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EV3378E-F-00A Datasheet(PDF) 1 Page - Monolithic Power Systems

Part # EV3378E-F-00A
Description  4-Channel WLED Controller With High-Efficiency Buck Converter Evalution Board
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

EV3378E-F-00A Datasheet(HTML) 1 Page - Monolithic Power Systems

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EV3378E-F-00A
4-Channel WLED Controller
With High-Efficiency Buck Converter
Evalution Board
PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE
EV3378E-F-00A Rev.1.0
www.MonolithicPower.com
1
2/17/2016
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
Preliminary Specifications Subject to Change
© 2016 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP3378E is a one-chip solution specially
designed
for
monitor
applications.
The
MP3378E includes a step-up WLED controller
with four current channels for backlighting, and
a high efficiency buck converter for internal bus
voltage or standby power.
The 4-string WLED controller drives an external
MOSFET to boost up the output voltage from
the input supply. It regulates the current in each
LED string to the programmed value set by an
external current setting resistor. It supports both
analog and PWM dimming independently to
meet special dimming mode request. Full
protection features for the WLED controller
include OCP, OTP, UVP, OVP, LED short/open
protection, inductor/diode short protection.
The high-efficiency buck converter operates in
the current mode operation with a built-in
MOSFET and a built-in synchronous rectifier. It
offers a very compact solution to achieve
excellent
load
and
line
regulation.
Full
protection features for the buck converter
include OCP and thermal shutdown.
The MP3378E is available in a TSSOP-28EP
package.
ELECTRICAL SPECIFICATIONS
Parameter
Symbol
Value
Units
Input
Voltage
VIN
8– 24
V
LEDs #
4 LED strings
10 LEDs/string
LED Current
ILED
120/string
mA
IOUT Current
(buck)
IOUT
2
A
FEATURES
WLED Driver:
• 4-String,
Max
350mA/String,
WLED
Controller
• Up to 24V Input Voltage Range
• 2.5% Current Matching Accuracy
• Programmable Switching Frequency
• PWM and Analog Dimming Mode
• LED Open and Short Protection
• Programmable Over-Voltage Protection
• Recoverable Thermal Shutdown Protection
• Over-Current Protection
• Over-Temperature Protection
• Inductor/Diode short Protection
Buck Converter:
• 144mΩ/58mΩ Low RDS(on) Internal Power
MOSFETs
• Low Quiescent Current
• Fixed 235kHz Switching Frequency
• Frequency Sync from 250kHz to 2MHz
External Clock
• Internal Soft Start
• OCP and Hiccup Mode
• Over-Temperature Protection
• Output Adjustable from 0.8V
APPLICATIONS
• Desktop LCD Flat Panel Displays
• Flat Panel Video Displays
• 2D/3D LCD TVs and Monitors
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.


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