Automotive 16-Channel 100mA Local Dimming Backlight Driver with SPI Interface

16-Channel 100mA LED Local Dimming Driver Provides Full Diagnostics through SPI

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The MAX21610 is a 16-channel modular backlight driver for use with automotive displays. The integrated current outputs can sink up to 100mA LED current, each depending on the ambient temperature. Device power comes from an external 3.3V or 5V supply, while the LED current-sink outputs can operate at up to 17V.

A feedback output pin (FB) is provided to control an external DC-DC converter so that voltage headroom can be optimized and the overall system power dissipation reduced.

The global LED current for all strings is set through a serial peripheral interface (SPI), with individual PWM settings for each of the channels. The PWM frequency can be determined using the internal oscillator or by synchronizing to the external CLKIO input.

The device features a high-speed SPI interface for control. Up to 10 devices can be daisy-chained to reduce connection complexity.

The MAX21610 is available in a TQFN package and operates in the -40 to 125°C temperature range.

Key Features

  • High Integration
    • Complete 16-Channel Solution with Independent Dimming and Daisy-Chain Option
    • SPI Control for Minimum Parts Count
  • Robust and Low EMI
    • Programmable Spread Spectrum On Outputs
    • Slew-Rate Controlled Switching On LED Outputs
    • Programmable Phase Shift Between Outputs
  • Relative Dimming Ratio Between Strings Up to 32768:1
  • Latch Input (RST_LAT) for Synchronization to Video Frame
  • FB Output to Control External Power Supply for Minimum System Power Dissipation
  • 1% Accurate Output Current
  • Complete Diagnostics
    • LED Open/Short Detection and Protection
    • Power Supply Overvoltage Protection
    • Thermal Warning
    • Thermal Shutdown
  • Compact 32-Pin TQFN 5mm x 5mm Package


  • Central Information Displays
  • Infotainment Displays
  • Instrument Clusters

See parametric specs for LED Drivers (83)

Part NumberRegulation TopologyMax. No. of LEDsLED ChannelsVIN
MAX21610 Inductor Based41635.5

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.

MAX21610EVKIT: Evaluation Kit for the MAX21610

Technical Documents

Design Solution 7168 Back to Black with Backlight Local Dimming
Request Reliability Report for: MAX21610 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

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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Related Resources

Automotive Low Input Voltage I2C 4-Channel 150mA Backlight Driver

  • Wide Voltage-Range Operation
  • High Integration
  • Robust and Low EMI

Type ID Title
Design Solution 7168 Back to Black with Backlight Local Dimming