March 12, 2012 | FINAL DATASHEET

9

IR3550

60A Integrated PowIRstage®

TYPICAL OPERATING CHARACTERISTICS

8-layer PCB board of 3.7” (L) x 2.6” (W), no PWM controller loss, no inductor loss, unless specified otherwise.

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

55

Output Current (A)

Figure 7: Typical IR3550 Efficiency

Figure 8: Typical IR3550 Power Loss

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

1

2

3

4

5

6

7

8

9

10

0

5

10

15

20

25

30

35

40

45

50

55

Output Current (A)

0

5

10

15

20

25

30

35

40

45

50

55

60

65

0

5

10

15 20 25 30 35 40 45

50 55 60 65 70

75 80 85 90

Ambient Temperature (°C)

400LFM

200LFM

100LFM

0LFM

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)

-2.25

-1.50

-0.75

0.00

0.75

1.50

2.25

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)

-2.25

-1.50

-0.75

0.00

0.75

1.50

2.25

3.00

3.75

4.50

5.25

6.00

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)

-2.25

-1.50

-0.75

0.00

0.75

1.50

2.25

3.00

3.75

4.50

5.25

6.00