CN219420578U - Low-power-consumption linear power supply circuit - Google Patents

Low-power-consumption linear power supply circuit Download PDF

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Publication number
CN219420578U
CN219420578U CN202320185488.4U CN202320185488U CN219420578U CN 219420578 U CN219420578 U CN 219420578U CN 202320185488 U CN202320185488 U CN 202320185488U CN 219420578 U CN219420578 U CN 219420578U
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circuit
resistor
voltage
power supply
voltage stabilizing
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陈江宾
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Xiamen Leelen High Voltage Electric Co ltd
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Xiamen Leelen High Voltage Electric Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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Abstract

The utility model relates to the technical field of power supply circuits, and discloses a low-power consumption linear power supply circuit, which comprises: the voltage-stabilizing circuit comprises a voltage-reducing circuit, a protection circuit, a voltage-stabilizing circuit, a filter circuit and a load circuit, wherein the input end of the voltage-reducing circuit is connected with an external power supply, the output end of the voltage-reducing circuit is connected with the input end of the protection circuit, the output end of the protection circuit is connected with the input end of the voltage-stabilizing circuit, the output end of the voltage-stabilizing circuit is connected with the input end of the filter circuit, the output end of the filter circuit is connected with the input end of the load circuit, and the output end of the load circuit is externally connected with a load. Through rationalizing the design to power supply circuit, can realize that resistance volume reduces, reduce calorific capacity, reduce the consumption of complete machine, reduce the electric current of complete machine and stabilize output power etc. and this power supply circuit can realize the integration that the volume reduces, and need not auxiliary heat dissipation etc. of fin.

Description

Low-power-consumption linear power supply circuit
Technical Field
The utility model relates to the technical field of power supply circuits, in particular to a low-power-consumption linear power supply circuit.
Background
The power supply circuit refers to the circuit design of a power supply part for supplying power to electric equipment, and the used circuit form and characteristics. There is both an ac power source and a dc power source. The power supply circuit can be divided into a linear voltage stabilizing circuit and a switching voltage stabilizing circuit. Most electronic devices adopt a linear voltage stabilizing circuit, the electronic components in the circuit are adjusted to realize that the electronic devices work in a linear region, and the voltage drop is carried out to stabilize output by adjusting the matching relation between the electronic components. However, the existing linear voltage-stabilizing power supply circuit almost adopts a resistor with a larger volume, such as a cement resistor and the like; the voltage stabilizing circuit often generates excessive heat, influences the use effect of the power circuit and the like, or needs to be provided with cooling fins around the voltage stabilizing circuit to dissipate heat so as to reduce the heat; the existing power supply circuit is large in size and high in power consumption, and unstable states can sometimes occur, so that the use, durability and the like of the power supply are affected.
Accordingly, in view of the above problems, the existing power supply circuit is required to be further improved.
Disclosure of Invention
The utility model aims to overcome the defects of larger volume resistance (such as cement resistance and the like) and overlarge heating value of the existing power circuit, and the power circuit is larger in volume and higher in power consumption, and unstable state can occur, so that the use, durability and the like of the power supply are influenced. Aiming at the problems, through rationalizing the power supply circuit and adopting a voltage reduction circuit, a protection circuit, a voltage stabilizing circuit, a filter circuit and a load circuit, the resistor volume reduction, the heat productivity reduction, the power consumption reduction of the whole machine, the current reduction of the whole machine, the stable output power supply and the like can be realized; the volume of the power supply circuit can be reduced by adopting the metal film resistor of the voltage reduction circuit; the secondary linear voltage stabilizing circuit is adopted for stabilizing voltage output, so that the output voltage can be improved (for example, the output voltage is improved from 48V to 110V) during primary linear voltage stabilizing output; by adopting two voltage stabilizing tubes connected in series, the output voltage can be improved, and the output current can be reduced; the output voltage is increased, so that the voltage drop of the NPN tube Q1 is reduced, the current is reduced, the energy consumption is reduced, the heat generation is less, and a radiating fin and the like are not needed; when the high voltage takes 220VAC input, half-wave rectification and bridge rectification are adopted, so that power consumption and the like can be further reduced.
The technical scheme of the utility model is as follows:
a low power consumption linear power supply circuit, the linear power supply circuit comprising: the voltage stabilizing circuit comprises a voltage reducing circuit, a protection circuit, a voltage stabilizing circuit, a filter circuit and a load circuit, wherein the power input end of the voltage reducing circuit is connected with an external power supply, the power output end of the voltage reducing circuit is connected with the power input end of the protection circuit, the power output end of the protection circuit is connected with the power input end of the voltage stabilizing circuit, the power output end of the voltage stabilizing circuit is connected with the power input end of the filter circuit, the power output end of the filter circuit is connected with the power input end of the load circuit, the power output end of the load circuit is externally connected with a load, and the voltage stabilizing circuit is used for stabilizing the voltage output by the voltage reducing circuit and reducing the voltage stabilizing power consumption.
Further, the voltage reducing circuit selects resistor voltage division type voltage reduction.
Further, the power input end of the step-down circuit comprises a high-voltage power end, a low-voltage power end and a zero-voltage power end.
Further, the step-down circuit comprises a resistor R1, a resistor R2, a resistor R3 and a diode D1, wherein one end of the resistor R1 is connected with the high voltage of an external power supply, the other end of the resistor R1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with the positive electrode of the diode D1, the negative electrode of the diode D1 is connected with the low voltage of the external power supply and one end of the power supply input end of the protection circuit in parallel, one end of the resistor R3 is connected with the zero voltage of the external power supply, and the other end of the resistor R3 is connected with the other end of the power supply input end of the protection circuit.
Further, the protection circuit selects a common mode protection circuit.
Further, the protection circuit includes a common mode inductance T1, a capacitor C1, a piezoresistor RV1, a bridge rectifier DB1 and a capacitor C2, where a power input end of the common mode inductance T1 is connected with an external power source, a first end of a power output end of the common mode inductance T1 is connected with one end of the capacitor C1, one end of the piezoresistor RV1 and a first input end of the bridge rectifier DB1 in parallel, a second end of the power output end of the common mode inductance T1 is connected with the other end of the capacitor C1, one end of the piezoresistor RV1 and a second input end of the bridge rectifier DB1 in parallel, a first output end of the bridge rectifier DB1 is connected with a positive electrode of the capacitor C2 and a power input end of the voltage stabilizing circuit in parallel, and a second output end of the bridge rectifier DB1 and a negative electrode of the capacitor C2 are commonly grounded.
Further, the voltage stabilizing circuit selects a two-stage linear voltage stabilizing circuit.
Further, the second-stage linear voltage stabilizing circuit comprises a first-stage linear voltage stabilizing circuit and a second-stage linear voltage stabilizing circuit, wherein the power input end of the first-stage linear voltage stabilizing circuit is connected with the power output end of the protection circuit, the power output end of the first-stage linear voltage stabilizing circuit is connected with the power input end of the second-stage linear voltage stabilizing circuit, and the power output end of the second-stage voltage stabilizing circuit is connected with the power input end of the filter circuit.
Further, the voltage stabilizing circuit comprises a resistor R4, a resistor R5, a diode D4, a diode D5, an NPN tube Q1, a capacitor C16, a resistor R6, an NPN tube Q2, a voltage stabilizing tube ZD1, a voltage stabilizing tube ZD2, a voltage stabilizing tube ZD3 and a diode TVS1, one end of the resistor R4 is connected in parallel with a power output end of the protection circuit, a collector of the NPN tube Q1 and a cathode of the diode D4, the other end of the resistor R4 is connected with one end of the resistor R5, the other end of the resistor R5 is connected in parallel with a cathode of the voltage stabilizing tube ZD1 and a base of the NPN tube Q1, an anode of the voltage stabilizing tube ZD1 is connected with a cathode of the voltage stabilizing tube ZD2, an anode of the voltage stabilizing tube ZD2 is grounded, an emitter of the NPN tube Q1 is connected in parallel with an anode of the diode D4, one end of the capacitor C16, a cathode of the diode D5, one end of the resistor R6 and a cathode of the NPN tube Q2, the other end of the resistor R6 is connected in parallel with a cathode of the diode Q3 and a cathode of the NPN tube Q2, and a cathode of the voltage stabilizing tube Q2 is connected in parallel with an anode of the voltage stabilizing tube, and a cathode of the diode is connected with a cathode of the voltage stabilizing tube 2 is grounded.
The first-stage linear voltage stabilizing circuit comprises a resistor R4, a resistor R5, a diode D4, an NPN tube Q1, a capacitor C16, a voltage stabilizing tube ZD1 and a voltage stabilizing tube ZD2, wherein one end of the resistor R4 is connected with a power output end of the protection circuit, a collector of the NPN tube Q1 and a negative electrode of the diode D4 in parallel, the other end of the resistor R4 is connected with one end of the resistor R5, the other end of the resistor R5 is connected with the negative electrode of the voltage stabilizing tube ZD1 and a base of the NPN tube Q1 in parallel, an anode of the voltage stabilizing tube ZD1 is connected with a cathode of the voltage stabilizing tube ZD2, an anode of the voltage stabilizing tube ZD2 is grounded, and an emitter of the NPN tube Q1 is connected with an anode of the diode D4, one end of the capacitor C16 and a power input end of the second-stage linear voltage stabilizing circuit in parallel;
the second-stage linear voltage stabilizing circuit comprises a diode D5, a resistor R6, an NPN tube Q2, a voltage stabilizing tube ZD3 and a diode TVS1, wherein the negative electrode of the diode D5 is connected with one end of the resistor R6 in parallel, the power output end of the first-stage linear voltage stabilizing circuit and the collector of the NPN tube Q2, the other end of the resistor R6 is connected with the negative electrode of the voltage stabilizing tube ZD3 and the base of the NPN tube Q2 in parallel, the positive electrode of the voltage stabilizing tube ZD3 is grounded, the emitter of the NPN tube Q2 is connected with the positive electrode of the diode D5, the negative electrode of the diode TVS1 and the power input end of the filter circuit in parallel, and the positive electrode of the diode TVS1 is grounded.
Further, the filter circuit comprises a capacitor C3 and a capacitor C4, one end of the capacitor C3 is connected with one end of the capacitor C4 in parallel, the power output end of the voltage stabilizing circuit and the power input end of the load circuit, and the other end of the capacitor C3 and the other end of the capacitor C4 are grounded in common.
Further, the load circuit comprises a resistor R7 and an indicator light LED1, one end of the resistor R7 is connected with a power output end and an output load end of the filter circuit in parallel, the output load end is connected with an external load, the other end of the resistor R7 is connected with the positive electrode of the indicator light LED1, and the negative electrode of the indicator light LED1 is grounded.
Further, the diode TVS1 selects a transient voltage suppression diode.
Advantageous effects
The utility model aims at the problems, and through rationalizing the power circuit, the voltage reducing circuit, the protection circuit, the voltage stabilizing circuit, the filter circuit and the load circuit are adopted, so that the reduction of the resistor volume, the reduction of the heating value, the reduction of the power consumption of the whole machine, the reduction of the current of the whole machine, the stabilization of the output power supply and the like can be realized; the volume of the power supply circuit can be reduced by adopting the metal film resistor of the voltage reduction circuit; the secondary linear voltage stabilizing circuit is adopted for stabilizing voltage output, so that the output voltage can be improved (for example, the output voltage is improved from 48V to 110V) during primary linear voltage stabilizing output; by adopting two voltage stabilizing tubes connected in series, the output voltage can be improved, and the output current can be reduced; the output voltage is increased, so that the voltage drop of the NPN tube Q1 is reduced, the current is reduced, the energy consumption is reduced, the heat generation is less, and a radiating fin and the like are not needed; when the high voltage takes 220VAC input, half-wave rectification and bridge rectification are adopted, so that power consumption and the like can be further reduced. The power supply circuit can realize integration with reduced volume, and auxiliary heat dissipation of a heat sink is not needed.
Drawings
Fig. 1 is a schematic diagram of a system structure of a low-power consumption linear power supply circuit according to the present utility model.
Fig. 2 is a schematic circuit diagram of a low-power consumption linear power supply circuit according to the present utility model.
Reference numerals: 01. an external power source; 02. a step-down circuit; 03. a protection circuit; 04. a voltage stabilizing circuit; 05. a filter circuit; 06. and a load circuit.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-2, the present utility model provides a low-power consumption linear power circuit, which includes: a step-down circuit 02, a protection circuit 03, a voltage stabilizing circuit 04, a filter circuit 05, and a load circuit 06; the voltage reduction circuit 02 selects resistance voltage division voltage reduction, the power input end of the voltage reduction circuit 02 comprises a high-voltage power end (220V), a low-voltage power end (110V) and a zero-voltage power end (0V), and the voltage reduction circuit 02 comprises a resistor R1, a resistor R2, a resistor R3 and a diode D1; the protection circuit 03 selects a common mode protection circuit, and the protection circuit 03 comprises a common mode inductance T1, a capacitor C1, a piezoresistor RV1, a bridge rectifier DB1 and a capacitor C2; the voltage stabilizing circuit 04 selects a two-stage linear voltage stabilizing circuit, and the two-stage linear voltage stabilizing circuit comprises a resistor R4, a resistor R5, a diode D4, a diode D5, an NPN tube Q1, a capacitor C16, a resistor R6, an NPN tube Q2, a voltage stabilizing tube ZD1, a voltage stabilizing tube ZD2, a voltage stabilizing tube ZD3 and a diode TVS1; the filter circuit 05 includes a capacitor C3 and a capacitor C4; the load circuit 06 comprises a resistor R7 and an indicator light LED1;
one end of the resistor R1 is connected with high voltage (220V) of an external power supply, the other end of the resistor R1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with the positive electrode of the diode D1, the negative electrode of the diode D1 is connected with low voltage (110V) of the external power supply and the first end of the power supply input end of the common-mode inductor T1 in parallel, one end of the resistor R3 is connected with zero voltage (0V) of the external power supply, and the other end of the resistor R3 is connected with the second end of the power supply input end of the common-mode inductor T1; the first end of the power output end of the common-mode inductor T1 is connected with one end of a capacitor C1, one end of a piezoresistor RV1 and the first input end of a bridge rectifier DB1 in parallel, the second end of the power output end of the common-mode inductor T1 is connected with the other end of the capacitor C1, the other end of the piezoresistor RV1 and the second input end of the bridge rectifier DB1 in parallel, the first output end of the bridge rectifier DB1 is connected with the positive electrode of a capacitor C2 and one end of a resistor R4 in parallel, and the second output end of the bridge rectifier DB1 and the negative electrode of the capacitor C2 are grounded in common; one end of a resistor R4 is also connected with the collector of the NPN tube Q1 and the negative electrode of the diode D4 in parallel, the other end of the resistor R4 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with the negative electrode of the voltage stabilizing tube ZD1 and the base electrode of the NPN tube Q1 in parallel, the positive electrode of the voltage stabilizing tube ZD1 is connected with the negative electrode of the voltage stabilizing tube ZD2, the positive electrode of the voltage stabilizing tube ZD2 is grounded, the emitter of the NPN tube Q1 is connected with the positive electrode of the diode D4, one end of a capacitor C16, the negative electrode of the diode D5, one end of a resistor R6 and the collector of the NPN tube Q2 in parallel, the other end of the resistor R6 is connected with the negative electrode of the voltage stabilizing tube ZD3 and the base electrode of the NPN tube Q2 in parallel, the positive electrode of the NPN tube Q2 is connected with the positive electrode of the diode D5, the negative electrode of the diode TVS1 and one end of the capacitor C3 in parallel, and the positive electrode of the diode TVS1 is grounded; one end of a capacitor C3 is connected with one end of a capacitor C4 and one end of a resistor R7 in parallel, and the other end of the capacitor C3 and the other end of the capacitor C4 are grounded together; and one end of the resistor R7 is also connected with an output load end, the output load end is connected with an external load, the other end of the resistor R7 is connected with the positive electrode of the indicator light LED1, and the negative electrode of the indicator light LED1 is grounded.
The diode TVS1 selects a transient voltage suppression diode; the resistor R1 and the resistor R2 are metal film resistors.
The specific implementation principle of the utility model patent: the three power terminals are used for inputting corresponding power supply voltages, (1) a high-voltage 220V power supply is used for reducing the voltage through metal film resistors R1 and R2, when 220VAC is selected for inputting the high voltage, the half-wave rectification is carried out through a diode D1, the heating power consumption on R1 and R2 is reduced, the diode D1 can be used for outputting the voltage unidirectionally, the voltage is transmitted to a bridge rectification DB1 through a common mode inductor T1 and enters a first-stage linear voltage stabilizing circuit, the output voltage of the circuit can be 110V, the output voltage is improved, the voltage drop of an NPN tube Q1 is reduced, the output current is reduced by combining the serial connection of two voltage stabilizing tubes ZD1 and ZD2, the output voltage is increased, the heating value of the NPN tube Q1 is reduced, a radiating fin is not needed, and meanwhile the power supply volume is reduced; the stable output voltage is realized through the second-stage linear voltage stabilizing circuit to the TVS tube and the filter capacitor;
or (2) when the low voltage is 110VAC input, the high voltage terminal is in a suspended state, and is transmitted to the bridge rectifier DB1 through the common mode inductor T1 to enter the first-stage linear voltage stabilizing circuit, so that the output voltage of the circuit is 110V, the output voltage is improved, the voltage drop of the NPN tube Q1 is further reduced, the output current is reduced by combining the serial connection of the two voltage stabilizing tubes ZD1 and ZD2, the output voltage is increased, the heating value of the NPN tube Q1 is reduced, a radiating fin is not required, and meanwhile, the power supply volume is reduced; and the stable output voltage is realized through the second-stage linear voltage stabilizing circuit to the TVS tube and the filter capacitor.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A low power consumption linear power supply circuit, the linear power supply circuit comprising: the voltage stabilizing circuit comprises a voltage reducing circuit, a protection circuit, a voltage stabilizing circuit, a filter circuit and a load circuit, wherein the power input end of the voltage reducing circuit is connected with an external power supply, the power output end of the voltage reducing circuit is connected with the power input end of the protection circuit, the power output end of the protection circuit is connected with the power input end of the voltage stabilizing circuit, the power output end of the voltage stabilizing circuit is connected with the power input end of the filter circuit, the power output end of the filter circuit is connected with the power input end of the load circuit, the power output end of the load circuit is externally connected with a load, and the voltage stabilizing circuit is used for stabilizing the voltage output by the voltage reducing circuit and reducing the voltage stabilizing power consumption.
2. The low power consumption linear power supply circuit according to claim 1, wherein the voltage reducing circuit selects a resistor voltage dividing type voltage reduction.
3. The low-power consumption linear power supply circuit according to claim 2, wherein the voltage reducing circuit comprises a resistor R1, a resistor R2, a resistor R3 and a diode D1, one end of the resistor R1 is connected with the high voltage of the external power supply, the other end of the resistor R1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with the positive electrode of the diode D1, the negative electrode of the diode D1 is connected with the low voltage of the external power supply and one end of the power supply input end of the protection circuit in parallel, one end of the resistor R3 is connected with the zero voltage of the external power supply, and the other end of the resistor R3 is connected with the other end of the power supply input end of the protection circuit.
4. The low power consumption linear power supply circuit according to claim 1, wherein the protection circuit is a common mode protection circuit.
5. The low-power consumption linear power supply circuit according to claim 4, wherein the protection circuit comprises a common-mode inductor T1, a capacitor C1, a piezoresistor RV1, a bridge rectifier DB1 and a capacitor C2, wherein a power input end of the common-mode inductor T1 is connected to an external power supply, a first end of a power output end of the common-mode inductor T1 is connected in parallel to one end of the capacitor C1, one end of the piezoresistor RV1 and a first input end of the bridge rectifier DB1, a second end of the power output end of the common-mode inductor T1 is connected in parallel to the other end of the capacitor C1, one end of the piezoresistor RV1 and a second input end of the bridge rectifier DB1, a first output end of the bridge rectifier DB1 is connected in parallel to a positive electrode of the capacitor C2 and a power input end of the voltage stabilizing circuit, and a second output end of the bridge rectifier DB1 is commonly grounded to a negative electrode of the capacitor C2.
6. The low power consumption linear power supply circuit according to claim 1, wherein the voltage stabilizing circuit is a two-stage linear voltage stabilizing circuit.
7. The low-power consumption linear power supply circuit according to claim 6, wherein the voltage stabilizing circuit comprises a resistor R4, a resistor R5, a diode D4, a diode D5, an NPN tube Q1, a capacitor C16, a resistor R6, an NPN tube Q2, a voltage stabilizing tube ZD1, a voltage stabilizing tube ZD2, a voltage stabilizing tube ZD3 and a diode TVS1, one end of the resistor R4 is connected in parallel with a power supply output end of the protection circuit, a collector of the NPN tube Q1 and a cathode of the diode D4, the other end of the resistor R4 is connected with one end of the resistor R5, the other end of the resistor R5 is connected in parallel with a cathode of the voltage stabilizing tube ZD1 and a base of the NPN tube Q1, an anode of the voltage stabilizing tube ZD1 is connected with an anode of the voltage stabilizing tube ZD2, an anode of the voltage stabilizing tube ZD2 is grounded, an emitter of the NPN tube Q1 is connected in parallel with an anode of the diode D4, one end of the capacitor C16, an anode of the resistor R6 and a cathode of the diode Q2 are connected with a cathode of the voltage stabilizing tube Q2, and the other end of the resistor Q6 is connected with the anode of the voltage stabilizing tube Q2 in parallel with the anode of the voltage stabilizing tube Q2.
8. The low-power consumption linear power supply circuit according to claim 1, wherein the filter circuit comprises a capacitor C3 and a capacitor C4, one end of the capacitor C3 is connected with one end of the capacitor C4, the power output end of the voltage stabilizing circuit and the power input end of the load circuit in parallel, and the other end of the capacitor C3 and the other end of the capacitor C4 are grounded in common.
9. The low-power consumption linear power supply circuit according to claim 1, wherein the load circuit comprises a resistor R7 and an indicator light LED1, one end of the resistor R7 is connected with a power supply output end and an output load end of the filter circuit in parallel, the output load end is connected with an external load, the other end of the resistor R7 is connected with the positive electrode of the indicator light LED1, and the negative electrode of the indicator light LED1 is grounded.
10. A low power consumption linear power supply circuit according to claim 7, characterized in that the diode TVS1 selects a transient voltage suppression diode.
CN202320185488.4U 2023-02-11 2023-02-11 Low-power-consumption linear power supply circuit Active CN219420578U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320185488.4U CN219420578U (en) 2023-02-11 2023-02-11 Low-power-consumption linear power supply circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320185488.4U CN219420578U (en) 2023-02-11 2023-02-11 Low-power-consumption linear power supply circuit

Publications (1)

Publication Number Publication Date
CN219420578U true CN219420578U (en) 2023-07-25

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