1EDI2002AS_15 Datasheet, PDF (35/147 Pages) Infineon Technologies AG – Single Channel Isolated Driver for Inverter Systems AD Step

2.4.5.2 Definitions
EiceDRIVER™ SIL
1EDI2002AS
Functional Description
2.4.5.2.1 Events and State Transitions
The transitions from one state to the other are based on “events” and / or SPI commands. The following
classification is chosen for defining the events.
Events Class A
The following (exhaustive) list of events are defined as Events Class A:
• Occurrence of a DESAT event (leads to a safe turn-off sequence).
• Occurrence of an OCP event (leads to a safe turn-off sequence).
• Valid to Invalid transition on EN/FEN signal (leads to a regular turn-off sequence).
• Tristate event due to an Output Stage Monitoring event.
• Tristate event due to the activation of signal OSD.
When an Event Class A occurs, the output stage either initiates either a safe turn-off sequence (DESAT, OCP, or
a regular turn-off sequence (EN/FEN event) or goes in tristate (tristate event). The event is notified via an error bit
in the corresponding register.
Note: Contrarily to a reset event, an Event Class A does not affect the contents of the configuration registers.
When an Event Class A occurs, the device may change its operating mode depending on which mode is active
when the event occurs:
• If it was in OPM4, it goes in OPM3.
• If it was in OPM6, it goes in OPM5.
In all other cases, the OPM is unaffected. A state transition due to an Event Class A leads to the activation of signal
NFLTA. If no state transition occurs (if for example the device was not in OPM4 or OPM6), NFLTA is not activated
(exception: tristate event - see Chapter 2.4.7 for more details on failure notifications).
Events Class B
The following (exhaustive) list of events are defined as Events Class B:
• Occurrence of a UVLO2 event.
• Occurrence of a OVLO2 event.
• Occurrence of a UVLO3 event.
• Occurrence of a OVLO3 event (with bit SCFG2.OVLO3D set).
• Internal Supervision Error.
• Verification Mode Time Out Error
When an Event Class B occurs, the output stage initiates a regular turn-off sequence. The event is notified via an
error bit in the corresponding register and (possibly) via the signal NFLTB.
Note: Events Class B may affect the contents of the configuration registers.
When an Event Class B occurs, the device may change its operating mode depending on which mode is active
when the event occurs: if it was not in OPM1, it goes to OPM1. It is unaffected otherwise
A state transition due to an Event Class B leads to the activation of signal NFLTB. If no state transition occurs (if
for example the device was already in OPM1), NFLTB is not activated. See Chapter 2.4.7 for more details on
failure notifications.
Datasheet
35
Hardware Description
Rev. 3.1, 2015-07-30