MAX25024

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

4-Channel 150mA I2C LED Driver Supporting ASIL B


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Description

The MAX25024 is a 4-channel backlight driver IC with boost controller for automotive displays. The integrated current outputs can sink up to 150mA LED current each. The device accepts a wide 2.5V to 36V input voltage range and withstands 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.

Control is included for an external nMOSFET series switch to reduce quiescent current when the backlight is off and to disconnect the boost converter in the case of a fault.

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 available through the I2C interface to ease integration in systems requiring ASIL B compliance.

The MAX25024 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.

MAX25024: Typical Application Circuit MAX25024: Typical Application Circuit Enlarge+

Key Features

  • Wide Voltage-Range Operation
    • Operates Down to 2.5V Supply After Startup
    • Survives Load Dumps Up to 40V
  • 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
    • nMOS Input Protection Switch
  • Multiple Features for ASIL B Systems
    • LED-Current Measurement
    • Boost Input Current Measurement
    • Boost Output Voltage Measurement
    • LED Open/Short Detection and Protection
    • Boost Output Undervoltage and Overvoltage
  • Versatile Dimming Scheme Allows Hybrid or PWM-Only Dimming Using DIM Input or I2C
    • Dimming Ratio > 10,000:1 Using Hybrid Dimming
    • 10,000:1 Dimming Ratio at 200Hz Using PWM Dimming
  • Compact (4mm x 4mm) 24-Pin TQFN and SWTQFN Packages

Applications/Uses

  • Central Information Displays
  • Infotainment Displays
  • Instrument Clusters

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.

MAX25024EVKIT: Evaluation Kit for the MAX25024
Request Reliability Report for: MAX25024 
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


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