VN5050J-E_07 STMICROELECTRONICS [STMicroelectronics], VN5050J-E_07 Datasheet - Page 21

• Manufacturer Part Number: VN5050J-E_07
• Description: Single channel high side driver for automotive applications
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

VN5050J-E
3.1.2
3.2
3.3
3.4
Solution 2: diode (D
A resistor (R
inductive load.
This small signal diode can be safely shared amongst several different HSDs. Also in this
case, the presence of the ground network will produce a shift (≈ 600mV) in the input
threshold and in the status output values if the microprocessor ground is not common to the
device ground. This shift will not vary if more than one HSD shares the same diode/resistor
network.
Load dump protection
D
V
that are greater than the ones shown in the ISO 7637-2: 2004(E) table.
MCU I/Os protection:
If a ground protection network is used and negative transient are present on the V
the control pins will be pulled negative. ST suggests to insert a resistor (R
prevent the µC I/Os pins to latch-up.
The value of these resistors is a compromise between the leakage current of µC and the
current required by the HSD I/Os (Input levels compatibility) with the latch-up limit of µC
I/Os.
-V
Calculation example:
For V
5kΩ ≤ R
Recommended values: R
Open load detection in off state
Off state open load detection requires an external pull-up resistor (R
OUTPUT pin and a positive supply voltage (V
microprocessor.
The external resistor has to be selected according to the following requirements:
1.
2.
Because I
up resistor R
standby.
CC
ld
CCpeak
is necessary (Voltage Transient Suppressor) if the load dump peak voltage exceeds the
max DC rating. The same applies if the device is subject to transients on the V
no false open load indication when load is connected: in this case we have to avoid
V
V
no misdetection when load is disconnected: in this case the V
V
CCpeak
OUT
OUT
OLmax
prot
/I
latchup
s(OFF)
=(V
to be higher than V
≤ 65kΩ .
= - 100V and I
; this results in the following condition R
GND
PU
PU
should be connected to a supply that is switched OFF when the module is in
/(R
may significantly increase if V
=1kΩ) should be inserted in parallel to D
≤ R
prot
L
+R
≤ (V
PU
prot
GND
))R
OH
latchup
µ
L
=10kΩ .
C
Olmin
<V
) in the ground line.
-V
Olmin
≥ 20mA; V
IH
; this results in the following condition
-V
GND
.
) / I
OH
IHmax
PU
out
µ
C
) like the +5V line used to supply the
≥ 4.5V
is pulled high (up to several mA), the pull-
PU
<(V
GND
PU
–V
if the device drives an
OLmax
OUT
Application information
PU
)/I
has to be higher than
) connected between
L(off2)
prot
.
) in line to
CC
CC
line,
line
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