TLE8201R datasheet(11/45 Pages) INFINEON

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TLE 8201R

Data Sheet Rev. 2.0

2006-06-07

4.2

Monitoring Functions

4.2.1

Power Supply Monitoring

The power supply Voltage

S is monitored for over- and under voltage.

• Under Voltage

If the supply voltage

S drops below the switch off voltage VUV OFF, all output

transistors are switched off and the power supply fail bit PSF is set. The error is not

latched, i.e. if

S rises again and reaches the switch on voltage VUV ON, the power

stages are restarted and the error bit is reset.

• Over Voltage

If the supply voltage

S rises above the switch off voltage VOV OFF, all output

transistors are switched off and the power supply fail bit (bit 7 of the SPI diagnosis

word) is set. The error is not latched, i.e. if

S falls again and reaches the switch on

voltage

OV ON, the power stages are restarted and the error is reset.

4.2.1.1

Characteristics Power Supply 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.

4.2.1

UV-Switch-ON voltage

UVON

––

5.2

S increasing

4.2.2

UV-Switch-OFF voltage

UVOFF

4.0

–

5.0

S decreasing

4.2.3

UV-ON/OFF-Hysteresis

UVHY

–0.25

–

UVON - VUVOFF

4.2.4

OV-Switch-OFF voltage

OVOF

–

S increasing

4.2.5

OV-Switch-ON voltage

OVON

–

S decreasing

4.2.6

OV-ON/OFF-Hysteresis

OVHY

0.5

1–V

OVOFF -

OVON

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