Monolithic Power Systems Inc. EV3310EQ-00A

Overview

EV3310EQ-00A from Monolithic Power Systems is an evaluation board for the MP3310EQ step-up white LED driver IC, designed to drive 40 total LEDs (10 in series × 4 parallel strings) at 80 mA per string with true PWM dimming, programmable switching frequency, and open-load over-voltage protection. It supports 5–25 V input and delivers up to 93% efficiency in backlighting applications.

For engineers reviewing the EV3310EQ-00A datasheet, EV3310EQ-00A pinout, EV3310EQ-00A application, or EV3310EQ-00A equivalent, this board enables rapid validation of MP3310EQ-based WLED backlight designs-including input range margining, OVP threshold calibration, PWM dimming response, and thermal behavior under 1.3 A peak inductor current.

Technical Context

The EV3310EQ-00A implements a current-mode, fixed-frequency boost converter architecture using the MP3310EQ IC in a 3×3 mm QFN-10 package. It integrates internal power MOSFETs, reference voltage, and protection circuitry including under-voltage lockout, cycle-by-cycle current limiting, and thermal shutdown.

Board-level design includes four 43 Ω droop resistors (one per string), a 22 µH power inductor rated for 1.34 A DC, and ceramic input/output capacitors optimized for low ESR and high ripple current handling across 5–25 V input operation.

Key Specifications

Availability

EV3310EQ-00A is available at Aetrix Electronics and suitable for LCD panel backlight validation, handheld device display prototyping, and digital camera illumination system development requiring stable component supply and pre-validated layout.

Supply support for EV3310EQ-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, motor drivers, and battery management solutions.

The MP3310 product line targets high-efficiency, compact-area backlight drivers for small-to-midsize LCD displays-designed for minimal external components, robust fault handling, and seamless integration into space-constrained portable systems.

FAQ

What input voltage range is supported by the EV3310EQ-00A board?

The board operates from 5 V to 25 V DC input, verified across full load conditions. For inputs below 5.5 V, jumper J1 must be shorted to enable stronger gate drive from an external source instead of the internal 5 V LDO.

How is LED current set on this evaluation board?

LED current is set by R7 (57.6 kΩ, 1%), which programs the MP3310EQ's internal current sense amplifier. With a 200 mV reference, this yields 80 mA per string (ILED = 200 mV / RSET). The board uses four identical strings, each with its own 43 Ω droop resistor.

Does the board support analog dimming or only PWM dimming?

The EV3310EQ-00A supports true PWM dimming only, implemented by applying a rectangular waveform to the EN pin. Analog dimming is not supported-the MP3310EQ does not include a DIM pin or ICTRL interface for linear current adjustment.

What protection features are implemented and how are they configured?

Over-voltage protection (OVP) is set via a resistor divider on the OVP pin (R4 = 51 kΩ); UVLO, current limiting, and thermal shutdown are internal to the MP3310EQ and require no external configuration. Open-string detection disables the IC if any string goes open-circuit.

Can the board drive fewer than 40 LEDs, and what modifications are needed?

Yes-fewer LEDs can be driven by removing unused strings and adjusting R7 to maintain target current. Reducing string count lowers output voltage demand but does not require changes to OVP or frequency-setting resistors unless operating near input limits.

Is the MP3310EQ IC on the board lead-free and RoHS-compliant?

Yes-the U1 component is labeled MP3310EQ-LF-Z, where "LF" denotes lead-free and "Z" indicates RoHS-compliant packaging. The board itself uses RoHS-compliant passives and PCB finish per MPS Rev. 1.0 documentation dated January 2010.