DRV8251/A 48 V H-Bridge Motor Drivers

Product Highlights > DRV8251/A 48 V H-Bridge Motor Drivers

            DRV8251/A 48 V H-Bridge Motor Drivers
                    Texas Instruments' N-channel brushed DC drivers offer current regulation, a charge pump, and protection circuitry
    

Image of Texas Instruments' DRV8251/A 48 V H-Bridge Motor Drivers Texas Instruments' DRV8251 and DRV8251A are integrated motor drivers with an N-channel H-bridge, a charge pump, current regulation, protection circuitry, and current sense feedback (DRV8251A). The charge pump improves efficiency by supporting N-channel MOSFET half-bridges and 100% duty-cycle driving.

The DRV8251A has internal current mirror architecture on the IPROPI pin to implement 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 (MCU) to detect motor stalls or changes in the load conditions. The external voltage reference pin (VREF) determines the threshold of current regulation during start-up and stall events without interaction from an MCU.

The DRV8251 implements a current regulation feature by comparing the analog input VREF and the voltage across a current-sense shunt resistor on the ISEN pin. The ability to limit current can significantly reduce large currents during motor startup and stall conditions.

The 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 (UVLO), output overcurrent (OCP), and thermal shutdown (TSD). The DRV8251/A devices come in pin-to-pin, scalable R_DS(ON), and supply voltage options to support various loads and supply rails with minimal design changes.

Features

N-channel H-bridge brushed DC motor driver
Operating supply voltage range: 4.5 V to 48 V
Pin-to-pin, R_DS(ON), voltage, and current sense/regulation variants (external shunt resistor and integrated current mirror)
- DRV8251: 4.5 V to 48 V, 450 mΩ, shunt
- DRV8251A: 4.5 V to 48 V, 450 mΩ, mirror
High output current capability: 4.1 A peak
PWM control interface
Logic inputs: 1.8 V, 3.3 V, and 5 V
Integrated IPROPI current sensing (DRV8251A) for stall detection and current regulation
Low-power sleep mode: <1 µA at V_VM = 24 V, T_J = +25°C
Small package and footprint: 8-pin HSOP with a PowerPAD™, 4.9 mm x 6.0 mm
Integrated protection: VM UVLO, auto-retry OCP, and TSD

Applications

Printers
Vacuum robots
Washers and dryers
Coffee machines
POS printers
Electricity meters

ATMs (automated teller machines)
Ventilators
Surgical equipment
Electronic hospital beds and bed controls
Fitness machines

	Image	Manufacturer Part Number	Description	Available Quantity	View Details
		DRV8251ADDAR	48-V, 3.5-A H BRIDGE MOTOR DRIVE	0	View Details
		DRV8251DDAR	48-V, 3.5-A H BRIDGE MOTOR DRIVE	0	View Details

Evaluation Boards

	Image	Manufacturer Part Number	Description	Utilized IC / Part	Available Quantity	View Details
		DRV8251EVM	EVAL BOARD FOR DRV8251	DRV8251	0	View Details
		DRV8251AEVM	EVAL BOARD FOR DRV8251A	DRV8251A	1 - Immediate	View Details

Published: 2022-03-10

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