Anti-static switching power supply

Abstract

The utility model discloses an anti-static switching power supply, which relates to the technical field of switching power supplies and comprises an input end, a control device and an output end, 220V alternating current is input into the input end through a power line and is output to the control device through a filter, a rectification filter circuit, a power conversion circuit, a controller circuit and an output rectification filter circuit, and the output end is connected with the control device. The control device outputs direct current working voltage through the output end, a discharge tube unit is arranged between the input end and the output end in a connected mode, and the discharge tube unit releases static electricity to solve the problem that the static electricity damages the switching power supply without increasing leakage current. Wherein the rectifying and filtering circuit comprises a rectifying and filtering unit, the rectifying and filtering unit comprises a diode D1, the diode D1 is connected with an electrolytic capacitor EC1, and the input end inputs 220V alternating current through a power line. The discharge tube is connected between the high-voltage end and the low-voltage end of the switching power supply, so that the switching power supply is prevented from being damaged by static electricity, and leakage current is not increased.

Description

Technical Field

[0001] The utility model relates to the technical field of switching power supplies, in particular to an anti-static switching power supply. Background Art

[0002] The main circuit of the switching power supply is composed of input electromagnetic interference filter (EMI), rectifier filter circuit, power conversion circuit, PWM controller circuit, and output rectifier filter circuit. The auxiliary circuits include input over-voltage and under-voltage protection circuit, output over-voltage and under-voltage protection circuit, output overcurrent protection circuit, output short-circuit protection circuit, etc.

[0003] In the prior art, the switching power supply is prone to burn out when the leakage current needs to be controlled and there is strong static electricity. Therefore, we propose an anti-static switching power supply to solve the above problem. Utility Model Content

[0004] The purpose of the utility model is to provide an anti-static switching power supply to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-static switching power supply, comprising: an input end, a control device and an output end, wherein the input end inputs 220V AC power through a power line, and outputs the power to the control device through a filter, a rectifier filter circuit, a power conversion circuit, a controller circuit, and an output rectifier filter circuit, and the control device outputs a DC working voltage through the output end, and a discharge tube unit is connected between the input end and the output end, and the static electricity is released by the discharge tube unit to solve the damage of the static electricity to the switching power supply without increasing the leakage current; wherein:

[0006] The rectification and filtering circuit includes a rectification and filtering unit. The rectification and filtering unit includes a diode D1. The diode D1 is connected to an electrolytic capacitor EC1.

[0007] Preferably, the input end inputs 220V AC power through a power line, and outputs DC 24V, 12V, and 5V to the control device through a filter, a rectifier and filter circuit, a power conversion circuit, a controller circuit, and an output rectifier and filter circuit. The control device outputs a DC 24V working voltage through the output end.

[0008] Preferably, the controller circuit includes a controller unit, the controller unit includes an electrolytic capacitor EC2 connected to alternating current, the electrolytic capacitor EC2 is connected to a diode D4 and a diode D5, the diode D4 and the diode D5 are connected in parallel to a resistor R3 and a capacitor C2, the resistor R3 and the capacitor C2 are connected in parallel to a transistor Q2, the transistor Q2 is connected to a diode D3 and a transistor Q1, and a resistor R2 is provided on the connecting line at one end of the transistor Q1.

[0009] Preferably, the discharge tube unit includes a discharge tube TVS1, and the discharge tube TVS1 is connected to a discharge tube TVS2.

[0010] Preferably, the diode D1 is of model 1N4007, and the electrolytic capacitor EC1 is of model 4.7uF / 400V.

[0011] Preferably, the electrolytic capacitor EC2 is 22uF / 25V, the diode D3 and the diode D4 are both 1N4148, and the resistor R2 is 150K.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. Anti-static switching power supply avoids the situation that the existing switching power supply is easy to burn out under the action of strong static electricity when the leakage current needs to be controlled. By connecting a discharge tube between the high and low voltage ends of the switching power supply, static electricity is prevented from damaging the switching power supply and the leakage current is ensured not to increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a circuit diagram of the anti-static switching power supply in the utility model. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1 An anti-static switching power supply includes: an input end, a control device and an output end. The input end inputs 220V AC power through a power line, and outputs it to the control device through a filter, a rectifier filter circuit, a power conversion circuit, a controller circuit, and an output rectifier filter circuit. The control device outputs a DC working voltage through the output end. A discharge tube unit is connected between the input end and the output end. The discharge tube unit includes a discharge tube TVS1. The discharge tube TVS1 is connected to a discharge tube TVS2. The static electricity is released by the discharge tube unit to solve the damage of the static electricity to the switching power supply without increasing the leakage current.

[0017] The input end inputs 220V AC power through the power line, and outputs DC 24V, 12V, and 5V to the control device through the filter, rectifier and filter circuit, power conversion circuit, controller circuit, and output rectifier and filter circuit. The control device outputs DC 24V working voltage through the output end.

[0018] The rectifier and filter circuit includes a rectifier and filter unit. The rectifier and filter unit includes a diode D1. The diode D1 is connected to an electrolytic capacitor EC1. The diode D1 is 1N4007 and the electrolytic capacitor EC1 is 4.7uF / 400V.

[0019] The controller circuit includes a controller unit, which includes an electrolytic capacitor EC2 connected to the alternating current, the electrolytic capacitor EC2 is connected to a diode D4 and a diode D5, the diode D4 and the diode D5 are connected to a resistor R3 and a capacitor C2, the resistor R3 and the capacitor C2 are connected to a transistor Q2, the transistor Q2 is connected to a diode D3 and a transistor Q1, and a resistor R2 is provided on a connecting line at one end of the transistor Q1. The electrolytic capacitor EC2 is 22uF / 25V, the diode D3 and the diode D4 are both 1N4148, and the resistor R2 is 150K.

[0020] The anti-static switching power supply solves the problem that some switching power supplies on the current market are easily burned out under strong static electricity. By connecting a discharge tube between the high and low voltage ends of the switching power supply, the damage to the switching power supply caused by static electricity is solved and the leakage current is not increased.

[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-static switching power supply, characterized in that ,include: An input end, a control device and an output end, wherein the input end inputs 220V AC power through a power line, and outputs the power to the control device through a filter, a rectifier filter circuit, a power conversion circuit, a controller circuit, and an output rectifier filter circuit, and the control device outputs a DC working voltage through the output end, and a discharge tube unit is connected between the input end and the output end, and the discharge tube unit releases static electricity to solve the damage of static electricity to the switching power supply without increasing the leakage current; wherein: The rectification and filtering circuit includes a rectification and filtering unit. The rectification and filtering unit includes a diode D1. The diode D1 is connected to an electrolytic capacitor EC1.

2. The anti-static switching power supply according to claim 1, characterized in that: The input end inputs 220V AC power through a power line, and outputs DC 24V, 12V, and 5V to the control device through a filter, a rectifier and filter circuit, a power conversion circuit, a controller circuit, and an output rectifier and filter circuit. The control device outputs a DC 24V working voltage through the output end.

3. The anti-static switching power supply according to claim 1, characterized in that: The controller circuit includes a controller unit, which includes an electrolytic capacitor EC2 connected to alternating current, the electrolytic capacitor EC2 is connected to a diode D4 and a diode D5, the diode D4 and the diode D5 are connected in parallel to a resistor R3 and a capacitor C2, the resistor R3 and the capacitor C2 are connected in parallel to a transistor Q2, the transistor Q2 is connected to a diode D3 and a transistor Q1, and a resistor R2 is provided on a connecting line at one end of the transistor Q1.

4. The anti-static switching power supply according to claim 1, characterized in that: The discharge tube unit includes a discharge tube TVS1, and the discharge tube TVS1 is connected to a discharge tube TVS2.

5. The anti-static switching power supply according to claim 1, characterized in that: The diode D1 is of model 1N4007, and the electrolytic capacitor EC1 is of model 4.7uF / 400V.

6. The anti-static switching power supply according to claim 3, characterized in that: The electrolytic capacitor EC2 is 22uF / 25V, the diode D3 and the diode D4 are both 1N4148, and the resistor R2 is 150K.

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