LM3561 Overview
The LM3561 is a 2-MHz fixed-frequency currentmode synchronous boost converter. The device is designed to operate as a single 600-mA constant current driver for high-current white LEDs. The highside current source allows for grounded cathode LED operation while the 250-mV regulated headroom voltage ensures that the LED current is well regulated and efficiency remains high.
LM3561 Key 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
- Accurate and Programmable LED Current from
- 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