HALF-BRIDGE HIGH VOLTAGE GATE DRIVER HAVING PROTECTION OF TRANSISTOR

摘要

PROBLEM TO BE SOLVED: To dynamically protect an output stage and at the same time to quickly perform turn-on by high current output.

SOLUTION: A gate drive integrated circuit for switching a power transistor using an external controller includes gate drive capability and a low zero input current, and enables the use of bootstrap supplitechnic technique to supply a logic supply voltage. The gate drive integrated circuit detects power transistor non-saturation and protects a non-saturated transistor from a transitional excessive voltage by gently turning off a non-saturated transistor via a soft shut-down sequence. The fault control circuit of the gate drive integrated circuit manages the shortage of a supply voltage and the protection of the non-saturation of a transistor and can communicate with a plurality of gate drive integrated circuits in a polyphase system using an exclusive local network.

COPYRIGHT: (C)2004,JPO&NCIPI