AutoChips Motor Driver ICs

AutoChips motor driver ICs support various motor types used in automotive applications. Brushless DC (BLDC) motor drivers support trapezoidal and sinusoidal commutation for high-efficiency fan and pump applications. 3-phase motor drivers with FOC (Field Oriented Control) support provide precise torque control for electric power steering and traction motors. Stepper motor drivers offer precise position control for HVAC flap actuators and headlight leveling systems. The drivers include integrated commutation logic or support external MCU control for flexible system design.

Select BLDC drivers for fans and pumps, 3-phase drivers for power steering, stepper drivers for position control.

AutoChips motor driver ICs provide integrated gate drive circuits with programmable drive strength to optimize switching performance. Gate drive voltage is typically 10-15V for optimal MOSFET/IGBT switching. Programmable source and sink currents allow tuning for different power device characteristics and EMC requirements. Integrated bootstrap diodes and charge pumps support high-side gate drive for 100% duty cycle operation. Dead-time insertion prevents shoot-through conditions in half-bridge and full-bridge configurations.

Select drivers with adequate gate drive voltage and current for your power devices.

AutoChips motor driver ICs offer multiple current sensing options for motor control and protection. Integrated current sense amplifiers provide high-side or low-side current measurement with programmable gain. External shunt resistor support allows flexible current range configuration. Some devices include integrated current sensing resistors for compact designs. The current sensing circuits provide real-time feedback for torque control, over-current protection, and diagnostic monitoring.

Select internal sensing for compact designs, external shunt for flexible current ranges.

AutoChips motor driver ICs include comprehensive protection features for reliable automotive operation. Standard protections include over-current protection (OCP) with programmable thresholds, over-temperature protection (OTP) with thermal shutdown, under-voltage lockout (UVLO) for safe startup, and shoot-through prevention with programmable dead-time. Additional features include over-voltage protection, open-load detection, and short-circuit protection. Diagnostic outputs provide fault indication to the system MCU for appropriate fault response.

All AutoChips motor drivers include essential protections. Contact LiTong for specific protection requirements.

AutoChips motor driver ICs support PWM frequencies from 1kHz to 50kHz depending on the specific device and application requirements. Lower frequencies (1-10kHz) are suitable for high-power motors where switching losses are a concern. Higher frequencies (20-50kHz) allow smaller filter components and quieter operation for fans and pumps. The gate drive circuits are optimized for efficient switching across the supported frequency range. Programmable dead-time ensures reliable operation at all PWM frequencies.

Select PWM frequency based on motor type, power level, and EMC requirements.