1EDI2002AS_15 Datasheet, PDF (69/147 Pages) Infineon Technologies AG – Single Channel Isolated Driver for Inverter Systems AD Step

3.4
Protection Functions: Category C
EiceDRIVER™ SIL
1EDI2002AS
Protection and Diagnostics
3.4.1 Shoot Through Protection function
The Shoot Through Protection (STP) functionality is summarized in Table 3-8:
Table 3-8 STP Overview
Parameter
Function
Periodicity
Action in case of failure event
Programmability
In-System Testability
Short Description
Prevents both High-Side and Low-Side Switches to be activated simultaneously.
Continuous.
1. The signal at pin INP is inhibited.
2. Error Flag PER.STPER is set.
Yes (dead time).
Yes.
With the implemented STP function, a low-side (resp. high-side) device is able to monitor the status of its high-
side (resp. low-side) counterpart. The input pin INSTP provides an input for the PWM signal of the driver’s
counterpart (Figure 3-6).
PWM_HS
PWM_LS
LOGIC
INP
INSTP
Driver HS
L
o
g
i
c
OUT
INP
INSTP
Driver LS
L
o
g
i
c
OUT
HS
LS
Figure 3-6 Shoot Through Protection: Principle of Operation
In case one of the driver is in ON state, the driver’s counterpart PWM input is inhibited, preventing it to turn-on
(See Chapter 2.4.3). A minimum dead time is defined by hardware. This dead time is programmable via bit field
PCFG2.STPDEL. Conceptually, the STP aims at providing an additional “line of defense” for the system in case
erroneous PWM commands are issued by the primary logic. In normal operation, dead time management shall be
performed at the microcontroller level.
In case a PWM ON command is received on pin INP during the inhibition time, a failure event is detected. In this
case, the high level at pin INP is ignored and bit PER.STPER is set.
Datasheet
69
Hardware Description
Rev. 3.1, 2015-07-30