AL3644 Overview
The AL3644 is a dual LED flash driver that provides a high level of adjustability within a small solution size. The AL3644 utilizes a 2MHz or 4MHz fixed frequency synchronous boost converter to provide power to the dual 1.5A constant current LED sources. The dual 128 level current sources provide the flexibility to adjust the current ratios between LED1 and LED2.
AL3644 Key Features
- Dual Independent 1.5A LED Current Source Programmability
- Torch Currents up to 360mA (AL3644TT)
- Flash Timeout Values up to 1.6 Seconds (AL3644TT)
- Optimized Flash LED Current During Low Battery Conditions
- > 85% Efficiency in Torch Mode (at 100mA) and Flash Mode (at
- Grounded Cathode LED Operation for Improved Thermal
- Small Solution Size: < 2.36mm2
- Hardware Strobe Enable (STROBE)
- Synchronization Input for RF Power Amplifier Pulse Events (TX)
- Hardware Torch Enable (TORCH/TEMP)