Monolithic Power Systems Inc. EVQ2483-Q-00A

Overview

EVQ2483-Q-00A from Monolithic Power Systems is an AEC-Q100-qualified evaluation board for the MPQ2483 55V white LED driver IC, configured in buck-boost topology, supporting 1–4 LEDs at 700 mA with 12 V input and programmable switching frequency. It integrates thermal shutdown, cycle-by-cycle current limiting, open-string protection, and combined analog/PWM dimming on a single EN/DIM pin.

For engineers reviewing the EVQ2483-Q-00A datasheet, EVQ2483-Q-00A pinout, EVQ2483-Q-00A application, or EVQ2483-Q-00A equivalent, this board enables rapid validation of MPQ2483-based automotive lighting designs requiring robust fault protection, wide-input operation (12 V), and stable 700 mA LED current across variable string voltages.

Technical Context

The EVQ2483-Q-00A implements the MPQ2483 IC in fixed buck-boost configuration with 330 kHz switching frequency, 10 µH power inductor (Wurth 744066100), and dual Schottky diodes (B360A-13-F, B160-13-F) for bidirectional energy transfer. Input range is 12 V nominal, output supports 1–4串联 white LEDs with regulated 700 mA current.

Board-level features include 0.198 V internal reference voltage, 5 µA shutdown current, 0.28 Ω internal MOSFET R_DS(on), and direct EN/DIM control enabling both analog dimming (0.7–1.4 V) and PWM dimming (logic-high >1.4 V, logic-low <0.7 V).

Key Specifications

Availability

EVQ2483-Q-00A is available at Aetrix Electronics and suitable for automotive lighting validation, LCD backlight prototyping, and industrial LED illumination development requiring stable component supply, AEC-Q100-compliant reference hardware, and fast-turn PCB-based functional verification.

Supply support for EVQ2483-Q-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 design centers in the US, China, and Taiwan, and global distribution through authorized partners.

The MPQ2483 product line targets automotive-grade LED drivers requiring wide-input operation (4.5–55 V), integrated fault protection, and flexible dimming-designed specifically for headlamp, DRL, and interior lighting systems meeting AEC-Q100 Grade 1 requirements.

FAQ

What input voltage range is supported on the EVQ2483-Q-00A?

The board is validated for 12 V input per the demo board table and test results, with MPQ2483 IC capable of 4.5–55 V. Operation outside 12 V requires reconfiguration of feedback and compensation components per MPQ2483 datasheet Section 8.2. No factory calibration or firmware is involved - it is a passive hardware platform.

Can the EVQ2483-Q-00A drive more than four LEDs?

No - the board layout and component selection (including inductor saturation current and diode ratings) are optimized for up to four 3.2 V white LEDs (max ~12.8 V string). Driving six LEDs (as in EVQ2483-Q-00C) requires different board revision and component values; this board's schematic and BOM do not support >4 LED strings.

How is dimming implemented on this evaluation board?

Dimming uses the MPQ2483's dual-mode EN/DIM pin: analog dimming applies 0.7–1.4 V DC to set average current proportionally; PWM dimming applies logic-level pulses where duty cycle controls brightness. Thresholds are hard-coded in the IC - no external circuitry or configuration registers are required.

Does the board include thermal monitoring or reporting?

No - the board implements MPQ2483's internal thermal shutdown (150 °C junction limit) but provides no temperature sensor, analog output, or digital interface for real-time thermal telemetry. Thermal protection is automatic and non-latching; recovery occurs after cooldown.

Is the EVQ2483-Q-00A RoHS and lead-free compliant?

Yes - all components listed in the Bill of Materials (including MPQ2483DQ QFN10 package, Murata/ Panasonic capacitors, Wurth inductor, Diodes Inc. Schottky diodes) are RoHS-compliant and lead-free per MPS public declarations and manufacturer P/N cross-references.

Can I use this board for step-down (buck) or step-up (boost) testing?

No - EVQ2483-Q-00A is fixed for buck-boost operation only, as confirmed by JP1 jumper position (open) and schematic topology. For buck-only testing, use EVQ2483-Q-00B; for boost-only, use EVQ2483-Q-00C. Board-level routing and component values are not interchangeable across variants.