Marvell 88EM8080/88EM8081 Digital Flyback PFC Controller For LED Lighting Applications PRODUCT OVERVIEW The Marvell® 88EM8080/88EM8081 is a high performance, low-cost, minimum component count controller for single stage Flyback LED lighting applications. The single-stage Flyback PFC LED controllers can be used for a wide variety of solid state lighting applications with output power ranges up to 150W. The 88EM8080/88EM8081 includes the Marvell patented adaptive control-loop design to achieve a power factor up to 0.99 and the lowest Total Harmonic Distortion (THD) in the industry, enabling a wide range of voltage and load conditions for more reliable and robust LED lighting systems. Unlike traditional analog PFC based solutions, the 88EM8080/88EM8081 utilizes Marvell’s innovative Digital Signal Processing (DSP) solution improving the steady state and transient performance. This offers customers the smallest package and lowest system bill of materials (BOM). The combination of the adaptive control loop design built on top of the DSP solution elevates industry standards for PFC controllers. Both devices work at fixed frequencies, 88EM8080 at 60kHz while 88EM8081 at 120kHz. The IC operates under Continuous Conduction Mode (CCM) or Discontinuous Conduction Mode (DCM) or both combined together operating in Mixed Mode. The internal voltage loop compensation and current loop control guarantee system stability and thus reduce the external component count and costs. The 8-pin SOIC package further facilitates the application design process, saving board space. The resultant simple system design and minimum cost makes 88EM8080/88EM8081 the ideal choice for single stage LED lighting applications. APPLICATIONS Devices powered by the Marvell 88EM8080/8081 include the following Solid State Lighting (SSL) applications: •Incandescent bulb and CFL replacements • Commercial lighting arrays •Fluorescent light replacements • Signs and spot lights for retail, restaurants, bars, hotels, etc. •Streetlights and parking lights • Pendants, downlights, accent and mood lighting •Recessed lighting • Floodlights, pathway and marker illumination 88EM8080/8081 APPLICATIONS SCHEMATIC DIAGRAM PFC HVDC Cf L Db LED+ Ce Rh Rm Cg Bridge Rectifier T1 Da RS1J Cd NTC1 Rn N Qa Rg Ch U1 Cc ISNS VIN Ca OCP Marvell 88EM8080/ 8081 FB VDD U3 SGND Rs Rk De VREF Ru PGND SW Rw U2 Re Rb Rc Rp Rf Ra LED- Ck Opto-Coupler Rt VDD P/O Opto-Coupler Cb Rd Fig 1. 88EM8080/8081 Block Diagram – Isolated Single-Stage Flyback LED Driver Cm Rv Rx Marvell 88EM8080/88EM8081 FEATURES BENEFITS • Proprietary DSP control with adaptive loop coefficient • Up to 0.99 power factor and low total harmonic distortion for a wide range of line and load conditions • Continuous Conduction Mode (CCM) / Discontinuous Conduction Mode (DCM) / CCM and DCM Mixed Mode of operation • Higher efficiency; Transformer size up to 50% smaller • Average current mode control • No slope compensation required • Adaptive voltage control loop • High power factor and low THD under high input voltage and low load conditions • 1.2A (typical) driver capability • Higher power capability up to 150W • Adaptive over current protection for universal input voltage • Improved protection and increased reliability • No external compensation • Reduce design time, component count and costs • Built-in under voltage lockout (UVLO) • Over voltage protection (OVP) • Thermal shutdown • Fixed operating frequency: 60kHz (8080), 120kHz (8081) • Input line frequency range between 45Hz-65Hz • Universal input applications EVALUATION BOARD – 30W LED Driver Fig 2. Evaluation Board Front Fig 3. Back PLATFORM SUPPORT FUTURE DERIVATIVES •LED Driver Evaluation Board – 30W •Networking •LED Driver Reference Designs – 5W, 10W, 20W, 60W and 100W •Wireless (Zigbee etc.) •Green PHY THE MARVELL ADVANTAGE: Marvell chipsets come with complete reference designs which include board layout designs, software, manufacturing diagnostic tools, documentation, and other items to assist customers with product evaluation and production. Marvell’s worldwide field application engineers collaborate closely with end customers to develop and deliver new leading-edge products for quick time-to-market. Marvell utilizes world-leading semiconductor foundry and packaging services to reliably deliver high-volume and low-cost total solutions. ABOUT MARVELL: Marvell is a leader in storage, communications, and consumer silicon solutions. Marvell’s diverse product portfolio includes switching, transceiver, communications controller, processor, wireless, power management, and storage solutions that power the entire communications infrastructure, including enterprise, metro, home, storage, and digital entertainment solutions. For more information, visit our Web site at www.marvell.com. Marvell Semiconductor, Inc. 5488 Marvell Lane Santa Clara, CA 95054 Phone 408.222.2500 www.marvell.com Copyright © 2010. Marvell International Ltd. All rights reserved. Marvell, Moving Forward Faster, and the Marvell logo are registered trademarks of Marvell or its affiliates. All other trademarks are the property of their respective owners. 88EM8080/8081-04 8/10