CN212413125U - Compact digital power amplifier - Google Patents
Compact digital power amplifier Download PDFInfo
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- CN212413125U CN212413125U CN202021186586.2U CN202021186586U CN212413125U CN 212413125 U CN212413125 U CN 212413125U CN 202021186586 U CN202021186586 U CN 202021186586U CN 212413125 U CN212413125 U CN 212413125U
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- protection module
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Abstract
The utility model discloses a compact's digital power amplifier, which comprises a housin, the inside of casing is provided with digital power amplifier module, the inside of casing is provided with control protection module, the both sides of casing all are provided with the heat dissipation window, the inside one side fixed mounting who is located the heat dissipation window of casing has the fan, the front of casing is provided with control button, the positive fixed mounting of casing has the display screen, the front of casing is provided with input/output port. The utility model discloses a short-circuit protection module, excessive pressure undervoltage protection module and temperature protection module and setting have realized transshipping, short-circuit protection to power amplifier, automatic temperature control, and excessive pressure, undervoltage protection have satisfied the demand of power amplifier steady operation, adopt efficient D class digital power amplifier design scheme consumption lower, and the power is bigger, and the casing inner structure distributes rationally, and the space is compact for whole device volume is littleer.
Description
Technical Field
The utility model relates to a power amplifier technical field specifically is a compact digital power amplifier.
Background
A power amplifier, referred to as "power amplifier" for short, refers to an amplifier that can generate maximum power output to drive a load (e.g., a speaker) under a given distortion rate condition, and the power amplifier plays a pivotal role of "organization and coordination" in the whole sound system, and to some extent, determines whether the whole system can provide good sound quality output.
The existing power amplifier has large output power and high requirement on linearity index, the working temperature under normal working environment can reach 50 ℃, if the existing power amplifier works under severe environment, the working temperature reaches 80 ℃ or even 100 ℃, the output technical index of the power amplifier starts to deteriorate, when the working temperature reaches 80 ℃, the stability and the reliability of the microwave power amplifier are reduced, even the microwave power amplifier is damaged, and other protection means are less, so that the compact digital power amplifier is provided at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a digital power amplifier of compact is in order to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a digital power amplifier of compact, includes the casing, the inside of casing is provided with digital power amplifier module, the inside of casing is provided with control protection module, the both sides of casing all are provided with the heat dissipation window, one side fixed mounting that the casing is inside to be located the heat dissipation window has the fan, the front of casing is provided with control button, the positive fixed mounting of casing has the display screen, the front of casing is provided with input/output port.
Preferably, the top of the shell is provided with a cover plate, and the cover plate is connected with the shell through a fixing screw.
Preferably, the digital power amplifier module adopts a high-efficiency class-D digital power amplifier design scheme, and the digital power amplifier module comprises an audio input end, an isolation amplifier, an error amplifier, a modulator, a driver, a switching amplifier and a low-pass filter.
Preferably, the control protection module comprises a short-circuit protection module, an overvoltage and undervoltage protection module and a temperature protection module, and the short-circuit protection module, the overvoltage and undervoltage protection module, the temperature protection module and the digital power amplifier module are electrically connected.
Preferably, the temperature protection module comprises a temperature detection circuit, an amplification circuit, a comparator and a switch control circuit, and the temperature detection circuit, the amplification circuit, the comparator and the switch control circuit are electrically connected in sequence.
Preferably, the heat dissipation window is composed of a plurality of heat dissipation fins arranged in a shape like a Chinese character 'yi' at equal intervals, and the heat dissipation fins are made of aluminum.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a short-circuit protection module, excessive pressure undervoltage protection module and temperature protection module and setting have realized transshipping, short-circuit protection to power amplifier, automatic temperature control, and excessive pressure, undervoltage protection have satisfied the demand of power amplifier steady operation.
2. The utility model discloses an adopt efficient D class digital power amplifier design scheme consumption lower, the power is bigger, and the casing inner structure distributes rationally, and the space is compact for whole device volume is littleer, light in weight, simultaneously, mutually independent between the module adopts the module type design, is convenient for dispose as required.
Drawings
FIG. 1 is a schematic view of the three-dimensional structure of the housing of the present invention;
fig. 2 is a schematic diagram of the digital power amplifier module structure of the present invention;
FIG. 3 is a schematic structural view of the temperature protection module of the present invention;
fig. 4 is a schematic view of the three-dimensional structure of the present invention.
In the figure: 1. a housing; 2. a digital power amplifier module; 3. a control protection module; 301. a short circuit protection module; 302. an overvoltage and undervoltage protection module; 303. a temperature protection module; 4. a heat dissipation window; 5. a fan; 6. a control button; 7. a display screen; 8. an input-output port; 9. and (7) a cover plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-4, the present invention provides an embodiment: a compact digital power amplifier comprises a shell 1, a digital power amplifier module 2 is arranged in the shell 1, the main components of the power amplifier, a control protection module 3 is arranged in the shell 1 and is used for controlling and protecting the short circuit, overvoltage and undervoltage and temperature of the power amplifier, thereby having good protection effect on the power amplifier and being beneficial to the long-term use of the device, both sides of the shell 1 are provided with the heat dissipation windows 4, one side of the interior of the shell 1, which is positioned at the heat dissipation window 4, is fixedly provided with the fan 5, the interior of the shell 1 is subjected to heat dissipation by matching with the heat dissipation window 4, the front side of the shell 1 is provided with the control button 6, the front side of the shell 1 is fixedly provided with the display screen 7, the front surface of the casing 1 is provided with an input/output port 8 which mainly comprises an audio input port, an audio output port and the like.
Further, the top of casing 1 is provided with apron 9, protects the subassembly of inside, and apron 9 is connected with casing 1 through the set screw, is convenient for dismantle and install convenient the maintenance to apron 9.
Further, the digital power amplifier module 2 adopts a design scheme of efficient class D digital power amplifier, the power consumption is lower, the transmission interference between signals can be effectively reduced, and high fidelity is realized, and the digital power amplifier module 2 comprises an audio input end, an isolation amplifier, an error amplifier, a modulator, a driver, a switching amplifier and a low-pass filter, the above components are standard components, the connection mode and the working principle thereof belong to the known technology, and the details are not repeated here.
Further, the control protection module 3 includes a short-circuit protection module 301, an overvoltage and undervoltage protection module 302 and a temperature protection module 303, the short-circuit protection module 301, the overvoltage and undervoltage protection module 302 and the temperature protection module 303 are electrically connected with the digital power amplifier module 2, and the short-circuit protection module 301, the overvoltage and undervoltage protection module 302 and the temperature protection module 303 are connected in parallel and are mainly used for control protection of short circuit, overvoltage and undervoltage and temperature of the power amplifier.
Further, the temperature protection module 303 includes a temperature detection circuit, an amplification circuit, a comparator and a switch control circuit, which are electrically connected in sequence, and detects the normal working temperature of the power amplifier in real time through the detection of the amplification circuit, when the temperature is higher than the normal working range, the switch controller of the fan 5 receives the signal of the detection of the amplification circuit, and turns on the fan 5 according to the signal of the detection of the amplification circuit, so as to realize the temperature regulation of the power amplifier.
Furthermore, the heat dissipation window 4 is composed of a plurality of heat dissipation fins arranged in a shape like a Chinese character 'yi' at equal intervals, the heat dissipation fins are made of aluminum, and the heat dissipation effect of the heat dissipation fins made of aluminum is better.
Testing the overvoltage of a power supply: when the overvoltage and undervoltage protection module 302 is tested, the +120V power supply is increased to +128V, the negative power supply is kept unchanged, the module enters a protection state, the-120V power supply is reduced to-128V, the positive power supply is kept unchanged, and the module enters the protection state.
And (3) power supply under-voltage test: reducing the +120V power supply to +100V, keeping the negative power supply unchanged, and enabling the module to enter a protection state; and raising the power supply of-120V to-100V, keeping the positive power supply unchanged, and enabling the module to enter a protection state.
And (3) power supply overcurrent test: and the output standard load is changed to be 2 omega, the amplitude of the input audio signal is increased, when the output power exceeds 2800W, no signal is output from an audio output pin, and the module is in a protection state.
And (3) outputting a short circuit test: and (3) the audio output pins of the modules are in short circuit with each other, no signal is output from the audio output pins, the pin 8 of the XS2 is high, and the modules are in a protection state.
The working principle is as follows: the normal working temperature of the power amplifier is detected in real time through the detection amplifying circuit, when the temperature is higher than the normal working range, the switch controller of the fan 5 receives a signal of the detection amplifying circuit, and the fan 5 is started according to the signal of the detection amplifying circuit, so that the temperature of the power amplifier is adjusted.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. A compact digital power amplifier comprising a housing (1), characterized in that: the utility model discloses a portable electronic device, including casing (1), inside of casing (1) is provided with digital power amplifier module (2), the inside of casing (1) is provided with control protection module (3), the both sides of casing (1) all are provided with radiator window (4), one side fixed mounting that casing (1) is inside to be located radiator window (4) has fan (5), the front of casing (1) is provided with control button (6), the front fixed mounting of casing (1) has display screen (7), the front of casing (1) is provided with input/output port (8).
2. A compact digital power amplifier according to claim 1, characterized in that: the top of casing (1) is provided with apron (9), just apron (9) are connected with casing (1) through the set screw.
3. A compact digital power amplifier according to claim 1, characterized in that: the digital power amplifier module (2) adopts a high-efficiency D-type digital power amplifier design scheme, and the digital power amplifier module (2) comprises an audio input end, an isolation amplifier, an error amplifier, a modulator, a driver, a switching amplifier and a low-pass filter.
4. A compact digital power amplifier according to claim 1, characterized in that: the control protection module (3) comprises a short-circuit protection module (301), an overvoltage and undervoltage protection module (302) and a temperature protection module (303), and the short-circuit protection module (301), the overvoltage and undervoltage protection module (302), the temperature protection module (303) and the digital power amplifier module (2) are electrically connected.
5. The compact digital power amplifier of claim 4, wherein: the temperature protection module (303) comprises a temperature detection circuit, an amplification circuit, a comparator and a switch control circuit, wherein the temperature detection circuit, the amplification circuit, the comparator and the switch control circuit are sequentially electrically connected.
6. A compact digital power amplifier according to claim 1, characterized in that: the heat dissipation window (4) is composed of a plurality of heat dissipation fins which are arranged in a line shape at equal intervals, and the heat dissipation fins are made of aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021186586.2U CN212413125U (en) | 2020-06-24 | 2020-06-24 | Compact digital power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021186586.2U CN212413125U (en) | 2020-06-24 | 2020-06-24 | Compact digital power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212413125U true CN212413125U (en) | 2021-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021186586.2U Active CN212413125U (en) | 2020-06-24 | 2020-06-24 | Compact digital power amplifier |
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| CN (1) | CN212413125U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113710064A (en) * | 2021-08-26 | 2021-11-26 | 成都市浩泰电子科技有限公司 | Millimeter wave amplifier with protection structure and use method thereof |
-
2020
- 2020-06-24 CN CN202021186586.2U patent/CN212413125U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113710064A (en) * | 2021-08-26 | 2021-11-26 | 成都市浩泰电子科技有限公司 | Millimeter wave amplifier with protection structure and use method thereof |
| CN113710064B (en) * | 2021-08-26 | 2023-12-12 | 浩泰智能(成都)科技有限公司 | Millimeter wave amplifier with protection structure and use method thereof |
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