General Description
●The LM3560 is a 2MHz fixed frequency synchronous boost converter with two 1000 mA constant current drivers for high current white LEDs. The dual high-side current sources allow for grounded cathode LED operation and can be tied together for providing flash currents at up to 2A through a single LED.
●An adaptive regulation method ensures the current for each LED remains in regulation and maximizes efficiency.
●Features
●■ Dual High-Side Current Sources Allow for Grounded Cathode LED Operation
●■ Accurate and Programmable LED Current from 31.25 mA to 2A
●■ Independent LED Current Source Programmability
●■ Up to 90% Efficient
●■ Ultra-Small Solution Size: < 26 mm2
●■ Four Operating Modes: Torch, Flash, Privacy Indicate, and Message Indicator
●■ 4-bit ADC for VLED Monitoring
●■ LED Thermal Sensing and Current Scale-Back
●■ Hardware Flash and Torch Enable
●■ Dual Synchronization Inputs for RF Power Amplifier Pulse Events
●■ LED and Output Disconnect During Shutdown
●■ Open and Short LED Detection
●■ 400 kHz I2C-Compatible Interface
●■ Active Low Hardware Reset
●■ 16-Bump (1.97mm x 1.97mm x 0.6mm) micro SMD
●Applications
●■ Camera Phone LED Flash
●■ White LED Biasing
