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| 型号： | A3987SLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 1/13页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER MICROSTEPPING 24-TSSOP |
| 产品培训模块： | A3987 DMOS Microstepping |
| 标准包装： | 1 |
| 应用： | 步进电机驱动器 |
| 输出数： | 1 |
| 电流 - 输出： | ±1.5A |
| 电压 - 负载： | 8 V ~ 50 V |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 24-TSSOP 裸露焊盘 |
| 包装： | 标准包装 |
| 产品目录页面： | 1141 (CN2011-ZH PDF) |
| 其它名称： | 620-1171-6 |
A3987
DMOS Microstepping Driver with Translator
Features and Benefits
Description
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Low R DS(on) outputs
Short-to-ground protection
Shorted load protection
Automatic current decay mode detection/selection
Mixed and slow current decay modes
Synchronous rectification for low power dissipation
Internal UVLO and thermal shutdown circuitry
Crossover-current protection
The A3987 is a complete microstepping motor driver with
built-in translator for easy operation. It is designed to operate
bipolar stepper motors in full, half, quarter, and sixteenth step
modes, with output drive capability of 50 V and ? 1.5 A. The
A3987 includes a fixed off-time current regulator, which has
the ability to operate in slow or mixed decay modes.
The translator is the key to the easy implementation of the
A3987. Simply inputting one pulse on the step input drives the
motor to take one microstep. There are no phase sequence tables,
high frequency control lines, or complex interfaces to program.
The A3987 interface is an ideal fit for applications where a
complex microprocessor is unavailable or over-burdened.
The A3987 chopping control automatically selects the current
Package: 24 pin TSSOP with exposed
thermal pad (suffix LP)
Approximate scale
decay mode (slow or mixed). When a STEP signal occurs,
the translator determines if that step results in a higher or
lower current in each of the motor phases. If the change is to
a higher current, then the decay mode is set to slow decay. If
the change is to a lower current, then the decay mode is set to
30.1% fast decay. This current decay control scheme results
in reduced audible motor noise, increased step accuracy, and
reduced power dissipation.
Continued on the next page…
Typical Application Diagram
0.22 μ F
0.1 μ F
X7R
10 μ F
VREG
VDD
CP1
CP2
VCP
0.1 μ F
X7R
5 k Ω
Microcontroller or
Controller Logic
ROSC
A3987
VBB1
VBB2
100 μ F
STEP
DIR
SLEEP/RESET
ENABLE
MS1
MS2
REF
OUT1A
OUT1B
SENSE1
OUT2A
OUT2B
SENSE2
3987DS, Rev. 7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A3987SLPTR-T | 制造商:Allegro MicroSystems 功能描述:IC MOTOR DRIVER DMOS 1.5A TSSOP-24 |
| A3988 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Quad DMOS Full Bridge PWM Motor Driver |
| A3988_11 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:The A3988 is a quad DMOS full-bridge driver capable of driving up to two stepper motors or four DC motors. |
| A3988SEV-T | 制造商:Allegro MicroSystems 功能描述:DMOS Full Bridge PWM Motor Driver 36-Pin QFN EP Tube 制造商:Allegro MicroSystems 功能描述:Motor Driver IC |
| A3988SEVTR-1-T | 功能描述:MOTOR DRIVER 36QFN 制造商:allegro microsystems, llc 系列:- 零件状态:有效 标准包装:1,500 |
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