1EDI2002AS_15 Datasheet, PDF (58/147 Pages) Infineon Technologies AG – Single Channel Isolated Driver for Inverter Systems AD Step

EiceDRIVER™ SIL
1EDI2002AS
Protection and Diagnostics
3
Protection and Diagnostics
This section can describes the safety relevant functions implemented in the 1EDI2002AS.
3.1
Supervision Overview
The 1EDI2002AS driver provides extended supervision functions, in order to achieve ASIL requirements on
system level. Table 3-1 gives an overview of the implemented functions.
Table 3-1 Safety Related Functions
Protection Feature Description
Cate- Comments
gory
DESAT
Monitoring of the collector-emitter voltage of the IGBT A
in ON state.
See Chapter 3.2.1
OCP
Monitoring of the current on the IGBT’s auxiliary emitter A
path.
See Chapter 3.2.2
External Enable
Fast deactivation via an external Enable signal on the A
primary.
See Chapter 3.2.3
Output Stage
Monitoring
Monitoring of TON and TOFF signals.
A
See Chapter 3.2.4
Power Supply
Monitoring
Internal Supervision
Under Voltage Lock-Out function on V_CC1, V_CC2 and B
V_EE2; Over Voltage Lock-Out on V_EE2 and V_CC2.
Monitoring of the key internal functions of the chip. B
See Chapter 3.3.1
See Chapter 3.3.2
STP
Shoot Through Protection.
C See Chapter 3.4.1
Gate Monitoring
Monitoring of the GATE voltage during a switching C See Chapter 3.4.2
sequence.
Temperature
Monitoring
Over temperature warning for the driver.
C See Chapter 3.4.3
SPI Error Detection SPI Error Detection.
C See Chapter 3.4.4
Active Short Circuit
Support
IGBT State Monitoring
V_CC2 not valid error notification
C
The current state of the IGBT is given by signal DOUT. C
See Chapter 3.4.5
See Chapter 3.4.6
WTO
Weak Turn-On Functionality
D See Chapter 3.5.2
DESAT Supervision
Supervision of the DESAT function during application D
life time.
See Chapter 3.5.3,
Chapter 3.5.4 and
Chapter 3.5.5
OCP Supervision
Supervision of the OCP function during application life C & D See Chapter 3.5.6,
time.
Chapter 3.5.7 and
Chapter 3.2.2
Power Supply
Supervision of the OVLO / UVLO function during
Monitoring Supervision application life time.
D See Chapter 3.5.8
Datasheet
58
Hardware Description
Rev. 3.1, 2015-07-30