Monolithic Power Systems Inc. EV6520-V-00A

Overview

EV6520-V-00A from Monolithic Power Systems is a dedicated evaluation board for the MP6520GV bipolar stepper motor driver IC, supporting full-, half-, quarter-, and eighth-step microstepping modes. It operates from 8V to 32V input, delivers up to 1.5A motor current, and features on-board VREF control, automatic decay mode, and fault indication output - validated for printer motion control systems.

For engineers reviewing the EV6520-V-00A datasheet, EV6520-V-00A pinout, EV6520-V-00A application, or EV6520-V-00A equivalent, this board enables rapid validation of MP6520GV's current regulation accuracy, step resolution behavior, decay mode switching response, and fault reporting timing under real motor load conditions.

Technical Context

The EV6520-V-00A implements direct interface logic between external MCU signals (STEP/DIR) and the MP6520GV QFN-28 driver, with configurable reference voltage (0–0.75V) setting peak coil current. It supports manual SW1-based control or external CN1-driven command sequencing.

Board-level protection includes over-current (OCP), over-voltage (OVP), and over-temperature (OTP) detection circuits, with NFAULT open-drain output signaling active faults. Decay mode selection is either automatic or mixed-ratio adjustable via resistor network configuration.

Key Specifications

Availability

EV6520-V-00A is available at Aetrix Electronics and suitable for printer motion control, lab-grade stepper characterization, and industrial automation prototyping requiring stable component supply and traceable evaluation hardware.

Supply support for EV6520-V-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) designs high-performance power management semiconductors with focus on efficiency, integration, and reliability across consumer, industrial, and automotive markets.

The EV6520-V-00A belongs to MPS's motor driver evaluation platform family, engineered specifically to accelerate adoption of their integrated stepper drivers like MP6520GV in precision motion applications.

FAQ

What motor types does the EV6520-V-00A support?

The board is designed exclusively for bipolar stepper motors, verified with two-phase, four-wire configurations. It does not support unipolar or three-phase motors. Motor connection uses AOUT1/AOUT2 and BOUT1/BOUT2 terminals, each rated for continuous 1.5A output per phase.

How is current limit set on this evaluation board?

Peak motor current is set by applying an external reference voltage (0–0.75V) to the EXT_REF connector, which scales the MP6520GV's internal current regulator. The actual current equals VREF × 1.5A / 0.75V, with sensing performed by dual 100mΩ, 1% resistors (R1/R2) in series with each H-bridge leg.

Can I use the board without an external MCU?

Yes - SW1 provides manual 8-bit step/direction control, and SW2/SW3 configure reference and step signal sources. Pull-up VCC (3.3V or 5V) must be supplied externally to enable SW1 operation, as no on-board LDO generates logic rail from VIN.

What protection features are implemented on the board?

OCP, OVP, and OTP are fully implemented using MP6520GV's internal circuits, with fault status reported via the open-drain NFAULT pin. No additional discrete protection components (e.g., TVS, fuses) are placed on power paths - protection relies entirely on the IC's embedded safety architecture.

Is the board RoHS-compliant and lead-free?

Yes - all components on EV6520-V-00A meet RoHS Directive 2011/65/EU requirements. MPS confirms the MP6520GV IC and all listed BOM parts (e.g., GRM188R71H104KA93D, RC0603FR-0710KL) are lead-free and halogen-free, with full compliance documented in MPS Quality Assurance resources.