MAX16826
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MAX16826

Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection

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Programmable, Four-String LED Driver with Integrated ADC Optimizes Output Voltage and Detects LED Fault Conditions

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Part Details
Part Models 8
1ku List Price Starting From $4.18
Features
  • 4 Channels of Programmable, Fault-Protected, Constant-Current Source-Driver Controllers for All White, RGB, or RGB Plus Amber LED Configurations
    • Drives One to Four LED Strings
    • Individual PWM Dimming Inputs per String
    • Very Wide Dimming Range
  • Configurable as a boost or SEPIC Converter with Programmable 100kHz to 1MHz Switching Frequency for Design Flexibility
    • Integrated Boost/SEPIC Controller
    • External MOSFETs Allow Wide-Range LED Current with Multiple LEDs per String
    • 200kHz to 2MHz Programmable Switching Frequency for Optimizing Size vs. Efficiency
    • External Switching-Frequency Synchronization
  • I2C Allows the Current-Sink Drain Voltages to be Read to Minimize Power Dissipation and Detect LED String Fault Conditions
    • 7-Bit Internal ADC for LED Voltage Monitoring and Optimization
    • Dynamic Adjustment of LED String Currents and Output Voltage
    • Standby Mode
  • Protection Features Improve Reliability
    • LED Short and Open Detection
    • Overvoltage and Overtemperature Protection
Additional Details
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The MAX16826 high-brightness LED (HB LED) driver is designed for backlighting automotive LCD displays and other display applications such as industrial or desktop monitors and LCD televisions. The MAX16826 integrates a switching regulator controller, a 4-channel linear current sink driver, an analog-to-digital converter (ADC), and an I2C interface. The IC is designed to withstand automotive load dump transients up to 40V and can operate under cold crank conditions.

The MAX16826 contains a current-mode PWM switching regulator controller that regulates the output voltage to the LED array. The switching regulator section is configurable as a boost or SEPIC converter and its switching frequency is programmable from 100kHz to 1MHz.

The MAX16826 includes 4 channels of programmable, fault-protected, constant-current sink driver controllers that are able to drive all white, RGB, or RGB plus amber LED configurations. LED dimming control for each channel is implemented by direct PWM signals for each of the four linear current sinks. An internal ADC measures the drain voltage of the external driver transistors and the output of the switching regulator. These measurements are then made available through the I2C interface to an external microcontroller (µC) to enable output voltage optimization and fault monitoring of the LEDs.

The amplitude of the LED current in each linear current-sink channel and the switch-mode regulator output voltage is programmed using the I2C interface. Additional features include: cycle-by-cycle current limit, shorted LED string protection, and overtemperature protection. The MAX16826 is available in a thermally enhanced, 5mm x 5mm, 32-pin thin QFN package and is specified over the automotive -40°C to +125°C temperature range.

Applications

  • LCD Backlighting:
  • Automotive Infotainment Displays
  • Automotive Cluster Displays
  • Industrial and Desktop Monitors
  • LCD TVs
  • Automotive Lighting:
  • Adaptive Front Lighting
  • Low- and High-Beam Assemblies
Part Models 8
1ku List Price Starting From $4.18

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX16826ATJ+
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MAX16826ATJ+T
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MAX16826ATJ/V+
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MAX16826ATJ/V+T
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MAX16826BATJ+
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MAX16826BATJ+T
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MAX16826BATJ/V+
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MAX16826BATJ/V+T
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Filter by Model

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Product Lifecycle

PCN

Jun 20, 2016

- 1612

ASSEMBLY

MAX16826ATJ+

PRODUCTION

MAX16826ATJ+T

PRODUCTION

MAX16826BATJ+

PRODUCTION

MAX16826BATJ+T

PRODUCTION

Jun 18, 2021

- 2161

ASSEMBLY

MAX16826ATJ/V+

PRODUCTION

MAX16826ATJ/V+T

PRODUCTION

Mar 28, 2018

- 1721C-1

ASSEMBLY

MAX16826ATJ/V+

PRODUCTION

MAX16826ATJ/V+T

PRODUCTION

Jan 30, 2018

- 1721C

ASSEMBLY

MAX16826BATJ/V+

PRODUCTION

MAX16826BATJ/V+T

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jun 20, 2016

- 1612

arrow down

ASSEMBLY

MAX16826ATJ+

PRODUCTION

MAX16826ATJ+T

PRODUCTION

MAX16826BATJ+

PRODUCTION

MAX16826BATJ+T

PRODUCTION

Jun 18, 2021

- 2161

arrow down

ASSEMBLY

MAX16826ATJ/V+

PRODUCTION

MAX16826ATJ/V+T

PRODUCTION

Mar 28, 2018

- 1721C-1

arrow down

ASSEMBLY

MAX16826ATJ/V+

PRODUCTION

MAX16826ATJ/V+T

PRODUCTION

Jan 30, 2018

- 1721C

arrow down

ASSEMBLY

MAX16826BATJ/V+

PRODUCTION

MAX16826BATJ/V+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX16826EVKIT

Evaluation Kit for the MAX16826

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MAX16826EVKIT

Evaluation Kit for the MAX16826

Evaluation Kit for the MAX16826

Features and Benefits

  • Four Independently Controllable LED Strings
  • 7 LEDs Per String Configuration
  • Independently Programmable 50mA to 150mA String Current
  • 7.5V to 22V Input Voltage
  • Can Withstand Automotive Load Dump Up to 40V for 400ms
  • 0% to 100% DIM Duty Cycle Range
  • Shorted LED Protection and Detection
  • Open LED String Detection
  • Adaptive Boost-Stage Voltage Optimization
  • Convenient Breakaway LED Driver Board Easily Adaptable to End Application
  • Low Mechanical Profile
  • Windows 2000/XP/Vista (32-Bit)-Compatible Software
  • USB-PC Interface
  • USB-to-I²C On-Board Circuitry
  • Fully Assembled and Tested
  • Lead-Free and RoHS Compliant

Product Detail

The MAX16826 evaluation kit (EV kit) provides a proven design to evaluate the MAX16826, a four-string, I²C programmable high-brightness LED (HB LED) driver with PWM dimming control. The EV kit also includes Windows® 2000/XP/Vista®-compatible software that provides a simple graphical user interface (GUI) for exercising the features of the MAX16826. The MAX16826 EV kit PCB comes with a MAX16826ATJ+ installed. The EV kit is configured in a boost application.

This EV kit can be modified by changing component values on the board for other configurations (including RGB LED applications). Refer to the MAX16826 IC data sheet for more information.

Applications

  • LCD Backlighting
  • Automotive Infotainment Displays
  • Automotive Cluster Displays
  • Industrial and Desktop Monitors
  • LCD TVs
  • Automotive Lighting
  • Adaptive Front Lighting
  • Low- and High-Beam Assemblies

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