High-voltage low-ripple linear auxiliary source circuit

Abstract

The utility model provides a high-voltage low-ripple linear auxiliary source circuit, which comprises a triode V1 and five three-terminal adjustable voltage stabilizers N1, N2, N3, N4 and N5, and is characterized in that the collector electrode of the triode V1 is used as the input end of the auxiliary source circuit, and the emitter electrode of the triode V1 is used as the output end of the auxiliary source circuit; the anodes of the three-terminal adjustable voltage stabilizers N1, N2, N3 and N4 are respectively connected in series with the cathodes of the three-terminal adjustable voltage stabilizers N2, N3, N4 and N5; the output ends of the resistors R2, R4, R6, R8 and R10 are respectively connected with the reference ends of the three-end adjustable voltage stabilizers N1, N2, N3, N4 and N5 in series, the output ends of the resistors R3, R5, R7, R9 and R11 are respectively connected with the anodes of the three-end adjustable voltage stabilizers N1, N2, N3, N4 and N5 in series, and capacitors C2, C3, C4, C5 and C6 are respectively arranged between the reference ends of the three-end adjustable voltage stabilizers N1, N2, N3, N4 and N5 and the respective anodes of the three-end adjustable voltage stabilizers N1, N2, N3, N4 and N5. According to the utility model, the functions of high voltage, low ripple and linear auxiliary power supply can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of linear power supplies, in particular to a high-voltage and low-ripple linear auxiliary power supply circuit. Background Art

[0002] Currently, the ripple voltage of high-voltage output power modules is relatively large. Some electronic systems have very high requirements for the ripple voltage of high-voltage output power modules. An effective measure to suppress the ripple voltage is to connect a linear voltage regulator to the output end of the power module. However, the supply voltage of most linear voltage regulators on the market is below 36V, which cannot meet the requirements of high-voltage output and low ripple. Utility Model Content

[0003] The purpose of the utility model is to provide a high-voltage, low-ripple linear auxiliary power supply circuit, which can achieve the functions of high voltage, low ripple and linear auxiliary power supply.

[0004] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a high-voltage low-ripple linear auxiliary source circuit, comprising a transistor V1 and five three-terminal adjustable voltage regulators N1, N2, N3, N4, and N5, wherein the collector of the transistor V1 serves as the input terminal of the auxiliary source circuit, and the emitter of the transistor V1 serves as the output terminal of the auxiliary source circuit;

[0005] The anodes of the three-terminal adjustable voltage regulators N1, N2, N3, and N4 are respectively connected in series with the cathodes of the three-terminal adjustable voltage regulators N2, N3, N4, and N5, the cathode of the three-terminal adjustable voltage regulator N1 is connected in series with the base of the transistor V1, and the anode of the three-terminal adjustable voltage regulator N5 is grounded;

[0006] The collector of the transistor V1 is connected in series with the resistor R1 and the capacitor C1 and then grounded, and the base of the transistor V1 is connected to the input end of the capacitor C1;

[0007] The emitter of the transistor V1 is connected in series with resistors R2, R3, R4, R5, R6, R7, R8, R9, R10 and R11 in sequence and then grounded. The output ends of the resistors R2, R4, R6, R8 and R10 are respectively connected in series with the reference ends of the three-terminal adjustable voltage regulators N1, N2, N3, N4 and N5. The output ends of the resistors R3, R5, R7, R9 and R11 are respectively connected in series with the anodes of the three-terminal adjustable voltage regulators N1, N2, N3, N4 and N5. Capacitors C2, C3, C4, C5 and C6 are respectively provided between the reference ends of the three-terminal adjustable voltage regulators N1, N2, N3, N4 and N5 and their respective anodes.

[0008] Preferably, the voltage output range of the auxiliary power circuit is 36V-135V.

[0009] The beneficial effects of the utility model are:

[0010] This solution can support an input voltage higher than 36V. The withstand voltage of a single three-terminal adjustable voltage regulator is 36V. It can be directly used in series according to the actual input voltage range. The output voltage can be achieved by adjusting the voltage divider resistor according to actual needs, which can effectively reduce the output ripple voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification so as to facilitate understanding and reading by those familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes shall still fall within the scope of the technical contents disclosed in this utility model without affecting the efficacy and objectives that can be achieved by the present utility model.

[0015] At the same time, it should be noted that: unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with ordinary skills in the technical field to which the utility model belongs. The meaning of "multiple" used in the patent application specification and claims of this utility model is two or more; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front end", "rear end", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model. Changes or adjustments to their relative relationships, without substantial changes in the technical content, should also be regarded as the scope of implementation of the utility model.

[0016] The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings.

[0017] The utility model discloses a high voltage low ripple linear auxiliary source circuit. Figure 1As shown, the embodiment includes a transistor V1 and five three-terminal adjustable voltage regulators N1, N2, N3, N4, and N5, wherein the collector of the transistor V1 serves as the input terminal of the auxiliary source circuit, and the emitter of the transistor V1 serves as the output terminal of the auxiliary source circuit;

[0018] The anodes of the three-terminal adjustable voltage regulators N1, N2, N3, and N4 are respectively connected in series with the cathodes of the three-terminal adjustable voltage regulators N2, N3, N4, and N5, the cathode of the three-terminal adjustable voltage regulator N1 is connected in series with the base of the transistor V1, and the anode of the three-terminal adjustable voltage regulator N5 is grounded;

[0019] The collector of the transistor V1 is connected in series with the resistor R1 and the capacitor C1 and then grounded, and the base of the transistor V1 is connected to the input end of the capacitor C1;

[0020] The emitter of the transistor V1 is connected in series with resistors R2, R3, R4, R5, R6, R7, R8, R9, R10 and R11 in sequence and then grounded. The output ends of the resistors R2, R4, R6, R8 and R10 are respectively connected in series with the reference ends of the three-terminal adjustable voltage regulators N1, N2, N3, N4 and N5. The output ends of the resistors R3, R5, R7, R9 and R11 are respectively connected in series with the anodes of the three-terminal adjustable voltage regulators N1, N2, N3, N4 and N5. Capacitors C2, C3, C4, C5 and C6 are respectively provided between the reference ends of the three-terminal adjustable voltage regulators N1, N2, N3, N4 and N5 and their respective anodes.

[0021] After the circuit is powered on, three-terminal adjustable voltage regulators N1, N2, N3, N4, and N5 adjust the linear range of transistor V1, achieving high voltage, low ripple, and linear auxiliary power supply. Testing has shown that the auxiliary power supply circuit has an output voltage range of 36V-135V. It can be directly connected in series to meet actual input voltage requirements; the output voltage can be adjusted based on actual needs by adjusting the voltage divider resistor to reduce output ripple voltage.

[0022] It should be noted that the parts not described in detail in the above embodiments are all prior art.

[0023] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the present profession can make slight changes or modifications to equivalent embodiments using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high voltage low ripple linear auxiliary power circuit, characterized by: It includes a transistor V1 and five three-terminal adjustable voltage regulators N1, N2, N3, N4, and N5, wherein the collector of the transistor V1 serves as the input end of the auxiliary source circuit, and the emitter of the transistor V1 serves as the output end of the auxiliary source circuit; The anodes of the three-terminal adjustable voltage regulators N1, N2, N3, and N4 are respectively connected in series with the cathodes of the three-terminal adjustable voltage regulators N2, N3, N4, and N5, the cathode of the three-terminal adjustable voltage regulator N1 is connected in series with the base of the transistor V1, and the anode of the three-terminal adjustable voltage regulator N5 is grounded; The collector of the transistor V1 is connected in series with the resistor R1 and the capacitor C1 and then grounded, and the base of the transistor V1 is connected to the input end of the capacitor C1; The emitter of the transistor V1 is connected in series with resistors R2, R3, R4, R5, R6, R7, R8, R9, R10 and R11 in sequence and then grounded. The output ends of the resistors R2, R4, R6, R8 and R10 are respectively connected in series with the reference ends of the three-terminal adjustable voltage regulators N1, N2, N3, N4 and N5. The output ends of the resistors R3, R5, R7, R9 and R11 are respectively connected in series with the anodes of the three-terminal adjustable voltage regulators N1, N2, N3, N4 and N5. Capacitors C2, C3, C4, C5 and C6 are respectively provided between the reference ends of the three-terminal adjustable voltage regulators N1, N2, N3, N4 and N5 and their respective anodes.

2. The high-voltage, low-ripple linear auxiliary power supply circuit according to claim 1, characterized in that: The voltage output range of the auxiliary power circuit is 36V-135V.

Images