Patent ID: 7997925
Filing Date: 2011-08-16
Classification: H01R

Abstract:
1. A multifunctional wall socket for mounting in a wall and wired to conventional AC line power, the wall socket having a socket cover, the socket cover having a conventional power connector positioned therein, said conventional power connector being connectable to AC line power, and a USB port is further arranged in said socket cover, an AC-DC conversion module is arranged in said socket, an input terminal of the AC-DC conversion module is connected to the AC line power, an output terminal thereof is connected to the USB port, outputting DC power and wherein said AC-DC conversion module includes a rectifier filter module, a modulation step-down module; a current sampling and protection module; a voltage reference module and a feedback control module, the rectifier filter module and the modulation step-down module being connected in sequence; the current sampling and protection module and the voltage reference module being connected to the feedback control module, the output of the feedback control module being connected to the modulation step-down module, wherein, said rectifier filter module performs rectification and filter processing on the AC input, generating a coarsely-adjusted DC to output to the modulation step-down module; said modulation step-down module generates a modulation signal through a transformer and a switching chip, outputting a secondary DC voltage to the current sampling and protection module and the voltage reference module after rectification and filtering; said current sampling and protection module acquires a feedback current, and transmits an over-current signal to the feedback control module, to control the parameters of the feedback current; said voltage reference module transmits a voltage signal to the feedback control module, outputting a DC voltage in conformity with the electrical parameters of a standard USB port through the voltage reference module and the feedback control module; said feedback control module feeds back current control signal and voltage control signal to the modulation step-down module.