BTS721L1 Datasheet, PDF (2/15 Pages) Siemens Semiconductor Group – Smart Four Channel Highside Power Switch (Overload protection Current limitation Short-circuit protection Thermal shutdown)

Block diagram
Four Channels; Open Load detection in on state;
BTS721L1
3 IN1
5 IN2
4 ST1/2
ESD
Voltage
source
V _Logic
Voltage
sensor
Logic
Overvoltage
protection
Current
limit 1
Gate 1
protection
+ V _bb
Channel 1
Level shifter
Rectifier 1
Charge
pump 1
Charge
pump 2
Limit for
unclamped
ind. loads 1
Open load
Short to Vbb
detection 1
Temperature
sensor 1
Current
limit 2
Gate 2
protection
OUT1
Channel 2
2 GND1/2
Signal GND
Chip 1
Chip 1
Level shifter
Rectifier 2
Limit for
unclamped
ind. loads 2
Open load
Short to Vbb
detection 2
OUT2
Temperature
sensor 2
RO1
R _O2
GND1/2
+ V _bb
Channel 3
7 IN3
9 IN4
8 ST3/4
Logic and protection circuit of chip 2
(equivalent to chip 1)
OUT3
Channel 4
6 GND3/4
Signal GND
Chip 2
PROFET^
Chip 2
Leadframe connected to pin 1, 10, 11, 12, 15, 16, 19, 20
OUT4
RO3
R _O4
GND3/4
Leadframe
18
17
Load
Load GND
Leadframe
14
13
Load
Load GND
Semiconductor Group
2
2003-Oct-01