12ASX2 datasheet(77/147 Pages) INFINEON

77 / 147 page

EiceDRIVER

™ SIL

1EDI2002AS

Protection and Diagnostics

Datasheet

Rev. 3.1, 2015-07-30

Hardware Description

3.5.5

DESAT Supervision Level 3

The DESAT Supervision Level 3 functionality is summarized in Table 3-16:

The purpose of the DESAT Supervision Level 3 function is to verify that the DESAT feature is operational over the

whole life time of the application. Since the DESAT supervision is intrusive, it is intended to be executed when the

device is in Mode OPM5 and OPM6 (e.g. after power-up during the initialization phase). This mechanism aims at

generating artificially a DESAT error, verifying that it is recognized by the device and that an error notification is

correctly issued to the primary logic.

When this function is triggered, the driver enters a special mode where the signal input of the comparator is

internally pulled up above the threshold voltage (see Figure 3-1). When the device enters OPM6, independently

from the PWM signal, a DESAT error is generated, with the corresponding actions being triggered by the device.

The INP signal is not issued at the output stage.

Note: When using DESAT supervision Level 3, bit field SSTTOF.STVAL must be programmed to 0

3.5.6

OCP Supervision Level 1

The OCP Supervision functionality is summarized in Table 3-17:

The purpose of the OCP Supervision Level 1 function is to verify that the OCP feature is operational over the whole

life time of the application. Since the OCP supervision is intrusive, it is intended to be executed when the device

is in Mode OPM5 and OPM6 (e.g. after power-up during the initialization phase). The main goal of this mechanism

is to generate artificially an OCP error, to verify that it is recognized by the driver and that an error notification is

correctly issued to the primary logic.

When this function is triggered, the driver enters a special mode where here the signal input of both comparators

is internally pulled up above their respective threshold voltages (see Figure 3-4). The OCP function works

normally otherwise. When the device enters OPM6 and turns on, after the blanking time has elapsed, an OCP

error is generated, with the corresponding actions being triggered by the device.

The INP signal is issued at the output stage (weak turn-on).

Table 3-16 DESAT Supervision Level 3 Overview

Parameter

Short Description

Function

Supervision of the DESAT functionality.

Periodicity

On request.

Action in case of failure event

N.a.

Programmability

In-System Testability

Table 3-17 OCP Supervision Level 1 Overview

Parameter

Short Description

Function

Supervision of the OCP functionality.

Periodicity

On Request.

Action in case of failure event

N.a.

Programmability

In-System Testability

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