CN203352446U - DC-DC voltage conversion circuit - Google Patents

Abstract

The utility model discloses a DC-DC voltage conversion circuit. The circuit comprises a recovery diode D602, a glass packaging development diode D603, a glass packaging development diode D604, a glass packaging development diode D605, a glass packaging development diode D606, a transformer B601, a capacitor C10, a capacitor C11, a capacitor C12, an electrolytic capacitor C603, an electrolytic capacitor C605, a resistor R12, a 78L05 three-terminal stabilized voltage power supply regulator T601 and an IRFU110 field effect transistor M601. The circuit is low in power consumption, high in precision, and suitable for systems requiring high precision.

Description

A kind of DC-DC DC voltage converting circuit

Technical field

The utility model belongs to the Power supply technical field, relates to a kind of DC-DC DC voltage converting circuit that is applied to communication apparatus etc.

Background technology

The DC-DC DC voltage converting circuit is a kind of direct voltage to be converted to the circuit topology of another kind of direct voltage.What the words of general small power DC voltage conversion circuit were used is the Buck(buck) and Boost(boost) pattern.High-powerly just adopt flyback, half-bridge, recommend or the circuit topology of full-bridge.Divide according to structure the difference that isolation and non-isolation are arranged, that namely isolates will be inputted with output and be carried out electrical isolation by transformer, and energy is delivered to output by magnetic energy.But not the isolation by switching tube, directly change exactly.For example a DC-DC DC voltage converting circuit the simplest is exactly onboard charger, on car, the voltage of storage battery is generally DC10-14.5V, the voltage that is 5V by the Buck circuit conversion of a DC-DC, can charge the phone, and if can be converted to about 19V and can charge to notebook computer with the Boost circuit.This DC-DC DC voltage converting circuit circuit used is switching mode, is a Switching Power Supply.Its efficiency is very high, energy-conservation.Generally can reach 90% left and right.So can reach extensive use.If the use linear circuit, conversion efficiency can be very low, loses most energy.At present use seldom.

Summary of the invention

The utility model, for the deficiencies in the prior art, provides a kind of DC-DC DC voltage converting circuit.

The utility model is by the following technical solutions:

The DC-DC DC voltage converting circuit, comprise recovery diode D602, glass packaging exploitation diode D603, glass packaging exploitation diode D604, glass packaging exploitation diode D605, glass packaging exploitation diode D606, transformer B601, capacitor C 10, capacitor C 11, capacitor C 12, electrochemical capacitor C603, electrochemical capacitor C605, resistance R 12,78L05 three-terminal voltage-stabilizing feed regulator isolator T601, IRFU110 field effect transistor M601.Recovery diode D602 plus earth, negative electrode connects transformer B601 primary side one end, input direct voltage VCC connects respectively an end of capacitor C 10, the primary side other end of transformer B601, the end of the other end connecting resistance R12 of capacitor C 10, the primary side that the other end of resistance R 12 meets respectively IRFU110 field effect transistor M601 drain electrode, transformer B601 is an end again; IRFU110 field effect transistor M601 drain-source ground connection, grid connects input frequency signal.

Glass packaging exploitation diode D603 anode connects respectively secondary side one end of glass packaging exploitation diode D605 negative electrode, connection transformer B601, and glass packaging exploitation diode D604 anode connects respectively the secondary side other end of glass packaging exploitation diode D606 negative electrode, connection transformer B601; 3 pin of glass packaging exploitation diode D603 negative electrode, glass packaging exploitation diode D604 negative electrode, electrochemical capacitor C603 positive pole, capacitor C 11 1 termination 78L05 three-terminal voltage-stabilizing feed regulator isolator T601; The 2 pin ground connection of glass packaging exploitation diode D605 anode, glass packaging exploitation diode D606 anode, electrochemical capacitor C603 negative pole, capacitor C 11 other ends, 78L05 three-terminal voltage-stabilizing feed regulator isolator T601; 1 pin of 78L05 three-terminal voltage-stabilizing feed regulator isolator T601 connects respectively the positive pole of electrochemical capacitor C605, an end of capacitor C 12, and as DC voltage output end, the other end ground connection of the negative pole of electrochemical capacitor C605, capacitor C 12.

The utility model beneficial effect: this circuit power consumption is low, and precision is high, is applicable in system that claimed accuracy is high.

The accompanying drawing explanation

Fig. 1 is circuit theory diagrams of the present utility model.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, the utility model comprises recovery diode D602, glass packaging exploitation diode D603, glass packaging exploitation diode D604, glass packaging exploitation diode D605, glass packaging exploitation diode D606, transformer B601, capacitor C 10, capacitor C 11, capacitor C 12, electrochemical capacitor C603, electrochemical capacitor C605, resistance R 12,78L05 three-terminal voltage-stabilizing feed regulator isolator T601, IRFU110 field effect transistor M601, recovery diode D602 is along conducting direction one end ground connection, one termination transformer B601 primary side, input direct voltage VCC receives the primary side of transformer B601, also receive the primary side of transformer B601 after the whole VCC in parallel of capacitor C 10 connecting resistance R12, IRFU110 field effect transistor M601 drain electrode connecting resistance R12 is by the side of transformer B601, source ground, grid connects input frequency signal, glass packaging exploitation diode D603, glass packaging exploitation diode D604, glass packaging exploitation diode D605 and glass packaging exploitation diode D606 connect to form the secondary side of bridge rectifier left side connection transformer B601, the right be connected in parallel capacitor C 12 and electrochemical capacitor C603, afterwards positive ends is connected to the Vin mouth of 78L05 three-terminal voltage-stabilizing feed regulator isolator T601, the GND mouth that the negative polarity end is connected to 78L05 three-terminal voltage-stabilizing feed regulator isolator T601, finally will after capacitor C 12 and electrochemical capacitor C605 parallel connection, form output filter circuit, the Vout mouth that positive ends is connected to 78L05 three-terminal voltage-stabilizing feed regulator isolator T601, the negative polarity end connects the GND mouth of 78L05 three-terminal voltage-stabilizing feed regulator isolator T601.Recovery diode D602 is the port for disconnecting transformer B601 mono-side, capacitor C 10 and resistance R 12 play filtering and the metering function to the input direct-current signal, IRFU110 field effect transistor M601 regenerates by direct current signal the AC signal needed after receiving frequency signal, by transformer B601 with the ratio of needs by the AC signal convergent-divergent, played the effect of electrical isolation simultaneously, the voltage signal of the secondary side of transformer B601 output afterwards is through developing diode D603 by glass packaging, glass packaging exploitation diode D604, after connecting to form bridge rectifier, glass packaging exploitation diode D605 and glass packaging exploitation diode D606 be rectified into direct current signal, be connected to 78L05 three-terminal voltage-stabilizing feed regulator isolator T601 after the filter circuit that this direct current signal forms by electrochemical capacitor C603 and capacitor C 11 again, afterwards the precision of output higher+the 5V direct current signal by and the filter action of the same before filter circuit formed by electrochemical capacitor C605 and capacitor C 12 after finally the required precision of generation system very high+the 5V d. c. voltage signal.

Claims (1)

1. a DC-DC DC voltage converting circuit, comprise recovery diode D602, glass packaging exploitation diode D603, glass packaging exploitation diode D604, glass packaging exploitation diode D605, glass packaging exploitation diode D606, transformer B601, capacitor C 10, capacitor C 11, capacitor C 12, electrochemical capacitor C603, electrochemical capacitor C605, resistance R 12, 78L05 three-terminal voltage-stabilizing feed regulator isolator T601, IRFU110 field effect transistor M601, it is characterized in that: recovery diode D602 plus earth, negative electrode connects transformer B601 primary side one end, input direct voltage VCC connects respectively an end of capacitor C 10, the primary side other end of transformer B601, the end of the other end connecting resistance R12 of capacitor C 10, the other end of resistance R 12 connects respectively IRFU110 field effect transistor M601 drain electrode, the primary side of transformer B601 is an end again, IRFU110 field effect transistor M601 drain-source ground connection, grid connects input frequency signal,

Glass packaging exploitation diode D603 anode connects respectively secondary side one end of glass packaging exploitation diode D605 negative electrode, connection transformer B601, and glass packaging exploitation diode D604 anode connects respectively the secondary side other end of glass packaging exploitation diode D606 negative electrode, connection transformer B601; 3 pin of glass packaging exploitation diode D603 negative electrode, glass packaging exploitation diode D604 negative electrode, electrochemical capacitor C603 positive pole, capacitor C 11 1 termination 78L05 three-terminal voltage-stabilizing feed regulator isolator T601; The 2 pin ground connection of glass packaging exploitation diode D605 anode, glass packaging exploitation diode D606 anode, electrochemical capacitor C603 negative pole, capacitor C 11 other ends, 78L05 three-terminal voltage-stabilizing feed regulator isolator T601; 1 pin of 78L05 three-terminal voltage-stabilizing feed regulator isolator T601 connects respectively the positive pole of electrochemical capacitor C605, an end of capacitor C 12, and as DC voltage output end, the other end ground connection of the negative pole of electrochemical capacitor C605, capacitor C 12.