Marvell 88EM8187

Marvell 88EM8187
Shimmerless, Deep Dimming Single-Stage AC/DC LED Driver IC
for Replacement Offline 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 chip provides premium dimming performance with the
highest level of compatibility and shimmerless dimming down to 1%. Bill of material costs are significantly reduced as fewer and
smaller components are required in EMI, damping and dimming level control circuits. Most importantly, 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 IP 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 enabling the digital
connected 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.
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Santa Clara, CA 95054
Phone 408.222.2500
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