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A3955SLB-T

更新时间： 2024-11-30 03:16:35
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

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A3955SLB-T 数据手册

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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  
10  
15  
6
16  
PHASE  
V
CC  
7
V
BB  
GROUND  
4
5
UVLO  
& TSD  
12  
13  
BLANKING  
GATE  
CURRENT-SENSE  
COMPARATOR  
SENSE  
MIXED-DECAY  
COMPARATOR  
PWM LATCH  
R
Q
S
11  
+
–
PFD  
1
+
–
÷3  
D/A  
BLANKING  
DISABLE  
R
S
V
CC  
+ –  
RC  
3
V
TH  
2
8
9
14  
C
T
R
T
Dwg. FP-042  
29319.41E  
1234567...13

中文翻译

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A3955SLB-T 替代型号

型号 品牌 替代类型 描述 数据表
A4975SLBTR-T ALLEGRO

完全替代

 Full-Bridge PWM Microstepping Motor Driver
A4975SB-T ALLEGRO

完全替代

 Full-Bridge PWM Microstepping Motor Driver
A3955SB ALLEGRO

完全替代

 FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER

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