BTS721L1
Truth Table
Channel 1 and 2
Channel 3 and 4
(equivalent to channel 1 and 2)
Normal operation
Chip 1
Chip 2
IN1
IN3
IN2
IN4
OUT1
OUT3
OUT2
OUT4
ST1/2
ST3/4
BTS 721L1
H
H
H
H
H(L
14
))
H
L
H(L
14
))
H
L
15)
L
H
H(L
16
))
L
15)
H
H(L
16
))
H
L
L
H
L
H
L
H
Open load
Channel 1 (3)
Channel 2 (4)
Short circuit to Vbb
Channel 1 (3)
Channel 2 (4)
Overtemperature
both channel
Channel 1 (3)
Channel 2 (4)
Undervoltage/ Overvoltage
L
L
H
H
L
L
H
L
H
X
L
L
H
L
H
X
L
X
H
L
H
X
X
X
L
H
L
H
L
H
X
L
L
H
L
H
X
L
L
H
L
H
X
X
X
L
H
X
L
L
H
H
Z
Z
H
L
H
X
H
H
H
L
H
X
L
L
L
L
L
X
X
L
L
H
L
H
L
H
X
Z
Z
H
L
H
X
H
H
H
L
L
L
X
X
L
L
L
L = "Low" Level
H = "High" Level
X = don't care
Z = high impedance, potential depends on external circuit
Status signal valid after the time delay shown in the timing diagrams
Parallel switching of channel 1 and 2 (also channel 3 and 4) is easily possible by connecting the inputs and
outputs in parallel (see truth table). If switching channel 1 to 4 in parallel, the status outputs ST1/2 and ST3/4
have to be configured as a 'Wired OR' function with a single pull-up resistor.
Terms
V
Ibb
bb
Leadframe
I IN1
I IN2
I ST1/2
V
IN1 VIN2 VST1/2
3
5
4
IN1
IN2
Vbb
OUT1
PROFET
Chip 1
18
V
ON1
V
ON2
I L1
I IN4
I L2
V
OUT1
I
GND1/2
R
GND1/2
VOUT2
R
GND3/4
I ST3/4
V
IN3 VIN4 VST3/4
Leadframe
I IN3
7
9
8
IN3
IN4
Vbb
OUT3
PROFET
Chip 2
14
VON3
V
ON4
I L3
I L4
V
OUT3
IGND3/4
VOUT4
OUT2
17
OUT4
13
ST1/2 GND1/2
2
ST3/4 GND3/4
6
Leadframe (V
bb
) is connected to pin 1,10,11,12,15,16,19,20
External R
GND
optional; two resistors R
GND1/2
,R
GND3/4
= 150
Ω
or a single resistor R
GND
= 75
Ω
for
reverse battery protection up to the max. operating voltage.
14
)
15)
With additional external pull up resistor
An external short of output to V
bb
in the off state causes an internal current from output to ground. If R
GND
is
used, an offset voltage at the GND and ST pins will occur and the V
ST low
signal may be errorious.
16
) Low resistance to
V
may be detected by no-load-detection
bb
Semiconductor Group
7
INFINEON [ INFINEON TECHNOLOGIES AG ]
