MAX25614C

Automotive IR LED/VCSEL Driver for Driver Monitoring Systems

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

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Overview

Features and Benefits
Product Details

Features and Benefits

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

Product Details

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.

Applications

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

Product Categories

Power Management
- Step-Up (Boost) LED Drivers

Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). To request an NDA, click here.

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Product Lifecycle Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

MAX25614DEVKIT

Evaluation Kit for the MAX25614C/MAX25614D

MAX25614DEVKIT

View Detailed Evaluation Kit Information

The MAX25614D evaluation kit (EV kit) provides a proven design to evaluate the MAX25614C/MAX25614D automotive infrared LED drivers. The EV kit operates from a 5V to 18V DC supply voltage.

The EV kit is configured to deliver up to 5A to a string of LEDs. The total voltage of the string can vary from 0 to 32V. The high current driver uses fixed-frequency average current mode control. The LEDs may be connected by using the on-board IR LEDs or using onboard external connection pads. The anode of the LED string should be connected to the LED1+ terminal. The cathode of the LED string should be connected to LED-. The LED current, input current, and boost voltage are all controlled through the analog inputs VSET and ICTRL. The strobe signal can be applied to the PWM input to set the IR emitter pulse duration and frequency. A fault flag is provided on the FLTB test point, indicating fault conditions such as LED short to ground or LED open.

APPLICATIONS

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

NDA PROCESS

To apply for the NDA, fill out the request form and agree to the Terms and Conditions.
Applying for an NDA does not necessarily guarantee approval or shipment of any device or software.
NDA is subject to approval by the Customer Service Team and will notify applicants accordingly.
If the NDA is approved, customers will need to register for a MyAnalog account (for existing account holders, please log in with your details) in order to access the zip file under the Software Development section (note that this will appear only for approved MyAnalog accounts).

Features & Benefits

Boost/Buck Maxim Proprietary Control Architecture
Integrated Protections for Eye Safety, PWM Pulse Width Timer, and LED Current Monitor
Onboard IR Emitter Load

Product Recommendations

MAX25614C Companion Parts

Recommended Related Parts

MAX25614A, MAX25614B.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number	Material Declaration	Reliability Data	Pin/Package Drawing	CAD Symbols, Footprints & 3D Models
MAX25614CATI/VY+	Material Declaration	Reliability Data	28-LFCSP_SS-5X5X0.75	Ultra Librarian SamacSys
MAX25614CATI/VY+T	Material Declaration	Reliability Data	28-LFCSP_SS-5X5X0.75	Ultra Librarian SamacSys
Wafer Fabrication Data

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.