DRV8251A
SLVSFU6 – JANUARY 2022
DRV8251A 4.1-A Brushed DC Motor Driver with Integrated Current Sense and
Regulation
1 Features
3 Description
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N-channel H-bridge brushed DC motor driver
4.5-V to 48-V operating supply voltage range
Pin-to-pin, RDS(on), voltage, and current sense/
regulation variants (external shunt resistor and
integrated current 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.
– 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
High output current capability: 4.1-A Peak
PWM control interface
Supports 1.8-V, 3.3-V, and 5-V logic inputs
Integrated IPROPI current sensing for stall
detection and current regulation
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.
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Low-power sleep mode
– <1-µA at VVM = 24-V, TJ = 25°C
Small package and footprint
– 8-Pin HSOP with PowerPAD™, 4.9 × 6.0 mm
Integrated protection features
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.
– VM undervoltage lockout (UVLO)
– Auto-retry overcurrent protection (OCP)
– Thermal shutdown (TSD)
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.
2 Applications
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Printers
Vacuum robot
Washer and dryer
Coffee machine
POS printer
Electricity meter
ATMs (Automated Teller Machines)
Ventilators
Surgical equipment
Electronic hospital bed and bed control
Fitness machine
Device Information (1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV8251ADDA
HSOP (8)
4.90 mm × 6.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4.5 to 48 V
DRV8251A
IN1
H-Bridge
Motor Driver
IN2
VREF
Current Sense
IPROPI
Protecꢀon
Simplified Schematic
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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