Datasheet

PROFET
®
BTS 443 P
Data Sheet Page 7 of 15 Rev. 1.0, 2007-02
Input circuit (ESD protection)
IN
ZD
IN
I
V
bb
R
bb
V
Z,IN
V
bIN
V
IN
ESD-Zener diode: 68 V typ., max 15 mA;
Current sense output
Normal operation
IS
IS
R
ZD
IS
V
V
bb
Z,IS
V
R
bb
I
IS
I
IS,fault
V
Z,IS
= 68 V (typ.), R
IS
= 1 kΩ nominal (or 1 kΩ /n, if n
devices are connected in parallel). I
S
= I
L
/k
ilis
can be
only driven by the internal circuit as long as
V
out
- V
IS
> 5V. If you want to measure load currents
up to I
L(M)
, R
IS
should be less than
ilisML
bb
KI
VV
/
5
)(
−
.
Note: For large values of R
IS
the voltage V
IS
can reach
almost V
bb
. See also overvoltage protection.
If you don't use the current sense output in your
application, you can leave it open.
Inductive and overvoltage output clamp
+ V
bb
OUT
PROFET
V
Z1
V
ON
V
ON
is clamped to V
ON(Cl)
= 42 V typ.
Overvoltage protection of logic part
+ V
bb
V
OUT
IN
bb
R
Signal GND
Logic
PROFET
V
Z,IS
R
IS
IN
R
IS
V
Z,IN
R
V
V
Z,VIS
R
bb
= 200 Ω typ., V
Z,IN
= V
Z,IS
= 68 V typ., R
IS
= 1 kΩ
nominal. Note that when overvoltage exceeds 73 V typ.
a voltage above 5V can occur between IS and GND, if
R
V
, V
Z,VIS
are not used.