G2619 Global Mixed-mode Technology High Efficiency, Constant Current 20V WhiteLEDs Driver Feature Description The G2619 step-up converter drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. It features allowing series connection of the white LEDs so that the LED currents are identical for uniform brightness. An enable input can be pulsed repeatedly to adjust LED’s brightness. The fast 1.0 MHz current-mode PWM control allows for smaller capacitor and inductor. Fault condition protection uses cycle-by-cycle current limiting to sense maximum inductor current, thermal protection and over-voltage protection. Also included soft-start eliminates inrush current during start-up. The low reference voltage minimized the power loss across the current-setting resistor. Operating Voltage: 2.5V to 20V. High Operating Frequency: 1MHz High Output Voltage: Up to 20V(Typ.) Digital Dimming Control. Built-in Cycle-by Cycle Current-Limiting. Built-in Soft-Start Function. 0.2V Low Reference Voltage Thermal Overload Protection Thin 8-Lead 2x2 TDFN Packages Application GPS Navigation System Compact Back Light Module Constant Current Source LED Module The G2619 is available in TDFN2x2-8 packages. Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G2619RC1U 2619 -40°C to 85°C TDFN2x2-8 Note: RC: TDFN2X2-8 1 : Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit G2619 OVP 1 8 EN 7 PWM GND9 FB 2 Thermal Pad (EP) DIMC 3 6 BP GND 4 5 LX TDFN2X2-8 ※ Use the tantalum capacitor to eliminate inductor noise on output terminal when you want to control dimming function. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.1 Jan 28, 2013 1