Product # SQ60120QPA28

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-2SQ612J Rev. B

06/17/09

Page 5

Input:

Output:

Current:

Package:

36-75 V

12 V

28 A

Quarter-brick

Technical Specification

70

75

80

85

90

95

100

0

4

8

12

16

20

24

28

Load Current (A)

36 Vin

48 Vin

75 Vin

0

5

10

15

20

25

30

0

4

8

12

16

20

24

28

Load Current (A)

36 Vin

48 Vin

75 Vin

Figure 2: Power dissipation at nominal output voltage vs. load current

91

92

93

94

95

96

97

100

200

300

400

Air Flow (LFM)

25 ºC

40 ºC

55 ºC

Figure 3: Efficiency at nominal output voltage and 60% rated power

(nominal input voltage).

7

8

9

10

11

12

13

14

0

4

8

12

16

20

24

28

Load Current (A)

36V

48V

75V

Figure 4: Output voltage regulation vs. load current for minimum,

0

5

10

15

20

25

30

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 0 LFM through 400 LFM with air flowing

from pin 3 to pin 1 (nominal input voltage).

Figure 6: Thermal plot of converter at 23.3 amp load current (279.6W)

converter from pin 3 to pin 1 (nominal input voltage).

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

Semiconductor junction temperature is

within 1°C of surface temperature

Figures