参数资料
型号: IR3092
厂商: International Rectifier
英文描述: 2 PHASE OPTERON, ATHLON, OR VR10.X CONTROL IC
中文描述: 2相皓龙,速龙,或控制IC的VR10.X
文件页数: 29/37页
文件大小: 619K
代理商: IR3092
IR3092
Page 29 of 37
06/25/04
6
3
_
I
10
*
26
10
*
25
ROSC
NLOFST
O
FB
V
R
961
&KRRVH 5
FB
= 1k
:
k
R
R
R
R
O
L
FB
DRP
4
10
*
3
*
2
5
23
*
3
10
*
1
*
10
*
1
2
5
23
3
3
Choose R
DRP
= 9.53k
Inductor Current Sensing Capacitor C
CS
and Resistors R
CS
and R
CSO
Choose capacitor C
CS
= 0.22uF calculate R
CS
R
L
R
CS
10
*
22
.
The bias currents of CSIN+ and CSIN- are 0.2uA and 0.4uA respectively. Calculate resistor R
CSO
,
I
R
CS
CSIN
4
Set BIASOUT voltage Resistor Rset
Bias current I
SETBIAS
is around 95uA in this case. Set V
BIASOUT
around 8V to be gate drive voltage of
MOSFETs.
V
R
SETBIAS
10
*
95
Compensation of Voltage Loop
:
k
C
L
CS
9
10
*
6
7
/
10
*
45
.
3
6
Choose R
CS
=3k
:
:
k
k
R
I
CSIN
CSO
5
3
*
2
:
k
I
BIASOUT
SET
21
.
84
8
6
Choose R
SET
=82.5k
AL-Polymer output capacitors are used in the design, and the crossover frequency of the voltage loop can
be estimated as,
R
f
CE
LE
FB
CS
E
011
.
2
)
(
2
S
S
R
COMP
and C
COMP
are used to fine tune the crossover frequency and transient load response. Choose
the desired crossover frequency fc1 (=25kHz) and determine R
COMP
and C
COMP
.
325
.
RAMP
I
V
V
R
C
L
f
R
M
I
C
L
C
COMP
10
30
In practice, adjust R
COMP
and C
COMP
if need to get desired dynamic load response performance.
kHz
R
R
R
G
C
DRP
C
17
]
10
*
1
)
/
10
*
7
10
*
1
5
23
[
10
*
53
.
3
3
3
3
175
.
63
.
12
O
M
V
F
:
k
F
V
FB
E
E
C
COMP
30
175
.
12
10
*
1
011
.
)
/
10
450
(
)
10
25
2
)
2
3
9
2
3
2
1
S
S
nF
R
E
E
COMP
17
011
.
)
/
3
10
450
(
10
10
9
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