Power supply control method for terminal equipment and terminal equipment

Abstract

The invention discloses a power supply control method for terminal equipment and the terminal equipment. The method comprises the following steps of: presetting a voltage threshold value in the terminal equipment; comparing the actual voltage value of an external power supply with the voltage threshold value when the terminal equipment is connected with the external power supply; and adjusting the radio frequency transmitting power of the terminal equipment according to a comparison result. By comparing the voltage value of the external power supply with the preset voltage threshold value, whether the external power supply provided by main equipment can meet the power consumption requirement of an external power interface of the terminal equipment is automatically judged; the radio frequency transmitting power of the terminal equipment is adjusted according to the comparison result; and because the adjusted radio frequency transmitting power adapts to the power supply capacity of the main equipment, the problem of the voltage dip of the external power supply or the external power interface caused by over-high power consumption of the terminal equipment is prevented, and the failure rate of the equipment is effectively reduced.

Description

technical field [0001] The present invention relates to the communication field, in particular to a power supply control method of a terminal device and a terminal device. Background technique [0002] Mobile terminal devices mainly based on mobile phones are usually powered by batteries, which are convenient for users to carry around. With the rapid development of mobile communication technology and the widespread popularization of 3G (third generation communication technology), a variety of externally powered communication devices have appeared, such as USB (Universal Serial Bus) interface, EXPRESS (High Speed ​​Serial Bus) interface , PCMCIA (PC Memory Card International Association) interface and other interface forms of data cards, communication boards with MINI-PCIE (miniature PC high-speed serial bus) interface, M2M (machine-to-machine) industrial modules for the Internet of Things, etc., These terminal devices usually do not have a built-in battery, but are connecte...

AI Technical Summary

Problems solved by technology

However, if the current limit value is set too large, for the main device with poor power supply capacity, the voltage of the USB HOST or the terminal may drop due to the excessive current consumption of the terminal device, causing the device failure of the main device or the terminal device; if the current limit value If the setting is too small, the terminal device may enter the current limiting state in advance, such as figure 1 As shown, the current limiting unit 20 adjusts the current input by the external power supply interface 10 to a current limiting value, and after the transformation unit 30 performs transformation processing on the input voltage after the current limiting, if the power amplification factor of the power amplifier 40 is relatively high (such as In the state of poor signal status and the need to increase the power to transmit radio frequency signals), it is easy to cause the voltage of the USB HOST or the terminal device to drop rapidly, and it may still cause the failure of the main device or the terminal device

[0005] Therefore, the existing external power supply method for terminal equipment cannot effectively control the power supply of terminal equipment, which may easily cause equipment failure

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