Monolithic Power Systems Inc. EVQ6615-QK-00A

Overview

EVQ6615-QK-00A from Monolithic Power Systems is an AEC-Q100-qualified evaluation board for the MPQ6615GQKTE-AEC1 40V, 8A H-bridge DC motor driver IC. It supports input voltage from 4.75V to 40V, delivers up to 8A continuous output current, and features integrated current sensing on both forward/reverse low-side paths (SOA/SOB), OCP, UVLO, and thermal shutdown. It is used to validate brushed DC motor control in automotive seat actuators, door latches, and similar 12V/24V systems.

For engineers reviewing the EVQ6615-QK-00A datasheet, EVQ6615-QK-00A pinout, EVQ6615-QK-00A application, or EVQ6615-QK-00A equivalent, this board enables rapid functional validation of MPQ6615-AEC1 gate drive timing, current-sense scaling (VREF = 3.3V or 5V), PWM/EN logic modes (INM[1:0] selectable), fault response (NFAULT), and sleep/wake sequencing (NSLEEP) under real load conditions.

Technical Context

The EVQ6615-QK-00A implements a complete test platform for the MPQ6615GQKTE-AEC1, which integrates four N-channel MOSFETs in a TQFN-26 package with wettable flanks and uses an internal charge pump to sustain high-side gate drive at 100% duty cycle. Its SOA/SOB outputs deliver current-proportional analog signals (IOUT × RSENSE scaling) referenced to VREF (3.3V or 5V).

Control is configurable via DIP switches SW1–SW4: SW1 enables the IC; SW2 selects OCP mode (retry or latch-off); SW3/SW4 set INM[1:0] to select among three input logic schemes (enable/PWM, ENBL/DIR/BRK/BMOD, or INH/INL). All power, signal, and test points-including VIN, 3P3, VREF, ENx, PWMA/B, SA/SB, SOA/SOB, NFAULT, and NSLEEP-are brought out to 1mm or 2mm headers for oscilloscope probing and controller interfacing.

Key Specifications

Availability

EVQ6615-QK-00A is available at Aetrix Electronics and suitable for automotive body electronics validation, brushed DC motor control prototyping, and AEC-Q100 compliance verification requiring stable component supply and traceable sourcing.

Supply support for EVQ6615-QK-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 for automotive, industrial, cloud computing, and consumer applications.

The MPQ6615 product line delivers AEC-Q100-qualified H-bridge drivers optimized for automotive comfort systems-specifically designed to replace mechanical relays in seat adjusters, door locks, sunroofs, and mirror actuators with precise, efficient, and fault-resilient electronic control.

FAQ

What is the primary purpose of the EVQ6615-QK-00A evaluation board?

The EVQ6615-QK-00A is a dedicated hardware platform for evaluating the MPQ6615GQKTE-AEC1 H-bridge motor driver. It provides all necessary power conditioning, signal routing, configuration switches (SW1–SW4), test points, and connectors to validate electrical performance-including current sensing accuracy, fault response timing, PWM-driven motor commutation, and sleep/wake behavior-under realistic automotive voltage and load conditions.

How do I configure the MPQ6615-AEC1 for direction-control mode?

Set INM[1:0] to 01 using SW3 and SW4 as defined in Table 3 of the reference document. This enables ENBL/DIR/BRK/BMOD logic: DIR high drives motor forward, DIR low reverses it; BRK high applies dynamic braking; BMOD high enables brake modulation. ENBL must be high to activate the bridge, and all control signals are referenced to the 3.3V or 5V V3P3 supply provided to the board.

Can the EVQ6615-QK-00A support 100% duty-cycle operation?

Yes. The onboard MPQ6615GQKTE-AEC1 uses an internal charge pump and trickle-charge circuit to maintain sufficient gate drive voltage for the high-side MOSFETs during continuous conduction. This capability is verified on the EVQ6615-QK-00A and enables full-voltage motor hold without shoot-through risk or gate drive collapse.

What current-sense interface options does the board provide?

The board exposes SOA and SOB pins that source/sink current proportional to each phase's low-side output current. Scaling is set by VREF (3.3V or 5V) and external resistor dividers (e.g., 4.99kΩ networks shown in schematic). Output current resolution and offset are characterized across temperature and duty cycle, supporting closed-loop torque or stall detection in automotive ECUs.

Does the board include protection against overvoltage or reverse polarity?

No. The EVQ6615-QK-00A assumes properly conditioned input power. It relies on the MPQ6615-AEC1's internal UVLO (triggering below ~4.2V) and over-temperature shutdown, but lacks external TVS diodes, reverse-polarity MOSFETs, or input fusing. Users must add external protection (e.g., automotive-grade TVS at VIN) when connecting to unregulated battery sources or test benches with potential transients.

Is the board compatible with standard microcontroller GPIOs?

Yes. All digital control inputs (ENA, ENB, PWMA, PWMB, INM0/1, OCMD) accept 3.3V or 5V logic levels and are routed to 1mm pitch headers. The board's 3P3 supply rail (3.3V or 5V) can power compatible MCU I/O, and NFAULT/NSLEEP open-drain outputs interface directly with pull-up–based microcontroller interrupt or status monitoring circuits.