Linear LED Drivers | NCV7694

Safety Controller for Infra-Red LED Illumination to Complement the Image Sensor for Automotive Applications

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The NCV7694 is a device which can drive a string of infra−red LEDs using an external mosfet. The IR LEDs are used to illuminate the surroundings of the image sensor. Since these LEDs can damage the end users’ eyes, the power feed to the LEDs needs to be turned off during a fault condition.
The NCV7694 driver features prevents the IR LEDs from being ON too long due to an inappropriate exposure time or being turned on too frequently using external resistors. The value of the RETL resistor defines the maximum TON time of the emitted light intensity and the value of the RFRL resistor defines the maximum frequency of the FLASH signal from the image sensor. A LED driver with hardware interlocks helps protect the users’ eyes in cases where the control signal has failed or a fault in the LED power path has occurred. LED brightness level is easily programmed using an external resistor in series with the mosfet transistor. The device can also detect Open Load, Short Circuit to GND and VS. Faults are reported to the DIAG pin, which can directly disable the DC/DC converter to prevent possible damage. The device is available in 10 pin DFN package.

  • In−Cabin Monitoring Sensor for DMS and OMS
  • Infrared Illumination for Automotive Cameras
  • Machine Vision Systems
  • Surveillance Systems

  • Automotive
  • Driver Monitoring System
  • Occupant Monitoring System

  • Safety Feature Prevent Being ON too long
  • Safety Feature Prevent Being ON too frequently
  • Constant Current Output for LED String Drive
  • FLASH Input Pin
  • Open LED Diagnostic Detection
  • Short LED to GND and VS Detection
  • External Resistor Defining max ON time
  • External Resistor Defining min OFF time
  • Protection against Short to Ground and Open of the External Resistors
  • Detection and Protection Against Under−Voltage and over Temperature
  • AEC−Q100 Qualified and PPAP Capable
  • ASIL−A safety design, ISO26262 compliant
  • 10 Pin Packaging with Wettable Flank for Enhanced Optical Inspection

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NCV7694MW0R2G

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Pb

A

H

P

DFNW-10

507AG

1

260

REEL

3000

Y

28

>1000

8

~NA~

$0.494

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Die Related Summary Data

Device: NCV7694MW0R2G

Equivalent to wafer fab process: I3T

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平均故障间隔时间/平均无故障时间（按小时计算）

FITS

I3T

4

4350769675

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Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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