Infineon TLE985x User Manual

TLE985x-Errata-100-Infineon

TLE985xQX(W) Family

Overview

This document lists the errata of the TLE985xQX(W) family. It is strongly recommended that the device behavior and possible proposed workarounds are considered for

the application.

Referenced documents

Table 1 Reference documents

Document type Document reference Issue date

Data Sheet See Table 2

User Manual Infineon-TLE985xQX-UserManual-v01_00-EN.pdf 2019-12-10

Aected products

Table 2 List of aected products

Device Reference datasheet Issue date

TLE9850QX Infineon-TLE9850QX-DataSheet-v01_00-EN.pdf 2019-07-26

TLE9851QXW Infineon-TLE9851QXW-DataSheet-v01_01-EN.pdf 2020-03-23

TLE9852QX Infineon-TLE9852QX-DataSheet-v01_00-EN.pdf 2019-07-26

TLE9853QX Infineon-TLE9853QX-DataSheet-v01_00-EN.pdf 2019-07-26

TLE9854QX Infineon-TLE9854QX-DataSheet-v01_00-EN.pdf 2019-07-26

TLE9854QXW Infineon-TLE9854QXW-DataSheet-v01_01-EN.pdf 2020-03-23

TLE9855QX Infineon-TLE9855QX-DS-DataSheet-v01_00-EN.pdf 2019-07-26

Errata sheet Please read the Important Notice and Warnings at the end of this document 1.0

www.infineon.com 2020-07-24

TLE985x-Errata-100-Infineon

TLE985xQX(W) Family

Table of contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1 Product errata . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.1 PLL loss of lock (0000052337-4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1.1 Workaround . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.1.1.1 Bypass of PLL and fixed system frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1.1.2 Optional: Use of recovery routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.1.2 Design improvement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2 Application hint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1 ADC1 (HV-Channel) sampling switch activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1.1 Workaround . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Errata sheet 2 1.0

2020-07-24

TLE985x-Errata-100-Infineon

TLE985xQX(W) Family

Product errata

1 Product errata

This chapter lists the errata of the referenced products and documentation.

1.1 PLL loss of lock (0000052337-4)

Behavior

The TLE985x provides a Phase-Locked-Loop (PLL) to generate the system frequency. Under certain conditions it may happen that the PLL issues a loss of lock. The probability for an erroneous PLL loss of lock to occur increases with higher temperature and longer operation times.

Eects

In case of a PLL loss of lock, the system frequency will be switched to free running clock divided by K2, this might have the following eects to the application:

• System timing do not match anymore, e.g. LIN communication might not work properly, PWM period might be aected.

• WDT1 reset may occur.

• Digital filter times might not match anymore.

1.1.1 Workaround

1.1.1.1 Bypass of PLL and fixed system frequency

As the source of the loss of lock detection is within the lock detection unit, a possible workaround is to bypass the PLL and use the internal oscillator (marked blue in Figure 1) as system frequency source only. This will lead to a fixed system frequency of 40 MHz.

Figure 1 Clock generation unit block diagram

Errata sheet 3 1.0

2020-07-24

+ 7 hidden pages