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EV3378E-F-00A Datasheet(PDF) 1 Page - Monolithic Power Systems |
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EV3378E-F-00A Datasheet(HTML) 1 Page - Monolithic Power Systems |
1 / 8 page 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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