• A3977SLP-T 28-TSSOP-EP
A3977SLP-T 28-TSSOP-EP

A3977SLP-T

Stepper Motor Controller, 2.5A, NMOS, PDSO28, LEAD FREE, MO-153AET, TSSOP-28

Inventory:7,681

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Overview of A3977SLP-T

MICROSTEPPING DMOS DRIVER WITH TRANSLATORThe A3977xED and A3977xLP are complete microstepping motor drivers with built-in translator. They are 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.The translator is the key to the easy implementation of the A3977. By simply inputting one pulse on the STEP input the motor will take one step (full, half, quarter, or eighth depending on two logic inputs). 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 µP is unavailable or over-burdened.
FEATURES
■ ±2.5 A, 35 V Output Rating
■ Low rDS(on) Outputs, 0.45 Ω Source, 0.36 Ω Sink Typical
■ Automatic Current Decay Mode Detection/Selection
■ 3.0 V 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

Key Features

  • ±2.5 A, 35 V Output Rating
  • Low rDS(on) Outputs, 0.45 Ω Source, 0.36 Ω Sink Typical
  • Automatic Current Decay Mode Detection/Selection
  • 3.0 V 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

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Rohs Code Yes Part Life Cycle Code Obsolete
Ihs Manufacturer ALLEGRO MICROSYSTEMS LLC Part Package Code TSSOP
Package Description HTSSOP, TSSOP28,.25 Pin Count 28
Reach Compliance Code compliant ECCN Code EAR99
HTS Code 8542.39.00.01 Samacsys Manufacturer Allegro Microsystems
Additional Feature ALSO REQUIRES A 8V TO 35V SUPPLY Analog IC - Other Type STEPPER MOTOR CONTROLLER
JESD-30 Code R-PDSO-G28 JESD-609 Code e3
Length 9.7 mm Moisture Sensitivity Level 2
Number of Functions 1 Number of Terminals 28
Operating Temperature-Max 85 °C Operating Temperature-Min -20 °C
Output Current-Max 2.5 A Package Body Material PLASTIC/EPOXY
Package Code HTSSOP Package Equivalence Code TSSOP28,.25
Package Shape RECTANGULAR Package Style SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Cel) 260 Power Supplies 3.3/5,35 V
Qualification Status Not Qualified Seated Height-Max 1.2 mm
Supply Voltage-Max (Vsup) 5.5 V Supply Voltage-Min (Vsup) 3 V
Supply Voltage-Nom (Vsup) 5 V Surface Mount YES
Technology NMOS Temperature Grade OTHER
Terminal Finish Matte Tin (Sn) Terminal Form GULL WING
Terminal Pitch 0.65 mm Terminal Position DUAL
Time@Peak Reflow Temperature-Max (s) 40 Width 4.4 mm
Package Tube Product Status Obsolete
Motor Type - Stepper Bipolar Function Driver - Fully Integrated, Control and Power Stage
Output Configuration Half Bridge (4) Interface Logic
Step Resolution 1, 1/2, 1/4, 1/8 Applications General Purpose
Current - Output 2.5A Voltage - Supply 3V ~ 5.5V
Voltage - Load 8V ~ 35V Operating Temperature -20°C ~ 150°C (TJ)
Mounting Type Surface Mount Package / Case 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
Supplier Device Package 28-TSSOP-EP

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