Marvell 88EM8511 Low-Cost, High-Efficiency, Offline AC/DC Controller with DC/DC Buck Converter PRODUCT OVERVIEW The Marvell® 88EM8511 is a highly efficient offline power supply controller for control circuits in smart lighting application including LED drivers, ballasts, dimmers, sensors, switches and many other applications. The device combines a high voltage (600V) MOSFET for the AC/DC stage and a DC/ DC Buck Converter with two low voltage MOSFETS into a single compact package. This high level of integration simplifies design and eliminates many external components resulting in a low cost bill-ofmaterials. The 88EM8511 is ideal for applications that require constant power supply for control circuits while the rest of the power circuit is switched off thereby assisting the end system to meet Energy Star requirements. The 88EM8511 generates a high voltage (18V) output directly from the AC line input. An internal high efficiency DC/DC buck converter is employed to produce a regulated low voltage output that can drive up to 100mA of load. The low voltage output is preset to 3V and can be adjusted by an external resistor divider from 1.2V to 5.5V. 88EM8511 APPLICATION SCHEMATICS UHV MOSFET VAC Current Limit VDD C Protection and AC/DC Control Logic AC L DC/DC Control Circuit and Logic Vout SW NC VSS DIS FB Out FB_SEL R1 R1 Sel R2 R2 Fig 1. 88EM8511 Application Diagram KEY FEATURES AND BENEFITS KEY FEATURES BENEFITS •• AC/DC Regulator – Universal AC input range – Bridge rectifier support – Current limit start-up – Peak output voltage control •• High level of integration reduces BOM cost Marvell 88EM8511 KEY FEATURES AND BENEFITS continued KEY FEATURES BENEFITS •• DC/DC Regulator – Pre-set 3V output or adjustable output with external resistor divider – Peak current load – 100mA load current – No external compensation needed •• High efficiency VAC to VOUT (up to 45%) •• Thermal shutdown •• Compact size for space constrained applications such as drivers for switches, sensors and bulbs •• SOIC-8 with E-pad •• Helps meet Energy Star compliance •• Operating temperature: -40 to 125°C (Tj max at 150°C) Fig 2. 88EM8511 IC - Front / Back (enlarged) TARGET APPLICATIONS The Marvell 88EM8511 is ideally suited for use as AC/DC power for control circuits in: • Smart LED Lamps • Smart LED Drivers • Ballasts sensors • Switches/dimmers • Internet of things 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. Marvell Semiconductor, Inc. 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. 5488 Marvell Lane Santa Clara, CA 95054 Phone 408.222.2500 w ww.marvell.com Copyright © 2013. Marvell International Ltd. All rights reserved. Marvell and the Marvell logo are registered trademarks of Marvell. All other trademarks are the property of their respective owners. p/n Marvell_88EM8511_IC-01 3/13