Overview

Features and Benefits

  • Wide-Voltage-Range Operation
    • Operates Down to 4V Supply After Startup
    • Survives Load Dump Up to 52V
  • High Integration
    • Complete 4-Channel Solution Including Boost Controller
    • I2C Control for Minimum Parts Count
  • Robust and Low EMI
    • Spread-Spectrum Oscillator
    • Phase Shifting
    • 400kHz to 2.2MHz Switching-Frequency Range
    • Fail-Safe Operation Mode Using the FSEN Pin
  • Versatile Dimming Scheme Allows Hybrid or PWM-Only Dimming Using DIM Input or I2C
    • Dimming Ratio > 10000:1 Using Hybrid Dimming
    • 10000:1 Dimming Ratio at 200Hz Using PWM Dimming
  • Complete Diagnostics
    • LED Open/Short Detection and Protection
    • Boost Output Undervoltage and Overvoltage
    • Boost-Voltage Measurement
    • LED-Current Measurement
    • Thermal Shutdown
  • Compact (4mm x 4mm) 24-Pin TQFN and SWTQFN Packages

Product Details

The MAX20444C is a 4-channel backlight driver IC with boost controller for automotive displays. The integrated current outputs can sink up to 130mA LED current each. The device accepts a wide 4.5V to 36V input voltage range and withstands direct automotive load-dump events.

The internal current-mode switching DC-DC controller supports boost or SEPIC topologies and operates in the 400kHz to 2.2MHz frequency range. Integrated spread spectrum helps reduce EMI. An adaptive output-voltage-control scheme minimizes power dissipation in the LED current-sink paths.

The device features I2C-controlled pulse-width-modulation (PWM) dimming and hybrid dimming. In either case, the minimum pulse width is 500ns. Phase-shifted dimming of the strings is incorporated for lower EMI.

Comprehensive diagnostic information is also available through the I2C interface, while stand-alone operation is also supported.

The MAX20444C is available in a 24-pin TQFN or 24-pin side-wettable TQFN (SWTQFN) package and operates over the -40°C to +125°C temperature range.

Applications

  • Central Information Displays
  • Infotainment Displays
  • Instrument Clusters

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

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Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.