Monolithic Power Systems Inc. EVQ3362-J-00A

Overview

EVQ3362-J-00A from Monolithic Power Systems is an evaluation board for the MPQ3362GJ, a single-string boost white LED driver IC supporting 3V to 36V input, up to 36V output, 200mA LED current, and AEC-Q100 Grade 1 qualification-designed for automotive display backlighting with analog/PWM dimming on one pin.

For engineers reviewing the EVQ3362-J-00A datasheet, EVQ3362-J-00A pinout, EVQ3362-J-00A application, or EVQ3362-J-00A equivalent, this board enables rapid validation of MPQ3362-based WLED driver designs under real-world conditions including UVLO, thermal shutdown, open/short LED protection, and dimming mode switching.

Technical Context

The EVQ3362-J-00A implements a non-synchronized boost topology using the MPQ3362GJ IC in TSOT23-8 package, with external 4.7μH inductor (DR1050-4R7), B260A Schottky diode, and 1Ω current-sense resistor to deliver regulated 200mA to a single LED string up to 36V.

It supports dual dimming modes: PWM dimming below 2kHz and analog dimming above 5kHz on the EN/DIM pin, while incorporating cycle-by-cycle current limiting, soft start, and OVP via dedicated FB and OVP pins-enabling robust testing of fault response and loop stability across 3–36V input range.

Key Specifications

Availability

EVQ3362-J-00A is available at Aetrix Electronics and suitable for automotive display backlighting, medium-sized LCD backlighting, and general lighting applications requiring stable component supply, AEC-Q100-compliant reference validation, and fast-turn prototyping support.

Supply support for EVQ3362-J-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 design focus on efficiency, integration, and reliability for automotive, industrial, and consumer applications.

The MPQ3362 product line delivers AEC-Q100 Grade 1 qualified boost LED drivers optimized for automotive interior lighting and display backlighting, emphasizing low feedback voltage (200mV), wide input range, and dual-dimming flexibility.

FAQ

What is the primary function of the EVQ3362-J-00A evaluation board?

The EVQ3362-J-00A is a fully assembled, tested evaluation platform for the MPQ3362GJ boost LED driver IC. It enables engineers to validate performance-including efficiency, dimming behavior, fault protection, and loop stability-under real operating conditions before integrating the IC into final designs.

Does the board support both analog and PWM dimming simultaneously?

No-it supports either analog or PWM dimming, selected automatically by input frequency on the EN/DIM pin: signals below 2kHz trigger PWM dimming, while those above 5kHz initiate analog dimming. The board does not allow concurrent operation of both modes.

What protection features are implemented and how are they verified on this board?

The board demonstrates UVLO (shuts down below ~2.5V VIN), thermal shutdown (via internal IC sensor), open/short LED detection (using FB and OVP pins), and cycle-by-cycle current limiting. These are verified through oscilloscope waveforms in the official test report, including inductor short recovery and OVP during normal operation.

Can the EVQ3362-J-00A drive multiple LED strings?

No-it is configured for a single LED string only, as confirmed by schematic (one LED+ and LED− pair), BOM (single current-sense resistor R5), and documentation stating "single-string boost LED driver." Driving multiple strings requires separate boards or redesign with current-sharing circuitry.

Is the MPQ3362GJ IC on this board pin-compatible with other MPS LED drivers?

No documented pin compatibility exists between MPQ3362GJ (TSOT23-8) and other MPS boost LED drivers like MPQ3367 or MPQ3369-their pinouts differ in function assignment (e.g., SYNC, OVP, COMP placement), and datasheets do not list them as drop-in replacements.

What external components must be changed to adjust output current or voltage?

Output current is set by R5 (1Ω); replacing it changes ILED proportionally. Output voltage is determined by LED string forward voltage-not directly adjustable via resistors-but maximum VOUT is limited by the 40V rating of the B260A diode and internal OVP threshold. No feedback resistor divider is present; regulation is current-based.