MAX25616

PRODUCTION

High-Current VCSEL/IR Driver with HV Buck and Diagnostics for Automotive Driver Monitoring Systems

Data Sheet (Rev. 1) Product Selection Table
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Overview

  • Automotive Ready
    • AEC-Q100 Grade 1 and ASIL B Compliant
    • -40°C to +125°C Operating Temperature Range
  • Integration Minimizes BOM and PCB Area
    • Integrated Low-RDSON Power Switches for VCSEL/IR Driver: 17.5mΩ for LS and 30mΩ for HS
    • Integrated Switches for the Step-down Converter
    • Space-Saving, 5mm x 5mm FC2QFN Package
    • I2C Programming and Monitoring
  • Comprehensive Fault Protection
    • VCSEL/IR VMAX and VMIN Monitoring
    • VCSEL/IR Overcurrent Protection (IMAX) and Current Monitoring for Eye Safety
    • PWM Duration Protection
    • VCSEL/IR Temperature Monitoring
    • Step-down Converter Undervoltage/Overvoltage Protection
    • Thermal Warning and Thermal Shutdown
  • EMI Mitigation
    • Spread-Spectrum Frequency Option
    • Low-Inductance FC2QFN Package

The MAX25616 is a highly integrated IC that includes a high-current VCSEL/IR driver, high-voltage DC-DC step-down converter, and I2C digital interface, providing a compact solution for automotive driver monitoring systems.

The high-current VCSEL/IR driver features an Analog Devices-proprietary driver that is designed to operate from 4V to 36V and provide peak currents up to 10A. The output voltage of the step-down converter is set at 3.3V (factory-adjustable from 2.8V to 5.2V in 50mV increments) and can provide up to 3A current.

The device features an I2C serial interface for communication with an external microcontroller. The I2C interface programming options include: VCSEL/IR current, VCSEL/IR maximum on-time, and switching frequency of the VCSEL/IR driver. Additionally, the device provides fault and diagnostic information through the I2C interface. An integrated 8-bit ADC converts the VCSEL/IR voltage and VCSEL/IR instantaneous current. By connecting a resistor-divider with an NTC to the AIN1/AIN2 input, the VCSEL/IR temperature can be sensed and read through the I2C interface.

The device is available in a 28-pin, 5mm x 5mm FC2QFN package and is specified for -40°C to +125°C operation.

APPLICATIONS

  • Automotive Driver Monitoring Systems
  • ADAS Camera Systems
MAX25616
High-Current VCSEL/IR Driver with HV Buck and Diagnostics for Automotive Driver Monitoring Systems
MAX25616 Simplified Application Diagram
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Documentation

Data Sheet 1

User Guide 1

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Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA).

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Tools & Simulations

SIMPLIS Models 1

Evaluation Kits

eval board
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MAX25616EVKIT

Evaluates: MAX25616A/MAX25616B/MAX25616C/MAX25616D

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Features and Benefits

  • Proprietary Power Architecture Achieves up to 10A IR/VCSEL Drive with <500mA Input Current
    • High-Efficiency 4-Switch Buck-Boost with Integrated MOSFETs
    • Buck Voltage Regulator Capable of Sourcing up to 1.5A
  • Included MAX32625PICO Board and GUI
  • On-Board IR VCSEL Load with Resistive Interlock and Photodiode Functional Safety Features

Product Details

The MAX25616 evaluation kit (EV kit) demonstrates the performance and features of the MAX25616 automotive VCSEL/IR driver targeting driver monitoring and cabin monitoring systems. The EV kit comes fully assembled and includes the MAX32625PICO for communicating between a PC and the I2C interface of the MAX25616.

Windows®-based graphical-user interface (GUI) software is available for use with the EV kit.
MAX25616EVKIT
Evaluates: MAX25616A/MAX25616B/MAX25616C/MAX25616D
MAX25616EVKIT Board Photo Angle View MAX25616EVKIT Board Photo Top View MAX25616EVKIT Board Photo Bottom View

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