BTS555E3146 Infineon Technologies, BTS555E3146 Datasheet - Page 9

• Manufacturer Part Number: BTS555E3146
• Manufacturer: Infineon Technologies

Reverse battery protection
R
battery protection in applications with V
16 V
|V
used).
To minimize power dissipation at reverse battery
operation, the summarized current into the IN and IS
pin should be about 120mA. The current can be
provided by using a small signal diode D in parallel to
the input switch, by using a MOSFET input switch or by
proper adjusting the current through R
V
load
Provide a current path with load current capability by
using a diode, a Z-diode, or a varistor. (V
V
currents at IN and IS have to be limited to 250 mA.
Version a:
Infineon Technologies AG
Zb
V
bb
bb
0.1A
| - 12V
< 30 V if R
19)
R
1 k
disconnect with energized inductive
V
IN
bb
; recommended value:
Signal GND
R
IN
if D
IS
D
IN
= 1 k
S
Logic
=0). For higher clamp voltages
is not used (or
R
D
IS
S
IN
nominal. Add R
IS
R
PROFET
V
V
IS
R
bb
1
R
IN
1
IN
+
R
=
R
bb
IN
1
|V
OUT
IS
IS
Power
Transistor
bb
for reverse
Power GND
bb
+
0.1A
V
and R
ZL
above
| - 12V
ZL
R
1
R
V
< 72 V or
L
=
OUT
V
-
V bb
.
if D
S
is
9
Version b:
Note that there is no reverse battery protection when
using a diode without additional Z-diode V
Version c: Sometimes a neccessary voltage clamp is
given by non inductive loads R
switch and eliminates the need of clamping circuit:
V
V
bb
bb
V
Zb
IN
IN
PROFET
V
IS
Data Sheet BTS555
bb
PROFET
L
V
IS
bb
connected to the same
OUT
OUT
2003-Oct-01
ZL
, V
Zb
R
L
.