1EDI2002AS_15 Datasheet, PDF (73/147 Pages) Infineon Technologies AG – Single Channel Isolated Driver for Inverter Systems AD Step

EiceDRIVER™ SIL
1EDI2002AS
Protection and Diagnostics
3.4.6 IGBT State Monitoring
The IGBT State Monitoring mechanism is summarized in Table 3-13:
Table 3-13 IGBT State Monitoring Overview
Parameter
Short Description
Function
Provides the result of the DESAT comparison logic to pin DOUT.
Periodicity
Continuous.
Action in case of failure event None.
Programmability
Yes (function can be disabled).
In-System Testability
Yes.
At every PWM command signal transition, once the DESAT blanking time is elapsed, the voltage measured at pin
DESAT is compared with the internal threshold and the result is forwarded to pin DOUT. That way, the primary
logic can compare the IGBT state (ON / OFF) with the issues PWM command. The current voltage on pin DOUT
is accessible via SPI by reading bit PPIN.DOUTL. Pin DOUT can be activated or deactivated (tristate) via bit
PCFG2.DOEN1. Besides, bit SCFG2.ISMEN need to be set as well.
In order to be functional, the DESAT clamping shall be disabled (bit SCFG.DSTCEN cleared).
Datasheet
73
Hardware Description
Rev. 3.1, 2015-07-30