Datasheet

14

Rev. 1.20

2022-04-27

TLE7258

LIN transceiver

Functional description

3.7

Overtemperature protection

The TLE7258 has an integrated overtemperature sensor to protect the device against thermal overstress on

the transmitter. In case of an overtemperature event, the transmitter will be disabled (see Figure 10). An

overtemperature event will not cause any mode change and will not be directly indicated on the RxD output

or the TxD input.

When the junction temperature falls below the thermal shut down level TJ < TJSD, the transmitter will be

reactivated. After an over-temperature recovery the TxD input requires a logical “high” signal before restarting

data transmission.

A 10°C hysteresis avoids toggling during the temperature shut down.

Figure 10 Overtemperature shut down

TLE7258_OVER_TEMPERATURE

TxD

t

t

BUS

t

Overtemperature event

Cool down

T

J

t

T

JSD (shutdown temp.)

Switch-on

Δ

T (shutdown hysteresis)

RxD