1EDI2002AS_15 Datasheet, PDF (59/147 Pages) Infineon Technologies AG – Single Channel Isolated Driver for Inverter Systems AD Step

EiceDRIVER™ SIL
1EDI2002AS
Protection and Diagnostics
Table 3-1 Safety Related Functions (cont’d)
Protection Feature Description
Internal Clock
Supervision
DIO Supervision
TTOFF
Plausibility check of the frequency of the internal
oscillator.
Supervision of the DIO channel
Two Level Turn-Off
Cate- Comments
gory
D See Chapter 3.5.9
D See Chapter 3.5.10
E See Chapter 2.4.6
SPI Communication SPI Communication (using register PRW).
E
See Chapter 4.1
Overvoltage robustness Robustness against transient overvoltage on power E
supply.
See Chapter 5.2
From the conceptual point of view, the protection functions can be clustered into five main categories.
• Category A corresponds to the functions where the device “decides on its own”, after the detection of an Event
Class A, to change the state of the output stage and to disable itself. A dedicated action from the user is needed
to reactivate the device (fast reactivation).
• Category B corresponds to the functions where the device “decides on its own”, after the detection of an Event
Class B, to change the state of the output stage and to disable itself. A complete reinitialization from the user
is needed to reactivate the device (slow reactivation).
• Category C corresponds to the functions that only issue a notification in case an error is detected.
• Category D are intrusive supervision functions, aimed at being started when the application is not running.
• Category E corresponds to implemented functions or capabilities supported by the device whose use can
enhance the overall safety coverage of the application.
Datasheet
59
Hardware Description
Rev. 3.1, 2015-07-30