A3989_V

更新时间： 2024-11-24 12:52:23

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
13页	382K
描述
Bipolar Stepper and High Current DC Motor Driver

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

A3989_V 数据手册

A3989

Bipolar Stepper and High Current DC Motor Driver

Features and Benefits

▪ 36 V output rating

Description

The A3989 is designed operate at voltages up to 36 V while driving

one bipolar stepper motor, at currents up to 1.2A, and one DC motor,

at currents up to 2.4 A. The A3989 includes a fixed off-time pulse

width modulation (PWM) regulator for current control. The stepper

motor driver features dual 2-bit nonlinear DACs (digital-to-analog

converters) that enable control in full, half, and quarter steps. The

DC motor is controlled using standard PHASE and ENABLE signals.

Fast or slow current decay is selected via the MODE pin. The PWM

current regulator uses the Allegro^™patented mixed decay mode for

reduced audible motor noise, increased step accuracy, and reduced

power dissipation.

▪ 2.4 A DC motor driver

▪ 1.2 A bipolar stepper driver

▪ Synchronous rectification

▪ Internal undervoltage lockout (UVLO)

▪ Thermal shutdown circuitry

▪ Crossover-current protection

▪ Very thin profile QFN package

Internal synchronous rectification control circuitry is provided to

improve power dissipation during PWM operation.

Package: 36 pin QFN with exposed thermal pad

0.90 mm nominal height (suffix EV)

Protection features include thermal shutdown with hysteresis,

undervoltage lockout (UVLO) and crossover current protection.

Special power up sequencing is not required.

The A3989 is supplied in a leadless 6 mm × 6 mm × 0.9 mm,

36 pin QFN package with exposed power tab for enhanced thermal

performance. The package is lead (Pb) free, with 100% matte tin

leadframe plating.

Approximate scale 1:1

0.1 μF

50 V

100 μF

50 V

0.22 μF

50 V

CP1 CP2 VCP VBB VBB

VDD

OUT1A

OUT1B

SENSE1

PHASE1

I01

A3989

I11

OUT2A

Microcontroller or

Controller Logic

PHASE2

I02

OUT2B

SENSE2

I12

PHASE3

ENABLE

MODE

VREF1

VREF2

VREF3

OUT3A

OUT3B

SENSE3

GND GND

Figure 1. Typical application circuit

A3989DS, Rev. 3

12 3 4 5 6 7...13

中文翻译

下载PDF

与A3989_V相关器件

型号	品牌	获取价格	描述	数据表
A3989SEV-T	ALLEGRO	获取价格	Bipolar Stepper and High Current DC Motor Driver
A3989SEVTR-T	ALLEGRO	获取价格	Bipolar Stepper and High Current DC Motor Driver
A398C	POWEREX	获取价格	Rectifier Diode, 1 Element, 400A, 300V V(RRM)
A398E	POWEREX	获取价格	Rectifier Diode, 1 Element, 400A, 500V V(RRM)
A-398E	ETC	获取价格	ALPHA-NUMERIC DISPLAY
A-398G	ETC	获取价格	ALPHA-NUMERIC DISPLAY
A-398H	PARALIGHT	获取价格	LED Display
A398M	POWEREX	获取价格	Rectifier Diode, 1 Element, 400A, 600V V(RRM)
A398PA	POWEREX	获取价格	Rectifier Diode, 1 Element, 400A, 1100V V(RRM)
A398PB	POWEREX	获取价格	Rectifier Diode, 1 Element, 400A, 1200V V(RRM)