Description
19-2783; Rev 2; 8/05 EVAALVUAAILTAIOBNLEKIT High-Efficiency Step-Up Converters for White LED Main and Subdisplay Backlighting MAX1582/MAX1582Y Ge.
The MAX1582/MAX1582Y drive up to six white LEDs in series with a constant current to provide display backlighting for two (main and sub-) displays in.
Features
* Accurate Current Regulation for Uniform Illumination
* Lights Up Two LED Sections for Main and Subdisplays
* Up to 84% Efficiency
* Internal High-Power, 30V MOSFET
* Low 15mVP-P Input Ripple
* Flexible Dimming Control
Analog DAC Controlled Direct-Dig
Applications
* Cell Phones with One or Two Displays
Smart Phones, Palmtops, and Wireless Handhelds
Other Handheld Devices with Dual Displays
Typical Application Circuit
INPUT 2.6V TO 5.5V
22μH
2.2μF
ANALOG OR DIRECT PWM
DIMMING
0.022μF
V+
LX
VP MAX1582
OUT1
CTRL PGND
EN1
OUT2
EN2
0.1μF
2 TO 4 LEDS 2 TO
