12ASX2 datasheet(76/147 Pages) INFINEON

76 / 147 page

EiceDRIVER

™ SIL

1EDI2002AS

Protection and Diagnostics

Datasheet

Rev. 3.1, 2015-07-30

Hardware Description

3.5.3

DESAT Supervision Level 1

The DESAT Supervision Level 1 functionality is summarized in Table 3-14:

The purpose of the DESAT Supervision Level 1 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). The DESAT function works normally otherwise.

When the device enters OPM6 and turns on, after the blanking time has elapsed, a DESAT error is generated,

with the corresponding actions being triggered by the device.

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

3.5.4

DESAT Supervision Level 2

The DESAT Supervision Level 2 functionality is summarized in Table 3-15:

The purpose of the DESAT Supervision Level 2 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, as soon as the device is in OPM6 and a

PWM turn-on command is received, no action is executed on the output stage. However, the DESAT logic works

normally. It means that after the blanking time has elapsed, the voltage on pin DESAT should exceed the DESAT

threshold level, leading to a DESAT error, with the corresponding actions being triggered by the driver.

The INP signal is not issued at the output stage.

Table 3-14 DESAT Supervision Level 1 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 3-15 DESAT Supervision Level 2 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

12ASX2 Datasheet(PDF) 76 Page - Infineon Technologies AG

12ASX2 Datasheet(HTML) 76 Page - Infineon Technologies AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL