Data Sheet

9

Rev. 1.0, 2007-05-21

BTM7741G

4.7

Status Flag

The status flag output is an open drain output with zener-diode which requires a pull-up resistor, as shown in the

application circuit in Figure 4 “Application Example BTM7741G” on Page 15. Various errors as listed in the

table “Diagnosis” are reported by switching the open drain output ST to low.

Table 3

Truth table 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

Open load at high-side switch 1

Open load at high-side switch 2

0

1

X

X

X

X

0

1

Z

H

X

X

X

X

Z

H

0

1

0

1

detected

detected

Overtemperature high-side switch1

0

1

X

X

L

L

X

X

1

0

detected

Overtemperature high-side switch2

X

X

0

1

X

X

L

L

1

0

detected

Overtemperature both high-side switches

0

X

1

0

1

X

L

L

L

L

L

L

1

0

0

detected

detected

Under voltage

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