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Allegro MicroSystems A1448EEWLT-P
- Part No.:
- A1448EEWLT-P
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 6-XFDFN Exposed Pad
- Datasheet:
-
A1448EEWLT-P.pdf
- Description:
- IC MOTOR DRIVER 1.8V-4.2V 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:244
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Product details
Overview
A1448EEWLT-P from Allegro MicroSystems is a discontinued low-voltage full-bridge brushless DC motor driver with integrated Hall sensor, designed for haptic vibration motors in portable electronics. It operates from 1.8 V to 4.2 V, delivers ±200 mA continuous output current, supports direct PWM speed control and active braking via a single CONTROL pin, and integrates reverse battery protection and thermal shutdown.
For engineers reviewing the A1448EEWLT-P datasheet, A1448EEWLT-P pinout, A1448EEWLT-P application, or A1448EEWLT-P equivalent, key selection considerations include its 6-pin MLP/DFN (EW) package, Hall-based commutation for coin-motor control, micro-power sleep mode (<10 µA), soft-switching for EMI reduction, and antistall functionality for reliable rotation in compact devices.
Technical Context
The A1448EEWLT-P implements Hall-effect-based sensorless commutation using an internal chopper-stabilized Hall element with BOP = 35–75 G and BRP = –75 to –35 G. Its full-bridge output stage uses soft-switching to limit dV/dt and suppress audible noise and EMI.
Control logic is centralized on the multifunction CONTROL pin: high-level input enables motor drive per magnetic field polarity, PWM duty cycle modulates speed, grounding initiates active braking (≤2.5 ms prebraking time), and sustained low state triggers micro-power sleep mode (IDD ≤ 10 µA). Antistall recovery re-engages rotation during stall conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 4.2 V - Enables operation directly from single-cell Li-ion or Li-poly batteries without regulation. |
| Continuous Output Current | ±200 mA - Sufficient to drive typical haptic BLDC coin motors (e.g., 3–5 mm diameter, <1 W). |
| CONTROL Pin PWM Frequency | 100–800 kHz - Supports high-resolution speed control while avoiding audible band switching noise. |
| Total Output On-Resistance | 2.2 Ω max at VDD = 4 V - Limits conduction loss and self-heating in thin-profile portable PCBs. |
| Thermal Shutdown Threshold | 165 °C with 20 °C hysteresis - Provides robust overtemperature protection without nuisance tripping during transient loads. |
| Hall Magnetic Switchpoints | BOP = 35–75 G, BRP = –75 to –35 G - Matches standard alternating-pole ring magnets used in miniature vibration motors. |
| Sleep Mode Current | ≤10 µA - Extends battery life in always-on haptic feedback systems (e.g., smartphone ringtone standby). |
Pinout & Package
The A1448EEWLT-P is housed in a 6-contact MLP/DFN (EW) package measuring 1.5 mm × 2.0 mm with 0.40 mm maximum height and an exposed thermal pad for enhanced heat dissipation in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Accepts 1.8–4.2 V; includes integrated reverse-battery protection down to –5.0 V. |
| CONTROL | Multifunction digital input | Accepts PWM (100–800 kHz), triggers active braking when pulled low >2.5 ms, and enters sleep mode on sustained low. |
| NC | No connection | Unbonded die pad; must be left floating or connected to GND per layout guidelines - no electrical function. |
| GND | Ground reference | Common return for supply, outputs, and internal circuitry; tied to exposed thermal pad for thermal and EMI performance. |
| VOUT1 | Bridge output 1 | Swings HIGH/LOW complementary to VOUT2 based on Hall polarity; drives one terminal of BLDC motor coil. |
| VOUT2 | Bridge output 2 | Swings LOW/HIGH complementary to VOUT1; completes H-bridge path across motor winding. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hall sensor with chopper stabilization | Ensures stable magnetic sensing across –40°C to +85°C ambient without external compensation components. |
| Soft-switching algorithm | Controls output slew rate to reduce audible noise and radiated EMI - critical for handheld device EMC compliance. |
| Antistall detection and recovery | Automatically attempts restart on motor stall, preventing coil overheating and ensuring consistent haptic response. |
| Reverse battery protection on VDD and CONTROL | Eliminates need for external blocking diode - reduces BOM count and PCB area in battery-powered designs. |
| Micro-power sleep mode | Reduces quiescent current to ≤10 µA, enabling long-term haptic readiness in battery-operated portable devices. |
Applications
| Smartphone Haptic Feedback | Wearable Vibration Alerts |
|---|---|
|
Use Scenario: Deliver precise tactile feedback for notifications, keyboard actuation, and gaming controls in ultra-thin smartphones. IC Role / Device Role / Timing Role: Full-bridge motor driver with integrated Hall commutation and single-pin PWM/brake/sleep control. Use Value: Enables fast stop-start cycles (<2.5 ms braking), low-noise operation, and sub-10 µA sleep current - extending battery life while maintaining responsive haptics. |
Use Scenario: Provide discreet, low-power vibration alerts in fitness trackers and smartwatches with tight height constraints. IC Role / Device Role / Timing Role: Compact BLDC driver with 0.40 mm profile and Hall-based rotor position sensing for coin-motor control. Use Value: The 1.5 mm × 2.0 mm EW package fits beneath curved displays; soft-switching avoids interference with sensitive RF sections. |
| Electronic Toothbrush Motor Control | Handheld Game Controller Actuation |
|
Use Scenario: Drive oscillating brush head motors requiring reliable start-up, stall recovery, and moisture-resistant integration. IC Role / Device Role / Timing Role: Integrated motor driver with antistall algorithm and thermal shutdown for sealed, battery-powered appliances. Use Value: Eliminates external FETs and protection diodes; reverse-battery protection safeguards against incorrect battery insertion during user replacement. |
Use Scenario: Generate directional rumble effects synchronized with gameplay in compact gamepad housings. IC Role / Device Role / Timing Role: Low-voltage BLDC driver supporting variable-speed PWM and rapid braking for dynamic haptic profiles. Use Value: Single CONTROL pin simplifies MCU GPIO usage; ±200 mA output sustains torque across varying battery voltage (1.8–4.2 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-voltage BLDC motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DRV10970RGET | Higher supply range (2.5–20 V), no integrated Hall sensor - requires external rotor position feedback. | Targets higher-power fans or pumps; not drop-in for Hall-based coin motors. | Choose only if redesigning for external sensor architecture and wider voltage operation. |
| TB67H401FNG | 40 V max supply, 2.5 A output, no Hall integration, larger HTSOP-J8 package (4.5 × 6.0 mm). | Suitable for industrial micro-fans or robotics; incompatible pinout and footprint. | Select when higher current or extended voltage range outweighs size and integration trade-offs. |
Compared with DRV10970RGET and TB67H401FNG, the A1448EEWLT-P offers unique single-chip Hall-integrated haptic control in a 1.5 × 2.0 mm footprint, but lacks support for new designs due to discontinuation - alternatives require PCB layout changes and external sensing or higher power delivery.
Availability
A1448EEWLT-P is available at Aetrix Electronics and suitable for legacy repair, end-of-life component replacement, and maintenance of existing haptic motor systems in smartphones, wearables, and personal care devices requiring stable component supply under controlled procurement.
Supply support for A1448EEWLT-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
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 sensing solutions.
The A1448EEWLT-P belongs to Allegro's low-voltage motor driver product line, engineered specifically for miniaturized haptic and vibration motor applications where integration, ultra-low profile, and battery efficiency are critical.
FAQ
Is the A1448EEWLT-P still in production?
No, the A1448EEWLT-P is a discontinued product. Allegro MicroSystems ceased production as of March 4, 2013. It is not recommended for new designs, and samples are no longer available. Aetrix Electronics provides limited legacy stock for repair and maintenance of existing systems.
What is the package type and footprint of the A1448EEWLT-P?
The A1448EEWLT-P uses a 6-pin MLP/DFN (EW) package measuring 1.5 mm × 2.0 mm with a maximum height of 0.40 mm and an exposed thermal pad. Its land pattern follows IPC-7351 SON50P200X200X100-9M, requiring thermal vias under the pad for optimal performance.
How does the CONTROL pin function in the A1448EEWLT-P?
The CONTROL pin of the A1448EEWLT-P serves three roles: (1) PWM input (100–800 kHz) for speed control, (2) active braking trigger when held low >2.5 ms, and (3) sleep mode entry on sustained low state. It eliminates need for separate control lines in space-constrained haptic systems.
Does the A1448EEWLT-P include reverse battery protection?
Yes, the A1448EEWLT-P integrates reverse battery protection on both VDD and CONTROL pins, rated to –5.0 V on VDD and VDD – 6.0 V on CONTROL. This eliminates the need for external blocking diodes in single-cell battery applications.
Can the A1448EEWLT-P drive motors without an external Hall sensor?
Yes - the A1448EEWLT-P contains a fully integrated, chopper-stabilized Hall sensor. It commutates the motor using only an external alternating-pole ring magnet; no external Hall IC or additional sensing components are required.
A1448EEWLT-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 6-XFDFN Exposed Pad
- 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:
- CMOS
- Step Resolution:
- -
- Applications:
- Haptic Feedback
- Current - Output:
- 200mA
- Voltage - Supply:
- 1.8V ~ 4.2V
- Voltage - Load:
- 1.8V ~ 4.2V
- Operating Temperature:
- -40°C ~ 165°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN/MLP (1.5x2)
A1448EEWLT-P FAQ
1.How can I place an order for A1448EEWLT-P through Aetrix?
Please submit a Request for Quotation (RFQ) for A1448EEWLT-P 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 A1448EEWLT-P reliable?
The price and inventory of A1448EEWLT-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1448EEWLT-P is usually 5 days.
3.What payment methods are accepted for A1448EEWLT-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1448EEWLT-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1448EEWLT-P?
A1448EEWLT-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1448EEWLT-P 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 A1448EEWLT-P?
For technical support, including A1448EEWLT-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1448EEWLT-P requirements.
6.How does Aetrix verify that A1448EEWLT-P is sourced from the original manufacturer or authorized distributors?
All A1448EEWLT-P 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 A1448EEWLT-P meets industry standards.
7.What is the process for return or replacement of A1448EEWLT-P?
All A1448EEWLT-P units undergo pre-shipment inspection (PSI). If there is an issue with A1448EEWLT-P, 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 A1448EEWLT-P part is unused and in its original packaging.
Return procedure for A1448EEWLT-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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