LM3648 Description
The LM3648 is an LED flash driver that provides a high level of adjustability within a small solution size. The LM3648 utilizes a 2-MHz or 4-MHz fixedfrequency synchronous boost converter to provide power to the 1.5-A constant current LED source. An adaptive regulation method ensures the current source remains in regulation and maximizes efficiency.
LM3648 Key Features
- 1 1.5-A LED Current Source Programmability
- Accurate and Programmable LED Current Range
- Torch Currents up to 500 mA (LM3648TT)
- Flash Timeout Values up to 1.6 Seconds
- Optimized Flash LED Current During Low Battery
- > 85% Efficiency in Torch Mode (at 100 mA) and
- Grounded Cathode LED Operation for Improved
- Small Solution Size: < 16 mm2
- Hardware Strobe Enable (STROBE)
- Synchronization Input for RF Power Amplifier