參數(shù)資料
型號(hào): IR3093M
廠商: International Rectifier
英文描述: 3 PHASE OPTERON, ATHLON, OR VR10.X CONTROL IC
中文描述: 3相皓龍,速龍,或控制IC的VR10.X
文件頁數(shù): 29/39頁
文件大?。?/td> 693K
代理商: IR3093M
IR3093
Page 29 of 39
07/15/04
The power good delay time is
C
t
CHG
VDAC Slew Rate Programming Capacitor C
DAC
and Resistor R
DAC
mS
I
V
SS
VccPG
2
10
*
60
)
33
.
6
75
.
*
10
*
1
*
6
'
From IR3093 data sheet, the sink current I
SINK
of VDAC pin corresponding to R
OSC
=30k
LV
Calculate the VDAC down-slope slew-rate programming capacitor from the required down-slope slew
rate.
I
C
DOWN
10
/
10
5
Choose C
VDAC
= 33nF
Calculate the programming resistor.
15
15
10
*
2
5
5
DAC
C
In practice slightly adjust R
DAC
to get desired slew rate.
Over Current Setting Resistor R
OCSET
X$
nF
SR
SINK
VDAC
34
10
3
85
6
6
2
9
2
10
*
33
10
2
DAC
R
3.4
According to the spec, the output current limit set point I
LIMIT
= 130A. The bias current I
OCSET
set by
R
ROSC
is around 40uA. Assume the maximum temperature T
L_MAX =
120 C, the room temperature
T
ROOM
=25 C, so
R
MAX
L
)]
25
120
(
10
*
3850
1
10
*
65
.
_
Assume maximum IC temperature T
IC_MAX=
110C, the minimum current sense amplifier gain can be
calculated from Equation (11).
21
)]
25
110
(
10
*
1400
1
5
23
_
MIN
CS
G
Using Equation (12) and (13) to calculate R
OCSET:
)
33
.
12
(
33
.
)
(
3
6
'
fsw
Vin
L
'
I
G
R
R
OCSET
MIN
CS
MAX
L
OCSET
/
]
)
2
3
Choose R
OCSET
= 25 k
:
m
9
6
3
6
8
15
10
300
12
10
25
.
Vo
Vin
Vo
I
A
:
k
I
I
LIMIT
2
24
)
10
40
/(
21
]
10
9
)
2
8
15
3
130
[(
[(
6
3
_
_
The value of the internal current source current I
FB
in the curve is 42uA according to R
ROSC
= 30k
No Load Output Voltage Setting Resistor R
FB
and Adaptive Voltage Positioning Resistor R
DRP
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