88EM8042A1-SAG2C000-T Marvell, 88EM8042A1-SAG2C000-T Datasheet

88EM8042A1-SAG2C000-T

Manufacturer Part Number

88EM8042A1-SAG2C000-T

Description

88EM8042 Series - AC/DC PFC Fly-back LED Controller - 8-Pin SOIC

Manufacturer

Marvell

Datasheet

1.88EM8042A1-SAG2C000-T.pdf (2 pages)

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Marvell 88EM8042

Single-Stage AC-DC LED Constant Voltage Controller

PRODUCT OVERVIEW

The Marvell

for offline power supply controllers. The Marvell 88EM8042 employs secondary side sensing for isolation and accurate

current regulation. The IC supports universal input voltage.

Through Marvell’s innovative mixed-signal technology, the Marvell 88EM8042 is able to deliver high efficiency, high

power factor and low total harmonic distortion and good noise immunity. The high level of integration reduces system

costs and the small package size saves board space.

The Marvell 88EM8042 uses Average Current Mode Control (ACMC) for Power Factor Correction (PFC) and the

adaptive loop control achieves high power factor for a wide range of voltages and low load conditions. Working

at a fixed frequency, the IC controls the application flyback circuit under Continuous Conduction Mode (CCM),

Discontinuous Conduction Mode (DCM) or both combined together operating in mixed mode.

The Marvell 88EM8042 may be also used as the AC/DC stage in the design of a two-stage LED External Driver in

conjunction with the Marvell 88EM8801, dual-string intelligent PWM Dimming DC/DC Buck LED driver. External two-

stage LED driver reference designs that feature the Marvell 88EM8042 and Marvell 88EM8081 are available in 20-Watt

and 40-Watt versions. Refer to the Marvell External LED Driver Reference Designs Product Brief for more details.

TARGET APPLICATIONS

The Marvell 88EM8042 is ideally suited for the following LED lighting applications:

•

MARVELL 88EM8042 SYSTEM SCHEMATIC DIAGRAM

First stage of two-stage external LED drivers

AC-DC off line power supply

Universal input AC-DC adaptor

Retifier

Bridge

diode

88EM8042 chip is a high-performance single-stage AC/DC constant voltage flyback controller designed

Fig 1. Marvell 88EM8042 AC-DC Power Factor Correction Flyback Controller Circuit Diagram

DC in

PFC

VDD

ISNS

VIN

VDD

OCP

88EM8042

MARVELL

sen

gate

GND

Drain

Opto-Coupler

ref

Load

out

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88EM8042A1-SAG2C000-T Summary of contents

Page 1

... IC controls the application flyback circuit under Continuous Conduction Mode (CCM), Discontinuous Conduction Mode (DCM) or both combined together operating in mixed mode. The Marvell 88EM8042 may be also used as the AC/DC stage in the design of a two-stage LED External Driver in conjunction with the Marvell 88EM8801, dual-string intelligent PWM Dimming DC/DC Buck LED driver. External two- stage LED driver reference designs that feature the Marvell 88EM8042 and Marvell 88EM8081 are available in 20-Watt and 40-Watt versions ...

Page 2

... 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 ...

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