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IR3551 Datasheet(PDF) 9 Page - International Rectifier

Part No. IR3551
Description  50A Integrated PowIRstage
Download  22 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IR3551 Datasheet(HTML) 9 Page - International Rectifier

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July 16, 2013 | DATASHEET V3.2
9
IR3551
50A Integrated PowIRstage®
TYPICAL OPERATING CHARACTERISTICS
Circuit of Figure 32, VIN=12V, VOUT=1.2V, ƒSW = 400kHz, L=150nH (0.29mΩ), VCC=7V, TAMBIENT = 25°C, no heat sink, no air flow,
8-layer PCB board of 3.7” (L) x 2.6” (W), no PWM controller loss, no inductor loss, unless specified otherwise.
Figure 7: Typical IR3551 Efficiency
Figure 8: Typical IR3551 Power Loss
Figure 9: Thermal Derating Curve, TCASE <= 125°C
Figure 10: Normalized Power Loss vs. Input Voltage
Figure 11: Normalized Power Loss vs. Output Voltage
Figure 12: Normalized Power Loss vs. Switching Frequency
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
200
300
400
500
600
700
800
900
1000
Switching Frequency (kHz)
-3.3
-2.2
-1.1
0.0
1.1
2.2
3.3
4.4
5.5
6.6
7.7
8.8
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2
Output Voltage (V)
-3.3
-2.2
-1.1
0.0
1.1
2.2
3.3
4.4
5.5
6.6
7.7
8.8
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
0
5
10
15
20
25
30
35
40
45
50
Output Current (A)
0
1
2
3
4
5
6
7
8
9
10
0
5
10
15
20
25
30
35
40
45
50
Output Current (A)
0.85
0.90
0.95
1.00
1.05
1.10
1.15
5
6
7
8
9
10
11
12
13
14
15
Input Voltage (V)
-3.3
-2.2
-1.1
0.0
1.1
2.2
3.3


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