A3977

motor driver, 44-PLCC, 35 V

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Price:: US $0.45~0.69 / piece [Get Latest Price]

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	US $0.45~0.69

PartNumber:: A3977

Brand:: Allegro MicroSystems - Allegro | Pack: DIP | D/C: 11+

Availability:: Supply Ability: 10000/Week Can Ship Immediately
Delivery: 10-15 Business Days (ships out within 3 Business days)

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Products Upload time: 2012-01-13

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Part Number:A3977
US $0.45 - 0.69
HCPL-7800A

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Product Summary

The A3977 is a complete microstepping motor driver with built-in translator. It is designed to operate bipolar stepper motors in full-, half-, quarter-, and eighth-step modes, with output drive capability of 35 V and ±2.5 A. The A3977 includes a fixed off-time current regulator that has the ability to operate in slow-, fast-, or mixed-decay modes. This currentdecay control scheme results in reduced audible motor noise, increased step accuracy, and reduced power dissipation.

Parametrics

A3977 absolute maximum ratings: (1)Load Supply Voltage, VBB: 35 V; (2)Output Current, IOUT: ±2.5 A*; (3)Logic Supply Voltage, VDD: 7.0 V; (4)Logic Input Voltage Range, VIN (tw >30 ns): -0.3 V to VDD + 0.3 V, (tw <30 ns): -1 V to VDD + 1 V; (5)Sense Voltage, VSENSE: 0.5 V; (6)Reference Voltage, VREF: VDD; (7)Operating Temperature Range, TA: -40℃ to +125℃; (8)Junction Temperature, TJ: +150℃; (9)Storage Temperature Range, TS: -55℃ to +150℃.

Features

A3977 features: (1)±2.5 A, 35 V Output Rating; (2)Low rDS(on) Outputs, 0.45 Ω Source, 0.36 Ω Sink Typical; (3)Automatic Current Decay Mode Detection/Selection; (4)3.0 V to 5.5 V Logic Supply Voltage Range; (5)Mixed, Fast, and Slow Current Decay Modes; (6)Home Output; (7)Synchronous Rectification for Low Power Dissipation; (8)Internal UVLO and Thermal Shutdown Circuitry; (9)Crossover-Current Protection.