NCV7694中文资料Safety Controller for Infra-Red LED Illumination to Complement the Image Sensor for Automotive Applications数据手册ONSEMI规格书

描述 Description

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.

特性 Features

• Safety Feature Prevent Being ON too long
• Provides eye-safety functionallity
• Safety Feature Prevent Being ON too frequently
• Provides eye-safety functionallity
• 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

应用 Application

• 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

简介

NCV7694属于集成电路（IC）的专用IC。由制造生产的NCV7694专用 IC专用专用集成电路 (IC) 或芯片设计用于执行特定功能。这个类别包括可寻址开关、空芯仪表驱动器、音视频开关、验证芯片、自动放电、时钟发生器、彩色扫描仪，以及各种应用所用的其他许多集成电路。