MAX25611B

PRODUCTION

Automotive High-Voltage, HB-LED Controller

Compact and Flexible LED Driver Controller for Automotive LED Lighting Applications

Data Sheet (Rev. 4) Product Selection Table

Part Models: 4
1ku List Price: Starting From $1.63

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Overview

Automotive Ready: AEC-Q100 Qualified
Integration Minimizes BOM for High-Brightness LED Driver
- Integrated pMOS Dimming FET Gate Driver Allows Single-Wire Connection to LED String
- PWM, Analog-to-PWM and Analog Dimming
- Integrated High-Side, Current-Sense Amplifier
- 12-Pin SWTQFN-EP Package
Flexible Application Configurations
- +5V to +36V Wide Input Voltage Range with a Maximum +65V Boost Output
- Boost, Buck-Boost, High-Side Buck, SEPIC, Zeta, and Cuk Single-Channel LED Drivers
Protection Features and Wide Temperature Range Increase System Reliability
- Short-Circuit, Overvoltage, and Thermal Protection
- -40°C to +125°C Operating Temperature Range

The MAX25611A/MAX25611B/MAX25611C/MAX25611D are single-channel HBLED drivers for automotive front light applications such as high beam, low beam, daytime running light (DRL), turn indicator, fog light, and other LED lights. It can take an input voltage from 5V to 36V and can drive a string of LEDs with a maximum output voltage of 65V.

The MAX25611A/B/C/D sense output current at the high side of the LED string. High-side current sensing is required to protect for shorts from the output to the ground or battery input. It is also the most flexible scheme for driving LEDs, allowing boost, high-side buck, SEPIC mode, or buck-boost mode configurations. The PWM input provides LED dimming ratios of up to 5000:1, and the REFI input provides additional analog dimming capability in the MAX25611A/B/C/D. The MAX25611A/B/C/D have built-in spread-spectrum modulation for improved electromagnetic compatibility performance. The MAX25611A/B/C/D can also be used in zeta and Cuk converter configurations if it is necessary in some applications.

The MAX25611A/B/C/D are available in a space-saving 12-pin SWTQFN-EP package. They are specified to operate over the -40°C to +125°C automotive temperature range. The switching frequency is internally set at 350kHzfor the MAX25611A/MAX25611C and 2.2MHz for theMAX25611B/MAX25611D.

Design Solution: Keep Your Head Up with a High-Dimming Ratio Automotive Led Driver ›

Applications

Automotive Exterior Lighting
Commercial, Industrial, and Architectural Lighting
Daytime Running Lights (DRLs)
Fog Lights and Adaptive Front Light Assemblies
Head-Up Displays
High Beam/Low Beam/Signal/Position lights

Part Models: 4
1ku List Price: Starting From $1.63

Documentation

Data Sheet 1

MAX25611A-MAX25611D: Automotive High-Voltage, HB-LED Controller Data Sheet (Rev.4) 10/16/2019

Technical Articles 1

Keep Your Head Up with a High-Dimming Ratio Automotive LED Driver 04/22/2019

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 Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX25611BATC/VY+	12-LFCSP_SS-4X4X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX25611BATC/VY+T	12-LFCSP_SS-4X4X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX25611BAUD/V+	14-TSSOP_4.4-4.4_MM	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX25611BAUD/V+T	14-TSSOP_4.4-4.4_MM	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
LED Drivers 1
MAX20090	PRODUCTION	Automotive High-Voltage, High-Brightness LED Controller

Evaluation Kits

Evaluation Kit for the MAX25611A/MAX25611B/MAX25611C/MAX25611D

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Features and Benefits

Configured for Boost and Buck-Boost Application
Analog Dimming Control
Proven PCB Layout
Fully Assembled and Tested Feature

Product Details

The MAX25611 evaluation kit (EV kit) provides a proven design to evaluate the MAX25611A/MAX25611B/MAX25611C/MAX25611D automotive high-voltage, high-brightness LED (HB LED) controller. The EV kit is set up for boost and buck-boost configurations and operates from a 6V to 18V DC supply voltage. The EV kit is configured to deliver up to 0.88A to one string of LEDs. The total voltage of the string can vary from 3V to 36V. The anode of the LED string should be connected to the LED+ terminal. The cathode of the LED string can be connected either to GND (boost mode) or IN (buck-boost mode). In the case of boost mode, the input voltage should not exceed the LED string voltage.