Product # BQ50120QTA20

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-2BQ512J Rev. E

03/17/06

Page 5

Input:

Input:

Output:

Output:

Current:

Current:

ackage:

42-53 V

42-53 V

12 V

12 V

20 A

20 A

Quarter-brick

Quarter-brick

T

pecification

80

82

84

86

88

90

92

94

96

98

100

0

2

4

6

8

10

12

14

16

18

20

Load Current (A)

42 Vin

48 Vin

52 Vin

0

1

2

3

4

5

6

7

8

9

10

0

2

4

6

8

10

12

14

16

18

20

Load Current (A)

42 Vin

48 Vin

52 Vin

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

92

93

94

95

96

97

98

0

100

200

300

400

500

25 C

40 C

55 C

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

(nominal input voltage).

8

9

10

11

12

13

14

15

0

2

4

6

8

10

12

14

16

18

20

Load Current (A)

42Vin

48Vin

52Vin

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

0

2

4

6

8

10

12

14

16

18

20

025

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)

0 LFM (0 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 20 amp load current (240W)

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

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

Semiconductor junction temperature is

within 1°C of surface temperature