Texas Instruments LM3549SQE/NOPB

Description
The LM3549 is a high-power LED driver capable of delivering up to 700mA of output current. It features three constant current LED drivers and a buck-boost SMPS for driving RGB LEDs with high efficiency. The LED drivers are designed for sequential drive, allowing only one driver to be enabled at a time.
LED driver output current settings can be stored in integrated non-volatile memory, enabling standalone operation without I²C control. The non-volatile memory is rewritable, allowing current settings to be modified as needed.
The LM3549 incorporates a fault detection feature that can detect various fault conditions. In the event of a fault, error flags are set, and the FAULT output sends an interrupt to the control logic. Error flags can be read through the I²C interface.
Total brightness can be controlled via PWM input or through the master fader register when using the PC interface.

Features
Integrated buck-boost converter
Programmable LED drivers
700mA maximum drive current
16% current accuracy over temperature
24-pin WQFN package
Over-current protection
Over-temperature protection
I²C compatible interface
Under-voltage lockout
LED open and short protection and detection
95% peak efficiency buck-boost converter
NVM memory for calibration data and standalone usage without I²C control
Soft start

Applications
Portable video projectors
High-power LED driving