LM3642
Overview
The LM3642 is a 4-MHz fixed-frequency synchronous boost converter plus 1.5-A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing Flash current up to 1.5 A.
- 1 1.5-A High-Side Current Source for Single LED
- > 85% Efficiency in Torch Mode (at 100 mA) and Flash Mode (at 1 A to 1.5 A)
- Accurate Programmable Flash LED Current from 93 mA to 1.5 A
- Accurate Programmable Torch LED Currents: - 48.4 mA to 375 mA - 24 mA to 187 mA (LT option)
- Small Solution Size: < 20 mm2
- Soft-Start Operation for Battery Protection
- Hardware Strobe Enable
- Synchronization Input for RF Power Amplifier Pulse Events
- VIN Flash Monitor Optimization
- 400-kHz I2C-Compatible Interface
