Monolithic Power Systems Inc. EV3383-F-00A

Overview

EV3383-F-00A from Monolithic Power Systems is an evaluation board for the MP3383 step-up WLED controller, designed to drive four independent LED strings in large LCD panel backlighting systems. It supports 6V–33V input, delivers up to 80V output, regulates up to 400mA per string with 1.8% current matching accuracy, and enables both PWM and analog dimming via dedicated ADIM/PWM terminals.

For engineers reviewing the EV3383-F-00A datasheet, EV3383-F-00A pinout, EV3383-F-00A application, or EV3383-F-00A equivalent, this board provides validated reference design, protection feature demonstration (OVP/OCP/OTP/LED open-short), and real-world startup/shutdown waveform capture under defined test conditions (VIN = 15V, 4×120mA, 14 LEDs/string).

Technical Context

The EV3383-F-00A implements the MP3383 IC in TSSOP-16EP packaging, using peak-current-mode control with externally set 250kHz switching frequency. It drives an external N-channel MOSFET (AM4490N) and Schottky diode (B290) to generate regulated boost output voltage while independently sourcing current into four LED strings via internal current sinks.

Current regulation relies on a 0.05Ω sense resistor (R5) and four matched internal current sources achieving ±1.8% inter-string accuracy. Dimming is implemented through two distinct paths: direct PWM applied to the PWM terminal, or analog dimming using a high-frequency (20kHz) PWM signal applied to the ADIM terminal - both validated with full transient waveforms in the reference documentation.

Key Specifications

Availability

EV3383-F-00A is available at Aetrix Electronics and suitable for LCD backlight validation, display subsystem prototyping, and WLED driver qualification requiring stable component supply, traceable sourcing, and documented thermal and electrical performance.

Supply support for EV3383-F-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 core expertise in DC-DC conversion, LED drivers, and motor control solutions.

The MP3383 product line targets large-panel LCD backlighting applications, delivering multi-string current regulation, high-voltage boost capability, and integrated fault protection in thermally enhanced TSSOP-16EP packaging.

FAQ

What input voltage range is supported by the EV3383-F-00A evaluation board?

The board operates with a 6V to 33V DC input supply applied between VIN and GND terminals. This range aligns with the MP3383's specified operating window and enables testing across common industrial and automotive power rails. Performance waveforms in the reference document were captured at VIN = 15V.

How do I configure PWM versus analog dimming on this board?

For PWM dimming, apply a 200Hz–20kHz PWM signal to the PWM terminal and hold ADIM at 5V. For analog dimming, apply the same PWM signal to the ADIM terminal and hold PWM at 5V. Both modes are electrically isolated and validated with full transient response data in the test report.

Does the board include all required passive components for immediate evaluation?

Yes - the bill of materials lists populated components including input/output capacitors (C2, C4, C5, C8), boost inductor (L1), Schottky diode (D1), current-sense resistor (R5), and gate-drive MOSFET (M1). NC parts (e.g., C3, C6–C7) are omitted per design; no additional assembly is needed for basic operation.

What protection features are demonstrated on the EV3383-F-00A board?

The board validates OVP, OCP, OTP, UVP, LED open/short, and inductor/diode short protections. Test waveforms in Sections 7–9 of the reference document show recovery behavior for each fault condition, including startup with one string open and shutdown during diode short events.

Can multiple EV3383-F-00A boards be synchronized for larger backlight systems?

No - the board itself is not designed for synchronization. However, the underlying MP3383 IC supports parallel operation of multiple units sharing one power source, as stated in the description. Synchronization would require external clock routing and layout coordination beyond the scope of this single-board evaluation platform.

Is the MP3383 IC on this board the GF variant in TSSOP-16EP package?

Yes - the BOM explicitly lists U1 as "MP3383GF" in "TSSOP-16EP" packaging. This matches the device marking and thermal performance requirements outlined in the MP3383 datasheet, and the exposed pad (EP) is connected to PGND on the board for optimal heat dissipation.