0

10

20

30

40

50

0

1

2

3

4

5

6

VO =3.3V

VO =5V

V

=12V

O

0

1

2

3

4

0

1

2

3

4

5

6

5

0

1

2

3

4

5

6

50

60

70

80

90

100

V

=12V

O

20

30

40

50

60

70

80

90

0

1

2

3

4

5

6

200LFM

100LFM

Natconv

Airflow

20

30

40

50

60

70

80

90

0

1

2

3

4

5

6

200LFM

100LFM

Natconv

Airflow

PTN78020W

PTN78020H

EFFICIENCY

OUTPUT VOLTAGE RIPPLE

POWER DISSIPATION

vs

vs

vs

OUTPUT CURRENT

OUTPUT CURRENT

OUTPUT CURRENT

Figure 6.

Figure 7.

Figure 8.

TEMPERATURE DERATING

TEMPERATURE DERATING

vs

vs

OUTPUT CURRENT

OUTPUT CURRENT

Figure 9.

Figure 10.

(1)

The electrical characteristic data has been developed from actual products tested at 25

°C. This data is considered typical for the

converter. Applies to Figure 6, Figure 7, and Figure 8.

(2)

The temperature derating curves represent the conditions at which internal components are at or below the manufacturer's maximum

operating temperatures. Derating limits apply to modules soldered directly to a 100 mm x 100 mm double-sided PCB with 2 oz. copper.

For surface mount packages (AS and AZ suffix), multiple vias (plated through holes) are required to add thermal paths around the power

pins. Please refer to the mechanical specification for more information. Applies to Figure 9 and Figure 10.

Copyright © 2004–2008, Texas Instruments Incorporated

Submit Documentation Feedback

7

Product Folder Link(s): PTN78020W PTN78020H