Final Data Sheet

9

Rev. 1.0, 2009-02-04

TLE 8203E

Monitoring Functions

5

Monitoring Functions

5.1

Power Supply Monitoring

The power supply Voltage

V

•

Under Voltage

If the supply voltage

V

the power supply fail bit PSF is set. The error is not latched, i.e. if

V

voltage

V

•

Over Voltage

If the supply voltage

V

the power supply fail bit (bit 7 of the SPI diagnosis word) is set. The error is not latched, i.e. if

V

and reaches the switch on voltage

V

5.1.1

Characteristics Power Supply Monitoring

5.2

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).

If one or more temperature sensors reaches the shutdown threshold, all outputs are switched off.

Electrical Characteristics: Power Supply Monitoring

T

into pin (unless otherwise specified)

Pos.

Parameter

Symbol

Limit Values

Unit

Conditions

Min.

Typ.

Max.

5.1.1

UV-Switch-ON voltage

V

UVON

––

5.2

V

V

5.1.2

UV-Switch-OFF voltage

V

UVOFF

4.0

–

5.0

V

V

5.1.3

UV-ON/OFF-Hysteresis

V

UVHY

–0.25

–

V

V

5.1.4

OV-Switch-OFF voltage

V

OVOFF

21

–

25

V

V

5.1.5

OV-Switch-ON voltage

V

OVON

20

–

24

V

V

5.1.6

OV-ON/OFF-Hysteresis

V

OVHY

0.5

1

–

V

V