Monolithic Power Systems Inc. EV2483DQ-00C

Overview

EV2483DQ-00C from Monolithic Power Systems is a boost-mode evaluation board for the MP2483DQ white LED driver IC, configured to drive 6–9 series LEDs at 500 mA from a 12 V input. It implements programmable-frequency, current-mode DC/DC conversion with integrated 2.5 A/55 V MOSFET, analog+PWM dimming on a single EN/Dim pin, and full fault protection including open-string and short-circuit detection.

For engineers reviewing the EV2483DQ-00C datasheet, EV2483DQ-00C schematic, EV2483DQ-00C BOM, or EV2483DQ-00C layout, this board enables rapid validation of MP2483DQ-based boost LED lighting designs requiring stable 500 mA current, thermal-safe operation, and dual-dimming interface compatibility in space-constrained applications.

Technical Context

The EV2483DQ-00C implements a fixed-boost topology using the MP2483DQ controller IC, which operates in current-mode control with adjustable switching frequency (programmable via external resistor). It supports only boost mode per board revision 1.1, with no buck or buck-boost reconfiguration possible on this hardware variant.

Input is fixed at 12 V, output delivers regulated 500 mA across 6–9 series white LEDs, with dimming controlled via the EN/Dim pin accepting either PWM signals (0.7 V low / >1.4 V high) or analog voltage (0.7–1.4 V). Protection includes cycle-by-cycle current limiting, thermal shutdown, open-string detection, and output short-circuit response.

Key Specifications

Availability

EV2483DQ-00C is available at Aetrix Electronics and suitable for LCD backlight panels, automotive interior lighting, and portable multimedia player illumination requiring stable component supply, validated reference design, and fast-turn prototyping support.

Supply support for EV2483DQ-00C 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, headquartered in Kirkland, WA, with global design and support operations.

The MP2483 product line targets high-efficiency, thermally robust LED driver applications in space-constrained portable and automotive environments, emphasizing integrated protection, dual dimming, and minimal external component count.

FAQ

What input voltage range does the EV2483DQ-00C support?

The EV2483DQ-00C is configured exclusively for 12 V input operation per its Rev. 1.1 documentation and BOM. It does not support the MP2483DQ IC's full 4.5–55 V input range - this board lacks input voltage scaling components and is fixed for 12 V boost testing only.

Can the EV2483DQ-00C be used in buck or buck-boost mode?

No. The EV2483DQ-00C is a dedicated boost-mode evaluation board. Unlike EV2483DQ-00A (buck) or EV2483DQ-00B (buck-boost), its schematic, layout, and component selection (e.g., single-output inductor, no input bypass capacitor for wide VIN) are optimized solely for boost operation.

How is LED current set on this board?

LED current is set to 500 mA by the 400 mΩ current-sense resistor (R7) and the MP2483DQ's internal 0.198 V reference voltage (I_LED = 0.198 V / 0.4 Ω = 495 mA ≈ 500 mA). No external adjustment is provided - the value is fixed by the populated R7.

Does the board support both analog and PWM dimming simultaneously?

No. The EN/Dim pin accepts either analog voltage (0.7–1.4 V) or PWM signal (with defined logic thresholds), but not both concurrently. The board's firmware-free analog front-end requires user-selected dimming method - no auto-detection or mixed-mode operation is implemented.

What protection features are active on the EV2483DQ-00C?

All MP2483DQ-integrated protections are active: cycle-by-cycle overcurrent limiting, thermal shutdown, open-string detection (via feedback loss), output short-circuit response, and input overvoltage lockout. These are hardware-enforced and require no configuration.

Is the MP2483DQ IC socketed or soldered on the board?

The MP2483DQ IC is permanently soldered in a 10-pin 3 mm × 3 mm QFN package (no socket or adapter). Rework requires QFN rework tools and thermal profiling; the IC is not field-replaceable without soldering equipment.