CN204517690U - Regulator rectifier circuit - Google Patents

Abstract

The utility model discloses a rectifying voltage stabilizing circuit, wherein, the VCC port includes a VCC positive port and a VCC negative port; the VCC positive port is simultaneously connected to one end of an inductance L1 and port 2 of a bridge rectifier D2 through a safety resistor FS; The other end of the inductance L1 is connected to the port 2 of the bridge rectifier D1; the port 1 of the bridge rectifier D2 is simultaneously connected to the negative pole of the diode D3 and the port 1 of the bridge rectifier D1; the port 4 of the bridge rectifier D2 is simultaneously connected to The port 4 of the bridge rectifier D1 is connected, and the port 4 of the bridge rectifier D1 is connected to the VCC negative port at the same time; the port 3 of the bridge rectifier D1 is connected to the positive pole of the diode D4 and the port 3 of the bridge rectifier D2 at the same time, and the bridge rectifier D1 The port 3 of the rectifier D2 is also connected to one end of the capacitor C1; the utility model has no safety hazard, good voltage stabilizing effect, and good rectifying effect.

Description

Rectifier voltage regulator circuit

technical field

The utility model relates to a rectifying and stabilizing circuit, in particular to a rectifying and stabilizing circuit.

Background technique

When AC mains is in use, it needs to be rectified, filtered and other multi-stage processing to make it a suitable DC to drive the corresponding load. In order to obtain a more stable DC output voltage, it is necessary to stabilize it before DC output. Yes; there are professional integrated circuit voltage regulator ICs on the market, which can protect the output short circuit, but the price is high and if you want to output different voltage values, you need to replace a different voltage regulator IC; the cost of using a triode to build a voltage regulator circuit is relatively high Low, but if there is an output short circuit, it will burn the triode and the output line, and there is a safety risk.

Utility model content

The purpose of the utility model is to provide a rectifying and stabilizing circuit with no safety hazard, good voltage stabilizing effect and good rectifying effect, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A rectification and voltage stabilization circuit, comprising a bridge rectifier D1, a bridge rectifier D2, a VCC port, a resistor Rr, and a transistor Q; wherein, the VCC port includes a VCC positive port and a VCC negative port; the VCC positive port passes through a fuse resistor FS at the same time Connect one end of the inductor L1 to port 2 of the bridge rectifier D2; the other end of the inductor L1 is connected to port 2 of the bridge rectifier D1; port 1 of the bridge rectifier D2 is simultaneously connected to the cathode of the diode D3 and the bridge rectifier D1 port 1 of the bridge rectifier D2; port 4 of the bridge rectifier D2 is connected to the port 4 of the bridge rectifier D1 at the same time, and the port 4 of the bridge rectifier D1 is connected to the negative port of VCC; the port 3 of the bridge rectifier D1 is connected to the diode at the same time The anode of D4 and port 3 of the bridge rectifier D2, and the port 3 of the bridge rectifier D2 is also connected to one end of the capacitor C1, the other end of the capacitor C1 is connected to the anode of the diode D3; the cathode of the diode D4 is connected to one end of the resistor R0 at the same time and the collector of the triode Q, the junction point of the diode D3 and the capacitor C1 are connected to the positive pole of the Zener diode D; the capacitor C3 is connected in parallel with the capacitor C2 and the resistor Rr; the bridge rectifier D1, the bridge rectifier D2, the diode D3, the diode D4, Capacitor C1 and Capacitor C2 form a rectifier circuit; the triode Q is NPN type, the base of the triode Q is connected to the negative pole of the Zener diode D, the collector of the triode Q is connected to the input voltage port 1, and the emitter of the triode Q is connected to the positive pole of VOUT port; the Zener diode D is connected in parallel with a capacitor C, and the anode of the Zener diode D is also connected to the VOUT negative port at the same time.

Further: the inductance L1 is a magnetic core inductance.

Further: the resistor Rr is a bleeder resistor.

Further: the capacitor C is a tantalum capacitor.

Compared with the prior art, the beneficial effects of the utility model are:

1. The resistor Rr in the utility model is a discharge resistor. After the power is turned off, the resistor Rr prevents the electricity on the capacitor from being released to cause safety hazards to the person. It can ensure the safety of the user touching the wiring plug after the power is cut off;

2. In the utility model, the capacitor C plays the role of filtering and eliminating the coupling through the power supply, making the voltage more stable, and the current provides a bias current to the Zener diode D through the resistor R0, so that the Zener diode D conducts in reverse and The terminal voltage is constant at the stable voltage value, and the base of the transistor Q is also connected to this stable voltage point at the same time, so the base voltage of Q is "stabilized". Since the base-emitter conduction voltage of the transistor Q is also a constant value, And the emitter voltage is controlled by the base, so the emitter voltage is stable: the stabilized voltage value of the Zener diode D minus the stable value of the conduction voltage of the triode Q base emitter;

3. The utility model has good effects of rectification and voltage stabilization, and there is no potential safety hazard during use.

Description of drawings

Figure 1 is a schematic diagram of the structure of the rectification and voltage stabilization circuit.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1, in the embodiment of the utility model, a kind of rectification and voltage stabilization circuit comprises bridge rectifier D1, bridge rectifier D2, VCC port, resistance Rr and triode Q; Wherein, VCC port includes VCC positive port and VCC negative port Port; the VCC positive port is connected to one end of the inductor L1 and the port 2 of the bridge rectifier D2 through the insurance resistor FS; the inductor L1 is a magnetic core inductor, and the inductance is determined by the magnitude of the AC current, which acts as a power factor compensation function, the other end of the inductor L1 is connected to port 2 of the bridge rectifier D1; port 1 of the bridge rectifier D2 is simultaneously connected to the cathode of the diode D3 and port 1 of the bridge rectifier D1; port 4 of the bridge rectifier D2 is simultaneously It is connected to port 4 of bridge rectifier D1, and port 4 of bridge rectifier D1 is connected to the negative port of VCC at the same time; port 3 of said bridge rectifier D1 is connected to the anode of diode D4 and port 3 of bridge rectifier D2 at the same time, and the bridge The port 3 of the type rectifier D2 is also connected to one end of the capacitor C1, and the other end of the capacitor C1 is connected to the anode of the diode D3; the cathode of the diode D4 is simultaneously connected to one end of the resistor R0 and the collector of the transistor Q, and the connection between the diode D3 and the capacitor C1 The point is connected to the positive pole of the Zener diode D; the capacitor C3 is connected in parallel with the capacitor C2 and the resistor Rr, wherein the resistor Rr is a discharge resistor whose function is mainly to prevent the electricity on the capacitor from being released and causing potential safety hazards to the person after the user cuts off the power , with the bleed resistor, the unbleeded voltage will be consumed by the bleed resistor after power off, thus ensuring the safety of the user touching the wiring plug after power off; the bridge rectifier D1, bridge rectifier D2, diode D3 , diode D4, capacitor C1 and capacitor C2 form a rectifier circuit; the transistor Q is NPN type, the base of the transistor Q is connected to the negative pole of the Zener diode D, the collector of the transistor Q is connected to the input voltage port 1, and the emitter of the transistor Q is connected to The VOUT positive port; the Zener diode D is connected in parallel with a capacitor C, and the capacitor C is a tantalum capacitor, and the positive pole of the Zener diode D is also connected to the VOUT negative port at the same time; during operation, the capacitor C plays a role of filtering and eliminating the coupling through the power supply. The voltage becomes more stable, and the current provides a bias current to the Zener diode D through the resistor R0, so that the Zener diode D conducts in reverse and the terminal voltage is constant at the steady voltage value, and the base of the transistor Q is also connected to this steady voltage. Therefore, the base voltage of Q is "stabilized". Since the base-emitter conduction voltage of the triode Q is also a constant value, and the emitter voltage is controlled by the base, the emitter voltage is stable: Zener diode D stabilizes the voltage The value minus the stable value of the Q base emitter conduction voltage of the transistor.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (4)

1. a regulator rectifier circuit, comprises bridge rectifier D 1, bridge rectifier D 2, VCC port, resistance Rr and triode Q; It is characterized in that, VCC port comprises the positive port of VCC and VCC negative terminal mouth; The positive port of described VCC connects one end of inductance L 1 and the port 2 of bridge rectifier D 2 by insurance resistance FS simultaneously; The other end of described inductance L 1 connects the port 2 of bridge rectifier D1; The port one of described bridge rectifier D 2 connects the negative pole of diode D3 and the port one of bridge rectifier D 1 simultaneously; The port 4 of described bridge rectifier D 2 is connected with the port 4 of bridge rectifier D 1 simultaneously, and the port 4 of bridge rectifier D 1 connects VCC negative terminal mouth simultaneously; The port 3 of described bridge rectifier D 1 connects the positive pole of diode D4 and the port 3 of bridge rectifier D 2 simultaneously, and the port 3 of bridge rectifier D 2 also connects one end of electric capacity C1, and the other end of electric capacity C1 connects the positive pole of diode D3; The negative pole of described diode D4 connects the collector electrode of connecting resistance R0 one end and triode Q simultaneously, and diode D3 is connected the positive pole of voltage stabilizing didoe D with the wiring point of electric capacity C1; Described electric capacity C3 shunt capacitance C2, resistance Rr; Described bridge rectifier D 1, bridge rectifier D 2, diode D3, diode D4, electric capacity C1 and electric capacity C2 form rectification circuit; Described triode Q is NPN type, and triode Q base stage is connected with the negative pole of voltage stabilizing didoe D, and triode Q collector electrode connects input voltage port 1, triode Q emitter and connects the positive port of VOUT; Described voltage stabilizing didoe D shunt capacitance C, voltage stabilizing didoe D positive pole also connects VOUT negative terminal mouth simultaneously.

2. regulator rectifier circuit according to claim 1, is characterized in that, described inductance L 1 is core inductance.

3. regulator rectifier circuit according to claim 1, is characterized in that, described resistance Rr is bleeder resistance.

4. regulator rectifier circuit according to claim 1, is characterized in that, described electric capacity C is tantalum electric capacity.