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VNQ7050AJ Datasheet(PDF) 26 Page - STMicroelectronics

Part # VNQ7050AJ
Description  Quad channel high-side driver with CurrentSense analog feedback
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VNQ7050AJ Datasheet(HTML) 26 Page - STMicroelectronics

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Application information
VNQ7050AJ
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
VCCpeak/Ilatchup
≤ Rprot ≤ (VOHµC - VIH - VGND) / IIHmax
Calculation example:
For VCCpeak = -150 V; Ilatchup
≥ 20 mA; VOHµC ≥ 4.5 V
7.5
kΩ ≤ Rprot ≤ 140 kΩ.
Recommended values: Rprot = 15
4.4
CS - analog current sense
Diagnostic information on device and load status are provided by an analog output pin (CS)
delivering the following signals:
Current monitor: current mirror of channel output current
Those signals are routed through an analog multiplexer which is configured and controlled
by means of SELx and SEn pins, according to the address map in MultiSense multiplexer
addressing Table.
Figure 34: CurrectSense and diagnostic – block diagram
SEL1
SEn
CS
RSENSE
RPROT
To uC ADC
OUT
Current
Sense
Fault
Fault
Diagnostic
VSENSEH
ISENSE
IOUT
K factor
CURRENT
MONITOR
Gate Driver
VCC – OUT
Clamp
T
VCC – GND
Clamp
Internal Supply
Undervoltage
shut-down
VON
Limitation
Current
Limitation
Power Limitation
Overtemperature
Short to VCC
Open-Load in OFF
SEL0
Control & Diagnostic
GND
INPUT
FaultRST
GAPGCFT00831
26/42
DocID027405 Rev 1


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