Monolithic Power Systems Inc. EV3304DD-00A

Overview

EV3304DD-00A from Monolithic Power Systems is a fully assembled and tested evaluation board for the MP3304CDD monolithic step-up white LED driver IC, designed to drive 30 white LEDs (3-series × 10-parallel strings) at 200 mA total output current from a 5 V input. It implements fixed-frequency current-mode control, features 200 mV feedback voltage, open-load shutdown, and supports true PWM dimming up to 50 kHz.

For engineers reviewing the EV3304DD-00A datasheet, EV3304DD-00A pinout, EV3304DD-00A application, or EV3304DD-00A equivalent, this board enables rapid validation of MP3304CDD-based backlighting designs for small LCD displays, handheld devices, and camera modules - with emphasis on efficiency, thermal safety, and noise-free dimming performance.

Technical Context

The EV3304DD-00A implements the MP3304CDD's fixed-frequency (not specified in Hz but confirmed as constant-frequency operation per datasheet) current-mode boost architecture, using an external 1 Ω sense resistor (R3) to regulate LED current at 200 mA. It integrates under-voltage lockout, cycle-by-cycle current limiting, and thermal overload protection.

Board-level design includes a 2 µH power inductor (L1), dual 4.7 µF/16 V input capacitors (C1, C2), 2.2 µF/25 V output capacitor (C5), and B0530 Schottky diode (D1); layout supports 1.3 A peak switch current and achieves up to 88% efficiency at 5 V input driving 3×10 WLED strings.

Key Specifications

Availability

EV3304DD-00A is available at Aetrix Electronics and suitable for backlight evaluation, portable display prototyping, and LED driver qualification requiring stable component supply, pre-validated reference design, and fast-turn engineering validation cycles.

Supply support for EV3304DD-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, and motor control solutions.

The MP3304 product line targets compact, high-efficiency backlight drivers for space-constrained portable electronics, emphasizing low feedback voltage, integrated protection, and noise-immune PWM dimming for consumer imaging and mobile display applications.

FAQ

What input voltage range does the EV3304DD-00A support?

The board is optimized for 5 V input, compatible with single-cell lithium-ion batteries or regulated 5 V supplies. The underlying MP3304CDD IC operates within a 2.5 V to 6 V range, but the EV3304DD-00A layout and component selection (e.g., 16 V input capacitors) are validated specifically at 5 V for 3×10 WLED operation.

How is LED current set on this evaluation board?

LED current is set by R3 - a 1 Ω, 1%, 0805 resistor connected between the ISET pin and GND of the MP3304CDD. With the IC's 200 mV current-sense reference, this yields 200 mA total output current (ILED = 0.2 V / 1 Ω). No trimming or recalibration is required for nominal operation.

Can the EV3304DD-00A drive fewer than 30 LEDs?

Yes - the board supports reduced LED loads. For example, removing parallel strings while maintaining ≥3 LEDs in series preserves regulation, but efficiency and thermal behavior shift. Open-circuit detection will shut down the converter if all strings are disconnected, preventing overvoltage damage to the IC or LEDs.

What is the role of the EN pin during PWM dimming?

The EN pin serves as the direct PWM interface: applying a rectangular waveform (0.5–5 V swing, 250 Hz–50 kHz) toggles the MP3304CDD between full-on and shutdown states, enabling precise luminance control without color shift. This method avoids analog dimming inaccuracies and eliminates audible coil whine associated with low-frequency modulation.

Does the board include thermal protection circuitry?

Yes - the MP3304CDD IC embedded on the board includes internal thermal overload protection that disables switching when junction temperature exceeds safe limits. The board's 2-layer PCB layout, exposed thermal pad under U1 (MP3304CDD QFN8), and minimal copper isolation support heat dissipation during sustained 200 mA operation.

Is the EV3304DD-00A RoHS compliant and lead-free?

Yes - all components listed in the Bill of Materials (including MP3304CDD-LF-Z, GRM series capacitors, B0530W diode, and D53LC inductor) are RoHS-compliant and lead-free. The board itself carries no exemption markings and meets MPS's standard environmental compliance requirements per Rev. 1.0 documentation.