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ALLEGRO A3979SLPTR-T product image
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ALLEGRO A3979SLPTR-TRoHS

Manufacturer
ALLEGRO
MPN
A3979SLPTR-T
LCSC Part #
C34468
Packaging
HTSSOP-28
Customer #
Key Attributes
DMoS Microstepping Driver with Translator
Datasheetpdf iconALLEGRO A3979SLPTR-T
In-Stock: 503
503 In stock, ships now
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QtyUnit PriceTotal Amount
1+$ 4.0189$ 4.02
10+$ 3.4466$ 34.47
30+$ 2.8403$ 85.21
100+$ 2.4966$ 249.66
500+$ 2.3378$ 1168.90
1,000+$ 2.2664$ 2266.40
Standard Packaging1000/Full Reel
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Motor Drivers, Controllers
ManufacturerALLEGRO
PackagingHTSSOP-28
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℃
Step Resolution16
Output Current2.5A
Control Voltage3V~5.5V
RDS(on)280mΩ
Motor Drive Voltage(Vm)8V~35V
InterfaceSTEP/DIR
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging1000
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
  • Slow, Fast or Mixed current decay modes
  • Home output
  • Synchronous rectification for low power dissipation
  • Internal UVLO and thermal shutdown circuitry
  • Crossover-current protection
  • The A3979 is a complete microstepping motor driver with built-in translator, designed as a pin-compatible replacement for the successful A3977, with enhanced microstepping (1/16 step) precision. It is designed to operate bipolar stepper motors in full-, half-, quarter-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2.5 A. The A3979 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 A3979. It allows the simple input of one pulse on the STEP pin to drive the motor one microstep, which can be either a full step, half, quarter, or sixteenth, depending on the setting of the MS1 and MS2 logic inputs. There are no phase-sequence tables, high-frequency control lines, or complex interfaces to program. The A3979 interface is an ideal fit for applications where a complex microprocessor is unavailable or is overburdened.
  • Internal synchronous-rectification control circuitry is provided to improve power dissipation during PWM operation. Internal circuit protection includes: thermal shutdown with hysteresis, UVLO (undervoltage lockout), and crossover-current protection. Special power-on sequencing is not required.
  • The A3979 is supplied in a low-profile (height ≤ 1.20 mm), 28-pin TSSOP with exposed thermal pad. The package is lead (Pb) free, with 100% matte tin leadframe plating.

Features

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
  • Slow, Fast or Mixed current decay modes
  • Home output
  • Synchronous rectification for low power dissipation
  • Internal UVLO and thermal shutdown circuitry
  • Crossover-current protection