Infineon XENSIV TLI4971 - Page 28

Application Note 28 of 31 Rev. 1.30
2022-03-01
Current Sensor TLI4971
Programming Guide and User Manual
IP-IP+
VDD
GND
VREF
AOUT
OCD1
OCD2
V
DD
6.8nF 6.8nF 1nF 1nF_50V
IP-IP+
VDD
GND
VREF
AOUT
OCD1
OCD2
V
DD
VDD VDD
6.8nF 6.8nF 1nF 1nF_50V
220nF
220nF
V
CC_IO
ADC
ADC
GND
GPIO
GPIO
µC
TLI4971
TLI4971
GPIO
V
CC_IO
V
CC_IO
Figure 23 Application Circuit for diagnosis mode, OCD2 are wired separately
OCD2
250 µs
OCD1
OCD Thr level
+V
te st
x 1.2
+V
te st
x 0.8
Regular Regular
Regular
Regular
V
AOUT
V
REF
+ (I
primary
x sensitivity) + V
te st
OTA and OCD
comp input
-V
te st
x 0.8
-V
te st
x 1.2
DM external
trigger
(I
primary
x sensitivity) + V
te st
(I
primar y
x sensitivity) - V
te st
V
REF
+ (I
primar y
x sensitivity) - V
te st
Figure 24 Diagnosis mode timing if 0A applied in the primary current path