Monolithic Power Systems Inc. EV3383-S-00A

Overview

EV3383-S-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP3383 step-up WLED controller, a 4-string, peak-current-mode DC/DC boost controller supporting up to 400mA per string and 80V maximum output voltage in SOIC-16 packaging. It enables large LCD panel backlighting with precise current matching (±1.8%), PWM/analog dimming, and full fault protection including LED open/short, OVP, UVP, OTP, and inductor/diode short detection.

For engineers reviewing the EV3383-S-00A datasheet, EV3383-S-00A pinout, EV3383-S-00A application, or EV3383-S-00A equivalent, this board provides validated reference design, quick-start configuration guidance, and real-world test waveforms for WLED boost topology validation under VIN = 6–33V, fSW = 250kHz, and multi-string current regulation.

Technical Context

The EV3383-S-00A implements the MP3383 IC in a fully assembled, tested layout with external MOSFET (AM4490N), Schottky diode (B290), and 33µH power inductor. It supports dual dimming modes: direct PWM input at 200Hz–20kHz and analog dimming via ADIM pin using PWM-derived DC level, both enabling linear ILED control from 0.1% to 100% duty cycle.

Board-level protections mirror MP3383's internal features: over-voltage lockout triggered at VOUT > 80V, under-voltage shutdown below VIN < 6V, thermal shutdown at TJ > 150°C, and cycle-by-cycle over-current limiting on gate drive and sense paths. All four LED string outputs are independently monitored with dedicated ISENSE feedback paths.

Key Specifications

Availability

EV3383-S-00A is available at Aetrix Electronics and suitable for LCD backlight development, display module qualification, and LED driver reference design validation requiring stable component supply, rapid prototyping turnaround, and production-ready schematics.

Supply support for EV3383-S-00A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with expertise in DC/DC converters, LED drivers, motor drivers, and battery management solutions.

The MP3383 product line targets large-format LCD backlighting applications, delivering high-efficiency, multi-string current regulation with integrated protection and flexible dimming-optimized for thin, energy-efficient displays in commercial and industrial monitors.

FAQ

What input voltage range does the EV3383-S-00A support?

The board operates with a DC input voltage between 6V and 33V applied across VIN and GND terminals. This matches the MP3383's native operating range and supports common industrial power rails, including 12V and 24V systems. Operation outside this range may trigger UVP or OVP protection.

How do I enable PWM dimming on this evaluation board?

Apply a 5V logic signal to the EN terminal to power up the board, then connect a PWM signal (200Hz–20kHz, 0.1%–100% duty) to the PWM terminal while holding ADIM at 5V. The MP3383 interprets this as direct PWM dimming, modulating LED current synchronously with the input waveform.

Can the EV3383-S-00A drive more than four LED strings?

No-the board is configured for exactly four LED strings (LED1–LED4). However, the underlying MP3383 IC supports parallel operation: two or more MP3383 devices can share one boost stage and synchronize via external clock or resistor-programmed fSW to scale to eight or more strings.

What protection features are demonstrated on this board?

All MP3383-integrated protections are active and testable: over-voltage (OVP at >80V), under-voltage (UVP at <6V), over-temperature (OTP at >150°C), LED open/short, inductor short, diode short, and cycle-by-cycle over-current. Test waveforms in the user guide validate each response.

Is the MP3383GS-Z IC socketed or soldered on the EV3383-S-00A?

The MP3383GS-Z is permanently soldered in SOIC-16 footprint (U1) on the board. It is not socketed. Replacement requires rework with hot-air station and SOIC-16-compatible desoldering tools; no zero-insertion-force (ZIF) socket is provided.

Does the board include ESD protection on interface pins?

No discrete ESD protection devices are included on EN, PWM, ADIM, or LED terminals. The MP3383 itself integrates Class 2 HBM ESD tolerance (±2kV) on digital pins, but external TVS diodes are recommended for system-level robustness in production environments.