Circuit and method for suppressing startup instantaneous current of wireless communication terminal

Abstract

The invention belongs to the technical field of communication circuits, and particularly relates to a circuit and a method for suppressing startup instantaneous current of a wireless communication terminal. The circuit comprises a switch, a charging circuit and a bleeder circuit, wherein the switch is arranged between power supply input and power supply output, adopts an MOS field effect transistor, and is also provided with a voltage stabilization protection circuit; the charging circuit is arranged between the switch and the power supply input, adopts a capacitor element, and carries out charging and discharging on electric energy input by the power supply through a capacitor element so as to realize delayed power-on of the circuit; the bleeder circuit is arranged between the switch andthe power supply input and adopts a resistor element to discharge the electric energy charged by the capacitor element; and the bleeder circuit is also provided with a backward diode for acceleratingthe discharge of the electric energy charged by the capacitor element. Through the circuit and the method, the instantaneous power of the communication terminal is reduced, the discharge time is prolonged, and quick secondary startup without instantaneous high power is achieved.

Description

technical field [0001] The invention belongs to the technical field of communication circuits, and in particular relates to a circuit and a method for suppressing the instantaneous current of a wireless communication terminal when it is turned on. Background technique [0002] Instantaneous power, also called peak power, is the maximum power that the power supply can provide in an instant. There is a certain relationship between instantaneous power and rated power, both of which represent the maximum power of the power supply. From experience, the instantaneous power is generally 1.3 to 1.6 times the rated power. But the instantaneous power is not a very important parameter, because the power supply cannot work in such a state for a long time, otherwise it will cause damage to the power supply. However, in some specific scenarios, the instantaneous power of the power supply must be considered to prevent the power supply from being pulled down instantaneously by the device,...

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Problems solved by technology

However, the instantaneous power is not a very important parameter, because the power supply cannot work in such a state for a long time, otherwise it will cause damage to the power supply

However, in some specific scenarios, the instantaneous power of the power supply must be considered to prevent the power supply from being pulled down instantaneously by the device, causing the power supply of the entire system to be unstable and affecting the continuous operation of the overall device

And if the instantaneous power of the equipment is too high, resulting in excessive instantaneous current and damage to the switch or even the equipment, then how to reduce the instantaneous power of the equipment is the focus and competitiveness of communication terminal equipment in this field

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