Monolithic Power Systems Inc. MP6604BGV-P

Overview

MP6604BGV-P 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 output current, features 150mΩ typical R_DS(ON) per MOSFET, and integrates OCP, OVP, UVLO, thermal shutdown, and open-drain fault reporting (nFAULT). Used in precision stage lighting and 3D printer axis drivers.

For engineers reviewing the MP6604BGV-P datasheet, MP6604BGV-P pinout, MP6604BGV-P application, or MP6604BGV-P equivalent, key selection criteria include PHASE/ENBL interface compatibility, QFN-28 thermal performance (θ_JA = 40°C/W), dual independent bridge timing (t₁/t₂ ≤ 360ns), and integrated charge pump (VCP) support for high-side gate drive above VIN.

Technical Context

The MP6604BGV-P implements two independent N-channel H-bridges with automatic synchronous rectification to minimize body-diode conduction loss during inductive current recirculation. Each bridge uses dedicated PHASE, ENBL, BRAKE, and BMOD inputs to configure direction, enable, braking mode, and decay behavior.

Internal regulation includes a 5V VREG supply for low-side gate drive and a charge-pump-based VCP supply exceeding VIN by ~5V for high-side gate drive-both requiring external X7R ceramic capacitors (1µF at VREG–GND, 1µF at VCP–VIN, 100nF between CPA–CPB). Fault detection is latched and requires nRESET assertion or power cycle for recovery.

Key Specifications

Pinout & Package

MP6604BGV-P is packaged in a thermally enhanced QFN-28 (4mm × 5mm) with exposed thermal pad, rated MSL Level 2, and optimized for high-power density motor control layouts. The package supports θ_JA = 40°C/W on a 4-layer PCB with adequate thermal vias and copper pour.

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 DRV8825, MP6604BGV-P uniquely balances wide-input-voltage operation (4.5–45V), independent dual-bridge control, and integrated charge-pump gate drive-making it optimal for industrial 24V/36V stepper and DC motor systems needing flexible braking and robust fault handling.

Availability

MP6604BGV-P is available at Aetrix Electronics and suitable for stage lighting, 3D printing, laser printer paper feed, and textile machine tension control requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP6604BGV-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, with global manufacturing and quality certifications.

The MP6604B product line targets industrial motion control applications demanding wide input voltage range, high output current, and integrated protection-designed specifically for stepper and brushed DC motor systems where reliability and thermal efficiency are critical.

FAQ

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

The MP6604BGV-P delivers up to 2.5A per phase continuously at T_A ≤ 85°C with a 4-layer PCB, 2oz copper, and ≥4 thermal vias under the exposed pad. At 100°C ambient, derating to 1.8A is required per the thermal resistance (θ_JA = 40°C/W) and maximum junction temperature (150°C) limits.

Does MP6604BGV-P support microstepping?

No-MP6604BGV-P does not integrate a microstepping indexer. It provides raw dual H-bridge drive with PHASE/ENBL interface, requiring an external controller (e.g., MCU or dedicated stepper sequencer) to generate precise step and direction signals for microstepping waveforms.

How is the nFAULT pin used in system-level fault handling?

nFAULT is an open-drain output that pulls low during OCP, OVP, or thermal shutdown events. It must be externally pulled up (e.g., 10kΩ to 3.3V) and monitored by the host MCU. A low state indicates latched fault condition; recovery requires asserting nRESET low for >1µs or cycling VIN.

Can MP6604BGV-P drive a single 4-wire bipolar stepper motor?

Yes-MP6604BGV-P is explicitly designed for 2-phase bipolar stepper motors. Its dual independent H-bridges connect directly to phases A and B (AOUT1/AOUT2 and BOUT1/BOUT2), supporting full-step, half-step, and custom excitation patterns via APHASE/AENBL and BPHASE/BENBL control.

What external capacitors are mandatory for stable operation?

Four capacitors are mandatory: (1) ≥100nF ceramic at each VIN pin to GND; (2) 1µF/16V X7R ceramic from VREG to GND; (3) 1µF/16V X7R ceramic from VCP to VIN; (4) 100nF/≥VIN-rated X7R ceramic between CPA and CPB. All must be placed within 2mm of respective pins.

Is there internal pull-down on all logic inputs?

Yes-every digital input (APHASE, AENBL, BPHASE, BENBL, ABRAKE, BBRAKE, nSLEEP, nRESET) includes a 100kΩ internal pull-down resistor, ensuring defined logic-low state when left floating or driven by open-drain sources.

What is the purpose of the ABMOD and BBMOD pins?

ABMOD and BBMOD set the decay mode during braking: logic high selects fast decay (current recirculates through HS-FETs), logic low selects slow decay (current recirculates through LS-FETs). This allows per-bridge optimization of torque ripple, power dissipation, and acoustic noise.