To achieve precise current management, the ACM6262-Q1 integrates a cycle-by-cycle current limiting function. The current threshold is programmable in 16 levels within the range of 0.078A to 2.5A with adjustable step sizes, which effectively limits the motor phase current and prevents damage caused by overcurrent. Integrated current detection and power MOSFETs are embedded inside the chip; the typical on-resistance of high-side and low-side channels in series is only 330 mΩ at 25°C, delivering low conduction loss and improving the energy conversion efficiency of the chip.

In terms of electromagnetic interference optimization, the chip is equipped with ultra-low-frequency EMI optimization options. It adopts multiple EMI suppression methods including PWM edge rate control, spread spectrum technology, and soft switching, which greatly reduce electromagnetic radiation. It meets the EMC certification requirements for automotive electronic equipment and minimizes interference with peripheral automotive electrical components.

The chip features a comprehensive protection system with full-range built-in protection functions, including:Overcurrent protection (threshold at approximately 3.125 A for inter-phase short-circuit scenarios);Locked-rotor detection (entry time selectable as 0.5 / 1 / 1.5 s, release time programmable from 0.2 s to 20.8 s with automatic restart after locked-rotor protection);Undervoltage / Overvoltage lockout protection (UVLO / OVLO with multiple programmable thresholds and hysteresis of 0.2 V and 1 V respectively);Thermal shutdown protection (four adjustable shutdown temperature levels: 110°C / 124°C / 140°C / 157°C with 20°C hysteresis).When any protection mechanism is triggered, the chip enters protection mode promptly and recovers automatically after the fault is cleared, ensuring the safe and stable operation of both the chip and the motor under complex working conditions.

In addition, the ACM6262-Q1 integrates a 5 V LDO regulator with an output voltage accuracy of 4.8 V ~ 5.2 V and an output current capability up to 25 mA. It not only supplies power to the internal circuitry of the chip, but also provides power for the voltage divider circuits of external interfaces such as SPEED and HALL_IN, reducing the use of external power components and simplifying peripheral circuit design. It provides open-drain FG/RD output pins for real-time motor speed feedback to support speed monitoring. Meanwhile, direct pin control is available for motor forward/reverse rotation via the DIR pin and braking via the BRAKE pin, featuring simple control logic for convenient operation of automotive devices.

The peripheral application circuit of the chip is concise, requiring only a small number of passive components such as capacitors and resistors to implement full functions. Pre-programming is supported; if parameters are programmed before factory delivery, resistors for on-board programming can be eliminated to further simplify PCB design. The parameters support more than 500 programming cycles, enabling flexible configuration for different application scenarios to meet customized driving requirements of various automotive single-phase AC/DC brushless motors such as automotive fans and water pumps. It is an optimal choice for automotive motor driving with low power consumption, high reliability and low noise performance.

✅ Automotive Cooling Fans: Engine compartment cooling fans, cabin air conditioning heat dissipation fans — featuring quiet operation and wide temperature adaptability for efficient automotive heat dissipation.✅ Automotive Water Pumps: Engine cooling water pumps, new energy vehicle thermal management circulation water pumps — providing stable driving and locked-rotor protection to ensure uninterrupted water circulation.✅ Automotive Ventilation Systems: Vehicle fresh air fans, seat ventilation fans — supporting low EMI and precise speed regulation to enhance in-vehicle comfort.✅ Automotive Miniature Pumps: Automotive cleaning fluid pumps, fuel auxiliary miniature pumps — compact size with high reliability, suitable for driving various miniature pump components in vehicles.