Global Mixed-mode Technology Inc.
G5904
Four Channel High Efficiency White LED Driver
Features
Dynamic 1x/2x Charge...
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...