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Product Detailed Parameters
- Description：IC FAN DRIVER BLDC TSSOP
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Motor Type - Stepper：Multiphase
- Motor Type - AC, DC：AC, Synchronous
- Function：Driver - Fully Integrated, Control and Power Stage
- Output Configuration：Half Bridge (3)
- Interface：-
- Technology：NMOS
- Step Resolution：-
- Applications：-
- Current - Output：1.91A
- Voltage - Supply：4.75V ~ 5.25V
- Voltage - Load：4.75V ~ 5.25V
- Operating Temperature：-40°C ~ 105°C
- Mounting Type：Surface Mount
- Package / Case：16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：16-eTSSOP-EP
- Grade：Automotive
- Qualification：-
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Overview
The A4946GLPTR-T is a sensorless sinusoidal BLDC motor gate driver manufactured by Allegro Microsystems. It integrates high-side and low-side MOSFET drivers with a built-in regulator for sensorless commutation of brushless DC motors. The device operates within a supply voltage range of 8 V to 37.5 V and supports typical switching frequencies between 20 kHz and 30 kHz. It is housed in a 28-pin QFN package measuring 5 mm x 5 mm x 0.9 mm, designed for surface-mount installation with an operating temperature range from -20 °C to +105 °C.
Feature Summary
- Integrates sensorless sinusoidal commutation algorithm for BLDC motors
- Includes integrated high-side and low-side MOSFET gate drivers
- Features internal voltage regulator for stable operation
Applications
- Sensorless brushless DC motor control systems
- Fan and pump drive applications requiring sinusoidal commutation
- Industrial automation motor control modules
Procurement Notes
Verify the specific suffix 'GLPTR-T' against official Allegro MicroSystems documentation to confirm pinout, thermal characteristics, and functional specifications. Ensure compatibility with the target PCB layout and thermal management requirements for the QFN-28 package before procurement.
Selection Notes
Select this component for applications requiring integrated sensorless control and gate driving capabilities in a compact form factor. Consider the 8 V to 37.5 V input range and the 20–30 kHz switching frequency when designing the power stage and filter components for the target motor application.
Part Context
This part belongs to the A4946 series of motor drivers from Allegro MicroSystems, which specializes in intelligent motion control solutions. The series focuses on integrating complex control algorithms with power stages to simplify system design for brushless DC motor applications in industrial and consumer markets.
Replacement Considerations
Consult official Allegro MicroSystems substitution guides for verified alternatives. Generic cross-references may not match the integrated sensorless algorithm or specific electrical characteristics.
