Monolithic Power Systems Inc. EV6619L-Q-00A

Overview

EV6619L-Q-00A from Monolithic Power Systems is a fully assembled evaluation board for the MP6619L 2.5V–28V, 5A H-bridge motor driver IC in QFN-19 (3mm×3mm) package. It supports configurable current limiting (200mV default ISET trip voltage), dual supply inputs (VIN up to 28V, VCC 2.8–5.5V, VDD 3.3V/5V), and implements full protection including OCP, OVP, UVLO, and thermal shutdown. It is used to validate brushed DC motor control in industrial actuators and robotic joints.

For engineers reviewing the EV6619L-Q-00A datasheet, EV6619L-Q-00A pinout, EV6619L-Q-00A application, or EV6619L-Q-00A equivalent, this board enables rapid validation of MP6619L's H-bridge timing behavior, current-sense calibration, EN/INx logic sequencing, and fault response under real load conditions with adjustable current limit and dual-supply operation.

Technical Context

The EV6619L-Q-00A implements the MP6619L's native 4-pin logic interface (EN, IN1, IN2, ISET) with manual SW1 toggle and CN1 MCU header support. It separates power domains: high-side VIN (2.5–28V), bias VCC (2.8–5.5V), and logic VDD (3.3V/5V), enabling independent supply sequencing and noise isolation.

Current limiting is implemented via external R_ISET connected to the ISET pin, allowing V_ITRIP adjustment from 200mV down to lower values per Equation (1); output current limit scales inversely with sense resistor R_ISEN = 50mΩ as confirmed by BOM and schematic.

Key Specifications

Availability

EV6619L-Q-00A is available at Aetrix Electronics and suitable for brushed DC motor control validation, H-bridge gate drive characterization, and current-sense amplifier calibration requiring stable component supply and traceable reference hardware.

Supply support for EV6619L-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 power management ICs, founded in 1997 and headquartered in Kirkland, WA.

The EV6619L-Q-00A belongs to MPS's motor driver evaluation platform family, designed specifically to accelerate development of compact, thermally robust brushed DC motor control systems using their integrated H-bridge solutions.

FAQ

What input voltage ranges does the EV6619L-Q-00A support for VIN, VCC, and VDD?

VIN accepts 2.5V to 28V for motor power; VCC supplies internal bias at 2.8V to 5.5V; VDD must be set to either 3.3V or 5V for logic-level control signals. These are physically isolated rails on the board, allowing independent sequencing and preventing cross-coupling during startup or fault recovery.

How is current limiting configured on the EV6619L-Q-00A?

Current limit is set via the ISET pin: floating defaults to 200mV trip voltage (V_ITRIP), yielding ~4A with the onboard 50mΩ sense resistor; connecting R4 (100kΩ trim pot) between ISET and GND reduces V_ITRIP, enabling precise I_{OUT_LIM} tuning per Equation (2) in the user guide.

Does the board provide access to the MP6619L's fault reporting pin?

Yes - the open-drain nFAULT pin is routed to a dedicated yellow test point (TP6). It asserts low during over-current, over-voltage, under-voltage lockout, or thermal shutdown events, and requires an external pull-up to VDD for proper logic-level signaling.

Can the EV6619L-Q-00A be used with an external microcontroller?

Yes - the CN1 4-pin header (EN, IN1, IN2, GND) provides direct MCU interface with 3.3V/5V logic compatibility. The board includes series resistors (R7–R9) on all control lines to suppress ringing and ensure clean edge transitions during PWM or step-direction control.

What is the purpose of the dual ground connectors (GND1 and GND2)?

GND1 serves the high-current motor path (VIN/GND/VOUT), while GND2 isolates low-noise logic and bias circuits (VCC/VDD/CN1/SW1). This separation minimizes ground bounce and improves current-sense accuracy during dynamic motor commutation.

Is thermal performance validated on this evaluation board?

Yes - the board uses a 2-layer PCB with exposed copper pads under U1 (MP6619L QFN-19) and thermal vias to inner planes. Thermal shutdown behavior was verified per Rev. 1.0 test report at 5A continuous load with 25°C ambient and no forced airflow.