Patent ID: 9030794
Filing Date: 2015-05-12
Classification: H02H

Abstract:
1. An electronic fuse apparatus connected between a power side and a system side, the electronic fuse apparatus comprising: a soft starting module configured to receive a first voltage to soft start the electronic fuse apparatus; a voltage-building-up module connected to the soft starting module and configured to receive a second voltage to build up the required voltage when the electronic fuse apparatus is soft started; an electronic fuse having a first terminal, a second terminal, and a driving terminal, wherein the driving terminal is connected to the soft starting module; a short-circuit protection switch having a first terminal, a second terminal, and a driving terminal, wherein the first terminal is connected to the soft starting module, the second terminal is connected to the second terminal of the electronic fuse and the system side, and the driving terminal is connected to the voltage-building-up module; a current-sensing module connected to the first terminal of the electronic fuse and configured to receive the second voltage to detect an operating current flowing from the power side to the system side; and a digital control module connected to the current-sensing module, the soft starting module, and the voltage-building-up module and configured to generate a control signal to control the electronic fuse; wherein when the current-sensing module detects that the operating current is over-current, the digital control module generates the high-level control signal to turn off the electronic fuse to provide an over-current protection; when a short-circuit fault occurs at the system side, the short-circuit protection switch is turned on to turn off the electronic fuse to provide a short-circuit protection.