A DC power supply slow start circuit for gateway equipment

A technology of slow-start circuit and gateway equipment, applied in electrical components, output power conversion devices, etc., can solve the problems of high cost, can not be reused, can not well suppress power surge current, etc., to achieve low cost, delay Effective effect of guard time

Active Publication Date: 2018-02-13
广州沐迪信息科技有限公司
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  • Summary
  • 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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  • A DC power supply slow start circuit for gateway equipment
  • A DC power supply slow start circuit for gateway equipment
  • A DC power supply slow start circuit for gateway equipment

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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 DC power supply slow start circuit for gateway equipment, which belongs to a power supply control circuit, which includes an anti-shake module and a conduction control tube; the anti-shake module is respectively connected to a power adapter and a conduction control tube, and the conduction The control tube is connected to the gateway device, and the conduction control tube is a PMOS tube; the anti-shake module is connected to the gate and source of the PMOS tube, and the drain of the PMOS tube is connected to the gateway device. The anti-shake module includes a first resistor, a second resistor, a first capacitor, and a second capacitor; the first voltage dividing resistor, the first capacitor, and the second capacitor are connected in parallel, and one end of the parallel end is respectively connected to the power adapter and the source of the PMOS tube, and the other One end is grounded through the second voltage dividing resistor. The beneficial effect of the present invention is that it provides a low-cost DC voltage slow-start circuit built by discrete passive components, which can be restored and used multiple times, and has a more effective delay protection time, and can withstand a greater load on home gateway equipment instantaneous surge current.

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 Patents(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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