Description of AL8808
The AL8808 is a step-down DC/DC converter designed to drive °Cs with a constant current. The device can drive up to 8 °Cs, depending on the forward voltage of the °Cs, in series from a voltage source of 6V to 30V. Series connection of the °Cs provides identical °C currents resulting in uniform brightness and eliminating the need for ballast resistors. The AL8808 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 AL8808 is set via an external resistor connected between the VIN 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.
It is available in TSOT25.
Applications of AL8808
Features of AL8808
● LED Driving Current Up to 1A
● Better Than 5% Accuracy
● igh Efficiency Up to 96%
● ast Control°C Falling Edges 7ns
● Operating Input Voltage from 6V to 30V
● High Switching Frequency Up to 1MHz
● PWM/DC Input for Dimming Control
● Built-In Output Open-Circuit Protection
● Built-In Over-Temperature Protection
● TSOT25: Available in “Green” Molding Compound (No Br, Sb) - Totally Lead-Free & Fully RoHS Compliant - Halogen and Antimony Free. “Green” Device
Downloads of AL8808
AL8808 datasheet.pdf
AL8808 6~30Vin@8W Ultra low cost and high efficiency of small LED driver solution.rar
Typical Applications Circuit of AL8808
AL8808 electrical test parameters
