AL8805W5
DIODES
16+
SOT23-6
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AL8805 is a step-down DC/DC converter designed to
drive LEDs with a constant current. The device can drive up
to 8 LEDs, depending on the forward voltage of the LEDs, in
series from a voltage source of 6V to 30V. Series connection
of the LEDs provides identical LED currents resulting in
uniform brightness and eliminating the need for ballast
resistors. The AL8805 switches at frequency up to 1MHz.
This allows the use of small size external components, hence
minimizing the PCB area needed.
Maximum output current of AL8805 is set via an external
resistor connected between the V
IN
and SET input pins.
Dimming is achieved by applying either a DC voltage or a
PWM signal at the CTRL input pin. An input voltage of 0.4V
or lower at CTRL switches off the output MOSFET simplifying
PWM dimming
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