Monolithic Power Systems Inc. EVQ6524-R-00A

Overview

EVQ6524-R-00A from Monolithic Power Systems is an evaluation board for the MPQ6524 quad half-bridge motor driver IC, designed to validate 7–28V DC motor control with up to 0.9A per channel and integrated serial interface, fault reporting, and thermal/short-circuit protection in automotive and industrial load-driving applications.

For engineers reviewing the EVQ6524-R-00A datasheet, EVQ6524-R-00A pinout, EVQ6524-R-00A application, or EVQ6524-R-00A equivalent, this board enables rapid validation of MPQ6524's four independent half-bridge outputs, low-quiescent-current standby mode (<6μA), AEC-Q100 Grade 1 compliance, and SPI-based control timing behavior under real load conditions.

Technical Context

The EVQ6524-R-00A implements the MPQ6524 (QFN-24 package) as a fully integrated quad half-bridge driver with separate EN, CS, DI, DO, CLK, and FAULT signals routed to accessible test points and headers. It supports independent channel control via standard 3-wire SPI interface and provides real-time diagnostics including overcurrent and thermal shutdown detection.

Board-level design includes dual LDOs (MPQ2013AGQ-33-Z for 3.3V logic supply), input filtering (330μF/35V + 10μF/50V), output decoupling (100nF ×4), and LED indicators tied to OUT1–OUT4 for direction monitoring - all configured to match MPQ6524's recommended operating conditions across −40°C to +125°C ambient.

Key Specifications

Availability

EVQ6524-R-00A is available at Aetrix Electronics and suitable for automotive body control modules, industrial valve actuators, and robotic joint drivers requiring stable component supply, pre-validated motor control reference designs, and AEC-Q100-compliant evaluation hardware.

Supply support for EVQ6524-R-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 analog and power ICs, with core expertise in DC/DC conversion, motor control, and automotive-grade power management solutions.

The MPQ6524 product line delivers quad half-bridge drivers optimized for space-constrained, thermally demanding automotive and industrial motion control applications where precise current limiting, diagnostic visibility, and low-power standby are mandatory.

FAQ

What is the purpose of SW3 on the EVQ6524-R-00A board?

SW3 is a 4-bit DIP switch that configures enable (S1), direction monitoring (S2–S4), and fault response modes. S1 selects whether EN is pulled high (ON) or grounded (OFF); S2–S4 route OUT1–OUT4 signals to LEDs for visual rotation indication in full-bridge configurations.

Can the EVQ6524-R-00A drive brushed DC motors directly?

Yes - the board exposes all four half-bridge outputs (OUT1–OUT4) with screw terminals (CN2–CN4) and supports direct connection to brushed DC motors up to 0.9A per channel. Full-bridge operation requires external external H-bridge wiring using two half-bridges per motor.

Does the board include a 3.3V logic supply?

Yes - U3 (MPQ2013AGQ-33-Z) is a 3.3V, 300mA LDO that powers the SPI interface and logic circuitry. SW1 selects between onboard 3.3V generation (up position) or external 3.3V injection (down position).

How is fault condition indicated on the EVQ6524-R-00A?

A low signal on the FAULT pin (accessible at CN1 pin 15) indicates overtemperature or overcurrent event. LED1 (Power Ready) remains lit during normal operation; no dedicated FAULT LED is present, but the pin is routed to test point and header for oscilloscope or MCU monitoring.

Is the EVQ6524-R-00A compatible with 5V microcontrollers?

Yes - the SPI interface operates at 3.3V logic levels, but level-shifting is not required for 5V-tolerant MCUs with 3.3V-compatible inputs. For strict 5V-only systems, external level shifters must be added between CN1 and the host controller.

What is the maximum continuous load current supported per channel?

Each half-bridge supports up to 0.9A continuous output current at T_A = 25°C with adequate PCB copper area and airflow. Derating applies above 85°C ambient; full 0.9A operation is verified only with heatsinking or forced convection per MPQ6524GR datasheet thermal guidelines.