Monolithic Power Systems Inc. MP6602GV-P

Overview

MP6602GV-P from Monolithic Power Systems is a 35V bipolar/unipolar stepper motor driver IC with integrated indexer, internal current sensing, stall detection, and SPI interface. It delivers up to 4A per phase (ambient- and layout-dependent), supports microstepping down to 1/32-step, and operates from 4.5V–35V input. Used in precision motion control systems requiring diagnostic feedback and low external component count - such as 3D printer extruder/carriage drivers.

For engineers reviewing the MP6602GV-P datasheet, MP6602GV-P pinout, MP6602GV-P application, or MP6602GV-P equivalent, key selection criteria include its 4.5–35V VIN range, QFN-25 package thermal performance, stall detection via BEMF measurement, automatic hold current scaling, and dual control modes (SPI + STEP/DIR).

Technical Context

The MP6602GV-P integrates two full-bridge N-channel MOSFET drivers (HS-FET: 60mΩ typ, LS-FET: 30mΩ typ) with constant-off-time PWM current regulation and automatic decay mode selection. Its internal current-sense architecture eliminates external shunt resistors while supporting peak current programming (125mA–4A) via 6-bit ISET register.

It implements a hardware indexer with TSTP register-based step position tracking, configurable microstep resolution (full to 1/32-step), and real-time BEMF measurement (8 gain settings, ±5% ADC accuracy) accessible over SPI. Fault reporting includes open-load, OCP (5–10A trip), OVP (35.2–39.5V), UVP (4.5V rising), thermal warning (150°C), and shutdown (165°C).

Key Specifications

Pinout & Package

MP6602GV-P is housed in a thermally enhanced QFN-25 (4mm × 5mm, 0.5mm pitch) package with exposed thermal pad. Pin 1 is marked by dot; top marking includes MPS prefix, year/week code, and lot number. Requires 1µF ceramic capacitor on VCP-to-VIN and VG-to-GND, plus ≥100nF decoupling on each VIN and VCC pin.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar stepper motor driver applications.

Compared with TB6600HG and DRV8825, MP6602GV-P uniquely combines internal current sensing, hardware indexer, and BEMF-based stall detection in a single QFN-25 package - enabling higher integration, reduced system-level validation effort, and autonomous fault response without host intervention.

Availability

MP6602GV-P is available at Aetrix Electronics and suitable for 3D printer motion control, laser printer paper feed, and textile machine yarn tensioning requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for MP6602GV-P 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.

The MP6602 product line targets precision motion control applications demanding high integration, diagnostic capability, and thermal robustness - specifically addressing the needs of industrial automation, office equipment, and advanced consumer robotics.

FAQ

What is the maximum continuous output current per phase for MP6602GV-P?

The MP6602GV-P supports up to 4A per phase under optimal thermal conditions: 4-layer PCB with 2oz copper, full thermal pad soldering, ambient temperature ≤85°C, and adequate airflow. Derating applies above 85°C junction temperature; typical sustained current is 2.8A at 125°C TJ.

Does MP6602GV-P require external current-sense resistors?

No. The MP6602GV-P uses internal MOSFET R_DS(on)-based current sensing, eliminating the need for external shunt resistors. This reduces BOM count, PCB area, and power loss associated with sense resistors while maintaining ±4.5% current accuracy across 71–100% of I_PEAK.

How does stall detection work on MP6602GV-P?

Stall detection uses real-time back-EMF (BEMF) measurement: when rotor motion stops, BEMF amplitude drops sharply. The IC compares measured BEMF against expected values per step position (via TSTP register) and asserts nFAULT while setting the STALL bit in the FAULT register - all without host processor involvement.

Can MP6602GV-P drive unipolar stepper motors?

Yes. Unipolar operation is enabled via the UNI bit in CTRL2 register. In this mode, only one LS-FET per winding is active, common terminal connects to VIN, and decay is fixed to slow mode - supporting legacy unipolar motors without modification to external wiring.

What is the function of the VCP pin?

VCP is the charge pump output used to generate gate drive voltage above VIN for high-side N-MOSFETs. A 1µF, 16V ceramic capacitor must be connected between VCP and VIN to sustain sufficient gate overdrive across the full 4.5–35V input range and ensure reliable H-bridge switching.

Is MP6602GV-P compatible with both 3.3V and 5V logic systems?

Yes. All digital inputs (STEP, DIR, ENBL, SLEEP, nRESET, nSCS, SDATI, SCLK) accept 3.3V or 5V logic levels. VCC operates from 3V to 5.5V, and internal level-shifting ensures correct interpretation regardless of host MCU I/O voltage - simplifying interface with mixed-voltage systems.