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| 型号： | A3955SLBTR |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 2/14页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DRIVER PWM FULL 16-SOIC |
| 标准包装： | 1,000 |
| 应用： | 步进电机驱动器 |
| 输出数： | 1 |
| 电流 - 输出： | ±1.5A |
| 电压 - 负载： | 4.5 V ~ 50 V |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 带卷 (TR) |
A3955
Full-Bridge PWM Microstepping Motor Driver
Features and Benefits
? ±1.5 A continuous output current
? 50 V output voltage rating
? 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
Packages:
Description
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
voltages to 50 V. Internal pulse width modulated (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
necessary for microstepping. Microstepping provides increased
step resolution, and reduces torque variations and resonance
problems at low speed.
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 and with the remainder of the
fixed off-time spent in slow current decay. The combination of
Package B, 16-pin DIP
with exposed tabs
Not to scale
Package LB, 16-pin SOIC
with internally fused pins
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.
Continued on the next page…
Functional Block Diagram
PHASE
6
V CC
10
15
16
7
V BB
GROUND
4
5
UVLO
12
13
& TSD
PFD
1
MIXED-DECAY
COMPARATOR
+
–
BLANKING
PWM LATCH
R
Q
S
BLANKING
GATE
CURRENT-SENSE
COMPARATOR
+
–
÷ 3 D/A
SENSE
11
DISABLE
V CC
+ –
RS
RC
3
V TH
2
8
9
14
RT
CT
Dwg. FP-042
29319.41G
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A3955SLBTR/21-60301-01 | 制造商:Allegro MicroSystems 功能描述:FOR JABIL / QUANTUM |
| A3955SLBTR-T | 功能描述:IC MOTOR DRIVER PWM FULL 16-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR |
| A3956SLB | 制造商:Allegro MicroSystems LLC 功能描述:ELECTRONIC COMPONENT |
| A3957SA | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER |
| A3957SLB | 制造商:Allegro MicroSystems LLC 功能描述: |
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