BTM7811K Datasheet, PDF (9/19 Pages) Infineon Technologies AG – TrilithIC

BTM7811K
4.7
Status Flag
The status flag outputs are open drain outputs with zener-diode which require a pull-up resistor, as shown in the
application circuit in Figure 5 “Application Example BTM7811K” on Page 16. Various errors as listed in the
table “Diagnosis” are reported by switching the open drain output ST to low.
Table 3 Truthtable and Diagnosis (valid only for the High-Side-Switches)
Flag
IH1 IH2 SH1 SH2 ST1 ST2 Remarks
Inputs
Outputs
0 0 L L 1 1 stand-by mode
Normal operation;
0 1 L H 1 1 switch2 active
identical with functional truth table 1 0 H L 1 1 switch1 active
1 1 H H 1 1 both switches active
Open load at high-side switch 1
Open load at high-side switch 2
0 XZX0
1 XHX1
X0 XZ1
X1 XH1
1 detected
1
0 detected
1
Overtemperature high-side switch1 0
1
XL
XL
X1
X0
1
1 detected
Overtemperature high-side switch2 X 0 X L 1 1
X 1 X L 1 0 detected
Overtemperature both high-side
switches
00LL1 1
0 1 L L 1 0 detected
1 0 L L 0 1 detected
1 1 L L 0 0 detected
Undervoltage
X X L L 1 1 not detected
Note: * multiple simultaneous errors are not shown in this table
Inputs:
0 = Logic LOW
1 = Logic HIGH
X = don’t care
–
Outputs:
Z = Output in tristate condition
L = Output in sink condition
H = Output in source condition
X = Voltage level undefined
Status:
1 = No error
0 = Error
–
–
Data Sheet
9
Rev. 1.0, 2008-05-15