Monolithic Power Systems Inc. EVQ6533-U-01A

Overview

EVQ6533-U-01A from Monolithic Power Systems is a fully assembled, AEC-Q100-qualified evaluation board for the MPQ6533 three-channel automotive pre-driver IC. It supports 6V–40V input, enables SPI-configurable gate drive for brushed DC motor control, integrates current-sense amplification without shunt resistors, and features configurable dead time, over-current protection, and reverse-battery protection via external N-MOSFET - validated in automotive actuator applications.

For engineers reviewing the EVQ6533-U-01A datasheet, EVQ6533-U-01A pinout, EVQ6533-U-01A application, or EVQ6533-U-01A equivalent, this board provides immediate hardware validation of MPQ6533's serial-input control, 100% duty-cycle capability via bootstrap/charge-pump gate drive, real-time fault diagnostics (OCP, OT, open-load), and GUI-driven parameter tuning for slew rate, blanking time, and current-sense channel selection.

Technical Context

The EVQ6533-U-01A implements the MPQ6533 pre-driver IC in a QFN-32 (5mm×5mm) package with exposed thermal pad, supporting three independent half-bridge channels (GHA/GLA, GHB/GLB, GHC/GLC) and integrated LDO (VREG) for gate bias. It uses internal charge pumps for HS gate drive (BSTx) and reverse-battery protection (VG), plus an on-board MPQ2013AEC1 LDO for logic supply.

Board-level functionality includes SPI interface (SDI/SDO/SCK/SCS), dedicated logic inputs (INA/INB/INC, ENA/ENB/ENC), analog current-sense output (CSO), fault reporting (nFAULT), sleep control (nSLEEP), and visual indicators (D1 red = fault, D9 green = power). All critical signals are accessible via 1mm test points and golden-pin headers.

Key Specifications

Availability

EVQ6533-U-01A is available at Aetrix Electronics and suitable for automotive ECU development, brushed DC motor actuator validation, and AEC-Q100-compliant pre-driver qualification requiring stable component supply, traceable sourcing, and long-term lifecycle support.

Supply support for EVQ6533-U-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 for automotive, industrial, and computing applications, with design focus on integration, efficiency, and AEC-Q100 compliance.

The EVQ6533-U-01A belongs to MPS's automotive evaluation board product line, engineered specifically to accelerate functional safety validation and system-level integration of their pre-driver ICs in motor control and actuation subsystems.

FAQ

What is the primary function of the EVQ6533-U-01A evaluation board?

The EVQ6533-U-01A is a ready-to-use hardware platform designed exclusively to evaluate the MPQ6533 three-channel automotive pre-driver IC. It provides complete signal access, SPI-based configuration, real-time fault monitoring, and motor load interfacing - enabling rapid validation of gate drive timing, current sensing accuracy, and safety feature behavior under automotive voltage conditions (6–40 V).

Does the board include the MPQ6533 IC and supporting components?

Yes. The board integrates the MPQ6533GUE-AEC1 pre-driver in a QFN-32 package, along with the MPQ2013AGQ-33-Z 3.3 V LDO, dual N-channel MOSFETs (STL50DN6F7), reverse-battery protection MOSFET (AM70N04-06D), Zener clamp (BZT52C18), and all required passive components - as verified in the official BOM (Rev. 1.1, Dec 2023).

How is current sensing implemented without shunt resistors?

The MPQ6533 uses an internal amplifier to measure the voltage drop across its low-side MOSFETs' R_DS(on). This technique eliminates external shunt resistors while delivering calibrated current-sense output (CSO) - confirmed in test results showing linear IOUT correlation up to 5 A with 2 Ω/700 µH RL loads at 20 kHz.

Can the board drive actual motors, or is it for signal-level evaluation only?

It is designed for functional and performance evaluation of real motor loads. Test data shows operation with 2 Ω/700 µH RL loads at 20 kHz and 10–90% duty cycles, delivering up to 5 A peak current. External MOSFETs (Q1–Q3) and layout support thermal management for sustained actuator-level drive.

What software tools are supported for configuring the MPQ6533 via the board?

MPS provides a dedicated GUI application that communicates with the EVQ6533-U-01A over SPI to configure per-channel parameters (slew rate, dead time, blanking time), global settings (OCP mode, CSO channel), and register-level diagnostics. The GUI displays real-time fault status and supports full register map read/write - documented in the Rev. 1.1 Quick Start Guide.

Is reverse-battery protection implemented on the board?

Yes. The board uses the MPQ6533's VG output to drive an external N-channel MOSFET (Q5, AM70N04-06D) configured for reverse-polarity protection. This implementation is verified in schematic Figure 3 and aligns with the MPQ6533's internal charge-pump architecture for generating the required gate drive voltage.