AL8811M8-13 Diodes Incorporated

AL8811 Boost/Buck/Inverting DC-DC CONVERTER Description Pin Assignments The AL8811 is a monolithic control circuit containing the primary functions required for DC-to-DC converters. These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This series is specifically designed for incorporating in Boost, Buck and voltage-inverting applications with a minimum number of external components. Features Operation from 3.0V to 20V Input Low Standby Current MSOP-8 Current Limiting Output Switch Current to 1.6A Applications Output Voltage Adjustable Low Voltage LED Lighting such as MR-16 Frequency Operation to 100 kHz General Purpose DC-DC Converter Precision 2% Reference Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AL8811 Pin Descriptions Pin Name Pin Number Descriptions Internal switch transistor collector: Current 1 Connect to Inductor for boost converter. Switch+ Connect to V for Buck or Inverting converter CC Internal switch transistor emitter: Current 2 Connect to GND for boost converter Switch- Connect to Inductor for buck or inverting converter CT 3 Timing Capacitor to control the switching frequency GND 4 Feedback 5 Feedback pin for inverting input of internal comparator VCC 6 Supply voltage pin Current Peak Current Sense Input by monitoring the voltage drop across an external current sense 7 Sense resistor to limit the peak current through the switch Current Current drive collector: 8 Drive Normally connected to V directly or via a resistor. CC Functional Diagram 2 of 11 June 2013 AL8811 Diodes Incorporated www.diodes.com Document number: DS36090 Rev. 2 - 2