MAX20444B

PRODUCTION

Automotive 4-Channel 130mA Backlight Driver with Boost/SEPIC Controller and I²C Interface

4-Channel 130mA LED Driver Provides Full Diagnostics and Hybrid Dimming thru I²C

Data Sheet (Rev. 8) Product Selection Table

Part Models: 4
1ku List Price: Starting From $3.12

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Part Details

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 > 10,000:1 Using Hybrid Dimming
- 10,000:1 Dimming Ratio at 200Hz using PWM Dimming
Complete Diagnostics
- LED Open/Short Detection and Protection
- Boost Output Undervoltage and Overvoltage
- Boost Voltage
- Individual String LED Current
- Thermal Shutdown
Compact (4mm x 4mm) 24-Pin TQFN and SWTQFN Packages

Part Models: 4
1ku List Price: Starting From $3.12

Documentation

Data Sheet 1

MAX20444B: Automotive 4-Channel 130mA Backlight Driver with Boost/SEPIC Controller and I²C Interface Data Sheet (Rev.8) 03/02/2022

Technical Articles 1

LED Driver for Automotive Display Applications 09/24/2021

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX20444BATG/V+	24-TQFN-4X4X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX20444BATG/V+T	24-TQFN-4X4X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX20444BATG/VY+	24-LFCSP_SS-4X4X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX20444BATG/VY+T	24-LFCSP_SS-4X4X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Tools & Simulations

LTspice 1

MAX20444B - LED Driver IC

Models for the following parts are available in LTspice:

MAX20444B

Software Development 1

MAX20444 EV Kit, 1.0.0

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

Evaluation Kit for the MAX20444B/MAX20444C

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Features and Benefits

Demonstrates Robustness of MAX20444B
Wide 4.5V to 36V Input Operating Range (Up to 52V 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 Failsafe Operation
I²C Programmability
Dedicated GUI
Proven PCB and Thermal Design
Fully Assembled and Tested

Product Details

The MAX20444B evaluation kit (EV kit) demonstrates the MAX20444B 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 4.5V and 36V, and the switching frequency can be set at either 2.2MHz or 400kHz. The EV kit can be configured to operate in stand-alone mode or in I²C mode. Spread-spectrum mode (SSM) for EMI improvement is enabled by default, but it can be disabled trough a register bit. The EV kit demonstrates phase-shifted pulse-width modulation (PWM) dimming, which 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 using 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.

For operation at switching frequencies other than 2.2MHz or 400kHz, the external components should be chosen according to the calculations in the MAX20444B 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.

Applications

Central Information Displays
Infotainment Displays
Instrument Clusters

Resources

MAX20444BEVKIT ODB Files - Design Files
4.03M

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