A3938SLDTR-T vs A4980KLPTR-T Comparison
Detailed side-by-side comparison of A3938SLDTR-T by Allegro MicroSystems and A4980KLPTR-T by Allegro MicroSystems. Compare key specifications, electrical parameters, packaging, lifecycle status, pricing, and availability to determine the best component for your design requirements.
Allegro MicroSystems
A3938SLDTR-T - 3-Phase BLDC MOSFET Controller, 50V | Allegro
A3938SLDTR-T ✓ ActiveAllegro MicroSystems
A4980KLPTR-T - 28V 1.4A Bipolar Stepper Driver, TSSOP-28EP | Allegro
A4980KLPTR-T ✓ ActiveSpecification Comparison
| Parameter | A3938SLDTR-T | A4980KLPTR-T |
|---|---|---|
| Brand | Allegro MicroSystems | Allegro MicroSystems |
| Category | Motor Drivers | Motor Drivers |
| Lifecycle Status | Active | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $4.05 | $1.20 |
| Function | Three-phase BLDC motor controller / MOSFET gate driver | — |
| Motor Supply Voltage | 18 V to 50 V | — |
| Topology | Three-phase, 6-step PWM / synchronous rectification | — |
| Number of Outputs | 3 half-bridge gate drive channels | — |
| Output Configuration | Pre-driver for N-channel MOSFETs (high-side + low-side) | — |
| High-Side Drive | Bootstrap with internal bootstrap diode | — |
| Synchronous Rectification | Yes (low-side) | — |
| Dead Time Adjustment | Adjustable (external resistor) | — |
| MOSFET Protection | Cross-conduction / shoot-through protection | — |
| PWM Input | Logic-level compatible | — |
| Package | 38-pin TSSOP (LD) | 28-pin TSSOP with exposed thermal pad (KLP) |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Tape & Reel (TR) | — |
| Operating Temperature | -20C to +85C (industrial range per datasheet) | — |
| RoHS Status | Compliant (per Alldatasheet listing) | Compliant |
| 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) |
| Operating Temperature Range | — | [DATA_NEEDED: operating temperature range] |
| AEC-Q100 Automotive Grade | — | Automotive qualified (per datasheet title) |
| Tape & Reel Quantity | — | 4000 per reel (T suffix) |