Datasheet

Application information VNQ5E160AK-E
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3 Application information
Figure 32. Application schematic
Note: Channel 2, 3, 4 have the same internal circuit as channel 1.
3.1 GND protection network against reverse battery
This section provides two solutions for implementing a ground protection network against
reverse battery.
3.1.1 Solution 1 : resistor in the ground line (R
GND
only)
This can be used with any type of load.
The following is an indication on how to dimension the R
GND
resistor.
1. R
GND
 600mV / (I
S(on)max
)
2. R
GND
V
CC
) / (-I
GND
)
where -I
GND
is the DC reverse ground pin current and can be found in the absolute
maximum rating section of the device datasheet.
Power dissipation in R
GND
(when V
CC
<0: during reverse battery situations) is:
Equation 1
P
D
= (-V
CC
)
2
/R
GND
V
CC
GND
OUTPUT
D
GND
R
GND
D
ld
 CU
+5V
V
GND
CS_DIS
INPUT
R
prot
R
prot
CURRENT SENSE
R
SENSE
R
prot
C
EXT