Driving LED arrays with a constant current to better control LED brightness, lighting spectrum and lifetime expectancy, the AL9910 will deliver an output of between a few milliamps and 1A via an external MOSFET operating at a resistor programmable switching frequency up to 300kHz. Removing the need for a start-up resistor, a built-in voltage regulator delivers a gate drive to match and protect the switching MOSFET; 7.5V for the AL9910 and 10V for the companion AL9910A.
To extend device flexibility, the high efficiency AL9910 offers two separate dimming inputs for LED brightness control, a linear dimming input controlled by the application of a dc control voltage and a low frequency PWM dimming input accepting an external TTL compatible control signal with a duty ratio of 0-100% and at a frequency of up to a few kHz.
The AL9910 LED driver is priced at $0.60 each in 1k quantities.