Open-load detection, OUT1...4
ON-state diagnostic condition:
VON < RON·IL(OL); IN high
+ Vbb
ON
Logic
unit
Open load
detection
VON
OUT
OFF-state diagnostic condition:
VOUT > 3 V typ.; IN low
BTS 710 L1
GND disconnect with GND pull up
(channel 1/2 or 3/4)
IN1
VIN1
IN2
VIN2
ST
Vbb
PROFET
OUT1
OUT2
GND
Vbb
VST
VGND
If VGND > VIN - VIN(T+) device stays off
Due to VGND > 0, no VST = low signal available.
OFF
Logic
unit
Open load
detection
REXT
V OUT
RO
Signal GND
GND disconnect
(channel 1/2 or 3/4)
Vbb
Ibb
IN1
Vbb
OUT1
IN2 PROFET
OUT2
ST
GND
VIN1VIN2
V
ST
V
GND
In case of IN = high is VOUT ≈ VIN - VIN(T+). Due to VGND > 0,
no VST = low signal available.
Semiconductor Group
9