1EDI2004AS View Datasheet(PDF) - Infineon Technologies
Part Name
Description
MFG CO.
'1EDI2004AS' PDF : 138 Pages View PDF
EiceDRIVERTM SIL
1EDI2004AS
Functional Description
2.4.6 Driver Functionality
The structure of the output stage and its associated external booster of the device is depicted Figure 12:
VCC 2
TON
GATE
EiceDRIVER
SIL
TOFF
DACLP
VEE2
TONI VCC2 ACLI
TOFFI
Ron
TONO
TOFFO
EiceDRIVER
Ro f f
Boost
ASC
DACLP
VEE2
GND2
AMCLP
GND2
Figure 12 Output Stage Diagram of Principle
Note:
Note:
AMCLP usage is recommended at unipolar supply.
For usage without EiceDRIVER Boost Infineon takes no responsibilities for any cross currents.
2.4.6.1 Overview
Two turn-off behaviors are supported by the device, depending on the event causing the turn-off action.
• Regular Turn-Off.
• Safe Turn-Off.
A Safe Turn-Off sequence uses the timing and plateau level parameters defined in register SSTTOF. It is
triggered by a DESAT or an OCP event only. A turn-off sequence which is not “Safe” is then “Regular”. A Regular
Turn-Off sequence uses the timing defined in register SRTTOF.
Two Level Turn-Off (TTOFF)
Because a hard turn-off may generate a critical overvoltage on the IGBT leading eventually to its destruction,
the 1EDI2004AS supports the Two Level Turn-Off functionality (TTOFF). The TTOFF function consists in
switching the IGBT off in three steps in such a way that:
1. The IGBT gate voltage is first decreased with a reduced slew rate until a specific (and programmable)
voltage is reached by the TOFF signal.
2. TOFF (and TON) voltage is stabilized at this level. The IGBT Gate voltage forms thus a plateau.
3. Finally, the switch-off sequence is resumed using hard commutation.
Data Sheet
37
Rev. 2.0
2019-01-16
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