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A4975SB-T PDF预览

A4975SB-T

更新时间: 2024-02-18 01:55:06
品牌 Logo 应用领域
急速微 - ALLEGRO 驱动器电机
页数 文件大小 规格书
13页 314K
描述
Full-Bridge PWM Microstepping Motor Driver

A4975SB-T 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:SOIC
包装说明:SOP, SOP16,.4针数:16
Reach Compliance Code:compliantHTS代码:8542.39.00.01
风险等级:1.14Samacsys Confidence:4
Samacsys Status:Released2D Presentation:https://componentsearchengine.com/2D/0T/338047.1.1.png
Schematic Symbol:https://componentsearchengine.com/symbol.php?partID=338047PCB Footprint:https://componentsearchengine.com/footprint.php?partID=338047
3D View:https://componentsearchengine.com/viewer/3D.php?partID=338047Samacsys PartID:338047
Samacsys Image:https://componentsearchengine.com/Images/9/A4975SLBTR-T.jpgSamacsys Thumbnail Image:https://componentsearchengine.com/Thumbnails/1/A4975SLBTR-T.jpg
Samacsys Pin Count:16Samacsys Part Category:Integrated Circuit
Samacsys Package Category:Small Outline PackagesSamacsys Footprint Name:16 SOICW
Samacsys Released Date:2016-09-07 08:58:06Is Samacsys:N
其他特性:ALSO REQUIRE 5V TO 50V模拟集成电路 - 其他类型:STEPPER MOTOR CONTROLLER
JESD-30 代码:R-PDSO-G16JESD-609代码:e3
长度:10.3 mm湿度敏感等级:3
功能数量:1端子数量:16
最高工作温度:85 °C最低工作温度:-20 °C
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装等效代码:SOP16,.4封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):260
电源:5 V认证状态:Not Qualified
座面最大高度:2.65 mm子类别:Motion Control Electronics
最大供电电压 (Vsup):5.5 V最小供电电压 (Vsup):4.5 V
标称供电电压 (Vsup):5 V表面贴装:YES
温度等级:OTHER端子面层:Matte Tin (Sn)
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL处于峰值回流温度下的最长时间:40
宽度:7.5 mmBase Number Matches:1

A4975SB-T 数据手册

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A4975  
Full-Bridge PWM Microstepping Motor Driver  
false trips of the comparator under normal operating conditions.  
For optimal regulation of the load current, this value for CT is  
recommended and the value of RT can be sized to determine tOFF  
Stepper Motor Applications. The A4975 is used to  
optimize performance in microstepping/sinusoidal stepper-motor  
drive applications (see gures 4 and 5). When the load current  
is increasing, the slow current-decay mode is used to limit the  
switching losses in the driver and iron losses in the motor. This  
also improves the maximum rate at which the load current can  
increase (as compared to fast decay) due to the slow rate of  
decay during tOFF. When the load current is decreasing, the mixed  
current-decay mode is used to regulate the load current to the  
desired level. This prevents tailing of the current prole caused  
by the back-EMF voltage of the stepper motor (see gure 3A).  
.
Thermal Considerations. Thermal-protection circuitry  
turns off all output transistors when the junction temperature  
reaches approximately +165°C. This is intended only to protect  
the device from failures due to excessive junction temperatures  
and should not imply that output short circuits are permitted. The  
output transistors are re-enabled when the junction temperature  
cools to approximately +150°C.  
V
BB  
BRIDGE A  
BRIDGE B  
D
V
1B  
PFD  
REF  
16  
D
2B  
1
2
3
8
7
9
47 MF  
V
PHASE  
+5 V  
15  
14  
10  
B
D
0A  
6
11  
12  
13  
4
5
13  
12  
11
10  
9
5
4
LOGIC  
LOGIC  
6
7
8
D
0B  
+5 V  
14  
15  
3
2
1
V
PHASE  
REF  
A
47 MF  
V
V
D
D
16  
BB  
PFD  
2A  
1A  
Dwg. EP-047-3  
Figure 4 — Typical Application  
MIXED DECAY  
SLOW DECAY  
MIXED DECAY  
SLOW DECAY  
Dwg. WK-004-3  
Figure 5 — Microstepping/Sinusoidal Drive Current  
Allegro MicroSystems, Inc.  
115 Northeast Cutoff  
9
Worcester, Massachusetts 01615-0036 U.S.A.  
1.508.853.5000; www.allegromicro.com  

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