A3938SLDT vs A3938SLDTR-T Comparison
Detailed side-by-side comparison of A3938SLDT by Allegro MicroSystems and A3938SLDTR-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
A3938SLDT - 50V Three-Phase BLDC MOSFET Controller | Allegro
A3938SLDT ✓ ActiveAllegro MicroSystems
A3938SLDTR-T - 3-Phase BLDC MOSFET Controller, 50V | Allegro
A3938SLDTR-T ✓ ActiveSpecification Comparison
| Parameter | A3938SLDT | A3938SLDTR-T |
|---|---|---|
| Brand | Allegro MicroSystems | Allegro MicroSystems |
| Category | Motor Drivers | Motor Drivers |
| Lifecycle Status | Active | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $3.95 | $4.05 |
| Function | Three-Phase BLDC Motor Controller / MOSFET Gate Driver | Three-phase BLDC motor controller / MOSFET gate driver |
| Motor Type | Brushless DC (BLDC), three-phase | — |
| Motor Supply Voltage | Up to 50 V | 18 V to 50 V |
| Output Configuration | Six N-channel MOSFET gate drivers (3 high-side + 3 low-side) | Pre-driver for N-channel MOSFETs (high-side + low-side) |
| High-Side Drive | Bootstrapped with integrated bootstrap management | Bootstrap with internal bootstrap diode |
| Logic Input Compatibility | 3.3 V / 5 V CMOS logic | — |
| Dead Time | Programmable (per datasheet) | — |
| Undervoltage Lockout (UVLO) | Logic and gate-drive rails | — |
| Thermal Shutdown | Yes (internal) | — |
| Operating Temperature | -40C to +85C (TB075 suffix SLD) [DATA_NEEDED: confirm exact temp grade from datasheet] | -20C to +85C (industrial range per datasheet) |
| Package | 38-pin TSSOP with exposed thermal pad (LD suffix) | 38-pin TSSOP (LD) |
| Mounting Type | Surface Mount | Surface Mount |
| MSL Level | [DATA_NEEDED: confirm from datasheet] | — |
| RoHS Status | Compliant (per distributor listings) | Compliant (per Alldatasheet listing) |
| PWM Frequency | Up to [DATA_NEEDED] kHz (verify in datasheet) | — |
| Topology | — | Three-phase, 6-step PWM / synchronous rectification |
| Number of Outputs | — | 3 half-bridge gate drive channels |
| Synchronous Rectification | — | Yes (low-side) |
| Dead Time Adjustment | — | Adjustable (external resistor) |
| MOSFET Protection | — | Cross-conduction / shoot-through protection |
| PWM Input | — | Logic-level compatible |
| Packaging | — | Tape & Reel (TR) |