IRDCIP2005C-2 International Rectifier, IRDCIP2005C-2 Datasheet - Page 9

• Manufacturer Part Number: IRDCIP2005C-2
• Description: BOARD DEMO SYNC BUCK CONVETER
• Manufacturer: International Rectifier

Specifications of IRDCIP2005C-2

• Package: Design Kit
• Featured Part: iP2005C
• Input Voltage (v): 8.5V - 14.5V
• Output Voltage (v): 0.8V - 5.0V
• Total Current: 30A
• Phases: 1
• Switching Frequency (khz): 500kHz

Calculating SOA Temperature:
(Figure 3) SOA temperature adjustment for input voltage ≈ -0.6ºC
(Figure 5) SOA temperature adjustment for output inductor ≈ 0.25 ºC
(Figure 6) SOA temperature adjustment for switch frequency ≈ -2.5 ºC
T
Assuming T
adjusted for T
The SOA adjustment indicates the part is still allowed to run at a continuous current of 39A.
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X
axis intercept adjustment ≈ -0.6 ºC + 0.25 ºC – 2.5 ºC ≈ -2.9 ºC
1. Draw a line from Case Temperature axis to the PCB Temperature axis.
2. Draw a vertical line from the T
3. Draw a horizontal line from the intersection of the vertical line with the SOA curve to the Y-axis
4. Draw a new vertical line from the T
5.
(Output Current).
continuous current.
temperature from the original T
Draw a horizontal line from the intersection of the new vertical line with the SOA curve to the
Y-axis (Output Current). The point at which the horizontal line meets the Y-axis is the new
SOA continuous current
PCB
X
decrease of 2.8 ºC
= 100ºC & T
44
44
40
40
36
36
32
32
28
28
24
24
20
20
16
16
12
12
8
8
4
4
0
0
0
0
0
0
F
F
L
L
V
V
sw
sw
V
V
O
O
V
V
O
O
D
D
10
10
I
I
= 300nH
= 300nH
10
10
= 1MHz
= 1MHz
= 12V
= 12V
= 5.0V
= 5.0V
= 1.3V
= 1.3V
The point at which the horizontal line meets the Y-axis is the SOA
CASE
20
20
20
20
Operating
Operating
.
Area
Area
Safe
Safe
30
30
30
30
= 110ºC, the following example shows how the SOA current is
X
X
04/09/2009
axis intercept to the SOA curve.
40
40
40
40
intercept point.
PCB Temperature (ºC)
PCB Temperature (ºC)
Case Temperature (ºC)
Case Temperature (ºC)
50
50
50
50
X
axis by adding or subtracting the SOA adjustment
60
60
60
60
5
5 5
70
70
70
70
80
80
80
80
3
3 3
90
90
90
90
4
4 4
100
100
100
100
2
2 2
1
1 1
110
110
110
110
iP2005CPbF
120
120
120
120
130
130
130
130
PD-60360
Tx
Tx
9