My Inquiry
My Account
Allegro MicroSystems AMT49400GLKATR
- Part No.:
- AMT49400GLKATR
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 10-LSOP (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AMT49400GLKATR.pdf
- Description:
- WINDOWLESS SINUSOIDAL BLDC FAN D
- Quantity:
- Payment:
- Shipping:
Inventory:886
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AMT49400GLKATR from Allegro MicroSystems is a fully integrated 3-phase sensorless BLDC motor driver with on-chip power MOSFETs, field-oriented control (FOC) algorithm, EEPROM programmability, and I²C interface. It operates from 4–16 V, delivers up to 2 A output current, and targets fan and pump applications requiring quiet, efficient, and reliable commutation without Hall sensors.
For engineers reviewing the AMT49400GLKATR datasheet, AMT49400GLKATR pinout, AMT49400GLKATR application, or AMT49400GLKATR equivalent, key selection considerations include its integrated FOC engine, <10 µA standby current, PWM speed input + FG tach output, soft-on/soft-off startup, and configurable current limit for thermal and motor protection in compact fan systems.
Technical Context
The AMT49400GLKATR implements a proprietary sensorless field-oriented control (FOC) algorithm that estimates rotor position via back-EMF integration, enabling high-efficiency torque control and low acoustic noise. Its closed-loop speed regulation supports both open- and closed-loop modes, with rated speed programmable via I²C EEPROM.
Control logic includes lock detection with 5-second auto-restart, short-circuit protection (phase-to-GND/VBB), UVLO (3.4–4.0 V hysteresis), and thermal shutdown at 165 °C with 20 °C hysteresis. The device uses PWM input for speed demand and FG open-drain output for speed feedback, while sharing PWM/FG pins with I²C SCL/SDA functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4–16 V - Supports standard 5 V, 12 V, and 15 V fan rails without external regulators. |
| Output Current | 2 A - Continuous phase current capability sufficient for mid-power computer and appliance fans. |
| Standby Current | <10 µA - Enables ultra-low-power idle states in always-on ventilation systems. |
| Motor PWM Frequency | 22.8–26.0 kHz - Ultrasonic switching minimizes audible noise during operation. |
| Total RDS(on) | 1000–1150 mΩ - Combined source + sink resistance determines conduction loss and thermal rise at full load. |
| VREF Output | 2.7–2.95 V @ 5 mA - Stable internal reference used for analog sensing and optional external biasing. |
| Operating Temperature | –40 to +105 °C - Qualified for industrial and automotive cabin fan environments. |
Pinout & Package
AMT49400GLKATR is housed in a 10-lead SOIC package with exposed thermal pad (LK suffix), optimized for surface-mount assembly and enhanced heat dissipation on 2-layer PCBs (RθJA = 40 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM | Logic input / I²C clock | Accepts 0–100% duty-cycle speed command; doubles as I²C SCL when enabled. |
| FG | Open-drain tach output / I²C data | Provides motor speed pulses; reconfigures to I²C SDA after first command. |
| VBB | Main power supply input | Connects to 4–16 V motor bus; supports transient up to 20 V (10 ms). |
| OUTA/OUTB/OUTC | 3-phase motor outputs | Drive BLDC motor windings directly; no external gate drivers required. |
| GND | Power and signal ground | Common return path; must be connected to exposed thermal pad for thermal integrity. |
| VREF | Internal voltage reference | 2.8 V ±5% output powers internal circuitry and can bias external components. |
| TEST1/TEST2 | Factory test terminals | No user function; must be left unconnected or tied to GND per layout guidelines. |
| PAD | Exposed thermal pad | Electrically connected to GND; requires ≥6 thermal vias for optimal junction cooling. |
Key Features
| Feature | Design Value |
|---|---|
| Sensorless FOC Algorithm | Fully embedded real-time motor control eliminates need for external position sensors and reduces BOM cost. |
| Soft-On Soft-Off (SOSO) | Gradual current ramp-up/down suppresses mechanical vibration and acoustic noise during startup/shutdown. |
| I²C Programmability | EEPROM stores motor-specific parameters (rated voltage/current/speed/resistance) for plug-and-play tuning across variants. |
| Lock Detection & Auto-Restart | Monitors BEMF signature to detect stalled rotor and disables drive for 5 s before safe retry-prevents overheating. |
| Configurable Current Limit | Peak phase current clamped to 1.3× programmed rated current, protecting both IC and motor under overload. |
Applications
| Computer Fans | Exhaust Fans |
|---|---|
Use Scenario: High-reliability 12 V cooling fans in servers and desktop PCs requiring silent operation and long life. IC Role / Device Role / Timing Role: Integrated BLDC driver executing sensorless FOC to commutate 3-phase fan motor with minimal external components. Use Value: Eliminates Hall sensors and discrete gate drivers, reducing board area by >30% while achieving <25 dB(A) acoustic noise at full speed. | Use Scenario: Industrial exhaust fans in HVAC ducts needing robust startup under variable airflow load. IC Role / Device Role / Timing Role: Motor controller managing windmill restart, reverse-windmill tolerance, and soft acceleration to avoid mechanical stress. Use Value: Non-reverse startup algorithm ensures immediate forward rotation without oscillation-even after sudden airflow reversal. |
| Home Appliance Pumps | Home Appliance Fans |
Use Scenario: Condensate removal pumps in dehumidifiers and air conditioners operating intermittently with low-duty cycles. IC Role / Device Role / Timing Role: Smart pump driver providing closed-loop speed control, overcurrent protection, and thermal shutdown. Use Value: Configurable current limit and lock detection prevent dry-run damage; standby current <10 µA extends system battery life in portable units. | Use Scenario: Circulation fans in smart ovens and range hoods requiring precise speed modulation and quiet operation. IC Role / Device Role / Timing Role: Fan motor controller using PWM input for variable-speed command and FG output for closed-loop verification. Use Value: I²C interface enables OEMs to store custom startup profiles and PID gains in EEPROM-eliminating hardware revisions for motor swaps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar BLDC motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| A4964KLPTR-T | Legacy Allegro 3-phase driver; lacks integrated FOC, requires external microcontroller for commutation logic. | Needs external MCU and sensor interface; higher system complexity and component count. | Choose only if legacy design reuse or cost-sensitive non-FOC applications are required. |
| DRV10983ZRTVT | Texas Instruments sensorless BLDC driver; supports 18 V max VBB but no EEPROM-configuration requires external memory or MCU. | Requires external I²C EEPROM or host MCU for parameter storage; no built-in lock detection auto-restart. | Select when TI ecosystem compatibility or higher voltage margin (>16 V) is prioritized over self-contained tuning. |
Compared with A4964KLPTR-T and DRV10983ZRTVT, the AMT49400GLKATR delivers turnkey FOC execution, on-chip EEPROM for motor-specific calibration, and autonomous lock recovery-reducing firmware development effort and improving time-to-market for fan and pump modules.
Availability
AMT49400GLKATR is available at Aetrix Electronics and suitable for computer fans, exhaust fans, and home appliance pumps requiring stable component supply, long-lifecycle support, and production-ready motor control integration.
Supply support for AMT49400GLKATR 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
Allegro MicroSystems is a U.S.-based designer of high-performance magnetic sensors and power ICs, specializing in motion control, energy-efficient power conversion, and precision current sensing.
The AMT49400GLKATR belongs to Allegro's AMT family of integrated BLDC drivers, engineered specifically for cost-sensitive, high-volume fan and pump applications demanding sensorless FOC, ultra-low standby power, and factory-programmable motor tuning.
FAQ
What is the maximum motor supply voltage supported by the AMT49400GLKATR?
The AMT49400GLKATR supports a continuous motor supply voltage (VBB) from 4 V to 16 V. Absolute maximum rating is 20 V for transients ≤10 ms. Exceeding 16 V during normal operation may cause premature device failure or violate thermal limits due to increased RDS(on) losses. Always verify VBB rail stability and decoupling per the recommended 4.7 µF ceramic capacitor at the VBB pin.
Does the AMT49400GLKATR require external Hall-effect sensors for commutation?
No, the AMT49400GLKATR does not require external Hall-effect sensors. It implements a fully integrated sensorless field-oriented control (FOC) algorithm that estimates rotor position using back-EMF voltage measurements from the motor windings. This eliminates the need for external position sensors, simplifying mechanical design and reducing system cost and failure points in fan and pump applications.
How is motor speed controlled on the AMT49400GLKATR?
Motor speed on the AMT49400GLKATR is controlled via a PWM input signal applied to the PWM pin. Duty cycle determines speed demand: 0–100% duty corresponds to 0–rated speed in closed-loop mode (programmed via EEPROM). The device also supports open-loop operation and offers FG tach output for speed verification. Closed-loop mode can be enabled/disabled through I²C configuration.
Can the AMT49400GLKATR operate in standby mode, and how is it entered/exited?
Yes, the AMT49400GLKATR enters standby mode automatically when the PWM input remains logic low for >1 second and the motor is stationary. Standby current drops to <10 µA, and VREF is disabled. Exit occurs on a rising edge at the PWM pin. This feature significantly reduces system power consumption in intermittent-use appliances like dehumidifiers and smart ovens where the fan/pump operates in duty cycles.
What protection features are integrated into the AMT49400GLKATR?
The AMT49400GLKATR integrates short-circuit protection (phase-to-GND, phase-to-VBB, and phase-to-phase), overtemperature shutdown (165 °C with 20 °C hysteresis), VBB UVLO (3.4–4.0 V), lock detection with 5-second auto-restart, and configurable current limiting. These protections act autonomously without MCU intervention, ensuring robust operation in unattended fan and pump systems where reliability is critical.
AMT49400GLKATR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 10-LSOP (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- -
- Interface:
- I2C
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- Fan Motor Driver
- Current - Output:
- -
- Voltage - Supply:
- -
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-SOIC
AMT49400GLKATR FAQ
1.How can I place an order for AMT49400GLKATR through Aetrix?
Please submit a Request for Quotation (RFQ) for AMT49400GLKATR 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 AMT49400GLKATR reliable?
The price and inventory of AMT49400GLKATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AMT49400GLKATR is usually 5 days.
3.What payment methods are accepted for AMT49400GLKATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AMT49400GLKATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AMT49400GLKATR?
AMT49400GLKATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AMT49400GLKATR 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 AMT49400GLKATR?
For technical support, including AMT49400GLKATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AMT49400GLKATR requirements.
6.How does Aetrix verify that AMT49400GLKATR is sourced from the original manufacturer or authorized distributors?
All AMT49400GLKATR 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 AMT49400GLKATR meets industry standards.
7.What is the process for return or replacement of AMT49400GLKATR?
All AMT49400GLKATR units undergo pre-shipment inspection (PSI). If there is an issue with AMT49400GLKATR, 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 AMT49400GLKATR part is unused and in its original packaging.
Return procedure for AMT49400GLKATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AMT49400GLKATR Tags
-
DRV2603RUNR
Texas Instruments
-
DRV8837CDSGR
Texas Instruments
-
DRV8837DSGR
Texas Instruments
-
DRV8838DSGR
Texas Instruments
-
DRV8839DSSR
Texas Instruments
-
EMC2301-1-ACZL-TR
Microchip Technology
-
DRV8231ADSGR
Texas Instruments
-
EMC2302-2-AIZL-TR
Microchip Technology
-
DRV8800PWPR
Texas Instruments
-
DRV8835DSSR
Texas Instruments
-
EMC2303-1-KP-TR
Microchip Technology
-
DRV8876PWPR
Texas Instruments
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
