TLE8201R datasheet(12/45 Pages) INFINEON

12 / 45 page

TLE 8201R

Data Sheet Rev. 2.0

2006-06-07

4.2.2

Temperature Monitoring

Temperature sensors are integrated in the power stages. The temperature monitoring

circuit compares the measured temperature to the warning and shutdown thresholds. If

one or more temperature sensors reach the warning temperature, the temperature

warning bit TW is set to HIGH. This bit is not latched (i.e. if the temperature falls below

the warning threshold (with hysteresis), the TW bit is reset to LOW again).

If one or more temperature sensors reach the shut-down temperature, the outputs are

shut down as described in the next paragraph and the temperature shut-down bit TSD

is set to HIGH. The shutdown is latched (i.e. the output stages remain off and the TSD

bit set high until a SRR command is sent or a power-on reset is performed).

The power-stages are subdivided into two groups for over-temperature shut-down:

• Group1: OUT 1, OUT 2 and OUT 3

• Group2: OUT 4 to 11

If one or more temperature sensors within a group reaches the shutdown threshold, all

outputs within the group are switched off, while the other outputs continue normal

operation.

4.2.2.1

Characteristics Temperature Monitoring

Electrical Characteristics

8 V <

S < 20 V; 4.75 V < VCC < 5.25 V; INH = High; all outputs open;

-40

°C < T

j < 150 °C; unless otherwise specified

Pos. Parameter

Sym-

bol

Limit Values

Unit Conditions

min.

typ.

max.

4.2.7

Thermal warning junction

temperature1)

1) Not subject to production test, specified by design

120

145

170

°C–

4.2.8

Temperature warning

hysteresis1)

∆T

–30

–

4.2.9

Thermal shutdown junction

temperature1)

jSD

150

175

200

°C–

4.2.10 Thermal switch-on junction

temperature1)

jSO

120

–

170

°C–

4.2.11 Temperature shutdown

hysteresis1)

∆T

–30

–

4.2.12 Ratio of SD to W temperature1)

jSD /

1.05

1.20

–

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