Monolithic Power Systems Inc. EV3204DJ-00A

Overview

EV3204DJ-00A from Monolithic Power Systems is an evaluation board for the MP3204DJ fixed-frequency white LED driver IC, designed to drive up to 5 series white LEDs from a 2.5–6 V input (e.g., single-cell Li-ion). It implements current-mode step-up conversion with 1 MHz switching frequency, 104 mV feedback voltage, open-load shutdown via OV pin, and integrated thermal/UVLO/current-limit protection.

For engineers reviewing the EV3204DJ-00A datasheet, EV3204DJ-00A pinout, EV3204DJ-00A application, or EV3204DJ-00A equivalent, this board enables rapid validation of LED current regulation accuracy, efficiency vs. load count (3–5 LEDs), PWM dimming response, and fault behavior under open-circuit or overvoltage conditions.

Technical Context

The EV3204DJ-00A is a fully assembled, tested PCB implementing the MP3204DJ TSOT23-6 IC in a boost topology with external 22 µH inductor (Toko 984FB-220M), 2.2 µF/10 V input capacitor (TDK C2012X5R1A225K), and 0.22 µF/25 V output capacitor (TDK C2012X7R1E224K). Schottky diode B0530WS-7 provides low-loss rectification.

It supports both DC enable control and PWM-driven brightness adjustment via the EN pin, with soft-start functionality preventing inrush current. The board accepts standard 0805 passives and includes footprint for five parallel LED positions (LED1–LED5), though unpopulated by default.

Key Specifications

Availability

EV3204DJ-00A is available at Aetrix Electronics and suitable for LED backlight validation, portable display power design, and handheld device lighting qualification requiring stable component supply and pre-verified layout implementation.

Supply support for EV3204DJ-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 analog and power ICs, with core expertise in DC/DC conversion, LED drivers, motor drivers, and battery management solutions.

The MP3204 product line delivers highly integrated, thermally robust white LED drivers for space-constrained portable applications, emphasizing efficiency, reliability, and ease of system integration.

FAQ

What is the purpose of the EV3204DJ-00A evaluation board?

This board is a functional reference design for the MP3204DJ LED driver IC. It allows engineers to verify LED current regulation accuracy, efficiency across varying LED counts (3–5), thermal performance under load, and response to open-circuit faults - all using production-grade components and layout.

Can the EV3204DJ-00A drive more than five white LEDs?

No. The board and underlying MP3204DJ IC are rated for up to five series white LEDs. Driving more would exceed the 28 V maximum output voltage limit and risk OV pin activation or reduced regulation accuracy due to increased forward voltage drop.

How is brightness controlled on this evaluation board?

Brightness is controlled via the EN pin: applying a logic-high DC signal enables steady-state operation; applying a PWM signal (100 Hz–20 kHz) enables analog-equivalent dimming without LED color shift or audible noise, leveraging the IC's built-in soft-start.

What protection features are implemented and how are they verified?

The board demonstrates OV shutdown (via dedicated OV pin monitoring), UVLO (2.3 V threshold), thermal shutdown (>150°C junction), and cycle-by-cycle current limiting. These are observable through output disable events during open-LED tests, input brownout, or sustained overload with IR imaging.

Is the MP3204DJ IC soldered directly onto the EV3204DJ-00A board?

Yes. U1 is the MP3204DJ in TSOT23-6 package, factory-soldered and functionally tested. The board uses standard reflow-compatible footprints and includes silk-screened pin-1 indicator and polarity markings for all passive components.

Does the board include populated LEDs?

No. LED1 through LED5 footprints are provided but left unpopulated per default configuration. Users must solder their selected white LEDs (forward voltage ≤ 3.6 V each) to validate specific lighting requirements and thermal behavior.