The DRV8871 device is a brushed-DC motor driver for
printers, appliances, industrial equipment, and other small machines. Two logic inputs control the
H-bridge driver, which consists of four N-channel MOSFETs that can control motors bidirectionally
with up to 3.6-A peak current. The inputs can be pulse-width modulated (PWM) to control motor
speed, using a choice of current-decay modes. Setting both inputs low enters a low-power sleep
The DRV8871 device has advanced current-regulation
circuitry that does not use an analog voltage reference or external sense resistor. This novel
solution uses a standard low-cost, low-power resistor to set the current threshold. The ability to
limit current to a known level can significantly reduce the system power requirements and bulk
capacitance needed to maintain stable voltage, especially for motor startup and stall conditions.
The device is fully protected from faults and short circuits, including undervoltage
(UVLO), overcurrent (OCP), and overtemperature (TSD). When the fault condition is removed, the
device automatically resumes normal operation.
For all available packages, see the orderable addendum at the
end of the data sheet.
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