July 16, 2014 | DATASHEET V3.3

9

IR3553

40A 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.

Figure 7: Typical IR3553 Efficiency

Figure 8: Typical IR3553 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

80

81

82

83

84

85

86

87

88

89

90

91

92

93

0

5

10

15

20

25

30

35

40

Output Current (A)

0

1

2

3

4

5

6

7

8

9

10

0

5

10

15

20

25

30

35

40

Output Current (A)

0.80

0.85

0.90

0.95

1.00

1.05

1.10

1.15

1.20

1.25

1.30

5

6

7

8

9

10

11

12

13

14

15

Input Voltage (V)

-6.0

-4.5

-3.0

-1.5

0.0

1.5

3.0

4.5

6.0

7.5

9.0

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

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)

-6

-3

0

3

6

9

12

15

0.80

0.85

0.90

0.95

1.00

1.05

1.10

1.15

1.20

1.25

1.30

200

300

400

500

600

700

800

900

1000

Switching Frequency (kHz)

-6.0

-4.5

-3.0

-1.5

0.0

1.5

3.0

4.5

6.0

7.5

9.0