The DRV8251A device is an integrated motor driver with N-channel H-bridge,
charge pump, current sense
feedback, current regulation, and protection circuitry. The charge pump
improves efficiency by supporting N-channel MOSFET half bridges and 100% duty cycle
driving.
An internal current mirror
architecture on the IPROPI pin implements current sensing and regulation. This
eliminates the need for a large power shunt resistor, saving board area and reducing
system cost. The IPROPI current-sense output allows a microcontroller to detect
motor stall or changes in load conditions. The external voltage reference pin, VREF,
determines the threshold of current regulation during start-up and stall events
without interaction from a microcontroller.
A low-power sleep mode achieves
ultra-low quiescent current draw by shutting down most of the internal circuitry.
Internal protection features include supply undervoltage lockout, output
overcurrent, and device overtemperature.
The DRV8251A is part of a family of devices which come in pin-to-pin, scalable
RDS(on) and supply voltage options to support various loads and
supply rails with minimal design changes. See Section 5 for information on the devices in this family. View the full portfolio of brushed motor drivers on ti.com.
The DRV8251A device is an integrated motor driver with N-channel H-bridge,
charge pump, current sense
feedback, current regulation, and protection circuitry. The charge pump
improves efficiency by supporting N-channel MOSFET half bridges and 100% duty cycle
driving.
An internal current mirror
architecture on the IPROPI pin implements current sensing and regulation. This
eliminates the need for a large power shunt resistor, saving board area and reducing
system cost. The IPROPI current-sense output allows a microcontroller to detect
motor stall or changes in load conditions. The external voltage reference pin, VREF,
determines the threshold of current regulation during start-up and stall events
without interaction from a microcontroller.
A low-power sleep mode achieves
ultra-low quiescent current draw by shutting down most of the internal circuitry.
Internal protection features include supply undervoltage lockout, output
overcurrent, and device overtemperature.
The DRV8251A is part of a family of devices which come in pin-to-pin, scalable
RDS(on) and supply voltage options to support various loads and
supply rails with minimal design changes. See Section 5 for information on the devices in this family. View the full portfolio of brushed motor drivers on ti.com.