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ALLEGRO A3977SLPTR-T product image
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ALLEGRO A3977SLPTR-TRoHS

Manufacturer
ALLEGRO
MPN
A3977SLPTR-T
LCSC Part #
C163514
Packaging
TSSOP-28-EP
Customer #
Key Attributes
Microstepping DMoS Driver with Translator
Datasheetpdf iconALLEGRO A3977SLPTR-T
In-Stock: 878
878 In stock, ships now
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QtyUnit PriceTotal Amount
1+$ 3.4172$ 3.42
10+$ 2.8956$ 28.96
30+$ 2.5853$ 77.56
100+$ 2.2717$ 227.17
500+$ 2.1287$ 1064.35
1,000+$ 2.0621$ 2062.10
Standard Packaging4000/Full Reel
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Motor Drivers, Controllers
ManufacturerALLEGRO
PackagingTSSOP-28-EP
Drive TypeBipolar Driver
Number of H-bridges2
FeaturesMotor step-out prevention function;Power-on reset;Overcurrent Protection;Over temperature protection;Under-voltage lockout;Built-in charge pump;Dead-time / shoot-through protection
TechnologyYes
Operating temperature-20℃~+85℃
Output Current2.5A
Step Resolution1;2;4;8
Control Voltage3V~5.5V
RDS(on)500mΩ
Motor Drive Voltage(Vm)8V~35V
InterfaceSTEP/DIR
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging4000
Sales UnitPiece

Introduction

AI Translation
  • ±2.5 A, 35 V output rating
  • Low RDS(on) outputs, 0.28 Ω source, 0.22 Ω sink typical
  • Automatic current decay mode detection/selection
  • 3.0 to 5.5 V logic supply voltage range
  • Mixed, fast, and slow current decay modes
  • Home output
  • Synchronous rectification for low power dissipation
  • Internal UVLO and thermal shutdown circuitry
  • Crossover - current protection
  • 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 current - decay control scheme results in reduced audible motor noise, increased step accuracy, and reduced power dissipation.
  • The translator is the key to the easy implementation of the A3977. Simply inputting one pulse on the STEP input drives the motor one step (two logic inputs determine if it is a full -, half -, quarter -, or eighth - step). There are no phase - sequence tables, high - frequency control lines, or complex interfaces to program. The A3977 interface is an ideal fit for applications where a complex microprocessor is unavailable or overburdened.
  • Internal synchronous - rectification control circuitry is provided to improve power dissipation during PWM operation.
  • Internal circuit protection includes thermal shutdown with hysteresis, undervoltage lockout (UVLO), and crossover - current protection. Special power - up sequencing is not required.
  • The A3977 is supplied in a thin <1.2 mm 28 - pin TSSOP with an exposed thermal pad (suffix LP). The A3977 is lead (Pb) free, with 100% matte tin leadframe plating.