PEB3265 Infineon Technologies Corporation, PEB3265 Datasheet - Page 122

• Manufacturer Part Number: PEB3265
• Description: (PEB326x / PEB426x) Dual Channel Slicofi-2 / Slic Duslic
• Manufacturer: Infineon Technologies Corporation

Preliminary
4.8.2.8
The current offset error caused by the current sensor inside the SLIC-E/-E2/-P can be
compensated by programming the compensation registers OFR1 and OFR2
accordingly. The current offset error can be measured with the DC levelmeter. The
following settings are necessary to accomplish this:
• The DuSLIC has to be set into the HIRT mode by setting the bits HIR and HIT in
• The DC path for I
• The offset registers OFR1 and OFR2 must be set to 0000h.
• I
The current offset error can be eliminated by programming the offset registers OFR1 and
OFR2 according to the inverse value of the measured current offset error.
Example:
K
Short form:
OFR1 = OFFSET-H = 0xFF
OFR2 = OFFSET-L = 0xFA
Data Sheet
LM
OFFSET
OFFSET
I
off Err
INTDC
register BCR1 to 1.
In HIRT mode the line-drivers of the SLIC-E/-E2/-P are shut down and no resistors are
switched to the line. As a matter of fact, no current is present in that mode, but the
current sensor wrongly indicates a current flowing (current offset error).
SEL[3:0] bits in register LMCR2 to 0101 (see
example below).
Off-Err
Result
–
= 1, N
can be calculated like shown for "I
=
=
=
=
Current Offset Error Compensation
LM Result
LM
--------------------- -
–
–
Samples
32768
------------------------ -
79.66 mA
----------------------------------------------------------- -
N Samples
I
Value
Off Err
–
LM Value
= 256, LM
TRANS
=
----------------------------------------------------------- -
N Samples
--------------- -
32768
1541
32768
K INTDC
current levelmeter must be selected by setting the LM-
79.66 mA
Value
=
=
0.047
–
= 0x0605 = 1541
0.0146 mA
---------------------------- -
K INTDC
79.66 mA
122
TRANS
Table
=
: any other mode" in
0.047
32768
28).
79.66 mA
------------------------ -
256
–
6
Operational Description
=
1
0xFFFA
Table 31
=
0.0146 mA
2000-07-14
DuSLIC
(see also