A3984SLP-T

ALLEGRO MICROSYSTEMS  A3984SLP-T  芯片, 电机驱动器, 双路, 1.5A, TSSOP24

The is a DMOS Micro-stepping Driver with built in translator. The driver is designed to operate bipolar stepper motors in full, half, quarter and eighth-step modes, with output drive capacity of 35V and ±2A. It includes a fixed off-time current regulator that has the ability to operate in slow or mixed decay modes. It is an ideal fit for applications where a complex microprocessor is unavailable or is overburdened. The translator is the key to the easy implementation, by simply inputting one pulse on the STEP input drives the motor one micro-step. The chopping control automatically selects the current decay mode slow or mixed. When a signal occurs at the STEP input pin, driver determines if that step results in a higher or lower current in each of the motor phases. Internal circuit protection includes thermal shutdown with hysteresis, under-voltage lockout UVLO and cross over-current protection.

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Low RDS ON outputs

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Automatic current decay mode detection/selection

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Synchronous rectification for low power dissipation

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-20 to 85°C Ambient temperature range