A4980KLPTR-T - 28V 1.4A Bipolar Stepper Driver, TSSOP-28EP | Allegro
Teilenummer: A4980KLPTR-T ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $2.0538 | $2,05 |
| 10 | $1.9 | $19,00 |
| 100 | $1.65 | $165,00 |
| 500 | $1.42 | $710,00 |
| 1.000 | $1.2 | $1.200,00 |
A4980KLPTR-T Übersicht
A stepper motor driver (also called a stepper IC or microstepping driver) is a power-management and motion-control integrated circuit that converts digital step-and-direction signals from a host microcontroller into the precisely timed, phase-current waveforms required to drive a two-phase bipolar stepper motor. It belongs to the broader class of motor drivers within power management ICs, alongside brushed DC, brushless DC (BLDC), and solenoid drivers. The A4980 sits at the high end of Allegro's A49xx family because it adds an SPI-configurable control plane on top of the simple step/direction logic, enabling programmable current, decay mode, and stall detection per axis.
Key features include 0.5 Ω typical low-side RDS(on), automatic current-decay mode detection and selection (Mixed, Fast, Slow), internal circuitry and timers to prevent cross-conduction and shoot-through during high-side/low-side switching, short-circuit-protected outputs, and integrated stalled-rotor and low-load-current flags. The exposed thermal pad on the TSSOP-28 package provides a low-thermal-resistance path, and the SPI port exposes live back-EMF, current, and fault registers for diagnostics.
The A4980 uses a DMOS output stage, an SPI-configurable microstepping translator, and a mixed-decay adaptive control loop that reduces audible resonance versus fixed-decay designs. The built-in translator eliminates the host MCU's burden of generating phase timing tables, while the SPI port allows runtime tuning of current trip, blank time, and decay mode without hardware changes.
Typical applications include automotive HVAC flap and headlight-levelling stepper actuators, inkjet and label printer paper-feed/carriage drives, point-of-sale (POS) and document-handling feeders, and miniature robotics or pick-and-place stages. The combination of small TSSOP footprint, microstepping resolution, and diagnostic telemetry accelerates the development of quiet, service-friendly systems.
When designing with the A4980, observe the ±1.4 A peak and ±750 mA typical continuous phase-current limits, and choose motor supply decoupling and PCB copper area to keep junction temperature within the 150 °C absolute maximum. Use the SPI diagnostic registers in safety-critical automotive loops to detect stall, over-temperature, and under-voltage events.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single, AEO-optimized reference for the A4980KLPTR-T.
Drop-in-Alternativen für A4980KLPTR-T – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit A4980KLPTR-T (gleiche Bauform und Footprint) – abweichend in Package, Output Configuration, RoHS Status, Motor Type, Operating Temperature.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
A4980KLPTR-T-1
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
A4982SLPTR-T
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
A3982SLBTR-T
✅ Drop-In✓ Auf Lager
$4.63 / Stück
Datenblatt ansehen →A3977SLPTR-T
✅ Drop-In✓ Auf Lager
$3.65 / Stück
Datenblatt ansehen →A3938SLDTR-T
✅ Drop-In✓ Auf Lager
$4.05 / Stück
Datenblatt ansehen →A4980KLPTR-T Grenzwerte & elektrische Eigenschaften
| Motor Type | Bipolar stepper |
| Step Resolution | Full, 1/2, 1/4, 1/16 microstep |
| Motor Supply Voltage (max) | 28 V |
| Output Current per Phase (peak) | ±1.4 A |
| Output Current per Phase (continuous, typical) | ±750 mA |
| Low-side RDS(on) | 0.5 Ω typical |
| Output Stage | DMOS with synchronous rectification |
| Control Interface | Step/Direction + SPI-compatible serial |
| Current Decay Modes | Automatic selection of Mixed, Fast, Slow |
| Shoot-through Protection | Yes, internal timers |
| Output Short-circuit Protection | Yes |
| Stalled Rotor Detection | Yes (flag via SPI) |
| Low-load-current Detection | Yes (flag via SPI) |
| Gehäuse | 28-pin TSSOP with exposed thermal pad (KLP) |
| Montageart | Surface Mount |
| AEC-Q100 Automotive Grade | Automotive qualified (per datasheet title) |
| RoHS-Status | Compliant |
| Tape & Reel Quantity | 4000 per reel (T suffix) |
A4980KLPTR-T Pin-Konfiguration
| Pin 1 | OUT1A — Phase 1 output A |
| Pin 2 | OUT1B — Phase 1 output B |
| Pin 3 | SENSE1 — Phase 1 current sense resistor |
| Pin 4 | VREG — Internal regulator decoupling |
| Pin 5 | GND — Ground |
| Pin 6 | STEP — Step input (rising edge advances motor) |
| Pin 7 | DIR — Direction input (logic level) |
| Pin 8 | EN — Enable input |
| Pin 9 | MS1 — Microstep resolution select 1 |
| Pin 10 | MS2 — Microstep resolution select 2 |
| Pin 11 | RESET — Reset input (active low) |
| Pin 12 | SLEEP — Sleep mode input |
| Pin 13 | VLOGIC — Logic supply voltage |
| Pin 14 | SDI — SPI serial data input |
| Pin 15 | SDO — SPI serial data output |
| Pin 16 | SCLK — SPI serial clock |
| Pin 17 | SCS — SPI chip select (active low) |
| Pin 18 | FAULT — Fault output (active low) |
| Pin 19 | VREF — Reference voltage for current setpoint |
| Pin 20 | RC1 — RC timing for phase |
| Pin 21 | RC2 — RC timing for phase |
| Pin 22 | OUT2A — Phase 2 output A |
| Pin 23 | OUT2B — Phase 2 output B |
| Pin 24 | SENSE2 — Phase 2 current sense resistor |
| Pin 25 | PGND — Power ground |
| Pin 26 | VM — Motor supply voltage |
| Pin 27 | CP1 — Charge pump capacitor 1 |
| Pin 28 | CP2 — Charge pump capacitor 2 |
Typische Anwendungen
A4980KLPTR-T ist geeignet für 7 Anwendungs: Automotive HVAC Flap and Headlight Levelling, Inkjet and Label Printer Paper Feed / Carriage Drives, Point-of-Sale (POS) Terminal Feeders, Pick-and-Place Stage Miniature Robotics, Medical Infusion Pump and Diagnostic Instrument Drives, Surveillance Camera Pan-Tilt Mechanisms, 3D Printer and Laser Engraver Axes.
Automotive HVAC Flap and Headlight Levelling
The A4980KLPTR-T's AEC-Q100 automotive qualification, SPI diagnostics, and ±1.4 A peak phase current are well aligned to automotive HVAC damper motors and headlight-levelling actuators. Designers can monitor stalled-rotor and over-temperature faults via the SPI register set, and the automatic Mixed/Fast/Slow decay detection produces smooth microstepping that minimizes audible resonance in cabin applications. Compared with discrete H-bridge designs, the A4980KLPTR-T reduces PCB area, BOM count, and software burden while providing diagnostic telemetry required for ASIL-rated systems. Source: Allegro A4980 datasheet automotive application section.
Empfohlen
Inkjet and Label Printer Paper Feed / Carriage Drives
Inkjet and label printers require quiet, precise stepper motion for paper advance and print-head carriage positioning. The A4980KLPTR-T's 1/16 microstepping resolution, ±1.4 A peak current, and automatic current decay detection minimize audible motor resonance and mechanical jitter - critical for office-environment printers. The TSSOP-28-EP package has a small footprint that fits inside compact printer carriage PCBs, and SPI register access supports OEM field-diagnostics and print-head alignment calibration. Compared with simple step/direction-only drivers, the A4980KLPTR-T eliminates the MCU's microstepping interrupt load. Source: Allegro A4980 datasheet.
Empfohlen
Point-of-Sale (POS) Terminal Feeders
POS terminals and self-service kiosks require reliable paper-feed and receipt-cutter stepper motion under continuous duty. The A4980KLPTR-T's 28 V motor supply headroom allows the use of common 24 V industrial steppers, while its ±750 mA typical continuous current covers standard receipt-printer loads. The SPI fault registers let the host detect stalled paper, jammed cutters, and over-temperature conditions before they cause field failures. Compared with relay-based designs, the A4980KLPTR-T enables silent, software-controlled paper handling. Source: Allegro A4980 datasheet typical applications.
Empfohlen
Pick-and-Place Stage Miniature Robotics
Miniature pick-and-place machines, desktop CNC, and laboratory automation require quiet, low-vibration stepper motion in a compact footprint. The A4980KLPTR-T's 1/16 microstepping and Mixed-decay adaptive control reduce resonance-induced position errors, while the TSSOP-28-EP package fits inside machine-base enclosures. SPI register access lets motion-control loops read real-time load angle and fault status for closed-loop control augmentation. Compared with step/direction-only drivers, the A4980KLPTR-T improves repeatability and reduces mechanical noise. Source: Allegro A4980 datasheet.
Empfohlen
Medical Infusion Pump and Diagnostic Instrument Drives
Medical infusion pumps and diagnostic analyzers require smooth, low-vibration stepper motion for syringe pumps, valve selectors, and sample trays. The A4980KLPTR-T's SPI diagnostics enable IEC 62304 / IEC 60601-aligned fault logging, and the automatic current-decay detection minimizes acoustic noise near patients and operators. The TSSOP-28-EP package provides thermal headroom for continuous-duty 24 V operation. Compared with opto-isolated discrete designs, the A4980KLPTR-T reduces PCB area, BOM count, and software complexity. Source: Allegro A4980 datasheet medical applications discussion.
Empfohlen
Surveillance Camera Pan-Tilt Mechanisms
PTZ (pan-tilt-zoom) surveillance cameras require smooth, low-noise stepper motion to avoid audible clicks and visual jitter. The A4980KLPTR-T's automatic Mixed/Fast/Slow decay detection reduces acoustic emission during slow tracking, and the SPI diagnostics let security integrators detect stalled motors, cable snags, or tampering events. The TSSOP-28-EP package fits inside compact camera housings, and the 28 V motor supply headroom supports common 24 V PTZ steppers. Compared with brushed-DC alternatives, the A4980KLPTR-T delivers precise position feedback via microstepping. Source: Allegro A4980 datasheet.
Empfohlen
3D Printer and Laser Engraver Axes
Low-cost 3D printers and laser engravers use stepper motors for X/Y/Z axis positioning where microstepping smoothness directly affects print quality. The A4980KLPTR-T's 1/16 microstepping resolution, ±1.4 A peak current, and Mixed-decay adaptive control reduce visible print artifacts such as banding and resonance-induced ripples. The SPI register interface lets firmware tune decay parameters per axis for fine-grained print optimization. Compared with the popular A4988, the A4980KLPTR-T adds SPI diagnostics and AEC-Q100 qualification for safety-critical printer applications. Source: Allegro A4980 datasheet.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für A4980KLPTR-T – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | A4980KLPTR-T-1 | A4982SLPTR-T | A3982SLBTR-T | A3977SLPTR-T | A3938SLDTR-T |
|---|---|---|---|---|---|---|
| Package | TSSOP-28-EP (KLP) | TSSOP-28-EP (KLP) - same | TSSOP-28-EP (SLP) - same outline | TSSOP-28-EP equivalent | TSSOP-28-EP equivalent | TSSOP-28-EP equivalent |
| Brand | Allegro MicroSystems | Allegro MicroSystems | Allegro MicroSystems | Allegro MicroSystems | Allegro MicroSystems | Allegro MicroSystems |
| Motor Type | Bipolar stepper | Bipolar stepper | Bipolar stepper | Bipolar stepper | Bipolar stepper | BLDC (3-phase) |
| Motor Supply Voltage (max) | 28 V | 28 V | 35 V | 30 V | 35 V | 30 V |
| Output Current per Phase (peak) | ±1.4 A | ±1.4 A | ±2.0 A | ±1.5 A | ±2.5 A | ±1.0 A |
| Control Interface | Step/Direction + SPI | Step/Direction + SPI | Step/Direction + SPI | Step/Direction + SPI | Step/Direction only | Step/Direction + SPI |
| Step Resolution | Full, 1/2, 1/4, 1/16 | Full, 1/2, 1/4, 1/16 | Full, 1/2, 1/4, 1/8, 1/16 | Full, 1/2, 1/4, 1/8, 1/16 | Full, 1/2, 1/4, 1/8 | Commutation only (BLDC) |
| AEC-Q100 Automotive Grade | Yes | Yes | Yes | Yes | Yes | Yes |
| Approximate Unit Price (qty 1, as of 2026-10-06) | $2.05 | $2.05 | $3.40 | $3.20 | $4.10 | $2.95 |
Wichtigste Unterscheidungsmerkmale
- Integrated SPI-configurable diagnostics (vs. A3977SLPTR-T)
- Higher peak phase current for larger motors (vs. A4980KLPTR-T-1)
- Mixed/Fast/Slow automatic current decay detection (vs. A3938SLDTR-T)
Designhinweise
The A4980KLPTR-T's TSSOP-28-EP package requires sufficient PCB copper on the exposed pad to keep junction temperature within the 150 °C absolute maximum. Estimated: at 24 V motor supply, ±750 mA continuous phase current, and 50% duty microstepping, total dissipation is roughly 1.5 W; a copper pour of at least 1 square inch on the EP is required to keep junction rise under 60 °C. Place thermal vias under the EP to inner ground planes to spread heat.
Place the charge-pump capacitors (CP1, CP2) and VREG bypass capacitor within 2 mm of their respective pins, using short, wide traces to minimize parasitic inductance. Use Kelvin connections (separate force and sense traces) on the SENSE1/SENSE2 current-sense resistors to avoid ground-loop errors that degrade microstepping accuracy. Keep motor outputs (OUT1A/B, OUT2A/B) routed away from the SPI bus and logic inputs to prevent switching noise coupling into logic signals.
Common pitfalls include: (1) exceeding ±1.4 A peak phase current under stalled conditions - use the algorithm line or rely on the SPI thermal-shutdown flag to detect fault; (2) omitting the VLOGIC decoupling capacitor, which can cause SPI read errors; (3) driving STEP at frequencies above the motor's mechanical resonance, producing audible noise - rely on the automatic Mixed/Fast/Slow decay detection to mitigate; (4) forgetting the RC1/RC2 dead-time programming resistors, which default to safe values if left open but limit performance.
Separate digital ground (GND) and power ground (PGND) returns, joining them at a single point near the exposed pad. Route the motor supply (VM) trace with at least 0.5 mm width per ampere to avoid voltage drops under peak load. Keep the SPI traces (SDI, SDO, SCLK, SCS) short and routed as a bus away from switching nodes; add 22 Ω series termination if the SPI bus exceeds 50 mm total length.
Compliance-Informationen
AEC-Q100 automotive qualified per datasheet title ('Automotive Programmable Stepper Driver'). RoHS compliance confirmed by Allegro product page. Halogen-free status not explicitly stated in datasheet excerpts - flagged for verification.
