DRV8870DDAR

The DRV8870 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. By 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 a low level, the motor driver will enter a low-power sleep mode.

The DRV8870 has an integrated current regulation function, which is based on the analog input VREF and the voltage at the ISEN pin (proportional to the motor current flowing through the external sense resistor). 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 resolved, the device will automatically resume normal operation.