Automotive Synchronous High Voltage LED Controller

Single-Channel Synchronous LED Controller for Automotive Exterior Lighting Applications

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The MAX25612 is a single-channel high-brightness LED (HB LED) driver 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 48V and can drive a string of LEDs with a maximum output voltage of 65V. The MAX25612 is fully synchronous and is suitable for boost and buck-boost applications that need synchronous rectification providing efficiencies greater than 90%.

The MAX25612 senses output current at the high side of the LED string. High-side current sensing is required to protect against 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, or buck-boost mode configurations. The PWM input provides LED dimming ratios of up to 5000:1, and the ICTRL input provides additional analog dimming capability in the MAX25612. The MAX25612 also includes a active-low FLT flag that indicates open string, shorted string, and thermal shutdown. The MAX25612 has built-in spread-spectrum modulation for improved electromagnetic compatibility performance. The MAX25612 is available in a space-saving (4mm x 4mm), 20-pin side-wettable TQFN or a 20-pin TSSOP package and is specified to operate overthe -40°C to +125°C automotive temperature range.

MAX25612: Functional Diagrams MAX25612: Functional Diagrams Enlarge+

Key Features

  • Integration Minimizes BOM and Cost
    • +5.0V to +48V Wide Input Voltage Range with a Maximum +65V Boost Output
    • Integrated pMOS Dimming FET Driver
    • ICTRL Input for Analog Dimming
    • Integrated High-Side Current-Sense Amplifier
    • 200Hz Ramp Generator Simplifies PWM Dimming
  • Simple to Optimize for Efficiency, Board Space, and Input Operating Range
    • Synchronous MOSFET Driver Improves Efficiencyby up to 5% for High-Current Boost, Buck-Boost, and High-Side Buck Applications
    • Programmable Switching Frequency (200kHz to 2.2MHz)
    • 20-Pin TSSOP Package with Exposed Pad and Thermally Enhanced 4mm x 4mm, 20-Pin Side-Wettable TQFN Packages
  • Protection Features Increase System Reliability
    • Short Circuit, Overvoltage and Thermal Protection
    • Fault Diagnosis through Fault Flag
  • Automotive Ready
    • -40°C to +125°C Operating Temperature Range
    • AEC-Q100 Qualified


  • Automotive Exterior Lighting:
  • Commercial, Industrial, and Architectural Lighting
  • Daytime Running Lights (DRLs)
  • Fog Light and Adaptive Front-Light Assemblies
  • High-Beam/Low-Beam/Signal/Position Lights
Part NumberRegulation TopologyMax. No. of LEDsLED ChannelsLED ConfigurationILED per Channel
PWM Dimming Freq.
Dimming RatioDimming ControlVCURR_SENSE
LED String Volt.
Oper. Freq.
maxmaxmaxminmaxmaxmaxSee Notes
MAX25612 NEW!Inductor Based151Series523000
Analog Controlled PWM
$2.37 @1k
See All LED Drivers (79)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX25612EVKIT: Evaluation Kit for the MAX25612

Quality and Environmental Data

Request Reliability Report for: MAX25612 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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  • Robust with Respect to EMC and Automotive Battery Transients
  • Spread-Spectrum Mode Reduces Emission at the Switching Frequency and its Harmonics
  • Phase-Shift Dimming of LED Strings

Automotive Synchronous High Voltage LED Controller

  • Integration Minimizes BOM and Cost
  • Simple to Optimize for Efficiency, Board Space, and Input Operating Range
  • Protection Features Increase System Reliability