Monolithic Power Systems Inc. EV6605D-R-00A

Overview

EV6605D-R-00A from Monolithic Power Systems is a 4-channel low-side driver evaluation board built around the MP6605D QFN-24 IC, delivering up to 1.5A per channel into inductive loads with parallel logic interface support for 3.3V/5V control, integrated HS clamp diodes, and protection features including OCP, UVLO, and OT shutdown.

For engineers reviewing the EV6605D-R-00A datasheet, EV6605D-R-00A pinout, EV6605D-R-00A application, or EV6605D-R-00A equivalent, this board enables rapid validation of unipolar stepper motor and solenoid drive topologies using the MP6605D's 4.5–60V input range, 1.5A LS output capability, and fault-indicating nFAULT signal.

Technical Context

The EV6605D-R-00A implements the MP6605D's parallel-input architecture with dedicated IN1–IN4 and nENBL/SLEEP controls, supporting direct microcontroller GPIO interfacing without protocol translation. It routes all four low-side outputs (OUT1–OUT4) to screw terminals and exposes VCLAMP, VIN, VCC, GND, and nFAULT for system-level integration.

Board-level safety includes TVS diode (SMAJ24A) between VIN and VCLAMP, 100μF bulk capacitance on VIN, and 4.7μF/100nF ceramic decoupling per channel. LED1 provides visual fault indication for OCP, UVLO, and OT events triggered by the MP6605D's internal monitoring circuitry.

Key Specifications

Availability

EV6605D-R-00A is available at Aetrix Electronics and suitable for unipolar stepper motor control, solenoid actuation, and industrial relay replacement applications requiring stable component supply and fast prototyping turnaround.

Supply support for EV6605D-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 power management ICs, with design centers across Asia and North America and global distribution partnerships.

The MP6605D product line targets robust, compact inductive load switching in factory automation and motion control systems, integrating protection and clamping to reduce external component count in 24V–60V industrial environments.

FAQ

What power supplies are required to operate the EV6605D-R-00A?

The board requires two independent supplies: a logic supply (3.3V or 5V) connected to VCC/GND, and an input power supply (4.5–30V with TVS installed, or 4.5–60V with VCLAMP tied to VIN) connected to VIN/GND. Both must share a common ground reference.

How is fault condition indicated on the EV6605D-R-00A?

Fault events-including over-current, under-voltage lockout, and over-temperature-are signaled by the MP6605D's open-drain nFAULT pin, which drives LED1 low. The LED remains illuminated until the fault clears and the device resets automatically after recovery conditions are met.

Can the EV6605D-R-00A drive bipolar stepper motors?

No. The EV6605D-R-00A evaluates the MP6605D, a 4-channel low-side-only driver with no high-side drive capability or H-bridge configuration. It supports unipolar stepper motors and solenoids only, where each coil is driven with one side grounded and the other switched to VCLAMP/VIN.

What is the purpose of the VCLAMP pin on the EV6605D-R-00A?

VCLAMP connects to the anode of the internal high-side clamp diode and must be tied to VIN (for 4.5–60V operation) or to a TVS diode (for 4.5–30V operation). It sets the clamp voltage ceiling for inductive kickback energy dissipation during turn-off transitions.

Does the board include current-sense functionality?

No. The EV6605D-R-00A does not integrate current sensing. The MP6605D itself lacks analog current feedback; over-current protection is implemented internally via MOSFET R_DS(on) sensing and triggers automatic shutdown without external components.

Is the SLEEP pin functional on this evaluation board?

Yes. The SLEEP pin (pin 21 of U1) is routed to header P2 and dial switch S1. Asserting SLEEP high reduces quiescent current and disables all outputs while preserving register state, enabling low-power standby in battery-operated systems.