Monolithic Power Systems Inc. EV3302-J-01A

Overview

EV3302-J-01A from Monolithic Power Systems is a fully assembled and tested evaluation board for the MP3302 white LED driver IC, configured to drive 3-series × 9-parallel white LEDs (27 total) from a 3.3–6 V single-cell Li-ion input. It implements fixed-frequency current-mode step-up conversion with 195 mV feedback voltage, open-circuit shutdown, and thermal/UVLO/current-limit protection.

For engineers reviewing the EV3302-J-01A datasheet, EV3302-J-01A pinout, EV3302-J-01A application, or EV3302-J-01A equivalent, this board enables rapid validation of MP3302-based LED backlighting in compact portable devices requiring precise constant-current drive, analog/PWM dimming control, and high-efficiency boost operation under battery-voltage constraints.

Technical Context

The EV3302-J-01A implements the MP3302's fixed-frequency (1.3 MHz typical) current-mode boost architecture on a 4.6 cm × 4.6 cm PCB, using a 4.7 µH power inductor, dual 4.7 µF/16 V input capacitors, and 30 Ω current-setting resistors per string to deliver up to 1.3 A total output current at >87% peak efficiency.

It supports three dimming modes: enable/disable via EN pin (1.5–6 V logic high), analog dimming (0.7–1.4 V EN voltage), and PWM dimming (100 Hz–1 kHz, 0.5 V low / >1.5 V high), with built-in overvoltage shutdown triggered by open-LED detection and thermal foldback activated above safe junction temperature.

Key Specifications

Availability

EV3302-J-01A is available at Aetrix Electronics and suitable for cell phone backlighting, digital still camera flash modules, and small LCD display illumination requiring stable component supply, pre-validated reference design, and fast-turn evaluation of high-efficiency white LED drivers.

Supply support for EV3302-J-01A 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 EV3302-J-01A belongs to MPS's LED Driver Evaluation Board product line, designed specifically to accelerate development of energy-efficient, space-constrained backlighting and flash applications for portable consumer electronics.

FAQ

What input voltage range does the EV3302-J-01A support?

The board accepts 3.3 V to 6 V DC input, matching the operational range of single-cell lithium-ion batteries across full charge to cutoff. This eliminates need for pre-regulation and ensures consistent LED current regulation throughout battery discharge, verified with 4.2 V nominal testing per the Rev. 1.0 schematic and efficiency curve.

How is LED current set on this evaluation board?

LED current is set by two 30 Ω, 1% surface-mount resistors (R3 and R4) connected to the FB pin of the MP3302DJ IC. With the IC's 195 mV feedback reference, each resistor establishes ~6.5 mA per string; combined across nine parallel strings, total output current reaches 1.3 A as confirmed in the Bill of Materials and Quick Start Guide.

Does the EV3302-J-01A support both analog and PWM dimming?

Yes - analog dimming is implemented by applying 0.7 V to 1.4 V to the EN pin, linearly scaling output current; PWM dimming uses a 100 Hz–1 kHz square wave with low <0.5 V and high >1.5 V thresholds. Both methods are validated in the Quick Start Guide and preserve constant-current regulation during active dimming cycles.

What protection features are implemented on the board?

The board inherits all MP3302DJ protections: overvoltage shutdown (triggered by open-LED condition), under-voltage lockout (UVLO below ~2.7 V), cycle-by-cycle current limiting, and thermal overload foldback. These are active at IC level and require no external components, as documented in the DESCRIPTION section and schematic.

Is the EV3302-J-01A fully assembled and ready for testing?

Yes - the board is shipped fully assembled and factory-tested, including all passive components (C1–C4, L1, R1–R4), the MP3302DJ IC in TSOT23-5 package, Schottky diode D1 (B160), and JST connector CN1. No soldering or component placement is required before powering and validating LED drive performance.