Monolithic Power Systems Inc. MP6604BGV-Z

Overview

MP6604BGV-Z from Monolithic Power Systems is a dual full H-bridge motor driver IC designed for bipolar stepper and brushed DC motor control in industrial motion systems. It operates from 4.5V to 45V input voltage, delivers up to 2.5A per phase, integrates eight N-channel MOSFETs with 150mΩ typical R_DS(ON), and features OCP, OVP, UVLO, thermal shutdown, and open-drain fault reporting - deployed in stage lighting and 3D printer axis drivers.

For engineers reviewing the MP6604BGV-Z datasheet, MP6604BGV-Z pinout, MP6604BGV-Z application, or MP6604BGV-Z equivalent, this page provides verified electrical parameters, QFN-28 package layout guidance, PHASE/ENBL interface timing behavior, and real-world motor drive use cases - all extracted from MPS Rev. 1.1 datasheet (May 2023).

Technical Context

The MP6604BGV-Z implements two independent full H-bridges using integrated N-channel power MOSFETs with synchronous rectification logic to minimize body-diode conduction loss during current recirculation. Its gate drive architecture uses a charge pump (VCP) to generate >VIN+5V for high-side FET turn-on and a regulated 5V VREG supply for low-side drivers.

Control is implemented via PHASE/ENBL interface per bridge, supporting forward/reverse direction and enable/disable states, with dedicated BRAKE and BMOD pins enabling configurable braking modes. Fault detection includes cycle-by-cycle over-current protection with 1µs deglitch, 45V OVP threshold, and 165°C thermal shutdown with 15°C hysteresis.

Key Specifications

Pinout & Package

MP6604BGV-Z is housed in a thermally enhanced QFN-28 (4mm × 5mm) package with exposed thermal pad, JEDEC MO-220 VGHD-3 compliant, MSL Level 2, and 260°C reflow capable. The 28-pin layout supports dual H-bridge routing, charge pump integration, and separate power grounds (PGNDA/PGNDB) to minimize ground bounce between bridges.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual H-bridge motor driver applications.

Compared with TB6612FNG and DRV8876N, MP6604BGV-Z uniquely combines 4.5–45V operation, true dual-bridge integration, charge-pump gate drive, and comprehensive fault reporting in a single QFN-28 package - optimizing board area, thermal management, and system-level reliability for industrial motion.

Availability

MP6604BGV-Z is available at Aetrix Electronics and suitable for stage lighting, 3D printing, and textile machinery requiring stable component supply across extended production lifecycles.

Supply support for MP6604BGV-Z 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-efficiency power management ICs, with design centers in the US, China, and Taiwan, and global distribution since 1997.

The MP6604B product line targets industrial motor control applications demanding wide-input-voltage operation, integrated protection, and compact dual-bridge integration - specifically engineered for stepper and brushed DC drive in space-constrained, thermally demanding environments.

FAQ

What is the maximum continuous output current per H-bridge at 85°C ambient?

At TA = 85°C with standard 4-layer PCB layout (2 oz copper, 10 thermal vias under thermal pad), the MP6604BGV-Z delivers 1.8A continuous per phase. This derating accounts for θJA = 40°C/W and thermal shutdown margin; actual performance depends on heatsinking and airflow.

Can MP6604BGV-Z drive unipolar stepper motors?

No - MP6604BGV-Z is designed exclusively for bipolar stepper and brushed DC motors. Unipolar steppers require center-tapped windings and separate phase control not supported by its dual full-H-bridge topology or PHASE/ENBL interface logic.

Is an external pull-up required on the nFAULT pin?

Yes - nFAULT is an open-drain output. An external pull-up resistor (typically 4.7kΩ to 3.3V or 5V) is mandatory to establish a valid logic-high level during normal operation and enable reliable MCU interrupt detection on fault assertion.

What is the minimum recommended PCB copper area for the thermal pad?

MPS specifies ≥100 mm² of 2 oz copper connected to the exposed thermal pad, with ≥8 thermal vias (0.3mm diameter, filled or plated) connecting to inner ground planes. This achieves the rated θJA = 40°C/W and prevents thermal shutdown under 2.5A load.

Does MP6604BGV-Z support microstepping?

No - MP6604BGV-Z does not include internal indexer or current DAC. Microstepping requires external MCU-based PWM timing and current control; however, its fast 360ns output transitions and ABRAKE/BBRAKE pins support externally generated microstep waveforms with precise decay control.

How does the automatic synchronous rectification function during slow decay?

During slow decay (both LS-FETs on), if V_AOUT1 or V_AOUT2 drops below GND due to inductive flyback, the corresponding LS-FET turns on actively - reducing voltage drop from ~1.1V (body diode) to ~0.3V (R_DS(ON)) and cutting conduction loss by >70% compared to passive rectification.

What is the purpose of the CPA and CPB pins?

CPA and CPB form the flying capacitor node pair for the internal charge pump. A 100nF X7R ceramic capacitor must be connected between them to generate the boosted gate drive voltage (VCP) required for high-side N-FET enhancement across the full 4.5–45V input range.