Plug-in and pull-out electric spark eliminating circuit on DC power supply

Abstract

The utility model relates to the technical field of power supply circuits, in particular to a plug-in electric anti-spark circuit on a DC power supply, which comprises an input interface used for being connected with the DC power supply, a power supply output end, an RC delay filter circuit, a delay conduction circuit used for suppressing transient high voltage, a first resistor, a second resistor, a third resistor and an anti-shake circuit. One end of the RC time-delay filter circuit is electrically connected with the input interface, and the other end of the RC time-delay filter circuit is electrically connected with the anti-shake circuit, so that the spark phenomenon at the power-on moment of relatively high voltage can be effectively eliminated by skillfully utilizing the cooperation between the RC time-delay filter circuit and the time-delay conduction circuit and adopting a time-delay power supply mode; and meanwhile, the RC delay filter circuit effectively protects the circuit, effectively eliminates clutters carried by the power supply and stabilizes the voltage of a subsequent power supply circuit, the stability and safety of the system are effectively improved, stable connection and disconnection of the power supply are ensured, the structure is simple, and the manufacturing cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to power supply circuit technical field, concretely relates to a DC power supply plug -in electric spark -arresting circuit. BACKGROUND

[0002] The traditional soundbar product is equipped with an adapter when connecting the city electricity, when the power cord connector of the sound box is inserted with the interface of the adapter, the DC power supply is easy to have spark, if the spark is big, it can pop out and hurt people, even cause fire. Therefore, a DC power supply plug-in electric spark-arresting circuit is needed. INVENTION CONTENTS

[0003] The utility model discloses a DC power supply plug-in electric spark-arresting circuit to solve the spark phenomenon of DC socket at the moment of power-on.

[0004] In order to achieve the above purpose, the utility model takes the technical scheme that a DC power supply plug-in electric spark-arresting circuit, including the input interface for connecting DC power supply, power output end, RC delay filter circuit, delay conduction circuit for inhibiting transient high voltage, first resistance, second resistance, third resistance and anti-jitter circuit, one end of RC delay filter circuit and input interface electrical connection, the other end and anti-jitter circuit electrical connection, power output end and delay conduction circuit electrical connection, one end of first resistance and input interface electrical connection, the other end and delay conduction circuit electrical connection, second resistance and third resistance are connected in series, one end and RC delay filter circuit electrical connection, the other end and anti-jitter circuit electrical connection.

[0005] Further, the delay conduction circuit includes a first capacitor and a P-channel MOS tube, one end of the first capacitor is electrically connected to the input interface, the other end is electrically connected to the first resistor, the source of the P-channel MOS tube is electrically connected to the first capacitor, and the gate of the P-channel MOS tube is electrically connected to the first resistor; the drain of the P-channel MOS tube is connected with a power supply.

[0006] Further, the RC delay filter circuit includes a fourth resistor and a second capacitor, one end of the fourth resistor is electrically connected to the input interface, the other end is electrically connected to the anti-jitter circuit, one end of the second capacitor is electrically connected to the anti-jitter circuit, the other end is electrically connected to the second resistor.

[0007] Further, the spark elimination circuit further comprises a switch circuit, the switch circuit comprising a triode and a fifth resistor, one end of the fifth resistor being electrically connected with the collector of the triode, the other end of the fifth resistor being electrically connected with the gate of the P-channel MOS tube, the emitter of the triode being electrically connected with the third resistor, and the base of the triode being electrically connected with the second resistor.

[0008] The utility model discloses a kind of to be used to the method for the preparation of the compound of formula (I) and the use thereof.

[0009] The DC power plug-in and plug-out electric spark elimination circuit is characterized in that: the RC delay filter circuit and the delay conduction circuit are cooperated, the delay power supply mode is adopted, the spark phenomenon of high voltage power-on instant is effectively eliminated, the RC delay filter circuit effectively protects the circuit, the noise carried by the power supply is effectively eliminated, the voltage of the subsequent power supply circuit is stabilized, the stability and safety of the system are effectively improved, the power supply is ensured to be smoothly connected and disconnected, the structure is simple, the manufacturing cost is low, and the power supply is ensured to be smoothly connected and disconnected. BRIEF DESCRIPTION OF DRAWINGS

[0010] The utility model disc The utility model provides a kind of circuit principle diagram of DC power supply on the DC power plug-in and plug-out electric spark elimination circuit. DETAILED DESCRIPTION

[0011] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0012] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0013] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the present application.

[0014] The utility model provides a DC power supply on plug -in electric spark elimination circuit.

[0015] In the embodiment of the utility model, as shown in ​ The DC power supply on plug-in electric spark elimination circuit, including the input interface for connecting DC power supply, power output end, RC delay filter circuit, delay conduction circuit for inhibiting transient high voltage, first resistance, second resistance, third resistance and anti -shake circuit, one end of RC delay filter circuit is connected with input interface electricity, the other end is connected with anti -shake circuit electricity, power output end is connected with delay conduction circuit electricity, one end of first resistance is connected with input interface electricity, the other end is connected with delay conduction circuit electricity, second resistance and third resistance are connected in series, one end is connected with RC delay filter circuit electricity, the other end is connected with anti -shake circuit electricity.

[0016] In the embodiment, the delay conduction circuit includes a first capacitor and a P-channel MOS tube, one end of the first capacitor is electrically connected with the input interface, the other end is electrically connected with the first resistor, the source of the P-channel MOS tube is electrically connected with the first capacitor, the gate of the P-channel MOS tube is electrically connected with the first resistor; the drain of the P-channel MOS tube is connected with a power supply.

[0017] In the embodiment, the RC delay filter circuit includes a fourth resistor and a second capacitor, one end of the fourth resistor is electrically connected with the input interface, the other end is electrically connected with the anti-shake circuit, one end of the second capacitor is electrically connected with the anti-shake circuit, the other end is electrically connected with the second resistor.

[0018] In the embodiment, the spark elimination circuit further includes a switching circuit, the switching circuit includes a triode and a fifth resistor, one end of the fifth resistor is electrically connected with the collector of the triode, the other end is electrically connected with the gate of the P-channel MOS tube, the emitter of the triode is electrically connected with the third resistor, the base of the triode is electrically connected with the second resistor.

[0019] The application is based on controlling the on-off between the input interface of DC power supply and the power output terminal SYS_power.

[0020] Specifically, J1 is an input interface for connecting a DC power supply, wherein the input interface is a socket, Q1 is a P-channel MOS tube, Q2 is a triode, an RC delay filter circuit is formed by the fourth resistor R4 and the second capacitor C8, and an anti-shake circuit is formed by R10 and the second capacitor C8, wherein the delay conduction circuit is formed by the first capacitor C82 and the P-channel MOS tube Q1, and the first capacitor C82 is a delay capacitor between the gate and the source of the P-channel MOS tube.

[0021] The specific working principle is as follows:

[0022] When an external DC power supply is inserted into the input interface J1 to provide power input for the device, the P-channel MOS tube Q1 will not be immediately turned on. The fourth resistor R4 and the second capacitor C8 form an RC delay filter circuit, +18V_DCIN first charges the second capacitor C8, the voltage of the second capacitor C8 and the base voltage of the triode Q2 gradually rise, until the base voltage of the triode Q2 is greater than the conduction voltage, the triode Q2 is turned on, and the collector of Q2 and the gate G of the P-channel MOS tube Q1 are pulled to low level.

[0023] The first capacitor C82 is connected in parallel between the gate G and the source S of the P-channel MOS tube, since the P-channel MOS tube is pulled to low level, +18V_DCIN starts to charge the first capacitor C82, and the first capacitor C82 plays a role of delay conduction here, when the voltage VGS between the two ends of the first capacitor C82 reaches the conduction voltage of the P-channel MOS tube Q1, the P-channel MOS tube is turned on.

[0024] The anti-shake circuit is mainly used to prevent the voltage fluctuation caused by poor contact during power plug-in from affecting the normal work of the P-channel MOS tube Q1. R10 and the second capacitor C8 work together to filter out these short-term voltage fluctuations, ensuring the stable conduction or cutoff state of the triode Q2.

[0025] When the external DC power supply is inserted into the input interface J1, the P-channel MOS tube Q1 will not be immediately turned on, but will be turned on after a time delay determined by the fourth resistor R4, the second capacitor C8 and the first capacitor C82. This process effectively avoids the transient peak current that may be generated during power plug-in, reduces the impact on the rear-end circuit, and avoids the spark phenomenon that may occur during plug-in, thereby improving the reliability and safety of the system

[0026] Through RC delay filter circuit and first capacitor C82, P channel MOS transistor will be turned on after inserting DC power for a period of time, avoid the DC power directly for the equipment back end power supply moment, to the back end load, such as the charging speed of capacitor is too fast, the problem of transient peak current is successfully eliminated, the problem of spark of DC input power plug is eliminated.

[0027] The above merely describes preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A DC power supply plug-in electrical spark suppression circuit, characterized by, The application relates to a DC power supply device, which comprises an input interface for connecting a DC power supply, a power output end, an RC delay filter circuit, a delay conduction circuit for suppressing transient high voltage, a first resistor, a second resistor, a third resistor and a jitter elimination circuit; one end of the RC delay filter circuit is electrically connected with the input interface, the other end is electrically connected with the jitter elimination circuit, the power output end is electrically connected with the delay conduction circuit; one end of the first resistor is electrically connected with the input interface, the other end is electrically connected with the delay conduction circuit, the second resistor and the third resistor are connected in series, one end is electrically connected with the RC delay filter circuit, the other end is electrically connected with the jitter elimination circuit.

2. The DC power supply plug-in electrical spark suppression circuit of claim 1, wherein, The delay conduction circuit comprises a first capacitor and a P-channel MOS tube; one end of the first capacitor is electrically connected with the input interface, the other end is electrically connected with the first resistor; the source of the P-channel MOS tube is electrically connected with the first capacitor; the gate of the P-channel MOS tube is electrically connected with the first resistor; the drain of the P-channel MOS tube is connected with a power supply.

3. The plug-in DC power supply spark suppression circuit of claim 2, wherein, The RC delay filter circuit comprises a fourth resistor and a second capacitor; one end of the fourth resistor is electrically connected with the input interface, the other end is electrically connected with the jitter elimination circuit; one end of the second capacitor is electrically connected with the jitter elimination circuit, the other end is electrically connected with the second resistor.

4. The plug-in DC power supply spark suppression circuit of claim 3, wherein, The spark elimination circuit further comprises a switching circuit, which comprises a triode and a fifth resistor; one end of the fifth resistor is electrically connected with the collector of the triode, the other end is electrically connected with the gate of the P-channel MOS tube; the emitter of the triode is electrically connected with the third resistor; the base of the triode is electrically connected with the second resistor.

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