MAX25608AUI/V+ Analog Devices

EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX25608 Twelve Switch High Brightness LED Matrix Manager for Automotive Front Lights General Description Benefits and Features The MAX25608 12-switch matrix manager IC for automo- Automotive Ready: AEC-Q100 Qualified tive lighting applications includes a 12-switch array for by- Flexible Configuration passing individual LEDs in a single or dual string appli- Up to Twelve Switches in Series for Single String cation. It features twelve individually controlled n-channel Two Sub Strings of Six Series Switches per String MOSFET switches rated for 14V with an on-resistance Robust Serial Interface of 0.06. A single current source can be used to power Multi-Drop UART Communication Interface all the LEDs connected in series. Individual LEDs can be Up to 16 Addressable Devices dimmed by turning on and off the bypass switches across Compatible with CAN Physical Layer each LED. The device can also be configured in two string Optimal PWM Dimming Arrangement Provides applications with six switches in series per string. Each Excellent Dimming Performance switch can be connected across one, two, or three LEDs in Programmable 12-Bit PWM Dimming series. It also allows for parallel connection of two switch- Fade Transition Between PWM Dimming States es to bypass high-current LEDs. The IC also includes an Internal or External Clock for PWM Dimming internal charge pump that provides power for the gate dri- Programmable Slew Rate for EMI Control ve for the LED bypass switches. Protection Features and Package Improve Reliability The MAX25608 features a serial peripheral interface Open-LED Protection (UART) for serial communication. Each switch can be NTC Temperature Monitor turned fully on, fully off, or dimmed with or without fade Programmable Open and Short-LED Threshold transitions through the serial interface. The IC features Open and Shorted-LED Fault Reporting open-LED protection as well as open and short LED fault Thermally Enhanced 28-Pin TSSOP-EP reporting through the serial interface. The device is avail- able in a 28-pin TSSOP package with exposed pad. Ordering Information appears at end of data sheet. Applications Automotive Matrix LED Systems and Adaptive Drive Beam Lights. Simplified Block Diagram LED x 12LED x 12 LED VBAT DRIVER DR1 DR10 SRC1 DR12 DR11 MCU FLT MAX25608 RX RX CAN CAN TX TX XCVR XCVR CLKOUT CLKIN RADDR VDD CPP CPN RGRADE RTEMP IN VDD GND EP VBAT NTC 19-101169 Rev 0 8/21MAX25608 Twelve Switch High Brightness LED Matrix Manager for Automotive Front Lights TABLE OF CONTENTS General Description 1 Applications 1 Benefits and Features 1 Simplified Block Diagram . 1 Absolute Maximum Ratings 6 Package Information . 6 28-TSSOP 6 Electrical Characteristics . 7 Pin Configuration 9 MAX25608 9 Pin Description 10 Detailed Description 11 Power-On Reset and VDD UVLO . 11 Internal Switches 11 Programming Options 11 MAX25608 Pin Resistor Decode Table . 11 Resistor Programming Table . 11 PWM Dimming 12 PWM Clock and Synchronous Operation with Multiple Devices 13 Dimming With and Without Fade 13 RTEMP 15 Fault Pin Behaviour 15 LED Fault Detection and Protection 15 LED Open-Fault Detection and Protection 15 LED Short Detection . 15 Thermal Shutdown . 16 UART Serial Interface 16 Overview 16 Device Connections . 16 UART Frame Format . 16 Synchronization and Acknowledge Frames . 17 Device ID and Address frame format 18 Write Transactions 18 CRC Error Checking . 18 Register Map 19 MAX25608 . 19 Register Details . 22 Typical Application Circuits . 54 Typical Application Circuit . 54 www.maximintegrated.com Maxim Integrated 2