Monolithic Power Systems Inc. MP6604CGV-P

Overview

MP6604CGV-P from Monolithic Power Systems is a dual 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, delivers up to 2.5A per phase, features independent HS/LS control inputs per bridge, and integrates OCP, OVP, UVP, and thermal shutdown with open-drain fault reporting. Used in precision stage lighting actuators requiring bidirectional torque and fast current limiting.

For engineers reviewing the MP6604CGV-P datasheet, MP6604CGV-P pinout, MP6604CGV-P application, or MP6604CGV-P equivalent, key selection criteria include its 150mΩ LS R_DS(ON), 40–360ns gate drive timing, QFN-28 (4mm×5mm) thermally enhanced package, and discrete HS/LS logic interface enabling custom PWM and direction sequencing.

Technical Context

The MP6604CGV-P implements eight N-channel MOSFETs arranged as two independent dual half-bridge channels, supporting both dual H-bridge (for stepper phase winding control) and quad half-bridge (for solenoid or independent load driving) configurations. Each channel accepts separate high-side and low-side logic inputs with internal 100kΩ pull-down resistors.

It uses an internal charge pump (VCP) to generate >VIN+5V for high-side gate drive and a regulated 5V VREG supply for low-side drivers. Protection logic latches on over-current (3–4.5A trip), over-voltage (45–48V), under-voltage (4.5V rising threshold), and thermal shutdown (165°C), all signaled via the open-drain nFAULT pin.

Key Specifications

Pinout & Package

MP6604CGV-P is housed in a thermally optimized QFN-28 (4mm × 5mm) package with exposed thermal pad. The 28-pin layout supports dual H-bridge routing, dedicated power grounds (PGNDA/PGNDB), and independent HS/LS control per output.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB6600HG and DRV8825, MP6604CGV-P provides the only combination of integrated wide-VIN protection (OVP/UVP), discrete HS/LS control for custom timing, and QFN thermal performance suitable for sealed industrial enclosures operating continuously at 45V.

Availability

MP6604CGV-P is available at Aetrix Electronics and suitable for stage lighting, 3D printer motion control, and textile machine tension systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP6604CGV-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-efficiency power management ICs, including DC/DC converters, motor drivers, and LED controllers.

The MP6604C product line delivers robust, thermally optimized motor drivers for industrial automation and precision motion control, emphasizing integrated protection, flexible interface architecture, and compact packaging.

FAQ

What is the maximum continuous output current per phase for MP6604CGV-P?

The MP6604CGV-P supports up to 2.5A continuous output current per phase under typical conditions: 24V VIN, TA = 25°C, and a 4-layer PCB with adequate copper pour on the exposed thermal pad. Actual current capability scales inversely with ambient temperature and PCB thermal resistance - derating to ~1.8A is recommended at 85°C ambient with standard layout.

Does MP6604CGV-P require external current-sense resistors for over-current protection?

No. MP6604CGV-P implements internal current sensing for over-current protection with a fixed 3–4.5A trip threshold. It does not require external sense resistors. However, external resistors may be added in series with AOUT/BOUT pins for additional diagnostic monitoring or fine-grained current limiting beyond the internal OCP threshold.

How does the automatic synchronous rectification function work?

When both HS and LS FETs are off and an xOUTx pin voltage drops below GND (inductive flyback), the corresponding LS-FET turns on until current approaches zero or the HS-FET activates. Similarly, if xOUTx exceeds VIN, the HS-FET turns on. This replaces body-diode conduction with active FET conduction, reducing power loss and heat generation during recirculation.

What is the purpose of the CPA, CPB, and VCP pins?

CPA and CPB form the terminals of an external 100nF flying capacitor that charges the internal charge pump. VCP is the boosted output (>VIN + 5V) used to drive the high-side N-channel MOSFET gates. A 1µF X7R ceramic capacitor must connect VCP to VIN to stabilize the boosted rail and sustain gate drive under load.

Can MP6604CGV-P drive unipolar stepper motors?

No. MP6604CGV-P is designed exclusively for bipolar stepper motors and brushed DC motors. Its dual H-bridge topology requires center-tapped or dual-winding configurations and cannot interface with the 5- or 6-wire unipolar stepper motor wiring scheme. For unipolar applications, a dedicated unipolar driver or discrete transistor array is required.

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

MPS recommends connecting the exposed thermal pad to ≥200mm² of 2oz copper on the top layer, with ≥6 thermal vias (0.3mm diameter) filled or plated to inner ground/power planes. Total thermal pad copper area should exceed 300mm² for continuous 2.5A operation at 60°C ambient to maintain TJ < 125°C.

Is MP6604CGV-P compatible with 3.3V logic-level microcontrollers?

Yes. All HS/LS input pins (AHS1, ALS1, etc.) have logic thresholds of V_IL ≤ 0.8V and V_IH ≥ 2.0V, making them fully compatible with 3.3V CMOS outputs. Internal 100kΩ pull-down resistors ensure defined states during MCU reset or I/O float, eliminating need for external biasing.