Manual
GE
Data Sheet
QBVW033A0B Barracuda Series; DC-DC Converter Power Modules
36-75Vdc Input; 12.0Vdc, 33.0A, 400W Output
May 21, 2013 ©2012 General Electric Company. All rights reserved. Page 11
Thermal Considerations (continued)
OUTPUT CURRENT, I
O
(A)
OUTPUT CURRENT, I
O
(A)
LOCAL AMBIENT TEMPERATURE, T
A
(C)
LOCAL AMBIENT TEMPERATURE, T
A
(C)
Figure 19. Output Current Derating for the Open Frame
QBVW033A0B in the Transverse Orientation; Airflow
Direction from Vin(-) to Vin(+); Vin = 48V.
Figure 22. Output Current Derating for the Base plate
QBVW033A0B-H with 0.5” heatsink in the Transverse
Orientation; Airflow Direction from Vin(-) to Vin(+); Vin = 48V
OUTPUT CURRENT, I
O
(A)
OUTPUT CURRENT, I
O
(A)
LOCAL AMBIENT TEMPERATURE, T
A
(C)
LOCAL AMBIENT TEMPERATURE, T
A
(C)
Figure 20. Output Current Derating for the Base plate
QBVW033A0B-H in the Transverse Orientation; Airflow
Direction from Vin(-) to Vin(+); Vin = 48V.
Figure 23. Output Current Derating for the Base plate
QBVW033A0B-H with 1.0” heatsink in the Transverse
Orientation; Airflow Direction from Vin(-) to Vin(+); Vin = 48V.
OUTPUT CURRENT, I
O
(A)
OUTPUT CURRENT, I
O
(A)
LOCAL AMBIENT TEMPERATURE, T
A
(C)
COLD WALL TEMPERATURE, T
C
(C)
Figure 21. Output Current Derating for the Base plate
QBVW033A0B-H with 0.25” heatsink in the Transverse
Orientation; Airflow Direction from Vin(-) to Vin(+); Vin =
48V
Figure 24. Output Current Derating for the Base Plate
QBVW033A0B-H in a Cold wall application; Local Internal Air
Temperature near module=80C, V
IN
= 48V, V
OUT
setting
anywhere from 6.0V to 12.0V.