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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fdrv8251a”>View Datasheet
Texas Instruments DRV8251A H-Bridge Driver is highly integrated with an N-channel H-bridge, charge pump, current sense feedback, current regulation, and protection circuitry. The charge pump improves efficiency by implementing N-channel MOSFET half-bridges and 100% duty cycle driving.
The TI DRV8251A H-Bridge Driver utilizes an internal current mirror architecture on the IPROPI pin to provide current sensing and regulation. This architecture 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 current regulation threshold 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.
With minimal design changes, the DRV8251A Driver offers pin-to-pin, scalable RDS(on), and supply voltage options to support various loads and supply rails.
