CN208226889U

CN208226889U - Single-chip microcontroller voltage regulation filtering power supply

Info

Publication number: CN208226889U
Application number: CN201820399059.6U
Authority: CN
Inventors: 向立
Original assignee: Chengdu Euro Du System Technology Co Ltd
Current assignee: Chengdu Euro Du System Technology Co Ltd
Priority date: 2018-03-22
Filing date: 2018-03-22
Publication date: 2018-12-11
Anticipated expiration: 2028-03-22

Abstract

The utility model discloses a kind of single-chip microcontroller voltage regulation filtering power supplys, including first resistor, second resistance, 3rd resistor and the 4th resistance；First capacitor, the second capacitor, third capacitor, the 4th capacitor and the 5th capacitor；First diode, the second diode, field-effect tube, transistor, controllable accurate source of stable pressure, transformer and rectifier bridge；The utility model single-chip microcontroller carries out AC-DC conversion by rectifier bridge with voltage regulation filtering power supply, it is realized and is filtered by first capacitor, multiplication of voltage is realized by diode, the second capacitor and third capacitor, partial pressure is realized by 3rd resistor, the 4th resistance, by the resistance value for adjusting the 4th resistance, but the adjusting to output voltage is realized, so as to flexibly control output voltage according to the service condition of single-chip microcontroller.

Description

Single-chip microcontroller voltage regulation filtering power supply

Technical field

The utility model relates to power circuit more particularly to a kind of single-chip microcontroller voltage regulation filtering power supplys.

Background technique

Single-chip microcontroller is a kind of IC chip, is using very large scale integration technology with data-handling capacity Central processor CPU, random access memory ram, read only memory ROM, it is a variety of I/O mouthfuls and interrupt system, timer/counter Etc. functions (may further include the circuits such as display driver circuit, pulse-width modulation circuit, analog multiplexer, A/D converter) collection At to the small and perfect microcomputer system constituted on one piece of silicon wafer, it is widely applied in industrial control field.Generally The supply voltage that uses of single-chip microcontroller for 5V, it is therefore desirable to alternating current is rectified by power circuit, complies with monolithic The work requirements of machine.When single-chip microcontroller operating power is larger, need timely to increase demand of the input voltage to adapt to high power consumption, Output voltage cannot be adjusted in traditional microcontroller power supply circuit, it is possible that supplying when needing to carry out overclocking work Electric insufficient situation, influences the normal use of single-chip microcontroller.

Utility model content

The purpose of this utility model is that solve the above-mentioned problems and provides a kind of single-chip microcontroller voltage regulation filtering power supply.

The utility model achieves the above object through the following technical schemes:

A kind of single-chip microcontroller voltage regulation filtering power supply, including,

First resistor, second resistance, 3rd resistor and the 4th resistance；

First capacitor, the second capacitor, third capacitor, the 4th capacitor and the 5th capacitor；

First diode, the second diode, field-effect tube, transistor, controllable accurate source of stable pressure, transformer and rectifier bridge；

Two input terminals of the transformer are electrically connected with the firewire of alternating current and zero curve respectively, and the first of the transformer Output end is electrically connected with the first end of the first input end of the rectifier bridge and second capacitor, and the second of the transformer is defeated Outlet is electrically connected with the second input terminal of the rectifier bridge, the cathode of the second end of second capacitor and second diode With the anode electrical connection of the first diode, the first end of the cathode of the first diode and the third capacitor and described The first end of first resistor is electrically connected, the second end of the first resistor respectively with the grid of the field-effect tube, the crystal The electrical connection of the cathode of the collector of pipe and the controllable accurate source of stable pressure, the cathode output end of the rectifier bridge and the described 2nd 2 The drain electrode electrical connection of the second end and the field-effect tube of positive, the described third capacitor of pole pipe, the source electrode of the field-effect tube Be electrically connected with the first end of the base stage of the transistor and the second resistance, the second end of the second resistance respectively with it is described The first end of the emitter of transistor, the first end of the 4th resistance and the 5th capacitor is electrically connected and is the power supply Cathode output end, the control terminal of the controllable accurate source of stable pressure respectively with the first end of the 4th capacitor, the 4th resistance Second end and the 3rd resistor first end electrical connection, the cathode output end of the rectifier bridge respectively with the first capacitor Second end, the second end of positive, described 4th capacitor of the controllable accurate source of stable pressure, the second end of the 5th capacitor and The second end of the 3rd resistor is electrically connected and is the cathode output end of the power supply.

Specifically, the power of the first resistor is 2W, resistance value is 2K Ω, and the power of the second resistance is 5W, resistance value For 0.1 Ω, the resistance value of the 3rd resistor is 470 Ω, and the resistance value of the 4th resistance is 2K Ω, the capacitance of the first capacitor For 4700 μ F, the capacitance of second capacitor is 10 μ F, and the capacitance of the third capacitor is 10 μ F, the capacitance of the 4th capacitor For 4.7 μ F, the capacitance of the 5th capacitor is 470 μ F, the model 4G4B41 of the rectifier bridge, the model of the field-effect tube For K790, the model TL431 of the controllable accurate source of stable pressure, the model 9013 of the transistor.

The utility model has the beneficial effects that:

The utility model single-chip microcontroller carries out AC-DC conversion by rectifier bridge with voltage regulation filtering power supply, passes through first capacitor reality It now filters, multiplication of voltage is realized by diode, the second capacitor and third capacitor, partial pressure is realized by 3rd resistor, the 4th resistance, is led to The resistance value of the 4th resistance is overregulated, but realizes the adjusting to output voltage, so as to according to the spirit of the service condition of single-chip microcontroller Control output voltage living.

Detailed description of the invention

Fig. 1 is the circuit diagram of single-chip microcontroller voltage regulation filtering power supply described in the utility model.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing:

This technology, which essentially consists in, protects the circuit structure, and concrete model and resistance, capacitor to each electronic component Deng parameter carried out detailed regulation, those skilled in the art can pass through circuit shown in FIG. 1 in its knowledge Figure is attached each electronic component, to realize that this technology needs purpose to be achieved, that is, solves to be surpassed There is the problem of electricity shortage when working in frequency；And should be circuit structure, as long as each electronic component is connected to become by conducting wire Its function can be thus achieved in one complete circuit, therefore no longer needs additional specific product structure.

As shown in Figure 1, a kind of the utility model single-chip microcontroller voltage regulation filtering power supply, including,

First resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4；

First capacitor C1, the second capacitor C2, third capacitor C3, the 4th capacitor C4 and the 5th capacitor C5；

First diode D1, the second diode D2, field-effect tube K, transistor VT, controllable accurate source of stable pressure TL, transformer T With rectifier bridge BR；

Two input terminals of transformer T are electrically connected with the firewire of alternating current and zero curve respectively, the first output end of transformer T It is electrically connected with the first end of the first input end of rectifier bridge BR and the second capacitor C2, the second output terminal and rectifier bridge of transformer T The second input terminal of BR is electrically connected, and the cathode and first diode D1 of the second end of the second capacitor C2 and the second diode D2 are just Pole electrical connection, the cathode of first diode D1 are electrically connected with the first end of the first end of third capacitor C3 and first resistor R1, the The second end of one resistance R1 is negative with the grid of field-effect tube K, the collector of transistor VT and controllable accurate source of stable pressure TL respectively Pole electrical connection, the second end and field-effect of the anode of the cathode output end of rectifier bridge BR and the second diode D2, third capacitor C3 The drain electrode of pipe K is electrically connected, and the source electrode of field-effect tube K is electrically connected with the first end of the base stage of transistor VT and second resistance R2, the The second end of the two resistance R2 first end with the emitter of transistor VT, the first end of the 4th resistance R4 and the 5th capacitor C5 respectively Electrical connection and be power supply cathode output end, the control terminal of controllable accurate source of stable pressure TL respectively with the first end of the 4th capacitor C4, The second end of 4th resistance R4 and the first end electrical connection of 3rd resistor R3, the cathode output end of rectifier bridge BR are electric with first respectively Hold the second end of C1, the anode of controllable accurate source of stable pressure TL, the second end of the 4th capacitor C4, the second end of the 5th capacitor C5 and the The second end of three resistance R3 is electrically connected and is the cathode output end of power supply.

The power of first resistor R1 is 2W, resistance value is 2K Ω, and the power of second resistance R2 is 5W, resistance value is 0.1 Ω, third The resistance value of resistance R3 is 470 Ω, and the resistance value of the 4th resistance R4 is 2K Ω, and the capacitance of first capacitor C1 is 4700 μ F, the second capacitor The capacitance of C2 is 10 μ F, and the capacitance that the capacitance of third capacitor C3 is 10 μ F, the 4th capacitor C4 is 4.7 μ F, the appearance of the 5th capacitor C5 Value is 470 μ F, the model K790 of the model 4G4B41 of rectifier bridge BR, field-effect tube K, the model of controllable accurate source of stable pressure TL For TL431, the model 9013 of transistor VT.

The utility model single-chip microcontroller is as follows with the working principle of voltage regulation filtering power supply:

220v voltage is depressured through transformer T, rectifier bridge BR is rectified, first capacitor C1 is filtered.

First diode D1, the second diode D2, the second capacitor C2 and third capacitor C3 composition voltage-multiplying circuit are (so that Vdc =60V), the 4th resistance R4 and 3rd resistor R3 form bleeder circuit, and controllable accurate source of stable pressure TL and first resistor R1 composition take Sample amplifying circuit, transistor VT and second resistance R2 form current-limiting protection circuit, and field-effect tube K, the 5th capacitor C5 are exported Filter.

When needing output voltage to increase, the resistance value of the 4th resistance R4 is adjusted, so that f point current potential reduces, through controllable accurate Amplification increases e point voltage inside source of stable pressure TL, and after field-effect tube K adjustment, b point current potential is increased, and output voltage increases；Instead It adjusts the resistance value of the 4th resistance R4 when needing output voltage to reduce, so that f point current potential increases, e point current potential is reduced, through field After effect pipe K adjustment, b point current potential is reduced, and output voltage reduces.

The limitation that the technical solution of the utility model is not limited to the above specific embodiments, all skills according to the present utility model The technology deformation that art scheme is made, each falls within the protection scope of the utility model.

Claims

1. a kind of single-chip microcontroller voltage regulation filtering power supply, it is characterised in that: including,

First resistor, second resistance, 3rd resistor and the 4th resistance；

Two input terminals of the transformer are electrically connected with the firewire of alternating current and zero curve respectively, the first output of the transformer End is electrically connected with the first end of the first input end of the rectifier bridge and second capacitor, the second output terminal of the transformer It is electrically connected with the second input terminal of the rectifier bridge, the cathode and institute of the second end of second capacitor and second diode State the anode electrical connection of first diode, the first end and described first of the cathode of the first diode and the third capacitor The first end of resistance is electrically connected, the second end of the first resistor respectively with the grid of the field-effect tube, the transistor The electrical connection of the cathode of collector and the controllable accurate source of stable pressure, the cathode output end of the rectifier bridge and second diode Positive, described third capacitor second end and the field-effect tube drain electrode electrical connection, the source electrode of the field-effect tube and institute State transistor base stage and the second resistance first end electrical connection, the second end of the second resistance respectively with the crystal The first end of the emitter of pipe, the first end of the 4th resistance and the 5th capacitor is electrically connected and is the anode of the power supply Output end, the control terminal of the controllable accurate source of stable pressure respectively with the first end of the 4th capacitor, the 4th resistance The electrical connection of the first end of two ends and the 3rd resistor, the cathode output end of the rectifier bridge respectively with the first capacitor the Two ends, the second end of positive, described 4th capacitor of the controllable accurate source of stable pressure, the second end of the 5th capacitor and described The second end of 3rd resistor is electrically connected and is the cathode output end of the power supply.

2. single-chip microcontroller according to claim 1 voltage regulation filtering power supply, it is characterised in that: the power of the first resistor is 2W, resistance value are 2K Ω, and the power of the second resistance is 5W, resistance value is 0.1 Ω, and the resistance value of the 3rd resistor is 470 Ω, institute The maximum value for stating the 4th resistance is 5.1K Ω, and the capacitance of the first capacitor is 4700 μ F, and the capacitance of second capacitor is 10 μ F, the capacitance of the third capacitor are 10 μ F, and the capacitance of the 4th capacitor is 4.7 μ F, and the capacitance of the 5th capacitor is 470 μ F, the model 4G4B41 of the rectifier bridge, the model K790 of the field-effect tube, the controllable accurate source of stable pressure Model TL431, the model 9013 of the transistor.