Monolithic Power Systems Inc. EV6545-F-00A

Overview

EV6545-F-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP6545 three-phase power stage IC, supporting 4.5V–45V input voltage and delivering up to 2.5A per phase for BLDC motor drive applications. It features TSSOP-28EP-mounted MP6545GF, on-board logic-level control via SW1 or external MCU through CN1, and integrated fault reporting via nFAULT pin.

For engineers reviewing the EV6545-F-00A datasheet, EV6545-F-00A pinout, EV6545-F-00A application, or EV6545-F-00A equivalent, this board enables rapid validation of three-phase gate-drive timing, thermal performance under 2.5A/phase load, and HS/LS input logic behavior (including Hi-Z states) in real-world motor-control signal chains.

Technical Context

The EV6545-F-00A implements a complete test platform for the MP6545 three-phase power stage, with dedicated VIN (4.5–45V), VCC (3.3V/5V), and PGND routing optimized for low-inductance high-current switching. Its layout includes 100mΩ current-sense resistor R1, dual-stage output filtering (C5/C6 = 4.7μF/100V ceramic + C3/C4 = 1μF/16V), and TVS-protected I/O lines.

Control interface supports both manual toggle (SW1) and external MCU-driven HSx/LSx inputs per phase, with truth table-defined output states (H/L/Hi-Z). The board exposes all critical signals-nSLEEP, nFAULT, nRESET, CPA/CPB charge-pump nodes-and provides test points (VG, NFLT, PGND) for oscilloscope probing during dynamic switching characterization.

Key Specifications

Availability

EV6545-F-00A is available at Aetrix Electronics and suitable for BLDC motor control development, industrial actuator prototyping, and three-phase inverter reference design requiring stable component supply and full signal accessibility.

Supply support for EV6545-F-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 expertise in DC-DC converters, motor drivers, and power stages for industrial, computing, and automotive markets.

The MP6545 product line delivers integrated three-phase power stages targeting space-constrained, thermally demanding BLDC applications where discrete gate-driver + MOSFET solutions lack efficiency, layout simplicity, or reliability.

FAQ

What input voltage range does the EV6545-F-00A support?

The board accepts 4.5V to 45V DC on the VIN rail, matching the MP6545's operational input range. This allows testing across 12V, 24V, and 36V industrial bus systems. VCC must be separately supplied at 3.3V or 5V for logic circuitry and internal LDO operation.

How is motor phase control implemented on this evaluation board?

Phase control uses six independent logic inputs (HS1/LS1, HS2/LS2, HS3/LS3) routed to SW1 DIP switches or external MCU via CN1. Each pair determines output state per half-bridge (H, L, or Hi-Z) per Table 1 in the reference design guide, enabling full six-step commutation without external logic.

Does the EV6545-F-00A include current sensing?

Yes - a 100mΩ, 1% precision shunt resistor (R1, 2512 package) is placed in the PGND path for each phase, allowing differential voltage measurement across its terminals to calculate real-time phase current using standard op-amp circuits or ADC inputs.

Can the board operate without an external microcontroller?

Yes - all six HS/LS inputs are accessible via SW1 DIP switch bank, enabling manual commutation sequencing and static output state verification. This supports basic functional validation before integrating with a host controller.

What thermal management features are included?

The board uses the MP6545's exposed pad (TSSOP-28EP) soldered directly to a large copper pour tied to multiple thermal vias. Layout includes dedicated PGND planes and minimized high-current loop area to reduce switching losses and improve heat dissipation at 2.5A/phase continuous operation.

Is the nFAULT signal electrically isolated?

No - nFAULT is an open-drain output referenced to the board's GND plane, not opto-isolated. It pulls low during internal fault conditions (overcurrent, overtemperature, UVLO) and requires an external pull-up resistor (not populated by default) for proper logic-level signaling to host controllers.