CODING INTERNATIONAL CO LTD

Allegro MicroSystems Corporation announces a whole new full-bridge motor driver made to drive low-voltage, brushless DC engines. Allegro’s A1448 is designed to allow the individual to control several capabilities with a single input control pin. The actual pin allows for primary input PWM for velocity control, is used to initiate the productive braking function to relieve motor stop time, and acts as a great enable pin to engage micro-power sleep mode to reduce average power ingestion when not in use. This brand-new device is targeted at the particular communications and place of work automation markets. It’s designed for use in vibration motor applications inside portable devices that need fast stop commence cycles, such as haptic apps and vibration ringers.

The integrated Corridor sensor used to identify the rotational place of an alternating-pole ring magnetic field achieves motor commutation. A higher density CMOS semiconductor process allows the integration of all the necessary electronics. This includes the actual Hall sensor, the particular motor control build, and the full output bridge. Low-voltage design techniques have been employed to achieve full device operation down to 1.8 V VDD.

This completely integrated single chips solution provides increased reliability (including reverse battery protection along with output short routine protection) and gets rid of the need for any outside support components. The A1448 also employs any soft-switching algorithm to reduce audible switching noise along with EMI interference, making this device in BLDC motors more advanced than existing brush generator solutions.

A tiny power sleep setting can be initiated for the CONTROL pin to reduce current consumption pertaining to battery management within portable electronic devices. This feature allows for the removal of any FET transistor for switching the unit on and off.

Allegro’s DFN (EW) package could be the thinnest in the industry which has a 0.4 mm maximum thickness which allows for very slim BLDC coin motor models. The small package summarize and low account make this device ultimately suited for use in programs where printed circuit board location and component headroom are near a premium.