CN203225664U

CN203225664U - Power supply circuit based on single-chip microcomputer

Info

Publication number: CN203225664U
Application number: CN 201320176486
Authority: CN
Inventors: 王东旭
Original assignee: Chengdu Asiayak Technology Co Ltd
Current assignee: Chengdu Asiayak Technology Co Ltd
Priority date: 2013-04-10
Filing date: 2013-04-10
Publication date: 2013-10-02
Anticipated expiration: 2023-04-10

Abstract

The utility model discloses a power supply circuit based on a single-chip microcomputer. The power supply circuit includes a fuse, a transformer, a rectifier circuit, seven capacitors from the first to the seventh, four resistors from the first to the fourth, the single-chip microcomputer, an inductor and a diode. Voltage of an AC power supply is reduced via the transformer, and then after rectification via the rectifier circuit and filtering via the first capacitor, DC voltage is obtained and taken as input voltage of the single-chip microcomputer. When output voltage is directly connected with a tenth pin of the single-chip microcomputer, the output voltage can vary continuously from 5V to 40V through adjustment of the fourth resistor. By use of the single-chip microcomputer to constitute the power supply circuit, the power supply circuit based on the single-chip microcomputer is suitable for a variety of electrical or electronic devices, has a simple structure and fewer components and is low in cost and small in size. Product size and weight can be reduced, and therefore the power supply circuit based on the single-chip microcomputer is conducive to popularization.

Description

SCM Based power circuit

Technical field

The utility model relates to a kind of power circuit, relates in particular to a kind of SCM Based power circuit.

Background technology

The power circuit electric power system that in the middle of various power equipments and electronic equipment, all is absolutely necessary, but power circuit adopts the bigger electronic component of coil transformer equal-volume mostly in the prior art, therefore cause that small product size is big, cost is high, power consumption is high, even influence properties of product.

The utility model content

The purpose of this utility model provides a kind of SCM Based power circuit with regard to being in order to address the above problem.

The utility model is achieved through the following technical solutions above-mentioned purpose:

The utility model comprises fuse, transformer, rectification circuit, first electric capacity to the, seven electric capacity, first resistance to the, four resistance, single-chip microcomputer, inductance and diode, elementary and the AC power of described transformer is connected, described fuse is series on the primary wires of described transformer, the input of the secondary and described rectification circuit of described transformer is connected, the cathode output end of described rectification circuit is connected with first end of described first electric capacity and the 7th pin of described single-chip microcomputer simultaneously, the cathode output end while of described rectification circuit and second end of described first electric capacity, first end of described the 3rd resistance, first end of described the 5th electric capacity, the 4th pin of described single-chip microcomputer, first end of described second resistance, first end of described the 4th electric capacity, first end of described the 3rd electric capacity is connected with first end of described second electric capacity, second end of described second electric capacity is connected with first end of described first resistance, second end of described first resistance is connected with second end of described the 3rd electric capacity and the 11 pin of described single-chip microcomputer simultaneously, second end of described the 4th electric capacity is connected with second end of described second resistance and the 14 pin of described single-chip microcomputer simultaneously, second end of described the 5th electric capacity is connected with the 15 pin of described single-chip microcomputer, second end of described the 3rd resistance is connected with first end of described the 4th resistance and the tenth pin of described single-chip microcomputer simultaneously, second end while of described the 4th resistance and first end of described the 6th electric capacity, first end of described inductance is connected with first end of described the 7th electric capacity, second end of described the 7th electric capacity is connected with second end of described the 6th electric capacity and the positive pole of described diode simultaneously, the negative pole of described diode is connected with second end of described inductance and second pin of described single-chip microcomputer simultaneously, the cathode output end of described rectification circuit is the cathode output end of described power circuit, and first end of described inductance is the cathode output end of described rectification circuit.

The beneficial effects of the utility model are:

The utility model adopts single-chip microcomputer to constitute power circuit, is applicable to multiple power equipment or electronic equipment, have simple in structure, adopt that element is few, cost is low, volume is little, can dwindle small product size, alleviates product weight, be conducive to promote.

Description of drawings

Fig. 1 is circuit structure schematic diagram of the present utility model.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

As shown in Figure 1: the utility model comprises fuse FU, transformer T, rectification circuit DR, first capacitor C, 1 to the 7th capacitor C 7, first resistance R, 1 to the 4th resistance R 4, single-chip microcomputer IC, inductance L and diode VD, elementary and the AC power of transformer T is connected, fuse FU is series on the primary wires of transformer T, the secondary input with rectification circuit DR of transformer T is connected, the cathode output end of rectification circuit DR is connected with first end of first capacitor C 1 and the 7th pin of single-chip microcomputer IC simultaneously, the cathode output end while of rectification circuit DR and second end of first capacitor C 1, first end of the 3rd resistance R 3, first end of the 5th capacitor C 5, the 4th pin of single-chip microcomputer IC, first end of second resistance R 2, first end of the 4th capacitor C 4, first end of the 3rd capacitor C 3 is connected with first end of second capacitor C 2, second end of second capacitor C 2 is connected with first end of first resistance R 1, second end of first resistance R 1 is connected with second end of the 3rd capacitor C 3 and the 11 pin of single-chip microcomputer IC simultaneously, second end of the 4th capacitor C 4 is connected with second end of second resistance R 2 and the 14 pin of single-chip microcomputer IC simultaneously, second end of the 5th capacitor C 5 is connected with the 15 pin of single-chip microcomputer IC, second end of the 3rd resistance R 3 is connected with first end of the 4th resistance R 4 and the tenth pin of single-chip microcomputer IC simultaneously, second end while of the 4th resistance R 4 and first end of the 6th capacitor C 6, first end of inductance L is connected with first end of the 7th capacitor C 7, second end of the 7th capacitor C 7 is connected with second end of the 6th capacitor C 6 and the positive pole of diode VD simultaneously, the negative pole of diode VD is connected with second end of inductance L and second pin of single-chip microcomputer IC simultaneously, the cathode output end of rectification circuit DR is the cathode output end of power circuit, and first end of inductance L is the cathode output end of rectification circuit DR.

As shown in Figure 1: AC power is through transformer T step-down, again through obtaining direct voltage V1 after distillation circuit DR rectification and 1 filtering of first capacitor C, input voltage as single-chip microcomputer IC, when output voltage V 0 the tenth pin direct and single-chip microcomputer IC is connected, voltage stabilizing value V0=5V, now get the 4th resistance R 4=15 kilo-ohm, the 3rd resistance R 3=2.2 kilo-ohm, adjust the 4th resistance R 4 and can make V0 vary continuously to 40V from 5V.

Claims

1. SCM Based power circuit, it is characterized in that: comprise fuse, transformer, rectification circuit, first electric capacity to the, seven electric capacity, first resistance to the, four resistance, single-chip microcomputer, inductance and diode, elementary and the AC power of described transformer is connected, described fuse is series on the primary wires of described transformer, the input of the secondary and described rectification circuit of described transformer is connected, the cathode output end of described rectification circuit is connected with first end of described first electric capacity and the 7th pin of described single-chip microcomputer simultaneously, the cathode output end while of described rectification circuit and second end of described first electric capacity, first end of described the 3rd resistance, first end of described the 5th electric capacity, the 4th pin of described single-chip microcomputer, first end of described second resistance, first end of described the 4th electric capacity, first end of described the 3rd electric capacity is connected with first end of described second electric capacity, second end of described second electric capacity is connected with first end of described first resistance, second end of described first resistance is connected with second end of described the 3rd electric capacity and the 11 pin of described single-chip microcomputer simultaneously, second end of described the 4th electric capacity is connected with second end of described second resistance and the 14 pin of described single-chip microcomputer simultaneously, second end of described the 5th electric capacity is connected with the 15 pin of described single-chip microcomputer, second end of described the 3rd resistance is connected with first end of described the 4th resistance and the tenth pin of described single-chip microcomputer simultaneously, second end while of described the 4th resistance and first end of described the 6th electric capacity, first end of described inductance is connected with first end of described the 7th electric capacity, second end of described the 7th electric capacity is connected with second end of described the 6th electric capacity and the positive pole of described diode simultaneously, the negative pole of described diode is connected with second end of described inductance and second pin of described single-chip microcomputer simultaneously, the cathode output end of described rectification circuit is the cathode output end of described power circuit, and first end of described inductance is the cathode output end of described rectification circuit.