数据搜索系统,热门电子元器件搜索
  Chinese▼

Delete All
ON OFF
ALLDATASHEETCN.COM

X  

预览 PDF Download HTML

DRV8871_16 Datasheet(数据表) 14 Page - Texas Instruments

部件型号  DRV8871
说明  Brushed DC Motor Driver With Internal Current Sense (PWM Control)
下载  25 Pages
Scroll/Zoom Zoom In 100% Zoom Out
制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 

DRV8871 Datasheet(HTML) 14 Page - Texas Instruments

Zoom Inzoom in Zoom Outzoom out
 14 page
background image
Local
Bulk Capacitor
Parasitic Wire
Inductance
+
±
Motor
Driver
Power Supply
Motor Drive System
VBB
GND
+
IC Bypass
Capacitor
14
DRV8871
SLVSCY9A – AUGUST 2015 – REVISED JANUARY 2016
www.ti.com
Product Folder Links: DRV8871
Submit Documentation Feedback
Copyright © 2015–2016, Texas Instruments Incorporated
9 Power Supply Recommendations
9.1 Bulk Capacitance
Having appropriate local bulk capacitance is an important factor in motor drive system design. It is generally
beneficial to have more bulk capacitance, while the disadvantages are increased cost and physical size.
The amount of local capacitance needed depends on a variety of factors, including:
The highest current required by the motor system
The power supply’s capacitance and ability to source current
The amount of parasitic inductance between the power supply and motor system
The acceptable voltage ripple
The type of motor used (brushed DC, brushless DC, stepper)
The motor braking method
The inductance between the power supply and motor drive system will limit the rate current can change from the
power supply. If the local bulk capacitance is too small, the system will respond to excessive current demands or
dumps from the motor with a change in voltage. When adequate bulk capacitance is used, the motor voltage
remains stable and high current can be quickly supplied.
The data sheet generally provides a recommended value, but system-level testing is required to determine the
appropriate sized bulk capacitor.
Figure 14. Example Setup of Motor Drive System With External Power Supply
The voltage rating for bulk capacitors should be higher than the operating voltage, to provide margin for cases
when the motor transfers energy to the supply.




HTML 页

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25 


数据表 下载




链接网址


Privacy Policy
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ]  

关于 Alldatasheet    |   广告服务   |   联系我们   |   隐私政策   |   书签   |   链接交换   |   制造商名单
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  , Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp  |   Russian : Alldatasheetru.com
Korean : Alldatasheet.co.kr   |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com  |   Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl