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VND5E050ACKTR-E Datasheet(PDF) 26 Page - STMicroelectronics

Part # VND5E050ACKTR-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

VND5E050ACKTR-E Datasheet(HTML) 26 Page - STMicroelectronics

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VND5E050ACJ-E, VND5E050ACK-E
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Doc ID 022515 Rev 2
characteristics Table 9: Current sense (8 V < VCC <18V)).
Diagnostic flag in fault conditions, delivering a fixed voltage VSENSEH up to a
maximum current ISENSEH in case of the following fault conditions (refer to
Table 11: Truth table):
Power limitation activation
Overtemperature
Short to VCC in off-state
Open-load in off-state with additional external components.
A logic level high on the CS_DIS pin simultaneously sets all the current sense pins of the
device in a high impedance state, thus disabling the current monitoring and diagnostic
detection. This feature allows multiplexing of the microcontroller analog inputs by sharing
the sense resistance and ADC line among different devices.
Figure 33.
Current sense and diagnostic
3.4.1
Short to VCC and off-state open-load detection
Short to VCC
A short circuit between VCC and output is indicated by the relevant current sense pin set to
VSENSEH during the device off-state. Little or no current is delivered by the current sense
during the on-state depending on the nature of the short circuit.
Off-state open-load with external circuitry
Detection of an open-load in off mode requires an external pull-up resistor (RPU) connecting
the output to a positive supply voltage (VPU).
Main MOSn
41V
OUTn
ILoff2r
RSENSE
RPROT
To uC ADC
RPD
RPU
VPU
Pwr_Lim
VSENSE
PU_CMD
Overtemperature
OL OFF
+
-
VOL
CURRENT
SENSEn
IOUT/KX
ISENSEH
VBAT
ILoff2f
VSENSEH
Load
INPUTn
VCC
GND
CS_DIS


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