MAX8790

NOT RECOMMENDED FOR NEW DESIGNS

High-Efficiency, 6-String, White-LED (WLED) Driver with Active Current Balancing for LCD Panel Applications

High-Efficiency White LED Driver for Multiple Series-Connected LEDs with Independent Regulation for Each String

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Part Details

  • Drives Six Parallel Strings with Multiple Series- Connected LEDs per String
  • ±1.5% Current Regulation Accuracy Between Strings
  • Low 450mV Feedback Voltage at Full Current Improves Efficiency
  • Step-Up Controller Regulates the Output Just Above the Highest LED String Voltage
  • Full-Scale LED Current Adjustable from 15mA to 25mA, or Preset 20mA
  • Wide 100:1 Dimming Range
  • Programmable Dimming Control: Direct DPWM or Analog Dimming
  • Built-In PLL for Synchronized Dimming Control
  • Open and Short LED Protections
  • Output Overvoltage Protection
  • Wide Input Voltage Range from 4.5V to 26V
  • External MOSFET Allows a Large Number of LEDs per String
  • 500kHz/750kHz/1MHz Switching Frequency
  • Small, 20-Pin, 4mm x 4mm Thin QFN Package
MAX8790
High-Efficiency, 6-String, White-LED (WLED) Driver with Active Current Balancing for LCD Panel Applications
MAX8790: Simplified Operating Circuit
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