Reinforced isolated IGBT gate driver with high CMTI and Miller clamp
This post is sponsored by Texas Instruments.
The ISO5851 from Texas Instruments (TI) is a 5.7kVrms, reinforced isolated
gate driver for IGBTs and MOSFETs with 2.5A source and 5A sink current. The
input side operates from a single 3V to 5.5V supply. The output side allows
for a supply range from minimum 15V to maximum 30V. Two complementary CMOS
inputs control the output state of the gate driver. The short propagation
time of 76ns assures accurate control of the output stage.
An internal desaturation (DESAT) fault detection recognizes when the IGBT is
in an overload condition. Upon a DESAT detect the gate driver output is
driven low to VEE2 potential turning the IGBT immediately off.