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 mode.
●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.
● H-Bridge Motor Driver
● Drives One DC Motor, One Winding of a Stepper Motor, or Other Loads
● Wide 6.5-V to 45-V Operating Voltage
● 565-mΩ Typical RDS(on) (HS + LS)
● 3.6-A Peak Current Drive
● PWM Control Interface
● Current Regulation Without a Sense Resistor
● Low-Power Sleep Mode
● Small Package and Footprint
● 8-Pin HSOP With PowerPAD
● 4.9 × 6 mm
●Integrated Protection Features
● VM Undervoltage Lockout (UVLO)
● Overcurrent Protection (OCP)
● Thermal Shutdown (TSD)
● Automatic Fault Recovery
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