DIODES AL5802-7

The AL5802 combines a high gain NPN transistor with a pre-biased NPN transistor to make a simple small footprint LED driver. The LED current is set by an external resistor connected from REXT pin (6) to GND pin (4), the internal high gain transistor develops approximately 0.6V across the external resistor. The AL5802 open-collector output can operate from 0.8V to 30V enabling it to operate from 5V to 24V power supplies without additional components. PWM dimming of the LED current can be achieved by either driving the BIAS pin (2) with a low impedance voltage source, or driving the EN pin (3) with an external open-collector NPN transistor or opendrain N-channel MOSFET. The AL5802 is available in a SOT26 package and is ideal for driving 20mA to 120mA LED currents.

• Reference voltage VRSET = 0.65V
• -40 to +125°C temperature range
• 0.8V to 30V open-collector output
• Negative temperature co-efficient – automatically reduces the LED current at high temperatures
• Low thermal impedance SOT26 with copper leadframe
• Totally Lead-Free & Fully RoHS Compliant
• Halogen and Antimony Free. “Green” Device
• Qualified to AEC-Q101 Standards for High Reliability

• Linear LED driver
• LED signs
• Offline LED luminaries