Infineon XENSIV TLI4971 - In-Circuit Programming

Application Note 4 of 31 Rev. 1.30
2022-03-01
Current Sensor TLI4971
Programming Guide and User Manual
1.2 In-circuit programming
To program the EEPROM the digital interface sends a particular programming sequence and applies the
programming voltage at pin OCD2. In a multiple sensor system the OCD2 can be connected together as each
sensor will receive their individual data set via the separated A
OUT
pin connection. The programming voltage can
be applied to all sensors in parallel. Please find a detailed programming example in the chapter 3.
AOUT OCD2
VDD
GND
VDC_Link
PGND
VAREF
V
Sens
A/D
A/D
A/D
A/D
EN
VCC_IO
6
Gate-
Driver
µC
Load
VREF
OCD1
VCC_IO
IP+ IP-
VCC_IO
220nF
4k7
1nF/50V
TLI4971
A/D
A/D
4k7
1nF/50V
D in
VAREF
PWM
AGND
AGND
D in
6.8nF/50V 6.8nF/50V 6.8nF/50V 6.8nF/50V 6.8nF/50V6.8nF/50V
R1
R2
C1
C2
C3 C4 C5 C6
C7
C8
C9
PGM Connector
VCC
R
VCCIO
VCCIO
VPROG
VPROG
R
OCD2
LDO
IN
OUT
C10
Programmer
SICI
Digital IF Generate
V
PROG
Supply
Control
V
Sens
VS
Tracker
IN
OUT
VS
adj
V
Sens
D out
4k7R3
Figure 2 External Programmer connected to GPD application circuit (TLI4971 in-circuit-programming)
The recommended serial resistors R
OCD2
and R
VCCIO
are used to avoid a current feedback into the supply and to
avoid possible high floating of the µC supply. The resistors R
OCD2
and R
VCCIO
have to be determined as described
in following formula.
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