Datasheet > DRV8251A

DRV8251A

更新时间： 2024-01-23 14:34:51

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
46页	4475K
描述
DRV8231A 3.7-A Brushed DC Motor Driver with Integrated Current Sense and Regulation

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DRV8251A 数据手册

DRV8231A

SLVSFZ8 – NOVEMBER 2021

DRV8231A 3.7-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 33-V operating supply voltage range

Pin-to-pin, R_DS(on), voltage, and current sense/

regulation variants (external shunt resistor and

integrated current mirror)

The DRV8231A 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: 3.7-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 V_VM= 24-V, T_J= 25°C

Small package and footprint

– 8-Pin WSON with PowerPAD^™, 2.0 × 2.0 mm

– 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.

•

The DRV8231A is part of a family of devices which

come in pin-to-pin, scalable R_DS(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.

– VM undervoltage lockout (UVLO)

– Auto-retry overcurrent protection (OCP)

– Thermal shutdown (TSD)

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

HSOP (8)

WSON (8)

BODY SIZE (NOM)

4.90 mm × 6.00 mm

2.00 mm × 2.00 mm

DRV8231A

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic

4.5 to 33 V

DRV8231A

IN1

H-Bridge

Motor Driver

IN2

VREF

Current Sense

IPROPI

Protecꢀon

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.

12 3 4 5 6 7...46

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