Input:

Input:

Output:

Output:

Current:

Current:

ackage:

35-75 V

35-75 V

48 V

48 V

3 A

(144W)

Quarter-brick

Quarter-brick

T

pecification

Product # PQ60480QTA03

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-2QT648C Rev. A

9/4/07

Page 5

86

88

90

92

94

96

98

100

200

300

400

Air Flow (LFM)

25º C

40º C

55º C

4

5

6

7

8

9

10

100

200

300

400

Air Flow (LFM)

25º C

40º C

55º C

60

65

70

75

80

85

90

95

100

0.0

0.5

1.0

1.5

2.0

2.5

3.0

Load Current (A)

35 Vin

48 Vin

75 Vin

Figure 1: Efficiency at nominal output voltage vs. load current for min-

Figure 2: Efficiency at nominal output voltage and 60% rated power vs.

(nominal input voltage).

0

2

4

6

8

10

12

14

0.0

0.5

1.0

1.5

2.0

2.5

3.0

Load Current (A)

35 Vin

48 Vin

75 Vin

Figure 3: Power dissipation at nominal output voltage vs. load current

Figure 4: Power dissipation at nominal output voltage and 60% rated

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

25

40

55

70

85

Ambient Air Temperature (°C)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

Figure 5: Maximum output power derating curves vs. ambient air tem-

perature for airflow rates of 100 LFM through 400 LFM with air flow-

ing across the converter from input to output (nominal input voltage).

Figure 6: Thermal plot of converter at 3 amp load current (144W) with

verter from input to output (nominal input voltage).

Semiconductor junction temperature is

within 1°C of surface temperature