CN211209910U - Chargeable intelligent sound power management system - Google Patents
Chargeable intelligent sound power management system Download PDFInfo
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- CN211209910U CN211209910U CN201921197878.3U CN201921197878U CN211209910U CN 211209910 U CN211209910 U CN 211209910U CN 201921197878 U CN201921197878 U CN 201921197878U CN 211209910 U CN211209910 U CN 211209910U
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Abstract
The utility model relates to a chargeable intelligent stereo set power management system, the outside audio signal who will receive is enlargied and is broadcast away through the speaker. The charging circuit is used for charging the battery pack module, the switching circuit is used for starting or stopping power supply of the intelligent sound box, the boosting circuit boosts the voltage of the battery pack module and outputs the boosted voltage to the power amplifier, and the signal sampling feedback circuit is used for collecting the power signal of the power amplifier in real time. The single chip microcomputer circuit outputs a PWM signal to the charging circuit according to the current of the power input interface, and the PWM signal is used for adjusting the charging current and controlling the charging time of the battery pack module; and simultaneously, the output voltage of the booster circuit is controlled according to the acquired real-time power signal, so that the output voltage changes in real time along with the change of the power amplifier. The utility model provides a power management system had both taken into account the work efficiency of group battery module, had also taken into account the effect of speaker broadcast music.
Description
Technical Field
The application relates to the field of intelligent sound equipment, mobile phones, intelligent home and electronic information, in particular to an intelligent sound equipment power supply management system applied to power supply of batteries such as lithium batteries, dry batteries and lead-acid batteries.
Background
At present, in the field of intelligent sound, mobile phones and intelligent home, along with the rapid development of the internet of things, the bluetooth technology of the intelligent mobile phone, the Wifi technology and artificial intelligence, the development of outdoor sports, mobile communication and intelligent voice control electronic portable equipment is rapid, people increase the demand of portable equipment, and the essential portable electronic equipment is the battery power supply system formed by the battery and the direct-current power supply boosting power supply management. The lithium battery in the prior art is limited by technology and process, the capacity of the battery cannot be infinite, and the working time of the product can be ensured to be long enough only when electronic products such as outdoor portable intelligent sound equipment, smart phones, internet of things terminals and the like have large requirements on the capacity of the battery. Under the condition that the capacity of the battery is not changed, the working time of the product is required to be prolonged, and the only effective method is to improve the efficiency of the discharge power management of the battery.
Fig. 1 shows a conventional power management system for a portable intelligent audio device, which includes a power input interface 1, a charging circuit 2, a battery module 3, a switch circuit 4, a voltage boosting circuit 5, a power amplifier 6, a control circuit 7, an audio input circuit 8, and a speaker 9. The charging circuit 2 receives an external power supply from the power input interface 1 and charges the battery pack module 3, the booster circuit 5 boosts the voltage of the battery pack module 3 to a voltage value required by a circuit power supply system, the switch circuit 4 realizes the on and off of the power supply equipment, and the control circuit 7 controls the discharging current limitation and the short-circuit protection of the battery pack module 3 and the on and off of the switch circuit 4. The power amplifier 6 receives the high voltage output from the booster circuit 5 and converts it into power required by the speaker 9, so that the speaker 9 can operate normally. The audio input circuit 8 is used to output audio signals to the power amplifier 6 for playback by the speaker 9.
The traditional intelligent sound power management design mode is that in order to ensure that the power amplifier 6 has enough power output and the loudspeaker 9 has enough driving power, the current is directly boosted to a fixed and higher voltage value through the booster circuit 5. However, the music signal is dynamic, when the music signal is large, the power amplifier 6 needs a high voltage value, and at this time, the output voltage of the booster circuit 5 just matches; when the music signal is small, the power amplifier 6 only needs a small voltage value, but the booster circuit 5 still outputs a high voltage value, and the two cannot be well matched. Thus, the voltage difference between the voltage of the battery module 3 and the voltage value output by the booster circuit 5 is large, the efficiency of the booster circuit 5 is reduced at this time, and most of the energy of the battery module 3 is converted into the heat energy of the booster circuit 5 and is lost.
To sum up, the power amplifier 6 of the conventional intelligent audio power management system maintains the voltage boosting circuit 5 at a high constant voltage value regardless of busy or low power, resulting in low working efficiency and shortened audio battery service time. Meanwhile, the design can not ensure low distortion, large dynamic and high power operation of the sound equipment, can not prolong the service time of the battery, and can not meet the requirements of current users.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a chargeable intelligent stereo set power management system can solve the problem that current stereo set low distortion, group battery can't improve work efficiency.
In order to solve the above-mentioned problem, the embodiment of the present invention provides the following technical solutions:
the utility model provides a chargeable intelligent sound power management system for give the power supply of intelligent sound, with received external audio signal amplification and broadcast away through the speaker, it includes power input interface, charging circuit, battery pack module, switch circuit, boost circuit and power amplifier, wherein, charging circuit receives external power supply by power input interface and gives the battery pack module charges, switch circuit is used for turning on or turn off the power supply of intelligent sound, boost circuit with the voltage of battery pack module is carried out the boost, and is exported to power amplifier, its characterized in that, chargeable intelligent sound power management system still includes:
the signal sampling feedback circuit is connected with the power amplifier and is used for acquiring the power signal of the power amplifier in real time; and
the single chip microcomputer circuit is connected with the charging circuit, the switching circuit, the booster circuit and the signal sampling feedback circuit;
the single chip microcomputer circuit is a single chip microcomputer chip with a plurality of pins, outputs a Pulse Width Modulation (PWM) signal to the charging circuit according to the current of the power input interface, and is used for adjusting the charging current and controlling the charging time of the battery pack module; and simultaneously, the output voltage of the booster circuit is controlled according to the real-time power signal acquired by the signal sampling feedback circuit, so that the output voltage changes in real time along with the change of the power amplifier.
And the switch key circuit is connected with the singlechip circuit and is used for outputting a user startup and shutdown instruction.
Further, the single chip microcomputer circuit is connected with the power amplifier, when the switch key circuit outputs a power on/off signal, the single chip microcomputer circuit outputs a mute signal to the power amplifier, and the power amplifier is turned off instantly, so that the power amplifier is prevented from being interfered by power on/off noise.
Furthermore, the charging circuit comprises two first MOS transistors forming a pulse width modulation switching circuit, and gates of the first MOS transistors are respectively connected to the pulse width modulation signal pins of the single chip microcomputer chip, and are used for receiving the PWM signal output by the single chip microcomputer chip, so as to adjust the duty ratio of the output voltage.
Further, still include:
the two voltage dividing resistors are used for dividing the external power received by the power input interface into proper voltage values;
the current limiting resistor is connected with the common node ends of the two voltage dividing resistors and the external power supply current sensing pin of the single chip microcomputer chip; and
and the current-limiting capacitor is connected with one of the voltage-dividing resistors in parallel and is used for providing stable reference voltage.
Further, the switching circuit includes:
the base electrode of the triode is connected with the switch control pin of the singlechip chip and is used for receiving a starting or closing signal, and the emitting electrode of the triode is grounded; and
and the grid electrode of the second MOS tube is connected with the collector electrode of the triode, the input end of the second MOS tube is connected with the battery pack module, and the output end of the second MOS tube is used for outputting a switch control signal.
Furthermore, the boost circuit comprises a boost chip with a plurality of pins, wherein the boost electric signal pin of the boost chip is connected with the power amplifier and is used for outputting a boosted voltage signal; the boosting chip I2C or Uart pin is connected with the I2C or Uart pin corresponding to the single chip microcomputer chip and is used for adjusting boosting according to the boosting control signal of the single chip microcomputer chip; and the boosting chip is also connected with the output end of the second MOS tube and used for receiving the switch control signal.
Further, the power amplifier also comprises an audio circuit which is connected with the power amplifier and used for inputting external audio signals.
Further, the power amplifier includes:
the power amplifier chip is provided with a plurality of pins, wherein the audio input pin of the power amplifier chip receives the external audio signal; the mute signal pin of the power amplifier chip is correspondingly connected with the mute signal pin of the singlechip chip and is used for receiving the mute signal; the I2C or Uart pin of the power amplifier chip is correspondingly connected with the I2C or Uart pin of the singlechip chip for communication between the I2C or Uart pin and the singlechip chip; the boosting electrical signal pin of the power amplifier chip is correspondingly connected with the boosting electrical signal pin of the boosting chip and used for receiving a boosted voltage signal;
the L C filter circuit is bridged between two power amplifier signal output pins of the power amplifier chip, is used for filtering the amplified high-frequency carrier wave and detecting a useful audio signal to the loudspeaker, and comprises two inductors, two capacitors and two resistors, wherein one of the inductors, the resistor and the capacitor is mutually connected in series between one power amplifier signal output pin of the power amplifier chip and the ground, and the other inductor, the resistor and the capacitor are mutually connected in series between the other power amplifier signal output pin of the power amplifier chip and the ground.
Further, the signal sampling feedback circuit includes:
the transformer is provided with a primary coil and two secondary coils, wherein two ends of the primary coil of the transformer are respectively connected with the inductor in the L C filter circuit;
and the anodes of the two detection rectifier diodes are respectively connected with the two secondary windings of the transformer, and the cathodes of the two detection rectifier diodes are connected and connected to the signal sampling feedback pin of the single chip microcomputer chip.
The utility model provides a power management system has both taken into account the charge efficiency of group battery module, has also taken into account the effect of speaker broadcast music. Due to the real-time change of the music signal, the power signal collected by the signal sampling feedback circuit also changes in real time, and the single chip microcomputer circuit adjusts the output voltage of the booster circuit in real time according to the collected power signal, so that the output power of the power amplifier is adjusted, and the maximization of the working efficiency of the sound system is realized. Meanwhile, the single chip microcomputer circuit also judges whether the external power supply is overloaded according to the input current, so that a PWM signal is output to modulate the voltage duty ratio, and the charging current of the battery pack module is further adjusted.
Drawings
In order to illustrate the solution of the present invention more clearly, the drawings needed for describing the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a diagram of a conventional portable intelligent audio power management system;
fig. 2 is a block diagram of a power management system for a rechargeable smart audio device according to an embodiment of the present invention;
fig. 3 the embodiment of the present invention provides a specific circuit diagram of a rechargeable intelligent audio power management system.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "including" and "having," and any variations thereof, in the description and claims of the present invention and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and in the claims, or in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the related drawings.
The embodiment of the utility model provides an intelligence stereo set power management system, as shown in fig. 2 for speaker 110 supplies power, with outside received audio signal enlargies and broadcasts away, it includes power input interface 101, charging circuit 102, group battery module 103, switch circuit 104, boost circuit 105, power amplifier 106, singlechip circuit 107, audio circuit 108, signal sampling feedback circuit 109, speaker 110 and switch keying circuit 111.
The charging circuit 102 receives an external power through the power input interface 101 to charge the battery module 103. The switch circuit 104 is connected to the battery pack module 103, and is used to turn on or off the power supply of the entire smart audio. The boosting circuit 105 is connected to the switching circuit 104, and is configured to boost the voltage of the battery module 103 when the switching circuit 104 is turned on. The power amplifier 106 is connected between the booster circuit 105 and the speaker 110, and amplifies the received audio signal and plays it through the speaker 110. The audio circuit 108 is connected to the power amplifier 106 and configured to input an external audio signal, in this embodiment, the audio signal may be transmitted through Wifi, bluetooth, or the like, and is not limited thereto. The signal sampling feedback circuit 109 is connected to the power amplifier 106, and is configured to collect a power signal of the power amplifier 106 in real time. The single chip circuit 107 is connected to the charging circuit 102, the switching circuit 104, the voltage boost circuit 105, the power amplifier 106 and the signal sampling feedback circuit 109, and adjusts the voltage boost of the voltage boost circuit 105 in real time according to the real-time power signal fed back by the signal sampling feedback circuit 109 through Uart or I2C communication, so as to adjust the power output of the power amplifier 106 to match the size of the music played by the speaker 110. Meanwhile, the single chip circuit 107 determines whether the external power supply is overloaded according to the current magnitude of the power input interface 101, and if the external power supply is overloaded, a PWM (Pulse Width Modulation) signal is output to the charging circuit 102, so as to adjust the magnitude of the charging current and control the charging time of the battery pack module 103; if no overload occurs, the original charging current is maintained. Meanwhile, the switch key circuit 111 is connected to the single chip circuit 107 for inputting a user switch instruction, and the single chip circuit 107 controls the switch circuit 104 to be turned on or off according to the user switch instruction. When the switch key circuit 111 is pressed by a user, the single chip circuit 107 outputs a Mute (Mute) signal to the power amplifier 106 instantly, so that the power amplifier 106 is turned off for 1-2 seconds momentarily, and noise of the on-off current is avoided.
The speaker 110 converts the received audio signal into a music electrical signal to be played, and the size of the music signal changes in real time, so that the actual power consumption of the power amplifier 106 changes in real time. When the sound of the music played by the speaker 110 is large, the power amplifier 106 needs large output power, and then the single chip circuit 107 detects that the external power supply is overloaded, adjusts the duty ratio of the output PWM waveform, and reduces the charging current of the charging circuit 102 to the battery pack module 103. On the contrary, when the music sound played by the speaker 110 is small, the power amplifier 106 needs small output power, and then the single chip circuit 107 detects that the external power supply is not overloaded, and does not need to adjust the duty ratio of the output PWM waveform, and then the charging circuit 102 maintains the original charging current.
The power management system provided by the present embodiment considers both the charging efficiency of the battery module 103 and the effect of the speaker 110 playing music. Due to the real-time change of the music signal, the power signal collected by the signal sampling feedback circuit 109 also changes in real time, and the single chip circuit 107 adjusts the output voltage of the booster circuit 105 in real time according to the collected power signal, so as to adjust the output power of the power amplifier 106, thereby maximizing the working efficiency of the sound system.
In the real-time mode, the switch of the whole sound system is determined by a user, the user outputs a power-on and power-off signal to the single chip circuit 107 through the switch key circuit 111, and when the single chip circuit 107 receives the power-on signal, the switch circuit 104 is controlled to be started to work, so that the sound system can normally play music; when the single chip microcomputer 107 receives the shutdown signal, the switching circuit 104 is controlled to turn off the power supply, and the sound system does not play music and only charges the battery pack module 103. In this real-time mode, the switch key circuit 111 is a switch, and when the switch is pressed by a user, a current noise of the on/off operation is generated in the system, so that the single chip circuit 107 outputs a mute signal to the power amplifier 106, so that the power amplifier 106 can be turned off for 1 to 2 seconds, and the harsh current noise is prevented from being played by the speaker 110.
In the real-time mode, the charging circuit 102 of the single chip computer chip U1. with a plurality of pins in the single chip computer circuit 107 comprises two first MOS transistors Q1 and Q2, a plurality of resistors R1, R2, R3, R4, R5, R6, R7 and R8, a plurality of capacitors C1, C2 and C3, a diode D1 and a first inductor L1.
In the real-time mode, the resistors R, R and R play a role of current limiting and voltage dividing, the singlechip chip U outputs a PWM signal through the pin 1 and the pin 2 to control the first MOS tube Q and the gate of the Q, so as to control the voltage duty ratio and control the magnitude of charging current, one end of the first inductor 1 is connected with the first diode Q, the other end of the first diode Q is connected with a pin 7 of the singlechip chip U through the resistor R, one end of the resistor R is connected with a singlechip chip U10, one end of the singlechip resistor R is connected with a singlechip resistor R, the other end of the resistor R is connected with a resistor R, a resistor R and a resistor R, the resistor R and the resistor R are connected in series with a pin 1 and a pin 2 of the singlechip chip U, and the first resistor R and the resistor R are connected in series with a pin 1 and a pin 2 of the singlechip chip U, and the resistor R are connected in series with a resistor R and a resistor D, and a resistor R are connected in series with a resistor D, and a resistor R and a resistor D, and a resistor R are connected between the singlechip chip R and a resistor D, and a resistor R are connected in series between the singlechip chip.
In the real-time mode, the battery pack module 103 comprises a battery pack B1, the resistor R5 is connected with the anode of the battery pack B1, and the charging constant voltage value is finely adjusted by the single chip microcomputer chip U1. The capacitor C3 is connected in parallel with the battery B1 and is used for filtering when charging the battery B1. Resistor R6 is used to regulate the output charging current.
Meanwhile, the capacitor C4 is a filter capacitor, is connected between an external input power Vcc and the ground, and is used for filtering the input power Vcc and supplying power to the single chip microcomputer chip U1, and the ground terminal of the capacitor C4 is connected with the pin 5 of the single chip microcomputer chip U1. The resistors R9 and R10 are connected in series with each other and in parallel with the capacitor C4, and the resistor R12 is also connected in parallel with the capacitor C4. In the real-time mode, the capacitor C4 is bridged between a pin 3 and a pin 5 of the single chip microcomputer chip U1, the capacitor C5 is connected with the resistor R10 in parallel, and the resistor R11 is connected between the common end of the resistors R9 and R10 and a pin 4 of the single chip microcomputer chip U1. The resistors R9 and R10 form a voltage division circuit, divide an input power supply Vcc into proper voltage values, supply power to the single chip microcomputer chip U1 through the current-limiting capacitor C5 and the current resistor R11, and provide stable reference voltage through internal power supply voltage stabilization. In the real-time mode, the monolithic chip U1 senses the magnitude of the current of the external power supply Vcc through the pin 4, and outputs the PMW wave through the pins 1 and 2. Therefore, pin 4 serves as an external power current sensing pin of the monolithic chip U1.
The capacitor C6 is connected between the U1 pin 6 of the singlechip chip and the cathode of the battery pack B1 and is grounded; the capacitor C7 is connected between the U1 pin 7 of the singlechip chip and the cathode of the battery pack B1 and is grounded; the capacitor C8 is connected between the U1 pin 8 of the singlechip chip and the negative electrode of the battery pack B1 and is grounded. The resistor R12 is connected in parallel with the capacitor C6.
The pin 11 and the pin 12 of the monolithic chip U1 are used as an I2C or Uart interface to adjust the output voltage of the voltage boost circuit 105, and the pin 14 is used as a switch control pin to output a switch control signal (Power _ STBY) to the switch circuit 104 for turning on or off the Power signal of the audio system. Meanwhile, the pin 15 of the singlechip chip U1 is used as a Mute signal pin for outputting a Mute signal (Mute). The pin 13 of the single chip U1 is used as a signal sampling feedback pin, connected to the signal sampling feedback circuit 109, and used for collecting and receiving the power signal fed back by the power amplifier 106 in real time.
The key switch circuit 111 includes a key S1 connected to the pin U1 of the one-chip microcomputer chip through a resistor R17, and when the user wants to turn on the audio system to play music, the key S1 is triggered, and the one-chip microcomputer chip U1 receives a power-on command and transmits the power-on command to the switch circuit 104 through the pin 14; on the contrary, when the user wants to stop playing music, the button S1 is also triggered, and the one-chip microcomputer circuit 107 receives the power-off command, and transmits the power-off command to the switch circuit 104 through the pin 14.
The switch circuit 104 comprises a triode Q3, a second MOS tube Q4, resistors R13, R14, R15 and R16, and capacitors C9 and C10. The base of the triode Q3 is connected with the pin 14 of the monolithic chip U1 through a resistor R13 for receiving a power-on/off signal, the emitter thereof is grounded, and the collector thereof is connected with the gate of the second MOS transistor Q4 through a resistor R15. The resistor R14 is connected in parallel with the capacitor C9 and is connected across the base and emitter of the transistor Q3. The resistor R16 is connected in parallel with the capacitor C10 and is connected across the gate and the output of the second MOS transistor Q4. In the real-time mode, the input end of the second MOS tube Q4 is connected with the positive electrode of the battery pack B1, when the key S1 is pressed, the pin 16 of the single chip microcomputer chip U1 is in short circuit with the ground for 1 second, and the pin 14 outputs high level, the second MOS tube Q4 is conducted, and the whole sound system supplies power; similarly, when the button S1 is pressed again and the ground is shorted again, the sound system turns off the power supply.
The booster circuit 105 comprises a booster chip U with a plurality of pins, a plurality of resistors R, a plurality of capacitors C, R, C and an inductor 2, wherein the resistors R and the capacitors C are connected in series between a booster chip pin 1 and a pin 13, the inductor 2 is connected between the booster chip U pin 1 and a pin 12, the resistors R and the capacitors C are connected in series between the booster chip U pin 1 and the ground, the capacitors C, C and C are connected in parallel between the booster chip U pin 12 and the ground, the pin 12 of the booster chip U is simultaneously connected with the battery B and the output end of a second MOS transistor Q in the switch circuit 104, the resistors R and R are connected in series with each other and then connected in parallel between the booster chip U pin 2 and the ground with the capacitor C, the capacitor C is connected between the booster chip U pin 3 and the ground, the capacitor C is connected between the booster chip U pin 4 and the ground, the resistors C and the resistors R are connected in parallel with the resistors R and R in series between the booster chip U pin 8 and the ground after being connected in series with the booster chip U pin 5 as a common terminal of the booster chip R and the booster chip R, the booster chip U pin 6, the booster chip U pin is connected in parallel between the booster chip U pin 11 and the booster chip U pin 11, the booster chip I chip, the booster chip I pin 11, the booster chip U pin is connected in parallel between the single chip and the booster chip I chip, the booster chip, the single chip, the booster chip I chip, the single chip I.
The power amplification circuit 106 comprises a power amplification chip U with a plurality of pins, a plurality of resistors R, a plurality of capacitors C, R, C and two inductors 3, 4, wherein the pins 1, 15, 22, 25, 28, 33 of the power amplification chip U are all grounded, the pins 2, 3 are connected with the ground through the capacitors C, the pins 4, 5 are used as audio input pins of the power amplification chip U and are respectively connected with an audio circuit 108 through the capacitors C, C for receiving audio signals transmitted by the audio circuit 108, the pin 6 of the power amplification chip U is connected with the pin 11 through the capacitor C, the pin 7 is connected with the pin 11 through the resistors R, R in series, the pin 8 is connected with the common end of the resistors R, the pins 9, 10, 11 are connected with the ground simultaneously, the pin 12 is used as a Mute signal pin of the power amplification chip U and is connected with a Mute signal 15 of the power amplification chip U through the resistor R, for receiving a Mute signal (Mute) output from the single chip U (Mute) through the single chip U, the single chip U is connected with a common end of the single chip 12 and the ground, the amplifier C, the capacitor C, the pin 13 is connected with the pin 14, the pin 14 is connected with the pin 14, the pin of the inductor C, the power amplification chip U, the pin 14, the pin is connected with the pin 14, the pin is connected with the pin 14, the pin 14, the pin of the pin, the pin is connected with the capacitor C, the pin 14, the pin of the pin 14, the pin 14, the pin of the pin 14, the pin is connected with the pin 14, the pin of the pin, the.
In the real-time mode, the loudspeaker 110 is bridged between the inductors L3 and L4, the resistor R31 is used as a boosting electrical signal pin of the power amplifier chip U3, is correspondingly connected with the capacitor C41 in series, is connected with the capacitors C39 and C40 in parallel, is connected with the pins 31 and 32 of the power amplifier chip U3, is connected with the pin 8 of the boosting chip U2, and is also used for receiving the high voltage output by the boosting circuit 105.
In the real-time mode, the capacitors C24 and C25 are blocking coupling capacitors, the inductor L, the resistor R29, the capacitor 35, the inductor L, the resistor R30, and the capacitor C37 form a L C filter circuit, which is bridged between the pins 20 and 30 of the power amplifier chip U3, and filters out the amplified high-frequency carrier, so as to detect a useful audio signal, and meanwhile, the speaker 110 converts the electrical signal into an audio signal to be played.
The signal sampling feedback circuit 109 comprises a transformer T, two diodes D2 and D3, a plurality of resistors R32, R33, R34 and R35 and a plurality of capacitors C42, C43 and C44, wherein the capacitor C43 and the resistor R34 are connected in series between one end of a primary coil of the transformer T and an inductor L3 of the power amplifier circuit 106, the capacitor C44 and the resistor R35 are connected in series between the other end of the primary coil of the transformer T and an inductor L4 of the power amplifier circuit 106, the transformer T is provided with two secondary coils, the two secondary coils are respectively connected with the diode D2 and the diode D3 and are connected with a pin 13 of the singlechip chip U1 through a resistor R33, the resistor R32 and the capacitor C42 are mutually connected in parallel between the pin 13 of the singlechip chip U1 and the ground, and meanwhile, the common end of the two secondary coils of the transformer T is grounded.
In the real-time mode, the signal sampling feedback circuit 109 dynamically collects the power actually consumed by the speaker 110 and outputs the power to the single chip U1, the single chip U1 analyzes and judges the power consumed by the sound, so as to judge the output power required by the speaker 110, further judge the voltage value required by the power amplifier circuit 106, and then control the voltage value output by the booster circuit 105 in real time through the I2C or Uart communication of the pins 11 and 12 of the single chip U1, so as to maximize the working efficiency of the sound system.
In the real-time mode, firstly, an external power supply Vcc is connected with a pulse width modulation circuit composed of first MOS transistors Q1 and Q2, and pins 1 and 2 of a single chip U1 output pulse width modulation signals PWM to control a voltage duty ratio, thereby controlling a charging current. The resistor R6 connected with the pin 9 of the singlechip chip U1 controls the output current and provides proper voltage and current for charging the battery pack B1; resistor R4 connected to pin 10 sets the cutoff charging voltage value.
Secondly, the capacitor C43, the resistor R34, the capacitor C44 and the resistor 35 are isolated and coupled by the capacitors C43 and C44 respectively after sampling attenuation along with power amplifier output, and input into the transformer T, and converted into signals with proper level values through the transformer T. Because of the signal change of the primary input end of the transformer T, the voltage coupled to the two windings of the secondary winding can also change along with the change, the voltage is rectified into direct current voltage through the detection formed by the diodes D2 and D3, filtered by the voltage division circuit formed by the resistors R32 and R33 and the capacitor C42, and the voltage value changing along with the signal transient state is output to be sampled and analyzed by the analog-digital converter arranged in the single chip microcomputer chip U1, so that the dynamic change state of the size of the output signal of the power amplifier circuit 106 is judged.
Thirdly, the power consumed by the sound is analyzed and judged according to the sampling data detected by the pin 4 and the pin 13 of the monolithic chip U1, so that the output power required by the loudspeaker 110 is judged, the voltage value required by the power amplifier can be further judged, then the voltage value of the booster circuit 105 is controlled to dynamically change along with the music signal in real time through the pins 11 and 12 of the monolithic chip U1, and whether the output of the external power supply Vcc is overloaded can be judged according to the voltage change amplitude detected by the pin 4 of the monolithic chip U1. If so, the singlechip chip U1 pin 1, 2 outputs PWM signal control voltage duty ratio, reduces the charging current, otherwise maintains the original normal charging current.
Then, the single chip U1 adopts the I2C line connected with the power amplifier chip U3 to modulate the DSP in the power amplifier chip U3, modulate frequency response, automatic gain control and the like according to the collected data, thereby improving the sound quality of the sound and reducing the distortion degree.
Finally, the single chip U1 dynamically samples the power actually consumed by the speaker 110 according to a sampling circuit composed of the diode D2, the resistors R33, R34, and R35, analyzes and judges the power consumed by the speaker 110, thereby judging the output power required by the speaker 110, further judging the voltage value required by the power amplifying circuit 106, and then controls the voltage value output by the boost chip U2 in real time through the I2C or Uart port of the pins 11 and 12 of the single chip U1, so as to maximize the power efficiency of the sound system.
In summary, in the rechargeable intelligent audio power management system provided by this embodiment, the sampling feedback circuit 109 collects and outputs the real-time power of music played by the audio to the single chip circuit 107, so that the single chip circuit 107 controls the boost value of the boost circuit 105, and further controls the power of the power amplification circuit 106, thereby maximizing the power management efficiency of the audio system.
It is to be understood that the above-described embodiments are only some of the embodiments of the present invention, and not all of the embodiments, and the preferred embodiments of the present invention are shown in the drawings, but not limited to the scope of the present invention. The present invention may be embodied in many different forms and, on the contrary, these embodiments are provided so that this disclosure will be thorough and complete. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and modifications can be made, and equivalents may be substituted for elements thereof. All utilize the equivalent structure that the content of the utility model discloses a specification and attached drawing was done, direct or indirect application is in other relevant technical field, all is in the same way the utility model discloses within the patent protection scope.
Claims (10)
1. The utility model provides a chargeable intelligent sound power management system for give the power supply of intelligent sound, with received external audio signal amplification and broadcast away through the speaker, it includes power input interface, charging circuit, battery pack module, switch circuit, boost circuit and power amplifier, wherein, charging circuit receives external power supply by power input interface and gives the battery pack module charges, switch circuit is used for turning on or turn off the power supply of intelligent sound, boost circuit with the voltage of battery pack module is carried out the boost, and is exported to power amplifier, its characterized in that, chargeable intelligent sound power management system still includes:
the signal sampling feedback circuit is connected with the power amplifier and is used for acquiring the power signal of the power amplifier in real time; and
the single chip microcomputer circuit is connected with the charging circuit, the switching circuit, the booster circuit and the signal sampling feedback circuit;
the single chip microcomputer circuit is a single chip microcomputer chip with a plurality of pins, outputs a PWM signal to the charging circuit according to the current of the power input interface, and is used for adjusting the charging current and controlling the charging time of the battery pack module; and simultaneously, the output voltage of the booster circuit is controlled according to the real-time power signal acquired by the signal sampling feedback circuit, so that the output voltage changes in real time along with the change of the power amplifier.
2. The power management system of a rechargeable intelligent sound box according to claim 1, further comprising a switch button circuit connected to the single chip microcomputer circuit for outputting a user on/off command.
3. The power management system of rechargeable smart audio according to claim 2, wherein the single chip circuit is connected to the power amplifier, and when the switch button circuit outputs an on/off signal, the single chip circuit outputs a mute signal to the power amplifier, and the power amplifier is turned off instantly to avoid interference from on/off noise.
4. The power management system of a rechargeable smart audio device of claim 1, wherein the charging circuit comprises two first MOS transistors forming a PWM switching circuit, gates of which are respectively connected to the PWM signal pins of the one-chip microcomputer chip, for receiving the PWM signal outputted from the one-chip microcomputer chip, thereby adjusting the duty ratio of the output voltage.
5. The rechargeable smart audio power management system of claim 1, further comprising:
the two voltage dividing resistors are used for dividing the external power received by the power input interface into proper voltage values;
the current limiting resistor is connected with the common node ends of the two voltage dividing resistors and the external power supply current sensing pin of the single chip microcomputer chip; and
and the current-limiting capacitor is connected with one of the voltage-dividing resistors in parallel and is used for providing stable reference voltage.
6. The rechargeable smart audio power management system of claim 1, wherein the switching circuit comprises:
the base electrode of the triode is connected with the switch control pin of the singlechip chip and is used for receiving a starting or closing signal, and the emitting electrode of the triode is grounded; and
and the grid electrode of the second MOS tube is connected with the collector electrode of the triode, the input end of the second MOS tube is connected with the battery pack module, and the output end of the second MOS tube is used for outputting a switch control signal.
7. The system according to claim 6, wherein the boost circuit comprises a boost chip having a plurality of pins, wherein the boost signal pin of the boost chip is connected to the power amplifier for outputting a boosted voltage signal; the boosting chip I2C or Uart pin is connected with the I2C or Uart pin corresponding to the single chip microcomputer chip and is used for adjusting boosting according to the boosting control signal of the single chip microcomputer chip; and the boosting chip is also connected with the output end of the second MOS tube and used for receiving the switch control signal.
8. The rechargeable smart audio power management system of claim 7 further comprising an audio circuit coupled to said power amplifier for inputting external audio signals.
9. The rechargeable smart audio power management system of claim 8, wherein the power amplifier comprises:
the power amplifier chip is provided with a plurality of pins, wherein the audio input pin of the power amplifier chip receives the external audio signal; the mute signal pin of the power amplifier chip is correspondingly connected with the mute signal pin of the singlechip chip and is used for receiving the mute signal; the I2C or Uart pin of the power amplifier chip is correspondingly connected with the I2C or Uart pin of the singlechip chip for communication between the I2C or Uart pin and the singlechip chip; the boosting electrical signal pin of the power amplifier chip is correspondingly connected with the boosting electrical signal pin of the boosting chip and used for receiving a boosted voltage signal;
the L C filter circuit is bridged between two power amplifier signal output pins of the power amplifier chip, is used for filtering the amplified high-frequency carrier wave and detecting a useful audio signal to the loudspeaker, and comprises two inductors, two capacitors and two resistors, wherein one of the inductors, the resistor and the capacitor is mutually connected in series between one power amplifier signal output pin of the power amplifier chip and the ground, and the other inductor, the resistor and the capacitor are mutually connected in series between the other power amplifier signal output pin of the power amplifier chip and the ground.
10. The rechargeable smart audio power management system of claim 9, wherein the signal sampling feedback circuit comprises:
the transformer is provided with a primary coil and two secondary coils, wherein two ends of the primary coil of the transformer are respectively connected with the inductor in the L C filter circuit;
and the anodes of the two detection rectifier diodes are respectively connected with the two secondary windings of the transformer, and the cathodes of the two detection rectifier diodes are connected and connected to the signal sampling feedback pin of the single chip microcomputer chip.
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|---|---|---|---|
| CN201921197878.3U CN211209910U (en) | 2019-07-26 | 2019-07-26 | Chargeable intelligent sound power management system |
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| CN201921197878.3U CN211209910U (en) | 2019-07-26 | 2019-07-26 | Chargeable intelligent sound power management system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112312275A (en) * | 2019-07-26 | 2021-02-02 | 深圳市三诺声智联股份有限公司 | Chargeable intelligent sound power management system |
| CN112714382A (en) * | 2020-12-28 | 2021-04-27 | Tcl通力电子（惠州）有限公司 | Power self-adaptive circuit, control method and electronic equipment |
-
2019
- 2019-07-26 CN CN201921197878.3U patent/CN211209910U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112312275A (en) * | 2019-07-26 | 2021-02-02 | 深圳市三诺声智联股份有限公司 | Chargeable intelligent sound power management system |
| CN112714382A (en) * | 2020-12-28 | 2021-04-27 | Tcl通力电子（惠州）有限公司 | Power self-adaptive circuit, control method and electronic equipment |
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Effective date of registration: 20220317 Address after: 518000 area 101A, 401, No. 15, Zhongfu Road, tangxiayong community, Yanluo street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN 3NOD DIGITAL TECHNOLOGY Co.,Ltd. Address before: 518000 floor 26-01, sannuo wisdom building, 3388 Binhai Avenue, Binhai community, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN 3NOD ACOUSTICLINK Co.,Ltd. |