LM2755 Overview
Description
The LM2755 is a charge-pump-based, constant current LED driver capable of driving 3 LEDs with a total output current up to 90mA. The diode current waveforms of each LED can be trapezoidal with timing and level parameters (rise time, fall time, high level, low level, delay, high time, low time) programmed via an I2C-compatible interface.
Key Features
- 2 90% Peak Efficiency
- Total solution size < 13mm2
- No Inductor Required: Only 4 Inexpensive Ceramic Caps
- 3 Independently Controlled Constant Current Outputs
- Programmable Trapezoidal Dimming Waveform on Each Output
- Programmable Timing Control Via Internal Registers and External Clock Synchronization Input
- 32 Exponential Dimming Steps with 800:1 Dimming Ratio
- Programmable Brightness Control via I2CCompatible Interface
- Hardware Enable Pin
- Wide Input Voltage Range: 2.7V to 5.5V
