Marvell 88EM8187 Shimmerless, Flicker-free, Deep Dimming Single-Stage AC/DC LED Driver IC for Replacement LED Lamps and Luminaires PRODUCT OVERVIEW The Marvell® 88EM8187 is the second generation, phase-cut, deep-dimming, single-stage AC/DC constant current controller designed for offline dimmable LED lighting applications. This LED driver IC, with a digital core on-chip, provides premium dimming performance with the highest level of compatibility and shimmerless dimming down to 1%. The chip supports both isolated and non-isolated design topologies and works with both low and high voltage LED loads. Bill of material costs are significantly reduced as fewer and smaller components are required in EMI, damping and dimming level control circuits. Most importantly, the 88EM8187 system achieves highest reliability with advanced thermal dissipation optimization in dimmer and dimmer level management circuits and thermal foldback capability due to unique intellectual property (IP) implementations in the chip. Marvell LED driver technology, based on its own patent-pending technology, provides assurance that phase-cut, dimmable solutions based on 88EM8187 have the best performance, lowest cost and highest reliability. These IPs include innovative phased cut dimmer control algorithms, primary current sensing and control algorithms, pulse width modulation (PWM) control algorithms, fault detection and control algorithms, and thermal management algorithms. The 88EM8187 offers two different package options: SOIC-8 with Epad and SOIC-14. 88EM8187 SOIC-8 with Epad is pin-to-pin compatible with the first generation 88EM8183 supplying the smallest form factor of phase cut LED driver. The 88EM8187 SOIC-14 supports single layer PCB designs enabling low manufacturing costs. 88EM8187 TYPICAL BUCK-BOOST APPLICATIONS SCHEMATIC DIAGRAM L1 T1 LED - BR C9 R4 C4 LED + R15 R10 C4 D5 C3 PSRV 6 DIM 5 D1 7 AC RSNS R3 8 4 VDD R1 C7 R9 SW 3 D2 NTC R17 Naux Dimmer 2 R16 NC R14 R13 1 Thermal Foldback (Optional) TRIAC L2 88EM8187 Q1 Deep Dimming Level Control (Optional) R2 R6 Fig 1. 88EM8187 Typical Application Block Diagram – Phase-Cut Dimmable Single-Stage Buck-Boost (non-isolated) KEY FEATURES AND BENEFITS KEY FEATURES BENEFITS • Advanced dimming control to support all types of dimmers including leading-edge (TRIAC), trailing-edge and special (smart) dimmers •• Highest dimmer compatibility in industry - 100% compatible with wall box dimmers world wide •• Programmable dimming curve with on-chip OTP memory •• Best dimming performance - Incandescent-like dimming experience: down to 1% deep dimming, no flicker, no shimmer Marvell 88EM8187 KEY FEATURES AND BENEFITS continued KEY FEATURES BENEFITS •• Advanced dimmer load and dimming level management •• High efficiency - up to 88% with dimmer and 90% without dimmer •• Accurate primary side current regulation •• High power factor (> 0.95) •• Active power factor correction •• Low THD (<20%) and EMI •• On-chip high voltage start-up circuit •• Lowest component cost in its class - Eliminates opto-coupler and secondary feedback circuit - Eliminates startup power supply circuit - Fewest number of components and smaller size in damping and dimmer level management circuits •• Thermal foldback for improved system reliability •• Smallest driver PCB space in its class - Fits in vast majority of replacement bulb form factors - Supports single layer PCB design •• Built-in protection for open circuit, short circuit, and over-temperature •• Increased reliability due to fewer power components and less power loss •• SOIC-8-EP package •• SOIC-14-package •• Reduced design time due to high level of integration and intelligence on the chip •• Operating temperature: -40 to +105°C (Tj = 150°C max) Fig 2. 88EM8187 IC (8-pin and 14-pin) Front / Back (enlarged) Fig 3. 88EM8187 (14-pin) Buck-Boost Reference Design Front / Back (reduced) TARGET APPLICATIONS The Marvell 88EM8187 is ideally suited for the following LED lighting applications: • Retrofit A19, GU-10, Candle, PAR, and BR lamps • Downlight, recess, troffer, and panel lights • LED Driver Modules 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 (NASDAQ: MRVL) is a global leader in providing complete silicon solutions and Kinoma software enabling the “Smart Life and Smart Lifestyle.” From mobile communications to storage, cloud infrastructure, digital entertainment and in-home content delivery, Marvell’s diverse product portfolio aligns complete platform designs with industry-leading performance, security, reliability and efficiency. At the core of the world’s most powerful consumer, network and enterprise systems, Marvell empowers partners and their customers to always stand at the forefront of innovation, performance and mass appeal. By providing people around the world with mobility and ease of access to services adding value to their social, private and work lives, Marvell is committed to enhancing the human experience. As used herein, the term “Marvell” refers to Marvell Technology Group Ltd. and its subsidiaries. Marvell Semiconductor, Inc. CONTACT US: For additional information, please visit our website at www.marvell.com for a Marvell sales office or representative in your area. 5488 Marvell Lane Santa Clara, CA 95054 Phone 408.222.2500 w ww.marvell.com Copyright © 2014. 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_88EM8187_IC-02 2/14