CN210804143U - Voltage regulating circuit - Google Patents
Voltage regulating circuit Download PDFInfo
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- CN210804143U CN210804143U CN201921970924.9U CN201921970924U CN210804143U CN 210804143 U CN210804143 U CN 210804143U CN 201921970924 U CN201921970924 U CN 201921970924U CN 210804143 U CN210804143 U CN 210804143U
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Abstract
A voltage regulation circuit comprises a voltage division reference circuit, an amplifier, a transistor, a low-voltage output resistor and a voltage regulation unit circuit. The utility model discloses utilize partial pressure reference circuit to obtain a plurality of reference voltage, then carry out the enlargies of first order to each reference voltage respectively through the amplifier, enlarge reference voltage to suitable voltage range after, the voltage regulation elementary circuit who connects through each amplifier rear end carries out the second grade of voltage to each voltage output end respectively and enlargies and amplitude control. Therefore, the utility model discloses can utilize the first order to enlarge and guarantee that output voltage is stable, utilize the second level to enlarge and guarantee that output voltage has enough gain to can finely tune each way output voltage respectively through the potentiometre in the second level is enlarged, realize more accurate controllable steady voltage output.
Description
Technical Field
The utility model relates to a power supply circuit field especially relates to a voltage regulating circuit.
Background
The operation circuit, the switching circuit, the detection circuit and the like in each unit circuit in the electrical cabinet respectively correspond to respective power supply requirements. The power supply circuit provided in the existing electrical cabinet generally needs to individually design a matched power supply circuit for each power supply requirement. The power structure in the existing electrical cabinet is complex, various power circuits are easy to influence each other, and the error of output voltage is large.
Each path of power supply output in the existing electrical cabinet has no corresponding state mark, so that the working conditions of each path of power supply circuit need to be checked one by one during maintenance, and the maintenance and the inspection of electrical equipment are not facilitated.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects existing in the prior art, the utility model aims to provide a voltage regulating circuit. The present application can regulate voltage output over a larger voltage variation range by means of stepped amplification.
In order to achieve the above object, the present invention provides a voltage regulating circuit, which includes: the voltage division reference circuit is connected with the input voltage of the electrical cabinet and comprises a low-voltage output end and N reference voltage output ends, wherein N is more than or equal to 1; the amplifiers comprise N amplifiers, wherein N is more than or equal to 1, the first input end of each amplifier is respectively connected with a first level, and the second input end of each amplifier is respectively connected with the output end of each reference voltage; the transistors comprise N, N is more than or equal to 1, the control end of each transistor is respectively connected with the output end of each amplifier, and the transistors are sequentially connected in series from high to low according to the voltage of the output end of the amplifier connected with the transistors; one end of the low-voltage output resistor is connected with the low-voltage output end; the voltage regulating unit circuits comprise N voltage regulating unit circuits, wherein N is larger than or equal to 1, each voltage regulating unit circuit respectively comprises a low-voltage input end and a high-voltage input end, the low-voltage input end of each voltage regulating unit circuit is connected to the other end of the low-voltage output resistor, the high-voltage input end of each voltage regulating unit circuit is respectively connected to the driving output end of each transistor, load resistors are respectively connected in series between the output ends of each voltage regulating unit circuit, and each load resistor is also respectively connected with each voltage output end of each voltage regulating circuit.
Optionally, in the voltage regulator circuit, the transistors are P-channel MOS transistors, a source of the P-channel MOS transistor connected to the amplifier with the highest output voltage is connected to a second level, where the second level does not exceed the highest voltage output by each amplifier, and a drain of each P-channel MOS transistor is a driving output terminal of the P-channel MOS transistor.
Optionally, in any one of the voltage regulation circuits described above, each of the voltage regulation unit circuits is respectively and independently provided with: the base electrode or the gate electrode of the first amplifying tube is connected with the low-voltage input end of the voltage regulating unit circuit, the emitter electrode of the first amplifying tube is grounded, and the collector electrode of the first amplifying tube is connected with a first resistor in series, and the first resistor is connected to the high-voltage input end of the voltage regulating unit circuit; the base electrode or the gate electrode of the second amplifying tube is connected with the collector electrode of the first amplifying tube, and the emitter electrode of the second amplifying tube is grounded; and one end of the potentiometer is connected with the collector of the second amplifying tube, and the other end of the potentiometer is connected with the output end of the voltage regulating unit circuit.
Optionally, in the voltage regulating circuit, the first amplifying transistor or the second amplifying transistor is an NPN transistor.
Optionally, in the voltage regulator circuit of any one of the above, the first amplifier tube or the second amplifier tube is an IGBT transistor.
Optionally, in the voltage regulator circuit, a light emitting element is further connected between the collector of the first amplifying transistor and the base of the second amplifying transistor.
Optionally, in the voltage regulation circuit of any one of the above, a light emitting element is further connected between the collector of the first amplifier tube and the gate of the second amplifier tube
Optionally, in the voltage regulation circuit, the light emitting element is a light emitting diode, an anode of the light emitting diode is connected to a collector of the first amplifying tube, and a cathode of the light emitting diode is connected to a base or a gate of the second amplifying tube.
Optionally, in the voltage regulation circuit, the type of the potentiometer is WX 3.
Optionally, the voltage regulating circuit of any one of the above, wherein the amplifier is of type LM 387.
Compared with the prior art, the utility model has the following technical effects:
1. the utility model provides a voltage regulation circuit, it utilizes partial pressure reference circuit to obtain a plurality of reference voltage, then carries out the enlargies of first order to each reference voltage respectively through the amplifier, enlargies reference voltage to suitable voltage range back, and the voltage regulation unit circuit of connecting through each amplifier rear end carries out the second grade of voltage to each voltage output end respectively and enlargies and amplitude regulation. Therefore, the invention can ensure the output voltage to be stable by using the first-stage amplification, ensure the output voltage to have enough gain by using the second-stage amplification, and respectively carry out fine adjustment on each path of output voltage by using the potentiometer in the second-stage amplification, thereby realizing more accurate and controllable stable voltage output.
2. Further, the utility model discloses still can further with each voltage regulation unit circuit design has the two-stage and enlargies, and the two-stage is enlargied and is realized through NPN triode or IGBT transistor respectively, can also set up light emitting component between these two amplifier tubes and carry out the suggestion of voltage output state. When the light-emitting element is selected as the light-emitting diode, once the voltage output fails, the light-emitting diode is turned off in the reverse direction, so that an internal circuit of the voltage regulating unit can be protected, and the power circuit is prevented from being damaged by voltage or current impact at the top end of the load.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, together with the embodiments of the invention for the purpose of explanation and not limitation of the invention. In the drawings:
fig. 1 is a schematic diagram of a voltage regulation circuit according to the present invention;
fig. 2 is a schematic diagram of the voltage division reference circuit of fig. 1.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
The meaning of "and/or" in the present invention means that they exist individually or both at the same time.
The term "connected" as used herein may mean either a direct connection between elements or an indirect connection between elements through other elements.
The utility model provides a voltage regulation circuit, it is shown with reference to figure 1, it includes:
the voltage division reference circuit is connected with the input voltage of the electrical cabinet and comprises a low-voltage output end VL and N reference voltage output ends, wherein N is more than or equal to 1;
the amplifier comprises N LM387 amplifiers, N is more than or equal to 1, a first input end of each amplifier is respectively connected with a first level Vrf, and a second input end of each amplifier is respectively connected with a reference voltage output end;
the transistors comprise N, N is more than or equal to 1, the control end of each transistor is respectively connected with the output end of each amplifier, and the transistors are sequentially connected in series from high to low according to the voltage of the output end of the amplifier connected with the transistors;
a low-voltage output resistor R3, one end of which is connected with the low-voltage output end VL;
the voltage regulating unit circuits comprise N voltage regulating unit circuits, wherein N is larger than or equal to 1, each voltage regulating unit circuit respectively comprises a low-voltage input end and a high-voltage input end, the low-voltage input end of each voltage regulating unit circuit is connected to the other end of the low-voltage output resistor R3, the high-voltage input end of each voltage regulating unit circuit is respectively connected to the driving output end of each transistor, a load resistor RL is respectively connected between the output ends of each voltage regulating unit circuit in series, and each load resistor RL is also respectively connected with each voltage output end of each voltage regulating circuit.
In one implementation, the voltage division reference circuit can be directly implemented by the voltage division circuit shown in fig. 2. The voltage division circuit is connected between a power supply voltage V1 and the ground level in series, and a common end between resistors of a plurality of resistors with corresponding resistance values is used as a reference voltage output end to output reference voltages with different voltage amplitudes to corresponding amplifiers. The amplifier amplifies the reference voltage and provides the amplified reference voltage to the voltage regulating unit circuit for further amplification and fine adjustment.
In the above circuit structure, the transistor may be a P-channel MOS transistor. As shown in fig. 1, the source of the P-channel MOS transistor connected to the amplifier corresponding to the highest output voltage is connected to the second level EP1, the drain of the P-channel MOS transistor connected to the amplifier corresponding to the highest output voltage is connected to the source of the next P-channel MOS transistor, and the gate of the next P-channel MOS transistor is connected to the output of the amplifier corresponding to the higher output voltage. In this way, the P-channel MOS transistors are connected in series in order of magnitude of the voltage received by their gates. The second level EP1 does not exceed the highest voltage output by each amplifier, and the drain of each P-channel MOS transistor is the driving output terminal thereof.
And the drain electrode of each P-channel MOS transistor is used as a driving output end thereof and is respectively connected with a group of independent voltage regulating unit circuits. Each group of voltage regulation units is electrically and independently provided with:
a first amplifying tube Q1, the base or gate of which is connected to the low voltage input terminal of the voltage regulating unit circuit, the emitter of which is grounded, the collector of which is connected in series with a first resistor R1, and the first resistor R1 is connected to the high voltage input terminal of the voltage regulating unit circuit;
a second amplifying tube Q2, the base electrode or gate electrode of which is connected with the collector electrode of the first amplifying tube Q1, and the emitter electrode of which is grounded;
and a potentiometer R2 having one end connected to the collector of the second amplifying transistor Q2 and the other end connected to the output end of the voltage adjusting unit circuit.
The circuit firstly utilizes a voltage division reference circuit to obtain a plurality of reference voltages, then amplifiers are used for respectively carrying out primary amplification on each reference voltage, after the reference voltages are amplified to a proper voltage range, a voltage regulation unit circuit connected with the rear end of each amplifier is used, and particularly, a potentiometer is used for respectively carrying out secondary amplification and amplitude regulation on each voltage output end.
Therefore, the invention can ensure the output voltage to be stable by using the first-stage amplification, ensure the output voltage to have enough gain by using the second-stage amplification, and respectively carry out fine adjustment on each path of output voltage by using the potentiometer in the second-stage amplification, thereby realizing more accurate and controllable stable voltage output.
In a more specific implementation manner, the first amplifying transistor Q1 or the second amplifying transistor Q2 in the circuit structure may be selected as an NPN triode or an IGBT transistor.
In order to display the output status of each power source, a light emitting device may be connected between the first amplifier tube Q1 and the second amplifier tube Q2. The light emitting element is a light emitting diode D1 connected between the collector of the first amplifier tube Q1 and the base of the second amplifier tube Q2, or between the collector of the first amplifier tube Q1 and the gate of the second amplifier tube Q2. In order to protect the internal circuit of the voltage output terminal of the circuit from the transient high voltage or large current impact of the external load, the led D1 may be configured such that the anode thereof is connected to the collector of the first amplifier transistor Q1, and the cathode thereof is connected to the base or gate of the second amplifier transistor Q2. Therefore, once the voltage output fails, the light emitting diode is turned off reversely to protect the internal circuit of the voltage regulating unit, and the voltage or current impact at the top end of the load is prevented from damaging the power circuit.
In order to ensure that the current of the external load of the circuit meets the parameter requirement, the model of the potentiometer R2 can be selected to be WX3, the potentiometer R2 has 3W power output, and the power requirement of most loads can be met.
Those of ordinary skill in the art will understand that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A voltage regulation circuit, comprising:
the voltage division reference circuit is connected with the input voltage of the electrical cabinet and comprises a low-voltage output end (VL) and N reference voltage output ends, wherein N is more than or equal to 1;
the amplifier comprises N amplifiers, wherein N is more than or equal to 1, a first input end of each amplifier is respectively connected with a first level (Vrf), and a second input end of each amplifier is respectively connected with a reference voltage output end;
the transistors comprise N, N is more than or equal to 1, the control end of each transistor is respectively connected with the output end of each amplifier, and the transistors are sequentially connected in series from high to low according to the voltage of the output end of the amplifier connected with the transistors;
a low voltage output resistor (R3) having one end connected to the low voltage output terminal (VL);
the voltage regulating unit circuits comprise N voltage regulating unit circuits, wherein N is larger than or equal to 1, each voltage regulating unit circuit respectively comprises a low-voltage input end and a high-voltage input end, the low-voltage input end of each voltage regulating unit circuit is connected to the other end of the low-voltage output resistor (R3), the high-voltage input end of each voltage regulating unit circuit is respectively connected to the driving output end of each transistor, a load Resistor (RL) is respectively connected between the output ends of each voltage regulating unit circuit in series, and each load Resistor (RL) is also respectively connected with each voltage output end of each voltage regulating circuit.
2. The voltage regulating circuit according to claim 1, wherein said transistors are P-channel MOS transistors, and the source of the P-channel MOS transistor to which the amplifier having the highest output voltage is connected to a second level (EP1), wherein said second level (EP1) does not exceed the highest voltage output by each of said amplifiers, and the drain of each of said P-channel MOS transistors is its driving output.
3. The voltage regulating circuit according to claim 1, wherein each of said voltage regulating unit circuits is independently provided with:
a first amplifying tube (Q1), the base or gate of which is connected with the low-voltage input end of the voltage regulating unit circuit, the emitter of which is grounded, the collector of which is connected with a first resistor (R1) in series, and the first resistor (R1) is connected with the high-voltage input end of the voltage regulating unit circuit;
a second amplifying tube (Q2), wherein the base electrode or the gate electrode of the second amplifying tube is connected with the collector electrode of the first amplifying tube (Q1), and the emitter electrode of the second amplifying tube is grounded;
and a potentiometer (R2) having one end connected to the collector of the second amplifier tube (Q2) and the other end connected to the output end of the voltage regulating unit circuit.
4. The voltage regulating circuit of claim 3, wherein the first amplifier transistor (Q1) or the second amplifier transistor (Q2) is an NPN transistor.
5. The voltage regulation circuit of claim 3, wherein the first amplifier tube (Q1) or the second amplifier tube (Q2) is an IGBT transistor.
6. The voltage regulation circuit of claim 4 wherein a light emitting element is further connected between the collector of the first amplification tube (Q1) and the base of the second amplification tube (Q2).
7. The voltage regulation circuit of claim 5 wherein a light emitting element is further connected between the collector of the first amplifier transistor (Q1) and the gate of the second amplifier transistor (Q2).
8. The voltage regulator circuit according to claim 6 or 7, wherein the light emitting device is a light emitting diode (D1), the anode of the light emitting diode (D1) is connected to the collector of the first amplifying transistor (Q1), and the cathode of the light emitting diode (D1) is connected to the base or gate of the second amplifying transistor (Q2).
9. The voltage regulation circuit of claim 3 wherein the potentiometer (R2) is of type WX 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921970924.9U CN210804143U (en) | 2019-11-15 | 2019-11-15 | Voltage regulating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921970924.9U CN210804143U (en) | 2019-11-15 | 2019-11-15 | Voltage regulating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210804143U true CN210804143U (en) | 2020-06-19 |
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ID=71230481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921970924.9U Expired - Fee Related CN210804143U (en) | 2019-11-15 | 2019-11-15 | Voltage regulating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210804143U (en) |
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2019
- 2019-11-15 CN CN201921970924.9U patent/CN210804143U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200619 Termination date: 20211115 |
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| CF01 | Termination of patent right due to non-payment of annual fee |