Technical Specification

Product # PQ50120HZx55

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-0005483 Rev. 1

03/31/10

Page 6

60

65

70

75

80

85

90

95

100

0

5

10

15

20

25

30

35

40

45

50

55

Load Current (A)

44 Vin

48 Vin

52 Vin

0

10

20

30

40

50

60

0

5

10

15

20

25

30

35

40

45

50

55

Load Current (A)

44 Vin

48 Vin

52 Vin

0

5

10

15

20

25

30

35

40

45

50

25

40

55

70

85

Ambient Temperature (C)

400 LFM

300 LFM

200 LFM

100 LFM

50 LFM

Figures

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

nominal, and maximum input voltage at 25°C.

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

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

Figure 3: Maximum output power-derating curve vs. ambient air temperature

for airflow rates of 100LFM through 400LFM with air flowing from pin 4 to pin

1 (nominal input voltage).

Figure 4: Thermal plot of converter at 36A load current (432W) with 55°C air

flowing at the rate of 200LFM. Air is flowing across the converter from pin 4 to

pin 1 (nominal input voltage).

Figure 5: Turn-on transient at full load (resistive load) (10 ms/div).

Ch 1: Vout (5 V/div)

Ch 2: ON/OFF input (5 V/div)

Figure 6: Turn-on transient at zero load (10 ms/div).

Ch 1: Vout (5 V/div)

Ch 2: ON/OFF input (5 V/div)

Semiconductor junction temperature is

within 1°C of surface temperature