A3955SLB-T

更新时间： 2024-01-16 20:18:56

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器电机
页数	文件大小	规格书
13页	423K
描述
Full-Bridge PWM Microstepping Motor Driver

阅读下载

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

A3955SLB-T 数据手册

A3955

Full-Bridge PWM Microstepping Motor Driver

Features and Benefits

Description

▪ ±1.5 A continuous output current

▪ 50 V output voltage rating

The A3955 is designed to drive one winding of a bipolar

stepper motor in a microstepping mode. The outputs are

rated for continuous output currents to ±1.5 A and operating

voltagesto50V.Internalpulsewidthmodulated(PWM)current

control combined with an internal three-bit nonlinear digital-

to-analog converter allows the motor current to be controlled

in full-, half-, quarter-, or eighth-step (microstepping) modes.

Nonlinear increments minimize the number of control lines

necessaryformicrostepping.Microsteppingprovidesincreased

step resolution, and reduces torque variations and resonance

problems at low speed.

▪ Internal PWM current control

▪ 3-bit nonlinear DAC

▪ Fast, mixed fast/slow, and slow current-decay modes

▪ Internal transient-suppression diodes

▪ Internal thermal shutdown circuitry

▪ Crossover-current and UVLO protection

InternalcircuitrydetermineswhetherthePWMcurrent-control

circuitry operates in a slow (recirculating) current-decay

mode, fast (regenerative) current-decay mode, or in a mixed

current-decay mode in which the off-time is divided into a

period of fast current decay and with the remainder of the

fixed off-time spent in slow current decay. The combination of

user-selectable current-sensing resistor and reference voltage,

digitally selected output current ratio; and slow, fast, or mixed

current-decay modes provides users with a broad, variable

range of motor control.

Packages:

Package B, 16-pin DIP

with exposed tabs

Package LB, 16-pin SOIC

with internally fused pins

Not to scale

Continued on the next page…

Functional Block Diagram

PHASE

GROUND

UVLO

& TSD

BLANKING

GATE

CURRENT-SENSE

COMPARATOR

SENSE

MIXED-DECAY

COMPARATOR

PWM LATCH

–

PFD

–

÷3

D/A

BLANKING

DISABLE

+ –

Dwg. FP-042

29319.41E

12 3 4 5 6 7...13

下载PDF

与A3955SLB-T相关器件

型号	品牌	描述	获取价格	数据表
A3955SLBTR	ALLEGRO	Stepper Motor Controller, 1.5A, BIPolar, PDSO16, PLASTIC, SOIC-16	获取价格
A3955SLBTR-T	ALLEGRO	Full-Bridge PWM Microstepping Motor Driver	获取价格
A3957SA	ALLEGRO	FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER	获取价格
A3957SLB	ALLEGRO	FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER	获取价格
A3957SLBTR	ALLEGRO	Stepper Motor Controller, 1.5A, BIPolar, PDSO22, BATWING, PLASTIC, SOIC-24	获取价格
A3958	ALLEGRO	DMOS FULL-BRIDGE PWM MOTOR DRIVER	获取价格