The A4949 is a three-phase sensorless sinusoidal fan driver designed to minimize audible noise and vibration in medium-power fans. It features a PWM speed input for motor control and delivers high-efficiency operation with soft start, overcurrent, and short-circuit protection. The device is supplied in an 8-pin SOICN package without an exposed thermal pad, with an operating ambient temperature range of -40 to 105 °C and a maximum junction temperature of 150 °C. It includes a speed feedback output (FG) and a wide supply voltage range up to 18 V. The part uses an external 10 µF capacitor for VBB regulation and operates at a fixed 30 kHz oscillator frequency.
The A4945/A4949 offers quiet and efficient operation of medium-power fans, using sinusoidal drive to minimize audible noise and vibration. These sensorless drivers simplify design and reduce system complexity.
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Download Datasheet
Manufacturer: Allegro MicroSystems, LLC
Win Source Part Number: 858968-A4949GLTR-T
Features: Motor Driver
Package: Reel - TR
Family Name: A4949
Categories: Integrated Circuits (ICs)
ECCN: EAR99
Popularity: Medium
Fake Threat In the Open Market: 30 pct.
Supply and Demand Status: Limited
Quantity per package: 9000
MSL Level: 1 (Unlimited)
Estimated Pruduction Lead Time: 7 Weeks
REACH Status: REACH Unaffected
HTSUS: 8542.39.0001
IC FAN DRIVER BLDC SOT89-3 Product overview: A4949GLTR-T from Allegro MicroSystems is a Motor Driver IC for embedded motor control, robotics, automation equipment, haptic feedback, pumps, fans, and industrial motion systems. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include SOT89. Search-friendly keywords include motor driver IC, H-bridge, stepper motor, PWM control, motion control, SOT89, Motor Drivers, Controllers. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 744-A4949GLTR-T can be used for catalog matching and distributor lookup.
IC FAN DRIVER BLDC SOT89-3
Multiphase Motor Driver Power MOSFET PWM
IC FAN DRIVER BLDC SOT89-3
| Allegro MicroSystems Inc. | Win Source Electronics | ERSAELECTRONICS PTE. LTD. | Lingto Electronic Limited | Quarktwin Technology Ltd. | Shenzhen Shengyu Electronics Technology Limited | |
|---|---|---|---|---|---|---|
| Product Category | DC Motor Drives | Motion Controllers | DC Motor Drives | Motor Controllers | Motor Controllers | Motor Controllers |
| Product Number | A4949GLTR-T | 858968-A4949GLTR-T | 744-A4949GLTR-T | A4949GLTR-T | A4949GLTR-T | A4949GLTR-T |
| Product Name | Sensorless Sinusoidal Fan Driver | PMIC - PMIC - Motor Drivers, Controllers - A4949GLTR-T | SOT89 Motor Driver IC | PMIC - Motor Drivers, Controllers | Motor Drivers, Controllers | Integrated Circuits (ICs) - Power Management (PMIC) - Motor Drivers, Controllers |
| Motor / System | DC Brushless | DC Brushless; Brushless DC (BLDC) | ||||
| Configuration | PCB Mount | |||||
| PC-Based Bus | PWM |
