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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Motor Drivers, Controllers

Monolithic Power Systems Inc. MP6631GL-0000-Z

Name: MP6631GL-0000-Z
Brand: Monolithic Power Systems Inc.
SKU: MP6631GL-0000-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP6631GL-0000-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Motor Drivers, Controllers

Package:: 26-PowerVFQFN

Datasheet:: MP6631GL-0000-Z.pdf

Description:: 24V INPUT, 3A PEAK PHASE CURRENT

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Product details

Overview

MP6631GL-0000-Z from Monolithic Power Systems is a three-phase BLDC motor driver IC with integrated 160mΩ high-side and low-side MOSFETs, supporting 3.6V–24V input, up to 3A peak phase current, sinusoidal drive, and single- or triple-Hall sensor interface for fan, pump, and general BLDC motor control.

For engineers reviewing the MP6631GL-0000-Z datasheet, MP6631GL-0000-Z pinout, MP6631GL-0000-Z application, or MP6631GL-0000-Z equivalent, key selection considerations include Hall sensor configuration flexibility (single vs. triple), closed/open-loop speed control via PWM/DC pin, FG/RD rotational speed or lock detection, DIR-controlled direction, and integrated OCP/UVLO/thermal shutdown protection.

Technical Context

The MP6631 implements a Hall-commutated, sinusoidal drive architecture with configurable speed curve interpolation across five duty points (37.5%–100%), enabling precise torque delivery and low-speed ripple suppression. It supports both open-loop (duty-driven) and closed-loop (Hall-based feedback) speed regulation modes, selectable via OPEN_L/CLOSE_H register bits.

Its functional block integrates Hall signal conditioning, PWM/DC input decoding (1kHz–100kHz or 0–1.2V), dynamic soft-start (1.3–10.4s), pre-startup timing (2.5–20ms), and cycle-by-cycle over-current protection with 2.7–3A trip threshold. The FG/RD pin operates as an open-drain output configurable for 1x/1/2x/1/4x (single Hall) or 1x/1/2x/3x (triple Hall) frequency scaling.

Key Specifications

Parameter	Value and Actual Design Meaning
VIN Range	3.6V to 24V - Enables direct operation from 5V, 12V, or 24V industrial/fan power rails without external LDO.
Peak Phase Current	3A - Supports continuous 3A motor phase current with integrated 160mΩ HS/LS FETs, eliminating need for external gate drivers.
Drive Type	Sinusoidal - Reduces torque ripple and acoustic noise across full speed range versus trapezoidal commutation.
PWM/DC Input	1kHz–100kHz PWM or 0–1.2V DC - Dual-mode speed command interface enables compatibility with legacy PWM fans and analog voltage control systems.
FG/RD Output	Open-drain, configurable frequency scaling - Provides rotor speed feedback (FG) or lock indication (RD) with external pull-up; supports 1x–3x resolution per electrical cycle.
Protection Features	UVLO (3.3V), OCP (2.7–3A), thermal shutdown (160°C), locked-rotor (0.5s detect / 4.5s retry) - Ensures robust operation under fault conditions without external circuitry.
Package	QFN-26 (3mm × 4mm) - Compact thermally enhanced footprint suitable for space-constrained fan modules and embedded motor control PCBs.

Pinout & Package

MP6631GL-0000-Z is housed in a thermally optimized QFN-26 (3mm × 4mm) package with exposed thermal pad (EPAD) on underside for efficient heat dissipation in high-current BLDC applications.

Pin/Terminal	Circuit Role	Design Meaning
1 FG/RD	Open-drain speed/lock indicator	Outputs Hall edge pulses (FG) or stays low during rotor lock (RD); requires external pull-up resistor for logic-level interfacing.
2,19 OUTC	Phase C output terminal	Drives motor winding C via integrated HS/LS FET pair; rated for 3A peak current and 24V max voltage swing.
3,5 PGND	Power ground	Dedicated low-impedance return path for motor current; must be connected to thermal EPAD and separated from AGND for noise immunity.
4,17 OUTB	Phase B output terminal	Drives motor winding B; shares same R_DS(ON) (75mΩ LS / 85mΩ HS) and thermal limits as OUTA/OUTC.
6,15 OUTA	Phase A output terminal	Drives motor winding A; synchronized with HA+/HA− inputs for Hall-based commutation sequencing.
7 HA+, 9 HA−	Phase A Hall differential input	Accepts ±60mV_PK-PK minimum differential Hall signal; common-mode range 1.06–4.43V supports standard Hall sensors.
10 HB+, 11 HB−	Phase B Hall differential input	Enables triple-Hall operation; identical electrical specs to HA+/HA−; unused in single-Hall mode (SINGLE=1).
12 HC+, 14 HC−	Phase C Hall differential input	Completes triple-Hall interface; internally disabled when SINGLE=1; supports differential noise rejection in noisy motor environments.
16,18 VCC	Supply input (3.6–24V)	Power rail for internal logic and gate drivers; requires local 1µF ceramic bypass capacitor per pin to suppress switching noise.
20 PWM/DC	Speed command input	Accepts either PWM (1–100kHz) or DC (0–1.2V); DC_PWM bit selects mode; internal hysteresis prevents false triggering.
22 REF	5.24V reference output	Stable internal reference for external sensor biasing or ADC calibration; requires 1µF local bypass capacitor.
23 AGND	Analog ground	Separate ground for Hall comparators and reference circuitry; must tie to PGND at single point near EPAD to minimize coupling.
24 DIR	Direction control input	Pull low for forward (A→B→C), high for reverse (A→C→B); internal pull-down ensures default forward rotation on power-up.
25 BRK	Brake control input	Pull high to short all phases and brake motor; internal pull-down ensures no-brake state by default.

Key Features

Feature	Design Value
Configurable speed curve	Five-point interpolation (37.5%, 50%, 62.5%, 75%, 87.5%) enables custom fan/pump speed-vs-duty profiles without firmware changes.
Soft-start & pre-startup timing	Programmable t_SS (1.3–10.4s) and T_PRE (2.5–20ms) reduce inrush current and ensure reliable motor alignment before full torque application.
Single-/triple-Hall mode selection	Register bit SINGLE=1 configures for single-Hall operation (HC+/- unused), reducing BOM cost and PCB routing complexity in cost-sensitive fans.
Rotational speed detection	FG/RD pin outputs scalable Hall-edge pulses (1x/1/2x/1/4x or 1x/1/2x/3x) for RPM monitoring or closed-loop feedback without external counters.
Integrated protection suite	UVLO, cycle-by-cycle OCP (2.7–3A), thermal shutdown (160°C), and 0.5s/4.5s locked-rotor detection eliminate need for discrete protection components.

Applications

CPU Cooling Fan

Server Chassis Fan

Use Scenario: High-reliability 12V/24V brushless fan in data center servers requiring precise RPM control and stall detection.

IC Role / Device Role / Timing Role: BLDC motor driver with integrated FETs, Hall interface, and FG/RD speed feedback for closed-loop thermal management.

Use Value: Sinusoidal drive reduces acoustic noise below 25dB(A); configurable speed curve matches server thermal profiles; locked-rotor detection triggers system alerts.

Use Scenario: Multi-fan chassis with variable airflow demands across compute, storage, and network modules.

IC Role / Device Role / Timing Role: Motor controller managing direction (DIR), braking (BRK), and speed (PWM/DC) across parallel fan zones.

Use Value: Single-pin DIR control enables reversible airflow for hot-swap bays; 3A peak current supports high-static-pressure fans; QFN-26 footprint allows dense fan board layouts.

DC Brushless Pump

Industrial HVAC Blower

Use Scenario: 24V coolant circulation pump in medical or analytical equipment needing smooth flow and low EMI.

IC Role / Device Role / Timing Role: Sinusoidal commutation driver with soft-start and low-speed ripple suppression for vibration-sensitive fluid handling.

Use Value: 0.5s rotor lock detection halts pump before overheating; REF pin provides stable bias for temperature sensor; 160mΩ R_DS(ON) minimizes conduction loss at 3A.

Use Scenario: Variable-speed blower in commercial HVAC units operating across wide ambient temperatures (−40°C to +125°C).

IC Role / Device Role / Timing Role: Robust motor driver with UVLO, thermal shutdown, and wide VIN range for unregulated AC-DC supplies.

Use Value: −40°C to +125°C operating junction range ensures reliability in outdoor enclosures; QFN-26 EPAD improves thermal performance under continuous 3A load.

Equivalent & Alternatives

The following parts are listed as comparable options for similar three-phase BLDC motor driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP6632GL-0000-Z	Higher 6A peak phase current, same QFN-26 package, identical register map and pinout.	Required for motors exceeding 3A continuous phase current; shares same software/firmware and layout compatibility.	Select when motor phase current exceeds 3A but thermal and PCB constraints match MP6631 footprint.
TB67B000FTG	External gate driver only (no integrated FETs); requires discrete 30V MOSFETs; supports up to 5A peak.	Demands external high-side/low-side FETs, gate resistors, and bootstrap circuitry-increasing BOM count and layout complexity.	Choose only if higher voltage (>24V) or higher current (>3A) operation justifies added design effort and component count.

Compared with MP6632GL-0000-Z, the MP6631GL-0000-Z offers lower peak current but identical feature set and footprint for cost-optimized 3A designs; versus TB67B000FTG, it delivers full integration with no external FETs or gate drive components, reducing design time and board area.

Availability

MP6631GL-0000-Z is available at Aetrix Electronics and suitable for CPU cooling fans, server chassis fans, DC brushless pumps, and industrial HVAC blowers requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for MP6631GL-0000-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-performance power management ICs, including DC/DC converters, LED drivers, motor drivers, and battery management solutions.

The MP6631 belongs to MPS's fan and BLDC motor driver product line, designed specifically for compact, low-noise, and thermally efficient motor control in computing, industrial, and consumer applications where integrated FETs and Hall sensor support are critical.

FAQ

What Hall sensor configurations does MP6631GL-0000-Z support?

The MP6631GL-0000-Z supports both single-Hall (using only HC+/HC−) and triple-Hall (HA+/HA−, HB+/HB−, HC+/HC−) configurations. Selection is controlled by the SINGLE register bit (REG05h[1]); default is single-Hall (SINGLE=1). Triple-Hall mode improves commutation accuracy at low speeds and under load variation.

How is speed controlled using the PWM/DC pin?

Speed is controlled via the PWM/DC pin in two modes: PWM mode (DC_PWM=0) accepts 1kHz–100kHz signals for duty-cycle-based speed setting; DC mode (DC_PWM=1) accepts 0–1.2V analog voltage. Mode selection is register-configurable, and both support closed-loop or open-loop control depending on OPEN_L/CLOSE_H bits.

What protections are built into MP6631GL-0000-Z?

MP6631GL-0000-Z includes under-voltage lockout (UVLO at 3.3V), cycle-by-cycle over-current protection (2.7–3A), thermal shutdown (160°C with 25°C hysteresis), locked-rotor detection (0.5s timeout, 4.5s auto-retry), and soft-start current limiting. All protections are fully integrated with no external components required.

Can MP6631GL-0000-Z drive motors above 24V?

No. The absolute maximum VCC rating is +28V, but the recommended operating input voltage is strictly 3.6V to 24V. Exceeding 24V violates the specified operating conditions and risks premature failure due to overstress of internal MOSFETs and gate drivers, even if within absolute maximum ratings.

What is the function of the FG/RD pin?

The FG/RD pin is an open-drain output that serves dual functions: as FG (frequency generator) it outputs Hall-edge pulses scaled 1x/1/2x/1/4x (single Hall) or 1x/1/2x/3x (triple Hall); as RD (rotor lock detector) it remains low when no Hall edge is detected for 0.5s. FGRD[1:0] register bits select mode and scaling.

Is MP6631GL-0000-Z pin-compatible with other MPS motor drivers?

MP6631GL-0000-Z is pin-compatible with MP6632GL-0000-Z (6A variant) in the same QFN-26 package, sharing identical pinout, register map, and software interface. It is not pin-compatible with MP6530, MP6532, or non-QFN motor drivers due to differing pin counts, functions, and package footprints.

Does MP6631GL-0000-Z require external programming to operate?

No. MP6631GL-0000-Z operates out-of-the-box with default register settings (e.g., SINGLE=1, DC_PWM=0, SPD_ZERO=1). Programming via I²C is optional for advanced features like custom speed curves, soft-start time, or FG frequency scaling-enabled only when needed for specific application requirements.

MP6631GL-0000-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 26-PowerVFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Motor Type - Stepper:: Multiphase

Motor Type - AC, DC:: Brushless DC (BLDC)

Function:: Driver - Fully Integrated, Control and Power Stage

Output Configuration:: Half Bridge (3)

Interface:: PWM

Technology:: Power MOSFET

Step Resolution:: -

Applications:: General Purpose

Current - Output:: 3A

Voltage - Supply:: 3.6V ~ 24V

Voltage - Load:: 3.6V ~ 24V

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 26-QFN (3x4)

MP6631GL-0000-Z FAQ

1.How can I place an order for MP6631GL-0000-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP6631GL-0000-Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MP6631GL-0000-Z reliable?

The price and inventory of MP6631GL-0000-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP6631GL-0000-Z is usually 5 days.

3.What payment methods are accepted for MP6631GL-0000-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6631GL-0000-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP6631GL-0000-Z?

MP6631GL-0000-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP6631GL-0000-Z order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MP6631GL-0000-Z?

For technical support, including MP6631GL-0000-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6631GL-0000-Z requirements.

6.How does Aetrix verify that MP6631GL-0000-Z is sourced from the original manufacturer or authorized distributors?

All MP6631GL-0000-Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP6631GL-0000-Z meets industry standards.

7.What is the process for return or replacement of MP6631GL-0000-Z?

All MP6631GL-0000-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP6631GL-0000-Z, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MP6631GL-0000-Z part is unused and in its original packaging.

Return procedure for MP6631GL-0000-Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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