Set-top box and standby control method thereof

Abstract

The invention discloses a set-top box and a standby control method thereof. The set-top box comprises a switch, a power supply unit and a converting circuit, wherein the switch comprises a master chip with a plurality of units; the power supply unit is used for directly outputting voltage to the units, which are related to the standby state, in the master chip and used for outputting voltage to the units, which are not related to the standby state, in the master chip through the switch; the converting circuit is used for changing the voltage output by the power supply unit according to the width of an output impulse of the master chip; the master chip is used for switching off the switch when the set-top box is to be standby and for adjusting the width of the output impulse; and when the system is aroused, the switch is switched on, and the width of the output impulse is restored. The invention can further reduce the power consumption of a main board in the standby state under the premise that the functions of normal working and standby arousing of the set-top box are met.

Description

technical field [0001] The invention relates to the field of cable television, in particular to a set-top box and a standby control method thereof. Background technique [0002] In traditional applications, the single-chip standby circuit is used to control the standby and wake-up functions of the set-top box, but the single-chip standby can only respond to the traditional infrared remote control application, and cannot meet the application of smart terminal users using 2.4G wireless remote control. In a circuit that uses the main chip to stand by, because the power consumption of the high-load power supply in the standby state is difficult to control, the stand-by control of the main chip GPIO (General Purpose Input Output, general-purpose input / output port) has a high standby power consumption of the main board. The problem. [0003] The existing main chip standby processing scheme mainly includes: [0004] One method is to design a separate power supply for the main chi...

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Problems solved by technology

[0009] This circuit relies solely on switches (usually MOS tubes) to control the standby power consumption. Under the required standby specification of less than 1W, when the efficiency of some power chips is not high, the power in the standby state sometimes appears power critical or Situations exceeding specification requirements

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