VNQ500 STMicroelectronics, VNQ500 Datasheet - Page 14

• Manufacturer Part Number: VNQ500
• Description: Quad Channel High-side Driver
• Manufacturer: STMicroelectronics

Application information
3
3.1
3.1.1
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Application information
Figure 19. Application schematic
GND protection network against reverse battery
This section provides two solutions for implementing a ground protection network against
reverse battery.
Solution 1: a resistor in the ground line (R
This can be used with any type of load.
The following show how to dimension the R
1.
2.
where -I
maximum rating section of the device datasheet.
Power dissipation in R
This resistor can be shared amongst several different HSDs. Please note that the value of
this resistor should be calculated with formula (1) where I
maximum on-state currents of the different devices.
Please note that, if the microprocessor ground is not shared by the device ground, then the
R
values. This shift will vary depending on how many devices are ON in the case of several
high-side drivers sharing the same R
GND
R
R
P
will produce a shift (I
D
GND
GND
= (-V
+5V
GND
mC
≤ 600mV / (I
≥ (−V
CC
is the DC reverse ground pin current and can be found in the absolute
)
2
CC
Diagnostic
feedback
/R
R
R
R
prot
) / (-I
GND
prot
prot
GND
S(on)max
GND
S(on)max
(when V
)
CE
I/0n
Doc ID 9934 Rev 3
)
CC
* R
GND
<0 during reverse battery situations) is:
GND
.
) in the input thresholds and the status output
GND
V
GND
resistor:
R
GND
GND
GND
S(on)max
V
CC
only)
D
GND
OUTPUT
becomes the sum of the
VNQ500
D
ld