Monolithic Power Systems Inc. EV6600L-R-01A

Overview

EV6600L-R-01A from Monolithic Power Systems is an evaluation board for the MP6600L bipolar stepper motor driver IC, supporting up to 35V input and 1.5A phase current in full/half/quarter/eighth-step microstepping modes. It integrates internal current sensing, DIR/STEP/EN/MS1/MS2 control interface, and fault reporting via NFAULT pin.

For engineers reviewing the EV6600L-R-01A datasheet, EV6600L-R-01A pinout, EV6600L-R-01A application, or EV6600L-R-01A equivalent, this board enables rapid validation of MP6600L-based motion control designs with external MCU interfacing, manual switch control, and adjustable current limit via RV1/RV2 potentiometers.

Technical Context

The EV6600L-R-01A implements a complete test platform for the MP6600L QFN-24 stepper driver, featuring dual 2mm VIN/GND screw terminals, 1mm signal headers (AOUT1/AOUT2/BOUT1/BOUT2/DIR/STEP/NFAULT/VCC), and configurable step source selection (INT_STEP vs EXT_STEP via SW2). On-board 100μF/50V bulk capacitor (C1) and ceramic decoupling network ensure stable high-current switching.

Control logic supports both MCU-driven operation (via CN1 8-bit header) and manual evaluation (via SW1 dial switch and pull-up VCC), with real-time current limit tuning (ISET via RV1) and sleep mode activation (NSLEEP via SW1). Fault status is indicated by LED1 and accessible at NFAULT pin.

Key Specifications

Availability

EV6600L-R-01A is available at Aetrix Electronics and suitable for industrial automation prototyping, medical device motion subsystem validation, and robotics actuator development requiring stable component supply and fast-turn evaluation support.

Supply support for EV6600L-R-01A 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, with design centers across Asia and North America and global distribution infrastructure.

The MP6600L product line delivers integrated stepper motor drivers with internal current sensing and microstepping translators, targeting space-constrained motion control applications in printers, scanners, lab equipment, and precision positioning systems.

FAQ

What power supply requirements does the EV6600L-R-01A board have?

The board requires a DC input between 4.5 V and 35 V applied to the VIN and GND screw terminals. A separate 3.3 V or 5 V VCC supply is needed only when using manual control via SW1; MCU-driven operation draws logic power from the CN1 connector's VCC pin.

How is motor current set on the EV6600L-R-01A?

Motor current is adjusted via RV1 (100 kΩ trimming potentiometer), which sets the ISET reference voltage for the MP6600L's internal current-sense amplifier. Full-scale 1.5 A corresponds to ~1.25 V at ISET; calibration is confirmed using the board's test points and oscilloscope measurement of AOUT1/BOUT1 current waveforms.

Can the EV6600L-R-01A drive unipolar stepper motors?

No - the EV6600L-R-01A is designed exclusively for bipolar stepper motors. Its H-bridge outputs (AOUT1/AOUT2/BOUT1/BOUT2) provide bidirectional current flow per phase, and the MP6600L IC lacks unipolar commutation logic or center-tap drive capability.

What interfaces are available for controlling the MP6600L on this board?

Two control paths are provided: (1) External MCU via CN1 8-pin header (DIR, STEP, EN, MS1, MS2, NSLEEP, VCC, GND); (2) Manual control via SW1 dial switch for DIR/EN/MS1/MS2 and SW2 for step source selection (internal oscillator vs external EXT_STEP signal).

Is thermal management required during extended operation?

Yes - sustained 1.5 A operation at >24 V input requires adequate airflow or heatsinking on the MP6600LGR QFN-24 IC. The board includes thermal relief pads and exposed copper under U1, but ambient temperature above 50 °C or enclosure use necessitates forced convection or PCB copper pour extension.

Does the board include protection against back-EMF or voltage spikes?

The board incorporates no dedicated flyback diodes or TVS devices. Protection relies on the MP6600L's internal charge pump (VCP), integrated overvoltage clamp, and built-in slow-decay current recirculation. For high-inductance motors or rapid deceleration, external RC snubbers across motor phases are recommended per MPS AN-127 guidelines.