Monolithic Power Systems Inc. EV6619-Q-00A

Overview

EV6619-Q-00A from Monolithic Power Systems is an evaluation board for the MP6619 H-bridge motor driver IC, supporting 5.4V–28V input voltage and delivering up to 5A peak motor current with cycle-by-cycle current regulation. It features full protection (OCP/OVP/OTP/UVLO), 65mΩ R_DS(ON) per MOSFET, and 100% duty-cycle operation-designed for rapid prototyping of brushed DC motor control in industrial actuators and precision motion systems.

For engineers reviewing the EV6619-Q-00A datasheet, EV6619-Q-00A pinout, EV6619-Q-00A application, or EV6619-Q-00A equivalent, this board enables immediate validation of MP6619's current-limiting behavior, fault response timing, thermal performance under load, and logic-level interface compatibility with MCU-based motor control firmware.

Technical Context

The EV6619-Q-00A implements a complete test platform for the MP6619 QFN-19 (3mm×3mm) H-bridge driver, integrating all necessary power decoupling (100μF electrolytic + 4.7μF ceramic bulk + 100nF local), current-sense resistor (50mΩ), bootstrap capacitors, and configurable logic inputs via CN1 header or manual DIP switch SW1.

It supports dual control modes: EN/INx logic-driven operation (with truth table-defined H/L/Z states) and adjustable current trip threshold (200mV default, scalable down via ISET resistor), enabling precise torque calibration and overcurrent margin tuning without modifying firmware or hardware layout.

Key Specifications

Availability

EV6619-Q-00A is available at Aetrix Electronics and suitable for brushed DC motor control validation, solenoid actuation testing, and H-bridge gate-drive characterization requiring stable component supply, traceable revision history (Rev. 1.1), and documented thermal derating data.

Supply support for EV6619-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-efficiency power management ICs, with design centers in the US, China, and Taiwan, and global distribution through authorized partners.

The MP6619 product line targets cost-sensitive, space-constrained brushed DC motor applications demanding robust fault handling, low R_DS(ON), and minimal external component count-optimized for factory automation, medical pumps, and portable instrumentation.

FAQ

What input voltage range is supported, and what happens outside that range?

The EV6619-Q-00A accepts 5.4 V to 28 V DC at VIN. Below 5.4 V, UVLO disables the MP6619; above 28 V, OVP triggers shutdown. The board lacks overvoltage clamping, so input must remain within spec to avoid damage to U1 or C1/C5.

How is current limiting configured, and can it be adjusted in-circuit?

Current limit is set by the ISET pin voltage (default 200 mV). An external resistor between ISET and GND scales trip current per I_TRIP = 0.2 V × (40 kΩ / R_ISET). RV1 (50 kΩ trimmer) enables real-time adjustment without soldering-verified with oscilloscope current probe on OUT1/OUT2.

Does the board support PWM control, and what is the maximum frequency?

Yes-EN and INx pins accept standard logic-level PWM. The MP6619 supports up to 1 MHz switching, but board parasitics limit practical use to ≤200 kHz. Layout minimizes loop inductance with short traces, 1210 ceramic bulk caps, and dedicated SGND plane.

What protection features are implemented, and how are faults signaled?

OCP, OVP, OTP, and UVLO are fully implemented. Faults assert nFAULT (pin 13) low; the board includes a 100 kΩ pull-up (R5) to VCC. No auto-retry-recovery requires toggling EN or cycling VIN after fault root cause removal.

Can the board drive bidirectional motors, and how are direction and brake controlled?

Yes-direction is set by IN1/IN2 logic (H/L = forward, L/H = reverse); both high = fast decay brake, both low = slow decay brake. Truth table in Quick Start Guide defines all four states. Brake current is limited by same ISET threshold as drive current.

Is thermal performance documented, and what heatsinking is recommended?

Thermal data shows 45°C rise at 5 A, 25°C ambient, with no heatsink. Board uses 2-oz copper on top/bottom layers and thermal vias under U1. For continuous 5 A operation, add forced airflow or attach U1's exposed pad to chassis ground via thermal adhesive.