BTS 5590G Infineon Technologies, BTS 5590G Datasheet - Page 29

• Manufacturer Part Number: BTS 5590G
• Manufacturer: Infineon Technologies

Specifications of BTS 5590G

• Packages: PG-DSO-36
• Channels: 5.0
• Channel Mix: 2*25mohm+1*40mohm+2*100mohm
• Led Mode: Yes
• Cranking Mode: No
• Pwm Engine Integrated: No

Figure 17
Current Sense Multiplexer
There is a current sense multiplexer implemented in the SPOC - BTS5590G that routes the sense current of the
selected channel to the diagnosis pin IS. The channel is selected via SPI register DCR.MUX. The sense current
also can be disabled by SPI register DCR.MUX. For details on timing of the current sense multiplexer, please refer
to
Figure 18
8.3
To detect short circuit to
output pin OUT and V
circuit (bypass) with undefined ratio. As a result, the current sense signal will show lower values than expected by
the load current. In OFF-state, the output voltage will stay close to V
The switch bypass monitor compares the voltage V
by the current sense multiplexer (DCR.MUX) with threshold V
register HWCR.SBM. The switch bypass monitor is active in ON- as well as in OFF-state.
Data Sheet
Figure
18.
Timing of Current Sense Signal
Timing of Current Sense Multiplexer
Switch Bypass Diagnosis
DCR.MUX
V
OUT
IN
I
BB
I
IS
L
CS
I
IS
in ON-state, the current will flow through the power transistor as well as through the short
OFF
111
V
DD
, there is a switch bypass monitor implemented. In case of short circuit between the
ON
000
t
ON
t
s IS (ON)
t
sIS (E N)
001
DS
t
sIS (LC)
across the power transistor of that channel which is selected
29
t
s IS (MUX )
DS(SB)
. The result of comparison can be read in SPI
BB
t
dIS (OFF)
111
OFF
potential which means a small V
t
OFF
t
dIS (MUX )
SenseTiming.emf
MuxTiming.emf
t
t
t
t
SPOC - BTS5590G
t
t
Rev. 1.3, 2007-10-30
Diagnosis
DS
.