Solid State Supplies adds quad, full bridge motor driver IC
A quad DMOS, full-bridge driver IC has been added to the motion control portfolio by Solid State Supplies. The A5988 from Allegro MicroSystems is targeted at office automation, surveillance and consumer electronics implementation. It is suitable to place on either 3.3 or 5V voltage rails. With a 1.6A rating for each of its full-bridge outputs and a maximum load supply of 40V, it has the capacity to simultaneously drive up to four DC motors, or alternatively two stepper motors.
The IC incorporates fixed off-time PWM (pulse-width modulation) current regulators (based on patented mixed decay mode technology), along with 2bit, non-linear DACs. The IC can control stepper motors in full, half and quarter steps as required and control DC motors in forward, reverse and coast modes. The proprietary mixed decay mode technology and integral synchronous rectification control circuitry, are claimed to lead to marked reductions in audible motor noise compared to competing devices. The IC increases step accuracy and lowers power dissipation, while consuming only 100microA (typical) in sleep mode for lower power operation. Special power-up sequencing processes are not required.
Key applications are security equipment, scanners, PoS units and printers. Protection mechanisms include thermal shutdown, under-voltage lockout, over-current and current cross-over protection.
Operating temperature range is -40 to +105 degree C. It is offered in two package formats, both of which have exposed power tabs in order to deliver elevated levels of heat dissipation. The EV version has a low-profile, 36pin QFN package with a 6.0 x 6.0mm footprint, while the JP version is a 48pin LQFP covering 7.0 x 7.0mm.