A3955SLB

更新时间： 2024-11-29 22:18:51

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器运动控制电子器件信号电路光电二极管电动机控制电机
页数	文件大小	规格书
16页	133K
描述
FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER

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中文翻译

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技术参数
数据手册
替代型号

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A3955SLB 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	SOIC	包装说明：	PLASTIC, SOIC-16
针数：	16	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.43	Is Samacsys：	N
其他特性：	ADDITIONAL 5V TO 50V VBB POWER SUPPLY ALSO REQUIRED	模拟集成电路 - 其他类型：	STEPPER MOTOR CONTROLLER
JESD-30 代码：	R-PDSO-G16	JESD-609代码：	e0
长度：	10.3 mm	功能数量：	1
端子数量：	16	最高工作温度：	85 °C
最低工作温度：	-20 °C	最大输出电流：	1.5 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装等效代码：	SOP16,.4	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	240
电源：	5 V	认证状态：	Not Qualified
座面最大高度：	2.65 mm	子类别：	Motion Control Electronics
最大供电电流 (Isup)：	50 mA	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	4.5 V	标称供电电压 (Vsup)：	5 V
表面贴装：	YES	技术：	BIPOLAR
温度等级：	OTHER	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
宽度：	7.5 mm	Base Number Matches：	1

A3955SLB 数据手册

3955

FULL-BRIDGE PWM

MICROSTEPPING MOTOR DRIVER

The A3955SB and A3955SLB are designed for driving 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 voltages

to 50 V. Internal pulse-width modulated (PWM) current control com-

bined 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 necessary for microstepping.

LOAD

SUPPLY

PFD

REF

OUT

GROUND

13 GROUND

LOGIC

Microstepping provides for increased step resolution, and reduces

torque variations and resonance problems at low speed.

GROUND

SENSE

LOGIC

SUPPLY

Internal circuitry determines whether the PWM current-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 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.

10 OUT

PHASE

Dwg. PP-056-2

Note the A3955SB (DIP) and the A3955SLB

(SOIC) are electrically identical and share a

common terminal number assignment.

Internal circuit protection includes thermal shutdown with hyster-

esis, transient-suppression diodes, and crossover current protection.

Special power-up sequencing is not required.

ABSOLUTE MAXIMUM RATINGS

Load Supply Voltage, V_BB. . . . . . . . . . 50 V

Output Current, I_OUT

(Continuous) . . . . . . . . . . . . . . ±1.5 A*

Logic Supply Voltage, V_CC. . . . . . . . . 7.0 V

The A3955S— is supplied in a choice of two power packages; a

16-pin dual-in-line plastic package with copper heat-sink tabs (suffix

‘B’), and a 16-lead plastic SOIC with copper heat-sink tabs (suffix ‘LB’).

For both package styles, the power tab is at ground potential and

needs no electrical isolation.

Logic/Reference Input Voltage Range,

V_IN. . . . . . . . . . . -0.3 V to V_CC+ 0.3 V

Sense Voltage, V_S. . . . . . . . . . . . . . . . 1.0 V

Package Power Dissipation,

FEATURES

■ ±1.5 A Continuous Output Current

■ 50 V Output Voltage Rating

■ Internal PWM Current Control

■ 3-Bit Non-Linear DAC

■ Fast, Mixed Fast/Slow, and Slow Current-Decay Modes

■ Internal Transient-Suppression Diodes

■ Internal Thermal-Shutdown Circuitry

■ Crossover-Current and UVLO Protection

P_D. . . . . . . . . . . . . . . . . . . . See Graph

Operating Temperature Range,

T_A. . . . . . . . . . . . . . . . . -20˚C to +85˚C

Junction Temperature, T_J. . . . . . . +150˚C†

Storage Temperature Range,

T_S. . . . . . . . . . . . . . . . -55˚C to +150˚C

* Output current rating may be limited by duty

cycle, ambient temperature, and heat sinking.

Under any set of conditions, do not exceed the

specified current rating or a junction temperature

of 150˚C.

† Fault conditions that produce excessive junction

temperature will activate the device’s thermal

shutdown circuitry. These conditions can be

tolerated but should be avoided.

Always order by complete part number:

Part Number

Package

A3955SB

16-Pin DIP

A3955SLB

16-Lead SOIC

12 3 4 5 6 7...16

中文翻译

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A3955SLB 替代型号

型号	品牌	替代类型	描述	数据表
A3955SLBTR	ALLEGRO	完全替代	Stepper Motor Controller, 1.5A, BIPolar, PDSO16, PLASTIC, SOIC-16
A3955SLBTR-T	ALLEGRO	完全替代	Full-Bridge PWM Microstepping Motor Driver
A3955SB	ALLEGRO	完全替代	FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER

与A3955SLB相关器件

型号	品牌	获取价格	描述	数据表
A3955SLB-T	ALLEGRO	获取价格	Full-Bridge PWM Microstepping Motor Driver
A3955SLBTR	ALLEGRO	获取价格	Stepper Motor Controller, 1.5A, BIPolar, PDSO16, PLASTIC, SOIC-16
A3955SLBTR-T	ALLEGRO	获取价格	Full-Bridge PWM Microstepping Motor Driver
A3957SA	ALLEGRO	获取价格	FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER
A3957SLB	ALLEGRO	获取价格	FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER
A3957SLBTR	ALLEGRO	获取价格	Stepper Motor Controller, 1.5A, BIPolar, PDSO22, BATWING, PLASTIC, SOIC-24
A3958	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3958SB	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3958SB-T	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3958SLB	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER

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