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IP1206PBF Datasheet(PDF) 24 Page - International Rectifier

Part # IP1206PBF
Description  Synchronous Buck Multiphase Optimized LGA Power Block
PDF  30 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IP1206PBF Datasheet(HTML) 24 Page - International Rectifier

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2/26/2008
www.irf.com
24
iP1206PbF
Programming the Current-Limit
The Current-Limit threshold can be set by
connecting a resistor (ROCSET) from drain of low
side MOSFET to the OCSet pin. The resistor
value can be obtained by using Fig. 24.
It is important to pay careful attention to the
layout of this resistor. It is recommended to
place this resistor close to the IC and away from
possible noisy traces. A small ceramic capacitor
from this pin to ground can also be place for
noise rejection purposes.
Ω
=
=
+
=
⇒
=
=
+
=
=
K
I
I
I
I
where
)
(
I
I
I
trip
Peak
L
Peak
L
Peak
L
trip
23
.
5
5
.
7
,
,
max
,
max
OCSET
R
get
we
24
Fig.
From
14.25A
1.5A
1.5
*
8.5
A
1
3A
of
ripple
inductor
an
and
8.5A
of
current
load
DC
maximum
a
For
Current
Inductor
Peak
1.5
*
current
load
DC
Maximum
-
-
-
-
Fig. 24: ROCSET selection from Peak Inductor Current
The trip current Itrip is given by:
1
2
3
4
5
6
7
8
9
10
11
12
13
56789
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Peak Inductor Current (A)
()
:
Note
2
*
2
,
s
in
o
o
in
Peak
L
F
L
V
V
V
V
i
I
∗
∗
−
=
Δ
=



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