CN205017558U - Low load car power amplifier circuit - Google Patents
Low load car power amplifier circuit Download PDFInfo
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- CN205017558U CN205017558U CN201520653228.0U CN201520653228U CN205017558U CN 205017558 U CN205017558 U CN 205017558U CN 201520653228 U CN201520653228 U CN 201520653228U CN 205017558 U CN205017558 U CN 205017558U
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- resistance
- chip
- irs2902
- pin
- triode
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Abstract
The utility model discloses a low load car power amplifier circuit, it includes the power amplifier chip circuit, an output circuit and the 2nd output circuit, the power amplifier chip circuit includes the IRS2902 chip, 3 feet of IRS2902 chip pass through resistance R566 and resistance R565 connection incoming signal, 13 feet of IRS2902 chip pass through inductance L501 and connect output port, 3 feet of resistance R568's one end IRS2902 chip, output port is connected to the other end, potentiometre SV501's first stiff end is connected to 16 feet of IRS2902 chip, 15 feet of IRS2902 chip pass through the variable end that resistance R581 connects potentiometre SV501, 13 feet of IRS2902 chip, 14 A output circuit is connected to foot and 15 feet, 10 feet of IRS2902 chip, 11 the foot, 12 the 2nd output circuit is connected to foot and 13 feet, diode D511's positive pole is connected to potentiometre SV501's variable end and second stiff end, diode D511's the negative pole VDDSW that connects. Can guarantee through the regulator potentiometer that normal work the protection can not appear and in the power amplifier in the 1ohM load. This scheme is applicable to on -vehicle high -power bass circuit.
Description
Technical field
The utility model relates to vehicle audio circuit, especially relates to a kind of low duty vehicle power amplifier.
Background technology
Vehicle power amplifier and power of vehicle amplifier, in order to amplify automobile audio power, reach desirable vehicle-mounted effect.Existing power amplifier is when exporting as low load, or can enter guard mode cannot work, or can cause big current and fuse wire even burns power unit.
State Intellectual Property Office of the People's Republic of China discloses on December 03rd, 2014 patent documentation (publication number CN203984360U) that name is called " the transistor vehicle power amplifier circuit without impact sound generated in switching process ", it comprises: a constant-current source module, and an optocoupler control module, wherein said constant-current source module is provided with a symmetrical difference channel, optocoupler is controlled by optocoupler control circuit, after constant-current source module receives the signal of optocoupler, open work.The defect of power amplifier cisco unity malfunction when this scheme fails to solve low load.
Summary of the invention
The technical problem that when the utility model mainly solves the low load existing for prior art, power amplifier cannot normally work etc., provides a kind of can driving to be low to moderate 1ohM load and the low duty vehicle power amplifier that electric current can not be caused excessive.
The utility model is mainly solved by following technical proposals for above-mentioned technical problem: a kind of low duty vehicle power amplifier, comprise power amplifier chips circuit, first output circuit and the second output circuit, described power amplifier chips circuit comprises IRS2902 chip, 3 pin of IRS2902 chip are connected input signal by resistance R566 with resistance R565, 13 pin of IRS2902 chip connect output port by inductance L 501, 3 pin of one end IRS2902 chip of resistance R568, the other end connects output port, IRS2902 chip 16 pin connect first stiff end of potentiometer SV501, 15 pin of IRS2902 chip connect the convertible tip of potentiometer SV501 by resistance R581, 13 pin of IRS2902 chip, 14 pin are connected the first output circuit with 15 pin, 10 pin of IRS2902 chip, 11 pin, 12 pin are connected the second output circuit with 13 pin, the convertible tip of potentiometer SV501 is connected the positive pole of diode D511 with the second stiff end, the negative pole of diode D511 connects power vd DSW.
As preferably, described first output circuit comprises resistance R584, resistance R585, resistance R588, resistance R589, resistance R590, triode Q511, triode Q512, metal-oxide-semiconductor Q515 and metal-oxide-semiconductor Q516; The first end of described resistance R584 connects 14 pin of IRS2902 chip, the base stage of the second end connecting triode Q511 and the base stage of triode Q512; The collector electrode of triode Q511 connects 15 pin of IRS2902 chip, and the collector electrode of triode Q512 connects 13 pin of IRS2902 chip; Resistance R585 is connected across between 13 pin of IRS2902 chip and 14 pin; Resistance R588 is connected across between the collector and emitter of triode Q512; The emitter of first end connecting triode Q511 of resistance R589 and the emitter of triode Q512, the second end connects the grid of metal-oxide-semiconductor Q515; The emitter of the first end connecting triode Q511 of resistance R590, the second end connects the grid of metal-oxide-semiconductor Q516; The drain electrode of metal-oxide-semiconductor Q515 is all connected power vd DSW with the drain electrode of metal-oxide-semiconductor Q516; The source electrode of metal-oxide-semiconductor Q515 is all connected 13 pin of IRS2902 chip with the source electrode of metal-oxide-semiconductor Q516.The first end of resistance R578 connects power vd DSW, and the second end connects 15 pin of IRS2902 chip.
As preferably, described second output circuit comprises resistance R586, resistance R587, resistance R591, resistance R592, resistance R593, triode Q513, triode Q514, metal-oxide-semiconductor Q517 and metal-oxide-semiconductor Q518; The first end of described resistance R586 connects 11 pin of IRS2902 chip, the base stage of the second end connecting triode Q513 and the base stage of triode Q514; The collector electrode of triode Q513 connects power supply+12V, and the collector electrode of triode Q514 connects power supply VSSSW; Resistance R587 is connected across between 10 pin of IRS2902 chip and 11 pin; Resistance R591 is connected across between the collector and emitter of triode Q514; The emitter of first end connecting triode Q513 of resistance R592 and the emitter of triode Q514, the second end connects the grid of metal-oxide-semiconductor Q517; The emitter of the first end connecting triode Q513 of resistance R593, the second end connects the grid of metal-oxide-semiconductor Q518; The drain electrode of metal-oxide-semiconductor Q517 is all connected 13 pin of IRS2902 chip with the drain electrode of metal-oxide-semiconductor Q518; The source electrode of metal-oxide-semiconductor Q515 is all connected power supply VSSSW with the source electrode of metal-oxide-semiconductor Q516.
The bass vehicle power amplifier of IRS2092 chip is adopted to accomplish more than maximum power 1600W; peak power reaches more than 2400W; stream is expanded because rear class have employed; load is difficult to accomplish accurate coupling; so added a 20k potentiometer at anode to be used for matched load; pass through regulator potentiometer; ensure that power amplifier there will not be protection when 1ohM load; even if transient peak reaches 2400W also there will not be protection; and power amplifier just can be protected when 0.5ohM load; to protect power amplifier, be unlikely to user and connect the loudspeaker of 0.5ohM load and occurred burning machine phenomenon.
The beneficial effect that the utility model brings is that reliability is high, can 1ohM load time power amplifier completely normally work, reach very strong bass effect.
Accompanying drawing explanation
Fig. 1 is a kind of circuit diagram of the present utility model.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: the low duty vehicle power amplifier of one of the present embodiment, as shown in Figure 1, comprise power amplifier chips circuit, first output circuit and the second output circuit, described power amplifier chips circuit comprises IRS2902 chip, 3 pin of IRS2902 chip are connected input signal by resistance R566 with resistance R565, 13 pin of IRS2902 chip connect output port by inductance L 501, 3 pin of one end IRS2902 chip of resistance R568, the other end connects output port, IRS2902 chip 16 pin connect first stiff end of potentiometer SV501, 15 pin of IRS2902 chip connect the convertible tip of potentiometer SV501 by resistance R581, 13 pin of IRS2902 chip, 14 pin are connected the first output circuit with 15 pin, 10 pin of IRS2902 chip, 11 pin, 12 pin are connected the second output circuit with 13 pin, the convertible tip of potentiometer SV501 is connected the positive pole of diode D511 with the second stiff end, the negative pole of diode D511 connects power vd DSW.
First output circuit comprises resistance R584, resistance R585, resistance R588, resistance R589, resistance R590, triode Q511, triode Q512, metal-oxide-semiconductor Q515 and metal-oxide-semiconductor Q516; The first end of described resistance R584 connects 14 pin of IRS2902 chip, the base stage of the second end connecting triode Q511 and the base stage of triode Q512; The collector electrode of triode Q511 connects 15 pin of IRS2902 chip, and the collector electrode of triode Q512 connects 13 pin of IRS2902 chip; Resistance R585 is connected across between 13 pin of IRS2902 chip and 14 pin; Resistance R588 is connected across between the collector and emitter of triode Q512; The emitter of first end connecting triode Q511 of resistance R589 and the emitter of triode Q512, the second end connects the grid of metal-oxide-semiconductor Q515; The emitter of the first end connecting triode Q511 of resistance R590, the second end connects the grid of metal-oxide-semiconductor Q516; The drain electrode of metal-oxide-semiconductor Q515 is all connected power vd DSW with the drain electrode of metal-oxide-semiconductor Q516; The source electrode of metal-oxide-semiconductor Q515 is all connected 13 pin of IRS2902 chip with the source electrode of metal-oxide-semiconductor Q516.The first end of resistance R578 connects power vd DSW, and the second end connects 15 pin of IRS2902 chip.
Second output circuit comprises resistance R586, resistance R587, resistance R591, resistance R592, resistance R593, triode Q513, triode Q514, metal-oxide-semiconductor Q517 and metal-oxide-semiconductor Q518; The first end of described resistance R586 connects 11 pin of IRS2902 chip, the base stage of the second end connecting triode Q513 and the base stage of triode Q514; The collector electrode of triode Q513 connects power supply+12V, and the collector electrode of triode Q514 connects power supply VSSSW; Resistance R587 is connected across between 10 pin of IRS2902 chip and 11 pin; Resistance R591 is connected across between the collector and emitter of triode Q514; The emitter of first end connecting triode Q513 of resistance R592 and the emitter of triode Q514, the second end connects the grid of metal-oxide-semiconductor Q517; The emitter of the first end connecting triode Q513 of resistance R593, the second end connects the grid of metal-oxide-semiconductor Q518; The drain electrode of metal-oxide-semiconductor Q517 is all connected 13 pin of IRS2902 chip with the drain electrode of metal-oxide-semiconductor Q518; The source electrode of metal-oxide-semiconductor Q515 is all connected power supply VSSSW with the source electrode of metal-oxide-semiconductor Q516.
Because VOFFSET (max), at ± 100V, so in order to increase power output, can only reduce output impedance.The present embodiment adopts the bass vehicle power amplifier of IRS2092 chip to accomplish more than maximum power 1600W; peak power reaches more than 2400W; stream is expanded because rear class have employed; load is difficult to accomplish accurate coupling; so added individual 20k potentiometer at anode to be used for matched load; pass through regulator potentiometer; ensure that power amplifier there will not be protection when 1ohM load; even if transient peak reaches 2400W also there will not be protection; and power amplifier just can be protected when 0.5ohM load; to protect power amplifier, be unlikely to user and connect the loudspeaker of 0.5ohM load and occurred burning machine phenomenon.This circuit is reliable, through large batch of checking.User feedback effect is fine, and when 1ohM load, power amplifier completely normally works, and reaches very strong bass effect.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Although more employ the term such as power amplifier chips, output circuit herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present utility model more easily; The restriction that they are construed to any one additional is all contrary with the utility model spirit.
Claims (3)
1. one kind low duty vehicle power amplifier, it is characterized in that, comprise power amplifier chips circuit, first output circuit and the second output circuit, described power amplifier chips circuit comprises IRS2902 chip, 3 pin of IRS2902 chip are connected input signal by resistance R566 with resistance R565, 13 pin of IRS2902 chip connect output port by inductance L 501, 3 pin of one end IRS2902 chip of resistance R568, the other end connects output port, IRS2902 chip 16 pin connect first stiff end of potentiometer SV501, 15 pin of IRS2902 chip connect the convertible tip of potentiometer SV501 by resistance R581, 13 pin of IRS2902 chip, 14 pin are connected the first output circuit with 15 pin, 10 pin of IRS2902 chip, 11 pin, 12 pin are connected the second output circuit with 13 pin, the convertible tip of potentiometer SV501 is connected the positive pole of diode D511 with the second stiff end, the negative pole of diode D511 connects power vd DSW.
2. the low duty vehicle power amplifier of one according to claim 1, it is characterized in that, described first output circuit comprises resistance R584, resistance R585, resistance R588, resistance R589, resistance R590, triode Q511, triode Q512, metal-oxide-semiconductor Q515 and metal-oxide-semiconductor Q516; The first end of described resistance R584 connects 14 pin of IRS2902 chip, the base stage of the second end connecting triode Q511 and the base stage of triode Q512; The collector electrode of triode Q511 connects 15 pin of IRS2902 chip, and the collector electrode of triode Q512 connects 13 pin of IRS2902 chip; Resistance R585 is connected across between 13 pin of IRS2902 chip and 14 pin; Resistance R588 is connected across between the collector and emitter of triode Q512; The emitter of first end connecting triode Q511 of resistance R589 and the emitter of triode Q512, the second end connects the grid of metal-oxide-semiconductor Q515; The emitter of the first end connecting triode Q511 of resistance R590, the second end connects the grid of metal-oxide-semiconductor Q516; The drain electrode of metal-oxide-semiconductor Q515 is all connected power vd DSW with the drain electrode of metal-oxide-semiconductor Q516; The source electrode of metal-oxide-semiconductor Q515 is all connected 13 pin of IRS2902 chip with the source electrode of metal-oxide-semiconductor Q516.
3. the low duty vehicle power amplifier of one according to claim 1 and 2, it is characterized in that, described second output circuit comprises resistance R586, resistance R587, resistance R591, resistance R592, resistance R593, triode Q513, triode Q514, metal-oxide-semiconductor Q517 and metal-oxide-semiconductor Q518; The first end of described resistance R586 connects 11 pin of IRS2902 chip, the base stage of the second end connecting triode Q513 and the base stage of triode Q514; The collector electrode of triode Q513 connects power supply+12V, and the collector electrode of triode Q514 connects power supply VSSSW; Resistance R587 is connected across between 10 pin of IRS2902 chip and 11 pin; Resistance R591 is connected across between the collector and emitter of triode Q514; The emitter of first end connecting triode Q513 of resistance R592 and the emitter of triode Q514, the second end connects the grid of metal-oxide-semiconductor Q517; The emitter of the first end connecting triode Q513 of resistance R593, the second end connects the grid of metal-oxide-semiconductor Q518; The drain electrode of metal-oxide-semiconductor Q517 is all connected 13 pin of IRS2902 chip with the drain electrode of metal-oxide-semiconductor Q518; The source electrode of metal-oxide-semiconductor Q515 is all connected power supply VSSSW with the source electrode of metal-oxide-semiconductor Q516.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520653228.0U CN205017558U (en) | 2015-08-27 | 2015-08-27 | Low load car power amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520653228.0U CN205017558U (en) | 2015-08-27 | 2015-08-27 | Low load car power amplifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205017558U true CN205017558U (en) | 2016-02-03 |
Family
ID=55216139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520653228.0U Expired - Fee Related CN205017558U (en) | 2015-08-27 | 2015-08-27 | Low load car power amplifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205017558U (en) |
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2015
- 2015-08-27 CN CN201520653228.0U patent/CN205017558U/en not_active Expired - Fee Related
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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 | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170928 Address after: Hangzhou City, Zhejiang Province, the 311201 economic and Technological Development Zone Xiaoshan District Road No. 77 Patentee after: Hangzhou Manko Technology Co.,Ltd. Address before: Hangzhou City, Zhejiang Province, the 311201 economic and Technological Development Zone Xiaoshan District Road No. 77 Patentee before: HANGZHOU MANKO ELECTRONICS CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160203 Termination date: 20200827 |