Patent ID: 6362610
Filing Date: 2002-03-26
Classification: G06F

Abstract:
A universal serial bus (USB) power supply unit comprising:a USB port connector used to plug into the jack of the USB port; and a charging connector used to plug into the jack of the electronic products to be charged; wherein the current flowing into said USB port connector will then pass through an automatic voltage regulator; and wherein said automatic voltage regulator (6) includes: a DC voltage transformer (62) transforming the DC voltage (5V) coming from said USB port to the required voltage supplied to a power/signal connecting jack; and a feedback control voltage output circuit comparing the feedback voltage signal of said power/signal connecting jack and enabling the DC voltage transformer to output a preset voltage; and wherein said charging connector is fitted with a power cord which includes a power/signal connecting connector to fit the power/signal connecting jack so that an electric connection is enabled, and wherein a required voltage parameter is preset within the charging connector by means of a variable resistor.