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A3957SLB

更新时间： 2024-11-29 22:23:19
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 151K
描述
FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER

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中文翻译

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A3957SLB 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：SOP, SOP24,.4
针数：24Reach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.82Is Samacsys：N
模拟集成电路 - 其他类型：STEPPER MOTOR CONTROLLERJESD-30 代码：R-PDSO-G22
JESD-609代码：e0长度：15.4 mm
功能数量：1端子数量：22
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：SOP24,.4
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：NOT SPECIFIED电源：5,5/50 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：NOT SPECIFIED宽度：7.5 mm
Base Number Matches：1

A3957SLB 数据手册

 浏览型号A3957SLB的Datasheet PDF文件第2页浏览型号A3957SLB的Datasheet PDF文件第3页浏览型号A3957SLB的Datasheet PDF文件第4页浏览型号A3957SLB的Datasheet PDF文件第5页浏览型号A3957SLB的Datasheet PDF文件第6页浏览型号A3957SLB的Datasheet PDF文件第7页 
3957  
FULL-BRIDGE PWM  
MICROSTEPPING MOTOR DRIVER  
The A3957SA and A3957SLB 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 combined with an internal  
four-bit nonlinear digital-to-analog converter allows the motor current to be  
controlled in full-, half-, quarter-, eighth-, or sixteenth-step (microstepping)  
modes. Nonlinear increments minimize the number of control lines necessary  
for microstepping. Microstepping provides for increased step resolution, and  
reduces torque variations and resonance problems at low speed.  
A3957SLB  
NO  
CONNECT  
NO  
CONNECT  
1
2
3
4
NC  
NC 24  
V
BB  
LOAD  
SUPPLY  
23  
22  
PFD  
REF  
OUT  
B
NO  
CONNECT  
NO  
CONNECT  
NC  
NC 21  
RC  
GROUND  
GROUND  
5
6
20  
D
0
19 GROUND  
18 GROUND  
LOGIC  
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.  
7
8
9
17  
NC 16  
15  
SENSE  
D
3
NO  
CONNECT  
LOGIC  
SUPPLY  
V
CC  
PHASE 10  
OUT  
A
NO  
CONNECT  
11  
12  
D
NC  
14  
13  
2
NO  
CONNECT  
NC  
D
1
Internal circuit protection includes thermal shutdown with hysteresis,  
transient-suppression diodes, and crossover current protection. Special  
power-up sequencing is not required.  
Dwg. PP-056-4  
ABSOLUTE MAXIMUM RATINGS  
Load Supply Voltage, VBB . . . . . . . . . 50 V  
Output Current, IOUT  
The A3957S— is supplied in a choice of two power packages; a 16-pin  
dual-in-line plastic package (suffix ‘A’), and a 24-lead plastic SOIC with  
copper heat-sink tabs (suffix ‘LB’). The power tab is at ground potential and  
needs no electrical isolation.  
(Continuous) . . . . . . . . . . . . . ±1.5 A*  
Logic Supply Voltage, VCC . . . . . . . 7.0 V  
Logic/Reference Input Voltage Range,  
VIN . . . . . . . . . . -0.3 V to VCC + 0.3 V  
Sense Voltage, VS . . . . . . . . . . . . . . . 1.0 V  
Package Power Dissipation (TA = 25°C), PD  
A3957SA . . . . . . . . . . . . . . . . 2.08 W†  
A3957SLB. . . . . . . . . . . . . . . 2.23 W†  
Operating Temperature Range,  
FEATURES  
■ ±1.5 A Continuous Output Current  
■ 50 V Output Voltage Rating  
■ Internal PWM Current Control  
■ 4-Bit Non-Linear DAC for 16-Bit Microstepping  
■ Satlington™ Sink Drivers  
TA . . . . . . . . . . . . . . . -20˚C to +85˚C  
Junction Temperature, TJ . . . . . . . . +150˚C  
Storage Temperature Range,  
■ Fast, Mixed Fast/Slow, and Slow Current-Decay Modes  
■ Internal Transient-Suppression Diodes  
■ Internal Thermal-Shutdown Circuitry  
■ Crossover-Current and UVLO Protection  
TS . . . . . . . . . . . . . . . -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.  
Always order by complete part number:  
† Per SEMI G42-88 Specification, Thermal Test  
Board Standardization for Measuring Junction-  
to-Ambient Thermal Resistance of Semiconductor  
Packages..  
Part Number  
A3957SA  
Package  
RθJA  
RθJC  
38°C/W  
—
RθJT  
—
16-pin DIP  
60°C/W  
56°C/W  
A3957SLB  
24-lead batwing SOIC  
6°C/W  
1234567...16

中文翻译

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