Monolithic Power Systems Inc. EV6545-V-00A

Overview

EV6545-V-00A from Monolithic Power Systems is a 45V, 2.5A three-phase power stage evaluation board built around the MP6545GV QFN-28 IC. It demonstrates brushless DC motor drive capability with independent high-side/low-side input control per phase, 4.5–45V input voltage range, and on-board logic switching via SW1 or external MCU through CN1 connector.

For engineers reviewing the EV6545-V-00A datasheet, EV6545-V-00A pinout, EV6545-V-00A application, or EV6545-V-00A equivalent, this board enables rapid validation of three-phase gate drive timing, fault response (nFAULT), sleep mode (nSLEEP), and output current capability up to 2.5A per phase under real thermal and layout conditions.

Technical Context

The EV6545-V-00A implements the MP6545's native 3-phase half-bridge architecture with discrete HS/LS input mapping per channel (HS1/LS1 to HS3/LS3), supporting both synchronous and asynchronous PWM control. Its truth table defines four states per phase: high-Z (0,0), low-side on (0,1), high-side on (1,0), and high-Z (1,1).

Board-level design includes dedicated VCP charge pump pins (CPA/CPB), internal VREG (5V), nRESET and nFAULT monitoring, and PGND/VG test points for accurate current sensing and gate waveform capture. Input logic is compatible with 3.3V or 5V MCU I/O levels.

Key Specifications

Availability

EV6545-V-00A is available at Aetrix Electronics and suitable for BLDC motor prototyping, industrial actuator development, and embedded motion control applications requiring stable component supply and fast-turn evaluation support.

Supply support for EV6545-V-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 core expertise in DC/DC converters, motor drivers, and battery management solutions.

The MP6545 product line delivers integrated three-phase power stages for compact, efficient BLDC motor drives-designed specifically for space-constrained applications such as drones, robotics, and precision HVAC fans.

FAQ

What power supply voltages are required to operate the EV6545-V-00A?

The board requires two independent supplies: a main input (VIN) between 4.5V and 45V for the power stage, and a logic supply (VCC) of either 3.3V or 5V for the control interface and onboard bias circuitry. Both must be referenced to common GND.

How is motor phase control implemented on this evaluation board?

Phase control is achieved via six independent logic inputs (HS1/LS1, HS2/LS2, HS3/LS3) routed to U1 (MP6545GV). These can be driven manually using SW1 or externally via the 12-pin CN1 header, which maps directly to MCU GPIO pins with 3.3V/5V compatibility.

Does the EV6545-V-00A include current sensing capability?

No. The board does not integrate shunt amplifiers or ADC interfaces for current measurement. However, it provides a 100 mΩ sense resistor (R1) between PGND and GND, enabling external differential measurement of phase current with appropriate instrumentation.

What is the purpose of the CPA and CPB pins on the board?

CPA and CPB are charge pump capacitor terminals for the MP6545's internal high-side gate driver. They connect to C5 and C6 (4.7µF/100V ceramic capacitors) to generate the floating voltage needed to drive the high-side MOSFET gates above the phase voltage rail.

Can the EV6545-V-00A drive a sensorless BLDC motor?

Yes - the MP6545 supports sensorless commutation when paired with an external controller that implements back-EMF detection and timing logic. The board provides full access to all necessary signals (OUTx, nFAULT, nSLEEP) but does not include embedded commutation firmware.

Is thermal management provided on the EV6545-V-00A?

The board uses 2-oz copper layers and thermal vias under the MP6545GV QFN-28 package to dissipate heat. For continuous 2.5A operation, forced airflow or heatsinking is recommended; derating applies above 25°C ambient per the MP6545 datasheet thermal curves.