Product News: Controls & Controllers
Motor Driver IC includes built-in translator.
Press Release Summary:
October 18, 2013 - Supplied in 20-pin TSSOP package, Model A4992 operates bipolar stepper motors in full, half, quarter, and eighth step modes at up to 28 V. Unit includes stall detect features and advanced diagnostics that can be configured through serial interface. Current regulator, operating with fixed frequency PWM, uses adaptive mixed current decay to minimize audible motor noise and maximize step accuracy. Current in each phase of motor is controlled through DMOS full-bridge using synchronous rectification.
Original Press Release
Allegro MicroSystems, LLC Adds a New Motor Driver IC to Their Step And Direction Portfolio
Press release date: October 1, 2013
The current regulator operates with fixed frequency PWM and uses adaptive mixed current decay to reduce audible motor noise and increase step accuracy. The current in each phase of the motor is controlled through a DMOS full-bridge using synchronous rectification to improve power dissipation. Internal circuits and timers prevent cross conduction and shoot through when switching between high-side and low-side drives.
The outputs are protected from short circuits and features for low load current and stalled rotor detection are included. Chip level protection includes hot thermal warning, over temperature shutdown, overvoltage and under voltage lockout. An optional serial interface mode, using the STEP, DIR and MS inputs, can be used to configure several motor control parameters and diagnostics.
The A4992KLPTR-T is supplied in a 20-pin TSSOP power package with an exposed thermal pad (package type LP). This package is lead (Pb) free with 100% matte-tin lead frame plating. It is priced at $1.70 in quantities of 1,000.
Allegro MicroSystems, LLC is a leader in developing, manufacturing and marketing high-performance semiconductors. Allegro's innovative solutions serve high-growth applications within the automotive market, with additional focus on office automation, industrial, and consumer/communications solutions. Allegro is headquartered in Worcester, Massachusetts (USA) with design, applications, and sales support centers located worldwide. Further information about Allegro can be found at www.allegromicro.com.
Contact information: Stephanie Fennelly, Allegro MicroSystems, P.O. BOX 15036, Worcester, MA 16150036