The A3916 device is designed for pulse-width-modulated (PWM) control of low voltage stepper motors or dual DC motors using four external components, and is capable of output currents of up to 1A per channel and operating voltages from 2.7 to 15V.
The A3916 integrates all motor control circuitry including a fixed off-time PWM regulator that sets a peak current in the motor winding based on the selection of a low value current-sense resistor.
A single supply is said to eliminate the need for an external low-dropout regulator, and the integrated charge pump requires only one external capacitor. Output diagnostics are provided by an active low fault output that notifies the user of a thermal shutdown or overcurrent protection event.
The device is targeted at applications that run off single, Li-ion cell or 3AA batteries, including office and industrial automation systems, 3D printers, medical, CCTV and the toy market.
Two package options are offered: a 3 × 3mm 16-terminal QFN and a drop-in replacement for the A3916 in a 4 × 4mm 20-terminal QFN. Both products have an exposed power tab for enhanced thermal dissipation.
