The LT3761EMSE#PBF is a LED Controller with internal PWM generator designed to operate as a constant-current source and constant-voltage regulator. It features a programmable internal PWM dimming signal. The LT3761 is ideally suited for driving high current LEDs, but also has features to make it suitable for charging batteries and super capacitors. The fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. A voltage feedback pin serves as the input for several LED protection features and also makes it possible for the converter to operate as a constant-voltage source. A frequency adjust pin allows the user to program the frequency from 100kHz to 1MHz to optimize efficiency, performance or external component size. The LT3761 senses output current at the high side or at the low side of the load. The PWM input can be configured to self-oscillate at fixed frequency with duty ratio programmable from 4% to 96%.
● 3000:1 True colour PWM™ dimming for LEDs
● 0 to 80V Rail-to-rail current sense range
● Programmable PWM dimming signal generator
● Constant current (±3%) and constant-voltage (±2%) regulation
● Analogue dimming
● Drives LEDs in boost, SEPIC, inverting, buck mode, buck-boost mode or flyback configuration
● Output short-circuit protected boost
● Open LED protection and reporting
● 100kHz to 1MHz Adjustable switching frequency
● Programmable VIN UVLO with hysteresis
● C/10 indication for battery chargers
● Low shutdown current (<1µA)
