Monolithic Power Systems Inc. EV6508A-Q-00A

Overview

EV6508A-Q-00A from Monolithic Power Systems is an evaluation board for the MP6508A bipolar stepper motor driver IC, featuring dual N-channel full-bridge outputs, 2.7V–18V input voltage range, 1.2A per channel output current, integrated over-current and thermal protection, and support for full-step/half-step motor control in a 5cm×5cm PCB format.

For engineers reviewing the EV6508A-Q-00A datasheet, EV6508A-Q-00A pinout, EV6508A-Q-00A application, or EV6508A-Q-00A equivalent, this board enables rapid validation of MP6508A-based stepper and dual DC motor drive designs with configurable control inputs, on-board current sensing, fault indication, and flexible power/sleep interface routing.

Technical Context

The EV6508A-Q-00A implements the MP6508A's dual full-bridge architecture using discrete QFN-16 packaged IC U1, with dedicated AOUT1/AOUT2 and BOUT1/BOUT2 motor terminals, SENA/SENB current-sense nodes tied to parallel 500mΩ resistors (R8–R13), and FAULT/VDD/nSLEEP/BST signal access via CN1.

Control flexibility is achieved through jumper-selectable sources (CN2–CN5) for AIN1/AIN2/BIN1/BIN2-either external logic via CN1 or manual toggle via SW1–SW4-and sleep mode selection via SW5 routing nSLEEP to VIN or external VSLP, enabling both autonomous and host-synchronized operation.

Key Specifications

Availability

EV6508A-Q-00A is available at Aetrix Electronics and suitable for stepper-driven CNC stages, automated optical alignment systems, and precision fluid dispensing equipment requiring stable component supply and validated reference design support.

Supply support for EV6508A-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, with core expertise in DC-DC conversion, motor drivers, and battery management solutions.

The MP6508A product line targets cost-sensitive, space-constrained motion control applications-delivering integrated full-bridge drivers with robust protection and minimal external components for stepper and dual DC motor systems.

FAQ

What motor types can the EV6508A-Q-00A drive?

The board drives bipolar stepper motors in full-step or half-step mode using AOUT1/AOUT2 and BOUT1/BOUT2 terminals. It also supports two independent DC motors-each connected across one full-bridge pair-with direction and enable controlled via AIN1/AIN2 and BIN1/BIN2 logic inputs.

How is output current configured on this evaluation board?

Output current is fixed at 1.2A per channel by six 500mΩ sense resistors-R8–R10 for channel A (SENA), R11–R13 for channel B (SENB)-implementing the MP6508A's ILIM = 200mV/R_SEN relationship. To change current, replace all three resistors per channel with matched values.

Can I control the MP6508A using an external microcontroller?

Yes. Jumper settings on CN1–CN4 route AIN1, AIN2, BIN1, and BIN2 signals from CN1's 8-pin header to the MP6508A. This allows direct GPIO-level control from an MCU, FPGA, or logic source-no onboard switches or manual toggling required when jumpers are placed between Terminals 1 and 2.

What does the FAULT LED indicate, and how is it triggered?

The red LED1 lights when the MP6508A asserts its open-drain FAULT pin low-occurring during over-current protection (OCP) or thermal shutdown (OTP). The FAULT signal is accessible at CN1 Pin 5 and provides immediate visual and electrical fault signaling without additional circuitry.

Is the nSLEEP pin externally controllable?

Yes. SW5 selects nSLEEP source: Terminal 3 connects it to VIN (pull-up, default active), while Terminal 1 routes VSLP to an external controller. When using external sleep control, apply 3.3V or 5V logic to the VSLP test point to enter/exit low-power mode per MP6508A timing requirements.

Does this board include power supply filtering and decoupling?

Yes. The board integrates C1 (2.2µF), C2 (100nF), C3 (100µF), C4 (10µF), and C5 (100nF) across VIN, BST, VDD, and GND nodes-meeting MP6508A's recommended input capacitance, bootstrap stability, and local decoupling per datasheet guidelines.