Each full-bridge output is rated up to 1 A and 18 V. This new controller includes fixed off-time PWM (Pulse-width Modulation) current regulators, along with 2-bit nonlinear DACs (digital-to-analog converters) that enable stepper motors to be controlled in full, half, and quarter steps, and DC motors in forward, reverse, and coast modes. The PWM current regulator utilizes Allegro's patented mixed decay mode to reduce audible motor noise, increase step accuracy, and reduce power dissipation.
Internal synchronous rectification control circuitry is provided to further improve power dissipation during PWM operation. Protection features include thermal shutdown with hysteresis, undervoltage lockout (UVLO), and cross-current protection. No special power-up sequence is required.
The AMT49701 is supplied in an EV package, a 6 mm × 6 mm, 36-pin QFN package with a nominal overall height of 0.90 mm and an exposed thermal pad for improved thermal performance. The package is lead-free (Pb) with 100% matte tin-plated lead plating.
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- Category: Integrated Circuits
Full-bridge quad PWM motor driver IC for applications with a maximum supply voltage of 18V
Allegro MicroSystems Europe has introduced a new quad DMOS full-bridge controller capable of controlling up to two stepper motors or four DC motors. The AMT49701 was specifically designed for dual-axis, point-of-sale, office automation, security, surveillance, IP camera, and industrial automation applications.
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