參數(shù)資料
型號(hào): IR3080
廠商: International Rectifier
英文描述: XPHASE VRD10 CONTROL IC WITH VCCVID & OVERTEMP DETECT
中文描述: XPHASE VRD10控制集成電路VCCVID
文件頁(yè)數(shù): 34/41頁(yè)
文件大小: 2267K
代理商: IR3080
IR3080
The over temperature setting voltage of phases 1, 2, 5, and 6 is lower than the phase delay setting voltage,
VBIAS*RA
PHASEx.
Pre-select R
PHASE11
=10k
,
=
RA
V
PHASEx
BIAS
1
8
)
1
=
RA
V
PHASEx
BIAS
)
665
.
1
*
8
)
1
*
R
PHASE21
=10k
, R
PHASE22
=2.94k
, R
PHASE23
=4.64k
R
PHASE51
=10k
, R
PHASE52
=2.32k
, R
PHASE53
=4.42k
R
PHASE61
=10k
, R
PHASE62
=8.25k
, R
PHASE63
=6.49k
The over temperature setting voltage of Phases 3 and 4 is higher than the phase delay setting voltage,
VBIAS*RA
PHASEx.
Pre-select
R
PHASEX1
=10k
,
=
HOTSET
BIAS
V
V
=
V
V
HOTSET
BIAS
79
.
8
R
PHASE41
=10k
, R
PHASE42
=768
, R
PHASE43
=2.80k
Bootstrap Capacitor
C
BST
Choose C
BST
=0.1uF
Decoupling Capacitors for Phase IC and Power Stage
Choose C
VCC
=0.1uF, C
VCCL
=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.
R
f
LE
FB
CS
E
34
)
10
*
22
62
(
2
2
π
π
180
)
tan(
90
1
π
2
3
Choose the desired crossover frequency fc (=140kHz) around fc1 estimated above, and calculate
1
4
1
π
π
C
R
R
C
DRP
576
=
=
k
R
V
V
RA
R
PHASEx
HOTSET
BIAS
PHASEx
PHASEx
1
12
)
665
.
10
*
10
)
79
.
8
665
.
*
)
(
3
1
2
=
=
k
R
V
R
PHASEx
HOTSET
PHASEx
87
.
10
*
1
12
79
.
3
1
3
=
=
887
79
.
8
10
*
10
)
198
.
79
.
)
(
3
31
3
32
PHASE
BIAS
PHASE
HOTSET
PHASE
R
V
RA
V
R
=
=
k
R
V
RA
R
PHASE
BIAS
PHASE
PHASE
67
.
10
*
10
8
198
.
*
3
31
3
33
kHz
R
R
G
C
DRP
C
146
)
/
10
*
5
162
576
3
6
1
=
=
=
°
=
=
63
θ
A
C
Choose
=
=
=
110
162
3
2
1
FB
FB
R
R
nF
R
f
C
FB
C
FB
2
110
10
*
140
4
1
3
=
=
=
, Choose C
FB
=5.6nF
nF
R
FB
FB
FB
DRP
7
10
*
6
)
110
162
(
)
(
9
1
=
+
=
+
=
Page 34 of 41
9
/30/04
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