TYPICAL PERFORMANCE CURVES

HPQ-3.3/50-D48

Efficiency vs Line Voltage and Load Current @ +25°C

HPQ-3.3/50-D48

Maximum Current Temperature Derating

(Vin=48V, no baseplate, longitudinal air flow)

65

70

75

80

85

90

95

5

1015

20253035

404550

Load Current (Amps)

2

4

6

8

10

12

14

16

18

20

22

24

Power Dissipation

10

15

20

25

30

35

40

45

50

30

40

50

60

70

80

100 LFM

200 LFM

300 LFM

400 LFM

LOAD

+OUTPUT

–INPUT

+INPUT

ON/OFF

CONTROL

TRIM

+SENSE

–OUTPUT

–SENSE

4

5

1

3

6

8

7

2

Figure 5. Trim Connections To Increase Output Voltages Using Fixed Resistors

LOAD

+OUTPUT

–INPUT

+INPUT

ON/OFF

CONTROL

TRIM

+SENSE

–OUTPUT

–SENSE

4

5

1

3

6

8

7

2

Figure 6. Trim Connections To Decrease Output Voltages Using Fixed Resistors

UP

1.225x¨

–

16.863(1+¨)

where ¨ is the absolute value of

(¨ is always positive)

¨

5.11

–10.22

–10.22

¨

5.11

(k ) =

DOWN

HPQ-3.3/50-D48

3.3

()

Trim Up

Trim Down

HPQ Series

Isolated High Power Quarter Brick DC/DC Converters

MDC_HPQ Series.A07 Page 8 of 10

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