AL8400QSE-7 Diodes Incorporated

Green AL8400 /AL8400Q LINEAR LED DRIVER-CONTROLLER with 200mV CURRENT SENSE VOLTAGE and AUTOMOTIVE GRADE Description Pin Assignments The AL8400 is a 5-terminal adjustable Linear LED driver-controller offering excellent temperature stability and output handling capability. The AL8400 simplifies the design of linear and isolated LED drivers. With its low 200mV current sense FB pin, it controls the regulation of LED current with minimal power dissipation when compared to traditional linear LED drivers. This makes it ideal for medium to high current LED driving. The AL8400 open-collector output can operate from 0.2V to 18V enabling it to drive external MOSFET and Bipolar transistors. This enables the MOSFET and Bipolar selection to be optimized for the chosen application. It also provides the capability to drive longer LED chains, by tapping V from the chain, where the chain voltage may CC Features exceed 18V. Low Reference Voltage (V = 0.2V) FB It is available in the space saving low profile SOT353 package. -40 to +125C Temperature Range 3% Reference Voltage Tolerance at +25C The AL8400Q is Automotive Grade and is AEC-Q100 Grade 1 Low Temperature Drift qualified. 0.2V to 18V Open-Collector Output High Power Supply Rejection: Applications (> 45dB at 300kHz) Isolated Offline LED Lamps AL8400QSE-7 Automotive Grade qualified to AEC-Q100 Grade 1 Linear LED Driver SOT353: Available in Green Molding Compound (No Br, Sb) LED Signs Lead-Free Finish RoHS Compliant (Notes 1 & 2) Instrumentation Illumination Halogen and Antimony Free. Green Device (Note 3) Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied. 2. See AL8400 /AL8400Q Pin Descriptions Pin Name Function Number 1 E1 Emitter Connection. Connect to GND. 2 GND Analog Ground. Ground return for reference and amplifier. Connect to E1. 3 V Supply Input. Connect a 0.47 F ceramic capacitor close to the device from V to GND. CC CC 4 FB Feedback Input. Regulates to 200mV nominal. 5 OUT Output. Connect a capacitor close to device between OUT and GND. See the Applications Information section. Functional Block Diagram Figure 1 Block Diagram Absolute Maximum Ratings ( T = +25C, unless otherwise specified.) A Symbol Parameter Rating Unit V Supply Voltage Relative to GND 20 V CC V OUT Voltage Relative to GND 20 V OUT V FB Voltage Relative to GND 20 V FB V E1 Voltage Relative to GND -0.3 to+0.3 V E1 T Operating Junction Temperature -40 to 150 C J T Storage Temperature -55 to 150 C ST These are stress ratings only. Operation outside the absolute maximum ratings may cause device failure. Operation at the absolute maximum rating for extended periods may reduce device reliability. Package Thermal Data P DIS Package JA T = +25C, T = +150C A J SOT353 400C/W 310mW 2 of 13 August 2012 AL8400/ AL8400Q Diodes Incorporated www.diodes.com Document number: DS35115 Rev. 4 - 2