数据搜索系统，热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

预览 PDF HTML

TDA5345HT 数据表(PDF) 21 Page - NXP Semiconductors

部件名 TDA5345HT
功能描述  5 V spindle & VCM driver combo
PDF  44 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  PHILIPS [NXP Semiconductors]
网页  http://www.nxp.com
标志 PHILIPS - NXP Semiconductors

TDA5345HT 数据表(HTML) 21 Page - NXP Semiconductors

Back Button TDA5345HT Datasheet HTML 17Page - NXP Semiconductors TDA5345HT Datasheet HTML 18Page - NXP Semiconductors TDA5345HT Datasheet HTML 19Page - NXP Semiconductors TDA5345HT Datasheet HTML 20Page - NXP Semiconductors TDA5345HT Datasheet HTML 21Page - NXP Semiconductors TDA5345HT Datasheet HTML 22Page - NXP Semiconductors TDA5345HT Datasheet HTML 23Page - NXP Semiconductors TDA5345HT Datasheet HTML 24Page - NXP Semiconductors TDA5345HT Datasheet HTML 25Page - NXP Semiconductors Next Button
Zoom Inzoom in Zoom Outzoom out
 21 / 44 page
background image
1999 June 10
21
Philips Semiconductors
Preliminary specification
5 V spindle & VCM driver combo
TDA5345HT
(8)
If the VCM current IVCM can be considered as constant, the back-EMF becomes:
(9)
Figure 14 presents the VCM back-EMF amplifier as it is implemented in the TDA5345HT:
The first operational amplifier output voltage (OpAmpOut) is:
(10)
The VCM back-EMF amplifier output voltage (VcmBemf) is:
(11)
(12)
Fig.13 VCM motor model
Act+
VCM
Act-
IVCM
RVCM
LVCM
VCM
back-EMF
IVCM
Act+
Act-
<=>
+
VVCM
e
+
V
VCM
R
VCM
I
VCM
×
(
)
L
VCM
dI
VCM
dt
----------------
×


e
+
+
=
eV
VCM
R
VCM
I
VCM
×
(
)
–
=
Fig.14 VCM back-EMF amplifier
VcmBemf
VcmRef=1.482V
OpAmpOut
OpAmpInM
(ext.)
(ext.)
VcmSenseInM
VcmMinus
VCM
Rsense
(ext.)
(ext.)
R1
R2
2R
R
2R
R
VcmPlus
IVCM
R = 10 k
Ω
(31)
(29)
(18)
(22)
(11)
(6)
(30)
OpAmpOut
VcmSenseInM
R1
R2
--------
R
Sense
I
VCM
×
×


–
=
VcmBemf
2
VcmPlus
OpAmpOut
–
(
)
×
VcmRef
+
=
VcmBemf
2
VcmPlus
VcmSenseInM
R1
R2
--------
R
Sense
I
VCM
×
×
〈
〉
–


–
×
VcmRef
+
=



Html Pages

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 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44


数据表 下载

Go To PDF Page


链接网址



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   |   数据表链接    |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : 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  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com