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4

SLTS165E - FEBRUARY 2002 - REVISED MARCH 2003

PT4821—48V

35-W Triple Output Isolated DC/DC

Converter for Logic Applications

Efficiency vs Output Power

PT4821 Performance Characteristics

(See Notes A, B)

Typical Characteristics

Power Dissipation vs Output Load

Note A:

All Characteristic data in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.

Note B:

Output Load (%) represents the percent drawn from each output of the stated 100% load condition.

Note C:

SOA curves represent operating conditions at which the internal components are at or below the manufacturer’s maximum rated operating temperatures.

50

60

70

80

90

100

0

20406080

100

Output Load (%)

36V

48V

75V

0

20

40

60

80

100

0

2040

6080

100

Output Load (%)

3.3V

2.5V

1.5V

0

2

4

6

8

0

20406080

100

Output Load (%)

75V

48V

36V

50

60

70

80

90

100

0

20406080

100

Output Load (%)

36V

48V

75V

0

20

40

60

80

100

0

2040

6080

100

Output Load (%)

3.3V

2.5V

1.5V

Efficiency vs Output Power

20

30

40

50

60

70

80

90

0%

20%

40%

60%

80%

100%

Output Load (%)

200LFM

120LFM

60LFM

Nat conv

Airflow