A3941KLPTR-T
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 2 (1 Year) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 28-TSSOP (0.173", 4.40mm Width) Exposed Pad |
| Interface | PWM |
| Mfr | Allegro MicroSystems |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 150°C (TA) |
| Technology | Power MOSFET |
| Applications | Automotive |
| Current - Output | - |
| Supplier Device Package | 28-TSSOP-EP |
| Output Configuration | Pre-Driver - Half Bridge (2) |
| Function | Controller - Commutation, Direction Management |
| Voltage - Supply | 5.5V ~ 50V |
| Voltage - Load | - |
| Motor Type - Stepper | - |
| Motor Type - AC, DC | Brushed DC |
| Step Resolution | - |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | A3941 |
| REACH Status | REACH Unaffected |
| Standard Package | 4,000 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
A3941KLPTR-T N-channel MOSFET driver
A3941KLPTR-T is an automotive-qualified full-bridge N-channel MOSFET driver from Allegro MicroSystems that integrates high-side bootstrap, cross-conduction protection and programmable dead-time in 28-TSSOP-EP package, delivering up to 50 V gate-drive capability for 12 V / 24 V motor, solenoid and relay applications. Operating from 5.5 V to 50 V supply, it sources/sinks 1 A gate current, achieving 90 ns typical turn-off delay and < 20 ns matched propagation skew, enabling switching frequencies up to 500 kHz with minimal shoot-through loss while meeting AEC-Q100 Grade-0 (–40 °C to +150 °C) requirements without external level-shifters .
The device provides two bootstrap pins with integrated 80 V diodes, allowing 100 % duty-cycle on high-side MOSFETs and eliminating discrete HV capacitors; programmable dead-time (50 – 500 ns) and cross-conduction lockout prevent simultaneous conduction, cutting EMI and power loss in inductive loads. Internal VGS clamp (15 V), undervoltage lock-out on both gate supplies and cycle-by-cycle over-current limit via external sense resistor protect external FETs and load, while a TTL-compatible enable, direction and PWM inputs accept 3.3 V MCU signals directly, simplifying BOM and PCB routing in space-constrained ECUs.
Alternative full-bridge MOSFET driver Models
● Infineon BTN8982TA – 40 V, 55 A half-bridge with current-sense, SOIC-20, suits high-current window-lift or fan bridges.
● STMicroelectronics L9907 – 28 V, dual 0.5 A gate driver with SPI diagnostics, TQFP-32, for safety-critical EPS.
● onsemi NCV7719DPR2G – octal 35 V, 1 A low-side driver with serial control, SOIC-28, ideal for relay banks.
● TI DRV8703-Q1 – 45 V, 4 A H-bridge gate driver with current-regulation and SPI, TSSOP-32, targeting BLDC seat pumps.
● Rohm BD62F850-M – 40 V, 2.5 A, dual H-bridge driver with built-in diodes and current limit, HTSSOP-24, for compact mirror or valve drives.
