MAX16814

PRODUCTION

Integrated, 4-Channel, High-Brightness LED Driver with High-Voltage DC-DC Controller

Multistring Driver Provides Highest Efficiency and Complete Fault Protection with the Lowest External Component Count

Data Sheet (Rev. 11) Product Selection Table
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Overview

  • Cost-Effective 4-Channel Linear LED Current Sinks for Wide Range of LED Lighting Applications
    • Drives One to Four LED Strings
    • 4.75V to 40V Input Voltage Range
    • Full-Scale LED Current Adjustable from 20mA to 150mA
    • 5000:1 PWM Dimming at 200Hz
    • Less than 40µA Shutdown Current
  • Minimal Component Count Saves Cost and Space
    • Internal MOSFET for Each Channel
    • Internal Current-Mode Switching DC-DC Controller Supporting Boost, Coupled-Inductor Boost-Buck,or SEPIC Topologies
    • 200kHz to 2MHz Programmable Switching Frequency for Optimizing Size vs. Efficiency
    • External Switching-Frequency Synchronization
  • Protection Features and Wide Operating Temperature Range Improves Reliability
    • Open-Drain Fault-Indicator Output
    • Open-LED and LED-Short Detection and Protection
    • Overtemperature Protection
    • Available in Thermally Enhanced 20-Pin TQFN, QFND, and TSSOP Packages
    • Operation Over -40°C to +125°C Temperature Range
MAX16814
Integrated, 4-Channel, High-Brightness LED Driver with High-Voltage DC-DC Controller
MAX16814: Typical Operating Circuit
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Documentation

Data Sheet 1

Technical Articles 3

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
LED Drivers 2
MAX16838
PRODUCTION Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Controller
MAX16826
PRODUCTION Programmable, Four-String HB LED Driver with Output-Voltage Optimization and Fault Detection
MOSFET & Gate Drivers 1
MAX15054
PRODUCTION High-Side MOSFET Driver for HB LED Drivers and DC-DC Applications
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Tools & Simulations

SPICE Model 1

Evaluation Kits

MAX16814EVKIT

Evaluation Kit for the MAX16814

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Features and Benefits

  • Input Voltage from 6.5V Up to HB LED Forward Voltage
  • Demonstrates OVP (33V)
  • HB LED String Output Currents Configurable for 100mA or 150mA
  • Demonstrates UVLO (5V)
  • Demonstrates Open and Short LED Fault Protection and Detection
  • Demonstrates Cycle-by-Cycle Current Limit and Thermal-Shutdown Features
  • Demonstrates Adaptive Voltage Optimization
  • Proven PCB and Thermal Design
  • Fully Assembled and Tested

Product Details

The MAX16814 evaluation kit (EV kit) demonstrates the MAX16814 high-brightness LED (HB LED) driver, integrating a step-up DC-DC preregulator followed by 4 channels of linear current sinks. The step-up preregulator switches at 350kHz and operates as a current-mode-controlled regulator capable of providing up to 600mA for the linear circuits. Each of the 4 linear channels can operate up to 40V and provide up to 150mA per channel. The 4 channels are configurable for 100mA or 150mA HB LED output current. The IC is a 20-pin TSSOP package with an exposed pad for enhanced thermal power dissipation.

The EV kit operates from a DC supply voltage of 6.5V up to the HB LED string forward voltage. The EV kit can withstand a 40V load-dump condition. The EV kit also demonstrates the IC features such as adaptive voltage optimization, undervoltage lockout (UVLO), overvoltage protection (OVP), cycle-by-cycle current limit, thermal shutdown, and digital PWM dimming operation using a digital PWM input signal to control the brightness of the HB LEDs. The EV kit also demonstrates a reference IC design for automotive applications.

Applications

  • Architectural, Industrial, and Ambient Lighting
  • Automotive Displays LED Backlights
  • Automotive RCL, DRL, Front Position, and Fog Lights
  • LCD TV and Desktop Display LED Backlights
MAX16814EVKIT
Evaluation Kit for the MAX16814

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