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DRV8251ADDAR

更新时间： 2024-11-06 02:51:31
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德州仪器 - TI /
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39页 3370K
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DRV8251A 4.1-A Brushed DC Motor Driver with Integrated Current Sense and Regulation

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DRV8251A  
SLVSFU6 – JANUARY 2022  
DRV8251A 4.1-A Brushed DC Motor Driver with Integrated Current Sense and  
Regulation  
1 Features  
3 Description  
•
•
•
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.  
•
•
•
•
•
•
•
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  
•
•
•
•
•
•
•
•
•
•
•
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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