STMicroelectronics AN556
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.| Part No. | AN556 |
|---|---|
| Datasheet | AN556 Download |
| Manufacturer |  STMicroelectronics |
| Description | THE L6353: A SMART GATE DRIVER |
| Buy | Stock & Price |
DESCRIPTION
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. Comandatore 2.5V 300mA SELECT + 1.25V - INPUT w INV-OUT ALARM w + - w t a .D FILTER 200ns 3.75V S a DELAY e h + - U 4 t e .c m o Supply UV Lockout References REF VPOS OUT1 OUT1 CLAMPING CLAMP-PROG OUT2 LOGIC 3.15V THERMAL SHUTDOWN - VSS 3.15V MON-DELAY + - 1.25V + 3.75V VON-SENSE + ON-LEV-PROG - 7.5V COM AN556/0497 w w w .D a S a t e e h U 4 t m o .c 1/16 AN556 APPLICATION NOTE FUNCTIONALDESCRIPTION
Interfacing L6353 to the signal source A typical switching application requires a good noise immunity on the incoming signal to avoid the switch false triggering (turn-on/turn-off). Besides, electrical isolation and level shifting between the power and the signal parts can be needed. The L6353 is designed with the reference thresholds of control signal at 3.75V on risi...
