Smart High-Side Power Switch
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
Open load
Channel 1 (3)
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
H
H
H
H
H(L
15
))
H
L
H(L
15
))
H
L
L
16)
H
H(L
17
))
L
16)
H
H(L
17
))
H
L
L
H
L
H
L
H
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 = "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
9
,EE
EE
, ,1
, ,1
, 67
9
,1 9,1 967
/HDGIUDPH
,1
,1
9EE
287
352)(7
&KLS
287
9
21
9
21
, /
, /
9
287
,
*1'
9287
/HDGIUDPH
, ,1
, ,1
, 67
9
,1 9,1 967
,1
,1
9EE
287
352)(7
&KLS
287
921
9
21
, /
, /
9
287
,
*1'
9287
67 *1'
5
*1'
67 *1'
5
*1'
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.
15
)
With additional external pull up resistor
16)
An external short of output to V in the off state causes an internal current from output to ground. If R
bb
GND
is
used, an offset voltage at the GND and ST pins will occur and the V
ST low
signal may be errorious.
17
) Low resistance to
V
may be detected by no-load-detection
bb
Data Sheet
8
Rev. 1.3, 2010-03-16
INFINEON [ INFINEON TECHNOLOGIES AG ]
