Datasheet

Data Sheet 9 Rev. 1.0, 2008-06-27
BTM7751G
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 BTM7751G” 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