A4987SESTR-T

更新时间： 2024-02-06 18:06:36

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
16页	441K
描述
DMOS Dual Full-Bridge PWM Motor Driver with Overcurrent Protection

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技术参数
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A4987SESTR-T 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	QFN
包装说明：	HVQCCN, LCC24,.16SQ,20	针数：	24
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	1.61
模拟集成电路 - 其他类型：	STEPPER MOTOR CONTROLLER	JESD-30 代码：	S-XQCC-N24
JESD-609代码：	e3	长度：	4 mm
湿度敏感等级：	2	功能数量：	1
端子数量：	24	最高工作温度：	85 °C
最低工作温度：	-20 °C	最大输出电流：	1 A
封装主体材料：	UNSPECIFIED	封装代码：	HVQCCN
封装等效代码：	LCC24,.16SQ,20	封装形状：	SQUARE
封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	峰值回流温度（摄氏度）：	260
电源：	35 V	认证状态：	Not Qualified
座面最大高度：	0.8 mm	子类别：	Motion Control Electronics
最大供电电流 (Isup)：	4 mA	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	3 V	标称供电电压 (Vsup)：	3.3 V
表面贴装：	YES	技术：	NMOS
温度等级：	OTHER	端子面层：	Matte Tin (Sn)
端子形式：	NO LEAD	端子节距：	0.5 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	40
宽度：	4 mm	Base Number Matches：	1

A4987SESTR-T 数据手册

A4987

DMOS Dual Full-Bridge PWM Motor Driver

with Overcurrent Protection

Features and Benefits

▪ Low R_DS(ON)outputs

Description

The A4987 is a dual DMOS full-bridge stepper motor driver

▪ Internal mixed current decay mode

▪ Synchronous rectification for low power dissipation

▪ Internal UVLO

withparallelinputcommunicationandovercurrentprotection.

Eachfull-bridgeoutputisratedupto35Vand±1A.TheA4987

includesfixedoff-timepulsewidthmodulation(PWM)current

regulators,alongwith2-bitnonlinearDACs(digital-to-analog

converters) that allow stepper motors to be controlled in full,

half, and quarter steps. The PWM current regulator uses the

Allegro^®patented mixed decay mode for reduced audible

motor noise, increased step accuracy, and reduced power

dissipation.

▪ Crossover-current protection

▪ 3.3 and 5 V compatible logic supply

▪ Thin profile QFN and TSSOP packages

▪ Thermal shutdown circuitry

▪ Short-to-ground protection

▪ Shorted load protection

▪ Low current Sleep mode, < 10 μA

Internalsynchronousrectificationcontrolcircuitryisprovided

to improve power dissipation during PWM operation.

The outputs are protected from shorted load and short-to-

groundevents,whichprotectthedriverandassociatedcircuitry

from thermal damage or flare-ups. Other protection features

includethermalshutdownwithhysteresis,undervoltagelockout

(UVLO) and crossover current protection. Special power-up

sequencing is not required.

Packages:

Approximate size

24-contact QFN

with exposed thermal pad

4 mm × 4 mm × 0.75 mm

(ES package)

TheA4987issuppliedintwopackages,a24-contactQFN(ES)

anda24-pinTSSOP(LP).Bothpackageshaveexposedthermal

pads for enhanced thermal performance. The 24-contact ES is

4 mm × 4 mm, with a nominal overall package height of 0.75

mm. The 24-pin LP is a TSSOP with 0.65 pitch and an overall

package height of ≤1.2 mm. Both packages are lead (Pb) free,

with 100% matte tin leadframe plating.

24-pin TSSOP

with exposed thermal pad

(LP Package)

Typical Application Diagram

V_DD

0.1 μF

0.22 μF

VREG ROSC CP1

VDD

CP2 VCP

VBB1

VBB2

0.22 μF

100 μF

Microcontroller or

Controller Logic

OUT1A

SLEEP

IN01

A4987

OUT1B

SENSE1

IN02

PH1

IN11

IN12

PH2

OUT2A

OUT2B

SENSE2

VREF

GND

4987-DS

12 3 4 5 6 7...16

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