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A1448 Datasheet - Allegro

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Description
MFG CO.
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Description
The A1448 is a full-bridge motor driver designed to drive low-voltage, brushless DC motors. The device is designed to allow the user to control several functions with a single input control pin. The pin allows for direct input PWM for speed control, is used to initiate the active braking function to reduce motor stop time, and acts as an enable pin to engage micro-power sleep mode to reduce average power consumption when not in use. The A1448 is designed for use in vibration motor applications in portable devices that require fast stop-start cycles, such as haptic applications and vibration ring tones.

Features and Benefits
▪Low-voltage operation, 1.8 to 4.2 V
▪Multifunction CONTROL pin input:
▫Direct input PWM for speed control
▫Active braking for fast stop cycle
▫Sleep function to reduce average power consumption
▪Reverse voltage protection on VDD and CONTROL pins
▪Output thermal shutdown protection for robust performance
▪Soft switching algorithm to reduce audible switching noise and EMI
▪Hall chopper stabilization technique for precise signal response over operating range
▪Antistall feature guarantees continuous rotation and prevents overheating
▪Single-chip solution for high reliability
▪Miniature MLP/DFN package with industry-leading 0.40 mm maximum overall thickness

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