Inductive and overvoltage output clamp
+ Vbb
VZ
VON
OUT
GND
PROFET
VON clamped to 67 V typ.
GND disconnect
BTS 308
IN
2
ST
4
Vbb VIN VST
3
Vbb
PROFET
OUT
5
GND
1 VGND
Overvolt. and reverse batt. protection
+ Vbb
Any kind of load. In case of Input=high is VOUT ≈ VIN - VIN(T+) .
Due to VGND >0, no VST = low signal available.
GND disconnect with GND pull up
V Z2
R IN IN R I
Logic
R ST ST
VZ1
PROFET
R GND
GND
Signal GND
VZ1 = 6.2 V typ., VZ2 = 70 V typ., RGND = 150 Ω,
RST= 15 kΩ, RI= 4 kΩ typ.
IN
2
ST
4
3
Vbb
PROFET
GND
1
OUT
5
Vbb
VIN VST
VGND
Any kind of load. If VGND > VIN - VIN(T+) device stays off
Due to VGND >0, no VST = low signal available.
Open-load detection
OFF-state diagnostic condition: VOUT > 3 V typ.; IN low
OFF
I L(OL)
Logic
unit
Open load
detection
V OUT
Vbb disconnect with charged inductive
load
3
high
IN
Vbb
2
ST
4
PROFET
GND
1
OUT
5
Vbb
Signal GND
Normal load current can be handled by the PROFET
itself.
Semiconductor Group
7