MAX1698

PRODUCTION

High-Efficiency Step-Up Current Regulator for LEDs

Data Sheet (Rev. 2) Product Selection Table
Part Models
4
1ku List Price
Starting From $1.67
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Part Details

  • Over 90% Efficiency
  • Lossless, Adjustable LED Brightness
  • Space-Saving 10-Pin µMAX Package
  • Simpler, Lower Cost, More Reliable Compared to CCFL or EL Backlights
  • Up to 5W Output Power
MAX1698
High-Efficiency Step-Up Current Regulator for LEDs
MAX1698, MAX1698A: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 4

Technical Articles 2

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Evaluation Kits

MAX1698EVKIT

Evaluation Kit for the MAX1698

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Features and Benefits

  • Input Voltage Down to +0.8V
  • 3x3 White LED Array
  • Potentiometer-Adjustable Output Current Level (LED Brightness Control)
  • External Low-Loss N-Channel Switch
  • 10nA IC Shutdown Current
  • Operation Up to 500kHz Switching Frequency
  • Surface-Mount Components
  • Fully Assembled and Tested

Product Details

The MAX1698 evaluation kit (EV kit) is a fully assembled and tested circuit board that contains a boost switching-regulator current source and array of white LEDs. As configured, the circuit is set up to drive 3 banks of 3 series LED arrays at 20mA each; however, a wide variety of other configurations are possible. The IC can be powered from a separate +2.7VDC to +5.5VDC input, while LED power has a wider input range and can be supplied either from a logic supply or battery source.

The MAX1698 features digital soft-start and adjustable lossless LED current control. The MAX1698 EV kit demonstrates low quiescent current, open-circuit protection, and up to 90% efficiency for maximum battery life. Operation up to 500kHz allows the use of tiny surface-mount components.

Applications

  • Backlight for LCD Panels
  • Battery-Powered Backlight Applications
  • Cell Phones
  • Handy Terminals
  • PDAs
MAX1698EVKIT
Evaluation Kit for the MAX1698

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