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ACM6731
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Three-Phase BLDC Motor Driver Chip
Brand: Zhisheng
Input Voltage: 2.7V - 16V
On-resistance (High-side + Low-side): 300mΩ, Peak Phase Current: 2.4A
180° sinusoidal drive for ultra-low noise; square wave drive for high torque.
No external current sense resistor required for sensorless drive mode
Built-in 5V LDO
Applications: Computer cooling fans, household ventilation equipment, industrial fans, automotive water pumps, domestic water pumps, power tools, small home appliances, robot joints
Consult Now Download Sheet
Application Scenarios
智能马桶水泵 智能马桶水泵
智能马桶水泵
汽车水泵电机 汽车水泵电机
汽车水泵电机
洗衣机水泵 洗衣机水泵
洗衣机水泵
空调排水泵 空调排水泵
空调排水泵
GPU散热风扇 GPU散热风扇
GPU散热风扇
CUP散热风扇 CUP散热风扇
CUP散热风扇
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Product Description

ACM6731 Introduction

The ACM6731 is a three-phase brushless DC (BLDC) motor driver chip. It integrates a sensorless three-phase BLDC motor drive algorithm, phase current sensing circuit, gate drive circuit and power MOSFETs internally, supporting a maximum phase current of 2.4A.
Featuring high integration and minimal peripheral components, the ACM6731 is especially suitable for three-phase BLDC motor drive applications that require high power density, compact size and ultra-low noise performance.
The ACM6731 supports 180° sinusoidal drive, which effectively eliminates electromagnetic acoustic interference caused by high-order harmonics. It also supports square-wave drive, ideal for applications requiring fast startup and high torque output.
According to the motor parameters configured by users, the ACM6731 can realize reliable motor startup, acceleration, and constant speed or constant voltage operation. User parameters can be permanently stored via one-time programming.
The ACM6731 provides multiple speed control modes, including external PWM duty cycle speed regulation, external analog voltage speed regulation, and external PWM frequency speed regulation.
Built with multiple protection mechanisms, the ACM6731 can protect both the chip itself and the external motor from abnormal operating conditions.



Device Information：


ACM6731 Applications:

Fan Motor Drivers

  • Computer cooling fans

  • Household ventilation equipment

  • Industrial fans

Pump Motor Drivers

  • Automotive water pumps

  • Domestic water pumps

  • Industrial pumps

Other Constant-Load Applications

  • Power tools

  • Small home appliances

  • Robot joints


Product Features

Input Voltage Range: 2.7V - 16V On-resistance (High-side + Low-side): 300 mΩ, with a peak phase current capability of 2.4 A 180° sinusoidal drive for ultra-low noise; or square-wave drive for high torque. No external current-sense resistor is required in sensorless drive mode. Built-in 5V LDO. FG speed indicator signal (electrical cycle or mechanical cycle, with configurable division ratio). 3 flexible speed control modes via dedicated SPEED pin: external analog voltage speed control, PWM duty cycle speed control, or clock speed control. Protection Features: - Over-current protection - Locked-rotor protection - Over-voltage / Under-voltage protection - Over-temperature protection - Anti-reverse voltage (anti-overshoot) mechanism Quiescent Current (Standby Mode): 100 µA Quiescent Current (Sleep Mode): 10 µA

Application Scenarios
智能马桶水泵
智能马桶水泵
汽车水泵电机
汽车水泵电机
洗衣机水泵
洗衣机水泵
空调排水泵
空调排水泵
GPU散热风扇
GPU散热风扇
CUP散热风扇
CUP散热风扇
Product Tweets