G2619 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – High Efficiency, Constant Current 20V White- LEDs Driver

Global Mixed-mode Technology
High Efficiency, Constant
LEDs Driver
Current
G2619
20V White-
Feature
„ 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
Ordering Information
ORDER
NUMBER
G2619RC1U
Note: RC: TDFN2X2-8
1 : Bonding Code
U: Tape & Reel
MARKING
2619
Pin Configuration
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.
The G2619 is available in TDFN2x2-8 packages.
TEMP.
RANGE
-40°C to 85°C
PACKAGE
(Green)
TDFN2x2-8
Typical Application Circuit
OVP 1
FB 2
DIMC 3
GND 4
G2619
GND9
Thermal
Pad (EP)
8 EN
7 PWM
6 BP
5 LX
TDFN2X2-8
※ Use the tantalum capacitor to eliminate inductor noise on
output terminal when you want to control dimming function.
Ver: 0.1
Jan 28, 2013
TEL: [phone]
http://www.gmt.com.tw
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