參數(shù)資料
型號: 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): 28/39頁
文件大小: 693K
代理商: IR3093M
IR3093
Page 28 of 39
07/15/04
IR3093 Demo Board for VRD10.1 Application
Specifications:
Input Voltage: V
I
=12 V
DAC Voltage: V
DAC
=1.35 V
No Load Output Voltage Offset: V
O_NLOFST
=20 mV
Output Current: I
O
=101 A DC
Output Current Limit set point: I
LIMIT
=130 A
Output Impedance: R
O
=1m
VCC Ready to VCC Power Good Delay: t
VccPG
=0-10mS
Soft Start Time: t
SS
=2 mS
Dynamic VID Down-Slope Slew Rate: SR
DOWN
=2.5mV/uS
Power Stage Design
Control IC: IR3093
Phase Number: n=3
Switching Frequency: f
SW
=300 kHz
Output Inductors: L=0.25 uH, R
L
=0.65 m
Output Capacitors: C=0.007F, R
CE
=0.7 m
External Components of IR3093
Once the switching frequency is chosen, R
OSC
can be determined from the curve in the datasheet of
IR3093 data sheet. For switching frequency of 300 kHz per phase, Choose R
OSC
=30k
Soft Start Capacitor C
SS
Calculate the soft start capacitor from the required soft start time 2mS.
t
I
C
O
10
*
20
35
.
F
V
SS
CHG
SS
6
3
3
6
10
*
09
.
10
*
2
*
10
*
60
*
Choose C
SS =
0.1 uF
With the selected Css value, we can calculate the following delay times:
The Over-Current fault latch delay time
t
OCDEL
will be:
V
C
t
DISCHG
10
*
61
The soft start delay time is
V
C
t
CHG
10
*
60
mS
I
SS
OCDEL
4
25
.
*
6
10
*
1
*
6
'
mS
I
SS
SSDEL
8
1
*
6
10
*
1
*
6
'
DESIGN EXAMPLE
Oscillator Resistor Rosc
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