Monolithic Power Systems EV3391EF-00A

Description

The EV3391EF-00A is an evaluation board for the MP3391EF, a step-up converter designed for large liquid-crystal displays that employ anarray of LEDs as the light source. It can drive up to 8 WLED strings in parallel with 80mA maximum current.

The MP3391 uses external power MOSFET and internal current mode, fixed frequency architecture and includes current ballast in each string terminal, which achieves 2.5% current regulation accuracy between strings. Lowfeedback voltage at each LED string help reduce power loss and improve efficiency.

The MP3391 is flexible for extending LED channels with two or more MP3391s in parallel.

The MP3391 has multiple features to protect the converter from fault conditions, including under-voltage lockout, current limiting, overvoltage, short LED, open LED and thermal shut-down protection.

Features

• • 10V to 28V Input Voltage Range
• • External Power MOSFET
• • Up to 90% Efficiency
• • Programmable Over Voltage Protection
• • Drives up to 8 Strings Parallel 2.5% Current Regulation Accuracy Between Strings
• • Programmable Switching Frequency:
• • PWM or DC Input Burst PWM Dimming
• • Open and Short LED Load Protection
• • Thermal Shutdown
• • Flexible Extended Channels Applications

Typical applications

• Notebook PC
• LCD Monitor
• Automotive Systems and Tablet Computer
• LCD TV
• Handy Terminals Display

More information

• Datasheet
• IC product information