Analog Devices Inc.

Category: LEDs

The MAX1698 and MAX1698A are efficient drivers forwhite or color LEDs. They are ideal for large LED backlitdisplays in PDAs and laptop computers. Numerousbenefits include greater simplicity, lower cost, higherefficiency, longer bulb life, and greater reliability whencompared to fluorescent (CCFL) and electroluminescent(EL) lamps.The MAX1698/MAX1698A are switch-mode boost controllersin which LED current, rather than output voltage,is regulated The devices drive series-connected LEDswith a controlled current that is measured with a typically15Ω sense resistor, not an expensive fractional-ohm value. LED current control and dimming are accomplishedwith an adjust input (ADJ). For larger light output,multiple LED banks can be connected in parallelwith up to 5W total output power.The MAX1698A has a higher, and more accuratelyspecified, CS current limit than the MAX1698 for higherpowerapplications of 5W or more. Both devices aresupplied in a space-saving 10-pin µMAX package thatoccupies half the space of an 8-pin SO. An evaluationkit (MAX1698EVKIT) is available to speed designs.ApplicationsBacklight for LCD PanelsBattery-Powered Backlight ApplicationsCell PhonesHandy TerminalsPDAs

$1.94 - $5.33