LM3561 Datasheet | Texas Instruments

.ti. SNOSB44C - MARCH 2011 - REVISED MAY 2013 Synchronous Boost Converter With 600-m A High-Side LED Driver and I2C-patible Interface Check for Samples: LM3561 Features - 2 High-Side Current Source Allows Grounded LED Cathode - Up to 90% Efficient - Ultra-Small Solution Size: <16mm2 - Three Operating Modes: Torch, Flash, and LED Indicator - Accurate and Programmable LED Current from 18m A to 600m A - Hardware Flash and Torch Enable - LED Thermal Sensing and Current Scaleback - Software Selectable Input Voltage Monitor - Programmable Flash Timeout - Dual Synchronization Inputs for RF Power Amplifier Pulse Events - Open and Short LED Detection - Active High Hardware Enable for Protection Against System Faults - 400k Hz I2C-patible Interface - 12-Bump (1.215mm × 1.615mm × 0.6mm) DSBGA Package APPLICATIONS - Camera Phone LED Flash Controller - LED Current Source Biasing DESCRIPTION The LM3561 is a 2-MHz fixed-frequency currentmode synchronous boost converter. The device is designed to operate as a single 600-m A constant current driver for high-current white LEDs. The highside current source allows for grounded cathode LED operation while the 250-m V regulated headroom voltage ensures that the LED current is well regulated and efficiency remains...