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

X  

CS5323GDWR20 数据表(PDF) 10 Page - ON Semiconductor

部件名 CS5323GDWR20
功能描述  Three?뭁hase Buck Controller with 5?묪it DAC
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  ONSEMI [ON Semiconductor]
网页  http://www.onsemi.com
标志 ONSEMI - ON Semiconductor

CS5323GDWR20 数据表(HTML) 10 Page - ON Semiconductor

Back Button CS5323GDWR20 Datasheet HTML 6Page - ON Semiconductor CS5323GDWR20 Datasheet HTML 7Page - ON Semiconductor CS5323GDWR20 Datasheet HTML 8Page - ON Semiconductor CS5323GDWR20 Datasheet HTML 9Page - ON Semiconductor CS5323GDWR20 Datasheet HTML 10Page - ON Semiconductor CS5323GDWR20 Datasheet HTML 11Page - ON Semiconductor CS5323GDWR20 Datasheet HTML 12Page - ON Semiconductor CS5323GDWR20 Datasheet HTML 13Page - ON Semiconductor CS5323GDWR20 Datasheet HTML 14Page - ON Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 16 page
background image
CS5323
http://onsemi.com
10
SWNODE
VFB (VOUT)
CSA Out
CSA Out + VFB
Figure 6. Open Loop Operation
COMP − Offset
T1
T2
Inductive Current Sensing
For lossless sensing current can be sensed across the
inductor as shown below in Figure 7. In the diagram, L is the
output inductance and RL is the inherent inductor resistance.
To compensate the current sense signal the values of R1 and
C1 are chosen so that L/RL = R1 × C1. If this criteria is met
the current sense signal will be the same shape as the
inductor current, the voltage signal at Cx will represent the
instantaneous value of inductor current and the circuit can be
analyzed as if a sense resistor of value RL was used as a sense
resistor (RS).
SWNODE
VOUT
DACOUT
COMP
VFB
CSREF
CSX
CSA
OFFSET
PWM-
COMP
E.A.
R1
C1
L
RL
+
+
+
+
+
+
Figure 7. Lossless Inductive Current Sensing with
Enhanced V2
When choosing or designing inductors for use with
inductive sensing, tolerances and temperature effects should
be considered. Cores with a low permeability material or a
large gap will usually have minimal inductance change with
temperature and load. Copper magnet wire has a
temperature coefficient of 0.39% per °C. The increase in
winding resistance at higher temperatures should be
considered when setting the ILIM threshold. If a more
accurate current sense is required than inductive sensing can
provide, current can be sensed through a resistor as shown
in Figure 5.
Current Sharing Accuracy
PCB traces that carry inductor current can be used as part
of the current sense resistance depending on where the
current sense signal is picked off. For accurate current
sharing, the current sense inputs should sense the current at
the same point for each phase and the connection to the
CSREF should be made so that no phase is favored. (In some
cases, especially with inductive sensing, resistance of the
pcb can be useful for increasing the current sense
resistance.) The total current sense resistance used for
calculations must include any pcb trace between the CS
inputs and the CSREF input that carries inductor current.
Current Sense Amplifier Input Mismatch and the value of
the current sense element will determine the accuracy of
current sharing between phases. The worst case Current
Sense Amplifier Input Mismatch is 5 mV and will typically
be within 3 mV. The difference in peak currents between
phases will be the CSA Input Mismatch divided by the
current sense resistance. If all current sense elements are of
equal resistance a 3 mV mismatch with a 2 mΩ sense
resistance will produce a 1.5 A difference in current between
phases.
Operation at > 50% Duty Cycle
For operation at duty cycles above 50% Enhanced V2
will exhibit subharmonic oscillation unless a compensation
ramp is added to each phase. A circuit like the one on the left
side of Figure 8 can be added to each current sense network
to implement slope compensation. The value of R1 can be
varied to adjust the ramp size.
Switch Node
CSX
CSREF
25 k
R1
.01 μF
1.0 nF
0.1 μF
3 k
GATE(L)X
Slope Comp
Circuit
Existing Current
Sense Circuit
MMBT2222LT1
Figure 8. External Slope Compensation Circuit


类似零件编号 - CS5323GDWR20

制造商部件名数据表功能描述
logo
ON Semiconductor
CS5323GDWR20 ONSEMI-CS5323GDWR20 Datasheet
143Kb / 16P
   Three-Phase Buck Controller with 5-Bit DAC
August, 2002 ??Rev. 6
More results

类似说明 - CS5323GDWR20

制造商部件名数据表功能描述
logo
ON Semiconductor
NCP5322A ONSEMI-NCP5322A_07 Datasheet
718Kb / 31P
   Two?뭁hase Buck Controller with Integrated Gate Drivers and 5?묪it DAC
January, 2007 ??Rev. 5
CS5322 ONSEMI-CS5322 Datasheet
406Kb / 21P
   Two?뭁hase Buck Controller with Integrated Gate Drivers and 5?묪it DAC
July, 2006 ??Rev. 7
CS5302 ONSEMI-CS5302 Datasheet
342Kb / 17P
   Two?뭁hase Buck Controller with Integrated Gate Drivers and 4?묪it DAC
July, 2006 ??Rev.7
NCP5306 ONSEMI-NCP5306 Datasheet
872Kb / 24P
   Three?뭁hase VRM 9.0 Buck Controller
July, 2006 ??Rev. 3
CS5323-D ONSEMI-CS5323-D Datasheet
143Kb / 16P
   Three-Phase Buck Controller with 5-Bit DAC
August, 2002 ??Rev. 6
CS5303 ONSEMI-CS5303 Datasheet
390Kb / 19P
   Three?뭁hase Buck Controller with Integrated Gate Drivers
July, 2006 ??Rev. 14
NCP5318 ONSEMI-NCP5318 Datasheet
373Kb / 31P
   Two/Three/Four?뭁hase Buck CPU Controller
June, 2006 ??Rev. 4
NCP5314 ONSEMI-NCP5314_07 Datasheet
677Kb / 29P
   Two/Three/Four?뭁hase Buck CPU Controller
January, 2007 ??Rev. 10
CS5157H ONSEMI-CS5157H Datasheet
432Kb / 16P
   CPU 5?묪it Synchronous Buck Controller
October, 2005 ??Rev. 7
CS5161 ONSEMI-CS5161 Datasheet
589Kb / 18P
   CPU 5?묪it Synchronous Buck Controller
July, 2006 ??Rev. 12
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


数据表 下载

Go To PDF Page


链接网址




隐私政策
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   |   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