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VND5E012MY-E Datasheet(PDF) 23 Page - STMicroelectronics

Part No. VND5E012MY-E
Description  Double channel high-side driver with analog current sense for automotive applications
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VND5E012MY-E Datasheet(HTML) 23 Page - STMicroelectronics

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VND5E012MY-E
Application information
35
3
Application information
Figure 29. Application schematic
Note:
Channel 2 has the same internal circuit as channel 1.
3.1
Load dump protection
Dld is necessary (Voltage Transient Suppressor) if the load dump peak voltage exceeds the
VCCPK max rating. The same applies if the device is subject to transients on the VCC line
that are greater than the ones shown in the ISO 7637-2: 2004(E) table.
3.2
MCU I/Os protection
When negative transients are present on the VCC line, the control pin is pulled negative to
approximately -1.5 V. ST suggests to insert a resistor (Rprot) in line to prevent the
microcontroller I/Os pins from latching-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.
Equation 1
Calculation example:
For VCCpeak = - 1.5 V; Ilatchup ≥ 20 mA; VOHμC ≥ 4.5 V
75
Ω ≤ Rprot ≤ 240 kΩ.
v
ccpeak llatchup
⁄
R
prot
V
OH
μC
V
IH
–
()
≤
l
IHmax
⁄
≤


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