BTS 7750 G

Data Sheet

6

2001-02-01

Status Flag

The status flag output is an open drain output with Zener-diode which requires a pull-up

resistor, c.f. the application circuit on page 14. Various errors as listed in the table

“Diagnosis” are detected by switching the open drain output ST to low. A open load

detection is not available. Freewheeling condition does not cause an error.

2

Truthtable and Diagnosis (valid only for the High-Side-Switches)

Flag

IH1

IH2

SH1

SH2

ST Remarks

Inputs

Outputs

Normal operation;

identical with functional truth table

0

0

1

1

0

1

0

1

L

L

H

H

L

H

L

H

1

1

1

1

stand-by mode

switch2 active

switch1 active

both switches

active

Overtemperature high-side switch1

0

1

X

X

L

L

X

X

1

0detected

Overtemperature high-side switch2

X

X

0

1

X

X

L

L

1

0detected

Overtemperature both high-side switches

0

X

1

0

1

X

L

L

L

L

L

L

1

0

0

detected

detected

Undervoltage

X

X

L

L

1

not detected

Inputs:

Outputs:

Status:

0 = Logic LOW

Z = Output in tristate condition

1 = No error

1 = Logic HIGH

L = Output in sink condition

0 = Error

X = don’t care

H = Output in source condition

X = Voltage level undefined