AL5802-7

AL5802 LINEAR MODE CURRENT SINK LED DRIVER Description Pin Assignments The AL5802 combines a high gain NPN transistor with a pre-biased NPN transistor to make a simple small footprint LED driver. (Top View) 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. 6 5 4 Q1 Q2 The AL5802’s open-collector output can operate from 0.8V to 30V, making it suitable for industry-standard 5V to 24V power supplies without additional components. 1 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. 2 3 SOT26 The AL5802 is available in the SOT26 (SC74R) package and is ideal for driving 20mA to 120mA LED currents. Applications Features • • • • • • • • • 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 lead-frame Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen- and Antimony-Free. “Green” Device (Note 3) For automotive applications requiring specific change control (i.e.: parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please refer to the related automotive grade (Q-suffix) part. A listing can be found at https://www.diodes.com/products/automotive/automotiveproducts/. This part is qualified to JEDEC standards (as references in AEC-Q) for High Reliability. https://www.diodes.com/quality/product-definitions/ Notes: AL5802 • • • Linear LED drivers LED signs Offline LED luminaries 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain