N-channel H-bridge brushed DC motor driver
Pin-to-pin, RDS(on), voltage, and current sense/regulation variants (external shunt resistor and integrated current mirror)
DRV8870: 6.5-V to 45-V, 565-mΩ, shunt
DRV8251: 4.5-V to 48-V, 450-mΩ, shunt
DRV8251A: 4.5-V to 48-V, 450-mΩ, mirror
DRV8231: 4.5-V to 33-V, 600-mΩ, shunt
DRV8231A: 4.5-V to 33-V, 600-mΩ, mirror
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.
| Tipo | Título | Fecha | ||
|---|---|---|---|---|
| * | Data sheet | DRV8251A 4.1-A Brushed DC Motor Driver with Integrated Current Sense and Regulation datasheet | PDF | HTML | 21 ago 2020 |
| Certificate | DRV8251AEVM EU RoHS Declaration of Comformity (DoC) | 09 nov 2021 | ||
| Technical article | Using brushed motors to improve battery life and reliability in vacuum robots | PDF | HTML | 17 jul 2019 |
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
El módulo de evaluación DRV8251A (EVM) permite una fácil evaluación del dispositivo DRV8251A. El módulo de evaluación (EVM) se programó y configuró para que funcionara desde el primer momento e hiciera arrancar los motores de inmediato.
El DRV8251A es un controlador de puente en H único con (...)
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
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