Monolithic Power Systems Inc. EV6519-Q-00A

Overview

EV6519-Q-00A from Monolithic Power Systems is an evaluation board for the MP6519 monolithic step-down current-source H-bridge driver IC, supporting 2.5–28V input and delivering up to 5A regulated output current with ±2% full-scale accuracy, 65mΩ R_DS(ON) per MOSFET, and programmable 30–300kHz switching frequency. It enables rapid validation of bidirectional DC motor and solenoid current regulation in industrial motion control systems.

For engineers reviewing the EV6519-Q-00A datasheet, EV6519-Q-00A pinout, EV6519-Q-00A application, or EV6519-Q-00A equivalent, this board provides verified hardware reference for MP6519-based current-regulated H-bridge designs, including MODE polarity control, PWM current scaling (20–100kHz), and integrated OCP/OTP/OVP/open-load protection.

Technical Context

The EV6519-Q-00A implements a fully assembled, tested reference design for the MP6519GQ QFN-19 (3mm×3mm) current-regulator IC, integrating four internal MOSFETs in an H-bridge topology with synchronous rectification. Its control architecture accepts external PWM (20–100kHz) for precise current scaling and uses MODE pin logic (high/low) to select forward/reverse current direction.

Board-level protection includes open-load detection, cycle-by-cycle overcurrent protection (OCP), thermal shutdown (OTP), overvoltage protection (OVP), and fault reporting via open-drain FT pin with onboard 10kΩ pull-up. Input filtering uses 100μF electrolytic (C1/C5) and multiple 100nF/4.7μF ceramic capacitors across VIN/GND planes.

Key Specifications

Availability

EV6519-Q-00A is available at Aetrix Electronics and suitable for industrial motion control, precision solenoid actuation, and bidirectional DC motor current regulation requiring stable component supply, fast prototyping turnaround, and production-ready reference validation.

Supply support for EV6519-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 core expertise in DC-DC conversion, motor drivers, and battery management solutions.

The MP6519 product line targets high-accuracy, high-efficiency current-regulated H-bridge applications in industrial automation, robotics, and precision electromechanical systems-designed to replace discrete MOSFET + controller implementations with single-chip integration.

FAQ

What is the primary function of the EV6519-Q-00A evaluation board?

The EV6519-Q-00A is a fully assembled hardware platform for evaluating the MP6519 current-regulated H-bridge driver IC. It enables functional verification of bidirectional current control, PWM-based current scaling, polarity selection via MODE pin, and integrated protection features-including OCP, OTP, OVP, and open-load detection-under real-world 2.5–28V input conditions.

How is output current polarity controlled on this board?

Current polarity is controlled by the MODE pin: applying logic high selects forward current flow (LP → LN), while logic low selects reverse flow (LN → LP). The board defaults to MODE = high, enabling forward operation without external configuration. This matches the MP6519's internal H-bridge gate drive sequencing for directional control.

What does the FT pin indicate, and how is it implemented?

The FT (Fault) pin is an open-drain output that asserts low during overtemperature (OTP) or overcurrent (OCP) events. It includes an onboard 10kΩ pull-up resistor to VIN, simplifying fault monitoring with microcontroller GPIOs. No external pull-up is required, and the pin remains high during normal operation.

Can the full-scale current be adjusted, and if so, how?

Yes. Full-scale current is set by the value of R11 (50mΩ, 3720 package), which serves as the current-sense resistor. Changing R11 alters the reference voltage into the MP6519's error amplifier, directly scaling the maximum regulated output current. The board supports rework of R11 for custom current ranges within device limits.

What are the key PCB layout features supporting high-current operation?

The board uses 2oz copper layers, thick power traces for VIN/GND/LP/LN paths, and strategic placement of bulk (100μF) and high-frequency (100nF, 4.7μF) capacitors near U1. The MP6519GQ QFN-19 package is thermally anchored to internal copper planes, and test points (AGND, PWM, MODE, EN, FT) enable non-invasive signal probing without soldering.

Is the EV6519-Q-00A RoHS-compliant and lead-free?

Yes. All components on the EV6519-Q-00A-including the MP6519GQ IC, capacitors, resistors, and connectors-are lead-free, halogen-free, and compliant with the EU RoHS directive. MPS confirms green status for this part family on its official Quality Assurance portal.