AN556
Description
The 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 (dedicated to IGBT driving), a switch dropout voltage monitoring, the possibility to give a negative bias to the gate, the external programmability of safety thresholds and delays, the syncronisation and edge aligning and a powerful buffer of ±8A with split output. To introduce the device see fig.1 which shows the functional diagram: Figure 1. L6353
- Functional diagram at .D w h S a ee
U 4 t m o .c
AN556 APPLICATION NOTE THE L6353: A SMART GATE DRIVER by: C. Adragna and G. andatore
2.5V 300m A SELECT
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1.25V
- INPUT w
INV-OUT ALARM w
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- w t a .D
FILTER 200ns 3.75V
S a
DELAY e h
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- U 4 t e
.c m o
Supply UV Lockout References
VPOS
OUT1 OUT1 CLAMPING...
