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A4988 PDF预览

A4988

更新时间: 2024-02-08 22:37:23
品牌 Logo 应用领域
急速微 - ALLEGRO 驱动器转换器
页数 文件大小 规格书
19页 369K
描述
DMOS Microstepping Driver with Translator and Overcurrent Protection

A4988 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:QFN
包装说明:HVQCCN, LCC28,.2SQ,20针数:28
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:1.63
Samacsys Confidence:3Samacsys Status:Released
2D Presentation:https://componentsearchengine.com/2D/0T/357268.3.1.pngSchematic Symbol:https://componentsearchengine.com/symbol.php?partID=357268
PCB Footprint:https://componentsearchengine.com/footprint.php?partID=3572683D View:https://componentsearchengine.com/viewer/3D.php?partID=357268
Samacsys PartID:357268Samacsys Image:https://componentsearchengine.com/Images/9/A4988SETTR-T.jpg
Samacsys Thumbnail Image:https://componentsearchengine.com/Thumbnails/3/A4988SETTR-T.jpgSamacsys Pin Count:29
Samacsys Part Category:Integrated CircuitSamacsys Package Category:Quad Flat No-Lead
Samacsys Footprint Name:ET Package, 28-Pin QFN with Exposed Thermal PadSamacsys Released Date:2017-01-10 14:38:01
Is Samacsys:N模拟集成电路 - 其他类型:STEPPER MOTOR CONTROLLER
JESD-30 代码:S-XQCC-N28JESD-609代码:e3
长度:5 mm湿度敏感等级:2
功能数量:1端子数量:28
最高工作温度:85 °C最低工作温度:-20 °C
最大输出电流:2 A封装主体材料:UNSPECIFIED
封装代码:HVQCCN封装等效代码:LCC28,.2SQ,20
封装形状:SQUARE封装形式:CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度(摄氏度):260电源:35 V
认证状态:Not Qualified座面最大高度:1 mm
子类别:Motion Control Electronics最大供电电流 (Isup):8 mA
最大供电电压 (Vsup):5.5 V最小供电电压 (Vsup):3 V
标称供电电压 (Vsup):3.3 V表面贴装:YES
技术:DMOS温度等级:OTHER
端子面层:Matte Tin (Sn)端子形式:NO LEAD
端子节距:0.5 mm端子位置:QUAD
处于峰值回流温度下的最长时间:40宽度:5 mm
Base Number Matches:1

A4988 数据手册

 浏览型号A4988的Datasheet PDF文件第2页浏览型号A4988的Datasheet PDF文件第3页浏览型号A4988的Datasheet PDF文件第4页浏览型号A4988的Datasheet PDF文件第5页浏览型号A4988的Datasheet PDF文件第6页浏览型号A4988的Datasheet PDF文件第7页 
A4988  
DMOS Microstepping Driver with Translator  
and Overcurrent Protection  
Features and Benefits  
Low RDS(ON) outputs  
Description  
The A4988 is a complete microstepping motor driver with  
Automatic current decay mode detection/selection  
Mixed and Slow current decay modes  
Synchronous rectification for low power dissipation  
Internal UVLO  
Crossover-current protection  
3.3 and 5 V compatible logic supply  
Thermal shutdown circuitry  
built-in translator for easy operation. It is designed to operate  
bipolar stepper motors in full-, half-, quarter-, eighth-, and  
sixteenth-step modes, with an output drive capacity of up to  
35 V and ±2 A. The A4988 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  
A4988. Simply inputting one pulse on the STEP input drives  
the motor one microstep. There are no phase sequence tables,  
highfrequencycontrollines,orcomplexinterfacestoprogram.  
The A4988 interface is an ideal fit for applications where a  
complex microprocessor is unavailable or is overburdened.  
Short-to-ground protection  
Shorted load protection  
Five selectable step modes: full, 1/2, 1/4, 1/8, and 1/16  
Package:  
During stepping operation, the chopping control in theA4988  
automatically selects the current decay mode, Slow or Mixed.  
In Mixed decay mode, the device is set initially to a fast decay  
for a proportion of the fixed off-time, then to a slow decay for  
the remainder of the off-time. Mixed decay current control  
resultsinreducedaudiblemotornoise,increasedstepaccuracy,  
and reduced power dissipation.  
28-contact QFN  
with exposed thermal pad  
5 mm × 5 mm × 0.90 mm  
(ET package)  
Approximate size  
Continued on the next page…  
Typical Application Diagram  
VDD  
0.1 μF  
0.1 μF  
0.22 μF  
VREG ROSC CP1  
VDD  
CP2 VCP  
VBB1  
VBB2  
0.22 μF  
100 μF  
5 kΩ  
Microcontroller or  
Controller Logic  
SLEEP  
STEP  
OUT1A  
A4988  
OUT1B  
SENSE1  
MS1  
MS2  
MS3  
OUT2A  
DIR  
OUT2B  
ENABLE  
RESET  
SENSE2  
GND  
GND  
VREF  
4988-DS  

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