Datasheet > A3973SB-T

A3973SB-T

更新时间： 2024-01-10 03:47:15

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
10页	364K
描述
Dual DMOS Full-Bridge Microstepping PWM 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

A3973SB-T 数据手册

A3973

Dual DMOS Full-Bridge Microstepping PWM Motor Driver

Features and Benefits

Description

▪ ±1 A, 35 V Continuous Output Rating

▪ Low R_DS(on)DMOS Output Drivers

▪ Optimized Microstepping via 6-Bit Linear DACs

Designed for pulse-width modulated (PWM) current control

of bipolar microstepping stepper motors, theA3973 is capable

of continuous output currents to ±1 A and operating voltages

▪ Programmable Mixed, Fast, and Slow Current Decay Modes to 35 V. Internal fixed off-time PWM current-control timing

▪ 4 MHz Internal Oscillator for Digital Timing

▪ Serial-Interface Controls Chip Functions

▪ Synchronous Rectification for Low Power Dissipation

▪ Internal UVLO and Thermal Shutdown Circuitry

▪ Crossover-Current Protection

▪ Precision 2 V Reference

▪ Inputs Compatible with 3.3 or 5 V Control Signals

▪ Sleep and Idle Modes

circuitry can be programmed via a serial interface to operate

in slow, fast, and mixed current-decay modes.

The desired load-current level is set via the serial port with

two 6-bit linear DACs in conjunction with a reference voltage.

The six bits of control allow maximum flexibility in torque

control for a variety of step methods, from microstepping to

full-step drive. Load current is set in 1.56% increments of the

maximum value.

Synchronous rectification circuitry allows the load current to

flowthroughthelowR_DS(on)oftheDMOSoutputdriverduring

the current decay. This feature eliminates the need for external

clamp diodes in most applications, saving cost and external

component count, while minimizing power dissipation.

Packages:

Internal circuit protection includes thermal shutdown with

hysteresis,transient-suppressiondiodes,andcrossover-current

protection. Special power-up sequencing is not required.

Package B, 24-pin DIP with

two batwing power tabs

TheBpackageisa24-leadDIPwithtwocopperbatwingpower

tabs. The LB is a 24-lead SOICW with four internally fused

leads for enhanced power dissipation. These power tabs and

pins are at ground potential and need no electrical isolation.

The A3973 B and LB packages are electrically identical.

Package LB, 24 pin SOICW

with 4 fused leads

Not to scale

Pin-out Diagram

VCP

CP1

CP2

OSC

23 SLEEP

REG

OUT 1B

LOAD

21 OUT 2B

LOAD

SUPPLY 2

SUPPLY

BB1

BB2

GROUND

SENSE

OUT 2A

OUT 1A

STROBE

LOGIC

SUPPLY

MUX

REF

CLOCK

DATA

Dwg. PP-069-3

29319.34 Rev. 2

12 3 4 5 6 7...10

下载PDF

与A3973SB-T相关器件

型号	品牌	描述	获取价格	数据表
A3973SLB	ALLEGRO	DUAL DMOS FULL-BRIDGE MICROSTEPPING PWM MOTOR DRIVER	获取价格
A3973SLB-T	ALLEGRO	Dual DMOS Full-Bridge Microstepping PWM Motor Driver	获取价格
A3973SLBTR	ALLEGRO	Stepper Motor Controller, 1A, PDSO24, BATWING, PLASTIC, SOIC-24	获取价格
A3973SLBTR-T	ALLEGRO	暂无描述	获取价格
A3974	ALLEGRO	DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER	获取价格
A3974SED	ALLEGRO	DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER	获取价格