Direct current power supply slow starting circuit of gateway device

A technology of slow-start circuit and gateway equipment, applied in the direction of electrical components, output power conversion devices, etc., can solve the problems of high cost, non-reusable, and inability to suppress power surge current well, and achieve low cost and delay Effective effect of protection time

Active Publication Date: 2013-12-11
广州沐迪信息科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention discloses a DC power supply slow start circuit for gateway equipment, which is used to overcome the problems in the above technical solution that cannot be reused, is expensive, and cannot well suppress the instantaneous impact current generated when the power supply is connected.

Method used

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  • Direct current power supply slow starting circuit of gateway device
  • Direct current power supply slow starting circuit of gateway device
  • Direct current power supply slow starting circuit of gateway device

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0036] combine figure 2 and image 3 Shown is a schematic diagram of the circuit structure and its principle analysis of an embodiment of the present invention, wherein the 220V AC is converted to Vin for the home gateway device through the power adapter, and is output to the home gateway through the slow start circuit Vout for use in the entire circuit system , the circuit includes the conduction control tube, that is, the PMOS tube; the first voltage dividing resistor R1, the second voltage dividing resistor R2, the first capacitor C1 and the second capacitor C2; the first voltage dividing resistor R1, the first capacitor C1 and the second capacitor C2 is connected in parallel, one end of the parallel end is respectively connected to the power adapter and the source 2 of the PMOS transistor,...

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Abstract

The invention discloses a direct current power supply slow starting circuit of a gateway device, and belongs to a power supply control circuit. The direct current power supply slow starting circuit comprises an anti-shake module and a conduction control tube. The anti-shake module is connected with a power adapter and the conduction control tube respectively, and the conduction control tube is connected with the gateway device and is a PMOS tube. The anti-shake module is connected with the grid electrode and the source electrode of the PMOS tube respectively, and the drain electrode of the PMOS tube is connected with the gateway device. The anti-shake module comprises a first resistor, a second resistor, a first capacitor and a second capacitor. A first divider resistor, the first capacitor and the second capacitor are connected in parallel, one end of a parallel end is connected with the power adapter and the source electrode of the PMOS tube respectively, and the other end of the parallel end is connected with the ground through a second divider resistor. The direct current power supply slow starting circuit has the advantages that the circuit is constructed by discrete passive devices, cost is low, the circuit can be restored and acted many times, delay protection time is more effective, and the circuit can bear larger instant impact currents which are loaded by the household gateway device.

Description

technical field [0001] The invention relates to a power supply control circuit, in particular to a DC power supply slow start circuit of a gateway device. Background technique [0002] In the circuit system of the home gateway, the instantaneous excessive inrush current caused by the instantaneous plugging and unplugging of the power port will affect the normal operation of the device and damage electronic components, and the best way to suppress the inrush current is to use the slow start of the voltage to achieve the purpose. If there is no slow start protection circuit, at the moment when the power adapter is connected, it will cause excessive inrush current due to a large amount of capacitive load, which may cause damage to components in the home gateway device or due to excessive inrush current As a result, the adapter enters the protection state and cuts off the power supply to the load gateway device, making the product unable to work normally. Therefore, adding such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/36
Inventor 唐姝旻
Owner 广州沐迪信息科技有限公司
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