1EDS20I12SV Datasheet, PDF (16/33 Pages) Infineon Technologies AG – Single-channel isolated IGBT Driver

EiceDRIVER™ Safe
1EDS - slew rate control IGBT driver IC
VCC2
R_PRB1
PRB
R_PRB2
GND2
1EDS-SRC ^VEE2
VCC2
GND2
R_PRB1
PRB
R_PRB2
1EDS-SRC ^VEE2
Figure 5 External circuit for setting of preboost current (left: unipolar supply; right: bipolar supply)
The selected preboost current amplitude should charge the IGBT gate from the negative voltage VEE2 to a
value between 0 V and V_GE(th) of the IGBT within 135 ns. The corresponding IGBT gate charge curves should be
consulted for the various collector-emitter voltages V_CE for best accuracy.
4.6
Gate turn-off terminal OFF
The driver IC is able to sink a minimum gate current of 1.5A peak. The closed loop controlled sink MOSFET
establishes the two-level turn-off function according to section 4.8.6 by controlling the second level during the
turn-off process for an adjustable time period T_TLSET. An external turn-off boost transistor is recommended for
larger sink current capability.
4.7
Terminal EN
Terminal EN is used to enable the input side for normal operation. A soft turn-off is always initiated, when the
signal at terminal EN is logic low regardless of the status of signals at terminals INP and INN. The status of EN
is dominant over all communications over the insulation barrier. If therefore a shutdown is initiated via terminal
EN during normal operation and an overcurrent is detected simultaneously, the IGBT is turned off via soft turn-
off. However, /FLT is not activated as the chip is already being reset. /FLT will be activated after IC enable, if the
overcurrent still exists on the next IGBT turn-on command.
Signals on terminal EN have also priority over INN and INP. The signals at terminal EN must also pass a noise
filter. The EN signal is suppressed, if the pulse duration is shorter than the filter time.evaluated and the driver
reacts as described in Table 2.
Table 2
Driver IC status for EN, INP, and INN
EN
INP
INN
high
high
high
high
low
low
high
high 
low
high
high
low 
high 
high
low
* soft turn-off only in case of simultaneous CS / DESAT event
Result
regular turn-off / soft off*
regular turn-off / soft off*
turn-on
turn-on
turn-on without preboost
A second function of the EN terminal is to reset the driver IC after an overcurrent event, which was triggered by
the DESAT or CS function. The IC is reset by holding EN low for 800 ns or longer. The fault indication at
terminal /FLT follows on the next rising edge of signal EN
Target datasheet
16
<Revision 0.73>, 05.06.2014