Monolithic Power Systems Inc. EV3021DQ-00A

Overview

EV3021DQ-00A from Monolithic Power Systems is an evaluation board for the MP3021DQ white LED backlight driver IC, supporting up to 4 WLEDs at 30mA each with 1x/1.5x/2x auto-adjust charge pump operation, 5-bit + 1-bit brightness control, and MPC single-wire serial interface - used for rapid prototyping of mobile display backlight systems.

For engineers reviewing the EV3021DQ-00A datasheet, EV3021DQ-00A pinout, EV3021DQ-00A application, or EV3021DQ-00A equivalent, this board enables functional validation of MP3021DQ's charge pump efficiency, thermal shutdown behavior, soft-start sequencing, and MPC bus timing in real-world handheld display power architectures.

Technical Context

The EV3021DQ-00A implements a complete reference design around the MP3021DQ IC, integrating its 3mm × 3mm QFN-16 package, four 1µF X7R ceramic input/output capacitors, precision current-setting resistors (4.22kΩ, 0Ω), and discrete DIP switch (SW3) and push-button controls for LED count selection and brightness adjustment.

It embeds a PIC12F675 microcontroller (SO-8) to generate MPC protocol commands and manage user inputs, enabling full register access to the MP3021DQ's 5-bit brightness control, mode configuration, and enable/disable states without external host controller dependency.

Key Specifications

Availability

EV3021DQ-00A is available at Aetrix Electronics and suitable for backlight validation, portable display qualification, and LED driver IC interoperability testing requiring stable component supply and documented reference schematics.

Supply support for EV3021DQ-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 MP3021 product line targets compact, high-efficiency backlight power for mobile displays, emphasizing inductorless charge pump architecture, minimal external components, and integrated protection features for space-constrained consumer electronics.

FAQ

What is the primary function of the EV3021DQ-00A evaluation board?

The EV3021DQ-00A is a dedicated hardware platform for evaluating the MP3021DQ white LED driver IC. It provides immediate operational verification of charge pump efficiency, brightness control resolution, thermal shutdown response, and MPC serial command execution - all without custom PCB development.

Does the board include populated LEDs?

No - LED1 through LED4 are marked as "No Stuff" in the Bill of Materials. Users must solder their own white LEDs matching the MP3021DQ's forward voltage range (typically 3.0–3.6 V per LED) to validate full 4-LED operation and current regulation accuracy.

How is brightness controlled on this evaluation board?

Brightness is adjusted via two tactile push-buttons ("BRT UP" and "BRT DOWN") that send MPC commands to the MP3021DQ. Each press increments or decrements the 5-bit + 1-bit brightness register, enabling discrete 33-level dimming with real-time visual feedback on connected LEDs.

What microcontroller is used for MPC protocol generation?

A Microchip PIC12F675 (SO-8 package) generates timed MPC serial pulses and interprets DIP switch (SW3) settings to configure LED count (1–4) and initialize default brightness level - eliminating need for external host MCU during basic evaluation.

Is the EV3021DQ-00A recommended for new designs?

No - the documentation explicitly states "NOT RECOMMENDED FOR NEW DESIGNS, REFER TO EV3320A-Q-00A". This reflects MPS's product lifecycle transition; EV3021DQ-00A remains valid for legacy support and technical comparison but lacks long-term supply assurance.

Can the board operate without the PIC12F675 firmware?

Yes - the MPC interface is accessible via test points (VIN, GND, MPC_DATA). Users may bypass the onboard PIC and drive the MP3021DQ directly using an external microcontroller or logic analyzer, provided MPC timing specifications (min 1 µs pulse width, 10 µs inter-bit gap) are met.