The new A4992 from Allegro MicroSystems Europe is a single-chip microstepping motor driver with a built-in translator that simplifies operation by minimising the need for external control circuitry. The new device is targeted at the automotive and industrial markets, with end applications including automotive adaptive headlamp systems, idle bypass valve positioning, HVAC vent position systems, EGR valves and satellite, solar panel and CCTV positioning systems.
The A4992 is designed to operate bipolar stepper motors in full, half, quarter and eighth step modes at up to 28 V. At power-on, the A4992 is configured to drive most small stepper motors with simple step and direction inputs. It operates over a supply voltage range from 3.5 to 50 V. The current regulator in the A4992 operates with fixed-frequency pulse-width modulation, and uses adaptive mixed current decay to reduce audible motor noise and increase step accuracy.
Allegro MicroSystems Europe
+33 (0) 4 505 12359
