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

X  

CS51033YD8 数据表(PDF) 8 Page - ON Semiconductor

部件名 CS51033YD8
功能描述  Fast PFET Buck Controller
Download  12 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

CS51033YD8 数据表(HTML) 8 Page - ON Semiconductor

Back Button CS51033YD8 Datasheet HTML 4Page - ON Semiconductor CS51033YD8 Datasheet HTML 5Page - ON Semiconductor CS51033YD8 Datasheet HTML 6Page - ON Semiconductor CS51033YD8 Datasheet HTML 7Page - ON Semiconductor CS51033YD8 Datasheet HTML 8Page - ON Semiconductor CS51033YD8 Datasheet HTML 9Page - ON Semiconductor CS51033YD8 Datasheet HTML 10Page - ON Semiconductor CS51033YD8 Datasheet HTML 11Page - ON Semiconductor CS51033YD8 Datasheet HTML 12Page - ON Semiconductor  
Zoom Inzoom in Zoom Outzoom out
 8 / 12 page
background image
CS51033
http://onsemi.com
8
If we choose an arbitrary startup time of 200
µs, we
calculate the value of CS from:
T
+ CS
2.5 V
ICHARGE
CS(MIN) +
200
ms
264
mA
2.5 V
+ 0.02 mF
Use 0.1
µF.
The fault time out time is the sum of the slow discharge
time the fast discharge time and the recharge time and is
obviously dominated by the slow discharge time.
The first parameter is the slow discharge time, it is the time
for the CS capacitor to discharge from 2.4 V to 1.5 V and is
given by:
TSLOWDISCHARGE +
CS
(2.4 V
* 1.5 V)
IDISCHARGE
where IDISCHARGE is 6.0 µA typical.
TSLOWDISCHARGE + CS
1.5 V
105
The fast discharge time occurs when a fault is first
detected. The CS capacitor is discharged from 2.5 V to 2.4 V.
TFASTDISCHARGE +
CS
(2.5 V
* 2.4 V)
IFASTDISCHARGE
where IFASTDISCHARGE is 66 µA typical.
TFASTDISCHARGE + CS
1515
The recharge time is the time for CS to charge from 1.5 V
to 2.5 V.
TCHARGE +
CS
(2.5 V
* 1.5 V)
ICHARGE
where ICHARGE is 264 µA typical.
TCHARGE + CS
3787
The fault time out time is given by:
TFAULT + CS
(3787
) 1515 ) 1.5
105)
TFAULT + CS
(1.55
105)
For this circuit
TFAULT + 0.1
10*6
1.55
105
+ 0.0155
A larger value of CS will increase the fault time out time
but will also increase the Soft Start time.
8) Input Capacitor
The input capacitor reduces the peak currents drawn from
the input supply and reduces the noise and ripple voltage on
the VCC and VC pins. This capacitor must also ensure that
the VCC remains above the UVLO voltage in the event of an
output short circuit. CIN should be a low ESR capacitor of
at least 100
µF. A ceramic surface mount capacitor should
also be connected between VCC and ground to prevent
spikes.
9) MOSFET Selection
The CS51033 drives a P–channel MOSFET. The VGATE
pin swings from GND to VC. The type of PFET used
depends on the operating conditions but for input voltages
below 7.0 V a logic level FET should be used.
Choose a PFET with a continuous drain current (ID) rating
greater than the maximum output current. RDS(ON) should
be less than
RDS t+
0.6 V
IOUT(MAX)
167 m
W
The Gate–to–Source voltage VGS and the Drain–to
Source Breakdown Voltage should be chosen based on the
input supply voltage.
The power dissipation due to the conduction losses is
given by:
PD + IOUT2
RDS(ON)
D
The power dissipation due to the switching losses is given
by:
PD + 0.5
VIN
IOUT
(TRr ) TF)
FSW
where TR = Rise Time and TF = Fall Time.
10) Diode Selection
The flyback or catch diode should be a Schottky diode
because of it’s fast switching ability and low forward voltage
drop. The current rating must be at least equal to the
maximum output current. The breakdown voltage should be
at least 20 V for this 12 V application.
The diode power dissipation is given by:
PD + IOUT
VD
(1.0
* DMIN)


类似零件编号 - CS51033YD8

制造商部件名数据表功能描述
logo
Cherry Semiconductor Co...
CS51033YD8 CHERRY-CS51033YD8 Datasheet
159Kb / 8P
   Fast PFET Buck Controller Does Not Require Compensation
logo
ON Semiconductor
CS51033YD8 ONSEMI-CS51033YD8 Datasheet
96Kb / 10P
   Fast P?묬h FET Buck Controller
October, 2005 ??Rev. 10
CS51033YD8G ONSEMI-CS51033YD8G Datasheet
96Kb / 10P
   Fast P?묬h FET Buck Controller
October, 2005 ??Rev. 10
More results

类似说明 - CS51033YD8

制造商部件名数据表功能描述
logo
HTC Korea TAEJIN Techno...
LM51031 HTC-LM51031 Datasheet
273Kb / 9P
   Fast PFET Buck Controller
logo
ON Semiconductor
CS51031 ONSEMI-CS51031 Datasheet
86Kb / 12P
   Fast PFET Buck Controller
December, 2001 ??Rev. 9
logo
Texas Instruments
LM3485 TI-LM3485_15 Datasheet
1Mb / 24P
[Old version datasheet]   Hysteretic PFET Buck Controller
logo
National Semiconductor ...
LM3485 NSC-LM3485 Datasheet
369Kb / 15P
   Hysteretic PFET Buck Controller
logo
Texas Instruments
LM3485 TI1-LM3485_14 Datasheet
1,023Kb / 22P
[Old version datasheet]   Hysteretic PFET Buck Controller
LM3475 TI1-LM3475_14 Datasheet
1Mb / 21P
[Old version datasheet]   Hysteretic PFET Buck Controller
LM3485 TI1-LM3485_16 Datasheet
1Mb / 28P
[Old version datasheet]   Hysteretic PFET Buck Controller
logo
Cherry Semiconductor Co...
CS51031 CHERRY-CS51031 Datasheet
153Kb / 8P
   Fast PFET Buck Controller Does Not Require Compensation
CS51033 CHERRY-CS51033 Datasheet
159Kb / 8P
   Fast PFET Buck Controller Does Not Require Compensation
logo
National Semiconductor ...
LM3475 NSC-LM3475 Datasheet
305Kb / 14P
   Hysteretic PFET Buck Controller
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


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