G5904

Global Mixed-mode Technology Inc. G5904 Four Channel High Efficiency White LED Driver Features „ Dynamic 1x/2x Charge Pump Switching „ Up to 80mA (20mA/LED) Drive Capability „ 90% Average Efficiency „ 0.5% (TYP) LED Current Matching „ Wide Current Range per LED [0.1mA ~ 20mA] „ Single Wire EN/Brightness Control „ 2.7V to 5.5V Supply Voltage Range „ < 1µA Shutdown Current „ Output Over-voltage Protection „ Open/Short LED Protection „ Thermal Shutdown Protection „ TDFN2.5X2.5-10 and TQFN3X3-16 Package Applications „ Mobile Phones „ White LED Backlighting „ Camera Flash LED Lighting General Description The G5904 charge pump drives up to four white LEDs with regulated constant current for uniform intensity. By utilizing dynamic 1x/2x charge-pump modes and ultra-low-dropout current regulators, it achieves high efficiency over the 1-cell lithium battery input voltage range. The 250kHz fixed frequency switching allows for tiny external components, and the regulation scheme...