G5904 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 ponents, and the regulation scheme.
G5904 Key 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