Automotive High-Voltage, High-Brightness LED Controller

Single-Channel HB LED Drivers for Automotive Front-Light Applications such as High Beam, Low Beam, and Daytime Running Lights

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The MAX20090 is a single-channel high-brightness LED (HB LED) driver for automotive front-light applications such as high beam, low beam, daytime running lights (DRLs), turn indicators, fog lights, and other LED lights. It can take an input voltage from 5V to 65V and drive a string of LEDs with a maximum output voltage of 65V.

The device senses 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 1000:1, and the ICTRL input provides additional analog dimming capability in the controller. The device also includes a fault flag ( active-low FLT) that indicates open string, shorted string, and thermal shutdown. The device has built-in spread-spectrum modulation for improved electromagnetic-compatibility performance. The device can also be used in zeta and Cuk converter configurations, if necessary in some applications. The MAX20090 is available in a space-saving (4mm × 4mm), 20-pin TQFN, 20-pin side-wettable TQFN, or a 20-pin TSSOP package and is specified to operate over the -40°C to +125°C automotive temperature range.

Design Solution: Driver Monitoring Systems Need a New Breed of IR-LED Drivers ›

Design Solution: Flexible LED Controller Simplifies Automotive Exterior Lighting Design ›

MAX20090: Simplified Typical Operating Circuit MAX20090: Simplified Typical Operating Circuit Enlarge+

Key Features

  • High-Brightness LED Driver with a Wide Input Range Saves Space and Cost Through Integration
    • +5V to +65V Wide Input Voltage Range
    • +65V Maximum Boost Output Voltage
    • ICTRL Pin for Analog Dimming
    • Integrated High-Side Current-Sense Amplifier
    • 200Hz On-Board Ramp Simplifies PWM Dimming
  • Flexible Architecture Enables Easy Design Optimization
    • Configurable as Boost, High-Side Buck, SEPIC, Buck-Boost, Zeta, and Cuk
    • Programmable Switching Frequency (200kHz to 2.2MHz)
    • Spread-Spectrum Modulation to Reduce EMI Noise
  • Automotive Features and Robustness Improve System Reliability
    • Fault Diagnosis Through Fault Flag
    • Short Circuit, Overvoltage, and Thermal Protection
    • -40°C to +125°C Operating Temperature Range


  • 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 NumberRegulation TopologyMax. No. of LEDsLED ChannelsLED ConfigurationILED per Channel
PWM Dimming Freq.
Dimming RatioDimming ControlVCURR_SENSE
LED String Volt.
Oper. Freq.
maxmaxmaxminmaxmaxmaxSee Notes
MAX20090 Inductor Based151Series321000
$2.08 @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.

MAX20090EVKIT: Evaluation Kit for the MAX20090
MAX20090BEVKIT: Evaluation Kit for the MAX20090B
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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