Direct current power supply slow starting circuit of gateway device

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...

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.

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