With an integrated 30V 0.6Ω MOSFET and power Schottky diode, the AL3050 can drive up to eight LEDs in series with the capability to connect multiple LED strings in parallel. It offers modes for regular PWM dimming with a 100:1 deep dimming ratio and a single-wire digital-dimming mode that provides a 32-step programmable brightness capability. The boost converter operates at a fixed 750 kHz switching frequency to reduce output ripple, improve conversion efficiency and allow for the use of small external components.
The AL3050 ensures reliable system performance with LED-short and LED-open protection and system-start current limits, as well as providing standard over-current, over-voltage and over-temperature functionality. In 2 x 2 mm U-DFN2020 package, the AL3050 is priced at $0.15 (10,000).