CN203166834U - Digital power amplification circuit with switching power supply - Google Patents
Digital power amplification circuit with switching power supply Download PDFInfo
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- CN203166834U CN203166834U CN 201320223120 CN201320223120U CN203166834U CN 203166834 U CN203166834 U CN 203166834U CN 201320223120 CN201320223120 CN 201320223120 CN 201320223120 U CN201320223120 U CN 201320223120U CN 203166834 U CN203166834 U CN 203166834U
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Abstract
The utility model relates to a digital power amplification circuit with a switching power supply. The digital power amplification circuit is used for a professional sound, an active loudspeaker and a broadcasting system, and comprises a power circuit, a pulse width modulation (PWM) generator and driving circuit and a power amplification circuit, wherein the input end of the power circuit is connected with AC220V; the power circuit outputs direct current power required by the PWM generator and driving circuit and the power amplification circuit; a signal is input into the input end of the PWM generator and driving circuit; the output end of the PWM generator and driving circuit is connected with the input end of the power amplification circuit; and output power is output from the output of the power amplification circuit. The digital power amplification circuit has the characteristics of low power consumption, high efficiency, small size, low manufacturing cost and the like.
Description
Technical field
Utility model relates to the digital power amplifier technical field, particularly a kind of belt switch power supply digital power amplifier circuit for professional sound equipment, active audio amplifier, broadcast system.
Background technology
Existing analog amplifier uses category-A, category-B, AB class and power transformer to form, and power-efficient is low, the cost height, and technical indicator is low, and volume is big, weight heaviness, production test trouble.
Digital power amplifier adopts the switch amplifying technique, is a kind of novel power amplifier, compares with the traditional analog Linear Power Amplifier, has advantages such as efficient height, distortion is little, power is big, frequency response is wide, volume is little, production test is convenient, is the direction of following power amplifier development.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming of traditional analog Linear Power Amplifier, provides a kind of efficient height, energy consumption is low, volume is little, in light weight, digital power amplifier that cost is low.
The utility model, comprise power circuit, PWM generator and drive circuit and power amplifier, the input of power circuit connects AC220V, power circuit output PWM generator and drive circuit and the required DC power supply of power amplifier, signal is from the input input of PWM generator and drive circuit, the output of PWM generator and drive circuit is connected with the input of power amplifier, and power output is from the output output of power amplifier.
The utility model, described PWM generator and drive circuit comprise that model is that 74HC04(also can select other 74 serial model No. or NE555, similar integrated package such as NE556) integrated circuit U1, model is 4580 integrated circuit U2, model is that 74HC08(also can select other 74 serial model No. or NE555, similar integrated package such as NE556) integrated circuit U3 and model are that IR2113(also can select IR2110, similar integrated package such as IR2500) integrated circuit U4, signal is by the 6 pin input of integrated circuit U2, export through 7 pin, after the signal process resistance R 2 of 7 pin output, enter 1 pin of integrated circuit U1, by 2 of integrated circuit U1,3 pin and 5 pin are input to 2 of integrated circuit U3 respectively, 5 pin, again by 3 of integrated circuit U3,7 output to 12 of integrated circuit U4,14 pin, signal is again from 1 of integrated circuit U4,8 pin enter the input of field effect transistor Q5000 and field effect transistor Q5001, output audio power after the output signal after field effect transistor Q5000 and the field effect transistor Q5001 amplification is by inductance L 5000 and capacitor C 5005 filtering.
The utility model has characteristics such as power consumption is little, efficient is high, volume is little, low cost of manufacture.
Description of drawings
Fig. 1 is structural principle block diagram of the present utility model; Fig. 2 is PWM generator and the drive circuit schematic diagram of embodiment; Fig. 3 is the power amplifier schematic diagram of embodiment.
Embodiment
Please refer to Fig. 1-Fig. 3, a kind of belt switch power supply digital power amplifier circuit, comprise power circuit, PWM generator and drive circuit and power amplifier, the input of power circuit connects AC220V, power circuit output PWM generator and drive circuit and the required DC power supply of power amplifier, signal is from the input input of PWM generator and drive circuit, and the output of PWM generator and drive circuit is connected with the input of power amplifier, and power output is from the output output of power amplifier.
Wherein, PWM generator is integrated circuit U1, the model of 74HC04 is 4580 integrated circuit U2, model is 74HC08 integrated circuit U3 and diode D1, D2, D3, D4 by model, triode Q1, Q2, resistance R 1, R2, R3, R4, R5, R6, R7, R8, R9, R10, capacitor C 1, C2, C3, C4, C5, C6, C7, C8, C9 composition.
Drive circuit is the integrated circuit U4 of IR2113 and diode D5, D6, D7 by model, resistance R 11, R12, R13, R14, R15, and capacitor C10, C11 form.
Power amplifier is by field effect transistor Q5000, Q5001, resistance R 5000, and capacitor C 5000, C5001, C5004, C5005, C5007, C5009, inductance L 5000, relay K 5000 is formed the single channel power output circuits.When increasing a cover PWM generator and drive circuit, power amplifier increases field effect transistor Q5002, Q5003, resistance R 5001, and the binary channels power output circuit is formed in capacitor C 5002, C5003, C5006, C5008 and inductance L 5001 backs.
Its operation principle (be example with the single channel) is: signal is by the 6 pin input of integrated circuit U2, export through 7 pin, after the signal process resistance R 2 of 7 pin output, enter 1 pin of integrated circuit U1, by 2 of integrated circuit U1,3 pin and 5 pin are input to 2 of integrated circuit U3 respectively, 5 pin, again by 3 of integrated circuit U3,7 output to 12 of integrated circuit U4,14 pin, signal is again from 1 of integrated circuit U4,8 pin enter the input of field effect transistor Q5000 and field effect transistor Q5001, output audio power after the output signal after field effect transistor Q5000 and the field effect transistor Q5001 amplification is by inductance L 5000 and capacitor C 5005 filtering.
Present embodiment, when improving the power supply level pressure, when circuit was bridge joint output, the above level pressure output of exportable 100V was as the broadcasting digital power amplifier.
Claims (2)
1. belt switch power supply digital power amplifier circuit, it is characterized in that: comprise power circuit, PWM generator and drive circuit and power amplifier, the input of power circuit connects AC220V, power circuit output PWM generator and drive circuit and the required DC power supply of power amplifier, signal is from the input input of PWM generator and drive circuit, the output of PWM generator and drive circuit is connected with the input of power amplifier, and power output is from the output output of power amplifier.
2. digital power amplifier circuit according to claim 1, it is characterized in that: described PWM generator and drive circuit comprise that model is the integrated circuit U1 of 74HC04, model is 4580 integrated circuit U2, model is the integrated circuit U3 of 74HC08 and the integrated circuit U4 that model is IR2113, signal is by the 6 pin input of integrated circuit U2, export through 7 pin, after the signal process resistance R 2 of 7 pin output, enter 1 pin of integrated circuit U1, by 2 of integrated circuit U1,3 pin and 5 pin are input to 2 of integrated circuit U3 respectively, 5 pin, again by 3 of integrated circuit U3,7 output to 12 of integrated circuit U4,14 pin, signal is again from 1 of integrated circuit U4,8 pin enter the input of field effect transistor Q5000 and field effect transistor Q5001, output audio power after the output signal after field effect transistor Q5000 and the field effect transistor Q5001 amplification is by inductance L 5000 and capacitor C 5005 filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320223120 CN203166834U (en) | 2013-04-27 | 2013-04-27 | Digital power amplification circuit with switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320223120 CN203166834U (en) | 2013-04-27 | 2013-04-27 | Digital power amplification circuit with switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203166834U true CN203166834U (en) | 2013-08-28 |
Family
ID=49027988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320223120 Expired - Fee Related CN203166834U (en) | 2013-04-27 | 2013-04-27 | Digital power amplification circuit with switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203166834U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109286873A (en) * | 2018-11-13 | 2019-01-29 | 合肥工业大学 | A kind of plasma sound equipment |
-
2013
- 2013-04-27 CN CN 201320223120 patent/CN203166834U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109286873A (en) * | 2018-11-13 | 2019-01-29 | 合肥工业大学 | A kind of plasma sound equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20160427 |