Inductive and overvoltage output clamp
+ Vbb
VZ
V ON
GND
OUT
VON clamped to 58 V typ.
Overvolt. and reverse batt. protection
R IN
IN
R ST ST
VZ
R bb
+ Vbb
Logic
V OUT
GND
PROFET
R GND
Signal GND
Rbb = 120 Ω typ., VZ +Rbb*40 mA = 67 V typ., add
RGND, RIN, RST for extended protection
Open-load detection
ON-state diagnostic condition: VON < RON * IL(OL); IN
high
GND disconnect
BTS 442 D2
IN
2
ST
4
Vbb VIN VST
3
Vbb
PROFET
OUT
5
GND
1 VGND
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
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.
+ Vbb
ON
Logic
unit
Open load
detection
VON
OUT
Semiconductor Group
7