Light LED driver 100 V, 350 mA | AL5801

The AL5801 combines a 100V N-channel MOSFET with a pre-biased NPN transistor to make a simple small footprint LED driver. The LED current is set by an external resistor connected to from REXT pin (4) to GND pin (6), the internal pre-biased transistor develops approximately 0.56V across the external resistor. The AL5801 open-drain output can operate from 1.1V to 100V enabling it to operate from 5V to 100V power supplies without additional components. PWM dimming of the LED current can be achieved by driving the BIAS pin (1) with an external open-collector NPN transistor or open-drain N-channel MOSFET. The AL5801 is available in a SOT26 package and is ideal for driving LED currents up to 350mA. Features and Benefits Feedback pin reference voltage VRSET = 0.56V at +25ºC -40 to +125ºC temperature range 1.1V to 100V open-drain output Negative temperature VRSET co-efficient automatically reduces the LED current at high temperatures SOT26: Available in Green Molding Compound (No Br, Sb) Low thermal impedance SOT26 with copper lead frame