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Allegro MicroSystems A1441EELLT-T
- Part No.:
- A1441EELLT-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 6-PowerUFDFN
- Datasheet:
-
A1441EELLT-T.pdf
- Description:
- IC MOTOR DRIVER 2V-4V 6MLP/DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,380
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Product details
Overview
A1441EELLT-T from Allegro MicroSystems is a discontinued low-voltage full-bridge brushless DC motor driver with integrated Hall element for commutation, operating from 2.0 V to 4.0 V, delivering ±150 mA load current, and featuring micropower sleep mode (10 µA) and active motor braking. It targets vibration motor control in cellular phones, electronic toothbrushes, pagers, and handheld game controllers.
For engineers reviewing the A1441EELLT-T datasheet, A1441EELLT-T pinout, A1441EELLT-T application, or A1441EELLT-T equivalent, key selection considerations include its Hall-based commutation architecture, 6-pin MLP 2×2 mm package with exposed thermal pad, magnetic switchpoints (BOP = 35–75 G, BRP = –75 to –35 G), and discontinuation status requiring legacy design support planning.
Technical Context
The A1441EELLT-T integrates a Hall sensor and full-bridge driver on a single Bipolar-CMOS die, enabling closed-loop commutation using an alternating-pole ring magnet without external components. Its chopper-stabilized Hall sensing ensures stable magnetic response across –40°C to +85°C ambient temperature.
Control logic includes a dedicated SLEEP pin with TTL-compatible thresholds (VINLO ≤ 0.5 V, VINHI ≥ VDD–0.7 V), 2 µs crossover dead time to prevent shoot-through, and 225 ms restart delay after wake-up to ensure reliable motor phase alignment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.0 V to 4.0 V - supports single-cell Li-ion or alkaline battery operation without regulation. |
| Load Current | ±150 mA - sufficient for small vibration motors and low-power fan loads with cogging plates. |
| Sleep Mode Current | 10 µA - enables multi-week battery life in portable devices during idle periods. |
| Magnetic Switchpoints | BOP = 35–75 G, BRP = –75 to –35 G - provides robust hysteresis (70 G) against mechanical vibration noise. |
| Output Saturation Voltage | ≤500 mV at 100 mA, 3.6 V - minimizes conduction loss and self-heating in compact 2×2 mm MLP package. |
| Operating Temperature | –40°C to +85°C - qualified for consumer and industrial ambient environments without derating. |
Pinout & Package
Package: 6-contact MLP/DFN/SON (suffix EL), 2.0 × 2.0 × 0.50 mm nominal height, lead-free matte tin plating, exposed thermal pad for enhanced dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Accepts 2.0–4.0 V; powers Hall sensor, logic, and output drivers. |
| SLEEP | Active-low enable control | Logic-low (≤0.5 V) enters micropower sleep; high-Z input draws ≤1 µA. |
| NC | No connection | Unbonded internal node; must be left floating or tied to GND per layout best practice. |
| GND | Ground reference | Common return for supply, Hall bias, and output current paths; connects to exposed thermal pad. |
| VOUT1 | Bridge output terminal 1 | Switches between VDD and GND under Hall-commutated control; drives one side of bipolar motor winding. |
| VOUT2 | Bridge output terminal 2 | Complementary switching to VOUT1; forms full-bridge path with VOUT1 for bidirectional motor drive. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hall element + driver | Single-chip solution eliminates external sensor placement, alignment, and interface circuitry. |
| Chopper-stabilized Hall sensing | Compensates for offset drift over temperature and supply, ensuring consistent magnetic threshold accuracy. |
| Active motor braking | Shorts motor terminals via internal FETs during stop command, enabling rapid deceleration without external components. |
| Restart delay (225 ms) | Guarantees stable Hall signal acquisition and phase initialization before first commutation pulse. |
Applications
| Vibration Motor Control | Personal Care Device Drive |
|---|---|
Use Scenario: Haptic feedback generation in smartphones and wearable remotes. IC Role / Device Role / Timing Role: Full-bridge driver with embedded Hall commutation senses magnet position to sequence coil energization. Use Value: Eliminates need for external Hall sensor and gate drivers, reducing BOM count and PCB area in space-constrained handsets. | Use Scenario: Oscillating motion in rechargeable electric toothbrushes. IC Role / Device Role / Timing Role: Low-voltage motor controller managing bidirectional rotation via Hall-latched commutation. Use Value: 2.0–4.0 V operation matches battery discharge curve; 10 µA sleep current extends runtime between charges. |
| Portable Gaming Actuation | Low-Power Fan Control |
Use Scenario: Rumble feedback in handheld video game controllers. IC Role / Device Role / Timing Role: Compact motor driver providing timed, polarity-switched drive pulses synchronized to game events. Use Value: 2×2 mm MLP package fits within tight mechanical envelopes; 150 mA output sustains tactile intensity across battery life. | Use Scenario: Airflow generation in compact medical or instrumentation cooling modules. IC Role / Device Role / Timing Role: Brushless DC driver optimized for cogging-plate fan motors requiring precise pole alignment. Use Value: Integrated Hall element ensures accurate rotor position detection without external timing references or encoder signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar brushless DC motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| A4957ELJTR-T | Higher voltage range (4.5–40 V), higher current (±2.5 A), external Hall sensor required. | Designed for automotive HVAC blowers and industrial fans, not portable low-voltage vibration motors. | Select only if upgrading to higher-power motor loads and redesigning for external sensing and wider supply. |
| DRV10970RGER | Three-phase sensorless BLDC driver (no Hall input), 2.5–20 V, integrated MOSFETs, 500 mA continuous. | Targets small fans and pumps where Hall sensor cost or placement is prohibitive; lacks magnetic input interface. | Choose when Hall-based commutation is unnecessary and sensorless startup reliability meets application requirements. |
Compared with A1441EELLT-T, A4957ELJTR-T supports higher power but requires external Hall sensing and board-level voltage translation, while DRV10970RGER removes Hall dependency entirely but cannot replicate the precise magnetic-triggered commutation timing critical for haptic vibration profiles.
Availability
A1441EELLT-T is available at Aetrix Electronics and suitable for legacy design support, repair, and replacement in cellular phone actuators, electronic toothbrushes, pagers, and handheld gaming peripherals requiring stable component supply despite end-of-life status.
Supply support for A1441EELLT-T 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 and manufacturer of high-performance Hall-effect sensors, motor drivers, and power ICs, founded in 1989 and headquartered in Worcester, Massachusetts.
The A1441 product line was developed specifically for ultra-compact, battery-powered haptic actuation systems requiring integrated Hall sensing and minimal external components.
FAQ
Is A1441EELLT-T still in production?
No, A1441EELLT-T is a discontinued product. Allegro officially ended production on November 2, 2009. It is no longer manufactured, and samples are unavailable. Aetrix Electronics maintains limited legacy stock for repair and replacement use only, with full traceability and documentation for A1441EELLT-T.
What is the function of the NC pin on A1441EELLT-T?
The NC (pin 3) on A1441EELLT-T is an unconnected internal node with no electrical function. It must remain unconnected on the PCB - neither tied to VDD nor GND. Layout guidelines recommend leaving it floating or optionally grounding it only if required by EMI mitigation in high-noise environments, though A1441EELLT-T datasheet does not mandate this.
Can A1441EELLT-T drive a standard 3-wire brushless DC fan?
No, A1441EELLT-T is designed exclusively for 2-wire bipolar brushless DC motors with integrated alternating-pole ring magnets. It lacks the three-phase gate drive logic and back-EMF sensing circuitry required for standard 3-wire fans. Using A1441EELLT-T with such a fan will result in failure to start or erratic operation.
What is the purpose of the 225 ms restart delay in A1441EELLT-T?
The 225 ms restart delay in A1441EELLT-T ensures stable Hall sensor initialization and magnetic field acquisition after exiting sleep mode. This prevents false commutation triggers during transient conditions and guarantees correct motor phase alignment before the first drive pulse - a critical requirement for repeatable haptic response in A1441EELLT-T applications.
Does A1441EELLT-T require external capacitors or resistors for basic operation?
No, A1441EELLT-T requires no external passive components for core operation. All timing, regulation, and commutation logic are fully integrated. Only a 0.1 µF ceramic bypass capacitor between VDD and GND is recommended per Allegro layout guidance to suppress supply noise - no pull-up/down resistors, current-sense shunts, or Hall biasing networks are needed for A1441EELLT-T functionality.
A1441EELLT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 6-PowerUFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (2)
- Interface:
- On/Off
- Technology:
- Bi-CMOS
- Step Resolution:
- -
- Applications:
- Haptic Feedback
- Current - Output:
- 150mA
- Voltage - Supply:
- 2V ~ 4V
- Voltage - Load:
- 2V ~ 4V
- Operating Temperature:
- -40°C ~ 165°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-MLP/DFN (2x2)
A1441EELLT-T FAQ
1.How can I place an order for A1441EELLT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1441EELLT-T 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 A1441EELLT-T reliable?
The price and inventory of A1441EELLT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1441EELLT-T is usually 5 days.
3.What payment methods are accepted for A1441EELLT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1441EELLT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1441EELLT-T?
A1441EELLT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1441EELLT-T 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 A1441EELLT-T?
For technical support, including A1441EELLT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1441EELLT-T requirements.
6.How does Aetrix verify that A1441EELLT-T is sourced from the original manufacturer or authorized distributors?
All A1441EELLT-T 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 A1441EELLT-T meets industry standards.
7.What is the process for return or replacement of A1441EELLT-T?
All A1441EELLT-T units undergo pre-shipment inspection (PSI). If there is an issue with A1441EELLT-T, 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 A1441EELLT-T part is unused and in its original packaging.
Return procedure for A1441EELLT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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