Monolithic Power Systems Inc. EV6507-F-00A

Overview

EV6507-F-00A from Monolithic Power Systems is a fully assembled and tested evaluation board for the MP6507GF bipolar stepper motor driver IC, featuring dual N-channel full-bridge outputs, 2.7–15V input range, 500mA per channel output current, over-temperature flag, and support for full/half-step motor control in POS printers and battery-powered camera systems.

For engineers reviewing the EV6507-F-00A datasheet, EV6507-F-00A pinout, EV6507-F-00A application, or EV6507-F-00A equivalent, this board enables rapid validation of MP6507GF-based stepper drive designs with on-board jumpers for external or manual signal control, thermal fault indication via LED, and configurable current sensing using 400mΩ sense resistors.

Technical Context

The EV6507-F-00A implements the MP6507GF's dual H-bridge architecture to drive one bipolar stepper motor (full/half-step) or two independent DC motors. It routes AIN1/AIN2/BIN1/BIN2 signals either from CN1 (external controller) or onboard SW1–SW4 switches via CN2–CN5 jumpers.

Thermal protection is verified by FAULT pin assertion and red LED1 illumination during over-temperature shutdown. Current limiting is set to 500mA per channel using parallel 400mΩ resistors (R6//R7 and R8//R9), referencing the MP6507GF's 185mV current-sense threshold.

Key Specifications

Availability

EV6507-F-00A is available at Aetrix Electronics and suitable for POS printer motion control, video security camera pan/tilt actuation, and battery-powered portable instrumentation requiring stable component supply and fast-turn evaluation capability.

Supply support for EV6507-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 analog and power ICs, with design centers across Asia and North America and global distribution.

The MP6507GF product line delivers integrated bipolar stepper drivers targeting space-constrained, thermally sensitive applications such as compact imaging systems and low-noise point-of-sale peripherals.

FAQ

What motor types can the EV6507-F-00A drive?

The board drives one bipolar stepper motor in full-step or half-step mode, or two independent brushed DC motors. It is not compatible with unipolar steppers or three-phase BLDC motors. Motor winding resistance must be ≥10Ω and inductance ≤2mH per phase to meet thermal and timing specifications under 15V operation.

How is output current set and adjusted on this evaluation board?

Output current is fixed at 500mA per channel by parallel 400mΩ sense resistors (R6//R7 and R8//R9), leveraging the MP6507GF's 185mV current-limit threshold. To change current, replace both resistors in each pair with values calculated as R = 185mV / I_limit; e.g., 370mΩ sets 500mA, but 200mΩ yields ~925mA - verify thermal derating and voltage compliance.

Does the board provide power regulation for the MP6507GF's logic supply?

No. The MP6507GF requires an external 5V logic supply, which is provided on CN1 as VDD (5V output). This rail is generated off-board and must be supplied externally or derived from the host system; the EV6507-F-00A does not include a 5V regulator or LDO.

How is thermal fault indicated, and what happens when it triggers?

Thermal shutdown asserts the FAULT pin low, lighting red LED1. The MP6507GF disables all outputs until junction temperature falls below the hysteresis threshold (~15°C below shutdown point). No automatic reset occurs - recovery requires either removal of thermal stress or cycling SLEEP or EN pins.

Can the board operate without an external microcontroller?

Yes. Onboard DIP switches (SW1–SW4) generate AIN1/AIN2/BIN1/BIN2 logic states manually, enabling open-loop stepping without firmware. Direction and step resolution are controlled by switch combinations per the MP6507GF truth table - no programming or host interface required for basic operation.

What connectors are used for motor and control interfaces?

Motor windings connect to CN6 (4-pin, 2.54mm pitch), labeled AOUT1/AOUT2/BOUT1/BOUT2. Control signals route through CN1 (8-pin, 2.54mm), providing VIN, GND, AIN1–BIN2, FAULT, and VDD. Jumpers CN2–CN5 select signal source (CN1 vs. SW1–SW4) per channel.