MAX25024
Info: : PRODUCTION
searchIcon
cartIcon

MAX25024

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

Show More showmore-icon

4-Channel 150mA I2C LED Driver Supporting ASIL B

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $3.50
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
Additional Details
show more Icon

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.

Applications

  • Central Information Displays
  • Infotainment Displays
  • Instrument Clusters
Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). To request an NDA, click here.
Part Models 4
1ku List Price Starting From $3.50

close icon
Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX25024ATG/V+
  • HTML
  • HTML
MAX25024ATG/V+T
  • HTML
  • HTML
MAX25024ATG/VY+
  • HTML
  • HTML
MAX25024ATG/VY+T
  • HTML
  • HTML
Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX25024EVKIT

Evaluation Kit for the MAX25024

zoom

MAX25024EVKIT

Evaluation Kit for the MAX25024

Evaluation Kit for the MAX25024

Features and Benefits

  • Demonstrates Robustness of MAX25024
  • Wide 2.5V to 36V Input Operating Range (Up to 40V Load Dump)
  • Powers HB LEDs (Up to Four Strings) for Medium- to Large-Sized LCD Displays in Automotive and Display Backlight Applications
  • 400kHz to 2.2MHz Resistor-Programmable Switching Frequency with Spread-Spectrum Option
  • Phase-Shift Dimming Option
  • Demonstrates Cycle-by-Cycle Current Limit and Thermal-Shutdown Features
  • Demonstrates Wide Dimming Ratio
  • Demonstrates Fail-Safe Operation
  • I2C Programmability
  • Dedicated GUI
  • Proven PCB and Thermal Design
  • Fully Assembled and Tested

Product Detail

The MAX25024 evaluation kit (EV kit) demonstrates the MAX25024 integrated 4-channel, high-brightness LED driver with boost controller and I2C interface for automotive displays supporting ASIL-B.

The EV kit operates from a DC supply voltage between 2.5V and 36V, and the switching frequency can be set at either 2.2MHz or at 400kHz. The EV kit can only be configured to operate in I2C mode. Spread-spectrum mode (SSM) is enabled by default for EMI improvement, but it can be disabled by acting on a register bit. The EV kit demonstrates phase-shifted pulse-width-modulation (PWM) dimming. Dimming can be performed either externally using a PWM signal applied to the DIM PCB pad or internally by programming the desired dimming frequency and individual duty cycle via I2C. The hybrid dimming feature can also be enabled through a register bit to reduce EMI. The EV kit also demonstrates fault protection for short-LED, open-LED, boost-output undervoltage and overvoltage, and overtemperature. Additional ASIL-B features such as LED current measurement, boost-input current measurement and boost-output voltage measurement are also demonstrated.

For operation at switching frequencies other than 2.2MHz or 400kHz, the external components should be chosen according to the calculations in the MAX25024 IC data sheet.

The EV kit provides an I2C interface that can operate in conjunction with the MINIQUSB+* adapter board or a third-party I2C master. The EV kit also includes Windows® -compatible software that provides a simple graphical user interface (GUI) for exercising the features of the IC.

*Note: To be ordered separately.

Applications

  • Central Information Displays
  • Infotainment Displays
  • Instrument Clusters

Recently Viewed