LM3559
Overview
The LM3559 is a 2-MHz fixed-frequency synchronous boost converter with two 900-mA constant current drivers for high-current white LEDs. The dual highside current sources allow for grounded cathode LED operation and can be tied together for providing flash currents of up to 1.8 A.
- 1 Dual High-Side Current Sources Allow for Grounded Cathode LED Operation
- Accurate and Programmable LED Current from 28.125 mA to 1.8 A
- Optimized Flash Current During Low Battery Conditions
- Independent LED Current Source Programmability
- Four Operating Modes: Torch, Flash, Privacy Indicate, and Message Indicator
- 4-Bit Analog-to-Digital (ADC) for VLED Monitoring
- Battery Voltage Sensing and Current Scale-Back
- LED Sensing and Current Scale-Back
- Hardware Flash and Torch Enable
- Active-Low Hardware Reset
