AT8870

This DC brushed motor driver is designed for printers, appliances, industrial equipment, and other small machines. Two logic inputs control an H-bridge driver composed of four N-MOSFETs, enabling bidirectional motor control with peak currents up to 3.6A. Using current decay modes, motor speed can be controlled by applying PWM to the inputs. When both inputs are set low, the motor driver enters a low-power sleep mode. It integrates a current limiting function based on the analog input VREF and the voltage at the ISEN pin. The device can limit current to a known level, significantly reducing system power requirements and eliminating the need for large bulk capacitors to maintain stable voltage, especially during motor startup and stall conditions. Internal shutdown features include overcurrent protection, short-circuit protection, undervoltage lockout, and overtemperature protection. The product is offered in an ESOP8 package with an exposed pad for improved thermal dissipation, and is halogen-free, compliant with environmental standards.

Applications

• Printers and office automation equipment
• Electrical appliances
• Robotics
• Industrial equipment

Key features

• Single-channel H-bridge motor driver
• Wide supply voltage range: 6.5V–28V
• Low R_DS(ON): 350mΩ (HS+LS)
• 3.6A peak output current, 2.2A continuous output current
• PWM control interface
• Low-power sleep mode support
• Over-temperature shutdown
• Short-circuit protection
• Under-voltage lockout (UVLO)
• Automatic fault recovery