Product # PQ60033EGx20

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-0005349 Rev. A

09/23/09

Page 5

Input:

Output:

Current:

Package:

35-75 V

3.3 V

20 A

Eighth-brick

Technical Specification

60

65

70

75

80

85

90

95

0

2

4

6

8

10

12

14

16

18

20

Load Current (A)

35 Vin

48 Vin

75 Vin

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

nominal, and maximum input voltage at 25°C.

84

85

86

87

88

89

90

91

92

0

100

200

300

400

500

Air Flow (LFM)

25 C

40 C

55 C

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

airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C (nominal

input voltage).

0

1

2

3

4

5

6

7

8

9

10

11

0

2

4

6

8

10

12

14

16

18

20

Load Current (A)

35 Vin

48 Vin

75 Vin

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

minimum, nominal, and maximum input voltage at 25°C.

84

85

86

87

88

89

90

91

92

0

100

200

300

400

500

Air Flow (LFM)

25 C

40 C

55 C

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

vs. airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C (nominal

input voltage).

0

2

4

6

8

10

12

14

16

18

20

0

25

40

55

70

85

Ambient Air Temperature (

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

50 LFM (0.25 m/s)

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

for airflow rates of 50 LFM through 400 LFM with air flowing across the

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

Figure 6: Thermal plot of converter at 19 amp load current (63W) with 55°C air

flowing at the rate of 200 LFM. Air is flowing across the converter from pin 3 to

pin 1 (nominal input voltage).

Semiconductor junction temperature is

within 1°C of surface temperature

Figures