vnq5e250ajtr-e STMicroelectronics, vnq5e250ajtr-e Datasheet - Page 25

• Manufacturer Part Number: vnq5e250ajtr-e
• Description: Quad Channel High-side Driver With Analog Current Sense For Automotive Applications
• Manufacturer: STMicroelectronics

VNQ5E250AJ-E
3.1.2
3.2
3.3
If the calculated power dissipation leads to a large resistor or several devices have to share
the same resistor then ST suggests to utilize Solution 2 (see below).
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 produces 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 not varies 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 transients are present on the V
the control pins are pulled negative. ST suggests to insert a resistor (R
the microcontroller I/O pins to latch-up.
The value of these resistors is a compromise between the leakage current of microcontroller
and the current required by the HSD I/Os (Input levels compatibility) with the latch-up limit of
microcontroller I/Os.
-V
Calculation example:
For V
5kΩ ≤ R
Recommended values: R
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
CCpeak
prot
/I
latchup
= - 100V and I
≤ 180kΩ.
GND
=1kΩ) should be inserted in parallel to D
≤ R
prot
≤ (V
prot
GND
latchup
OHμC
=10kΩ, C
Doc ID 17360 Rev 2
) in the ground line
-V
≥ 20mA; V
IH
-V
EXT
GND
=10nF
) / I
OHμC
IHmax
.
≥ 4.5V
GND
if the device drives an
Application information
prot
) in line to prevent
CC
CC
line,
line
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