Monolithic Power Systems Inc. EV6550-G-00A

Overview

EV6550-G-00A from Monolithic Power Systems is an evaluation board for the MP6550 1.8V–22V, 2A H-bridge motor driver IC used to drive brushed DC motors in embedded motion control systems. It features a QFN2×2-12 mounted MP6550GG, 3.3V LDO output (V5OUT), PWM-compatible IN1/IN2 interface, and adjustable current limit via potentiometer RV1.

For engineers reviewing the EV6550-G-00A datasheet, EV6550-G-00A pinout, EV6550-G-00A application, or EV6550-G-00A equivalent, this board enables rapid validation of MP6550-based motor drive designs with configurable enable (nSLEEP_HB/nSLEEP_LDO), current sensing (VISEN), and dual power inputs (VIN, VDD).

Technical Context

The EV6550-G-00A implements the MP6550's full functional interface: dual logic-level inputs (IN1/IN2) control H-bridge direction and braking, while nSLEEP_HB and nSLEEP_LDO independently disable high-side bridge and internal 3.3V LDO. VISEN provides proportional current-sense output referenced to GND.

Board-level design includes input filtering (C1, C2), bootstrap decoupling (C3, C4), TVS protection (D3), and test points for all critical signals (VCC, OUT1, OUT2, ISET). The 6.35 cm × 6.35 cm PCB supports both bench testing and integration into prototype systems.

Key Specifications

Availability

EV6550-G-00A is available at Aetrix Electronics and suitable for brushed DC motor control validation, solenoid actuation testing, and embedded motion subsystem development requiring stable component supply and repeatable evaluation hardware.

Supply support for EV6550-G-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 battery management.

The MP6550 product line delivers integrated H-bridge drivers for space-constrained brushed DC motor applications in industrial automation, robotics, and portable equipment where efficiency, thermal robustness, and small-footprint packaging are critical.

FAQ

What power supplies are required to operate the EV6550-G-00A?

The board requires two independent supplies: a 3.3 V source (≤100 mA) connected to VDD and GND for logic and LDO bias, and a 1.8–22 V source (≥2 A capability) connected to VIN and GND for the H-bridge output stage. Both grounds must be common.

How is motor current limited on this evaluation board?

Current limit is set by adjusting the 10 kΩ potentiometer RV1, which applies a 0–1.2 V voltage to the ISET pin of the MP6550GG. This scales the full-scale output current linearly from 0 A to 2 A, as defined by the device's internal 0.2 V/A VISEN gain.

Can the EV6550-G-00A drive bidirectional brushed DC motors?

Yes - the board supports full H-bridge operation via IN1 and IN2 logic inputs. Forward, reverse, brake, and coast states are implemented per MP6550 truth table. Direction and speed are controlled using standard PWM signals applied to these pins.

What protection features are implemented on the EV6550-G-00A?

The board leverages all MP6550GG internal protections: thermal shutdown, output short-circuit detection, and overcurrent limiting. Additional board-level safeguards include SMA TVS diode D3 on VIN and ceramic bypass capacitors (C2–C4) for EMI suppression and transient immunity.

Is the 3.3 V LDO output (V5OUT) enabled by default?

No - the internal 3.3 V LDO is controlled by nSLEEP_LDO. When SW1 is set to "ON", nSLEEP_LDO is pulled low, enabling V5OUT. When SW1 is "OFF", V5OUT is disabled and draws <1 µA quiescent current.

Does the board provide access to the MP6550GG's current-sense signal?

Yes - the VISEN pin is routed to a dedicated test point and also connects to header pin 3 of the OUTPUT connector. It outputs a ground-referenced analog voltage (0.2 V per ampere of motor current) for real-time monitoring and closed-loop control.