AL6562AS-13 Diodes Incorporated

AL6562A Transition Mode PFC LED Controller Description Features The AL6562A is a current mode Power Factor Correction Controller Single Stage PFC Controller and is designed for operating in Transition Mode. With a superior Transition Mode Operation linear performance multiplier, it ensures the device operates over a Low Start-Up, Operating and Quiescent Currents wide input voltage range with superior THD (Total Harmonics Internal Start-Up Timer Distortion). The output voltage is controlled by means of an error Enable/Disable Function on INV Input amplifier and a precise (1% T = +25C) internal voltage reference. J Totem Pole, Push-Pull Output Drive Adjustable Output Overvoltage Protection The AL6562A is designed to meet stringent energy-saving standards SO-8 : Available in Green Molding Compound (No Br, Sb) with low start-up current, and can operate with low current Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) consumption when entering stand-by mode. Halogen and Antimony Free. Green Device (Note 3) OVP circuitry increases system robustness, allowing the device to withstand transient caused at start-up and during load-disconnects. Pin Assignments Applications Electronic Single-Stage LED Driver PFC pre-regulators for: (Top View) IEC61000-3-2 compliant SMPS (Flat TV, monitors, desktop PC, games) 1 INV 8 Vcc HI-END AC-DC adapter/charger up to 350W 2 GD COMP 7 AL6562A Electronic ballast MULT GND 3 6 Entry level server & web server CS 4 5 ZCD SO-8 Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AL6562A Pin Descriptions Pin Number Pin Name Brief Description Inverting Input Pin of the Internal Error Amplifier. This pin is connected externally via a resistor divider from the regulated output voltage. It can provide 1 INV input to inverting input of internal error amplifier. This pin can also be used as ENABLE/DISABLE control input. Output from Error Amplifier. A feedback compensation network consisting of resistor and capacitor connects between INV (Pin1) 2 COMP and this pin to reduce the bandwidth and achieve stability of the voltage control loop and ensure high power factor and low THD. Input to the Internal Multiplier. This pin connects to the rectified mains voltage through external resistor divider to provide a sinusoidal 3 MULT voltage reference for the control current loop. Current Sense Connecting to External Resistor for Current Feedback. The current flowing in the MOSFET is sensed through a resistor, the resulting voltage is applied to this 4 CS pin and compared with an internal sinusoidal-shaped reference generated by the multiplier to determine MOSFETs turn-off. This pin has an internal Leading-Edge-Blanking of about 200 nanoseconds to improve noise immunity. Zero Current Detection. 5 ZCD This pin takes input from inductors demagnetization sensing to achieve zero current detection, required for Transition Mode (TM) operation. A negative-going edge triggers turn-on of MOSFET. System Ground. 6 GND Ground for circuit. Current return for both the signal circuitry and the gate drive stage. Gate Driver Output. This pin is able to drive external MOSFET. The totem-pole output stage is able to drive MOSFET with a peak current of 600mA/800mA for source and sink capability respectively. The high level voltage of this 7 GD pin is internally clamped at about 12V to avoid excessive gate voltage in case V pin is supplied by a CC higher voltage. System Power Input Pin. This pin is for supply voltage of both the signal part and gate driver of the IC. Upper limit is extended to 8 V CC a maximum of 22V to provide more headroom for supply voltage changes. This pin has an internal 25V Zener to protect the IC itself from overvoltage transients. Functional Block Diagram COMP MULT CS 2 3 4 1 INV 40K Multiplier INV Disable Overvoltage 10 pF 1.7V Detection Voltage Regulation 0.47 V/0.3V VCC 8 VCC R Q Internal Supply R1 7.5 S V 24V UVLO 7 INV Disable Driver GD Vref R2 Zero Current Detector 2.1V Starter 1.6V Upper & Lower ZCD Disable Clamp 6 5 GND ZCD 2 of 16 AL6562A September 2015 Diodes Incorporated www.diodes.com Document Number: DS38122 Rev. 1-2 NEW PRODUCT