THE L6353: A SMART GATE DRIVER
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w power The superior performance of voltage controlled switch makes this device the preferred one in modern electroni...
Description
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w power The superior performance of voltage controlled switch makes this device the preferred one in modern 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.
Device 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
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AN556 APPLICATION NOTE THE L6353: A SMART GATE DRIVER
by: C. Adragna and G. Comandatore
2.5V 300mA SELECT
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1.25V
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INPUT
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INV-OUT ALARM
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+ -
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FILTER 200ns 3.75V
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DELAY
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Supply UV Lockout References
REF
VPOS
OUT1 OUT1 CLAMPING CLAMP-PROG OUT2 LOGIC
3.15V
THERMAL SHUTDOWN
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VSS 3.15V MON-DELAY
+ -
1.25V
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3.75V VON-SENSE
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ON-LEV-PROG...
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