Allegro has unveiled a new quad DMOS full-bridge driver chip capable of driving up to two stepper motors or four DC motors. The AMT49701 was designed specifically for dual axis, point-of-sale, office automation, security, surveillance, IP cameras, as well as industrial automation applications.
The chip claims reduced audible motor noise, increased step accuracy, and reduced power dissipation, according to the company.
Internal synchronous rectification control circuitry is provided to improve power dissipation during PWM operation.
Protection features include thermal shutdown with hysteresis, undervoltage lockout (UVLO) and crossover-current protection. Special power-up sequencing is not required.
The AMT49701 is supplied in an EV package, a 6 mm × 6 mm, 36-pin QFN package with a nominal overall package height of 0.90 mm, and with an exposed thermal pad for enhanced thermal performance. The package is lead (Pb) free, with 100% matte-tin leadframe plating.
The AMT49701 is priced at $1.19 in quantities of 1,000.
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