1EDI2001AS_15 Datasheet, PDF (37/135 Pages) Infineon Technologies AG – Single Channel Isolated Driver for Inverter Systems AD Step

• Invalid to Valid Transition on signal EN while Mode OPM3 active.
EiceDRIVER™ SIL
1EDI2001AS
Functional Description
Verification Mode (OPM5)
Verification Mode is the mode where intrusive verification functions can be started. When OPM5 is active, the
device is in disabled state.
The following exhaustive list of event bring the device in Verification Mode:
• Reception of a valid ENTER_VMODE command while Mode OPM2 active.
• Occurrence of an Event Class A while Mode OPM6 active.
After a transition from Mode OPM2 to OPM5, an internal watchdog timer is started. If after time t_VMTO, the device
has not left both modes OPM5 or OPM6, a time-out event occurs and an Event Class B is generated.
Weak Active Mode (OPM6)
Weak Active Mode is the mode where the device can be activated to run diagnosis tests at system level. When
OPM6 is active, the device is in Enabled State. A PWM turn-on command issues a Weak Turn-On on the
secondary side.
The following exhaustive list of event bring the device in Weak Active Mode:
• Invalid to Valid Transition on signal EN while Mode OPM5 active.
The watchdog counter started when entering Mode OPM5 is not reset when entering OPM6.
Implementation Notes related to State Transitions
• An Event Class A or Class B detected on the secondary side lead to an immediate reaction of the device’s
output stage. Due to the latency of the inter-chip communication, the notification on the primary side is slightly
delayed.
• The activation of signal NFLTA or NFLTB is simultaneous to the corresponding state transition on the primary
side.
• It is possible to change the operating mode while a failure condition is present. This may however lead to a
new immediate error notification and state transition.
2.4.5.4 Activating the device after reset
After a reset event, the device is in Mode OPM0 and disabled. In order to be active, the device needs to enter
Configuration Mode with the ENTER_CMODE command. Once all the configurations have been performed, the
Configuration Mode has to be exited with an EXIT_CMODE command. Once this is done, the device can enter
the Active Mode when Invalid to Valid transition on pin EN is detected.
2.4.5.5 Activating the device after an Event Class A or B
If during operation, an Event Class A occurs, the device enters the OPM3 (or OPM5). Bit field SSTAT.OPM is
updated accordingly. In order to reactivate the device, an invalid-to-valid transition has to be applied to signal EN.
It means that a Low-level and then a High level is applied to EN. If no Event Class A event is active, the device
will enter OPM4 (respectively OPM6).
If during operation, an Event Class B occurs, the device enters the Default Mode OPM1. Bit field SSTAT.OPM is
updated accordingly. In order to reactivate the device, the steps defined in Chapter 2.4.5.4 need to be performed.
Datasheet
37
Hardware Description
Rev. 3.1, 2015-07-30