CN212695720U - Dynamic booster circuit, electronic equipment and sound box system - Google Patents
Dynamic booster circuit, electronic equipment and sound box system Download PDFInfo
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- CN212695720U CN212695720U CN202020809500.0U CN202020809500U CN212695720U CN 212695720 U CN212695720 U CN 212695720U CN 202020809500 U CN202020809500 U CN 202020809500U CN 212695720 U CN212695720 U CN 212695720U
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Abstract
The utility model relates to a boost circuit technical field especially relates to a developments boost circuit, electronic equipment and audio amplifier system. The dynamic boost circuit includes: the device comprises a boosting unit and a dynamic feedback unit; the boosting unit is used for receiving the power supply voltage input by the power supply unit, boosting the power supply voltage and outputting the boosted power supply voltage to the power amplification unit; the dynamic feedback unit is used for receiving the power amplifier feedback voltage fed back by the power amplifier unit, converting the power amplifier feedback voltage into a power amplifier change signal and outputting the power amplifier change signal to the boosting unit; and the boosting unit is also used for receiving the power amplifier change signal, dynamically boosting the power supply voltage according to the power amplifier change signal, and outputting the dynamically boosted power supply voltage to the power amplifier unit. The endurance time of the equipment is effectively and greatly improved under the condition that the capacities of the batteries are the same; otherwise, under the state of the same duration, the battery with smaller capacity can be used for supplying power.
Description
Technical Field
The utility model relates to a boost circuit technical field especially relates to a developments boost circuit, electronic equipment and audio amplifier system.
Background
The mainstream battery power supply sound equipment in the market at present has the main application scene that the working state is the low volume playing state, but the product design usually supplies electric energy according to the working voltage output by rated power; namely, the quiescent current consumed by the power amplifier is relatively large in the state; especially, the larger the rated output power of the loudspeaker box is, the static consumed current is not negligible, so that the battery capacity is greatly wasted on the static consumed current of the power amplifier. In addition, the manufacturing cost of the dynamic booster circuit on the market is high, a multi-path comparator is required to be combined with an MCU (Micro Control Unit) for Control, and the product competitiveness is low.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a dynamic booster circuit, an electronic apparatus, and a sound box system, which are capable of increasing the endurance of low-capacity battery.
In order to achieve the above object, the utility model provides a dynamic voltage boosting circuit, dynamic voltage boosting circuit includes: the device comprises a boosting unit and a dynamic feedback unit; wherein the content of the first and second substances,
the input end of the boosting unit is connected with the output end of the power supply unit, the output end of the boosting unit is connected with the input end of the power amplification unit, the input end of the dynamic feedback unit is connected with the feedback end of the power amplification unit, and the output end of the dynamic feedback unit is connected with the feedback end of the boosting unit;
the boosting unit is used for receiving the power supply voltage input by the power supply unit, boosting the power supply voltage and outputting the boosted power supply voltage to the power amplification unit;
the dynamic feedback unit is used for receiving the power amplifier feedback voltage fed back by the power amplifier unit, converting the power amplifier feedback voltage into a power amplifier change signal and outputting the power amplifier change signal to the boosting unit;
the boosting unit is further used for receiving the power amplifier change signal, dynamically boosting the power supply voltage according to the power amplifier change signal, and outputting the dynamically boosted power supply voltage to the power amplifier unit.
Preferably, the dynamic feedback unit includes: the feedback receiving subunit, the voltage division filtering subunit and the conversion subunit; wherein the content of the first and second substances,
the input end of the feedback receiving subunit is connected with the feedback end of the power amplifier unit, the output end of the feedback receiving subunit is connected with the input end of the voltage division filtering subunit, the output end of the voltage division filtering subunit is connected with the input end of the conversion subunit, and the output end of the conversion subunit is connected with the feedback end of the voltage boosting unit.
Preferably, the feedback receiving subunit includes a diode, an anode of the diode is connected to the feedback end of the power amplifying unit, and a cathode of the diode is connected to the input end of the voltage dividing and filtering subunit.
Preferably, the pressure-dividing filter subunit includes: a first resistor and a first capacitor; wherein the content of the first and second substances,
the second end of the first resistor is connected with the output end of the feedback receiving subunit, the first end of the first resistor is connected with the first end of the first capacitor, the second end of the first capacitor is grounded, the first end of the first resistor is connected with the input end of the converting subunit, and the second end of the first capacitor is further connected with the other input end of the converting subunit.
Preferably, the converting subunit includes a third resistor, a fourth resistor, and a triode; wherein the content of the first and second substances,
the first end of the third resistor is connected with the output end of the voltage division filtering subunit and the base electrode of the triode, the second end of the third resistor is connected with the emitting electrode of the triode, the emitting electrode of the triode is grounded, the collecting electrode of the triode is connected with the second end of the fourth resistor, and the first end of the fourth resistor is connected with the feedback end of the boosting unit.
Preferably, the boosting unit comprises a boosting control subunit, a first filtering subunit and a second filtering subunit; wherein the content of the first and second substances,
the input end of the first filtering subunit is connected with the output end of the power supply unit, and the output end of the first filtering subunit is connected with the input end of the boost control subunit;
the first output end of the boost control subunit is connected with the first input end of the power amplification unit, the feedback end of the boost control subunit is connected with the output end of the dynamic feedback unit, and the second output end of the boost control subunit is connected with the second input end of the power amplification unit and the input end of the second filter subunit;
one end of the first filtering subunit and one end of the second filtering subunit are grounded.
Preferably, the boost control subunit includes a boost control chip, a fourteenth pin of the boost control chip is connected to the output end of the dynamic feedback unit, a third pin of the boost control chip is connected to the first input end of the power amplification unit, and a eleventh pin of the boost control chip is connected to the output end of the first filtering subunit.
Preferably, the boost control subunit further comprises: the first end of the fifth resistor, the first end of the sixth resistor and the first end of the seventh resistor are connected with the output end of the first filtering subunit, the second end of the fifth resistor, the second end of the sixth resistor and the second end of the seventh resistor are connected, and the second end of the seventh resistor is connected with the sixth pin of the boost control chip.
In addition, in order to achieve the above object, the present invention also provides an electronic device, which includes the dynamic voltage boosting circuit as described above.
Furthermore, in order to achieve the above object, the present invention further provides a speaker system, wherein the speaker system comprises the dynamic boost circuit as described above.
The utility model discloses a dynamic boost circuit is provided, dynamic boost circuit includes: the device comprises a boosting unit and a dynamic feedback unit; the input end of the boosting unit is connected with the output end of the power supply unit, the output end of the boosting unit is connected with the input end of the power amplification unit, the input end of the dynamic feedback unit is connected with the feedback end of the power amplification unit, and the output end of the dynamic feedback unit is connected with the feedback end of the boosting unit; the boosting unit is used for receiving the power supply voltage input by the power supply unit, boosting the power supply voltage and outputting the boosted power supply voltage to the power amplification unit; the dynamic feedback unit is used for receiving the power amplifier feedback voltage fed back by the power amplifier unit, converting the power amplifier feedback voltage into a power amplifier change signal and outputting the power amplifier change signal to the boosting unit; the boosting unit is further used for receiving the power amplifier change signal, dynamically boosting the power supply voltage according to the power amplifier change signal, and outputting the dynamically boosted power supply voltage to the power amplifier unit. The endurance time of the equipment is effectively and greatly improved under the condition that the capacities of the batteries are the same; otherwise, under the state of the same duration, the battery with smaller capacity can be used for supplying power.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first embodiment of the dynamic boost circuit of the present invention;
fig. 2 is a schematic circuit diagram of a boosting unit according to a second embodiment of the dynamic boosting circuit of the present invention;
fig. 3 is a schematic circuit diagram of a dynamic feedback unit according to a second embodiment of the dynamic boost circuit of the present invention;
fig. 4 is a schematic circuit diagram of a dynamic feedback unit according to a third embodiment of the dynamic boost circuit of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) | |
| D1 | Diode with a high-voltage source | AMP | Power amplifier input terminal | |
| C1~C15 | First to fifteenth capacitors | VCC | Battery power supply terminal | |
| | Triode transistor | 100 | Boosting | |
| L1 | Inductance | |||
| 200 | Power supply unit | |||
| R1~R15 | First to | 300 | Power amplifier unit | |
| AGND | | 400 | Dynamic feedback unit | |
| PGND | Power | 401 | Feedback receiving subunit | |
| SW | | 402 | Pressure-dividing and filtering wave subunit | |
| BST | Boost | 403 | Converting subunit | |
| SDR | Grid driving pin | AMP_FB1 | A first feedback terminal | |
| OUT | Output pin | AMP_FB1 | Second feedback terminal | |
| EN | | 103 | Boost control subunit | |
| CLDR | Current-limiting switch driving pin | 101 | A first filtering subunit | |
| SENSE | Sampling foot | 102 | A second filter subunit | |
| SS | Soft start driving foot | U1 | Boost control chip | |
| FB | Feedback foot | Q2 | MOS tube | |
| COMP | Compensation foot | CE1~CE2 | First polarity capacitor to second polarity capacitor | |
| VDD | Voltage input pin | D2 | Bipolar tube | |
| IN | Input foot |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope of the present invention.
The utility model provides a dynamic boost circuit, refer to fig. 1, fig. 1 is the utility model discloses the structural schematic of the first embodiment of dynamic boost circuit.
The dynamic boost circuit includes: a booster unit 100 and a dynamic feedback unit 400; the input end of the voltage boosting unit 100 is connected with the output end of the power supply unit 200, the output end of the voltage boosting unit 100 is connected with the input end of the power amplification unit 300, the input end of the dynamic feedback unit 400 is connected with the feedback end of the power amplification unit 300, and the output end of the dynamic feedback unit 400 is connected with the feedback end of the voltage boosting unit 100.
The boosting unit 100 is configured to receive the power supply voltage input by the power supply unit 200, boost the power supply voltage 200, and output the boosted power supply voltage to the power amplification unit 300.
It is easy to understand that the power supply unit 200 may be a battery, a power board, or a power supply terminal of an ac power source, and in this embodiment, the battery is taken as an example for description, and the dynamic voltage boost circuit is applied to a sound box system powered by the battery in this embodiment.
It is easy to understand that, in this embodiment, in order to avoid the influence of the jump of the input voltage of the power amplifier on the instantaneous output function in the power amplifier unit 300, the power amplifier IC may select a closed-loop power amplifier. The dynamic operating voltage range is determined according to the power amplifier output power and the load required by the power amplifier unit 300, that is, the maximum value and the minimum value of the power supply voltage boosted by the voltage boosting unit 300 are determined, in this embodiment, the voltage boosting output is set to 12-16V.
The dynamic feedback unit 400 is configured to receive the power amplifier feedback voltage fed back by the power amplifier unit 300, convert the power amplifier feedback voltage into a power amplifier change signal, and output the power amplifier change signal to the voltage boosting unit 100.
The boosting unit 100 is further configured to receive the power amplifier change signal, dynamically boost the power supply voltage according to the power amplifier change signal, and output the dynamically boosted power supply voltage to the power amplifier unit 300.
It should be noted that, in a normal state, when the power amplifier feedback voltage does not reach the start control point, the dynamic feedback unit 400 is in a cut-off state, and the voltage boosting unit 100 outputs the voltage to the power amplifier unit 300 with the minimum boosting output. When the power amplifier unit 300 outputs a high power, the power amplifier feedback voltage is large, the dynamic feedback unit 400 is in a saturated state, and the booster unit 100 outputs a maximum boost output to the power amplifier unit 300. When the output power of the power amplifier unit 300 changes, the feedback voltage of the power amplifier changes, the dynamic feedback unit 400 sends a power amplifier change signal, which changes according to the changed feedback voltage of the power amplifier, to the voltage boosting unit 100, the voltage boosting unit 100 performs voltage boosting control according to the changed power amplifier change signal, and outputs the changed boosted voltage to the power amplifier unit 300, so that the dynamic adjustment of the power supply voltage can be realized.
Through the circuit, the utility model, under the condition of the same battery capacity, effectively and greatly improves the playing duration of the sound box; otherwise, under the state of the same duration, a battery with smaller capacity can be used for supplying power; the intelligent power supply of the product can be realized, and the user experience is effectively improved; the product cost is reduced, and the competitiveness of the product in the market is obviously improved.
Based on the utility model discloses a first embodiment proposes the utility model discloses dynamic boost circuit's second embodiment, refers to fig. 2, fig. 3. Fig. 2 is a schematic circuit diagram of a boosting unit according to a second embodiment of the dynamic boosting circuit of the present invention; fig. 3 is a schematic circuit diagram of a dynamic feedback unit according to a second embodiment of the dynamic boost circuit of the present invention.
The dynamic feedback unit 400 includes: a feedback receiving subunit 401, a voltage division filtering subunit 402 and a converting subunit 403.
The input end of the feedback receiving subunit 401 is connected to the feedback end of the power amplifying unit 300, the output end of the feedback receiving subunit 401 is connected to the input end of the voltage division filtering subunit 402, the output end of the voltage division filtering subunit 402 is connected to the input end of the converting subunit 403, and the output end of the converting subunit 403 is connected to the feedback end of the voltage boosting unit 100.
The feedback receiving subunit 401 includes a diode D1, an anode of the diode D1 is connected to the feedback terminal of the power amplifying unit 300, and a cathode of the diode D1 is connected to the input terminal of the voltage division filtering subunit 402. In this embodiment, there are two diodes D1, and in other embodiments, the number of diodes D1 may be adjusted according to actual needs, and is not limited herein.
It should be noted that, the number of feedback samples is selected and controlled according to the number of output channels, in this embodiment, a single channel is adopted, so that a first feedback end AMP _ FB1 is selected at the feedback end of the power amplifier; if the number of the power amplifier output channels is increased, the number of the diodes is only required to be correspondingly increased, and the detection signals are connected in parallel.
The voltage division filtering subunit 402 includes: a first resistor R1 and a first capacitor C1.
The second terminal of the first resistor R1 is connected to the output terminal (cathode of the diode) of the feedback receiving subunit 401, the first terminal of the first resistor R1 is connected to the first terminal of the first capacitor C1, the second terminal of the first capacitor C1 is grounded, the first terminal of the first resistor R1 is connected to the input terminal of the converting subunit 403, and the second terminal of the first capacitor C1 is further connected to the other input terminal of the converting subunit 403.
In other embodiments, the voltage dividing and filtering subunit 402 further includes a second resistor R2 and a second capacitor C2.
It should be noted that adjusting the value of the capacitance parameter of the first capacitor C1 can adjust the boost response speed. When the dynamic booster circuit is applied to a sound box system, the function of adjusting music dynamics can be achieved by adjusting the capacitance parameter.
The converting subunit 403 includes a third resistor R3, a fourth resistor R4, and a transistor Q1.
The first end of the third resistor R3 is connected to the first end of the first capacitor C1, the first end of the first resistor R1 and the base of the transistor Q1, the second end of the third resistor R1 is connected to the emitter of the transistor Q1 and the second end of the first capacitor C1, the emitter of the transistor Q1 is grounded, the collector of the transistor Q1 is connected to the second end of the fourth resistor R4, and the first end of the fourth resistor R4 is connected to the feedback end of the voltage boosting unit 100.
It should be noted that, the power amplifier unit 300 inputs the power amplifier feedback voltage through a dual channel, and under the action of the filtering and voltage dividing unit 402, the voltage between the emitter and the base of the transistor Q1 is changed, so that the transistor Q1 is switched between the cut-off, amplification or on states, and different power amplifier change signals are correspondingly generated and output to the voltage boosting unit 100.
The boosting unit 100 includes a boosting control subunit 103, a first filtering subunit 101, and a second filtering subunit 102.
The input end of the first filtering subunit 101 is connected to the output end of the power supply unit 200 (battery supply end VCC in fig. 2), and the output end of the first filtering subunit 101 is connected to the input end of the boost control subunit 103; a first output end of the boost control subunit 103 is connected to a first input end of the power amplifier unit 300, a feedback end of the boost control subunit 103 is connected to a first end of the fourth resistor R4, and a second output end of the boost control subunit 103 is connected to a second input end of the power amplifier unit 300 and an input end of the second filtering subunit 102;
one end of the first filtering subunit 101 and one end of the second filtering subunit 102 are grounded.
The boost control subunit 103 includes a boost control chip U1, a fourteenth pin (feedback pin FB) of the boost control chip U1 is connected to the first end of the fourth resistor R4, a third pin (output pin OUT) of the boost control chip U1 is connected to the first input end of the power amplifier unit 300, and a eleventh pin (input pin IN) of the boost control chip U1 is connected to the output end of the first filtering subunit 101.
The boost control subunit 103 further includes: a fifth resistor R5, a sixth resistor R6 and a seventh resistor R7, wherein the first end of the fifth resistor R5, the first end of the sixth resistor R6 and the first end of the seventh resistor R7 are connected to the output end of the first filter subunit 101, the second end of the fifth resistor R5, the second end of the sixth resistor R6 and the second end of the seventh resistor R7 are connected, and the second end of the seventh resistor R7 is connected to the sixth pin of the boost control chip U1.
The boost control subunit 103 further includes a MOS transistor Q2, eighth to fifteenth resistors R8 to R15, an inductor L1, and sixth to twelfth capacitors C6 to C12.
A first end of an eighth resistor R8 is connected to a first end of the seventh resistor R7, a second end of the eighth resistor R8 is connected to a fourth pin of the boost control chip U1, and the fourth pin is an enable pin EN; the second end of the eighth resistor R8 is connected with the first end of the ninth resistor R9, and the second end of the ninth resistor R9 is grounded. The first end of the eighth resistor R8 is further connected with an eleventh pin of the boost control chip U1, and the eleventh pin is an input pin IN. The eleventh pin is further connected to a first terminal of a ninth capacitor C9, a second terminal of the ninth capacitor C9 is connected to a second terminal of a tenth capacitor C10, and a second terminal of the ninth capacitor C9 is grounded. The first end of the tenth capacitor C10 is connected to the twelfth pin of the boost control chip U1, and the twelfth pin is the voltage input pin VDD. The sixth pin of the boost control chip U1 is a sampling pin SENSE, the fifth pin is a current limiting switch driving pin CLDR, the fifth pin is connected with the first end of an eleventh resistor R11, and the second end of the eleventh resistor R11 is grounded. The sixteenth pin is an analog grounding pin AGND, and the sixteenth pin is grounded. The ninth, tenth, seventeenth, eighteenth and twenty-second pins are power ground pins PGND. The fifteenth pin is a soft start driving pin SS, the fifteenth pin is connected with a first end of an eighth capacitor C8, and a second end of the eighth capacitor C8 is grounded. A thirteenth pin is a compensation pin COMP, first ends of the thirteenth pin and an eleventh capacitor C11 are connected to a first end of a twelfth capacitor C12, a first end of a thirteenth resistor R13 is connected to a second end of the twelfth capacitor C12, a second end of the eleventh capacitor C11 is connected to a second end of the thirteenth resistor R13, and a second end of the eleventh capacitor C11 and a second end of the thirteenth resistor R13 are grounded. The seventh, eighth, nineteenth, twenty-first and twenty-first pins are switch control pins SW, which are all connected to a path between the second terminal of the inductor L1 and the MOS transistor Q2.
The first pin of the boost control chip U1 is a boost control pin BST, the second pin is an SDR gate drive pin, the first end of the inductor L1 is connected to the second end of the seventh resistor R7, the second end of the inductor L1 is connected to the second end of the sixth capacitor C6, the first end of the sixth capacitor C6 is connected to the first end of the tenth resistor R10, and the second end of the tenth resistor R10 is connected to the first pin. The gate of the MOS transistor Q2 is connected to the second pin, the source of the MOS transistor is connected to the first end of the twelfth resistor R12, and the drain of the MOS transistor Q2 is connected to one end of the second filtering subunit 102. A second terminal of the twelfth resistor R12 is connected to a first terminal of the seventh capacitor C7, and a second terminal of the seventh capacitor C7 is connected to one terminal of the second filtering subunit 102.
It should be noted that the fourteenth pin is connected to the output end of the dynamic feedback unit 400, the fourteenth pin is further connected to the second end of the fourteenth resistor R14 and the first end of the fifteenth resistor R15, the first end of the fourteenth resistor R14 is connected to the power amplifier unit 300, and the second end of the fifteenth resistor R15 is grounded.
It should be understood that in this embodiment, the maximum and minimum boosted supply voltages may be calculated according to a calculation formula of the boost control chip U1, and specifically, may be calculated according to resistance values of the fourth, fourteenth and fifteenth resistors. In this embodiment, the circuit calculation formula is Vout =1.225 (1+ RH/RL).
Then, the minimum output voltage is 1.225 × (1+412/47) = 11.96V.
The maximum output voltage is 1.225 × (1+412/(47| |124)) = 16.03V.
It should be noted that, the present invention adds the converting subunit 403 in the feedback loop of the boost circuit, and the triode Q1 is not conducted in the normal state, and outputs the minimum voltage signal; when the output power is maximum, the power amplifier feedback voltage is increased, the triode Q1 is completely conducted, and a maximum voltage signal is output. The fourteenth pin of the boost control chip U1 receives the voltage signal output by the transistor Q1, and performs boost control according to the voltage signal.
It is easy to understand that the values of the voltage division ratio parameters of the first resistor R1 and the third resistor R2 can be adjusted according to the output power of the power amplifier unit 300. The triode Q1 can work in a cut-off region, an amplification region and a saturation region according to a set value, so that feedback parameters of the booster circuit are controlled, and output voltage control is realized.
It is easy to understand that, in this embodiment, the feedback sampling number and the voltage division ratio parameter value are adjusted to make the power supply to output power ratio of the power amplifier higher; and meanwhile, the audio index is not influenced.
It should be noted that, in this embodiment, in a normal state, when the power amplifier feedback voltage does not reach the start control point, the triode Q1 is not turned on, and the output voltage of the voltage boost unit 100 is 1.225 × 1+412/47) = 11.96V; when the power amplifier outputs high power, the transistor Q1 works in a saturation region, and the output voltage of the voltage boost unit 100 is 1.225 × (1+412/(47| |124)) = 16.03V.
It should be noted that when the output power of the feedback channel of the power amplifier unit 300 becomes larger, the voltage fed back at the first feedback end AMP _ FB1 changes, and is shaped by the diode D2, and the first resistor R1 and the third resistor R3 divide the voltage; the first capacitor C1 filters, real-time signals of the output voltage of the power amplifier are input to the base electrode of the triode Q1, and the triode Q1 is in a cut-off, amplification and saturation region according to the signal intensity according to the conduction principle of the triode; the pin 14 (FB) of the boost control chip U1 will automatically adjust the output voltage due to the change of the feedback voltage; the output voltage range of the booster circuit jumps between 12V and 16V; the power amplifier can obtain corresponding working voltage, and saturation distortion of audio signals can not occur in a large volume state, so that energy conservation is realized, and the requirements of electrical performance indexes are met.
Through the circuit, the utility model, under the condition of the same battery capacity, effectively and greatly improves the playing duration of the sound box; otherwise, under the state of the same duration, a battery with smaller capacity can be used for supplying power; the circuit is simple, the wiring difficulty is low, and the system response speed is fast. The intelligent power supply of the product can be realized, and the user experience is effectively improved; the product cost is reduced, and the competitiveness of the product in the market is obviously improved.
Based on the utility model discloses dynamic boost circuit second embodiment proposes the utility model discloses dynamic boost circuit third embodiment refers to fig. 4, and fig. 4 is the utility model discloses the circuit schematic diagram of the dynamic feedback unit of dynamic boost circuit third embodiment.
In this embodiment, the diode D1 is replaced by a diode D2, so that dual-channel feedback is realized.
The feedback receiving sub-unit 401 comprises a diode D2, a first input terminal of an anode of the diode D2 is connected with a first feedback terminal AMP _ FB1 of the power amplifier unit 300, a second input terminal of an anode of the diode D2 is connected with a second feedback terminal AMP _ FB2 of the power amplifier unit 300, and a cathode of the diode D2 is connected with an input terminal of the voltage division filtering sub-unit 402.
It should be noted that, the number of feedback samples is selected and controlled according to the number of output channels, and in this embodiment, 2 channels are adopted, so that a first feedback end AMP _ FB1 and a second feedback end AMP _ FB2 are selected at the feedback end of the power amplifier; by analogy, if the number of the power amplifier output channels is increased, the number of the diodes is only required to be correspondingly increased, and the detection signals are connected in parallel.
In this embodiment, in order to improve the filtering strength of the voltage division filtering subunit 402, a second resistor R2 and a second capacitor C2 are added, where the voltage division filtering subunit 402 includes: the circuit comprises a first resistor R1, a second resistor R2, a first capacitor C1 and a second capacitor C2.
A second end of the first resistor R1 is connected to a cathode of the diode D2, a first end of the first resistor R1 is connected to a first end of the first capacitor C1 and a second end of the second resistor R2, a second end of the first capacitor C1 is connected to a second end of the second capacitor C2, and a first end of the second capacitor C2 is connected to a first end of the second resistor R2.
It should be noted that adjusting the values of the capacitance parameters of the first capacitor C1 and the second capacitor C2 can adjust the boost response speed. When the dynamic booster circuit is applied to a sound box system, the function of adjusting music dynamics can be achieved by adjusting the capacitance parameter.
The converting subunit 403 includes a third resistor R3, a fourth resistor R4, and a transistor Q1.
The first end of the third resistor R3 is connected to the first end of the second capacitor C2 and the base of the transistor Q1, the second end of the third resistor R1 is connected to the emitter of the transistor Q1, the emitter of the transistor Q1 is grounded, the collector of the transistor Q1 is connected to the second end of the fourth resistor R4, and the first end of the fourth resistor R4 is connected to the feedback end of the voltage boosting unit 100.
It should be noted that, based on the second embodiment, in this embodiment, when the output power of a certain channel or 2 feedback channels of the power amplifier unit 300 becomes large, the voltage fed back at the first feedback end AMP _ FB1 and the second feedback end AMP _ FB2 changes, and is shaped by the diode D2, and the first resistor R1, the second resistor R2, and the third resistor R3 divide the voltage; the first capacitor C1 and the second capacitor C2 filter, real-time signals of power amplifier output voltage are input to the base electrode of the triode Q1, and the triode Q1 is in a cut-off, amplification and saturation region according to the strength of the signals according to the conduction principle of the triode; the pin 14 (FB) of the boost control chip U1 will automatically adjust the output voltage due to the change of the feedback voltage; the output voltage range of the booster circuit jumps between 12V and 16V; the power amplifier can obtain corresponding working voltage, and saturation distortion of audio signals can not occur in a large volume state, so that energy conservation is realized, and the requirements of electrical performance indexes are met.
This embodiment is through increasing the capacitive resistance among feedback channel and the partial pressure filtering subunit for this dynamic boost circuit's function obtains further promotion, only needs simple zero device, just can realize the feedback of multichannel and more accurate filtering, has promoted audio amplifier system's the dynamic adjustability of music simultaneously.
In addition, in order to achieve the above object, the present invention further provides an electronic device, which includes the dynamic voltage boosting circuit as described above.
Since the electronic device adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
Furthermore, in order to achieve the above object, the present invention further provides an audio amplifier system, wherein the audio amplifier system comprises the dynamic boost circuit as described above.
It should be noted that the sound BOX system can be a sound BOX with battery power supply, a sound system, such as a square dance sound BOX, PARTY BOX, or a bluetooth sound BOX.
Since the sound box system adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in the specific application, those skilled in the art can set the solution as required, and the present invention is not limited thereto.
It should be noted that the above-described work flow is only illustrative, and does not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to practical needs, and the present invention is not limited herein.
In addition, the technical details that are not elaborated in this embodiment can be referred to the dynamic boost circuit provided in any embodiment of the present invention, and are not described herein again.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A dynamic boost circuit, characterized in that the dynamic boost circuit comprises: the device comprises a boosting unit and a dynamic feedback unit; wherein the content of the first and second substances,
the input end of the boosting unit is connected with the output end of the power supply unit, the output end of the boosting unit is connected with the input end of the power amplification unit, the input end of the dynamic feedback unit is connected with the feedback end of the power amplification unit, and the output end of the dynamic feedback unit is connected with the feedback end of the boosting unit;
the boosting unit is used for receiving the power supply voltage input by the power supply unit, boosting the power supply voltage and outputting the boosted power supply voltage to the power amplification unit;
the dynamic feedback unit is used for receiving the power amplifier feedback voltage fed back by the power amplifier unit, converting the power amplifier feedback voltage into a power amplifier change signal and outputting the power amplifier change signal to the boosting unit;
the boosting unit is further used for receiving the power amplifier change signal, dynamically boosting the power supply voltage according to the power amplifier change signal, and outputting the dynamically boosted power supply voltage to the power amplifier unit.
2. The dynamic boost circuit of claim 1, wherein the dynamic feedback unit comprises: the feedback receiving subunit, the voltage division filtering subunit and the conversion subunit; wherein the content of the first and second substances,
the input end of the feedback receiving subunit is connected with the feedback end of the power amplifier unit, the output end of the feedback receiving subunit is connected with the input end of the voltage division filtering subunit, the output end of the voltage division filtering subunit is connected with the input end of the conversion subunit, and the output end of the conversion subunit is connected with the feedback end of the voltage boosting unit.
3. The dynamic boosting circuit according to claim 2, wherein said feedback receiving subunit comprises a diode, an anode of said diode is connected to a feedback terminal of said power amplifying unit, and a cathode of said diode is connected to an input terminal of said voltage dividing and filtering subunit.
4. The dynamic boost circuit of claim 2, wherein said filter-press subunit comprises: a first resistor and a first capacitor; wherein the content of the first and second substances,
the second end of the first resistor is connected with the output end of the feedback receiving subunit, the first end of the first resistor is connected with the first end of the first capacitor, the second end of the first capacitor is grounded, the first end of the first resistor is connected with the input end of the converting subunit, and the second end of the first capacitor is further connected with the other input end of the converting subunit.
5. The dynamic boosting circuit according to claim 2, wherein the converting subunit comprises a third resistor, a fourth resistor and a transistor; wherein the content of the first and second substances,
the first end of the third resistor is connected with the output end of the voltage division filtering subunit and the base electrode of the triode, the second end of the third resistor is connected with the emitting electrode of the triode, the emitting electrode of the triode is grounded, the collecting electrode of the triode is connected with the second end of the fourth resistor, and the first end of the fourth resistor is connected with the feedback end of the boosting unit.
6. The dynamic boost circuit of claim 1, wherein the boost unit includes a boost control subunit, a first filtering subunit, a second filtering subunit; wherein the content of the first and second substances,
the input end of the first filtering subunit is connected with the output end of the power supply unit, and the output end of the first filtering subunit is connected with the input end of the boost control subunit;
the first output end of the boost control subunit is connected with the first input end of the power amplification unit, the feedback end of the boost control subunit is connected with the output end of the dynamic feedback unit, and the second output end of the boost control subunit is connected with the second input end of the power amplification unit and the input end of the second filter subunit;
one end of the first filtering subunit and one end of the second filtering subunit are grounded.
7. The dynamic voltage boosting circuit according to claim 6, wherein the voltage boosting control subunit comprises a voltage boosting control chip, a fourteenth pin of the voltage boosting control chip is connected to the output terminal of the dynamic feedback unit, a third pin of the voltage boosting control chip is connected to the first input terminal of the power amplifying unit, and a eleventh pin of the voltage boosting control chip is connected to the output terminal of the first filtering subunit.
8. The dynamic boost circuit of claim 7, wherein the boost control subunit further comprises: the first end of the fifth resistor, the first end of the sixth resistor and the first end of the seventh resistor are connected with the output end of the first filtering subunit, the second end of the fifth resistor, the second end of the sixth resistor and the second end of the seventh resistor are connected, and the second end of the seventh resistor is connected with the sixth pin of the boost control chip.
9. An electronic device comprising the dynamic boost circuit according to any one of claims 1 to 8.
10. An audio amplifier system, comprising the dynamic voltage boosting circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020809500.0U CN212695720U (en) | 2020-05-15 | 2020-05-15 | Dynamic booster circuit, electronic equipment and sound box system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020809500.0U CN212695720U (en) | 2020-05-15 | 2020-05-15 | Dynamic booster circuit, electronic equipment and sound box system |
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| Publication Number | Publication Date |
|---|---|
| CN212695720U true CN212695720U (en) | 2021-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020809500.0U Active CN212695720U (en) | 2020-05-15 | 2020-05-15 | Dynamic booster circuit, electronic equipment and sound box system |
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| Country | Link |
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| CN (1) | CN212695720U (en) |
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2020
- 2020-05-15 CN CN202020809500.0U patent/CN212695720U/en active Active
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Address after: 516006 community 37, Zhongkai high tech Zone, Huizhou, Guangdong Patentee after: Tongli Technology Co.,Ltd. Address before: 516006 Zhongkai high tech Zone 37, Huizhou, Guangdong Patentee before: TONLY ELECTRONICS HOLDINGS Ltd. |