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IR3080PBF bảng dữ liệu(PDF) 34 Page - International Rectifier

tên linh kiện IR3080PBF
Giải thích chi tiết về linh kiện  XPHASETM VRD10 CONTROL IC WITH VCCVID & OVERTEMP DETECT
PDF  41 Pages
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nhà sản xuất  IRF [International Rectifier]
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IR3080PBF bảng dữ liệu(HTML) 34 Page - International Rectifier

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IR3080
PbF
The over temperature setting voltage of phases 1, 2, 5, and 6 is lower than the phase delay setting voltage,
VBIAS*RAPHASEx. Pre-select RPHASE11=10kΩ,
Ω
=
−
∗
∗
−
∗
=
−
∗
−
∗
=
k
RA
V
R
V
V
RA
R
PHASEx
BIAS
PHASEx
HOTSET
BIAS
PHASEx
PHASEx
1
.
12
)
665
.
0
1
(
8
.
6
10
*
10
)
79
.
1
8
.
6
665
.
0
(
)
1
(
*
)
(
3
1
2
Ω
=
−
∗
=
−
∗
=
k
RA
V
R
V
R
PHASEx
BIAS
PHASEx
HOTSET
PHASEx
87
.
7
)
665
.
0
1
(
*
8
.
6
10
*
1
.
12
79
.
1
)
1
(
*
3
1
3
RPHASE21=10kΩ, RPHASE22=2.94kΩ, RPHASE23=4.64kΩ
RPHASE51=10kΩ, RPHASE52=2.32kΩ, RPHASE53=4.42kΩ
RPHASE61=10kΩ, RPHASE62=8.25kΩ, RPHASE63=6.49kΩ
The over temperature setting voltage of Phases 3 and 4 is higher than the phase delay setting voltage,
VBIAS*RAPHASEx. Pre-select RPHASEX1=10kΩ,
Ω
=
−
∗
∗
−
=
−
∗
∗
−
=
887
79
.
1
8
.
6
10
*
10
)
8
.
6
198
.
0
79
.
1
(
)
(
3
31
3
32
HOTSET
BIAS
PHASE
BIAS
PHASE
HOTSET
PHASE
V
V
R
V
RA
V
R
Ω
=
−
∗
∗
=
−
∗
=
k
V
V
R
V
RA
R
HOTSET
BIAS
PHASE
BIAS
PHASE
PHASE
67
.
2
79
.
1
8
.
6
10
*
10
8
.
6
198
.
0
*
3
31
3
33
RPHASE41=10kΩ, RPHASE42=768Ω, RPHASE43=2.80kΩ
Bootstrap Capacitor CBST
Choose CBST=0.1uF
Decoupling Capacitors for Phase IC and Power Stage
Choose CVCC=0.1uF, CVCCL=0.1uF
VOLTAGE LOOP COMPENSATION
Type III compensation is used for the converter with only ceramic output capacitors. The crossover frequency and
phase margin of the voltage loop can be estimated as follows.
kHz
R
R
G
C
R
f
LE
FB
CS
E
DRP
C
146
)
6
/
10
*
5
.
0
(
162
34
)
10
*
22
62
(
2
576
2
3
6
1
=
∗
∗
∗
∗
∗
=
∗
∗
∗
∗
=
−
−
π
π
°
=
∗
−
=
63
180
)
5
.
0
tan(
90
1
π
θ
A
C
Choose
Ω
=
∗
=
∗
=
110
162
3
2
3
2
1
FB
FB
R
R
Choose the desired crossover frequency fc (=140kHz) around fc1 estimated above, and calculate
nF
R
f
C
FB
C
FB
2
.
5
110
10
*
140
4
1
4
1
3
1
=
∗
∗
=
∗
∗
=
π
π
, Choose CFB=5.6nF
nF
R
C
R
R
C
DRP
FB
FB
FB
DRP
7
.
2
576
10
*
6
.
5
)
110
162
(
)
(
9
1
=
∗
+
=
∗
+
=
−
Page 34



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