BTS5481SF Infineon Technologies, BTS5481SF Datasheet - Page 36

• Manufacturer Part Number: BTS5481SF
• Manufacturer: Infineon Technologies

Specifications of BTS5481SF

• Packages: PG-DSO-36
• Channels: 4.0
• Channel Mix: 2*4,5mohm+2*11mohm
• Led Mode: Yes
• Cranking Mode: No
• Pwm Engine Integrated: No

8.2
There is a current sense signal available at pin IS which provides a current proportional to the load current of one
selected channel. The selection is done by a multiplexer which is configured via SPI.
Current Sense Signal
The current sense signal (ratio
ratio
of the ratio
recommended to use resistors 1.5 kΩ <
Figure 17
Figure 18
1) The curves show the behavior based on characterization data. The marked points are guaranteed in this Data Sheet in
2) The curves show the behavior based on characterization data. The marked points are guaranteed in this Data Sheet in
Data Sheet
Section 8.5
Section 8.5
k
ILIS
can be adjusted to the load type (LED or bulb) via SPI register HWCR for channel 2 and 3. The accuracy
k
Load Current Sense Diagnosis
Current Sense Ratio
Current Sense Ratio
ILIS
(Position 8.5.1).
(Position 8.5.1).
depends on the load current. Usually a resistor
k
ILIS
k
k
=
ILIS
ILIS
I
L
Channel 0, 1
Channel 2, 3
R
/
IS
I
S
< 5 kΩ. A typical value is 2.7 kΩ.
) is provided during on-state as long as no failure mode occurs. The
1)
2)
36
R
IS
is connected to the current sense pin. It is
SPOC - BTS5481SF
Rev. 1.0, 2011-11-17
Diagnosis