CN203745944U - DSP (Digital Signal Processor) practical power circuit - Google Patents
DSP (Digital Signal Processor) practical power circuit Download PDFInfo
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- CN203745944U CN203745944U CN201320546635.2U CN201320546635U CN203745944U CN 203745944 U CN203745944 U CN 203745944U CN 201320546635 U CN201320546635 U CN 201320546635U CN 203745944 U CN203745944 U CN 203745944U
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Abstract
A DSP (Digital Signal Processor) practical power circuit comprises a voltage reduction circuit, a rectifier circuit, a filter circuit and a voltage regulator circuit, wherein the voltage reduction circuit is composed of a transformer; the rectifier circuit is composed of bridge rectifier diodes; the filter circuit is composed of a plurality of electrolytic capacitors; the voltage regulator circuit is composed of a switching voltage regulator integrated circuit. The DSP practical power circuit further comprises a voltage threshold circuit and a time-delay circuit, wherein the voltage threshold circuit is composed of a voltage regulator diode and resistors; the time-delay circuit is composed of polypropylene capacitors and a resistor. According to the utility model, the voltage threshold circuit is arranged in the DSP practical power circuit, so that the DSP practical power circuit starts working after input voltage is larger than the regulated voltage of the voltage regulator diode, and voltage stability after voltage input is ensured; the time-delay circuit is arranged in the DSP practical power circuit, so that after a delay for 10 milliseconds, the function of the switching voltage regulator integrated circuit is started, instability caused by voltage fluctuation is avoided by avoiding voltage fluctuation time, and the integrity and success of the power-on reset process of a DSP are ensured.
Description
Technical field
The present invention relates to power technique fields, especially a kind of DSP utility power circuit.
Background technology
Digital signal processing is that DSP finds broad application in the fields such as current electronics, information, control.The power supply of digital signaling system, generally selects switch power module and designed, designed power supply.But due to the instability of line voltage and the fluctuation of voltage, cause DSP reliability in the process of electrification reset to decrease, and then cause its properties of product to decline to some extent.Therefore, DSP power supply need be processed emphatically for the problems referred to above in design.
Utility model content
The technical problem to be solved in the present invention is to provide a kind of power circuit, can effectively improve the reliability of DSP electrification reset.
For solving the problems of the technologies described above, the utility model provides a kind of DSP utility power circuit, includes reduction voltage circuit, rectification circuit, filtering circuit and mu balanced circuit, and described reduction voltage circuit is comprised of transformer; Described rectification circuit is comprised of bridge rectifier diode; Described filtering circuit is comprised of a plurality of electrochemical capacitors; Described mu balanced circuit is comprised of switch voltage-stabilizing integrated circuit.Described DSP utility power circuit includes voltage threshold circuit and delay circuit.Described voltage threshold circuit is comprised of voltage stabilizing diode and resistance; Described delay circuit is comprised of polypropylene capactive and resistance.
Described reduction voltage circuit adopts the transformer of 220V/16V; Described filtering circuit adopts the electrolytic condenser of 100 μ F/63V and the electrolytic condenser of 100 μ F/16V; Described mu balanced circuit is selected the switch voltage-stabilizing integrated circuit of LM2575-5.0V.
Described voltage threshold circuit is in series and is formed by voltage stabilizing diode and two resistance.After described voltage threshold circuit is arranged on filtering circuit.In described voltage threshold circuit, voltage stabilizing diode is selected 1N4742 type voltage stabilizing diode, and two resistance all adopt the resistance of 10K Ω.
Described delay circuit is in series and is formed by polypropylene capactive and resistance.On described delay circuit, be in series with the transistor that controlled by voltage threshold circuit.After described delay circuit is arranged on voltage threshold circuit, described switch voltage-stabilizing integrated circuit is controlled its work by delay circuit.In described delay circuit, polypropylene capactive is selected CBB-104-630V type polypropylene capactive, and resistance is selected the resistance of 100K Ω.Described transistor is selected 9013 type transistors.
In work, after line voltage input, after transformer pressure-reducing, bridge rectifier diode rectification and a filtering of electrolytic condenser, by voltage threshold circuit, carry out the detection of voltage threshold, guarantee that its voltage reaches the effect on the burning voltage of voltage stabilizing diode.After this delay circuit 10 milliseconds of starting switch integrated regulator work of time delay again, thus realize the step variation that electric power output voltage 0 arrives 5V.Power supply after voltage stabilizing is undertaken after secondary filtering by electrolytic condenser, can be for DSP.
Than prior art, the utlity model has following advantage:
1) threshold circuit is set in circuit, can carry out threshold detection for input voltage, guarantee that input voltage can arrive voltage stabilizing diode setting voltage, guaranteed the stability after voltage input simultaneously, the unstable phenomenon of electric power output voltage of having avoided the voltage fluctuation of line voltage and having caused, the reliability of raising DSP electrification reset;
2) delay circuit is set in circuit, can make the function of starting switch integrated regulator LM2575 after 10 milliseconds of circuit delay, the step that realizes electric power output voltage 0 to 5V changes, thereby by avoiding the voltage fluctuation time, avoided the formed instability of voltage fluctuation simultaneously, guaranteed the complete success of DSP electrification reset process;
3) switch voltage-stabilizing integrated circuit is selected LM2575, its inner integrated fixing oscillator, and seldom peripheral components just can form a kind of efficient mu balanced circuit, can greatly reduce the volume of heat radiator, and in most of the cases not need heat radiator; There is perfect holding circuit its inside, comprises current limit and hot breaking circuit etc.; Chip can provide external control pin simultaneously, is convenient to the control of delay circuit to it.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Reference numerals list:
ACL-interchange live wire, ACN-interchange zero line, T1-transformer, B1-bridge rectifier diode, CD1, CD2-electrolytic condenser, D1-voltage stabilizing diode, D2-diode, R1, R2, R2-resistance, CBB1-polypropylene capactive, Q1-transistor, P1-switch voltage-stabilizing integrated circuit, L1-inductance.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the utility model, should understand following embodiment and only for the utility model is described, be not used in restriction scope of the present utility model.It should be noted that, word 'fornt', 'back', " left side ", " right side ", "up" and "down" that use is described below refer to the direction in accompanying drawing, and word " interior " and " outward " refer to respectively the direction towards or away from specific features geometric center.
DSP utility power circuit as shown in Figure 1, includes reduction voltage circuit, rectification circuit, filtering circuit and mu balanced circuit, and described reduction voltage circuit is comprised of transformer T1; Described rectification circuit is comprised of bridge rectifier diode B1; Described filtering circuit is comprised of electrochemical capacitor CD1 and CD2; Described mu balanced circuit is comprised of switch voltage-stabilizing integrated circuit P1.Described DSP utility power circuit includes voltage threshold circuit and delay circuit.Described voltage threshold circuit is comprised of voltage stabilizing diode D1 and resistance R 1, R2; Described delay circuit is comprised of polypropylene capactive CBB1 and resistance R 3.
Described reduction voltage circuit adopts the transformer T1 of 220V/16V; Described filtering circuit adopts the electrolytic condenser CD1 of 100 μ F/63V and the electrolytic condenser CD2 of 100 μ F/16V; Described mu balanced circuit is selected the switch voltage-stabilizing integrated circuit P1 of LM2575-5.0V.Switch voltage-stabilizing integrated circuit P1 selects LM2575, its inner integrated fixing oscillator, and seldom peripheral components just can form a kind of efficient mu balanced circuit, can greatly reduce the volume of heat radiator, and in most of the cases not need heat radiator; There is perfect holding circuit its inside, comprises current limit and hot breaking circuit etc.; Chip can provide external control pin simultaneously, is convenient to the control of delay circuit to it.
Described voltage threshold circuit is in series and is formed by voltage stabilizing diode D1 and two resistance R 1, R2.After described voltage threshold circuit is arranged on filtering circuit.In described voltage threshold circuit, voltage stabilizing diode D1 selects 1N4742 type voltage stabilizing diode, and two resistance all adopt the resistance of 10K Ω.
Described delay circuit is in series and is formed by polypropylene capactive CBB1 and resistance R 3.On described delay circuit, be in series with the transistor Q1 that controlled by voltage threshold circuit.After described delay circuit is arranged on voltage threshold circuit, described switch voltage-stabilizing integrated circuit is controlled its work by delay circuit.In described delay circuit, polypropylene capactive CBB1 selects CBB-104-630V type polypropylene capactive, and resistance R 3 is selected the resistance of 100K Ω.Described transistor is selected 9013 type transistors.
In work, after line voltage input, after transformer T1 step-down, bridge rectifier diode B1 rectification and a filtering of electrolytic condenser CD1, by voltage threshold circuit, carry out the detection of voltage threshold, guarantee that its voltage can reach on voltage stabilizing diode D2 burning voltage 12V.After this function of 10 milliseconds of starting switch integrated regulator P1 of delay circuit time delay, thus realize the step variation that electric power output voltage 0 arrives 5V.Through the voltage of voltage stabilizing after CD2 secondary filtering, can be for dsp system.
Threshold circuit is set in circuit, can carry out threshold detection for input voltage, guarantee that input voltage can arrive voltage stabilizing diode setting voltage, guaranteed the stability after voltage input simultaneously, the unstable phenomenon of electric power output voltage of having avoided the voltage fluctuation of line voltage and having caused, the reliability of raising DSP electrification reset.Delay circuit is set in circuit, can make the function of starting switch integrated regulator LM2575 after 10 milliseconds of circuit delay, the step that realizes electric power output voltage 0 to 5V changes, thereby by avoiding the voltage fluctuation time, avoided the formed instability of voltage fluctuation simultaneously, guaranteed the complete success of DSP electrification reset process.
The disclosed technological means of the utility model scheme is not limited only to the disclosed technological means of above-mentioned embodiment, also comprises the technical scheme being comprised of above technical characterictic combination in any.
Claims (6)
1. a DSP utility power circuit, includes reduction voltage circuit, rectification circuit, filtering circuit and mu balanced circuit, and described reduction voltage circuit is comprised of transformer; Described rectification circuit is comprised of bridge rectifier diode; Described filtering circuit is comprised of a plurality of electrochemical capacitors; Described mu balanced circuit is comprised of switch voltage-stabilizing integrated circuit; It is characterized in that, described DSP utility power circuit includes voltage threshold circuit and delay circuit; Described voltage threshold circuit is comprised of voltage stabilizing diode and resistance; Described delay circuit is comprised of polypropylene capactive and resistance.
2. according to DSP utility power circuit claimed in claim 1, it is characterized in that, described reduction voltage circuit adopts the transformer of 220V/16V; Described filtering circuit adopts respectively one, the electrolytic condenser of 100 μ F/63V and the electrolytic condenser of 100 μ F/16V; Described mu balanced circuit is selected the switch voltage-stabilizing integrated circuit of LM2575-5.0V.
3. according to DSP utility power circuit claimed in claim 1, it is characterized in that, described voltage threshold circuit is in series and is formed by voltage stabilizing diode and two resistance; After described voltage threshold circuit is arranged on filtering part.
4. according to DSP utility power circuit claimed in claim 3, it is characterized in that, in described voltage threshold circuit, voltage stabilizing diode is selected 1N4742 type voltage stabilizing diode, and two resistance all adopt the resistance of 10K Ω.
5. according to DSP utility power circuit claimed in claim 1, it is characterized in that, described delay circuit is in series and is formed by polypropylene capactive and resistance; Described delay circuit is connected with the transistor that controlled by voltage threshold circuit; After described delay circuit is arranged on voltage threshold circuit, described switch voltage-stabilizing integrated circuit is controlled its work by delay circuit.
6. according to DSP utility power circuit claimed in claim 5, it is characterized in that, in described delay circuit, polypropylene capactive is selected CBB-104-630V type polypropylene capactive, and resistance is selected the resistance of 100K Ω; Described transistor is selected 9013 type transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320546635.2U CN203745944U (en) | 2013-09-04 | 2013-09-04 | DSP (Digital Signal Processor) practical power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320546635.2U CN203745944U (en) | 2013-09-04 | 2013-09-04 | DSP (Digital Signal Processor) practical power circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203745944U true CN203745944U (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320546635.2U Expired - Fee Related CN203745944U (en) | 2013-09-04 | 2013-09-04 | DSP (Digital Signal Processor) practical power circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160868A (en) * | 2018-03-29 | 2019-08-23 | 浙江中越检测技术服务有限公司 | A kind of textile toughness stretching force detecting apparatus |
-
2013
- 2013-09-04 CN CN201320546635.2U patent/CN203745944U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160868A (en) * | 2018-03-29 | 2019-08-23 | 浙江中越检测技术服务有限公司 | A kind of textile toughness stretching force detecting apparatus |
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| 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: 20140730 Termination date: 20160904 |
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| CF01 | Termination of patent right due to non-payment of annual fee |