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

X  

预览 PDF HTML

IR3840WM 数据表(PDF) 23 Page - International Rectifier

部件名 IR3840WM
功能描述  HIGHLY EFFICIENT INTEGRATED 12A SYNCHRONOUS BUCK REGULATOR
PDF  34 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  IRF [International Rectifier]
网页  http://www.irf.com
标志 IRF - International Rectifier

IR3840WM 数据表(HTML) 23 Page - International Rectifier

Back Button IR3840WM Datasheet HTML 19Page - International Rectifier IR3840WM Datasheet HTML 20Page - International Rectifier IR3840WM Datasheet HTML 21Page - International Rectifier IR3840WM Datasheet HTML 22Page - International Rectifier IR3840WM Datasheet HTML 23Page - International Rectifier IR3840WM Datasheet HTML 24Page - International Rectifier IR3840WM Datasheet HTML 25Page - International Rectifier IR3840WM Datasheet HTML 26Page - International Rectifier IR3840WM Datasheet HTML 27Page - International Rectifier Next Button
Zoom Inzoom in Zoom Outzoom out
 23 / 34 page
background image
Rev 12.0
PD-97657
IR3840WMPbF
23
Detailed calculation of compensation TypeIII
kΩ
2.49
:
Select
kΩ
2.49
;
*
kΩ
3.92
:
Select
,
kΩ
3.97
;
*
*
Ω
130
:
Select
,
Ω
128
;
*
*
:
and
,
Calculate
pF
220
:
Select
,
pF
283.7
;
*
*
nF
10
:
Select
nF,
9.65
;
*
*
2
1
k
1.87
:
Select
kΩ
1.85
;
*
*
*
*
*
:
and
,
Calculate
nF
2.2
C
:
Select
kHz
300
*
0.5
and
kHz
8.82
*
.
:
Select
kHz
567.1
sin
sin
kHz
17.63
sin
sin
70
Margin
Phase
Desired
3
7
o
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
Ω
=
=
=
=
=
=
=
=
=
Θ
−
Θ
+
=
=
Θ
+
Θ
−
=
=
Θ
9
9
8
9
8
8
10
2
7
8
10
10
2
7
10
9
8
10
3
3
3
3
3
4
4
1
4
3
3
7
3
4
3
3
3
2
1
2
2
-
-
2
1
2
1
2
1
2
5
0
1
1
1
1
R
R
R
V
V
V
R
R
R
R
F
C
R
R
R
F
C
R
R
R
R
C
C
R
F
C
C
C
R
F
C
R
R
V
C
V
C
L
F
R
C
C
R
F
F
F
F
F
F
F
F
ref
o
ref
Z
P
P
Z
in
osc
o
o
o
s
P
Z
Z
o
P
o
Z
π
π
π
π
π
Programming the Current-Limit
The Current-Limit threshold can be set by
connecting a resistor (R
OCSET) from the SW pin
to the OCSet pin. The resistor can be calculated
by using equation (4). This resistor R
OCSET must
be placed close to the IC.
The
R
DS(on)
has
a
positive
temperature
coefficient and it should be considered for the
worst case operation.
Setting the Power Good Threshold
A window comparator internally sets a lower
Power Good threshold at 0.6V and an upper
Power Good threshold at 0.8V. When the voltage
at the FB pin is within the window set by these
thresholds, PGood is asserted.
The PGood is an open drain output. Hence, it is
necessary to use a pull up resistor R
PG from
PGood pin to Vcc.
The value of the pull-up
resistor must be chosen such as to limit the
current flowing into the PGood pin, when the
output voltage is not in regulation, to less than 5
mA. A typical value used is 10kΩ.
kΩ
2.15
R
Select
kΩ
2.17
R
kHz)
600
F
(at
μA
59.07
I
)
current
output
nominal
over
(50%
A
18
1.5
A
12
I
I
mΩ
7.125
1.25
mΩ
.
R
OCSet
s
OCSet
)
LIM
(
o
SET
)
on
(
DS
=
=
=
=
=
=
≅
=
=
7
7
5
*
*
(32)
...
..........
..........
)
(
)
(
R
I
R
I
I
on
DS
OCSet
OCSet
critical
L
SET
∗
=
=



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


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