Monolithic Power Systems Inc. EV6507-Q-00A

Overview

EV6507-Q-00A from Monolithic Power Systems is a fully assembled and tested evaluation board for the MP6507GQ bipolar stepper motor driver IC, supporting full-step and half-step excitation modes with 500mA per channel output current, 2.7V–15V input voltage range, and dual N-channel MOSFET H-bridge topology. It enables rapid validation of motion control in compact, low-power embedded systems.

For engineers reviewing the EV6507-Q-00A datasheet, EV6507-Q-00A pinout, EV6507-Q-00A application, or EV6507-Q-00A equivalent, this board provides direct access to MP6507GQ's control interface (AIN1/AIN2/BIN1/BIN2), fault monitoring (FAULT pin), thermal shutdown indication, and configurable current sensing via R6/R7/R8/R9 - critical for POS printer actuator tuning, USB-powered camera pan/tilt calibration, and battery-operated device motor characterization.

Technical Context

The EV6507-Q-00A implements the MP6507GQ's dual full-bridge architecture with external current-sense resistors (400mΩ per channel) setting a precise 500mA output limit, and supports both externally applied and on-board generated control signals via jumpers CN2–CN5 and switches SW1–SW4. Its BST pin enables charge-pump gate drive for efficient N-MOSFET switching across the 2.7V–15V VIN range.

Thermal protection is actively monitored through the FAULT pin, which pulls low during over-temperature shutdown and illuminates LED1; UVLO ensures operation only above ~2.5V. Sleep mode is controlled via SW5 (VIN or VSLP routing) and the nSLEEP input, enabling power-gating for portable applications.

Key Specifications

Availability

EV6507-Q-00A is available at Aetrix Electronics and suitable for POS printer actuator development, video security camera pan/tilt mechanism validation, and battery-powered portable motor control requiring stable component supply and rapid prototyping capability.

Supply support for EV6507-Q-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, including DC/DC converters, motor drivers, and LED controllers, with global design and support infrastructure.

The MP6507 product line delivers integrated bipolar stepper motor drivers with embedded N-MOSFET bridges and robust protection features - designed specifically for space-constrained, low-noise, and thermally sensitive motion control applications.

FAQ

What motor types does the EV6507-Q-00A support?

The board supports bipolar stepper motors wired across AOUT1/AOUT2 and BOUT1/BOUT2, as well as two independent DC motors. It does not support unipolar steppers or brushless DC (BLDC) motors. Motor winding resistance must be compatible with the 500mA current limit and 15V supply - typical test motor: L=2mH, R=10Ω.

How is output current adjusted on this evaluation board?

Output current is set by the 400mΩ sense resistors R6/R7 (channel A) and R8/R9 (channel B). To change the limit, replace these resistors using Equation (1) or (2) from the quick start guide: I_OUT ≈ 0.2V / R_SENSE. Lower resistance increases current; higher resistance reduces it. No onboard trimmer or digital interface is provided.

Can the EV6507-Q-00A operate from a USB 5V source?

Yes - the MP6507GQ operates down to 2.7V, so 5V USB power is fully supported. When powered from 5V, ensure motor load remains within 500mA/channel and thermal dissipation stays within limits; the board's thermal shutdown (OTP) and FAULT pin provide real-time protection.

What is the role of the BST pin on the EV6507-Q-00A?

BST is the bootstrap capacitor connection for the high-side N-MOSFET gate driver in each H-bridge. C2 (0.1µF, 25V X7R) is soldered between BST and SW (switch node) to sustain gate voltage swing above VIN, enabling full enhancement of the upper MOSFETs during continuous conduction.

Is there an isolated power domain for logic and motor supplies?

No - VIN powers both the MP6507GQ logic and H-bridges. However, CN1 provides a regulated 5V (VDD) output derived from the IC's internal LDO, intended for powering external logic or microcontrollers. This VDD rail shares ground with the motor circuit but is not galvanically isolated.

How do I enable sleep mode for power savings?

Set SW5 to the VSLP position (bottom side), then apply a logic-low signal to the VSLP terminal via an external controller. When nSLEEP is pulled low, the MP6507GQ disables gate drivers and enters ultra-low-quiescent-current sleep state (<10µA), retaining configuration but halting motor output.