CN207897143U

CN207897143U - A kind of boosting output power amplification module of mobile pull rod speaker

Info

Publication number: CN207897143U
Application number: CN201721810089.3U
Authority: CN
Inventors: 陈兆龙; 梁平; 谭伟洪
Original assignee: Guangzhou Guoguang Audio Technology Co Ltd
Current assignee: Guangzhou Guoguang Audio Technology Co Ltd
Priority date: 2017-12-22
Filing date: 2017-12-22
Publication date: 2018-09-21
Anticipated expiration: 2027-12-22

Abstract

The utility model is related to speaker technology fields, more particularly to a kind of boosting output power amplification module of mobile pull rod speaker, the boosting output power amplification module is separately connected the loudspeaker and PVCC power supplys of the mobile pull rod speaker, the boosting output power amplification module includes booster circuit, power amplification circuit and eliminates switching surge circuit, and the power amplification circuit is connect with booster circuit and elimination switching surge circuit respectively；The power amplification circuit includes digital power amplifier chip U16, triode Q11, inductance L5, inductance L6 and needle stand CN2.The utility model provides a kind of boosting output power amplification module of mobile pull rod speaker, and using digit chip, power consumption is small, and energy-efficient to utilize power supply, circuit structure is simple, and sound quality is good, can effectively improve the cruise duration of mobile pull rod speaker；The utility model additionally uses booster circuit and powers for power amplifier, can reach the audio power output of bigger, gives great volume, preferably meet user demand.

Description

A kind of boosting output power amplification module of mobile pull rod speaker

Technical field

The utility model is related to speaker technology field, the boosting output power of especially a kind of mobile pull rod speaker amplifies mould Block.

Background technology

Modern society, Mobile loudspeaker box are widely applied in many different occasions, have become curbside sales field, square Dance, the small-sized performance in field etc. need the capital equipment used when public address.Storage is used when being used outdoors due to Mobile loudspeaker box mostly Battery powered, and often power consumption is big for existing power amplifier module, causes the cruise duration that Mobile loudspeaker box open air uses short, it is difficult To meet the needs of user is to multi-functional, high-performance mobile sound-box device；And reserve of electricity it is big accumulator volume it is also big, can cause Mobile loudspeaker box volume is big, inconvenient for use.

Utility model content

In order to overcome the disadvantages mentioned above of the prior art, the purpose of this utility model to be to provide a kind of liter of mobile pull rod speaker Output power amplification module is pressed, using digit chip, power consumption is small, and energy-efficient to utilize power supply, circuit structure is simple, sound quality It is good, the cruise duration of mobile pull rod speaker can be effectively improved；The utility model additionally uses simple high current DC/DC booster circuits It powers for power amplifier, can reach the audio power output of bigger, give great volume, preferably meet user demand.

Technical solution adopted by the utility model to solve its technical problems is：A kind of boosting power supply of mobile pull rod speaker Power amplifier module, the boosting output power amplification module are separately connected the loudspeaker and PVCC electricity of the mobile pull rod speaker Source, the boosting output power amplification module include booster circuit, power amplification circuit and elimination switching surge circuit, the work( Rate amplifying circuit is connect with booster circuit and elimination switching surge circuit respectively；

The power amplification circuit includes digital power amplifier chip U16, triode Q11, inductance L5, inductance L6 and needle stand CN2； 2 feet, 3 feet of the digital power amplifier chip U16 connect the elimination switching surge circuit, and 2 feet pass through resistance R103 connections MUTE The mute control terminal of microcontroller, and be grounded by resistance R166；17 feet, 18 feet, 19 feet, 31 feet, 32 feet connect 22V power supplies, 17 feet, 18 feet, 19 feet by capacitance C109 and C37 ground connection in parallel, 31 feet, 32 feet by capacitance C108, C36 in parallel and C149 is grounded；

27 feet of the digital power amplifier chip U16, one end of 29 feet connection inductance L6, one end of the inductance L6 also passes through 26 feet of capacitance C146 connection digital power amplifier chips U16, pass through 30 feet of capacitance C144 connection digital power amplifier chips U16；It is described 1 foot of the other end connection needle stand CN2 of inductance L6, one end of capacitance C76, C110, resistance R156, described capacitance C76, C110's The other end is grounded, and the other end of the resistance R156 is grounded by capacitance C150；

21 feet of the digital power amplifier chip U16, one end of 23 feet connection inductance L5, one end of the inductance L5 also passes through 24 feet of capacitance C147 connection digital power amplifier chips U16, pass through 20 feet of capacitance C145 connection digital power amplifier chips U16；It is described 2 feet of the other end connection needle stand CN2 of inductance L5, one end of capacitance C77, C143, resistance R155, described capacitance C77, C143's The other end is grounded, and the other end of the resistance R155 is grounded by capacitance C151.

The base stage of the triode Q11 connects OUT_AMP audio signal input ends；The emitter of triode Q11 passes through electricity Hold 5 feet of C75 connection digital power amplifier chips U16, and passes through the base stage of resistance R162, R152 connecting triode Q11；Triode The collector of Q11 by 4 feet of capacitance C39 connection digital power amplifier chips U16, and by resistance R153 connection resistance R149, The other end of one end of R82, polar capacitor C80, resistance R149 connects 22V power supplies, and the other end of resistance R82 connects three poles The base stage of pipe Q11, the other end ground connection of polar capacitor C80.

Preferably, the booster circuit includes boost chip U14, inductance L7, diode D12, diode D13, resistance 4 feet of R150 and resistance R151, the boost chip U14 connect one end of PVCC power supplys and inductance L7, and pass through pole in parallel Property capacitance C107, capacitance C78 ground connection；The other end of the 3 feet connection inductance L7 of boost chip U14, and by diode D13, simultaneously The capacitance C79 on connection ground connects the anode of diode D12 with polar capacitor C152, and the cathode connection 22V of the diode D12 is supplied Power supply, and connect one end of polar capacitor C153, resistance R129, the polar capacitor C153, resistance R129 another termination Ground；5 feet of the boost chip U14 pass through resistance R151 connection diodes by resistance R172 and R150 ground connection in parallel The cathode of D13.

Preferably, the elimination switching surge circuit includes diode D8, zener diode D9, triode Q8, triode Q9, resistance R160 and capacitance C165；2 feet, 3 feet of the digital power amplifier chip U16 are connected and the current collection of connecting triode Q9 The collector of pole, triode Q9 passes through resistance R161 connection PVCC power supplys；The emitter of triode Q9, the emitter of triode Q8 It is connected and is grounded；The base stage of triode Q9 passes through the collector of resistance R160 connecting triodes Q8, the collector of triode Q8 Pass through resistance R159 connection PVCC power supplys；The anode of the base stage connection zener diode D9 of triode Q8 and the resistance for passing through parallel connection R158 and capacitance C148 ground connection, the cathode of zener diode D9 by diode D8 in parallel, resistance R157 connection PVCC power supplys, And it is grounded by capacitance C165.

Preferably, 6 feet of the digital power amplifier chip U16 are grounded by capacitance C40；7 feet are connect with 6 feet, and pass through electricity Hinder 8 foot of R148 connections；8 feet are grounded by resistance R154；1 foot of the digital power amplifier chip U16,9 feet, 10 feet, 11 feet, 13 Foot, 14 feet, 15 feet, 22 feet, 25 feet are grounded.

Preferably, test point TP61 is equipped between the diode D12 and 22V power supplies；The needle stand CN2 connections loudspeaker , 1 foot, 2 feet of the needle stand CN2 are respectively equipped with test point TP13, TP14.

The boost chip U14 is a PWM modulation DC/DC booster chips.

Compared with prior art, the utility model has the beneficial effects that：A kind of boosting output power of mobile pull rod speaker Amplification module, using digit chip, power consumption is small, and energy-efficient to utilize power supply, circuit structure is simple, and sound quality is good, can effectively carry The cruise duration of the mobile pull rod speaker of height；It is power amplification that the utility model, which additionally uses simple high current DC/DC booster circuits, Device is powered, and be can reach the audio power output of bigger, is given great volume, preferably meet user demand.

Description of the drawings

Fig. 1 is the circuit diagram of the utility model.

Specific implementation mode

The utility model is further illustrated with embodiment in conjunction with description of the drawings：

Embodiment one：With reference to figure 1, a kind of boosting output power amplification module of mobile pull rod speaker, the boosting power supply Power amplifier module is separately connected the loudspeaker and PVCC power supplys of the mobile pull rod speaker, the boosting output power amplification module Including booster circuit, power amplification circuit and eliminate switching surge circuit, the power amplification circuit respectively with booster circuit and Eliminate the connection of switching surge circuit；

The power amplification circuit includes digital power amplifier chip U16, triode Q11, inductance L5, inductance L6 and needle stand CN2； 2 feet, 3 feet of the digital power amplifier chip U16 connect the elimination switching surge circuit, and 2 feet pass through resistance R103 connections MUTE The mute control terminal of microcontroller, and be grounded by resistance R166；The mute control terminal of MUTE microcontrollers connects through resistance R103, R166 It is connected on the mute control foot of 12 feet of digital power amplifier chip U16, when the utility model uses earphone as output as mute Control.

17 feet, 18 feet, 19 feet, 31 feet, 32 feet of the digital power amplifier chip U16 connect 22V power supplies, 17 feet, 18 By capacitance C109 and C37 ground connection in parallel, 31 feet, 32 feet pass through capacitance C108, C36 and C149 ground connection in parallel for foot, 19 feet； The digital power amplifier chip U16 is high efficiency high-quality digital power amplifier chip, and the 22V power supplys after boosting supply digital power amplifier chip 17,18,19,31,32 feet of U16 have connect capacitance C36, C37, C108, C109, C149 filter capacitor and have arrived on this 5 power supply feet The High-frequency Interference on power amplifier power supply is eliminated on ground.

21 feet of the digital power amplifier chip U16, one end of 23 feet connection inductance L5, one end of the inductance L5 also passes through 24 feet of capacitance C147 connection digital power amplifier chips U16, pass through 20 feet of capacitance C145 connection digital power amplifier chips U16；It is described 2 feet of the other end connection needle stand CN2 of inductance L5, one end of capacitance C77, C143, resistance R155, described capacitance C77, C143's The other end is grounded, and the other end of the resistance R155 is grounded by capacitance C151；

The positive phase signals of 27, the 29 foot output power audio PWM of the digital power amplifier chip U16,21,23 foot output powers The negative signal of audio PWM, inductance L6, capacitance C76, C110, C150, resistance R156 collectively constitute power audio PWM and just believe Number high frequency filter, inductance L5, capacitance C77, C143, C151, resistance R155 collectively constitute power audio PWM negative signals High frequency filter, the audio obtained after filtering times are sent on loudspeaker by needle stand CN2 outputs and are made a sound.

The base stage of the triode Q11 connects OUT_AMP audio signal input ends；The emitter of triode Q11 passes through electricity Hold 5 feet of C75 connection digital power amplifier chips U16, and passes through the base stage of resistance R162, R152 connecting triode Q11；Triode The collector of Q11 by 4 feet of capacitance C39 connection digital power amplifier chips U16, and by resistance R153 connection resistance R149, The other end of one end of R82, polar capacitor C80, resistance R149 connects 22V power supplies, and the other end of resistance R82 connects three poles The base stage of pipe Q11, the other end ground connection of polar capacitor C80.The OUT_AMP audios of the OUT_AMP audio signal input ends are believed Number amplify and be processed into positive and negative phase signals through triode Q11, positive phase signals are sent out through capacitance C75 by the emitter of triode Q11 5 feet of digital power amplifier chip U16 are sent to, send out negative signal by the collector of triode Q11 is sent to digital power amplifier through capacitance C39 The power supply of 4 feet of chip U16, triode Q11 inverting amplifiers is obtained by 22V after R149, C80 filtering, resistance R82, R152, R153, R162 collectively constitute the biasing circuit of triode Q11.

Preferably, the booster circuit includes boost chip U14, inductance L7, diode D12, diode D13, resistance 4 feet of R150 and resistance R151, the boost chip U14 connect one end of PVCC power supplys and inductance L7, and pass through pole in parallel Property capacitance C107, capacitance C78 ground connection；The PVCC power supplys give boost chip U14 after polar capacitor C107, capacitance C78 filtering 4 feet power supply, boost chip U14 is a PWM modulation DC/DC booster chips, and L7 is the high current energy storage of the booster circuit Inductance；

The other end of the 3 feet connection inductance L7 of boost chip U14, and pass through diode D13, the capacitance C79 of earth The anode of diode D12, the 3 feet output PWM modulation power pulse waveform letter of boost chip U14 are connected with polar capacitor C152 Number, the DC power supply after diode D13 rectifications output boosting, the power supply after boosting is made of capacitance C79, polar capacitor C152 High-frequency filter circuit becomes DC voltage more higher than PVCC power supply after filtering；The cathode connection 22V of the diode D12 is supplied Power supply, and connect one end of polar capacitor C153, resistance R129, the polar capacitor C153, resistance R129 another termination Ground；It is further filtered through diode D12, polar capacitor C153 after polar capacitor C152 filtering, obtains more stable direct current 22V electricity It is a bleeder resistance that source, which is supplied to power amplification circuit, resistance R129, for polar capacitor C153 bulky capacitors after powered-down source Electric discharge completely.

5 feet of the boost chip U14 pass through resistance R151 connections two by resistance R172 and R150 ground connection in parallel The cathode of pole pipe D13.Resistance R151, R150, R172 composition voltage stabilizing samples bleeder circuit, and the 5 of boost chip U14 is sent to after partial pressure On foot, 5 feet of boost chip U14 are that FB detects foot, and the PWM voltage outputs of adjustment itself reach voltage stabilizing purpose.

Diode D8, D9, triode Q8, Q9, capacitance C165, resistance R157, R158, R159, R160, R161 are collectively constituted Switching surge circuit is eliminated, by 2,3 feet of the collector output control digital power amplifier chip U16 of triode Q9.

Preferably, 6 feet of the digital power amplifier chip U16 are grounded by capacitance C40；7 feet are connect with 6 feet, and pass through electricity Hinder 8 foot of R148 connections；8 feet are grounded by resistance R154；6,7,8 feet of digital power amplifier core U16 are that internal amplification factor gain is set It sets, is determined by external resistance R148, R154 setting.

1 foot, 9 feet, 10 feet, 11 feet, 13 feet, 14 feet, 15 feet, 22 feet, 25 feet of the digital power amplifier chip U16 connect Ground.

Preferably, test point TP61 is equipped between the diode D12 and 22V power supplies；The needle stand CN2 connections loudspeaker , 1 foot, 2 feet of the needle stand CN2 are respectively equipped with test point TP13, TP14.Wherein, TP13, TP14 are that power amplification circuit is defeated The test point gone out, TP61 are the test points of booster circuit output, for doing fixture test when plant produced and facilitating repairman What repair used.

The boost chip U14 is a PWM modulation DC/DC booster chips.

The major function of the utility model：A kind of boosting output power amplification module of mobile pull rod speaker, uses number Chip, power consumption is small, and energy-efficient to utilize power supply, circuit structure is simple, and sound quality is good, can effectively improve the continuous of mobile pull rod speaker ETS estimated time of sailing；The utility model additionally uses simple high current DC/DC booster circuits and powers for power amplifier, can reach bigger Audio power exports, and gives great volume, preferably meets user demand.

In conclusion after those skilled in the art read the utility model file, skill according to the present utility model Art scheme and technical concept are not necessarily to creative mental labour and make other various corresponding conversion schemes, and it is new to belong to this practicality The range that type is protected.

Claims

1. a kind of boosting output power amplification module of mobile pull rod speaker, the boosting output power amplification module are separately connected The loudspeaker and PVCC power supplys of the mobile pull rod speaker, it is characterised in that：It is opened including booster circuit, power amplification circuit and elimination Jing-Well point Guanchon hits circuit, and the power amplification circuit is connect with booster circuit and elimination switching surge circuit respectively；The power amplification Circuit includes digital power amplifier chip U16, triode Q11, inductance L5, inductance L6 and needle stand CN2；The digital power amplifier chip U16 2 feet, 3 feet connect the elimination switching surge circuit, 2 feet by the mute control terminal of resistance R103 connection MUTE microcontrollers, and It is grounded by resistance R166；17 feet, 18 feet, 19 feet, 31 feet, 32 feet connect 22V power supplies, and 17 feet, 18 feet, 19 feet pass through simultaneously Capacitance C109 and the C37 ground connection of connection, 31 feet, 32 feet pass through capacitance C108, C36 and C149 ground connection in parallel；The digital power amplifier 27 feet of chip U16, one end of 29 feet connection inductance L6, one end of the inductance L6 also passes through capacitance C146 connection digital power amplifiers 26 feet of chip U16 pass through 30 feet of capacitance C144 connection digital power amplifier chips U16；The other end of the inductance L6 connects needle 1 foot of seat CN2, one end of capacitance C76, C110, resistance R156, the other end ground connection of described capacitance C76, C110, the resistance The other end of R156 is grounded by capacitance C150；21 feet of the digital power amplifier chip U16, one end of 23 feet connection inductance L5, One end of the inductance L5 also by 24 feet of capacitance C147 connection digital power amplifier chips U16, passes through capacitance C145 connection numbers 20 feet of power amplifier chips U16；2 feet of the other end connection needle stand CN2 of the inductance L5, capacitance C77, C143, resistance R155 One end, the other end ground connection of described capacitance C77, C143, the other end of the resistance R155 are grounded by capacitance C151.

2. a kind of boosting output power amplification module of mobile pull rod speaker according to claim 1, it is characterised in that：Institute State the base stage connection OUT_AMP audio signal input ends of triode Q11；The emitter of triode Q11 passes through capacitance C75 connection numbers 5 feet of word power amplifier chips U16, and pass through the base stage of resistance R162, R152 connecting triode Q11；The collector of triode Q11 is logical 4 feet of capacitance C39 connection digital power amplifier chips U16 are crossed, and pass through resistance R153 connection resistance R149, R82, polar capacitor C80 One end, the other end of resistance R149 connects 22V power supplies, the base stage of the other end connecting triode Q11 of resistance R82, pole Property capacitance C80 other end ground connection.

3. a kind of boosting output power amplification module of mobile pull rod speaker according to claim 2, it is characterised in that：Institute It includes boost chip U14, inductance L7, diode D12, diode D13, resistance R150 and resistance R151 to state booster circuit, described One end of 4 feet connection the PVCC power supplys and inductance L7 of boost chip U14, and connect by polar capacitor C107, capacitance C78 in parallel Ground；The other end of the 3 feet connection inductance L7 of boost chip U14, and pass through diode D13, the capacitance C79 of earth and polarity The cathode of the anode of capacitance C152 connection diodes D12, the diode D12 connects 22V power supplies, and connects polar capacitor One end of C153, resistance R129, the polar capacitor C153, resistance R129 the other end ground connection；The 5 of the boost chip U14 Foot passes through the cathode of resistance R151 connection diodes D13 by resistance R172 and R150 ground connection in parallel.

4. a kind of boosting output power amplification module of mobile pull rod speaker according to claim 3, it is characterised in that：Institute It includes diode D8, zener diode D9, triode Q8, triode Q9, resistance R160 and capacitance to state and eliminate switching surge circuit C165；2 feet, 3 feet of the digital power amplifier chip U16 are connected and the collector of connecting triode Q9, the current collection of triode Q9 Pole passes through resistance R161 connection PVCC power supplys；The emitter of triode Q9, the emitter of triode Q8 are connected and are grounded；Three poles The base stage of pipe Q9 is connected by the collector of resistance R160 connecting triodes Q8, the collector of triode Q8 by resistance R159 PVCC power supplys；The base stage of triode Q8 connects the anode of zener diode D9 and is connect by resistance R158 and capacitance C148 in parallel Ground, the cathode of zener diode D9 are connect by diode D8 in parallel, resistance R157 connection PVCC power supplys by capacitance C165 Ground.

5. a kind of boosting output power amplification module of mobile pull rod speaker according to claim 3 or 4, feature exist In：6 feet of the digital power amplifier chip U16 are grounded by capacitance C40；7 feet are connect with 6 feet, and pass through resistance R148 connections 8 Foot；8 feet are grounded by resistance R154；1 foot of the digital power amplifier chip U16,9 feet, 10 feet, 11 feet, 13 feet, 14 feet, 15 feet, 22 feet, 25 feet are grounded.

6. a kind of boosting output power amplification module of mobile pull rod speaker according to claim 5, it is characterised in that：Institute It states and is equipped with test point TP61 between diode D12 and 22V power supply；The needle stand CN2 connections loudspeaker, the 1 of the needle stand CN2 Foot, 2 feet are respectively equipped with test point TP13, TP14；The boost chip U14 is a PWM modulation DC/DC booster chips.