BTS 5682E Infineon Technologies, BTS 5682E Datasheet - Page 32

• Manufacturer Part Number: BTS 5682E
• Manufacturer: Infineon Technologies

Specifications of BTS 5682E

• Packages: PG-DSO-36
• Channels: 6.0
• Channel Mix: 3x50mohm+2*130mohm+1*230mohm
• Led Mode: Yes
• Cranking Mode: Yes
• Pwm Engine Integrated: No

In case of over current as well as over temperature, the current sense signal of the affected channel is switched
off. To distinguish between over temperature and over load, the SPI diagnosis word can be used. Whereas the
over load flag is cleared every time the diagnosis is transmitted, the over temperature flag is cleared by a dedicated
SPI command (HWCR.CTL).
Details about timings between the current sense signal I
be found in
Figure 17
Current Sense Multiplexer
There is a current sense multiplexer implemented in the SPOC - BTS5682E 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
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
The switch bypass monitor compares the voltage V
by the current sense multiplexer (DCR.MUX) with threshold
register DCR.SBM.
Data Sheet
Figure
DCR.MUX
V
OUT
18.
IN
I
I
IS
L
Figure
CS
I
Timing of Current Sense Signal
Timing of Current Sense Multiplexer
Switch Bypass Diagnosis
IS
OFF
110
17.
V
ON
BB
000
in ON-state, the current will flow through the power transistor as well as through the short
V
t
ON
t
BB
s IS (ON)
, there is a switch bypass monitor implemented. In case of short circuit between the
t
sIS (E N)
001
DS
t
s IS (LC)
across the power transistor of that channel which is selected
32
IS
t
s IS (MUX )
and the output voltage V
V
DS(SB)
. The result of comparison can be read in SPI
V
BB
potential which means a small
t
dIS (OFF)
110
OFF
t
OFF
t
dIS (MUX )
OUT
and the load current I
SPOC - BTS5682E
Rev. 1.0, 2008-01-22
SenseTiming.emf
MuxTiming.emf
t
t
t
t
t
t
Diagnosis
V
DS
.
L
can