1EDS20I12SV Datasheet, PDF (18/33 Pages) Infineon Technologies AG – Single-channel isolated IGBT Driver

EiceDRIVER™ Safe
1EDS - slew rate control IGBT driver IC
INN, INP and EN according to Figure 6. The desaturation status on terminal DESAT and the correct voltage at
terminal PADP are also monitored.
To save PCB space, the SIGI and SIGO terminals of a series of drivers can be interconnected via a daisy chain.
In this case, terminal SIGI of the first driver in the daisy chain should be connected to VCC1 or GND1. Terminal
SIGI of the next driver should be connected to terminal SIGO of the previous driver. Terminal SIGO of the last
driver in the daisy chain should be connected to the microcontroller.
The I/O signature check does not monitor the status of the IGBT.
Monitored status
 INN / INP and EN
 DESAT
 PADP undervoltage
The reference terminals are VCC1 and GND1.
EN
VPADP
VPADN
INN
INP
DESAT/CS*
A
1:FAIL
N
0:NO FAIL
D
VPADP
UVLO (<2,7V)
0:FAIL
1:NO FAIL
VPADN
AND
AND
SIGI
X
X
O
O
R
R
GND1
SIGO
Figure 6 I/O signature check
4.8.6
Two-level turn-off (TLTO)
The TLTO function is activated, if a capacitor is applied between terminal CZ and terminal VEE2. It affects any
turn-on and turn-off process, which is either initiated by the input signals INP, INN or EN or by any protection
function on the output side. Connecting terminal CZ with terminal VEE2 will deactivate the two-level turn-off
function.
The two-level turn-off introduces a second (lower) gate voltage level during the turn-off process according to
Figure 16This additional level ensures lower collector-emitter voltage overshoots during turn-off. The second
gate voltage level reduces the collector current of the IGBT when reaching this level. The obtained di_C/dt is
therefore slower and generates less induced overvoltage. The required timing, which can be adjusted by the
capacitance value at terminal CZ, depends on stray inductance and overcurrent at the beginning of the two-level
turn-off period.
Three voltage levels are available:
 The voltage level is set to 11.7 V, if terminal VZ is connected to VEE2,
 the voltage level is set to 10.6 V, if terminal VZ is floating,
 the voltage level is set to 9.5 V, if terminal VZ is connected to VEE2 via a 27 kΩ resistor
Target datasheet
IO_si
18
<Revision 0.73>, 05.06.2014