1EDI2002AS_15 Datasheet, PDF (55/147 Pages) Infineon Technologies AG – Single Channel Isolated Driver for Inverter Systems AD Step

EiceDRIVER™ SIL
1EDI2002AS
Functional Description
Programming 0_H as a delay value disables the TTOFF for the concerned Turn-Off Sequence. Hard turn-off are
performed instead. In case the TTOFF function is wished, a minimum value for the delay has to be programmed
(see Page 119 and Page 120).
When safe two level turn-off is used (non zero delay) in normal operating mode (OPM4), the programmed safe
turn-off delay value shall be higher than the programmed regular two level turn off delay.
2.4.10.1.18 Configuration of the Safe TTOFF Plateau Level
The plateau level for safe two level turn off sequences can be programmed with bit field SSTTOF.GPS. The
plateau level value for safe turn-off sequences shall be lower than the one selected for regular turn-off sequences.
2.4.10.1.19 Configuration of the DESAT Blanking Time
The blanking time for the DESAT protection can be configured by writing bit field SDESAT.DSATBT. In case this
function is used, a minimum value for the delay has to be programmed (see Page 117).
Note: The programmed OCP blanking time shall be smaller than the programmed DESAT blanking time.
2.4.10.1.20 Configuration of the OCP Blanking Time
The blanking time for the OCP protection can be configured by writing bit field SOCP.OCPBT. Programming 0_H
deactivates the blanking time feature. The programmed blanking time shall not exceed a maximum value (see
Page 118).
Note: The programmed OCP blanking time shall be smaller than the programmed DESAT blanking time.
2.4.10.1.21 Configuration of DACLP Activation Time
The DACLP activation time after hard commutation can be programmed by writing bit field SACLT.AT. In case
value 0_H is programmed, the device delivers at DACLP a constant High level. In case an activation time is
required, a minimum value for the delay has to be programmed (see Page 123). In case value FF_H is programmed,
the device delivers a constant Low level at DACLP.
2.4.10.2 Dynamic Configuration
The TTOFF plateau level in regular turn-off can be modified during runtime by writing bit field PCTRL2.GPOF. The
value of this bit field is periodically transferred to the secondary side. The last valid received value by the primary
side is available at bit field PSTAT.GPOFS. The value currently used by the secondary chip is available at bit field
SCTRL.GPOFS.
The TTOFF plateau for safe turn-off can only be configured statically with bit field SSTTOF.GPS.
This dynamic configuration of the plateau level allows to compensate for temperature variations of the I-V
characteristic of the IGBT. In overcurrent conditions, the maximum current flowing through the IGBT when the
plateau is reached can be limited more accurately.
Similarly, The WTOand the TTON plateau level can be configured by writing bit field PCTRL.GPON.
The plateau value stored in the device at the beginning of the corresponding switching sequence is latched and
active until the next switching sequence.
Datasheet
55
Hardware Description
Rev. 3.1, 2015-07-30