ee APPLICATION NOTE
taSh THE L6353:
a A SMART GATE DRIVER
.D by: C. Adragna and G. Comandatore
wwThe superior performance of voltage controlled switch makes this device the preferred one in modern
w power electronics applications.
The L6353 is a new monolithic integrated circuit designed to realise a versatile and smart interface
between the signal circuitry and every kind of voltage controlled power switch, with a minimal design
time and a reduction of parts count.
.cThe L6353 is a smart silicon device which integrates all the circuitry for a versatile and rugged gate
driver. The chip implements several features such as: an easy-to-link signal source by means of either
an optocoupler or pulse transformer, a two-step turn-on procedure of the external power switch (dedi-
cated to IGBT driving), a switch dropout voltage monitoring, the possibility to give a negative bias to the
Ugate, the external programmability of safety thresholds and delays, the syncronisation and edge aligning
and a powerful buffer of ±8A with split output.
t4To introduce the device see fig.1 which shows the functional diagram:
eFigure 1. L6353 - Functional diagram