformer T1.
Further, the isolation detection module includes resistance R1, resistance R2, resistance R3, resistance R4, capacitor C1, voltage-stabiliser tube DW1, inductance L1, diode D2 and amplifier U1, wherein resistance R1 is varistor;
One end of resistance R2 is connected to the positive output end of rectification circuit REC, the same phase of the other end and amplifier U1 of resistance R2 End connection, the output end of amplifier U2 connect with the backward end of amplifier U1 and are formed voltage follower, the output end of amplifier U1 and two The anode connection of pole pipe D2, the cathode of diode D2 are connect with the cathode of voltage-stabiliser tube DW1, the plus earth of voltage-stabiliser tube DW1;Two poles The cathode of pipe D2 is also connect with one end of inductance L1, and the other end of inductance L1 is connected as the second output terminal of isolation detection module In the input terminal of voltage transformation module, the output end of amplifier U1 is the first output end that output module is isolated, and diode D2's is negative Points of common connection between pole and inductance L1 is as external power supply end Vm;
Points of common connection between resistance R2 and the positive output end of rectification circuit REC is grounded by resistance R1, resistance R2 and Points of common connection between the in-phase end of amplifier U1 is grounded by capacitor C1, and one end of resistance R3 is connected to the same phase of amplifier U1 End, the other end of resistance R3 are grounded by resistance R4, and the points of common connection of resistance R3 and resistance R4 are as isolation detection module Voltage detection signal output end is connected to the control signal of switch control module.
Further, the switch module includes the normal open switch K1 and delay-action push-button switch S1 of relay, the relay The normal open switch K1 and delay-action push-button switch S1 of device J1 is in parallel, and the closure of the normal open switch K1 of the relay J1 is with disconnection by opening Close control module control.
Further, the switch control module include resistance R6, resistance R5, adjustable resistance RW1, comparator U3, resistance R7, Triode Q1 and resistance R8;
One end of the resistance R6 is connected to the points of common connection of resistance R3 and resistance R4 as input terminal, and resistance R6's is another One end is connect with the in-phase end of comparator U3, and the backward end of comparator U3 is followed by 5V by resistance R5 and adjustable resistance RW1 series connection DC power supply;
The output end of comparator U3 is connect by resistance R7 with the base stage of triode Q1, the collector and 12V of triode Q1 Direct current electrical connection, the emitter of triode Q1 are connect with one end of resistance R8, the other end the encouraging by relay J1 of resistance R8 Magnetic coil ground connection.
Further, the cell switch control circuit includes resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, triode Q3, triode Q4, voltage-stabiliser tube DW5, voltage-stabiliser tube DW6 and diode D3;
One end of resistance R13 is connected to the output end of amplifier U1 as the control signal of cell switch control circuit, electricity The other end of resistance R13 is grounded by resistance R14, and the points of common connection between resistance R13 and resistance R14 is connected to triode Q3's The base stage of base stage, triode Q3 is connect with the cathode of voltage-stabiliser tube DW5, the plus earth of voltage-stabiliser tube DW5, the emitter of triode Q3 Ground connection;
One end of resistance R16 is connected to charging and discharging lithium battery management electricity as the power input of cell switch control circuit The other end of the power supply output end on road, resistance R16 is connect with the emitter of triode Q4, the collector and diode of triode Q4 The anode connection of D3, the cathode of diode D3 are connected to external power supply end Vm as the output end of cell switch control circuit, electricity One end of resistance R15 is connected to the points of common connection between resistance R16 and the power supply output end of charging and discharging lithium battery management circuit, electricity The other end of resistance R15 is connected to the base stage of triode Q4, the points of common connection between resistance R15 and resistance R17 by resistance R17 It is connected to the collector of triode Q3, wherein triode Q4 is PNP type triode.
Further, the temperature alarming unit includes thermistor R9, resistance R10, resistance R11, resistance R12, adjustable electric Hinder RW2, adjustable resistance RW3, comparator U4, buzzer SP and indicator light LED;
One end of the thermistor R9 is connect with 5V DC power supply, and the other end of thermistor R9 passes through adjustable resistance RW2 ground connection, the points of common connection between thermistor R9 and adjustable resistance RW2 pass through the in-phase end of resistance R11 and comparator U4 Connection, the backward end of comparator U4 after resistance R12 and adjustable resistance RW3 series connection by being grounded, the output end of comparator U4 and three The base stage of pole pipe Q2 connects, and the collector of triode Q2 is connect by resistance R10 with 5V DC power supply, the emitter of triode Q2 It is connect with the anode of buzzer SP, the cathode ground connection of buzzer SP, the emitter of triode Q2 and the anode of indicator light LED connect It connects, the cathode ground connection of indicator light LED.
Further, the voltage transformation module includes first voltage translation circuit and second voltage translation circuit;
The input terminal of the first voltage translation circuit is connect with the output end of isolation detection module, first voltage transformation electricity The output end output 12V DC electricity on road;The output of the input terminal and first voltage translation circuit of the second voltage translation circuit The output end of end connection, the second voltage translation circuit exports 5V direct current;
Wherein, first voltage translation circuit is LM7812 chip;Second voltage translation circuit is LM7805 chip.
The utility model has the beneficial effects that by the utility model, can be realized between alternating current and stereo set it is multiple every From power supply, so that it is guaranteed that the electrical safety of stereo set, and can be realized the effect of self-test, when voltage fluctuation is biggish Automatically cutting off power source under state, to realize that the protection to power supply itself circuit can automatically switch when alternating current powers off for some reason It is powered to spare lithium battery, after the power supply of city power recovery, mains-supplied state can be automatically switched to, so as to protect Demonstrate,proving Bluetooth audio device being capable of continuous service;Moreover, can be detected to the operating temperature of itself, and reported when the temperature is excessively high Alert, to be conducive to that user is helped to be made whether power-off judgement, and structure is simple, easily manufactured, stability is high, low in cost.
Detailed description of the invention
The utility model is further described with reference to the accompanying drawings and examples:
Fig. 1 is the structural principle block diagram of the utility model.
Fig. 2 is the circuit diagram of the utility model.
Fig. 3 is the circuit diagram of the temperature alarming unit of the utility model.
Fig. 4 is the cell switch control circuit schematic diagram of the utility model.
Specific embodiment
Further description is made to the utility model below in conjunction with Figure of description:
A kind of duplicate supply formula Bluetooth audio device power supply device provided by the utility model, including input unit, voltage transformation list Member, power supply protection unit, temperature alarming unit, lithium battery, charging and discharging lithium battery manage circuit and supply for controlling lithium battery The cell switch control circuit of electricity;
Input unit, input terminal is electrically connected by attaching plug with city, for 220V alternating current to be converted to direct current simultaneously It exports to voltage transformation module;
The output end of voltage transformation module, input terminal and input unit connects, the direct current for exporting input unit Electricity is converted to 12V and 5V direct current supply Bluetooth audio device equipment;
Power supply protection unit includes switch module, isolation detection module and switch control module:
The switch module is set between the firewire of attaching plug and input unit, for controlling attaching plug and input The on-off of supply access between unit;
The isolation detection module, input terminal are connected to the output end of input unit, second output terminal and voltage transformation The input terminal of unit connects, and the direct current for exporting input unit, which is electrically isolated, to be exported to voltage transformation module, and for detecting The output voltage and voltage sense signal of input unit;
The switch control module, for receiving the voltage detection signal of isolation detection module output and working as input unit Output voltage when being greater than the set value control switch module disconnect;
The temperature alarming unit, for detect entire power supply device work when temperature and temperature be more than setting value when Alarm;
The charging and discharging lithium battery manages circuit, connect with lithium battery, is managed for the charge and discharge to lithium battery, Its charging input end is connected to the first output end of isolation detection module, power supply output end connection cell switch control circuit Power input;Wherein, charging and discharging lithium battery management circuit is for supervising the voltage, electric current and remaining capacity of lithium battery It surveys, charges when not enough power supply, and stop power supply output end power supply, otherwise, lithium electricity when the not enough power supply of lithium battery The power supply output end in pond is always maintained at power supply state;Stop charging when electricity is enough, charging and discharging lithium battery manages circuit using existing Some circuits can generally be equipped with corresponding charging and discharging lithium battery management circuit when lithium battery dispatches from the factory, be also used to lithium battery mistake It fills, over-discharge, over-voltage, overcurrent and under-voltage protection, belongs to the prior art, not in this to go forth;
The cell switch control circuit, control signal are connected to the first output end of isolation detection module, supply Electricity output end is connected to the external power supply end Vm of isolation detection module, the confession powered for controlling lithium battery to voltage transformation module Electric pathway;Can be realized it is multiple between alternating current and stereo set power supply is isolated, so that it is guaranteed that the electrical safety of stereo set, and And can be realized the effect of self-test, the automatically cutting off power source in the state that voltage fluctuation is larger, to realize to power supply itself The protection of circuit can automatically switch to spare lithium battery and be powered when alternating current powers off for some reason, when city power recovery powers Afterwards, mains-supplied state can be automatically switched to, so as to guarantee that Bluetooth audio device being capable of continuous service;Moreover, can be to certainly The operating temperature of body is detected, and is being alarmed when the temperature is excessively high, thus be conducive to that user is helped to be made whether power-off judgement, And structure is simple, and easily manufactured, stability is high, low in cost.
In the present embodiment, the input unit includes isolating transformer T1, two-way Transient Suppression Diode TVS1 and whole Current circuit REC;
The both ends of the armature winding of the isolating transformer T1 are connect with the firewire of attaching plug and zero curve contact respectively, every The both ends of secondary windings from transformer T1 are connected to the positive input terminal and negative input end of rectification circuit REC, the rectification The positive output end of circuit REC is connect with the input terminal of isolation detection module, the negative output terminal ground connection of rectification circuit REC;Two-way wink The both ends of state inhibition diode TVS1 are connected to the both ends of the secondary windings of isolating transformer T1;Wherein, rectification circuit REC Utility grid and subsequent electricity can be realized by above structure using the existing whole bridge rectifier circuit being constituted by a diode Isolation between source circuit to avoid the interference to subsequent conditioning circuit, and plays the role of good safeguard protection.
In the present embodiment, the isolation detection module includes resistance R1, resistance R2, resistance R3, resistance R4, capacitor C1, steady Pressure pipe DW1, inductance L1, diode D2 and amplifier U1, wherein resistance R1 is varistor;
One end of resistance R2 is connected to the positive output end of rectification circuit REC, the same phase of the other end and amplifier U1 of resistance R2 End connection, the output end of amplifier U2 connect with the backward end of amplifier U1 and are formed voltage follower, the output end of amplifier U1 and two The anode connection of pole pipe D2, the cathode of diode D2 are connect with the cathode of voltage-stabiliser tube DW1, the plus earth of voltage-stabiliser tube DW1;Two poles The cathode of pipe D2 is also connect with one end of inductance L1, and the other end of inductance L1 is connected as the second output terminal of isolation detection module In the input terminal of voltage transformation module, the output end of amplifier U1 is the first output end that output module is isolated, and diode D2's is negative Points of common connection between pole and inductance L1 is as external power supply end Vm;
Points of common connection between resistance R2 and the positive output end of rectification circuit REC is grounded by resistance R1, resistance R2 and Points of common connection between the in-phase end of amplifier U1 is grounded by capacitor C1, and one end of resistance R3 is connected to the same phase of amplifier U1 End, the other end of resistance R3 are grounded by resistance R4, and the points of common connection of resistance R3 and resistance R4 are as isolation detection module Voltage detection signal output end is connected to the control signal of switch control module, wherein varistor R1 be used for superpressure into Row clamper, plays a protective role, and resistance R2 and capacitor C1 are for forming RC filter circuit, and voltage follower is due to its height input resistance Anti- characteristic can carry out good protection, the collective effect of inductance L1 and zener diode DW1, equally to rear to back-end circuit Terminal circuit plays a good protective effect, and therefore, by above structure, can effectively improve the job stability of entire circuit, Diode D1's is used to prevent current reflux in lithium battery power supply.
In the present embodiment, the switch module includes the normal open switch K1 and delay-action push-button switch S1 of relay, described The normal open switch K1 and delay-action push-button switch S1 of relay J1 is in parallel, the closure and disconnection of the normal open switch K1 of the relay J1 It is controlled by switch control module.
The switch control module includes resistance R6, resistance R5, adjustable resistance RW1, comparator U3, resistance R7, triode Q1 and resistance R8;
One end of the resistance R6 is connected to the points of common connection of resistance R3 and resistance R4 as input terminal, and resistance R6's is another One end is connect with the in-phase end of comparator U3, and the backward end of comparator U3 is followed by 5V by resistance R5 and adjustable resistance RW1 series connection DC power supply;
The output end of comparator U3 is connect by resistance R7 with the base stage of triode Q1, the collector and 12V of triode Q1 Direct current electrical connection, the emitter of triode Q1 are connect with one end of resistance R8, the other end the encouraging by relay J1 of resistance R8 Magnetic coil ground connection;Wherein, adjustable resistance RW1 is used to set the reference voltage of comparator U3, when not powering on, entire circuit not work Make, when starting, by being manually pressed by delay-action push-button switch, alternating current exports direct current after passing through rectifier circuit rectifies, then passes through Resistance R2 and C1 are filtered, and are then input in voltage conversion unit by voltage follower, convert electricity by first voltage Road exports 12V DC electricity, follows circuit output 5V direct current by second voltage, also, carry out by resistance R3 and resistance R4 Sampling, is input in comparator, when reference voltage of the measurement voltage lower than setting, then compares U3 output high level, triode Q1 conducting, relay J1 obtain it is electric, normal open switch K1 be attracted, delay-action push-button switch closure automatically revert to disconnection after a certain period of time State, at this time since entire circuit is in persistent state, then normal open switch K1 clock is in closure, is not in power-off, works as reality The reference voltage that voltage value is higher than setting is surveyed, comparator exports low level at this time, and triode Q1 ends, relay J1 power loss, often Switch K1 is returned to off-state, so that subsequent circuit be effectively protected;Wherein, delay-action push-button switch is using existing Some button switches, not in this to go forth.
In the present embodiment, the cell switch control circuit includes resistance R13, resistance R14, resistance R15, resistance R16, electricity Hinder R17, triode Q3, triode Q4, voltage-stabiliser tube DW5, voltage-stabiliser tube DW6 and diode D3;
One end of resistance R13 is connected to the output end of amplifier U1 as the control signal of cell switch control circuit, electricity The other end of resistance R13 is grounded by resistance R14, and the points of common connection between resistance R13 and resistance R14 is connected to triode Q3's The base stage of base stage, triode Q3 is connect with the cathode of voltage-stabiliser tube DW5, the plus earth of voltage-stabiliser tube DW5, the emitter of triode Q3 Ground connection;
One end of resistance R16 is connected to charging and discharging lithium battery management electricity as the power input of cell switch control circuit The other end of the power supply output end on road, resistance R16 is connect with the emitter of triode Q4, the collector and diode of triode Q4 The anode connection of D3, the cathode of diode D3 are connected to external power supply end Vm as the output end of cell switch control circuit, electricity One end of resistance R15 is connected to the points of common connection between resistance R16 and the power supply output end of charging and discharging lithium battery management circuit, electricity The other end of resistance R15 is connected to the base stage of triode Q4, the points of common connection between resistance R15 and resistance R17 by resistance R17 It is connected to the collector of triode Q3, wherein triode Q4 is that PNP type triode shows when amplifier U1 has direct current electricity output Current alternating current is working properly, and triode Q3 conducting, at this point, the base stage power loss of triode Q4 is to end, lithium battery is not to voltage Translation circuit is powered, although at this point, lithium battery can be discharged by resistance R15, electric current at this time is smaller, Meet the self discharge rule of lithium battery, will not service life to lithium battery and use impact.
In the present embodiment, the temperature alarming unit include thermistor R9, resistance R10, resistance R11, resistance R12, can Adjust resistance RW2, adjustable resistance RW3, comparator U4, buzzer SP and indicator light LED;
One end of the thermistor R9 is connect with 5V DC power supply, and the other end of thermistor R9 passes through adjustable resistance RW2 ground connection, the points of common connection between thermistor R9 and adjustable resistance RW2 pass through the in-phase end of resistance R11 and comparator U4 Connection, the backward end of comparator U4 after resistance R12 and adjustable resistance RW3 series connection by being grounded, the output end of comparator U4 and three The base stage of pole pipe Q2 connects, and the collector of triode Q2 is connect by resistance R10 with 5V DC power supply, the emitter of triode Q2 It is connect with the anode of buzzer SP, the cathode ground connection of buzzer SP, the emitter of triode Q2 and the anode of indicator light LED connect It connects, the cathode ground connection of indicator light LED;Wherein, thermistor is set on power supply device, for example isolating transformer, lithium battery are attached Closely generate heat serious position, and thermistor R9 and adjustable resistance RW2 are used to convert temperature signal information of voltage, and comparator U4 will Voltage signal corresponding with actual temperature is compared with the temperature threshold of setting, and the corresponding voltage signal of actual temperature is lower than or height In the temperature threshold voltage of setting, then comparator U4 exports high level, control triode Q2 conducting, buzzer SP and indicator light LED operation reminds user's Current Temperatures excessively high, and user decides whether to disconnect power supply according to actual demand;Wherein temperature-sensitive Resistance is divided into two kinds, and one is posive temperature coefficient thermistor PTC, one is negative tempperature coefficient thermistor NTC, positive temperature system Number thermistor becomes larger as temperature increases resistance value, and negative tempperature coefficient thermistor increases and resistance value reduction with temperature, because This should be the temperature threshold the voltage whether corresponding voltage signal of actual temperature is less than setting when comparing when using PTC, And it when being NTC, when comparing should be the temperature threshold the voltage whether corresponding voltage signal of actual temperature is greater than setting.
In the present embodiment, the voltage transformation module includes first voltage translation circuit and second voltage translation circuit;
The input terminal of the first voltage translation circuit is connect with the output end of isolation detection module, first voltage transformation electricity The output end output 12V DC electricity on road;The output of the input terminal and first voltage translation circuit of the second voltage translation circuit The output end of end connection, the second voltage translation circuit exports 5V direct current;
Wherein, first voltage translation circuit is LM7812 chip;Second voltage translation circuit is LM7805 chip, specific Circuit is as shown in Figure 2;By this structure, directly can provide two different DC voltages for stereo set, from without It to be once again set up transforming circuit in stereo set, provides convenience for the circuit reduction of stereo set, sound equipment is set to reduce Standby interference, wherein 12V DC electricity can be the power supply of the equipment such as loudspeaker, and 5V direct current is for being powered bluetooth module; Certainly, in the application, 12V DC electricity is also used to the magnet exciting coil power supply to relay J1, and 5V direct current is also used to temperature Alarm unit is powered.
Finally, it is stated that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng The utility model is described in detail according to preferred embodiment, those skilled in the art should understand that, it can be to this The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model It encloses, should all cover in the scope of the claims of the utility model.

Claims (8)

1. a kind of duplicate supply formula Bluetooth audio device power supply device, it is characterised in that: including input unit, voltage transformation module, power supply Protection location, temperature alarming unit, lithium battery, charging and discharging lithium battery management circuit and the battery for controlling lithium battery power supply ON-OFF control circuit;
Input unit, input terminal is electrically connected by attaching plug with city, for 220V alternating current to be converted to direct current and is exported To voltage transformation module;
The output end of voltage transformation module, input terminal and input unit connects, and the direct current for exporting input unit turns It is changed to 12V and 5V direct current supply Bluetooth audio device equipment;
Power supply protection unit includes switch module, isolation detection module and switch control module:
The switch module is set between the firewire of attaching plug and input unit, for controlling attaching plug and input unit Between supply access on-off;
The isolation detection module, input terminal are connected to the output end of input unit, second output terminal and voltage transformation module Input terminal connection, direct current for exporting input unit is electrically isolated output to voltage transformation module, and for detecting input The output voltage and voltage sense signal of unit;
The switch control module, for receiving the voltage detection signal of isolation detection module output and working as the defeated of input unit Control switch module disconnects when voltage is greater than the set value out;
The temperature alarming unit, for detecting temperature when entire power supply device works and being more than setting value Times in temperature It is alert;
The charging and discharging lithium battery manages circuit, connect with lithium battery, is managed, fills for the charge and discharge to lithium battery Electrical input is connected to the first output end of isolation detection module, the power supply of power supply output end connection cell switch control circuit Input terminal;
The cell switch control circuit, control signal are connected to the first output end of isolation detection module, power defeated Outlet is connected to the external power supply end Vm of isolation detection module, logical for controlling the power supply that lithium battery is powered to voltage transformation module Road.
2. duplicate supply formula Bluetooth audio device power supply device according to claim 1, it is characterised in that: the input unit include every From transformer T1, two-way Transient Suppression Diode TVS1 and rectification circuit REC;
The both ends of the armature winding of the isolating transformer T1 are connect with the firewire of attaching plug and zero curve contact respectively, and isolation becomes The both ends of the secondary windings of depressor T1 are connected to the positive input terminal and negative input end of rectification circuit REC, the rectification circuit The positive output end of REC is connect with the input terminal of isolation detection module, the negative output terminal ground connection of rectification circuit REC;Two-way transient state suppression The both ends of diode TVS1 processed are connected to the both ends of the secondary windings of isolating transformer T1.
3. duplicate supply formula Bluetooth audio device power supply device according to claim 2, it is characterised in that: the isolation detection module packet Resistance R1, resistance R2, resistance R3, resistance R4, capacitor C1, voltage-stabiliser tube DW1, inductance L1, diode D2 and amplifier U1 are included, wherein Resistance R1 is varistor;
One end of resistance R2 is connected to the positive output end of rectification circuit REC, and the other end of resistance R2 and the in-phase end of amplifier U1 connect It connects, the output end of amplifier U2 connect with the backward end of amplifier U1 and formed voltage follower, the output end and diode of amplifier U1 The anode connection of D2, the cathode of diode D2 are connect with the cathode of voltage-stabiliser tube DW1, the plus earth of voltage-stabiliser tube DW1;Diode D2 Cathode also connect with one end of inductance L1, the other end of inductance L1 is connected to electricity as the second output terminal of isolation detection module Press converter unit input terminal, the output end of amplifier U1 be isolated output module the first output end, the cathode of diode D2 with Points of common connection between inductance L1 is as external power supply end Vm;
Points of common connection between resistance R2 and the positive output end of rectification circuit REC is grounded by resistance R1, resistance R2 and amplifier Points of common connection between the in-phase end of U1 is grounded by capacitor C1, and one end of resistance R3 is connected to the in-phase end of amplifier U1, electricity The other end of resistance R3 is grounded by resistance R4, and the points of common connection of resistance R3 and resistance R4 are examined as the voltage of isolation detection module Survey the control signal that signal output end is connected to switch control module.
4. duplicate supply formula Bluetooth audio device power supply device according to claim 3, it is characterised in that: the switch module include after The normal open switch K1 and delay-action push-button switch S1 of the normal open switch K1 of electric appliance and delay-action push-button switch S1, the relay J1 are simultaneously The closure of connection, the normal open switch K1 of the relay J1 is controlled with disconnection by switch control module.
5. duplicate supply formula Bluetooth audio device power supply device according to claim 4, it is characterised in that: the switch control module packet Include resistance R6, resistance R5, adjustable resistance RW1, comparator U3, resistance R7, triode Q1 and resistance R8;
One end of the resistance R6 is connected to the points of common connection of resistance R3 and resistance R4, the other end of resistance R6 as input terminal It is connect with the in-phase end of comparator U3, the backward end of comparator U3 is followed by 5V direct current by resistance R5 and adjustable resistance RW1 series connection Power supply;
The output end of comparator U3 is connect by resistance R7 with the base stage of triode Q1, the collector and 12V DC of triode Q1 Electrical connection, the emitter of triode Q1 are connect with one end of resistance R8, and the other end of resistance R8 passes through the excitation wire of relay J1 Circle ground connection.
6. according to claim 5 duplicate supply formula Bluetooth audio device power supply device, it is characterised in that: the cell switch control circuit packet Include resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, triode Q3, triode Q4, voltage-stabiliser tube DW5, voltage-stabiliser tube DW6 and diode D3;
One end of resistance R13 is connected to the output end of amplifier U1, resistance R13 as the control signal of cell switch control circuit The other end be grounded by resistance R14, the points of common connection between resistance R13 and resistance R14 is connected to the base stage of triode Q3, The base stage of triode Q3 is connect with the cathode of voltage-stabiliser tube DW5, the plus earth of voltage-stabiliser tube DW5, the emitter ground connection of triode Q3;
One end of resistance R16 is connected to charging and discharging lithium battery management circuit as the power input of cell switch control circuit Power supply output end, the other end of resistance R16 are connect with the emitter of triode Q4, and the collector of triode Q4 is with diode D3's Anode connection, the cathode of diode D3 are connected to external power supply end Vm, resistance R15 as the output end of cell switch control circuit One end be connected to resistance R16 and charging and discharging lithium battery management circuit power supply output end between points of common connection, resistance R15 The other end base stage of triode Q4 is connected to by resistance R17, the points of common connection connection between resistance R15 and resistance R17 In the collector of triode Q3, wherein triode Q4 is PNP type triode.
7. duplicate supply formula Bluetooth audio device power supply device according to claim 6, it is characterised in that: the temperature alarming unit packet Include thermistor R9, resistance R10, resistance R11, resistance R12, adjustable resistance RW2, adjustable resistance RW3, comparator U4, buzzer SP and indicator light LED;
One end of the thermistor R9 is connect with 5V DC power supply, and the other end of thermistor R9 is connect by adjustable resistance RW2 Ground, the points of common connection between thermistor R9 and adjustable resistance RW2 are connect by resistance R11 with the in-phase end of comparator U4, The backward end of comparator U4 after resistance R12 and adjustable resistance RW3 series connection by being grounded, the output end and triode Q2 of comparator U4 Base stage connection, the collector of triode Q2 connect by resistance R10 with 5V DC power supply, the emitter of triode Q2 and buzzing The anode connection of device SP, the cathode ground connection of buzzer SP, the emitter of triode Q2 connect with the anode of indicator light LED, indicate The cathode of lamp LED is grounded.
8. duplicate supply formula Bluetooth audio device power supply device according to claim 7, it is characterised in that: the voltage transformation module packet Include first voltage translation circuit and second voltage translation circuit;
The input terminal of the first voltage translation circuit is connect with the output end of isolation detection module, first voltage translation circuit Output end exports 12V DC electricity;The input terminal of the second voltage translation circuit and the output end of first voltage translation circuit connect It connects, the output end of the second voltage translation circuit exports 5V direct current;
Wherein, first voltage translation circuit is LM7812 chip;Second voltage translation circuit is LM7805 chip.
CN201820824107.1U 2018-05-30 2018-05-30 Duplicate supply formula Bluetooth audio device power supply device Active CN208210264U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109799412A (en) * 2019-03-27 2019-05-24 成都昊瀚科技有限公司 A kind of ESD power supply linkage controller
CN110610602A (en) * 2019-10-17 2019-12-24 恩平市力卡电子有限公司 Wireless conference system capable of automatically starting and stopping conference microphone unit and control method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109799412A (en) * 2019-03-27 2019-05-24 成都昊瀚科技有限公司 A kind of ESD power supply linkage controller
CN110610602A (en) * 2019-10-17 2019-12-24 恩平市力卡电子有限公司 Wireless conference system capable of automatically starting and stopping conference microphone unit and control method thereof

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