DESCRIPTION
Regulated internal current sources deliver excellent current and brightness matching in all LEDs. The primary group (4 LEDs) can be used to backlight the main phone display. The second group (2 LEDs) can be used to backlight a secondary display or to provide other lighting features (keypad LEDs, for example). Brightness of the two groups can be adjusted independently with pulse-width modulated (PWM ) digital signals. The EUP2796 works off an extended Li-Ion input voltage range (2.7V to 5.5V). Voltage boost is achieved with a high-efficiency 3/2- gain charge pump. The EUP2796 is available in a 16-pin TQFN package. FEATURES
z z Drives up to 6 LEDs with up to 20mA each LEDs controlled in 2 Distinct Groups, for Backlighting 2 Displays (main LCD and sub-LCD) Excellent Current and Brightness Matching High Efficiency 3/2X Charge Pump Extended Li-Ion Input: 2.7V to 5.5V PWM Brightness Control: 100Hz - 1kHz 3mm × 3mm TQFN-16 Package RoHS Compliant and 100% Lead(Pb)-Free z z z z z z APPLICATIONS
z z z z Mobile Phone Display Lighting Mobile Phone Keypad Lighting PDAs General LED Lighting Typical Application Circuit Figure 1.
Eutech Microelectronics
