Anax ANX6923
The ANX6923 is a highly compact white LED driver especially optimized for thin-film transistor (TFT) liquid crystal displays (LCDs) backlight. The chip can drive up to six strings of LEDs and up to ten LEDs in series per string. The ANX6923 offers a built-in high efficiency current mode boost converter.FEATURES
● Wide input range from 2.7V to 24V● Integrated 2.7A/40V boost converter FET
● Built-in loop compensation and soft-start
● Six programmable current sinks
●Current up to 30mA per channel
●PWM dimming from 100Hz to 30kHz
●Ultra low dimming cycle 0.005% @ 100Hz dimming frequency
●2.5% current matching
●3% current accuracy
● Protection:
●LED string open/short detection
●Overvoltage protection
●Overcurrent protection
●Overtemperature protection
● Thin 3x3 mm 16-lead WQFN package
● Rohs compliant and 100% Lead(Pb)Free/Green QFN-16PIN CONFIGURATION NC EN CH6 CH5 16 15 14 13 PGND 1 12 CH4 LX 2 VIN 3 Exposed Thermal Pad 11 PWM 10 AGND VOUT 4 9 CH3 5678 ISET CIN CH1 CH2
APPLICATIONS
● Notebook/Ultrabook/Tablet PC Display Backlight● Car Navigator/Entertainment Display Backlight
● Flash light or utility light Jan. 2013 Preliminary ANX6923_003 Copyright © 2011, Anax Technology Corp.
DESCRIPTION
Wide input voltage range from 2.7V to 24V makes ANX6923 well suited for applications ranging from a one-cell lithium-ion battery tablet PC to a full-size notebook PC.