MAX25512B

Name: MAX25512B
Brand: Analog Devices
Availability: InStock

PRODUCTION

I²C-Controlled 4-Channel Low-Voltage 120mA LED Backlight Driver with Integrated Boost Converter

Data Sheet (Rev. 2) Product Selection Table

Part Models: 4
1ku List Price: price unavailable

Viewing:

Overview

Operates down to 3V on Battery Input after Startup
- Wide Boost Duty Cycle to Support Low Input Voltage
Boost or SEPIC Current-Mode DC-DC Controller
- 400kHz to 2.2MHz Operating Frequency Range
- Spread Spectrum Available
- Ability to Synchronize to an External Clock
LED Current Sinks
- Up to 120mA Output Current per String with Fine-Adjust DAC for brightness calibration
- Low OUT_ Regulation Voltage for Best Efficiency
- Optional Phase-Shifting of Outputs
I²C Control for Enhanced Flexibility

16667:1 Dimming Ratio at 200Hz
NTC Input for LED Current Foldback at HighTemperature
Hybrid Dimming Capable
Built-inProgrammable Automatic Fading Functionality
Detailed Diagnostic Using I²C and FLTB Output
- Shorted or Open LEDs
- Continuous Short-to-GND Monitoring
- Thermal Shutdown
- Output Undervoltage
Compact, 4mm x 4mm TQFN Package
AEC-Q100 Grade 1

Part Models: 4
1ku List Price: price unavailable

Documentation

Data Sheet 1

MAX25512B: I²C-Controlled 4-Channel Low- Voltage 120mA LED Backlight Driver with Integrated Boost Converter Converter (Rev.2) 08/08/2024

User Guide 1

MAX25512BEVKIT User Guide: Evaluates the MAX25512B (Rev.0) 08/08/2024

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
MAX25512BATGA/V+	24-TQFN-4X4X0.75	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX25512BATGA/V+T	24-TQFN-4X4X0.75	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX25512BATGA/VY+	LFCSP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX25512BATGA/VY+T	LFCSP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

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

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Tools & Simulations

SIMPLIS Models 1

MAX25512B SIMPLIS Schematic

Evaluation Kits

Evaluation Kit for the MAX25512B

Buy Now View Details

Features and Benefits

Demonstrates Robustness of MAX25512B
Wide 3V 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 Hybrid Dimming for Better EMI andAcoustic Performance and Higher Dimming Ratio
Demonstrates Fade in/out for Smooth Brightness Transition
Designed to Show Thermal Foldback Function
I²C Programmability
Dedicated GUI
Proven PCB and Thermal Design
Fully Assembled and Tested

Product Details

The MAX25512B evaluation kit (EV kit) demonstrates the MAX25512B integrated 4-channel, high-brightness LED (HB LED) driver with I²C interface for automotive displays.

The EV kit operates from a DC supply voltage between 3V 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 through I²C. The hybrid dimming feature can be enabled through a register bit to reduce EMI. The EV kit features a LED current foldback option either as a function of the temperature, by means of a NTC sensor (not provided), or through analog dimming. I²C-programmable automatic fading functionality is also available.

Finally, the EV kit demonstrates short-LED, open-LED, LED short-to-ground, boost output short-to-ground/ undervoltage and overvoltage, and overtemperature fault protection.

For operation at switching frequencies other than 2.2MHz or 400kHz, the external components should be chosen according to the calculations in the 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 controller. The EV kit also includes Windows^®-compatible software that provides a simple graphical user interface (GUI) for exercising the features of the IC.