CN201601598U - Protector of power supply and speaker - Google Patents
Protector of power supply and speaker Download PDFInfo
- Publication number
- CN201601598U CN201601598U CN2010201148200U CN201020114820U CN201601598U CN 201601598 U CN201601598 U CN 201601598U CN 2010201148200 U CN2010201148200 U CN 2010201148200U CN 201020114820 U CN201020114820 U CN 201020114820U CN 201601598 U CN201601598 U CN 201601598U
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- CN
- China
- Prior art keywords
- power supply
- supply unit
- circuit
- power
- loud speaker
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- Expired - Lifetime
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Abstract
The utility model discloses a protector of a power supply and a speaker, mainly comprising a power amplifier, wherein the power amplifier receives sound source signals and a needed direct-current power supply supplied by the power supply to the amplifier; when being amplified, the sound source signals are connected to an output port of the speaker; the signals are taken out of the port and become direct-current voltage after rectification and integration by a direct-current integrating circuit; the direct-current voltage is connected to a comparison circuit for comparison; the comparison result is sent to a microprocessor unit (MCU) for interpretation; when continuously receiving power signals exceeding the set value in the set time, the microprocessor unit outputs PWM signals so as to be converted to direct-current voltage by the direct-current integrating circuit, then the direct-current voltage is connected to the power supply; and the reduction or increasing of the output voltage of the power supply adopts slow reduction or increasing design, and the increasing and reducing time and gradient are controlled by the PWM signals of the microprocessor unit (MCU) so as to avoid noise and hearing change due to rapid increasing and reducing.
Description
Technical field
The utility model is the protective device about a kind of power supply unit and loud speaker; be meant a kind of power supply unit and loud speaker of selecting little wattage for use especially; in the time that the loudspeaker power output is being set; when output reaches the power of rated value continuously; can downgrade by the power supply of microprocessor, to reach the purpose of protection power supply unit and loud speaker power supply unit.
Background technology
When loud speaker during at playing back music or other sound, musical sound is bigger, represent power supply higher for the out-put supply power of device, if power supply unit is exported when being higher than the power of rated value in a period of time continuously, will cause power supply unit and loud speaker to load, and situation unstable or that burn takes place.Therefore, desire to address the above problem, will adopt the power supply unit and the loud speaker of big wattage usually, damage to avoid power supply unit and loud speaker; Yet, though adopt the power supply unit and the loud speaker of big wattage to address the above problem, but still have following disappearance:
1. the purchase cost of the power supply unit of big wattage and loud speaker is higher, does not meet economic benefit.
2. the power supply unit of big wattage and the volume of loud speaker are bigger, cause the sound equipment can't miniaturization.
3. multichannel and big power output device are popularized in a large number, and the load of power supply unit is increasing, the difficult carrying of general power supply.
This shows that above-mentioned existing article still have many disappearances, real non-good design, and demand urgently being improved.
Summary of the invention
The purpose of this utility model promptly is to provide a kind of not to be influenced under the acoustics, adopts the power supply unit and the loud speaker of little wattage, reaches the power supply unit of the purpose that reduces cost and the protective device of loud speaker.
A purpose more of the present utility model promptly is to provide a kind of volume that dwindles multichannel audio, with the power supply unit that reaches sound equipment miniaturization purpose and the protective device of loud speaker.
The power supply unit of above-mentioned purpose and the protective device of loud speaker be can reach, power supply unit, power amplifier, loud speaker, first, second d.c. integration circuit, comparison circuit, microprocessor (MCU) mainly comprised; Wherein, this power supply unit is made up of pwm control circuit and power supply circuit, and power supply circuit mainly supplies power amplifier required DC power supply, and power amplifier mainly is that sound source signal is amplified the action of rear drive loud speaker; The amplifying power signal of first d.c. integration circuit acquisition power amplifier output; and after power signal carried out rectification and is integrated into direct voltage; be sent in the comparison circuit and compare; and comparative result is sent in the microprocessor; this microprocessor meeting interpretation is in setting-up time; whether the comparative result of comparison circuit input is all greater than set point; if; promptly represent amplifier to export continuously and be higher than set point; can cause power supply unit and loud speaker to have and burn or instability; this microprocessor output pwm signal immediately is integrated into the pwm control circuit that direct voltage is connected to power supply unit through the second d.c. integration circuit; make the pwm control circuit of power supply unit promptly can be according to the reception direct voltage; the out-put supply of power supply circuits is downgraded requirements; and then the power output of reduction power amplifier, to reach the purpose of protecting power supply unit and loud speaker simultaneously.
The protective device of power supply unit provided by the utility model and loud speaker when comparing mutually with prior art, has more following advantage:
1. the utility model can downgrade back requirements with the power output of power supply unit, makes it under the effect that does not influence sound equipment, adopts the power supply unit and the loud speaker of little wattage, to reach the purpose that reduces cost.
2. the utility model can dwindle the volume of multichannel audio, to reach the purpose of sound equipment miniaturization.
Description of drawings
Fig. 1 is the calcspar of the protective device of the utility model power supply unit and loud speaker; And
Fig. 2 is the circuit diagram of the protective device of the utility model power supply unit and loud speaker;
Reference numeral: 1, power supply unit; 11, power supply circuit; 12, pwm control circuit; 2, power amplifier; 3, loud speaker; 4, the first d.c. integration circuit; 5, comparison circuit; 6, microprocessor; 61, pwm signal; 7, the second d.c. integration circuit.
Embodiment
Seeing also Figure 1 and Figure 2, is the protective device of power supply unit provided by the utility model and loud speaker, mainly comprises:
The first d.c. integration circuit 4, this first d.c. integration circuit 4 is connected with power amplifier 2, with the power signal of received power amplifier 2 output, and after the power signal that is received is integrated into direct voltage, is sent to comparison circuit 5;
The second d.c. integration circuit 7, this second d.c. integration circuit 7 receives the pwm signal 61 of microprocessor 61, and after signal integration become direct voltage, be sent to the pwm control circuit 12 of power supply unit 1, the direct voltage size behind this integration is to be decided by the pulse duration of the pwm signal 61 of microprocessor 6 outputs;
Whether the signal of importing high potentials when microprocessor 6 meeting interpretation comparison circuits 5 has above setting-up time, if in setting-up time, the pwm signal of these microprocessor 6 outputs does not change, this power supply unit 1 of this interval scale and loud speaker 3 can bear the power output that surpasses normal value in this setting-up time, instability can't take place or burn situation;
If microprocessor 6 is judged when the time of comparison circuit 5 input high potential signals surpasses setting-up time, promptly represent the power supply of power-supplying circuit 11 outputs of power supply unit 1 to surpass scope and the time that power supply unit 1 and loud speaker 3 can bear power, at this moment, the pwm signal 61 of these microprocessor 6 outputs begins to change, this direct voltage also changes according to setting-up time with pwm signal 61, cause pwm control circuit 12 promptly can change the out-put supply of power supply circuit 11 according to the pwm signal 61 that is received, make out-put supply downgrade requirements, avoid power supply unit 1 to damage because of power output overloads; Loud speaker 3 surpasses maximum rating because of the power that receives, and burns, to reach the purpose of protection power supply unit 1 and loud speaker 3.
In addition, the setting-up time of this microprocessor 6 is can bear power output according to power supply unit 1 and loud speaker 3 to decide greater than the time of normal value.
Therefore; the utility model is worked as microprocessor 6 interpretations and is gone out the power amplifier 2 continuous performance numbers of exporting greater than set point; and when surpassing setting-up time; promptly can output pwm signal 61 behind 7 one-tenth direct currents of the second d.c. integration circuit; be sent to power supply unit 1; the power output of power supply unit 1 is downgraded desirable value; avoid power supply unit 1 and loud speaker 3 to take place unstable or burn; therefore; the utility model can be protected power supply unit 1 and loud speaker 3 simultaneously; so during as if power supply unit 1 that adopts less wattage and loud speaker 3; in case loud speaker 3 is because of playing sound excessive and the time surpasses set point; when causing power supply unit 1 in setting-up time, to export the power supply that overloads continuously; this microprocessor 6 promptly can be automatically downgrades normal value with the out-put supply of power supply unit 1; as long as power output maintains normal value, promptly can not influence the playback quality of loud speaker 3.Therefore,, need not use the power supply unit 1 and the loud speaker 3 of big wattage, to reach the purpose of saving cost and volume by protective device of the present utility model.
In addition, microprocessor 6 is at the output voltage that downgrades or increase power supply unit 1, adopt the design slowly downgrade or increase, rising and fall time and slope be by pwm signal 61 controls of microprocessor (MCU) 6, with avoid the generation source rapidly the noise and the sense of hearing that cause of lifting change.
Above-listed detailed description is specifying at possible embodiments of the present utility model, this embodiment is not in order to limit claim of the present utility model, allly do not break away from that equivalence of the present utility model is implemented or change, all should be contained in the claim of the present utility model.
Claims (4)
1. the protective device of power supply unit and loud speaker is characterized in that: comprising:
Power supply unit, it comprises power supply circuit and pwm control circuit, the output voltage values of this pwm control circuit control power supply circuit;
Power amplifier, it receives sound source signal, and with after the sound source signal amplification that is received, drives loudspeaker plays sound, power supply unit supply amplifying circuit institute energy requirement;
The first d.c. integration circuit, the power signal of its received power amplifier output, and, be sent to comparison circuit to after the power signal rectification that received and being integrated into direct voltage;
Comparison circuit, it receives the direct voltage of the first d.c. integration circuit, and this direct voltage and set point are compared, and again comparative result is sent to microprocessor;
Microprocessor, it receives the signal of comparison circuit, this microprocessor if interpretation in the time of setting, the comparative result of comparison circuit input is greater than set point, this microprocessor is output pwm signal to the second d.c. integration circuit immediately, after pwm signal is integrated into direct voltage, is sent to the pwm control circuit of power supply unit, the pwm control circuit that makes power supply unit promptly can be according to the reception direct voltage, and the out-put supply of power supply circuit is downgraded requirements.
2. the protective device of power supply unit as claimed in claim 1 and loud speaker; it is characterized in that: the comparison result of described comparison circuit is high potential or electronegative potential; on behalf of comparative result, this high potential surpass set point, and on behalf of comparative result, electronegative potential do not surpass set point.
3. the protective device of power supply unit as claimed in claim 1 and loud speaker is characterized in that: the direct voltage size behind the described second d.c. integration circuit integration is decided by the pulse duration of the pwm signal of microprocessor output.
4. the protective device of power supply unit as claimed in claim 1 and loud speaker is characterized in that: the setting-up time of described microprocessor, can bear power output according to power supply unit and loud speaker and decide greater than the time of normal value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201148200U CN201601598U (en) | 2010-01-22 | 2010-01-22 | Protector of power supply and speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201148200U CN201601598U (en) | 2010-01-22 | 2010-01-22 | Protector of power supply and speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201601598U true CN201601598U (en) | 2010-10-06 |
Family
ID=42812658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201148200U Expired - Lifetime CN201601598U (en) | 2010-01-22 | 2010-01-22 | Protector of power supply and speaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201601598U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103901782A (en) * | 2012-12-25 | 2014-07-02 | 联想(北京)有限公司 | Sound control method, electronic device and sound control apparatus |
| CN107360505A (en) * | 2017-07-10 | 2017-11-17 | 深圳市中移联半导体科技有限公司 | A kind of high-effect automatic modulation booster circuit and control method |
| CN110677775A (en) * | 2019-09-24 | 2020-01-10 | Tcl通力电子（惠州）有限公司 | Voltage dynamic control circuit and audio playing device |
-
2010
- 2010-01-22 CN CN2010201148200U patent/CN201601598U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103901782A (en) * | 2012-12-25 | 2014-07-02 | 联想(北京)有限公司 | Sound control method, electronic device and sound control apparatus |
| CN107360505A (en) * | 2017-07-10 | 2017-11-17 | 深圳市中移联半导体科技有限公司 | A kind of high-effect automatic modulation booster circuit and control method |
| WO2019010967A1 (en) * | 2017-07-10 | 2019-01-17 | 深圳市中移联半导体科技有限公司 | High efficiency automatic modulation voltage boost circuit and control method |
| CN107360505B (en) * | 2017-07-10 | 2021-06-08 | 林其亮 | High-efficiency automatic modulation booster circuit and control method |
| CN110677775A (en) * | 2019-09-24 | 2020-01-10 | Tcl通力电子（惠州）有限公司 | Voltage dynamic control circuit and audio playing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170510 Address after: New town, Huiyang District, Guangdong, Huizhou Patentee after: East hung Electronics (Huiyang) Co., Ltd. Address before: The British Virgin Islands of Tortola Rodez Wickham reef I No. 24 Castro street, jakala building Patentee before: Sound Cheers Limited |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101006 |
|
| CX01 | Expiry of patent term |