MAX1698A Datasheet | Maxim Integrated

Description The MAX1698 and MAX1698A are efficient drivers for white or color LEDs. They are ideal for large LED backlit displays in PDAs and laptop puters. Numerous benefits include greater simplicity, lower cost, higher efficiency, longer bulb life, and greater reliability when pared to fluorescent (CCFL) and electroluminescent (EL) lamps. The MAX1698/MAX1698A are switch-mode boost controllers in which LED current, rather than output voltage, is regulated The devices drive series-connected LEDs with a controlled current that is measured with a typically 15Ω sense resistor, not an expensive fractional-ohm value. LED current control and dimming are acplished with an adjust input (ADJ). For larger light output, multiple LED banks can be connected in parallel with up to 5W total output power. The MAX1698A has a higher, and more accurately specified, CS current limit than the MAX1698 for higherpower applications of 5W or more. Both devices are supplied in a space-saving 10-pin µMAX package that occupies half the space of an 8-pin SO. An evaluation kit (MAX1698EVKIT) is available to speed designs. - Over 90% Efficiency - Lossless, Adjustable LED Brightness - Space-Saving 10-Pin µMAX Package - Simpler, Lower Cost, More Reliable pared to CCFL or EL Backlights - Up to 5W Output Power Features MAX1698/MAX1698A Ordering Information PART MAX1698EUB MAX1698AEUB TEMP RANGE PINPACKAGE PKG CODE U10-2 U10-2 -40°C to +85°C 10µMAX -40°C to +85°C 10µMAX Pin Configuration TOP VIEW VCC 1 SHDN REF ADJ GND 2 3 4 5 10 EXT 9 CS PGND GND FB Applications Battery-Powered Backlight Applications Backlight for LCD Panels Notebook PCs Handy Terminals PDAs MAX1698 MAX1698A 8 7 6 µMAX Typical Operating Circuit L VBATT D1 VOUT COUT VCC VCC MAX1698 MAX1698A SHDN REF ADJ FB GND RFB RN EXT ON OFF CS PGND ILED ________________________________________________________________ Maxim Integrated Products For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at...