A3957 - FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER

Allegro

A3957 Datasheet Preview — Preview of A3957 PDF

Datasheet Details

Part number	A3957
Manufacturer	Allegro
File Size	473.00 KB
Description	FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER
Datasheet	A3957-Allegro.pdf

A3957 Product details

Description

Slow Current-Decay Mode Mixed Current-Decay Mode Fast Current-Decay Mode Table 3 DAC Truth Table DAC Data D3 D2 D1 D0 HHHH HHH L HH L H HHL L H L HH HLHL HL LH HL L L L HHH L HH L LHLH LHL L L LHH L LHL LLLX Current Ratio, % 100 VREF/VS 3.00 95.7 3.13 91.3 3.29 87.0 3.45 82.6 3.64 78.3 3.83 73.9 4.07 69.6 4.31 60.9 4.93 52.2 5.74 43.5 6.90 34.8 8.62 26.1 11.49 17.4 17.24 All Outputs Disabled where VS = ITRIP RS.

Features

±1.5 A Continuous Output Current.
50 V Output Voltage Rating.
Internal PWM Current Control.
4-Bit Non-Linear DAC for 16-Bit Microstepping.
Satlington® Sink Drivers.
Fast, Mixed Fast/Slow, and Slow Current-Decay Modes.
Internal Transient-Suppression Diodes.
Internal Thermal-Shutdown Circuitry.
Crossover-Current and UVLO Protection Under any set of conditions, do not exceed the specified current rating or a junction temperature of 150°C. † Per SEMI.

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Published: Oct 16, 2018 |