 English |
|
|
|
|
|
|
|
| BTS550 Datasheet, PDF (9/15 Pages) Infineon Technologies AG – Smart Highside High Current Power Switch | |||
| |||
| ◁ |
VOUT(CL) = -19 V typ. via VZG. With DS, VOUT is
clamped to Vbb - VON(CL) via VZ1. Using DS gives
faster deenergizing of the inductive load, but higher
peak power dissipation in the PROFET. In case of a
floating ground with a potential higher than 19V
referring to the OUT â potential the device will
switch on, if diode DS is not used.
Overvoltage protection of logic part
+ Vbb
R IN
IN
V Z,IN
V
Z,IS
R bb
Logic
IS
PROFET
VOUT
R IS
RV
V Z,VIS
Signal GND
Rbb = 120 ⦠typ., VZ,IN = VZ,IS = 64 V typ., RIS = 1 kâ¦
nominal. Note that when overvoltage exceeds 69 V
typ. a voltage above 5V can occur between IS and
GND, if RV, VZ,VIS are not used.
Reverse battery protection
-Vbb
Rbb
IN
RIN
Logic
OUT
Power
Transistor
IS
DS
D
RIS
RV
Signal GND
RL
Power GND
RV ⥠1 kâ¦, RIS = 1 k⦠nominal. Add RIN for reverse
battery protection in applications with Vbb above
16
V18);
recommended
value:
1
RIN
+
1
RIS
+
1
RV
=
0.1A
1
0.1A
|Vbb| - 12V if DS is not used (or RIN = |Vbb| - 12V if
DS is 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 RIS and
RV.
Infineon Technologies AG
9
Data Sheet BTS550
Vbb disconnect with energized
inductive load
Provide a current path with load current capability
by using a diode, a Z-diode, or a varistor. (VZL < 72
V or VZb < 30 V if RIN=0). For higher clamp voltages
currents at IN and IS have to be limited to 250 mA.
Version a:
Vbb
V bb
IN
PROFET OUT
IS
VZL
Version b:
Vbb
VZb
Vbb
IN PROFET OUT
IS
Note that there is no reverse battery protection
when using a diode without additional Z-diode VZL,
VZb.
Version c: Sometimes a neccessary voltage clamp
is given by non inductive loads RL connected to the
same switch and eliminates the need of clamping
circuit:
Vbb
Vbb
RL
IN PROFET OUT
IS
2010-June-01
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese