LM27964 Description
The LM27964 is a charge-pump-based white-LED driver that is ideal for mobile phone display backlighting. The LM27964 can drive up to 6 LEDs in parallel along with multiple keypad LEDs, with a total output current up to 180mA. Regulated internal current sources deliver excellent current matching in all LEDs.
LM27964 Key Features
- 2 87% Peak LED Drive Efficiency
- 0.2% Current Matching between Current Sinks
- Dedicated Keypad LED Driver with up to 80mA of Drive Current
- Independent Resistor-Programmable Current Settings
- I2C patible Brightness Control Interface
- Adaptive 1×- 3/2× Charge Pump
- Extended Li-Ion Input: 2.7V to 5.5V
- Small Low Profile Industry Standard Leadless Package, WQFN-24 : (4mm x 4mm x 0.8mm)
- LM27964SQ-I LED PWM Frequency = 10kHz, LM27964SQ-C LED PWM frequency = 23kHz