3.6A Brushed DC Motor Driver with Integrated Current Sensing (PWM Ctrl) - DRV8871

DRV8871 (ACTIVE)

3.6A Brushed DC Motor Driver with Integrated Current Sensing (PWM Ctrl)

 

Description

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.

Features

  • 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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Parametrics Compare all products in Brushed DC Drivers with FETs

 
Vs (Min) (V)
Vs (Max) (V)
RMS Output Current (A)
Peak Output Current (A)
Number of Full Bridges
Control I/F
RDS(ON) (HS + LS) (mOhms)
Number of Half Bridges
Features
Rating
Operating Temperature Range (C)
Pin/Package
DRV8871 DRV8801 DRV8801A-Q1 DRV8870 DRV8872
6.5    8    6.5    6.5    6.5   
45    38    36    45    45   
2    1.8    1.8    2    2   
3.6    2.8    2.8    3.6    3.6   
1    1    1    1    1   
PWM    PH/EN    PH/EN    PWM    PWM   
565    830    830    565    565   
2    2    2    2    2   
Integrated Current Sensing    Current Sense Amplifier    Current Sense Amplifier    Current Regulation    Current Regulation   
Catalog    Catalog    Automotive    Catalog    Catalog   
-40 to 125    -40 to 85    -40 to 125    -40 to 125    -40 to 125   
8SO PowerPAD    16HTSSOP
16QFN   
16WQFN    8SO PowerPAD    8SO PowerPAD   

Other qualified versions of DRV8871

Version Part Number Definition
Automotive DRV8871-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

WEBENCH® Designer DRV8871

  Min   Max Range
Vin  V 6.50 to 45.00V
RMS Current  A ≤ 2A
Ambient Temp  °C -40 to 125°C