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A3955SLB-T Datasheet

  • A3955SLB-T

  • Full-Bridge PWM Microstepping Motor Driver

  • 13頁

  • ALLEGRO   ALLEGRO

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A3955
Full-Bridge PWM Microstepping Motor Driver
Features and Benefits
鈻?/div>
鹵1.5 A continuous output current
鈻?/div>
50 V output voltage rating
鈻?/div>
Internal PWM current control
鈻?/div>
3-bit nonlinear DAC
鈻?/div>
Fast, mixed fast/slow, and slow current-decay modes
鈻?/div>
Internal transient-suppression diodes
鈻?/div>
Internal thermal shutdown circuitry
鈻?/div>
Crossover-current and UVLO protection
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 鹵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
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鈥?/div>
Packages:
Package B, 16-pin DIP
with exposed tabs
Not to scale
Package LB, 16-pin SOIC
with internally fused pins
Functional Block Diagram
LOGIC
SUPPLY
LOAD
SUPPLY
OUTA
OUTB
PHASE
7
6
V
CC
10
15
16
V
BB
GROUND
4
5
12
13
UVLO
& TSD
MIXED-DECAY
COMPARATOR
PWM LATCH
BLANKING
GATE
CURRENT-SENSE
COMPARATOR
SENSE
11
PFD
1
+
鈥?/div>
BLANKING
R
Q
S
+ 鈥?/div>
RC
3
V TH
2
REF
+
鈥?/div>
梅3
D/A
DISABLE
V
CC
RS
8
D
2
9
D
1
14
D
0
RT
CT
Dwg. FP-042
29319.41E

A3955SLB-T 產(chǎn)品屬性

  • 47

  • 集成電路 (IC)

  • PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器

  • -

  • 步進(jìn)電機(jī)驅(qū)動(dòng)器

  • -

  • 1

  • ±1.5A

  • 4.5 V ~ 50 V

  • 4.5 V ~ 5.5 V

  • -20°C ~ 85°C

  • 表面貼裝

  • 16-SOIC（0.295"，7.50mm 寬）

  • 16-SOIC W

  • 管件

  • 620-1068

A3955SLB-T相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
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  • 英文版
    DMOS Full-Bridge Motor Driver
    ALLEGRO
  • 英文版
    DMOS Full-Bridge Motor Driver
    ALLEGRO [A...
  • 英文版
    FULL-BRIDGE PWM MOTOR DRIVER
    ALLEGRO
  • 英文版
    FULL-BRIDGE PWM MOTOR DRIVER
    ALLEGRO [A...
  • 英文版
    Full-Bridge PWM Motor Driver(全橋脈寬調(diào)制電流控制電機(jī)驅(qū)動(dòng)器...
    Allegro MicroSy...
  • 英文版
    FULL-BRIDGE PWM MOTOR DRIVER
    ALLEGRO
  • 英文版
    FULL-BRIDGE PWM MOTOR DRIVER
    ALLEGRO [A...
  • 英文版
    FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER
    ALLEGRO
  • 英文版
    FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER
    ALLEGRO [A...
  • 英文版
    DMOS FULL-BRIDGE PWM MOTOR DRIVER
    ALLEGRO
  • 英文版
    DMOS FULL-BRIDGE PWM MOTOR DRIVER
    ALLEGRO [A...
  • 英文版
    DMOS FULL-BRIDGE PWM MOTOR DRIVER
    ALLEGRO
  • 英文版
    DMOS FULL-BRIDGE PWM MOTOR DRIVER
    ALLEGRO [A...
  • 英文版
    FULL-BRIDGE PWM MOTOR DRIVER
    ETC
  • 英文版
    FULL-BRIDGE PWM MOTOR DRIVER
    ETC
  • 英文版
    FULL-BRIDGE PWM MOTOR DRIVER
    ALLEGRO
  • 英文版
    FULL-BRIDGE PWM MOTOR DRIVER
    ALLEGRO [A...
  • 英文版
    FULL-BRIDGE PWM MOTOR DRIVER
    ALLEGRO
  • 英文版
    FULL-BRIDGE PWM MOTOR DRIVER
    ALLEGRO [A...
  • 英文版
    Industrial Control IC
    ETC

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