DRV8871DDAR

The DRV8871 device is a brushed DC motor driver suitable for printers, appliances, industrial equipment, and other small machines. Two logic inputs control the H-bridge driver, which consists of four N-channel metal-oxide-semiconductor field-effect transistors (MOSFETs) and can control the motor bidirectionally with a peak current of up to 3.6A. Using the current decay mode, the motor speed can be controlled by pulse-width modulation (PWM) of the inputs. If both inputs are set to low, the motor driver will enter a low-power sleep mode. The DRV8871 device features an advanced current regulation circuit that does not use an analog voltage reference or an external sense resistor. This new solution uses a standard low-cost, low-power resistor to set the current threshold. The device can limit the current to a known level, which can significantly reduce the system power consumption requirements and eliminate the need for large-capacity capacitors to maintain a stable voltage, especially during motor startup and shutdown. The device provides comprehensive protection against faults and short circuits, including under-voltage lockout (UVLO), over-current protection (OCP), and thermal shutdown (TSD). After the fault is cleared, the device will automatically resume normal operation.

Applications

• Printers
• Appliances
• Industrial equipment
• Other electromechanical applications

Key features

• H-bridge motor driver for one DC motor, one stepper motor winding, or other loads
• 6.5V to 45V wide operating voltage range
• 565mΩ (typical) RDS(on) (HS + LS)
• 3.6A peak current drive capability
• PWM control interface with current regulation requiring no sense resistor
• Low-power sleep mode
• Compact package – 8-pin HSOP with PowerPAD 4.9mm×6mm
• Integrated protection features – VM undervoltage lockout (UVLO), overcurrent protection (OCP), thermal shutdown (TSD), automatic fault recovery