CN203259915U - Single-chip microcomputer high-power PWM output circuit - Google Patents
Single-chip microcomputer high-power PWM output circuit Download PDFInfo
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- CN203259915U CN203259915U CN 201320240304 CN201320240304U CN203259915U CN 203259915 U CN203259915 U CN 203259915U CN 201320240304 CN201320240304 CN 201320240304 CN 201320240304 U CN201320240304 U CN 201320240304U CN 203259915 U CN203259915 U CN 203259915U
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- 239000004065 semiconductor Substances 0.000 claims description 37
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 238000002955 isolation Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 240000007320 Pinus strobus Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Abstract
The utility model relates to a single-chip microcomputer high-power PWM output circuit. The circuit comprises a PMW signal output circuit, an isolating circuit, an MOS transistor power circuit and an MOS transistor driving circuit. The MOS transistor driving circuit is connected with a load bearing device, and the purpose that a PMW signal conducts high-power drive on the load bearing device is achieved. Optical coupling isolation is applied to the isolating circuit. The single-chip microcomputer high-power PWM output circuit is simple in structure, easy to achieve, suitable for large-current single-device drive which is low in requirement, low in cost and capable of not increasing the circuit design difficulty.
Description
Technical field
The utility model relates to singlechip technology, particularly the high-power PWM output circuit of a kind of single-chip microcomputer.
Background technology
The driving load maximum current of present SCM PWM export technique is 10mA, needs the occasion of large electric current just can't realize driving at some, such as stepper motor, speed-regulating fan etc., and the electric current that they need is all more than 1A.Independent SCM PWM export technique can't satisfy this demand, and the high-power output circuit of existing PWM more complicated all is not suitable for the driving of the equipment such as single motor, fan.
The utility model content
For addressing the above problem, the utility model provides a kind of single-chip microcomputer high-power PWM output circuit.
The technical scheme that the utility model adopts is: the high-power PWM output circuit of a kind of single-chip microcomputer, comprise the pwm signal output circuit, buffer circuit, the metal-oxide-semiconductor driving circuit that connect successively, also comprise the metal-oxide-semiconductor power circuit, described metal-oxide-semiconductor driving circuit is connected with load equipment, realizes that pwm signal is to the high-power driving of load equipment.
Overcurrent-overvoltage protecting circuit preferably is set, and this overcurrent-overvoltage protecting circuit is connected with the metal-oxide-semiconductor driving circuit, realizes that safety drives.
Described buffer circuit adopts light-coupled isolation.Described buffer circuit adopts optocoupler U1, U1 input end diode cathode connects direct supply VCC by the first current-limiting resistance, U1 input end diode cathode connects the pwm signal output circuit, output terminal phototriode emitter grounding, collector connects the metal-oxide-semiconductor driving circuit, and this collector connects the metal-oxide-semiconductor power circuit by the second current-limiting resistance simultaneously.
Described metal-oxide-semiconductor power circuit adopts high-power DC power supply to add the directly mode of output of stabilivolt.Described metal-oxide-semiconductor power circuit comprises the 3rd current-limiting resistance and the stabilivolt that is connected in series, and described stabilivolt voltage stabilizing end connects the 3rd current-limiting resistance and is connected with high-power DC power supply by the 3rd current-limiting resistance.
Described metal-oxide-semiconductor driving circuit adopts step by step amplification mode of three triodes to drive.
Compared with prior art, simple, the easily realization of the utility model circuit structure is suitable for less demanding large electric current single equipment and drives, and cost is lower, does not increase the circuit design difficulty.
Description of drawings
Fig. 1 is the high-power PWM output circuit of single-chip microcomputer described in the utility model composition frame chart;
Fig. 2 is described metal-oxide-semiconductor power circuit and buffer circuit embodiment schematic diagram.
Fig. 3 is described metal-oxide-semiconductor driving circuit embodiment schematic diagram.
Embodiment
For the ease of those skilled in the art's understanding, below in conjunction with specific embodiment and accompanying drawing the utility model theory of constitution is described in further detail.
As shown in Figure 1, the high-power PWM output circuit of single-chip microcomputer described in the utility model comprises pwm signal output circuit, buffer circuit, metal-oxide-semiconductor power circuit and metal-oxide-semiconductor driving circuit, the pwm signal output circuit is by the single-chip microcomputer output pwm signal, this signal is exported to the metal-oxide-semiconductor driving circuit by buffer circuit, amplify the driving load equipment by the metal-oxide-semiconductor driving circuit, realize that pwm signal is to the high-power driving of load equipment.The metal-oxide-semiconductor power circuit provides energy source for the metal-oxide-semiconductor driving circuit.
Such as Fig. 2,3, optocoupler U1, current-limiting resistance R1 form optical coupling isolation circuit; Current-limiting resistance R2 and stabilivolt Z1, capacitor C 1 form the metal-oxide-semiconductor power circuit; Triode Q1, Q2, Q3 and metal-oxide-semiconductor T1 form the metal-oxide-semiconductor driving circuit.Wherein, U1 input end diode cathode connects direct supply VCC by current-limiting resistance R1, and U1 input end diode cathode connects the pwm signal output circuit, output terminal phototriode emitter grounding, and collector connects the first order triode in the metal-oxide-semiconductor driving circuit.Described stabilivolt voltage stabilizing end connects the second current-limiting resistance and is connected stabilivolt other end ground connection with high-power DC power supply by the second current-limiting resistance; Stabilivolt voltage stabilizing end connects the metal-oxide-semiconductor driving circuit as the output terminal of metal-oxide-semiconductor power circuit; Capacitor C 1 is connected in parallel on stabilivolt Z1 two ends, strobes.Triode Q1, Q2, Q3 collector connect the metal-oxide-semiconductor power circuit by resistance respectively, and base stage connects successively the prime transistor collector and forms amplifying circuit, triode Q1, Q2 emitter grounding, and triode Q3 emitter-base bandgap grading connects metal-oxide-semiconductor T1.The pwm signal access triode Q1 base stage of buffer circuit output is successively after triode Q1, Q2, Q3 amplify, by triode Q3 emitter-base bandgap grading output driven MOS pipe T1.
Need to prove, not breaking away under the utility model design prerequisite its any subtle change of doing and being equal to replacement, all should belong to protection domain of the present utility model.
Claims (5)
1. the high-power PWM output circuit of single-chip microcomputer, it is characterized in that: comprise the pwm signal output circuit, buffer circuit, the metal-oxide-semiconductor driving circuit that connect successively, also comprise the metal-oxide-semiconductor power circuit, described metal-oxide-semiconductor driving circuit is connected with load equipment, realizes that pwm signal is to the high-power driving of load equipment.
2. the high-power PWM output circuit of single-chip microcomputer according to claim 1, it is characterized in that: also be provided with overcurrent-overvoltage protecting circuit, described overcurrent-overvoltage protecting circuit is connected with the metal-oxide-semiconductor driving circuit.
3. the high-power PWM output circuit of single-chip microcomputer according to claim 1, it is characterized in that: described buffer circuit adopts optocoupler U1, U1 input end diode cathode connects direct supply VCC by the first current-limiting resistance, U1 input end diode cathode connects the pwm signal output circuit, output terminal phototriode emitter grounding, collector connects the metal-oxide-semiconductor driving circuit, and this collector connects the metal-oxide-semiconductor power circuit by the second current-limiting resistance simultaneously.
4. the high-power PWM output circuit of single-chip microcomputer according to claim 1, it is characterized in that: described metal-oxide-semiconductor power circuit comprises the 3rd current-limiting resistance and the stabilivolt that is connected in series, described stabilivolt voltage stabilizing end connects the 3rd current-limiting resistance and is connected stabilivolt other end ground connection with high-power DC power supply by the 3rd current-limiting resistance; Stabilivolt voltage stabilizing end connects the metal-oxide-semiconductor driving circuit as the output terminal of metal-oxide-semiconductor power circuit.
5. the high-power PWM output circuit of single-chip microcomputer according to claim 1, it is characterized in that: described metal-oxide-semiconductor driving circuit comprises metal-oxide-semiconductor T1, triode Q1, Q2, Q3; Triode Q1, Q2, Q3 collector connect the metal-oxide-semiconductor power circuit by resistance respectively, base stage connects successively the prime transistor collector and forms amplifying circuit, the pwm signal access triode Q1 base stage of buffer circuit output, successively after triode Q1, Q2, Q3 amplify, by triode Q3 emitter-base bandgap grading output driven MOS pipe T1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320240304 CN203259915U (en) | 2013-05-07 | 2013-05-07 | Single-chip microcomputer high-power PWM output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320240304 CN203259915U (en) | 2013-05-07 | 2013-05-07 | Single-chip microcomputer high-power PWM output circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203259915U true CN203259915U (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320240304 Expired - Fee Related CN203259915U (en) | 2013-05-07 | 2013-05-07 | Single-chip microcomputer high-power PWM output circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238593A (en) * | 2014-09-17 | 2014-12-24 | 张静 | Novel efficient temperature controller |
| CN107039947A (en) * | 2017-05-15 | 2017-08-11 | 南京昶达新材料技术有限公司 | A kind of output circuit with short-circuit protection |
| CN112350621A (en) * | 2020-10-29 | 2021-02-09 | 南京理工大学 | Driving circuit applied to brushless motor |
-
2013
- 2013-05-07 CN CN 201320240304 patent/CN203259915U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238593A (en) * | 2014-09-17 | 2014-12-24 | 张静 | Novel efficient temperature controller |
| CN107039947A (en) * | 2017-05-15 | 2017-08-11 | 南京昶达新材料技术有限公司 | A kind of output circuit with short-circuit protection |
| CN107039947B (en) * | 2017-05-15 | 2019-02-26 | 南京昶达新材料技术有限公司 | A kind of output circuit with short-circuit protection |
| CN112350621A (en) * | 2020-10-29 | 2021-02-09 | 南京理工大学 | Driving circuit applied to brushless motor |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 Termination date: 20200507 |