CN203562970U - Class-D power-amplifier switching power supply capable of supplying 1000w power - Google Patents
Class-D power-amplifier switching power supply capable of supplying 1000w power Download PDFInfo
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- CN203562970U CN203562970U CN201320779004.5U CN201320779004U CN203562970U CN 203562970 U CN203562970 U CN 203562970U CN 201320779004 U CN201320779004 U CN 201320779004U CN 203562970 U CN203562970 U CN 203562970U
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- 239000010752 BS 2869 Class D Substances 0.000 title abstract 2
- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 4
- 230000001681 protective effect Effects 0.000 claims description 11
- 230000003111 delayed effect Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Abstract
The utility model discloses a class-D power-amplifier switching power supply capable of supplying 1000w power. The switching power supply includes an EMC filtering circuit, a rectifying and filtering circuit, a transformer and an output rectifying and filtering circuit, which are connected in order. A PWM adjustment and control circuit and a PWM driving circuit are connected between the rectifying and filtering circuit and the transformer. A power-on delay start circuit, an over-voltage and under-voltage protection circuit and a DC output protection circuit are also connected electrically with the PWM adjustment and control circuit. The PWM adjustment and control circuit includes a SG3525 control chip and a peripheral circuit. The PWM driving circuit includes a model IR2110 driving chip and a peripheral switching-tube circuit. The IR2110 driving chip is connected with 11, 12 and 14 of the SG3525 control chip through pins 12, 13 and 14. A pin 1 and a pin 8 of the IR2110 driving chip are connected with the two ends of a primary winding of the transformer through the peripheral switching-tube circuit. The circuit is safe in work, low in power consumption when switched, high in efficiency and simple in structure. And the circuit has a comprehensive protecting function.
Description
Technical field
The utility model relates to a kind of Switching Power Supply, particularly a kind of Switching Power Supply for 1000W power D class power amplifier.
Background technology
The D class power amplifier of at present a lot of manufacturer production, also claim Class D audio-frequency power amplifier, power is mostly below 500W, cause meeting the tonequality of some high requests, once sound is heightened, will easily there is so distortion, destroy the effect of playing, but powerful product development is with high content of technology, development difficulty is very big, this powerful product has the emphasis of two research and development, first Class D power amplifier operating frequency is up to arriving 300-400KHz, and be operated under on off state, cause the normal use that circuit is unstable and very easily produce near the electric equipment of high frequency radiation interference, another one exploitation difficult point is the Switching Power Supply coordinating with it, meet 1000W RMS power switch power source needs and have the margin of power more than 1500W, such power supply is that to be operated under three high states be high voltage, high electric current, high switching frequency, ensure the safe operation of power supply, more difficult.
Utility model content
The purpose of this utility model be in order to solve above-mentioned the deficiencies in the prior art, provide the little efficiency of a kind of work safety switching loss high, there is perfect defencive function and the Switching Power Supply for 1000W power D class power amplifier simple in structure.
To achieve these goals, the Switching Power Supply for 1000W power D class power amplifier that the utility model is designed, comprise the EMC filter circuit connecting successively, current rectifying and wave filtering circuit, transformer and output rectifier and filter, between described current rectifying and wave filtering circuit and transformer, be connected with PWM adjusting control circuit and PWM drive circuit, on PWM adjusting control circuit, be also electrically connected with start delayed startup circuit, the direct current output protection circuit that the over-and under-voltage protective circuit that input signal is connected with AC AC signal and input signal are connected with D class power amplifier, and described PWM adjusting control circuit comprises pwm chip U2 and the peripheral circuit of SG3525, described PWM drive circuit comprises that model is PWM driving chip U1 and the peripheral switching tube circuit of IR2110, and PWM drives chip U1 by 12, 13, 14 pin respectively with 11 of pwm chip U2, 12, 14 connect, PWM drives 1 pin of chip U1 to be connected with the two ends of the former limit winding of transformer by peripheral switching tube circuit with 8 pin.
By above-mentioned design, realize peripheral AC signal AC signal and pass through successively EMC filter circuit; current rectifying and wave filtering circuit, transformer and output rectifier and filter finally flow to Class D power amplifier; during this time by pwm signal control ON time with amplifying signal; and by changing between the conducting of two-stage switching tube and cut-off; to obtain stable Class D power supply, and in conjunction with start delayed startup circuit, over-and under-voltage protective circuit and direct current output protection circuit, circuit is played a protective role.
It is common a kind of function admirable, the integrated PWM control chip of monolithic multiple functional and highly versatile that the PWM of the SG3525 model of mentioning in above-mentioned drives chip U1, its simple and reliable and easy to use and flexible, output drives as push-and-pull output form, has increased driving force; Undervoltage lockout circuit, SS (soft start) control circuit, PWM latch are contained in inside, have overcurrent protection function, and frequency is adjustable, can limit the advantage of maximum duty cycle simultaneously, therefore in the invention, do not do concrete detailed description.
The pwm chip U2 of the IR2110 model of mentioning in above-mentioned is the common driver that employing directly drives and two kinds of modes of isolation drive are produced by American I R company, generally have the advantage of light-coupled isolation and electromagnetic isolation concurrently, the first-selection that is driving element in middle low power converting means is applied in power conversion unit, and it has (1) independently low side and high-end input channel; (2) suspended power supply adopts boostrap circuit, and its high-end operating voltage can reach 500V; (3) voltage range of the power end (pin 3) of output is 10-20V; (4) input range of logic power (pin 9) 5-15V, can be easily and TTL, and CMOS level matches, and between logic power ground and power power-supply ground, allow the just amount of moving of V; (5) operating frequency is high, can reach 500KHz; (6) open, turn-off delay is little, is respectively 120ns and 94ns; (7) advantage of totem output peak current 2A is not therefore done concrete detailed description in the invention.
The Switching Power Supply for 1000W power D class power amplifier that the utility model obtains; by above-mentioned design, make integrated circuit there is the high feature of the little efficiency of work safety switching loss; designed perfect defencive function simultaneously; comprise over-and under-voltage protection; direct current protecting, output short-circuit overcurrent protection, overtemperature protection; time delay power-on protection, thus make circuit more safe and reliable.
Accompanying drawing explanation
Fig. 1 is the structural principle block diagram of embodiment.
In figure: EMC filter circuit 1, current rectifying and wave filtering circuit 2, transformer 3, output rectifier and filter 4, D class power amplifier 5, PWM adjusting control circuit 6, PWM drive circuit 7, direct current output protection circuit 8, over-and under-voltage protective circuit 9, start delayed startup circuit 10, peripheral switching tube circuit 11.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Embodiment:
As shown in Figure 1, the Switching Power Supply for 1000W power D class power amplifier that the present embodiment provides, comprise the EMC filter circuit 1 connecting successively, current rectifying and wave filtering circuit 2, transformer 3 and output rectifier and filter 4, and between described current rectifying and wave filtering circuit 2 and transformer 3, be connected with PWM adjusting control circuit 6 and PWM drive circuit 7, on PWM adjusting control circuit 6, be also electrically connected with start delayed startup circuit 10, the direct current output protection circuit 8 that the over-and under-voltage protective circuit 9 that input signal is connected with AC AC signal and input signal are connected with D class power amplifier 5, and described PWM adjusting control circuit 6 comprises pwm chip U2 and the peripheral circuit of SG3525, described PWM drive circuit 7 comprises that model is PWM driving chip U1 and the peripheral switching tube circuit 11 of IR2110, and PWM drives chip U1 by 12, 13, 14 pin respectively with 11 of pwm chip U2, 12, 14 connect, PWM drives 1 pin of chip U1 to be connected with the two ends of the former limit winding of transformer 3 by peripheral switching tube circuit 11 with 8 pin.
During work: peripheral AC signal AC signal passes through EMC filter circuit 1 successively, current rectifying and wave filtering circuit 2, transformer 3 and output rectifier and filter 4 finally flow to D class power amplifier 5, during this time by pwm signal control ON time with amplifying signal, and by changing between the conducting of two-stage switching tube and cut-off, to obtain stable Class D power supply, increased the effect that the delayed startup circuit 10 of starting shooting plays time delay power-on protection simultaneously, increased over-and under-voltage protective circuit 9, AC signal AC connects the input of over-and under-voltage protective circuit 9, the output of over-and under-voltage protective circuit 9 connects PWM adjusting control circuit 6, thereby when AC signal AC overvoltage, or when under-voltage, control PWM adjusting control circuit 6, thereby circuit is played a protective role, increased direct current output protection circuit 8, by direct current output protection circuit 8, realize D class power amplifier 5 is connected with PWM adjusting control circuit 6, the protection of realization to output, guarantee the safety in utilization of D class power amplifier 5.
The components and parts of above-mentioned described each protective circuit and between circuit connecting relation be the known technology of this technical staff, therefore do not do concrete introduction at this.
Claims (1)
1. the Switching Power Supply for 1000W power D class power amplifier, comprise the EMC filter circuit (1) connecting successively, current rectifying and wave filtering circuit (2), transformer (3) and output rectifier and filter (4), it is characterized in that: between described current rectifying and wave filtering circuit (2) and transformer (3), be connected with PWM adjusting control circuit (6) and PWM drive circuit (7), on PWM adjusting control circuit (6), be also electrically connected with start delayed startup circuit (10), the direct current output protection circuit (8) that the over-and under-voltage protective circuit (9) that input signal is connected with AC AC signal and input signal are connected with D class power amplifier (5), and described PWM adjusting control circuit (6) comprises that model is pwm chip U2 and the peripheral circuit of SG3525, described PWM drive circuit (7) comprises that model is PWM driving chip U1 and the peripheral switching tube circuit (11) of IR2110, and PWM drives chip U1 by 12, 13, 14 pin respectively with 11 of pwm chip U2, 12, 14 connect, PWM drives 1 pin of chip U1 to be connected with the two ends of the former limit winding of transformer (3) by peripheral switching tube circuit (11) with 8 pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320779004.5U CN203562970U (en) | 2013-12-03 | 2013-12-03 | Class-D power-amplifier switching power supply capable of supplying 1000w power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320779004.5U CN203562970U (en) | 2013-12-03 | 2013-12-03 | Class-D power-amplifier switching power supply capable of supplying 1000w power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203562970U true CN203562970U (en) | 2014-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320779004.5U Expired - Lifetime CN203562970U (en) | 2013-12-03 | 2013-12-03 | Class-D power-amplifier switching power supply capable of supplying 1000w power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203562970U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107371095A (en) * | 2017-08-25 | 2017-11-21 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 350W 600W+150W power amplifier modules |
-
2013
- 2013-12-03 CN CN201320779004.5U patent/CN203562970U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107371095A (en) * | 2017-08-25 | 2017-11-21 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 350W 600W+150W power amplifier modules |
| CN107371095B (en) * | 2017-08-25 | 2023-12-22 | 东莞精恒电子有限公司 | Pulse width modulation 350W-600W+150W power amplifier module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140423 |
|
| CX01 | Expiry of patent term |