MAX25014

PRODUCTION

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

4-Channel 150mA I2C LED Driver with Low Operating Voltage

Data Sheet (Rev. 0)
Product Selection Table
Part Models
4
1ku List Price
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Part Details

  • 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 Diagnostic Features
    • LED-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
MAX25014
Automotive Low Input Voltage I2C 4-Channel 150mA Backlight Driver
MAX25014: Typical Application Circuit
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Documentation

Data Sheet 1

Design Note 1

Technical Articles 1

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Tools & Simulations

Software Development 1

Evaluation Kits

MAX25014EVKIT

Evaluation Kit for the MAX25014

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Features and Benefits

  • Demonstrates Robustness of MAX25014
  • 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 Details

The MAX25014 evaluation kit (EV kit) demonstrates the MAX25014, integrated 4-channel high-brightness LED driver with boost controller and I2C interface for automotive displays.

The EV kit operates from a DC supply voltage between 2.5V and 36V and the switching frequency can be either set at 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 short-LED, open-LED, Boost output Undervoltage and Overvoltage, and overtemperature-fault protection. LED current mea- surement 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 MAX25014 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
MAX25014EVKIT
Evaluation Kit for the MAX25014

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