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参数资料
| 型号： | A4987SESTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 1/17页 |
| 文件大小： | 0K |
| 描述： | IC STEPPER MOTOR DRIVER 24QFN |
| 特色产品： | A498x Motor Driver Family |
| 标准包装： | 1 |
| 应用： | PWM 电机驱动器，步进电机驱动器 |
| 评估套件： | 可供 |
| 输出数： | 1 |
| 电流 - 输出： | ± 1A |
| 电压 - 负载： | 8 V ~ 35 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-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-QFN 裸露焊盘（4x4） |
| 包装： | 标准包装 |
| 其它名称： | 620-1404-6 |
A4987
DMOS Dual Full-Bridge PWM Motor Driver
With Overcurrent Protection
Features and Benefits
Description
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Low R DS(ON) outputs
Internal mixed current decay mode
Synchronous rectification for low power dissipation
Internal UVLO
Crossover-current protection
3.3 and 5 V compatible logic supply
Thin profile QFN and TSSOP packages
Thermal shutdown circuitry
Short-to-ground protection
Shorted load protection
Low current Sleep mode, < 10 μ A
The A4987 is a dual DMOS full-bridge stepper motor driver
with parallel input communication and overcurrent protection.
Each full-bridge output is rated up to 35 V and ±1 A. The A4987
includes fixed off-time pulse width modulation (PWM) current
regulators, along with 2- bit nonlinear DACs (digital-to-analog
converters) that allow stepper motors to be controlled in full,
half, and quarter steps. The PWM current regulator uses the
Allegro ? patented mixed decay mode for reduced audible
motor noise, increased step accuracy, and reduced power
dissipation.
Internal synchronous rectification control circuitry is provided
Packages :
to improve power dissipation during PWM operation.
The outputs are protected from shorted load and short-to-
24-contact QFN
4 mm × 4 mm × 0.75 mm
(ES package)
24-pin TSSOP
with exposed thermal pad
(LP Package)
Approximate size
ground events, which protect the driver and associated circuitry
from thermal damage or flare-ups. Other protection features
include thermal shutdown with hysteresis, undervoltage lockout
(UVLO) and crossover current protection. Special power-up
sequencing is not required.
The A4987 is supplied in two packages, a 24-contact QFN (ES)
and a 24-pin TSSOP (LP). Both packages have exposed thermal
pads for enhanced thermal performance. The 24-contact ES is
4 mm × 4 mm, with a nominal overall package height of 0.75
mm. The 24-pin LP is a TSSOP with 0.65 pitch and an overall
package height of ≤ 1.2 mm. Both packages are lead (Pb) free,
with 100% matte tin leadframe plating.
Typical Application Diagram
V DD
0.22 μ F
0.1 μ F
0.1 μ F
0.22 μ F
VREG ROSC
VDD
CP1
CP2
VCP
VBB1
VBB2
100 μ F
Microcontroller or
Controller Logic
SLEEP
IN01
IN02
A4987
OUT1A
OUT1B
SENSE1
PH1
IN11
IN12
PH2
OUT2A
OUT2B
VREF
GND
GND
SENSE2
4987-DS, Rev. 5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A4987SLPTR | 制造商:Allegro MicroSystems LLC 功能描述:DMOS Dual Full-Bridge PWM Motor Driver |
| A4987SLPTR-T | 功能描述:IC STEPPER MOTOR DRIVER 24TSSOP 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:步进电机驱动器，1-2 相，2 相 评估套件:- 输出数:1 电流 - 输出:800mA 电压 - 负载:10 V ~ 28 V 电源电压:4.75 V ~ 5.25 V 工作温度:-20°C ~ 90°C 安装类型:表面贴装 封装/外壳:28-SOP + 2 翼片裸露焊盘 供应商设备封装:28-HSOPHC（15.2x7.9） 包装:剪切带 (CT) 其它名称:869-1268-1 |
| A4988 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DMOS Microstepping Driver with Translator And Overcurrent Protection |
| A4988_V4 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DMOS Microstepping Driver with Translator And Overcurrent Protection |
| A4988SETTR | 制造商:Allegro MicroSystems LLC 功能描述:DMOS Microstepping Driver |
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