CN210225230U

CN210225230U - Power supply voltage output setting circuit and external control circuit thereof

Info

Publication number: CN210225230U
Application number: CN201921018325.7U
Authority: CN
Inventors: Liping Wu; 吴丽苹
Original assignee: Dongguan Weitian Electronics Co Ltd
Current assignee: Guangdong Lanwei Electronics Co.,Ltd.
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-03-31
Anticipated expiration: 2029-07-02

Abstract

The utility model relates to an integrated circuit technical field specifically discloses a supply voltage output sets for circuit, including voltage input end, voltage sampling circuit, voltage output end, output voltage sampling end, wherein: the voltage input end is connected with the power supply main control circuit; the voltage sampling circuit comprises a capacitor C₁Resistance R₁Resistance R₂Resistance R₃And a fuse TH 1. The utility model also discloses a power supply voltage output sets for external control circuit of circuit, external control circuit and voltage sampling circuit are connected, and external control circuit includes variable direct current voltage source V₁Resistance R₄Resistance R₅Capacitor C₂And a light emitting diode D₃And a voltage stabilizing tube D₄Diode D₅Diode D₆And field effect transistor Q₁Triode Q₂. A power supply voltage output setting circuit and an external control circuit thereof have the advantages of simple structure, simple and understandable principle and wide application range.

Description

Power supply voltage output setting circuit and external control circuit thereof

Technical Field

The utility model relates to an integrated circuit technical field especially relates to a supply voltage output setting circuit and external control circuit thereof.

Background

In a modern electronic system, a power module is widely applied, but an output voltage of an existing power module is often designed to be a fixed value and cannot be adjusted according to actual use requirements of users, if a module with a specific output voltage is produced according to customer requirements, a manufacturer is bound to face the problems of cargo overstock, cost improvement and the like, and meanwhile, a user needs to continuously replace the module with the specific output voltage to be applied to different use environments, so that workload is increased invisibly.

The existing digital power supply or analog-digital combined chip can achieve the purpose of changing voltage by externally connecting a resistor or modifying program setting, but part of diversified power supplies cannot accept the design cost of the digital power supply, and output pins of the module power supply have compatible requirements and cannot be externally connected with the resistor. It is therefore necessary to design a simple design that can vary the output voltage of the power supply.

SUMMERY OF THE UTILITY MODEL

The technical problem to the inconvenient adjustment of power module output voltage among the prior art, the utility model provides a power voltage output sets for circuit and external control circuit thereof.

The utility model provides a power supply voltage output sets for circuit, includes voltage input end, voltage sampling circuit, voltage output end, output voltage sampling end, wherein: the voltage input end is connected with the power supply main control circuit; the voltage sampling circuit comprises a capacitor C₁Resistance R₁Resistance R₂Resistance R₃And a fuse TH 1; resistance R₁Resistance R₂Resistance R₃Sequentially connected in series, the fuse TH1 is connected in parallel with the resistor R₂Two ends; resistance R₁The other end of the resistor R is connected with the positive pole of the voltage input end₃The other end of the first switch is connected with the negative electrode of the voltage input end; capacitor C₁Is connected between the anode and the cathode of the voltage input end; the voltage of the voltage output end is equal to the voltage of the voltage input end; the voltage of the output voltage sampling end is equal to the resistance R₃The voltage at two ends and the output voltage sampling end are connected into the power supply main control circuit.

Further, the voltage sampling circuit further comprises a diode D₁And a diode D₂Wherein: diode D₁Connected in parallel to a resistor R₁Two ends, and a diode D₁Is connected to the resistor R₁And a resistor R₂To (c) to (d); diode D₂Connected in parallel to a resistor R₃And a diode D₂Is connected to the resistance R₂And a resistor R₃In the meantime.

The utility model discloses a supply voltage output sets for circuit, through fuse TH1 and resistance R₂To realize the fuse TH1 or the resistor R₂Working, and further changing the voltage value of the output voltage sampling end to adapt to different use requirements; the design scheme has the advantages of simple structure and low manufacturing cost, and the resistors with different resistance values are selected for design and installation according to the use requirements, so that the application range is wider.

An external control circuit of a power supply voltage output setting circuit is connected with a voltage sampling circuit and comprises a variable direct current voltage source V₁Resistance R₄Resistance R₅Capacitor C₂And a light emitting diode D₃And a voltage stabilizing tube D₄Diode D₅Diode D₆And field effect transistor Q₁Triode Q₂Wherein: variable DC voltage source V₁Positive electrode and resistor R₄Connected, variable DC voltage source V₁The negative electrode of the voltage input end is connected with the positive electrode of the voltage input end; resistance R₄And the other end of the transistor Q₂Is connected with the collector of the collector; resistance R₅One end and a variable DC voltage source V₁Is connected with the anode of the LED and the other end is connected with the LED D₃The positive electrode of (1) is connected; light emitting diode D₃Negative electrode of (1) and field effect transistor Q₁Is connected with the drain electrode of the transistor; field effect transistor Q₁Gate of and triode Q₂Collector electrode connection of field effect transistor Q₁The source of the voltage source is connected with the negative electrode of the voltage input end; triode Q₂The emitting electrode of the triode Q is connected with the positive electrode of the voltage input end₂Base and field effect transistor Q₁Source of (2) through diode D₅Diode D₆Connecting; diode D₆Anode and field effect transistor Q₁Is connected to the source of diode D₆A negative electrode andpolar tube D₅The positive electrode of (1) is connected; capacitor C₂Is connected to a triode Q₂Between the collector and the emitter; voltage stabilizing tube D₄Is connected to a triode Q₂Between the collector and emitter, and a voltage regulator tube D₄Anode of and triode Q₂Is connected to the emitter.

The utility model discloses an external control circuit of power supply voltage output setting circuit, adjust power supply voltage output setting circuit device connection relation, the power supply voltage output setting circuit after the adjustment can export the voltage different from the original design in order to adapt to other operation requirements; meanwhile, the design structure is simple, the principle is simple and easy to understand, the manufacturing cost is low, and the popularization value is high.

Drawings

For a clearer explanation of the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a circuit diagram of a power supply voltage output setting circuit according to an embodiment of the present invention;

fig. 2 is a circuit diagram of an external control circuit of the power supply voltage output setting circuit according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present application, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, it is a power supply voltage output setting of the embodiment of the present inventionThe circuit comprises a voltage input end, a voltage sampling circuit, a voltage output end and an output voltage sampling end. The voltage input end is connected with the power supply main control circuit, the positive end and the negative end of the voltage input end are connected into the power supply main control circuit, and the power supply main control circuit provides voltage for the power supply voltage output setting circuit. The voltage sampling circuit comprises a capacitor C₁Resistance R₁Resistance R₂Resistance R₃And a fuse TH 1; resistance R₁Resistance R₂Resistance R₃Sequentially connected in series, the fuse TH1 is connected in parallel with the resistor R₂Two ends; resistance R₁The other end of the resistor R is connected with the positive pole of the voltage input end₃The other end of the first switch is connected with the negative electrode of the voltage input end; capacitor C₁Is connected between the positive pole and the negative pole of the voltage input end. The voltage of the voltage output end is equal to the voltage of the voltage input end; the voltage of the output voltage sampling end is equal to the resistance R₃The voltage at two ends and the output voltage sampling end are connected into the power supply main control circuit. Resistance R₁Resistance R₂Resistance R₃The resistance of the resistor is not specifically limited, and is specifically designed according to the value of the required output voltage, and according to the circuit connection manner of the embodiment, when the fuse TH1 is connected in parallel to the resistor R₂Two-terminal resistor R₂Short circuit, resistance R₁A fuse TH1, a resistor R₃The voltage value of the voltage input end is divided, so that the voltage value of the output voltage sampling end depends on the resistor R₁Resistance R₂Resistance R₃The resistance value of (c). The utility model discloses supply voltage output sets for the circuit, makes the voltage of output voltage sample end satisfy power control circuit's design, and then realizes supply voltage's settlement output.

Specifically, as shown in fig. 1, on the basis of the previous embodiment, the voltage sampling circuit of this embodiment further includes a diode D₁And a diode D₂Wherein: diode D₁Connected in parallel to a resistor R₁Two ends, and a diode D₁Is connected to the resistor R₁And a resistor R₂To (c) to (d); diode D₂Connected in parallel to a resistor R₃And a diode D₂Is connected to electricity at the negative poleResistance R₂And a resistor R₃In the meantime. Diode D₁And diode D₂When no voltage is input to the voltage input end of the voltage sampling circuit, the external voltage difference value of the voltage sampling circuit to the voltage output end is larger than that of the diode D₁And a diode D₂Negative voltage of the sum of the voltage drops when a current flows through the diode D₂A fuse TH1, a diode D₁The fuse TH1 is blown, which in turn adjusts the power output setting circuit structure while protecting other devices in the power output setting circuit.

The working process of the power supply voltage output setting circuit in the embodiment is as follows:

as shown in FIG. 1, when the output setting circuit works normally, i.e. there is a normal voltage input at the voltage input terminal, since the resistance of the fuse TH1 is much smaller than that of the resistor R₂So that the resistance R is₂Short circuit, resistance R₁Resistance R₃With current passing through, diode D₁And a diode D₂Cut off and do not participate in the work; therefore, the resistance R₁Resistance R₃The voltage of the voltage input end is divided, the voltage of the voltage output end is equal to that of the voltage input end, and the voltage of the output voltage sampling end is equal to that of the resistor R₃The voltage magnitude at the two ends; thus, the power supply can provide the voltage value of the power supply voltage and the resistor R₃Two voltage values are provided at two ends.

If the output voltage sampling end voltage of the original output setting circuit needs to be changed, when the output setting circuit is in a non-working state, namely no voltage is input at the voltage input end, the value of the output voltage is 0, a negative voltage is externally connected to the voltage output end, and the difference value of the negative voltage is larger than that of the diode D₁And a diode D₂The current generated by the external negative voltage flows through the diode D₂A fuse TH1, a diode D₁After the fuse TH1 is fused, the structure of the output setting circuit is changed, and the external negative voltage is removed.

When the voltage input end is connected with the positive voltage again, the resistor R₁Resistance R₂Resistance R₃Are all in working state, and the resistance R₁Resistance R₂Resistance R₃Voltage division is carried out, the voltage of the voltage output end is equal to that of the voltage input end, and the voltage of the output voltage sampling end is equal to that of the resistor R₃The voltage between the voltage output end and the output voltage sampling end is equal to the resistor R₁And a resistor R₂The sum of the voltages across them.

The existing power supply voltage output setting circuit can be packaged into a whole product and then leaves the factory, if the transaction between a manufacturer and a client is terminated due to some reasons, the manufactured product is not easy to find the client with the same requirement for selling due to specific output voltage, on one hand, the cost for carrying out secondary selling by modifying the internal circuit of the packaged product is very high, a large amount of manpower and material resources are needed, and on the other hand, the product overstock can generate great influence on the economic benefit of the manufacturer. So just need accord with the requirement of other customers to voltage output value in order to sell as early as possible, for realizing this purpose, can set for the circuit reference with mains voltage output the embodiment of the utility model discloses design, the shaping product can leave corresponding binding post for satisfying the operation requirement, fuses through the external negative voltage of the voltage output end at mains voltage output set for the circuit in with every shaping product, and then the structure of adjustment voltage output set for the circuit, revises the voltage output value of product into the output voltage that accords with other customer requirements. The power voltage output of this embodiment sets for the circuit, need not carry out operations such as deblocking, circuit reset to encapsulation shaping product, just can realize the modification to circuit inner structure through fusing the fuse to low price, and to the producer, the cost of fuse is far less than the cost of shaping product, and the operation degree of difficulty and required time, the human cost of fusing the fuse also are far less than the cost of refabricating a new product, so the design of this embodiment has very big practicality to enterprise's production and operation.

The utility model discloses supply voltage output sets for circuit, through fuse TH1 and resistance R₂In parallel connection with the structure of (1), realize the guaranteeFuse TH1 or resistor R₂Working is carried out, and the voltage value of the output voltage sampling end is changed so as to adapt to different use requirements; the design scheme has the advantages of simple structure and low manufacturing cost, and the resistors with different resistance values are selected for design and installation according to the use requirements, so that the application range is wider.

As shown in FIG. 2, the utility model discloses an external control circuit of supply voltage output settlement circuit, external control circuit and the voltage sampling circuit connection in the above embodiment for the realization sets for the adjustment of circuit structure to supply voltage output, in order to satisfy other voltage value output of power, external control circuit includes variable DC voltage source V₁Resistance R₄Resistance R₅Capacitor C₂And a light emitting diode D₃And a voltage stabilizing tube D₄Diode D₅Diode D₆And field effect transistor Q₁Triode Q₂Wherein: variable DC voltage source V₁Positive electrode and resistor R₄Connected, variable DC voltage source V₁The negative electrode of the voltage input end is connected with the positive electrode of the voltage input end; resistance R₄And the other end of the transistor Q₂Is connected with the collector of the collector; resistance R₅One end and a variable DC voltage source V₁Is connected with the anode of the LED and the other end is connected with the LED D₃The positive electrode of (1) is connected; light emitting diode D₃Negative electrode of (1) and field effect transistor Q₁Is connected with the drain electrode of the transistor; field effect transistor Q₁Gate of and triode Q₂Collector electrode connection of field effect transistor Q₁The source of the voltage source is connected with the negative electrode of the voltage input end; triode Q₂The emitting electrode of the triode Q is connected with the positive electrode of the voltage input end₂Base and field effect transistor Q₁Source of (2) through diode D₅Diode D₆Connecting; diode D₆Anode and field effect transistor Q₁Is connected to the source of diode D₆Cathode and diode D₅The positive electrode of (1) is connected; capacitor C₂Is connected to a triode Q₂Between the collector and the emitter; voltage stabilizing tube D₄Is connected to a triode Q₂Between the collector and emitter, and a voltage regulator tube D₄Anode and triode ofTube Q₂Is connected to the emitter. Field effect transistor Q in the present embodiment₁Can also be realized by replacing a triode Q₂A field effect transistor may be used instead, so the scope of the present embodiment is not limited to the circuit design disclosed in fig. 2; meanwhile, on the basis of the design disclosed in the attached fig. 2, only the series-parallel connection of the circuits is added or modified, but a design mode consistent with the principle of the scheme is adopted, and the method also belongs to the protection scope of the embodiment.

The utility model discloses in a power voltage output sets for circuit's external control circuit, when will resetting voltage, as shown in FIG. 2, external control circuit is connected with the voltage sampling circuit in the above embodiment, and whole working process is as follows:

when variable DC voltage source V₁When the voltage of (2) is gradually increased, it passes through the resistor R₄Capacitor C₁Charging, voltage regulator tube D₄Is used to limit the capacitance C₁Is too high to the field effect transistor Q₁Cause damage when the capacitor C₁Is raised to the field effect transistor Q₁At turn-on voltage of (2), the field effect transistor Q₁Conducting, variable DC voltage source V₁Through a resistance R₅And a light emitting diode D₃And field effect transistor Q₁Power supply to the output setting circuit, light emitting diode D₃At this time, light is emitted, and the resistance R₅Is aimed at limiting the current on this branch to be excessive. When diode D₁Diode D₂The total voltage of the fuse TH1 is lower than that of the diode D₅Diode D₆Triode Q₂When the base electrode of the transistor is in a loop, the triode Q₂And is not conductive. When variable DC voltage source V₁The current flowing through the fuse TH1 also rises with the rise of the voltage of (2), and finally the fuse TH1 is blown; resistance R₂Into the circuit, resulting in a diode D₁Diode D₂Resistance R₂Upper total voltage is higher than the diode D₅Diode D₆Triode Q₂When the base electrode of the transistor is in a loop, the triode Q₂Conducting and pulling down field effect transistor Q₁Grid voltage of, field effect transistor Q₁Switch off(ii) a Field effect transistor Q₁After being turned off, the triode Q₂Without a supply circuit and thus disconnected, the light-emitting diode D₃Extinguished, variable DC voltage source V₁And through the resistor R₄Capacitor C₂Charging and re-conducting field effect transistor Q₁When the circuit works in the current limiting state, the triode Q₂Turn-on of the field effect transistor Q is limited₁Depth of conduction of, the light emitting diode D₃Has a very low light-emitting brightness, the light-emitting diode D₃The bright to slightly bright process represents the entire product reset voltage success. The embodiment fuses the fuse TH1 through the external control circuit, which is a way to realize the external negative voltage at the voltage output terminal in the first embodiment, and simultaneously utilizes the light emitting diode D₃The process from brightness to slight brightness shows that the voltage resetting is successful, and the voltage resetting process can be more intuitively known.

In the external control circuit of the power supply voltage output setting circuit of the embodiment, the connection relation of the power supply voltage output setting circuit device is adjusted, and the adjusted power supply voltage output setting circuit can output voltage different from the original design so as to adapt to other use requirements; the design structure is simple, the cost is low, and the popularization value is high.

The present invention has been further described with reference to specific embodiments, but it should be understood that the specific description herein should not be construed as limiting the spirit and scope of the present invention, and that various modifications to the above-described embodiments, which would occur to persons skilled in the art after reading this specification, are within the scope of the present invention.

Claims

1. The utility model provides a power supply voltage output sets up circuit which characterized in that, includes voltage input end, voltage sampling circuit, voltage output end, output voltage sampling end, wherein:

the voltage input end is connected with the power supply main control circuit;

the voltage sampling circuit comprises a capacitor C₁Resistance R₁Resistance R₂Resistance R₃And insuranceSilk TH 1; the resistor R₁Resistance R₂Resistance R₃Sequentially connected in series, the fuse TH1 is connected in parallel with the resistor R₂Two ends; the resistor R₁The other end of the resistor R is connected with the anode of the voltage input end, and the resistor R₃The other end of the first switch is connected with the negative electrode of the voltage input end; the capacitor C₁The voltage input end is connected between the positive pole and the negative pole of the voltage input end;

the voltage of the voltage output end is equal to the voltage of the voltage input end;

the voltage of the output voltage sampling end is equal to the resistor R₃And the voltage at two ends, and the output voltage sampling end is connected into the power supply main control circuit.

2. The power supply voltage output setting circuit according to claim 1, wherein the voltage sampling circuit further comprises a diode D₁And a diode D₂Wherein:

the diode D₁Is connected in parallel with the resistor R₁Two ends, and the diode D₁Is connected to the resistor R₁And the resistance R₂To (c) to (d); the diode D₂Is connected in parallel with the resistor R₃And the diode D₂Is connected to the resistor R₂And the resistance R₃In the meantime.

3. An external control circuit of a power supply voltage output setting circuit, characterized in that the external control circuit is connected with the voltage sampling circuit of any one of claims 1 to 2, and the external control circuit comprises a variable DC voltage source V₁Resistance R₄Resistance R₅Capacitor C₂And a light emitting diode D₃And a voltage stabilizing tube D₄Diode D₅Diode D₆And field effect transistor Q₁Triode Q₂Wherein:

said variable DC voltage source V₁And the resistor R₄Connected to said variable DC voltage source V₁Is negativeThe pole is connected with the positive pole of the voltage input end; the resistor R₄And the other end of the transistor Q₂Is connected with the collector of the collector; the resistor R₅One end of the variable DC voltage source is connected with the variable DC voltage source V₁Is connected with the anode of the light emitting diode D, and the other end of the light emitting diode D is connected with the cathode of the light emitting diode₃The positive electrode of (1) is connected; the light emitting diode D₃And the field effect transistor Q₁Is connected with the drain electrode of the transistor; the field effect transistor Q₁And the triode Q₂The collector electrode of said field effect transistor Q₁Is connected with the negative pole of the voltage input end; the triode Q₂Is connected with the positive pole of the voltage input end, and the triode Q₂Base electrode of and the field effect transistor Q₁Through the diode D₅Diode D₆Connecting; the diode D₆And the field effect transistor Q₁The source of the diode D is connected₆And the diode D₅The positive electrode of (1) is connected; the capacitor C₂Is connected to the triode Q₂Between the collector and the emitter; the voltage stabilizing tube D₄Is connected to the triode Q₂Between the collector and the emitter, and the voltage regulator tube D₄And the positive electrode of the triode Q₂Is connected to the emitter.