Antenna power supply device with accurate current control function on television and power supply method thereof

Abstract

The invention discloses an antenna power supply device with an accurate current control function on a television and a power supply method thereof. The antenna power supply device comprises an AC-to-DC (Alternating Current to Direct Current) circuit, a DC power supply switch, an antenna power supply circuit with the accurate current control function, a power supply voltage detection circuit, a microprocessor unit, a user instruction receiving unit, a display processing unit and an LCD (Liquid Crystal Display), wherein the output of the AC-to-DC circuit is respectively connected to the DC power supply switch, the microprocessor unit, the user instruction receiving unit, the display processing unit and the LCD. According to the antenna power supply device and the power supply method thereof, on one hand, the power supply current of a satellite antenna can be set accurately, and reliable hardware measures for overcurrent protection or short-circuit protection can be provided so as to protect a front-end power supply source from influences; and on the other hand, when the antenna power supply voltage is in short circuit or other faults causing the fact that a satellite antenna has no power supply voltage occur, the microprocessor can be used for intelligently cutting off the power supply of the antenna, and meanwhile, information for prompting a user on an antenna power supply fault is displayed on a television screen.

Description

technical field [0001] The invention relates to a satellite receiving TV set, in particular to an antenna power supply device with precise current control on the TV set and a power supply method thereof. Background technique [0002] At present, satellite receiving TVs usually use ordinary step-up DC-DC or add an LDO at the back end to supply power to the satellite receiving antenna. Provide a rough power supply current; once the antenna power supply is overloaded or short-circuited, timely circuit protection cannot be provided, resulting in front-end power supply voltage fluctuations or current shocks, resulting in failure of the TV system. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide an antenna power supply device with precise current control and a power supply method thereof on a TV set. On the one hand, the power supply current of the satellite antenna can be accurately set, and re...

AI Technical Summary

Problems solved by technology

[0002] At present, satellite receiving TVs usually use ordinary step-up DC-DC or add an LDO at the back end to supply power to the satellite receiving antenna. Provide a rough power supply current; once the antenna power supply is overloaded or short-circuited, timely circuit protection cannot be provided, resulting in front-end power supply voltage fluctuations or current shocks, resulting in failure of the TV system

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