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Automotive IR LED/VCSEL Driver for Driver Monitoring Systems

Automotive Infrared LED/VCSEL Driver Simplifies Design for Automotive Driver and Occupant Monitoring Systems

产品详情

主要特征

Parametric specs for LED Drivers
VIN (V) (min) 4.5
VIN (V) (max) 36
Max. No. of LEDs 8
# LED Channels 1
Regulation Topology Inductor Based
LED Configuration Series
ILED per Channel (A) (max) 10
PWM Dimming Freq. (kHz) (max) 1
Dimming Ratio (max) 1000
Dimming Control Analog
PWM
VCURR_SENSE (mV) 200
POUT (W) 100
ICC (mA) (max) 7
LED String Volt. (V) (max) 35
Switching Frequency (kHz) 420
Package/Pins TQFN-CU/28
Budgetary
Price (See Notes)
4.37
缩小

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Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

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参量

Parametric specs for LED Drivers
VIN (V) (min) 4.5
VIN (V) (max) 36
Max. No. of LEDs 8
# LED Channels 1
Regulation Topology Inductor Based
LED Configuration Series
ILED per Channel (A) (max) 10
PWM Dimming Freq. (kHz) (max) 1
Dimming Ratio (max) 1000
Dimming Control Analog
PWM
VCURR_SENSE (mV) 200
POUT (W) 100
ICC (mA) (max) 7
LED String Volt. (V) (max) 35
Switching Frequency (kHz) 420
Package/Pins TQFN-CU/28
Budgetary
Price (See Notes)
4.37

主要特征

  • Integration Minimizes BOM and PCB Area
    • Boost/Buck ​Maxim-Proprietary Architecture
    • Integrated 0.168Ω Switching nFET
    • Integrated pFET with Inrush Current Limit
    • Analog Control Inputs
  • Comprehensive Fault Protection
    • Boost Undervoltage/Overvoltage Protection
    • LED Current Monitoring 
    • LED Ground Short and Overcurrent Protection
    • LEDN Short-to-Battery Protection
    • LED Open Protection
    • pFET Timeout
    • Thermal Warning and Shutdown
  • EMI Mitigation
    • Spread-Spectrum Frequency Modulation
  • Automotive Ready
    • -40°C to +125°C Operating Temperature Range
    • AEC-Q100 Grade 1 Qualified

应用/用途

  • Automotive Driver Monitoring System (DMS)
  • Automotive Occupant Monitoring System (OMS)
  • Night Vision
  • Optical Inspection/Machine Vision

描述

The MAX25614 is a high-current IR LED/VCSEL driver for automotive driver monitoring systems (DMS). The MAX25614 features a Maxim-proprietary architecture that implements both a boost DC-DC and a buck LED driver using a single power stage. The IC can drive IR LED/VCSEL strings of up to 35V from a 4.5V to 36V input supply. The MAX25614 can drive up to 10A peak current to the IR emitter. The MAX25614 is designed for applications where the IR emitter is pulsed on and off, typically at 60Hz or the shutter speed of the corresponding image sensor. The MAX25614C/MAX25614D use fixed-frequency average current-mode control with programmable switching frequency options of 420kHz and 2.1MHz. Both an inrush current-limiting pFET and a low-side switching nFET are integrated.

The MAX25614C/MAX25614D incorporate analog control to set the LED current, boost current, and boost voltage. I2C-controlled variants are available as well, and are described in the MAX25614A/MAX25614B data sheet. A dedicated current-monitoring circuit is integrated to provide instantaneous and/or average LED current information to the microcontroller. The MAX25614 has an open-drain fault output that asserts low in case of open-LED, LED overcurrent, excessive LED on-time, LEDN short-to-battery, boost UV/OV, pFET timeout, or thermal warning/shutdown fault conditions.

The MAX25614 is available in a 28-pin, side-wettable TQFN package with exposed pad and is specified for operation over the -40°C +125°C automotive temperature range.

简化框图

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心

采样:
选择上方“样片”按钮将重定向至第三方ADI样片网站。登录后,所选部件将转移到您在此网站上的购物车。如果您之前从未使用过此网站,请创建一个新帐户。有关此样片网站的任何问题,请联系SampleSupport@analog.com